39results about How to "Simplify red tape" patented technology

The invention belongs to natural enemy insect predacious stink bug raising technology field, more specifically a method for raising natural enemy insect southern minute pirate bug indoor in great deal and a raising box. The raising method comprises the steps of southern minute pirate bug adult and nymph raising; the existing southern minute pirate bug raising method is improved based on the biological characteristics of the southern minute pirate bug; and a method for raising the predacious natural enemy minute pirate bug in different states indoor is provided. According to the raising method, a suitable oviposition environment for the minute pirate bug is provided and the male and female pairing number can be increased; the cannibalism among the nymph and non-natural death are effectively reduced; the nymph survival rate and the imago obtaining rate are raised; and the tedious procedure of individual test tube raising, replacing and cleaning is simplified. According to the invention, the survival rate in each state is high; the procedure is simplified; the demand for raising the southern minute pirate bug indoor in great deal is satisfied; the enough insect source for deep indoor research is provided; at the same time, the key technology support for predacious stink bug propagation and raising and application in agricultural biological control are provided.

The invention discloses a method of measuring component contents in fluorite by applying an X fluorescence powder tablet pressing method. The method comprises the following steps of: (1) pressing a fluorite standard sample and an adhesive into a group of standard sample pressed tablets with proper CaF2 gradient contents; (2) preparing a sample to be tested and the adhesive into a sample pressed tablet to be tested; (3) analyzing the standard sample pressed tablet by using an X fluorescence spectrometer and acquiring a linear regression analysis curve by enhancing absorption and deducting spectral line overlapping interference after the analysis is finished, then selecting and using the working curve to measure the sample pressed tablet to be tested, and calculating the contents of various components of the fluorite according to correspondence of analyzed spectral line intensity and concentration; and (4) pressing the standard sample pressed tablet and the sample pressed tablet to be tested by uniformly mixing and grinding the fluorite standard sample as well as the fluorite sample to be tested and the adhesive respectively, sieving through a 300-mesh screen and finally pressing into tablets in a tablet press. The method is quick and accurate, the check cost is reduced, and the check efficiency is greatly increased.

The invention belongs to the technical field of medical instruments, and relates to a disposable soft connecting band collection container and an anti-freezing vacuum blood taking needle of a bleeding opening. The disposable soft connecting band collection container is formed in the following mode that: a biological product anticoagulant coating layer is arranged on an inner cavity wall of a circular connector; one end of the connector is provided with a blood taking plastic duct; a vacuum valve is placed on the plastic duct; the other end of the plastic duct is provided with the circular connector; the inner cavity wall of the circular connector is provided with the biological product anticoagulant coating layer; one end of the connector is provided with a venous blood taking needle, while the other end is provided with a blood collection sample bottle needle; the blood collection sample bottle needle is connected with a blood collection sample bottle cap; the blood collection sample bottle cap is connected with a rubber plug; the rubber plug is connected with a blood collection sample bottle; and one side on the blood collection sample bottle close to the blood collection sample bottle cap is provided with a secondary bleeding opening. The disposable soft connecting band collection container and the anti-freezing vacuum blood taking needle of the bleeding opening can ensure that a blood sample generates no cruor and hemolysis so as to ensure the accuracy of the test result. The blood dosage during the test can be controlled flexibly so as to ensure repeated tests at any time or the addition of new testing items.

The invention discloses an efficient genetic transformation and rapid identification method for cabbage type rapes. The genetic transformation method for cabbage type rapes comprises the following steps: (1) cultivation of sterile explant; (2) preparation of a target carrier; (3) preparation of agrobacterium conversion liquid; (4) co-cultivation of agrobacterium and hypocotyledonary axis; (5) induction of explant dedifferentiation to form callus; (6) induction of callus dedifferentiation to form buds; (7) transgenic positive selecting; (8) rooting culture; and (9) plantlet hardening-off and transplanting. Integral process settings of the genetic transformation method, parameter conditions of key steps, and the like are improved and are further preferably selected, so that cabbage type rapetransgenic seedlings can be efficiently and quickly obtained through effective selecting means in comparison with the prior art. A DsRed gene is inserted into a carrier containing a target gene, so that the target carrier with DsRed is transferred into agrobacterium strain, and therefore, transgenic positive screening can be quickly and efficiently performed by observing color of the hypocotyledonary axis.

The invention discloses a herbicide-resistance-based rape hybrid seed producing method and applications thereof, and relates to the field of plant seed production. The method includes (1) introducing a wide-spectrum type herbicide-resistant gene into a rape male parent line to obtain a herbicide-resistant rape male parent line that is an imidazolidinone-resistant line 12WH381 or a glufosinate-resistant line Z7B10, (2) pollinating a female parent that is sterile after a chemical androcidal action by utilizing pollen of the herbicide-resistant rape male parent line, and harvesting hybrid seeds from male parent plants, and (3) coating the hybrid seeds with a herbicide, or spraying a corresponding herbicide to the hybrid seeds when the hybrid seeds are planted to remove false hybrid seeds at the same time of removing weeds so as to obtain high-purity rape hybrid seeds or group. The applications include (1) hybrid seed production for rape, (2) improvement on rape three-line seed production methods at present, (3) improvement on rape nucleus-sterility two-line seed production methods at present and (4) improvement on rape chemical androcidal seed production systems at present.

The invention belongs to the technical field of insect feeding and particularly discloses a method for feeding a large number of laboratory test populations of Opisina arenosella Walkers. The method is an improvement on an existing method for feeding the Opisina arenosella Walkers according to mating and oviposition characteristics of the Opisina arenosella Walkers. Mating space is enlarged, and the number of matched pairs of male and female Opisina arenosella Walkers is increased, so that female Opisina arenosella Walkers are stimulated to oviposit. In addition, the number of places where the female Opisina arenosella Walkers can oviposit is increased, the oviposition area is enlarged, and the survival rate of ova is increased. Tedious procedures of collecting ova through independent test tubes and leaf replacement during larva feeding are simplified, workload is decreased greatly, and the large number of standard test populations of Opisina arenosella Walkers with a high survival rate and simplified procedures can be obtained truly.

The invention discloses an evaluation method and system, a computer device and a computer readable storage medium. After order transaction of a customer is completed, a two-dimensional code used for evaluating an order is generated on the basis of the order and is sent to a terminal of the customer, the account of the customer is accessed and an evaluation interface of the order is displayed on the terminal of the customer when an entry instruction sent after a terminal parsed two-dimensional code is received, the evaluation interface includes an optimum evaluation item and / or a worst evaluation item, and evaluation information of the customer on the order is acquired according to the received evaluation instruction. Complicated procedures of an existing evaluation system can be simplified, the two-dimensional code used for evaluating the order is pushed to a customer terminal number, simpleness in operation is achieved, and customer attention is easily drawn; in conclusion, after the order transaction of the customer is competed, the customer is timely guided to make evaluation, and operability of the evaluation system and user experience are improved.

The invention discloses a method for evaluating efficiency of subway transfer station facilities. The method comprises the steps that information of a transfer station is acquired for collecting planelayout data of the subway transfer station to obtain transfer lines of the transfer station among different subway lines; efficiency evaluation indexes of the transfer station facilities are calculated, and index calculation values are obtained according to various index computational formulas; nondimensionalization is carried out on the evaluation indexes, wherein nondimensionalization processing is carried out on various indexes to obtain evaluation values within a same interval so that impacts caused by different index units and different order of magnitudes are eliminated; comprehensive evaluation is carried out on the efficiency of the transfer station facilities, the evaluation index weight is adopted to calculate a comprehensive evaluation value, thereby judging the efficiency of the transfer station facilities and giving reference suggestions. According to the method for evaluating the efficiency of the subway transfer station facilities, a set of systematized, quantitative and convenient computational method for evaluating the efficiency of the subway transfer station facilities is provided, and the method is applied to the facility efficiency evaluation of all subway transfer stations.

The invention belongs to the technical field of medical instruments, and particularly relates to a disposable hard connecting band collection container and an anti-freezing vacuum blood taking needle of a bleeding opening. The disposable hard connecting band collection container is formed in the following mode that: an anticoagulant coating layer is arranged on an inner cavity wall of a circular connector; one end of the connector is provided with a venous blood taking needle; the rear part of the connector is provided with a vacuum valve; the other end of the connector is provided with the blood collection sample bottle needle; the blood collection sample bottle needle is connected with a blood collection sample bottle cap; the blood collection sample bottle cap is connected with a rubber plug; the rubber plug is connected with a blood collection sample bottle; and one side on the blood collection sample bottle close to the blood collection sample bottle cap is provided with one secondary bleeding opening. The disposable hard connecting band collection container and the anti-freezing vacuum blood taking needle of the bleeding opening have the advantages that: the anticoagulant coating layer is added on the basis of the conventional hard connection type blood taking needle so that blood flowing out of a body can contact an anticoagulant; a blood sample is ensured to generate no cruor and hemolysis so as to ensure the accuracy of the test result; and the secondary bleeding opening is added so that a clinical inspector can flexibly control the blood dosage during the test to ensure repeated tests at any time or add new testing items.

The invention relates to a combined leakage stoppage mat. The combined leakage stoppage mat is characterized in that the combined leakage stoppage mat comprises a leakage stoppage cushion, a leakage stoppage base plate and an end cover. A stepped camshaft is arranged on the inner side of the leakage stoppage base plate, and the cross section of the stepped camshaft is in an inverted-T shape. A round hole is formed in the center of the leakage stoppage base plate. A round hole is formed in the center of the leakage stoppage cushion. The leakage stoppage cushion is arranged on the camshaft of the leakage stoppage base plate in a penetrating mode. The combined leakage stoppage mat is formed by the leakage stoppage cushion, the leakage stoppage base plate and the end cover. The combined leakage stoppage mat has the beneficial effects that the leakage stoppage cushion and the leakage stoppage base plate are combined for use, so that the complex process that a leakage stoppage cushion and a board are temporarily combined for leakage stoppage is simplified; in addition, the leakage stoppage cushion can also be disassembled quite conveniently to be applied to other leakage stoppage occasions, and the applicability is improved; and the combined leakage stoppage mat can be used for blocking a small hole of a inward folded edge or an outward folded edge and can be used in cooperation with the auxiliary appliances such as a movable screw frame, a telescopic supporting column and a rib supporting frame, and the application occasions are widened.

The invention provides a method for detecting two hormones including progesterone and oestrone in placenta. The method comprises the following steps of: performing spectrum acquisition on the oestrone, the progesterone and the placenta by using a Fourier infrared spectrometer to obtain absorption peak frequencies of two standard substances corresponding to the placenta; setting different concentrations of placenta, collecting far infrared and terahertz waveband spectra of the placenta with different concentrations, and detecting the contents of estrone and progesterone hormones corresponding to the placenta with different concentrations by using a high performance liquid chromatography; establishing a prediction model through a partial least squares method according to the absorption peakareas of the absorption frequencies of the two hormones corresponding to the placentas with different concentrations and the contents of the two hormones corresponding to the placentas with differentconcentrations in the solution, so that the content of progesterone and estrone hormones in the placenta solution to be detected can be obtained only by detecting the absorption spectrum of placenta in far infrared and terahertz frequency bands and calculating the area of the absorption peak. Compared with the traditional detection means, the method has the advantages that the detection complexityis greatly reduced, the time is saved, and the cost is very low.

The invention relates to a detection method of an airborne relay. A detection instrument is arranged and includes a detection panel, a signal collection module and a color display device, wherein the signal collection module and the color display device are connected with a power supply. A plurality of groups of parallel signal collection ports of the signal collection module, a plurality of groups of corresponding signal lamps, a liquid crystal display screen of the color display device, a switch of the power supply, a voltage adjusting knob of the power supply, and a series relay testing switch are arranged on the detection panel of the detection instrument. A contact and a coil of an airborne relay are connected with the signal collection ports by external leads. When the power switch is connected, the voltage adjusting knob of the power supply is adjusted to a requirement voltage; the relay testing switch is connected; and then corresponding parameters of the signal lamps and the liquid crystal display screen are observed.

The invention discloses a method for detecting beta-carotene, astaxanthin and starch in haematococcus pluvialis under nitrogen stress. The method comprises the following steps: S1, obtaining terahertz and far infrared band spectrograms under a haematococcus pluvialis stress environment by using a Fourier infrared spectrometer; S2, obtaining spectrums of beta-carotene, astaxanthin and starch standard substances by using the Fourier infrared spectrometer, and comparing the spectrums with the light obtained in the step S1 under the haematococcus pluvialis stress environment; S3, acquiring content change information of different substances in haematococcus pluvialis in the nitrogen stress environment multiple rounds to prepare a plurality of standard samples; S4, respectively detecting a spectrogram of the haematococcus pluvialis under nitrogen stress and a spectrogram of a metabolite of the haematococcus pluvialis under nitrogen stress by using the standard samples; and S5, establishing a correlation model based on the absorbance value at the characteristic peak position and the corresponding substance component. According to the invention, the problems that the conventional physical and chemical methods have destructiveness in pretreatment, and the physical and chemical methods are difficult to realize synchronous real-time monitoring of various metabolites are solved.

The invention belongs to the technical field of medical instruments, and relates to a disposable soft connecting band collection container and an anti-freezing vacuum blood taking needle of a bleeding opening. The disposable soft connecting band collection container is formed in the following mode that: a biological product anticoagulant coating layer is arranged on an inner cavity wall of a circular connector; one end of the connector is provided with a blood taking plastic duct; a vacuum valve is placed on the plastic duct; the other end of the plastic duct is provided with the circular connector; the inner cavity wall of the circular connector is provided with the biological product anticoagulant coating layer; one end of the connector is provided with a venous blood taking needle, while the other end is provided with a blood collection sample bottle needle; the blood collection sample bottle needle is connected with a blood collection sample bottle cap; the blood collection samplebottle cap is connected with a rubber plug; the rubber plug is connected with a blood collection sample bottle; and one side on the blood collection sample bottle close to the blood collection samplebottle cap is provided with a secondary bleeding opening. The disposable soft connecting band collection container and the anti-freezing vacuum blood taking needle of the bleeding opening can ensure that a blood sample generates no cruor and hemolysis so as to ensure the accuracy of the test result. The blood dosage during the test can be controlled flexibly so as to ensure repeated tests at any time or the addition of new testing items.

The invention provides a ground-moisture accessed multifunctional basin device comprising a basin body, an adjustable supporting pipe column, a water storage device, an adjustable water-soil separation plate, a water guiding bar and moisturizing matrix. Ventilating holes are formed in the bottom of the basin body; the adjustable supporting pipe column is arranged on the internal bottom of the basin body; the water storage device is mounted on the top of the adjustable supporting pipe column; the adjustable water-soil separation plate is arranged on the top of the water storage device; the moisturizing matrix is placed on the adjustable water-soil separation plate; and the water guiding bar is arranged on the adjustable water-soil separation plate. With the above structure, the ground-moisture accessed multifunctional basin device can be cooperated with flower pots of different material or types and assembled on the internal bottom or the external bottom of the flower pot, so ground moisture can be produced; the basin device uses less soil and water, saves time and efforts and requires less care of people; and the basin device can fundamentally solves difficulties of complicated care, difficult transplantation, short moisturizing period, water loss, root burn due to fertilizer application and root rot due to water accumulation during flower culturing in flower pots in the traditional structures.

The invention relates to a rotary weeding device based on dentate knives. The rotary weeding device based on the dentate knives comprises a rack [1], wherein a motor [2] and rotary blades [3] are arranged on the rack [1]; knife edges are dentate, so as to effectively reduce the earth entering resistance to the knife edges; the motor [2] is used for driving the rotary blades [3] to mow rotationally, so as to increase the efficiency of mowing, hacking and ploughing; the distance among the rotary blades [3] can be adjusted, so as to adapt to weeds of different variety; the rotary blades [3] are generally made from mixed-rolled steel; a collection basket [4] is arranged so as to accommodate mown grass; a sensing device [5] is arranged in the basket [4], and prompting information is sent out when leaves in the basket is about to full; and the rotary weeding device is characterized in that an information prompting mode is sound or LED (Light Emitting Diode) light display. According to the rotary weeding device based on the dentate knives, the cultivation efficiency of weeding and the work efficiency of labor can be increased, tedious procedures are simplified, convenience is provided for users, and human and financial resources are saved.

The invention provides a clamp and a device for composite connection of electron beam welding and laser additive manufacturing. The clamp comprises a first bottom plate, a second bottom plate and a plurality of supporting pieces arranged between the first bottom plate and the second bottom plate, and the first bottom plate, the second bottom plate and the supporting pieces define a containing space; the two opposite ends of each supporting piece are detachably connected with the first bottom plate and the second bottom plate respectively, the relative distance between the first bottom plate and the second bottom plate can be adjusted, and the relative position of every two adjacent supporting pieces can be adjusted; a plurality of positioning parts are correspondingly arranged on the first bottom plate and the second bottom plate respectively, so that a special clamp does not need to be replaced during electron beam welding or laser additive manufacturing, procedures do not need to be reset during machining after a forming surface is turned over, heat treatment can be carried out along with a sample, frequent clamp mounting and dismounting before and after electron beam welding and subsequent additive manufacturing are reduced, and the working efficiency in the composite connection process is greatly improved.

The invention discloses genetically engineered bacteria and application thereof to preparation of rebaudioside A. The genetically engineered bacteria capable of producing stevia rebaudiana glycosyl transferase UGT76G1 and UDP-glucose pyrophosphorylase UGPase are obtained through construction, and perform overexpression on the UDP-glucose pyrophosphorylase UGPase on the basis of performing constitutive expression on recombinant bacteria of the stevia rebaudiana glycosyl transferase UGT to increase the glycosyl donor quantity of glycosylation reaction. A whole-cell catalytic reaction system is established, and stevioside is converted into the rebaudioside A. The dosage concentration of the bacteria is 1 to 10 g / L, the dosage of glucose is 20 to 120 g / L and the dosage of the substrate stevioside is 1 to 20 g / L. In the catalytic reaction process, a cell catalyst is subjected to surfactant treatment, the cell permeability is improved and the yield of the rebaudioside A is greatly increased. A synthetic route of intracellular UDPG is utilized, so the glycosyl donor quantity of the intracellular UDPG is increased, additional addition is avoided and regeneration cycle is realized; and cultivation of yeast and expression of recombinase are conducted simultaneously, so the cycle of the cultivation of the recombinant bacterial and the expression of the recombinase is shortened.

The invention provides a fan. The problem that the assembly of a fan in the prior art is time-wasting and inconvenient is solved. The fan includes a motor, two frames, an impeller and a housing assembly. The two frames are coupled with an outer periphery of the motor and are engaged with each other by way of fastening. Each of the two frames includes one groove. The impeller is connected to the motor and is driven to rotate by the motor. The housing assembly houses the impeller and includes first and second housing parts. The first and second housing parts are engaged with each other by way of fastening. A protruding lip is provided on one of two end faces of the first housing part which is relatively adjacent to the motor. Another protruding lip is provided on one of two end faces of the second housing part which is relatively adjacent to the motor. The protruding lip and the other protruding lip are engaged with the grooves of the two frames.

The invention discloses a device and method for testing the density of high-temperature and high-pressure cement paste. The testing device comprises a sealed container, and a cement paste injection device, a pressurizing device, a heating device and a detection device which are respectively connected with the sealed container, and the sealed container is provided with a first pressure monitoring device; the cement paste injection device comprises a cement paste storage tank and a cement paste injection pump which are connected, the output end of the cement paste injection pump is connected with the sealed container through a first pipeline, and a first valve is arranged on the first pipeline; the pressurizing device comprises an air inlet pump and an air storage bottle which are connected, an air outlet of the air storage bottle is communicated with the sealed container through a second pipeline, and a second pressure monitoring device and a second valve are sequentially arranged on the second pipeline; and the detection device comprises a volume measuring instrument and a weight measuring instrument. According to the invention, the density of cement paste can be measured more accuratelyunder the stratum condition, and technical support is provided for field construction of an oil field.

The invention provides a mechanical picking device for honeysuckle. The device comprises a frame [1], wherein the front end of the frame is provided with two rolls [2]; a pipeline [3] is arranged at the rear end of the rolls; and the middle section of the pipeline is provided with an electric motor [4] and a basket body [5]. When the device is in use, the rolls [2] rotate and the honeysuckle is rolled and broken, and the broken honeysuckle is absorbed into the basket body through the pipeline; the distance between the rolls can be adjusted so as to fit picking of the honeysuckle with different sizes; the rolls [2] are generally a plastic material, and the surfaces of the rolls are provided with shallow lines; a protection cover is arranged on the rolls [2] and used for prevent honeysuckle from loss; and an induction unit [6] is arranged inside the basket body [5], and sends a prompt message when the basket body is filled with the honeysuckle, wherein prompt message sending is in a voice or LED light display manner. The mechanical picking device for the honeysuckle can replace manual operation, reduces picking processes, simplifies complicated procedures, supplies convenience for users, and saves labor and financial resources.

The invention discloses genetically engineered bacteria and application thereof to preparation of rebaudioside A. The genetically engineered bacteria capable of producing stevia rebaudiana glycosyl transferase UGT76G1 and UDP-glucose pyrophosphorylase UGPase are obtained through construction, and perform overexpression on the UDP-glucose pyrophosphorylase UGPase on the basis of performing constitutive expression on recombinant bacteria of the stevia rebaudiana glycosyl transferase UGT to increase the glycosyl donor quantity of glycosylation reaction. A whole-cell catalytic reaction system is established, and stevioside is converted into the rebaudioside A. The dosage concentration of the bacteria is 1 to 10 g / L, the dosage of glucose is 20 to 120 g / L and the dosage of the substrate stevioside is 1 to 20 g / L. In the catalytic reaction process, a cell catalyst is subjected to surfactant treatment, the cell permeability is improved and the yield of the rebaudioside A is greatly increased. A synthetic route of intracellular UDPG is utilized, so the glycosyl donor quantity of the intracellular UDPG is increased, additional addition is avoided and regeneration cycle is realized; and cultivation of yeast and expression of recombinase are conducted simultaneously, so the cycle of the cultivation of the recombinant bacterial and the expression of the recombinase is shortened.

A production method of a water culture bed set includes covering the inner surface of a water bed with a film material, shaping the film material to form an isolation film, and arranging a planting plate on the side wall of the water bed to form an accommodating space. The invention further discloses the water culture bed set.

The invention discloses a hydraulic mechanism oil level monitoring device capable of guaranteeing timely finding or eliminating of inner leakage and pressure losses of a hydraulic mechanism, improvingcircuit breaker running safety stability and guaranteeing reliable power supply of a power grid. The hydraulic mechanism oil level monitoring device comprises an oil level sensor used for detecting and feeding back liquid level information, an indicator lamp for giving an alarm when the oil level is reduced, a one-way check valve for conducting a filter assembly and an oil tank, a pipeline for communicating various oil paths, and a filter assembly for impurity oil filtration. The oil level sensor is fixed to the inner wall of the oil tank, and 0-190 Ohm linear resistance is output according to the oil level. An analog-digital conversion unit is further included and comprises a bleeder circuit and an analog-digital converter, the analog-digital conversion unit converts the resistance output by the oil level sensor into voltage signals, and then the voltage signals are converted into digital signals to be received by a data processing unit. A data processing and control unit and a datacommunication unit are further included.

The invention provides a folding cabinet. Through the combination of a unique structure of an insertion-groove type picture frame and related components on the folding cabinet, the manufacturing process of a wall-mounted folding cabinet (2014201902130) is simplified without using compression screws and adhesive tape to fix a frame back plate, and meanwhile, the unique structure of the insertion-groove type picture frame can make the back plate of the picture frame easy to disassemble and pictures of a decorative painting convenient to replace; multiple pictures are arranged in one decorative painting and can be replaced at any time; by using the insertion-groove type picture frame and the wall-mounted folding cabinet in a combined mode, the production efficiency of the wall-mounted foldingcabinet can be improved, and the folding effect of the wall-mounted folding cabinet is improved; adhesive paste is arranged on a folding inner wall plate, and the folding cabinet can be convenientlyinstalled without any tool by means of an adhesive type installation method; a rod hook and a multifunctional Bluetooth speaker are additionally arranged on the existing folding cabinet, so that the folding cabinet not only has the storage and decoration functions but also has the use functions of object placement on the hook, music playing, phone call answering through Bluetooth and the like, themanufacturing efficiency of the wall-mounted folding cabinet (2014201902130) is higher, and the folding cabinet is more practical during use.

The invention provides a calculation method, an experiment method and an experiment device for a V-shaped cutting groove tip stress intensity factor under pure shear loading, and the calculation method is based on a caustic method and comprises the steps: 1, selecting a plane to-be-measured object with a V-shaped cutting groove, and building an optical mapping relation between the plane of the to-be-measured object and a reference plane; 2, establishing a V-shaped cutting groove tip stress field expression; 3, establishing a relational expression between the initial curve radius r0 of a caustic and a stress intensity factor KII; 4, determining a caustic mapping equation of the V-shaped cutting groove under pure shearing loading; 5, establishing a relational expression between the characteristic length Dmax and the initial curve radius r0 of the caustic; and 6, determining the V-shaped cutting groove tip stress intensity factor KII under pure shear loading. The calculation method of theV-shaped cutting groove tip stress intensity factor KII under pure shear loading is obtained through research, and a new way is provided for obtaining the V-shaped cutting groove tip stress intensityfactor. The method has good precision and numerical stability.

The invention relates to a water circulating system for wall-hung plant cultivation. The water circulating system comprises a wall plate [1], wherein an S-shaped pipe [2] is arranged on the wall plate, and switching valves [3] are arranged on the pipe [2] equidistantly; a control panel [4] is used for controlling the switching of the switching valves [3]; a boosting water pump [5] and a water tank [6] are arranged on the back of the wall plate, the boosting water pump [5] is used for pumping water into the S-shaped pipe [2], and the water circularly enters the water tank [6] so as to achieve a water circulation system for plant cultivation; the control switches [3] are arranged and are controlled by the control panel [4]; the water circulation system is arranged so as to achieve the cyclic utilization of the water; a sensing device [7] is arranged on the S-shaped pipe [2], and prompting information is sent out when the pipe is faulty; and an information prompting mode is sound or LED (Light Emitting Diode) light display. According to the water circulating system for wall-hung plant cultivation, automatic-cycle watering and fertilizing can be carried out by using the water circulating system, water replenishing operation can be carried out in a timed manner so as to replace manual operation and simplify tedious procedures, and thus convenience is provided for users.

The sliding door and window with the channel dust cleaning structure comprises a door and window frame and a dust collecting box, sliding channels are formed in the top wall and the bottom wall of the door and window frame, an edge covering frame is installed in each set of sliding channels in an embedded mode, and the dust collecting box is installed on the surface of a supporting rod; a shovel plate and a feeding groove are installed on the surface of one side of the dust collecting box, a suction hose is connected to the top of the feeding groove in a penetrating mode, a micro telescopic rod is installed on the bottom wall of the dust collecting box, and a partition plate is installed on the top of the micro telescopic rod; a square box is slidably connected into the sliding groove channel. Through the arrangement of the dust collecting box, the shovel plate, the feeding groove, the partition plate and the micro telescopic rod, dust accumulated in the sliding channel is shoveled away through the shovel plate in the moving process, cleaning of the interior of the sliding channel is achieved, and after moving cleaning is finished, the micro telescopic rod and the partition plate are matched with each other, so that the dust collecting effect is improved. In this way, the possibility that dust in the dust collecting box is scattered into the sliding groove channel through the feeding groove is reduced.