99results about How to "High use value" patented technology

The present invention provides systems and methods in which an irrigation management system reduces high peak water use values by utilizing a microprocessor (220) disposed in an irrigation controller (100) to receive peak water use information from a water supplier receive water use information at a consumer site and automatically derive a new irrigation schedule that is at least partly based on the information received. The new irrigation schedule, derived by the microprocessor (220), may include a modification in a default irrigation frequency, a modification in a default irrigation start time(s), a reduction in a default irrigation application duration, the use of a rolling-average in the determination of the new irrigation application duration and other changes or modifications to the default irrigation schedule that will provide for the reduction in high peak water use values. Additionally, the microprocessor will display to the water user and / or third parties details on the new irrigation schedule and information received from the water supplier.

The invention provides a panorama image stitching method based on three-dimensional laser point cloud, and the method comprises the following steps during calculating pixel coordinates of a raw image corresponding to a target panorama image: 1) constructing a ray according to pixel coordinates of the target panorama image, and converting a ray in a point cloud coordinate system through employing the posture of a camera in the point cloud coordinate system; 2) obtaining three-dimensional coordinates in the ray direction through neighbor point cloud interpolation; 3) calculating pixel coordinates corresponding to the raw image through employing the position and posture of the camera in the point cloud coordinate system and the internal and external parameters of the camera according to the three-dimensional coordinates. The method provided by the invention irons out the defects of a conventional panorama image stitching method, can improve the stitching accuracy, reduces the manual operation, shortens the data production cycle, and has very high economic and social values.

An information processing apparatus includes a face detecting unit that detects a face area included in image data, a face-component detecting unit that detects a face component from the face area detected by the face detecting unit, and a line-of-sight discriminating unit that executes line-of-sight discrimination processing for a face image from which the face component is detected by the face-component detecting unit. The line-of-sight discriminating unit executes processing for discriminating whether a line of sight of the face image data from which the face component is detected is in a positive state in which a line of sight is directed in a camera direction or a negative state in which a line of sight is not directed in a camera direction according to collation processing for a line-of-sight discrimination dictionary in which learning data including classification data corresponding to the respective states are stored and input face image data.

The invention relates to a cogeneration unit deep peak regulating system and a running method thereof. No effective thermal power generating unit electric power peak regulating technology exists at present. The cogeneration unit deep peak regulating system comprises a boiler, a turbine, a power generator, a heat exchange station, a heat user, a heat supply extraction steam pipe and a heat supply pipeline. The turbine is connected with the power generator, and the heat exchange station is connected with the heat user through the heat supply pipeline. The cogeneration unit deep peak regulating system further comprises a heat exchange device, a heat storage device, a main steam pipe, a reheat steam pipe and a temperature and pressure reduction device; the boiler is connected with the main steam pipe, and the main steam pipe is divided into two branches connected with the turbine and the temperature and pressure reduction device correspondingly; the turbine is connected with the reheat steam pipe, and the reheat steam pipe is divided into two branches connected with the boiler and the temperature and pressure reduction device correspondingly; and the temperature and pressure reduction device, the heat exchange device and the heat storage device are sequentially connected through a pipeline. The heat storage device is connected with the heat supply pipeline through a pipeline. The cogeneration unit deep peak regulating system is reasonable in design and reliable in performance, and unit electric power peak regulating and heat load peak clipping and valley filling are facilitated.

The invention provides a building elevation extraction method based on building outer contour lines and a laser point cloud. The building elevation extraction method includes the following steps that the outer contour lines of a building are obtained; a ground plane, namely an XY plane, is selected and used as a projection plane, projections of the outer contour lines on the XY plane are shown as multiple line segments which are from P1, P2 to Pn, and a buffering region is selected; whether laser points in a three-dimensional panoramic picture are in the buffering region is judged, and therefore all the laser points in the buffering region are obtained; and a filtering algorithm is used, all the laser points in the buffering region are subjected to denoising processing, and then building elevations are generated according to the laser points and the outer contour lines of the building. Through the building elevation extraction method based on the building outer contour lines and the laser point cloud, the defects in the prior art are overcome, the building elevations can be generated automatically or semi-automatically, a streetscape data production cycle and a digital city production cycle are greatly shortened, and the building elevation extraction method based on the building outer contour lines and the laser point cloud has very high economic value and very high social value.

The invention discloses a pre-embedding construction method for a distribution box with rows of pipes, and a support device, and relates to a pre-embedding construction method for distribution pipes and a distribution box of a masonry wall in building engineering. The construction method comprises the following steps of: fixing the distribution box at a design position by using a temporary platform; installing rows of distribution pipes on the upper part of the distribution box; suspending the distribution box by using the installed distribution pipes, removing the temporary platform, and installing distribution pipes on the lower part of the distribution box to ensure that the distribution box is fixed in the vertical direction; constraining the rows of distribution pipes and the distribution box in the horizontal direction by using steel bars which stretch into the masonry wall; controlling the degree of the distribution box stretching out of the wall by using a formwork fixing system; and pouring concrete to firmly fix the distribution pipes and the distribution box so as to fulfill the aim of accurately installing the distribution box in an embedded mode. The device is provided with a transverse steel pipe component, an upper steel pipe component, a lower steel pipe component, a lower supporting plate, a left supporting plate, an upper supporting plate and a right supporting plate.

The invention relates to a high back pressure coupling large temperature difference heating supply system for an air cooling unit and an operation method, and belongs to the technical field of combined heat and power generation energy conservation. The high back pressure coupling large temperature difference heating supply system for the air cooling unit comprises a combined heat and power generation unit, a heating network origin station and a secondary heat exchanging station, the combined heat and power generation unit comprises a turbine, an air cooling island and a back pressure condenser, the heating network origin station comprises a heater for heating networks and a hydrophobic heat exchanger, and the secondary heat exchanging station comprises a hot water type absorbed type heat pump and a water-water heat exchanger. The back pressure condenser, the hydrophobic heat exchanger, the heater for the heating networks, the absorbed type heat pump and the water-water heat exchanger are sequentially mounted on a primary network water pipe loop, corresponding valves are opened or closed to realize primary network-water side switching connection in series and in parallel of the backpressure condenser and the hydrophobic heat exchanger and secondary network-water side switching connection in series and in parallel of the hot water type absorbed type heat pump and the water-waterheat exchanger. According to the high back pressure coupling large temperature difference heating supply system for the air cooling unit and the operation method, stepped warming and heating of primary network-water and secondary network-water is realized, the irreversible loss in the heat exchanging process is effectively reduced, and higher practical application value is achieved.

The invention relates to a condensing extraction back-pressure coupling steam extraction integrated system for thermoelectric unit power peak shaving and an operation method thereof. The condensing extraction back-pressure coupling steam extraction integrated system includes a power station boiler, a steam turbine high-pressure cylinder, a steam turbine medium-pressure cylinder, a steam turbine low-pressure cylinder, a generator, a condenser, a first temperature reducing and pressure reducing device, a pressure matching device, a second temperature reducing and pressure reducing device, a steam heat storage device and a temperature reducing device. Based on the energy cascade utilization principle, integrated design of different steam extraction modes is carried out, so that the thermoelectric decoupling operation capability of the large-scale thermoelectric unit is effectively improved, and the external heating demand is guaranteed; and in addition, while the steam extraction integration is carried out, the pressure matching device and the temperature reducing and pressure reducing devices are coupled to realize the operation of the unit heating under full working conditions and further reduce the loss of the physical working capacity of steam to achieve energy cascade utilization, especially novel condensing extraction back-pressure heating is coupled, so that the utilizationof high-parameter steam is effectively reduced, and full utilization of steam energy is achieved.

The invention discloses a heat supply network balance adjusting method by coupling thermal power with hydraulic power and a heat supply system which are used for centralized heat supply, and belongs to the technical field of centralized heat supply. The heat supply system involves a heat supply network initial station, a heat supply network circulating water pump, a heat supply network make-up pump, electric adjusting valves, an internet-of-things flowmeter, an internet-of-things temperature instrument, an internet-of-things pressure instrument and n heat stations. According to the method andsystem, the heat supply parameters of the design working condition are obtained through load prediction, the corresponding electric adjusting valves are adjusted according to the heat supply parameters of the design working condition, and the heat supply parameters of the actual operation working condition are obtained; then the actual values of the thermal power imbalance degree and the hydraulicpower imbalance degree are obtained through calculation, a constraint function is used for distinguishing the balance condition of thermal power and hydraulic power of the heat supply system, and correcting and adjusting are carried put; and therefore, the dynamic balance of heat supply network operation is achieved, the reliability and accuracy of hydraulic power adjustment of the heat supply system are improved, and the practical application value is high.

The invention provides a hard-particle powder for sintered body, which contains, by mass %, 2% to 3.5% of Si, 6% to 10% of Cr, 20% to 35% of Mo, 0.01% to 0.5% of REM, and the remainder being Co and unavoidable impurities. The invention further provides a sintered body obtained through a mixing step of mixing the above-mentioned hard-particle powder for sintered body with a pure iron powder and a graphite powder to obtain a powder mixture, a forming step of compacting the powder mixture to obtain a compact, and a sintering step of sintering the compact. The hard-particle powder according to the invention has the effect of giving a sintered body having improved wear resistance without substantially impairing powder characteristics and sintering characteristics. Additionally, the sintered body according to the invention has the effect of having excellent wear resistance.

The invention discloses a combined heat and power generation heat supply load prediction method based on multi-factor influences and a heat supply system, and belongs to the technical field of centralized heat supply. The heat supply system comprises a thermoelectric unit, a heat supply network initial station, a heat storage system, a heat supply network circulating water pump, a heat storage circulating pump, a heat release circulating pump, an electric adjusting valve, an Internet of Things flow meter, an Internet of Things temperature instrument, an Internet of Things pressure instrument and q heat supply stations, wherein q is larger than or equal to 2. According to the combined heat and power generation heat supply load prediction method based on the multi-factor influences and the heat supply system, influences of factors such as meteorological parameters, pipe network characteristics and building characteristics are comprehensively considered, so that a long-term heat load prediction model of a certain day in the future and a short-term heat load prediction model of real-time heat supply load adjustment are established, on one hand, the operation condition of a combined heat and power generation unit is reasonably arranged, and efficient adjustment of electric and heat loads of a heat source side unit is achieved; and on the other hand, accurate operation adjustment ofheat supply of the heat supply network side is achieved, and the heating requirements of heat users are effectively met, so that the problem of mismatching of electric and heat loads of the heat source side and the heat supply network side of the heat supply system is effectively solved, and accurate heat supply of the heat supply network side and efficient peak regulation of the heat source sideare achieved.

The invention relates to a steam extraction and heating integrated system for electric peak-load shaving of a combined cycle unit and an operation method of the steam extraction and heating integratedsystem. The steam extraction and heating integrated system comprises a gas turbine unit and a steam turbine unit, integrated design of different steam extraction modes is carried out based on the principle of gradient energy utilization, and thus the thermoelectric decoupling operation capacity of the combined cycle unit is effectively improved, and heating requirements of residents are met; in addition, hot water heat storage systems are simultaneously coupled in a heating system and a boiler water feeding system, so that cooperative matching of electric peak-load shaving and heating of thecombined cycle unit is achieved, and the electric peak-load shaving capacity of the combined cycle unit during operation under a pure-condensation condition is improved. By means of the steam extraction and heating integrated system, loss of working capacity in the heating process is effectively lowered while outward heating capacity of the combined cycle unit is deeply exerted. Especially currentsevere electric peak-load shaving policy requirements are met, the deep peak-load shaving capacity of a thermal power generating unit is achieved, the requirement of a power grid for unit peak-load shaving is truly met, and high practical application value is achieved.

The invention relates to a combined circulating device based on coupling of heat supply and electric power peak regulation and an operating method thereof, and belongs to the technical field of combined heat and power generation. The combined circulating device comprises a gas turbine unit and a steam turbine unit; based on the energy gradient utilization principle, integrated design of differentsteam extraction modes is conducted, the operating capacity of a thermal electrolysis coupler of a combined circulating unit is effectively improved, and the heating requirements of residents are ensured; and meanwhile, a steam heat storage system is coupled with the combined circulating unit, collaborative matching of electric power peak regulation and heat supply of the combined circulating unitis achieved, and moreover, the electric power peak regulation capacity of the combined circulating unit operating in the pure solidification working condition is improved. After the combined circulating device is applied, the working capacity loss in the heat supply process is effectively reduced while the external heat supply capacity of the combined circulating unit is deeply exploited, in addition, the current severe electric power peak regulation policy requirements are met, the deep peak regulation capacity of a thermal power generating unit is achieved, the requirement of a power grid for unit peak regulation is met, and the high practical application value is achieved.

Provided are a double-stranded nucleic acid and use thereof in ribonuclease detection, and a ribonuclease detection method and use thereof in tumor detection and / or diagnosis. Specifically, a double-stranded nucleic acid substrate comprises at least one ribonuclease sensitive site. The activity and content of the ribonuclease in a sample are detected by analyzing the degradation of the double-stranded nucleic acid substrate by the ribonuclease. Also provided are a ribonuclease detection kit and a tumor detection kit.

The invention relates to a heat supply and electric power peak regulation coupling system used for a gas-steam combined cycle unit and an operation method of the heat supply and electric power peak regulation coupling system, and belongs to the technical field of improvement of flexibility of thermoelectric units. The heat supply and electric power peak regulation coupling system comprises a gas turbine unit and a steam turbine unit. The gas turbine unit comprises a gas turbine gas compressor, a gas turbine combustion chamber, a gas turbine and a first generator. The steam turbine unit comprises a waste heat boiler, a steam turbine high-pressure cylinder, a steam turbine intermediate-pressure cylinder, a steam turbine low-pressure cylinder, a second generator, a condenser, a condensation water pump, a make-up pump, a shaft seal heater, a deaerator, a first temperature and pressure reduction device, an evaporation heat exchanger, a pressure matcher, a second temperature and pressure reduction device, a steam heat accumulator and a third temperature and pressure reduction device. By means of the heat supply and electric power peak regulation coupling system, the external heat supplycapacity of the combined cycle unit is deeply excavated, and meanwhile acting capacity losses in the heat supply process are effectively reduced; and the current rigorous electric power peak regulation policy requirement is met, and the deep peak regulation capacity of a thermal power generating unit is achieved.

The invention relates to a gas and steam combined cycle unit steam extraction integrated industrial heating supply system and an operating method thereof and belongs to the technical field of heat andpower co-generation. The gas and steam combined cycle unit steam extraction integrated industrial heating supply system comprises a gas turbine unit and a steam turbine unit. The gas turbine unit comprises a gas turbine gas compressor, a gas turbine combustion chamber, a gas turbine and a first power generator. The steam turbine unit comprises a waste heat boiler, a steam turbine high-pressure cylinder, a steam turbine intermediate-pressure cylinder, a steam turbine low-pressure cylinder, a second power generator, a condenser, a condensate water pump, a gland heater, a deaerator, a first temperature and pressure reducing device, a steam cooler, a pressure matcher, a second temperature and pressure reducing device and a water make-up pump. Through the gas and steam combined cycle unit steam extraction integrated industrial heating supply system, while a deep excavation combined cycle unit supplies heat outwards, and loss of the power capacity in the heating supply process is effectively reduced. Besides, the requirements of the current severe electric power peak regulation policy are met, the deep peak regulation capacity of a thermal power generating unit is improved, and the requirements of a power grid for unit peak regulation are met practically.

A ratchet wheel for a lashing apparatus in the mechanical technical field is provided as a lashing tool. It addresses the problem in a current lashing apparatus that the mechanical strength of the reel is relatively poor. The ratchet wheel of the present invention comprises a wheel body with ratchet teeth mounted on its outer edge. The wheel body has two shaft holes for the reel to pass through, and a supporting strip between the two shaft holes, which is fixed to the wheel body and protruded to one side of the wheel body. When assembling the ratchet wheel, the two supporting strips of the ratchet wheel are faced towards the inside, so that the distance between the two supporting strips is shortened and thereby the mechanical strength of the reel enhanced. There may be various ways to connect the supporting strips with the wheel body. The ratchet wheel of the present invention is characterized by enhanced distortion resistance of the reel and improved mechanical strength of the lashing apparatus. Furthermore, the lashing apparatus has significantly improved performance but with only a slight increase in the product cost, and it is safe and reliable with high use values.

The invention discloses a combined heat and power generation coupling heat supply load adjusting method and system and belongs to the technical field of centralized heat supply. A heat supply system comprises thermoelectric unit, a condenser, a cooling tower, a first station of a heat supply network, an absorption heat pump, a circulating water pump of the heat supply network, an electric adjusting valve, an Internet of things flowmeter, an Internet of things thermograph, an Internet of things pressure gauge and q heating stations, wherein q is greater than or equal 2. By considering influenceof factors such as meteorological parameters, pipeline characteristics, building characteristics and heat user characteristics comprehensively, a heat supply network heat load prediction model is established to predict a heat supply network heat load precisely. By combining a thermoelectric decoupling ability of the adsorption heat pump, on the one hand, the operating working condition of the thermoelectric unit is arranged reasonably to adjust electric and heat loads of units on a heat source side, and on the other hand, precise operation adjustment of heat supply on the heat supply networkside is achieved, so that the heating demand of the heat user is met effectively, and the combined heat and power generation coupling heat supply load adjusting method has relatively high actual application value.

The invention relates to a gas and steam combined cycle unit steam extraction integrated heating system and an operation method thereof, and belongs to the technical field of combined heat and power generation. The gas and steam combined cycle unit steam extraction integrated heating system comprises a gas turbine set and a steam turbine set, wherein the gas turbine set comprises a gas turbine compressor, a gas turbine combustion chamber, a gas turbine and a first power generator, and the steam turbine set comprises an exhaust-heat boiler, a steam turbine high-pressure cylinder, a steam turbine intermediate-pressure cylinder, a steam turbine low-pressure cylinder, a second power generator, a condenser, a condensation water pump, a gland heater, a deaerator, a first temperature reduction and pressure reduction device, a second temperature reduction and pressure reduction device, a third temperature reduction and pressure reduction device, acting equipment, power equipment, a heater fora heating network, a drainage heat exchanger and a circulating pump for the heating network. According to the gas and steam combined cycle unit steam extraction integrated heating system and the operation method thereof, on the basis of an energy gradient utilization principle, integrated design of different steam extraction modes is performed, so that the thermoelectric decoupling operation capability of the combined cycle unit is effectively improved, and the heating requirements of residents are guaranteed.

The invention relates to a combined cycle heat supply and power peak regulation coupling system based on energy cascade utilization and an operation method thereof. The combined cycle heat supply andpower peak regulation coupling system comprises a gas turbine unit and a steam turbine unit; The gas turbine unit comprises a gas turbine compressor, a gas turbine combustion chamber, a gas turbine and a first generator; the steam turbine unit comprises a waste heat boiler, a steam turbine high-pressure cylinder, a steam turbine low-pressure cylinder, a second generator, a condenser, a condensatewater pump, a shaft seal heater, a deaerator, a temperature and pressure reducing device, acting equipment, power equipment, a pressure matcher, a steam heat accumulator, a heat grid heater, a hydrophobic heat exchanger, a heat grid circulating pump, a water storage tank and a circulating water pump; according to the invention, different steam temperature and pressure reducing modes are utilized to provide required heat sources for external heating, an integrated design of a steam extraction system is carried out based on the principle of the energy cascade utilization, and a steam heat storage system is coupled, so that the thermoelectric decoupling operation capability of a 9E type combined cycle unit is improved when the external heating demand is met.

The present invention provides a work piece chuck of manipulator in the field of mechanical technology. The chuck comprises a chuck sleeve and an ejector pin set within the chuck sleeve. An elastic clamping element is provided at the front end of the chuck sleeve. The ejector pin could move between a first position and a second position along the axial direction of the chuck sleeve. When the ejector pin is in the first position, the outer circumference of the ejector pin extrudes the clamping element to distort and expand outward to form an expansion state. When the ejector pin is in the second position, the outer circumference of the ejector pin is out of contact with the clamping element to restore the clamping element. The chuck has a number of advantages including firm connection, high reliability and high use value.

The invention relates to a low-vacuum heating system coupled with a large-temperature-difference heat pump and an operation method of the heating system, and belongs to the technical field of combinedheat and power generation and energy conservation. The system includes a steam turbine, a condenser, a cooling tower, a heat exchanger of district heat supply network, a hydrophobic heat exchanger and a secondary heat exchanger station. The secondary heat exchanger station comprises a large-temperature-difference heat pump and a water-water heat exchanger. The heat exchanger of district heat supply network, the large-temperature-difference heat pump, the water-water heat exchanger, the hydrophobic heat exchanger and the condenser are sequentially installed on the loop of a primary network water supply and return pipe, and valves and bypasses are arranged at inlets and outlets of different devices. On the primary network side, the hydrophobic heat exchanger and the condenser are connectedin series or in parallel through the on-off states of the valves. On the secondary network side in a secondary heat exchange station, the large-temperature-difference heat pump and the water-water heat exchanger are connected in series or in parallel through the on-off states of the valves. The system and the method are based on the principle of energy cascade utilization, a coupling system is reasonably designed to achieve cascade heating of water in the district heat supply network, irreversible loss of the heat transfer process is reduced, and the system and the method have high practical application value.

The invention relates to a system for improving thermal power straight condensing unit flexibility and a running method of the system. As for a thermal power straight condensing unit, it is of great importance in excavating the unit peak regulation potential, and no technology of the class exists. The system comprises a boiler, a steam turbine, a condenser, a condensate pump, a deaerator, a feed pump, a main steam pipe, a cold reheat steam pipe and a hot reheat steam pipe. The system is characterized by further comprising a temperature and pressure reduction device A, a temperature and pressure reduction device B, a main steam bypass, a hot reheat steam bypass, a steam pipe branch A and a steam pipe branch B; and the two ends of the main steam bypass are connected to the main steam pipe and the cold reheat steam pipe, the temperature and pressure reduction device A is installed on the main steam bypass, and the temperature and pressure reduction device B is connected with the deaerator through the steam pipe branch A, is connected with the condenser through the steam pipe branch B, and is connected with the hot reheat steam pipe through the hot reheat steam bypass. The system is reasonable in design, and unit load peak regulation of the straight condensing unit can be achieved.

The invention discloses a method and device for realizing live broadcast of a 3D video of motion cameras. The method comprises the steps of carrying out video shooting through utilization of the two motion cameras according to the same visual angle and obtaining and measuring the distance between the two motion cameras; uploading the distance between the motion cameras and the shot videos to a server; synthesizing the videos shot by the two motion cameras by the server according to time stamps carried by the videos and the distance between the motion cameras, thereby obtaining the 3D video; and carrying out live broadcast on the 3D video by the server. According to the method and the device, the videos shot by the two motion cameras are synthesized according to the time stamps carried by the videos and the distance between the motion cameras, and the live broadcast is carried out on the obtained 3D video, so audiences are immersive in the live broadcast watching process, and the user experience and the application value of the motion cameras are improved.

A fan cover integrated with a heat dissipating fan having a power line and a power line connector is disclosed. The fan cover includes a body combined with and covered on a side of the heat dissipating fan, and a fixing mount disposed on an outside region of the body. The fixing mount has a clip unit for clipping to the power line connector of the heat dissipating fan, allowing the power line connector to be detachably attached to the fixing mount. Therefore, the heat dissipating fan is detachable form the frame of the server in single step and overcome the drawbacks of the prior art.

The invention provides a cobalt and molybdenum doped magnesium alloy electrode wire and a manufacturing method thereof. The electrode wire is a molybdenum alloy electrode wire for wire cutting, wherein the molybdenum alloy electrode wire for wire cutting is manufactured in the manner of adding a cobalt element and a molybdenum element to molybdenum dioxide powder and carrying out powder metallurgy and machining. The manufacturing method comprises the steps that the molybdenum dioxide powder is loaded in a blender mixer; a cobalt nitrate solution and a magnesium nitrate solution are mixed and then placed in a liquid adding device and are added into the blender mixer in a spray manner, and mixing is carried out while adding is carried out; after adding is finished, pure water is added to wash the liquid adding device, and washing liquid is added into the blender mixer; mixing and drying are carried out; the molybdenum dioxide powder doped with the cobalt element and the molybdenum element is taken out after being cooled to room temperature; and secondary reduction is carried out to manufacture doped molybdenum powder and the cobalt and molybdenum doped magnesium alloy electrode wire is manufactured in a machined manner through powder screening, mixing, blank pressing, intermediate-frequency sintering, rotary swaging, stringing, drawing and annealing. The high temperature performance, strength of extension, discharging efficiency and damage resistance of molybdenum wires for electrospark wire cutting are improved, and the application value of the electrode wire for wire cutting is increased.

The invention discloses a method for determining an implicit joint density threshold value for the generation of a slip-off effect in a rock test. The method comprises the following steps: (1) preparing samples with different implicit joint densities; (2) starting with the sample with minimum implicit joint density, measuring the gas permeability of the sample under the same confining pressure and different seepage pressures, recording the inlet gas pressure and the outlet gas pressure of a pressure chamber and taking an average value of the inlet gas pressure and the outlet gas pressure as average pressure; (3) drawing a change curve of the gas permeability of the sample along with the reciprocal of the average pressure and fitting the curve through a function; (4) if a fitting correlation coefficient is greater than 0.90, selecting the next sample of which the implicit joint density is greater than that of the sample and repeating the step; if the correlation coefficient is less than 0.90, the implicit joint density of the sample is the implicit joint density threshold value for the generation of the slip-off effect. The method disclosed by the invention has the benefit that the slip-off effect can be directly linked to the implicit joint density, so that the gas permeability measuring results of the samples with different implicit joint densities can be more directly and quickly evaluated.

The invention discloses a steam extraction power generation and heat supply system of coupling steam extraction and condensing backpressure heat supply and an operation method. The system comprises asteam turbine medium pressure cylinder, a steam turbine low pressure cylinder, a steam condenser, a radial turbo, a cooling device, a steam-water heat exchanger, a first water drain heat exchanger, afirst station heating network heater, a second water drain heat exchanger, a generator and various steam and water pipelines and valves connected with the steam turbine medium pressure cylinder, the steam turbine low pressure cylinder, the steam condenser, the radial turbo, the cooling device, the steam-water heat exchanger, the first water drain heat exchanger, the first station heating network heater, the second water drain heat exchanger and generator; a cooling steam pipeline is connected with the inlet pipe position of the steam turbine low pressure cylinder, and a cooling device and a regulating valve are arranged on the cooling steam pipeline; one part of steam extracted from the steam turbine medium pressure cylinder enters the first station heating network heater to supply heat, and the other part of the steam enters the radial turbo to apply work; drained water produced after heat exchange is performed on the steam through the steam-water heat exchanger and the first stationheating network heater enters into the two water drain heat exchangers to perform cascaded heating on part of heating network return water; and by changing the operation modes of the system in heatingseason and non-heating season, the high-efficiency operation of the system is realized. The system realizes cascaded heating of a heating network, and lowers irreversible losses in the heat exchangeprocess.

The invention provides a volume measurement device and device and a user terminal, and relates to the technical field of measurement. The method comprises the steps: obtaining a three-dimensional point cloud model of a to-be-measured object; constructing a test space for accommodating the three-dimensional point cloud model, wherein the volume of the test space is known; dividing the test space into a plurality of preset measurement bodies equally; obtaining the total number of preset measurement bodies which are located between the preset measurement body which is located at an outer side of the test space and serves as a seed point and the preset measurement body which is located at the edge of the three-dimensional point cloud model; and obtaining the volume of the to-be-measured object according to the total number, the volume of the preset measurement bodies and the volume of the test space. The method improves the test precision while the to-be-measured object is not damaged, and also can achieve the measurement of the volume of a to-be-measured object with a complex curved surface. The method is high in application value.