119 results about "Wall effect" patented technology

Lower resolution and clutter-prone two-tone CW radars can have the displayed images dramatically improved by three techniques involved in the subject invention. The three techniques involved are the stepping of each of the multiple radars for readings at multiple frequencies, weighting the results to compensate for wall-induced distortions and differential image processing. In one embodiment, weights for each frequency counteract the distortion produced by particular wall. For differential image processing, temporal snapshots of the images are subtracted one from the other such that the result is only due to moving objects, thus to provide a dramatic display of the presence and position of moving individuals behind a wall.

Permeable polymeric monolithic materials are prepared in a column casing. In one embodiment, the permeable polymeric monolithic materials are polymerized while pressure is applied through a piston having a smooth piston head in contact with the polymerization mixture. The pressure eliminates wall effect and changes the structure in the column. Similarly, some columns that have a tendency to swell in the presence of aqueous solutions and pressurized while the solution is applied to prevent swelling and wall effect. This procedure also changes the structure in the column. The size of the separation effective openings can be controlled by the amount of the pressure and pores eliminated. Uniformity in the direction flow is improved by controlling polymerization with radiation rather than with conducted heat.

The invention provides a novel high-temperature high-pressure explosion limit tester comprising a raw material gas supply apparatus, an explosion determination device, a vacuum generating device, and a controlling device. The explosion determination device is mainly composed of a pressure sensor, a temperature sensor, and an igniter. The explosion determination device is used for determining explosion limit, explosion pressure and explosion temperature of the gas or vapor. The vacuum generating device is used in vacuum pumping upon the explosion determination device. The controlling device is used for determining, controlling and collecting experimental data generated during the experiment. Compared with prior arts, the high-temperature high-pressure explosion limit tester provided by the invention has a temperature testing range of room temperature to 400 DEG C, which is higher than 200 DEG C which is a maximal temperature of instruments in existing standards; the tester provided by the invention has a pressure range of normal pressure to 2.2MPa, which is higher than 1.38MPa which is a maximal pressure of instruments in existing standards; and the tester provided by the invention has a test volume of 10L, which is larger than that of an existing tube-type explosion limit tester, such that a wall effect can be better reduced.

The present invention discloses a control method for coal mine insular coal pillar crossheading rock burst. According to the method, firstly, roadways of a coal mine insular coal pillar are dug and arranged on an upper crossheading, a lower crossheading and a coal face cut; treatments of drilling and blasting distressing are performed on inner side walls of the upper crossheading and the lower crossheading; then, a treatment of interval strong supporting is performed on outer side walls of goaf sides of the upper crossheading and the lower crossheading; finally, a treatment of grouting is applied on the inner side walls of the upper crossheading and the lower crossheading to reinforce the support, wherein the upper crossheading and the lower crossheading are subjected to the blasting distressing. With the present invention, the drilling and the blasting distressing are adopted, the ground pressure of the coal pillar is released, such that the coal body with the impact trend is transformed in the coal body with the weak impact trend; the strong supporting is performed for both side walls, such that the strength of the coal body from the coal wall of the roadway to the deep roadway is improved, the protection wall effect is provided for the roadway, and the safeties of the workers are protected.

A modular LED array light source comprises an assembly of a plurality of solid-state LED array modules. Modules are abutted to provide a large area, high intensity, and high-density array that provides substantially uniform irradiance. Preferably, in each module, a linear or rectangular array of groups of LED is provided in which the density of LED die in the array is higher at ends or edges of the modules abutting other modules, to provide improved uniformity of irradiance over the illuminated area between modules. Particular arrangements of clusters of LEDs are provided that reduce or overcome the discontinuity or dip in irradiance due to edge or wall effects caused by the spacing of LED die from edges of the substrate/packaging of each module. These arrangements are advantageous for hermetically sealed LED array modules, for example, which require a minimum wall thickness for an effective seal.

The invention discloses a foldable walling machine. The foldable walling machine comprises a base, an X-axis track, a Y-axis track, a clamping jaw, a driving device, a brick feeding mechanism and a detection and control system. The invention also discloses a method adopting the foldable walling machine to build a wall. By adopting the foldable walling machine, the contradiction among the working range, size and application efficiency can be solved. The device is reasonable in structure, can be folded or retracted when in movement or not in use and is small in floor area, convenient to move on floor or a working plane, the track and walling arm structure can be flexibly used according to the real situation, the comprehensive efficiency is high, the foldable walling machine is flexibly applicable to different walls in different sizes and different types; moreover, the method for utilizing the walling machine to build the wall is simple, good in walling effect and suitable of being popularized.

The invention discloses a storage system for supporting calculation in storage and a calculation method. The system comprises an SRAM array and m computing modules, the SRAM array comprises a row address decoding module and n rows and m columns of SRAM storage units, the row address decoding module comprises two groups of decoders; each calculation module comprises a Boolean logic calculation unitand a full-add calculation unit which are connected with each other, each column of SRAM storage units are connected with the Boolean logic calculation units through two read bit lines, the Boolean logic calculation units are connected with the full-add calculation units, and the full-add calculation units are connected in sequence. According to the invention, after data on two read word lines isread at the same time, Boolean operation and full-add operation are carried out, the function of in-memory calculation is realized, the data transmission between a CPU and a memory is reduced, and the time expenditure of memory access is reduced, so that the operation speed is greatly improved, the memory wall and power consumption wall effects are reduced, and the system and method can be widelyapplied to the technical field of integrated circuits.

The invention discloses a double-flapping-wing generating set. The double-flapping-wing generating set comprises a shell and a lead screw. The lead screw is parallel to the shell, and the two ends of the lead screw are movably connected with the shell. The upper part and the lower part of the lead screw are each movably connected with a transmission mechanism. Each transmission mechanism can slide vertically when the lead screw rotates. Each transmission mechanism is provided with a set of blades. The two blades in each set are coaxially arranged in the direction perpendicular to the axis of the lead screw and connected through a rotating shaft. The transmission mechanisms can drive the corresponding rotating shafts to rotate. In addition, a generating set body for generating power through rotation of the lead screw is arranged on any side of the shell. According to the generating set for collecting fluid kinetic energy through double-flapping-wing pitching-heaving motion, the two sets of blades in the generating set are symmetrically arranged side by side, the pitching motion phase difference between the two sets of blades is 180 degrees, the two sets of blades can be the end walls of each other by means of the arrangement, and the energy absorption efficiency and power of the generating set can be improved through the end wall effect.

The invention discloses a cavitation type ultrahigh pressure water hammer type water gun sprayer. Under the high pressure, a nozzle of the sprayer sprays out water hammer jet flow with cavitation proficiency. The sprayer comprises a sprayer cavity comprising an accordion cavity, a Helmholtz cavity and a conical nozzle outlet control section, wherein the accordion cavity and the Helmholtz cavity are axially through along the sprayer. A conical cavity transition section is formed between the accordion cavity and the Helmholtz cavity, high-speed fluid flows from the accordion cavity to a nozzle outlet to form water hammer flow with self-oscillation, and the water hammer flow produces vertex adhering wall effect at the nozzle outlet control section so that a cavitation phenomenon is induced at the nozzle outlet control section. The water jet flow sprayed out by the sprayer belongs to discontinuous cavitation water hammer flow, water attacking strength is in alternate tension with relaxation, alternating stress can be exerted on the surface of an attacked object, and the surface of the attacked object can be easily damaged or surrendered due to fatigue strength by means of the alternating stress and the cavitation effect. The cavitation type ultrahigh pressure water hammer type water gun sprayer is applied to occasions requiring rust removal, cleaning, scrabbing on the surface of concrete and the like.

The invention relates to a multi-pipe discharging device of a sinter shaft kiln type waste heat recovery system and relates to flow characteristics of sinter, heat exchange characteristics of the sinter and air, out-of-kiln manners of hot air, structural forms of kiln bodies, diameter and height parameters, kiln top material distributing equipment, bottom air distribution devices and the like. A multi-pipe type discharging technology is adopted and matched with air volume adjustment, a kiln wall effect and a center funnel effect are avoided, and the inherent defect that the adjusting range of an adjusting bar manner is very limited is effectively overcome. Due to the efficient cooperation of the discharging technology and the air distribution manner, the comprehensive effects of increasing the air temperature, reducing the air volume and the air resistance and eradicating red material accidents can be achieved.

The invention discloses an accurate proppant placement method for hydraulic fracturing of a multi-interlayer oil-gas reservoir. The accurate proppant placement method comprises the steps of firstly obtaining geological parameters and physical parameters of a fracturing interval according to logging data, and dividing the fracturing interval into different small fracturing transformation layers onthe basis; then, optimizing a perforation position according to fracture closing time, and determining the proppant densities of the different fracturing transformation layers in cooperation with field practice; by calculating the proppant settling velocity `affected by sand-carrying concentration and a fracture wall effect, designing the apparent viscosity of fracturing fluids in different smallfracturing transformation layers; and finally, calculating the pumping times of the sand-carrying liquid at different stages according to the thicknesses of different small fracturing transformation layers. According to the design parameters, a proppant can be all paved on a target production layer so that the proppant can be uniformly paved in the longitudinal direction of the production layer after fracture closing. The accurate proppant placement method is reliable in principle and strong in site operability and has a wide market prospect.

The invention discloses a steel pipe variable -aperture variable-wall roller, including base, feeding device, heating device, rolling device, and straightening device; power device; the rolling device includes at least three uniformly distributed rollers; after pushed by the feeding device, heated by the heating device, and rolled by the rolling device and straightened by the straightening device, whether the steel pipe is steel pipe with seam, waste steel pipe or finished steel pipe, all of them can be processed from blank steel pipes into seamless steel pipes according with use standard. By heating and roller inclined cutting thermal rolling, it effectively eliminates metal fatigue, recovers gold-phase structure, improves outside fineness, has obvious uniform wall effect, especially able to primary form small diameter very-thick wall steel pipe.

The invention discloses an underground leaching in-situ collection device with a plastic boundary. The underground leaching in-situ collection device comprises a leaching collection body and a leaching solution filtering and collection barrel, wherein the leaching collection body is a cylinder with an opening in the top and is formed by enclosing a waterproof soft thin film; an opening end of the leaching solution filtering and collection barrel is matched with a barrel cover and the barrel cover is in an inward concave form; the barrel cover is provided with a plurality of water filtering holes; the leaching solution filtering and collection barrel is arranged on the lower part of the leaching collection body and is connected with the bottom of the leaching collection body; the bottom of the leaching collection body connected with the leaching solution filtering and collection barrel is provided with through holes corresponding to the water filtering holes; the leaching solution filtering and collection barrel is internally provided with a liquid pumping pipe and an air ventilating pipe; the liquid pumping pipe extends to the upper part of the leaching collection body from the bottom of the leaching solution filtering and collection barrel; the air ventilating pipe extends to the upper part of the leaching collection body from the top of the leaching solution filtering and collection barrel. According to the underground leaching in-situ collection device, the elastic waterproof soft thin film is used as the leaching collection body, so that the pool wall effect caused by expansion with heat and contraction with cold can be effectively overcome.

The invention discloses a determination method for permeability coefficient of coarse-grained soil considering a side wall effect of a permeameter. The method comprises the following steps: firstly, through particle screening and particle density tests, measuring the particle size group content, the median particle size and the particle density of a coarse-grained soil sample, and calculating therepresentative particle size d of the sample; respectively obtaining the minimum pore ratio and the maximum pore ratio of the soil body by virtue of maximum and minimum dry density tests of the sample; measuring a permeability coefficient test value k' of the coarse-grained soil sample by adopting an indoor constant head permeability test of a small-size permeameter; then, calculating a plane poreratio correction coefficient xi and the angle alpha of an equal-diameter circular accumulation model under an actual pore ratio e; and finally, according to an expected boundary area rate lambda andan expected boundary pore ratio eb, obtaining a permeability coefficient determination value K which eliminates the influence of the side wall effect. The method is simple and convenient to operate, the permeability coefficient of the coarse-grained soil can be accurately measured by utilizing the indoor geotechnical test parameters of the small-size permeameter, the testing precision is high, andthe error is small.

The invention discloses a water burst emergency water plugging wall device and an application method thereof, and includes a water burst emergency water plugging wall device and an application method.The application method comprises: at the moment of water burst, the device responding immediately, a gas generator in an inflation wall firstly reacts rapidly, large amount of generated gas rapidly strutting the inflation wall, then a high-pressure water-injection pump rapidly injecting water to the inflation wall, and a water burst one-way valve on a water burst wall working face side making bursting water inject into the inflation wall, to make the inflation wall expand rapidly; when the inflation wall is horizontally abutted against with a roadway, high-strength filaments in the inflationwall being completely stretched to generate a powerful constraining force, to make the inflation wall only expand along a section of the roadway subsequently, continuing to inject water, a water plugging wall continuously extruding with the roadway, to generate high friction force, so as to achieve an emergency water plugging wall effect. When a working face is unsealed, through controlling a valve, hydrops plugged by the working face can be discharged according to water discharge capacity. The device is good in emergency water plugging effect, and is simple in process and high in efficiency.

An open pressure-adjustable submerged jetting water tunnel comprises a working water tank. The working water tank comprises a top pressure adjustment cavity. In the working water tank, the space below the pressure adjustment cavity is divided into a test area and a pressure adjustment section. The lower part of the pressure adjustment cavity is communicated with the test area and the pressure adjustment section. The sidewall of the test area is connected with an upstream water source through a flow channel. The flow channel directly faces a test object installed in the test area, and the flow channel is equipped with a velocity adjustment valve. The pressure adjustment section is beyond the working water tank downward, and extends downward to form a pressure adjustment vertical shaft which is communicated with a downstream water pool. The test area and the pressure adjustment vertical shaft are each provided with a lifting overflow dam. The pressure adjustment cavity is provided with a pressure adjustment system. The invention further discloses a method for the open water tunnel to form a pressure-adjustable and velocity-adjustable flow field, including the steps of setting a submerged jetting test area, driving the water flow by gravity, adjusting the pressure through the pressure adjustment system, adjusting the velocity through the velocity adjustment valve, and draining water through the pressure adjustment vertical shaft. The wall effect is eliminated. A stable and quality flow field can be formed through pressure and velocity adjustment.

The invention provides a cable-type intelligent airworthiness instrument device, which includes two height-adjustable pillars arranged on both sides of the water area, hoists respectively installed on the two pillars, a cable arranged between the two hoists, and a The lower end of the cable is provided with a support, the lower end of the support is provided with a ship model, and the support is provided with a measuring device. Since the cable-type intelligent airworthiness instrument device of the present invention carries out relevant hydrodynamic performance tests in real waters, compared with pool tests, it avoids the use of equipment such as pool aircraft and wave generators with high construction costs, and does not need to consider At the same time, the device has reasonable structure, easy operation, lower cost, more accurate experimental results and better test performance, which is of great significance to this type of test and has a very broad application prospect.

The invention belongs to the field of building construction, and provides a method for renovating an external wall of an existing building. The method at least includes the external wall effect constructing step, the window side filler and waterproofing step and the parapet external corner treatment step. By means of the renovating method, the existing building can continue to be used for a longertime, and building energy conservation is realized. Moreover, the external wall renovated through the method has a smooth base layer and a good appearance effect. The problem that the junctures of different materials at window frame joints are prone to cracks is solved, and therefore the water seepage and water leakage potential hazards in the later period are eradicated, the water leakage of window sides in the later period can be effectively avoided, and the complaints of owners in the later period and the cost for property maintenance are reduced.

The invention relates to a cooling flame low nitrogen combustion device. The device comprises a premixed gas inlet and a combustion chamber, wherein a first heat exchange tube assembly and an igniterin the flow direction of premixed gas are successively arranged in the combustion chamber; the first heat exchange tube assembly is composed of a plurality of outer hexagonal tubes arranged in parallel, and gaps are formed between the adjacent outer hexagonal tubes to allow the premixed gas to pass through; and the position of the igniter opposite to the first heat exchange tube assembly is set insuch a way that the igniter can directly ignite the premixed gas passing through the gaps. Cooling fluid circulates in the outer hexagonal tubes, and the temperature of a flame is reduced duo to thecold wall effect of the cooling fluid, so that the formation of nitrogen oxides is inhibited; and at the same time, when the flame propagation speed is greater than the air flow speed, and the flame returns into the gaps between the outer hexagonal tubes, the energy of the flame becomes smaller and smaller under the cooling effect of the cooling fluid until the flame goes out in the gaps, so thatthe explosion caused by the tempering phenomenon is avoided.

The invention discloses a dual-fire-proof and dual-explosion-proof blocking device and method for a gas pipeline, and relates to the field of fire prevention and explosion prevention of gas pipelines. The dual-fire-proof and dual-explosion-proof blocking device structurally comprises the gas pipeline, flame-stopping pipelines, flame sensors, a wire, a controller, electromagnets, electromagnetic coils, a blocking baffle, a blocking valve and a baffle groove. When a fire or an explosion happens to the gas pipeline, the flame sensors detect flame signals and then transmit the flame signals to the controller through the wire, the controller controls a power supply to stop supplying power to the electromagnetic coil on the left side, and the blocking baffle can be opened under the effect of gravity at the moment to stop transmission of gas in the gas pipeline; and even if the blocking baffle cannot operate normally due to faults, when flames of the fire or the explosion pass through the flame-stopping pipelines on the left side and the right side, spreading of the flames can be prevented under the wall effect of small pipes in the flame-stopping pipelines, and accordingly dual-fire-proof and dual-explosion-proof functions are achieved. Meanwhile, the dual-fire-proof and dual-explosion-proof blocking device also has the flame return preventing capacity.