72results about How to "Randomness" patented technology

The present invention relates to a flexible reconfigurable automobile welding clamp comprising a base desk, a clamping mechanism and an independent main positioning mechanism. The present invention is characterized in that the clamping mechanism comprises an upright post, an inner sleeve, an outer sleeve, a L-shaped upright post, a flat plate connecting piece, a compacting block and a compacting connecting bar; the inner sleeve is fixed on the upright post; the outer sleeve is sheathed outside of the inner sleeve and the inner sleeve and the outer sleeve is adjustably connected with each other; the L-shaped upright post is fixed on the outer sleeve and is fixedly connected with the flat plate connecting piece on the side surface; the front end of the flat plate connecting piece is fixedly connected with the compacting block by the compacting connecting bar; the independent main positioning mechanism comprises a positioning piece, a middle transition piece, a L-shaped block, a flat plate provided with holes, a L-shaped connecting block and a flat plate; the flat plate provided with holes is fixedly connected on the flat plate by the L-shaped connecting block; the L-shaped block is connected with the flat plate provided with holes and is connected with the middle transition piece. The clamp of the present invention has a high flexibility, is adapted to a plurality of different workpieces, can be reconfigured rapidly, thereby the cost is reduced and the production efficiency is improved.

The invention relates to the field of sports equipment, and discloses an auxiliary device for training shuttlecock pace. The auxiliary device comprises a laser projector, a main controller and a plurality of position sensors, wherein the laser projector is controlled by the main controller; the main controller transmits data to the position sensors through a wireless communication mode; the position sensor comprises a base, an elastic rod, a single chip circuit and an infrared reflected sensor which is connected with the single chip circuit; the elastic rod is fixed on the base and arranged above the base; and infrared light emitted by the infrared reflected sensor is upwards emergent. By using laser projection to guide the running position of athletes, not only a training proposal can be programmed by a coach in advance according to the features of the athletes, but also the reaction time of the athletes at each position during training can be recorded and counted to evaluate a training result; thereby providing scientific basis for programming a next training proposal.

The invention discloses a back-contact solar battery. The back-contact solar battery comprises a silicon substrate, wherein p+ doping areas and n+ doping areas are mutually alternately distributed on the back surface of the silicon substrate, each p+ doping area is provided with a positive-electrode contact fine grid, each n+ doping area is provided with a negative-electrode contact fine grid, the back surface of the silicon substrate is further provided with a positive-electrode main grid and a negative-electrode main grid, the positions, making contact with the negative-electrode contact fine grids, of the positive-electrode main grid are provided with insulation blocking layers, and the positive-electrode main grid is located on the insulation blocking layers and connected with the positive-electrode contact fine grids. The positions, making contact with the positive-electrode contact fine grids, of the negative-electrode main grid are provided with insulation blocking layers, and the negative-electrode main grid is located on the insulation blocking layers and connected with the negative-electrode contact fine grids. The invention further discloses a manufacturing method of the back-contact solar battery. The back-contact solar battery can eliminate carrier transverse transmission loss caused by a common main grid of a back-contact solar battery in the prior art and the electrode shadowing effect of the common main grid, and the number of fill factors and the number of short-circuit currents of the back-contact solar battery are increased.

The invention relates to the technical field of plant cultivation, in particular to the sustainable water and fertilizer conservation production technique for banana cultivation. The sustainable water and fertilizer conservation production technique comprises the specific steps of using the function that water retaining agents can absorb hundreds of times of water repeatedly to dilute fertilizers into liquid nutrient solution which is absorbed by the water retaining agents into solid nutrient solution; and punching four water and nutrient storage holes (pits) around a banana stock plant, filling up the storage holes (pits) with the solid nutrient solution, repeatedly absorbing and storing fertilizers and water through the water retaining agents in the storage holes (pits), and slowly releasing the fertilizers and water to be absorbed by the banana stock plant. The sustainable water and fertilizer conservation production technique solves the problem that banana root is prone to rot when a lot of water is irrigated, fixes water and fertilizers to be slowly released, enables the banana stock plant to absorb for a long time in a balance and complete mode and prevents fertilizers and water from flowing and wasting. The sustainable water and fertilizer conservation production technique removes foundation facilities and is small in invest, simple in process, easy to operate, obvious in effect and capable of being widely applied to and popularized in banana farmers.

The invention discloses a method for modeling a background based on a camera response function in an automatic gain scene, which comprises the following steps of: performing automatic gain progressiveness-based analysis to obtain a roughly divided background area, obtaining low-noise training data by using a joint histogram method, and performing recovery once to obtain a globally optimal camera response function by the method based on maximum likelihood estimation and parameter constraints; online calculating a gain ratio frame by frame by utilizing correlation between a foreground and background difference and the gain ratio and the homography of a grayscale difference function relative to the gain ratio; and if the gain ratio is not 1, performing updating to obtain a background reference frame the same as a current reference frame by using the camera response function and the gain ratio, otherwise determining the background reference frame is unchanged, and obtaining the background reference frame with a gain coefficient the same as that of the current frame along with the change of the gain coefficient of a camera. By the method, the shortcomings of high background change speed, caused by difficulties in realizing automatic gain along with the camera, of the conventional methods are overcome, thereby ensuring high-efficiency motion detection.

The invention relates to an efficient culture method of dragon fruits, which comprises the concrete steps of punching several moisture and nutrition storage holes around a dragon fruit plant; diluting fertilizer into a liquid-form nutrition solution; absorbing the nutrition solution by a water-retaining agent to enable the nutrition solution to be formed into solid nutrition solution fertilizer; filling the solid nutrition solution fertilizer into the storage holes; slowly releasing water and fertilizer in the solid nutrition solution fertilizer in the storage holes for being absorbed by a grape plant. After the solid nutrition solution fertilizer in the storage holes is completely released, the water-retaining agent has a function of repeatedly absorbing multiple times of water, then water and fertilizer are filled into the storage holes, the water-retaining agent in the storage holes is used for absorbing and curing water and fertilizer nutrition again, and releasing the water and fertilizer nutrition when the plant is dry for being absorbed by the grape plant. The problem that root rotting of the dragon fruits due to heavily watering is solved; water and fertilizer are fixed and then slowly released, so that the dragon fruits can be completely and uniformly absorbed for a long time, and water and fertilizer are prevented from running off and being wasted. The efficient culture method has the characteristics that the investment is little, the process is simple, the operation is easy, the effect is obvious, and the like.

The invention discloses a transformer partial discharge ultrahigh frequency detection Hilbert fractal antenna optimization method. The method includes the following steps: S1, determining a fitness function of a genetic algorithm according to a design object of an ultrahigh frequency antenna, and controlling the search direction of the algorithm; S2, determining structural parameters a, b, and c, of the antenna and an encoding and decoding scheme of (x, y); S3, using each group of structural parameters of the ultrahigh frequency antenna as an individual, and determining a certain number of individuals as an initial population of the genetic algorithm; S4, decoding a binary code of each individual into a structural parameter of the ultrahigh frequency antenna, invoking Ansoft Designer software to perform simulation so as to acquire an electrical characteristic parameter of the antenna, and substituting the calculated standing-wave ratio into the fitness function to calculate the fitness value of the individual; and S5, determining if a design demand of the antenna is met or not according to the returned fitness value of the individual. The invention provides an analysis antenna automatic optimization algorithm which can improve the design ability and efficiency of the antenna, and can acquire a partial discharge ultrahigh frequency detection Hilbert fractal antenna having excellent performance.

The invention belongs to the plant cultivation technical field, and specifically relates to a Nymphaea 'Rose Arey' cultivation method comprising the following steps: seed source selection; culture pot preparation; planting; water level control; fertilization management and insect disease control; the method reasonably applies fertilizers in the Nymphaea 'Rose Arey' cultivation period, controls water level according to Nymphaea growth conditions, and uses a plant source pesticides to control aphids and Nymphaea water pyralids harming the Nymphaea, thus realizing standard management of the Nymphaea; the method can culture Nymphaea 'Rose Arey', the culture place is random, and large area cultivation can be realized; the Nymphaea 'Rose Arey' cultivation method is high in survival rate, prosperous in plants, good in vigor, less in insects, thus obtaining excellent Nymphaea 'Rose Arey' miniascape or flowers, and satisfying market demands.

The invention relates to a method for manufacturing a pressure vessel by utilization of metal nickel electrotyping, comprising preparation of a mandrel, manufacturing and copying, and demoulding, wherein, the compositions of an electrodeposition cell solution used in the step of manufacturing and copying are 60 to 120 weight portions of nickel sulfamic acid, 10 to 40 weight portions of boric acid, 2 to 6 weight portions of sulfamic acid, 2 to 6 weight portions of nickel carbonate, 2 to 6 weight portions of nickel chlorite and 1,000 weight portions of water; and the operating conditions of the electrodeposition cell solution are as follows: the pH value is between 3.50 and 4.80; the operating temperature is between 45 and 70 DEG C; the operating voltage is between 12 and 15 volts direct current; and the current density is between 0.5 and 6.0 amperes per square decimeter. The method is simple and convenient in manufacturing, does not require a plurality of devices, saves the manufacturing cost, and then is more suitable for practical use.

The invention discloses an STL file format based main progressive forming direction determination method. By using a triangular patch outer-normal vector in an STL file format, a basis is provided for selecting a reasonable forming position for a progressive forming part. The method has the beneficial effects that 1) traditional main progressive forming direction selection has great randomness and cannot ensure smooth progressive forming of the part; the method can effectively control each position forming corner of the part to be within the range of a forming limit angle, thereby ensuring smooth forming of the part; 2) thickness uniformity of different positions of the part can be effectively controlled and realized, and the strength, stiffness and subsequent assembly condition of the part can be improved; 3) for a special thickness requirement of a special position of the part, control can be performed in advance to select a reasonable main forming direction; and 4) improvement of material thickness distribution can improve the adaptability of a progressive forming process and facilitate popularization and use of the progressive forming technique in actual production.

The invention discloses a touch blackboard capable of being used for writing. The touch blackboard mainly comprises a piece of blackboard glass and intelligent touch equipment, wherein the blackboard glass is used for writing and has good light transmission. The intelligent touch equipment comprises a touch display, a mainboard module, a power module and a calculation display unit and a supporting shell of another module. The intelligent interactive blackboard integrates the advantage of an ordinary blackboard that writing is convenient and the advantages of an intelligent interactive all-in-one machine, so that writing and annotating are more convenient, faster and more freely for children and various exchange activities in work, writing with chalk can be achieved, and multimedia presentation can also be conducted; and the touch blackboard is easy to move, and the randomness of application scenes is improved.

The invention discloses a directional sports wist, comprising a mobile client and a remote control terminal, wherein the mobile client comprises a microprocessor, the input end of the microprocessor is electrically connected with user's log-in confirmation module and input panel module's output end, the microprocessor's output is electrically connected with input end of timer, AR imaging module and GIS system module, the AR imaging module's output end is electrically connected with the display panel's input end, and the GIS system's output end is electrically connected with the sports scene selection module's input end. Through microprocessor, GIS system, electronic compass, central processing unit and data computation processing module set in the invention, game setter can draw live map in certain proportion through GIS system on wist, which avoids manual drawing of map and consumption of financial resources, and saves cost. The sticking point and difficulty in passing level make directional sports more interesting, to reduce cost of direction sports and improve enjoyment of directional sports.

An oil containment boom capable of being laid rapidly comprises a strip-shaped oil containment boom body, wherein a plurality of floaters are installed on the oil containment boom body at intervals; each floater comprises a plate-shaped floater framework; the two sides of each floater framework are symmetrically provided with rotatable floating plates; every two floating plates can be flush with the corresponding floater framework so that all the floaters can be stacked together. The oil containment boom capable of being laid rapidly is simple in structure, and the floating plates providing buoyancy for the floaters can rotate to the position flush with the floater frameworks. When the oil containment boom is stored, the floaters can be stacked layer by layer like plates, the positions, among the floaters, of the oil containment boom body are folded and arranged in an S mode, and the oil containment boom in the stored state occupies a small space. When the oil containment boom needs to be laid, a user only needs to drag and unfold the oil containment boom body, then the floating plates rotate to the operation position freely, the oil containment boom is laid, operation is easy, and the laying speed is high. The floating plates and the floater frameworks are of a symmetrical structure respectively, great randomness is achieved when the oil containment boom is laid, the requirement for operation personnel is not high, and the laying speed is further increased.

The invention discloses a double closed loop speed control captive trajectory simulation (CTS)CTS test method based on time and space transformation. On the one hand, an error model of CTS speed control is established by a load discreet value calculation method based on speed second order interpolation polynomials, the self adaption of time step length of the movement of external models is realized, and the optimal time and space transformation scale is dynamically produced by combining dynamic response parameters of CTS hardware and errors of trajectory control; and on the other hand, the movement speed of a support mechanism for a six-freedom degree model is precisely controlled in a conventional speed closed loop control mode formed by a lower computer and a speed sensor, signal measurement and data calculation can be performed without suspension, the center of gravity of the model is ensured to be continuously kept on a real movement track, false collision of the external models and a master is avoided, and the CTS time is shorten and the test cost is reduced possibly under the condition of ensuring test precision.

The invention discloses a method for preparing solid drought-resistant water-retaining nutrient solution. The solid drought-resistant water-preserving nutrient solution is prepared by absorbing prepared nutrient solution through gel and dry-powder water-retaining agent produced by Plant Drought-resistant Water-retaining Agent Factory in Fusui County of Guangxi Province. The solid drought-resistant water-retaining nutrient solution is applied to the peripheries of roots of plants, and releases water for the plants and nutrient solution required by the growth of the plants during drought. After artificial irrigation or rainwater, the solid drought-resistant water-retaining nutrient solution can absorb and store excessive water, and releases water for the plants during drought, so that steady high yield of the plants can be achieved in the environment.

The invention belongs to the field of a tool for power transmission lines and specifically relates to a U-shaped screw rod insulation installer, which is an insulation tool for live-line installation and disassembly of a straight line holder for a 66 KV power transmission line. The installer comprises a main body and a locking structure. The main body has two parallel side bodies having a certain thickness; the bottom portions of the two side bodies are connected, and a strip-hole channel is formed in the middle; the inner side surface of at least one side body is provided with a U-shaped clamp groove for placing a U-shaped screw rod; and the locking structure comprises a telescoping ejector rod bolt arranged in the strip-hole channel, and a screw rod passing through the bottom portion of the side bodies and connected with the ejector rod bolt, wherein the other end of the screw rod is connected with an insulation rod. According to the insulation installer, the straight line holder can be installed, disassembled and replaced without cutting off the power, thereby improving operability range, increasing live-line work items and effectively improving work efficiency.

The invention relates to the field of mulberry planting, and in particular relates to a high-yield pruning method for mulberries in the north of China. The method aims to solve the problems such as anirregular tree shape, random spring pruning of branches and insufficient number of branches exist in a current pruning method for the mulberries in the north of China; and the method includes the following steps: 1) training a tree shape, planting the mulberries in late autumn and early winter, and performing cultivation to obtain a strong branch in a first year; performing cultivation to obtainthree strong branches in a second year; performing cultivation to obtain six strong branches in a third year; and performing cultivation to obtain twelve strong branches in a fourth year; 2) performing spring pruning: performing spring pruning on branches of one same mulberry by taking a main trunk as a center, determining the number of branches for spring pruning, determining the number of buds to be retained, and shortening the pruned branch distance; and 3) in the growth process after the tree shape is trained, performing one-branch-twice-cutting in spring and one-branch-twice-cutting in autumn. The method provided by the invention standardizes the reasonable number range of branches per mu of a mulberry field, innovates the high-yield structure of the mulberry field, improves the yieldof mulberry leaves to a maximum extent, reduces the costs of silkworm breeding, creates a high yield of the mulberry field and a new achievement of autumn mulberry shoot labor-saving breeding of silkworms, and fills the gap of the autumn mulberry shoot labor-saving breeding of silkworms in China.

The invention discloses a hierarchy-based gray estimation method for a satellite communication resource utilization rate. According to the method, the problems of multi-dimensional, hierarchical and inconsistent contribution of evaluation indexes involved in multi-system satellite communication resource utilization rate estimation can be solved; firstly, a hierarchical index system is constructedby using an analytic hierarchy process, then clustering index samples are classified and whitened by using a whitening weight function and an initial value operator, then a fixed-weight clustering coefficient of each clustering index relative to each grey class is calculated, the comprehensive weight of each clustering index is calculated by using the analytic hierarchy process, and finally, estimation of multiple systems is performed. According to the method, the subjectivity of a traditional analytic hierarchy process and the weight randomness of a grey clustering analysis method are overcome, and the rationality and the true effectiveness of evaluation are effectively improved.

The invention discloses a hanging construction method of a wall decorative plate, which solves the problem that the existing wall plate is inconvenient in construction and high in price. According to a technical scheme, the method comprises the following steps: selecting a plate with a groove in a side surface, gradually laying the plates vertically on a wall layer by layer by virtue of hooks with various structural forms, hanging the plates onto the wall, directly fixing the hooks onto the wall by virtue of an anchoring part, wherein the side edges of two adjacent plates are connected together by virtue of the hooks, and an entire external decorative layer is connected into a whole.

The invention provides a post-cast strip plugging structure and a construction method thereof. The post-cast strip plugging structure comprises longitudinal steel bars, fixing steel bars, supporting steel bars, a plugging net, water-stopping steel plates and transverse steel bars; the plugging net is vertically arranged at the interface between the post-cast strip side and the plate side; the water-stopping steel plates are horizontally arranged in the middle of the plugging net and penetrate into a post-cast strip from the interior of the plate side; spaced fixing steel bars are connected tothe water-stopping steel plates perpendicular to the plate surfaces of the water-stopping steel plates; the horizontal longitudinal steel bars and the transverse steel bars are arranged at the upper ends and the lower ends of the fixing steel bars; the longitudinal steel bars and the transverse steel bars are perpendicular to each other; and the fixing steel bars, the plugging net and the water-stopping steel plates form a grid structure on the vertical surface, and one supporting steel bar is arranged between every two opposite fixing steel bars. The construction method is scientific and easyto operate, the overall combination of post-cast strip concrete is effectively improved, the occurrence of obvious cracks is avoided, and the good construction quality can be ensured.

The invention provides visual grabbing testing device and system. The device comprises a feeding mechanism, a material conveying mechanism and a temporary storage bin, the feeding mechanism is used for containing materials, so that a visual grabbing device can position and grab materials; the material conveying mechanism is used for receiving the materials grabbed by the visual grabbing device and conveying the materials to the temporary storage bin; and the temporary storage bin is used for temporarily storing the materials conveyed by the material conveying mechanism and returning the materials to the feeding mechanism in a staged mode. According to the visual grabbing testing device, the materials can be continuously and circularly grabbed without human intervention, the position and posture of the materials in the feeding mechanism are not limited, the randomness is large, the real working condition can be truly simulated, the visual grabbing device is rapidly tested, and therefore, stability and reliability of the visual grabbing device are effectively improved.