183results about How to "Achieve simplification" patented technology

The invention discloses a resistance choke type tiny particle and cell detection micro-fluidic chip and a preparation method. A PDMS (polydimethylsiloxane) cover plate (1) and a substrate (2) are bonded to form the resistance choke type tiny particle and cell detection micro-fluidic chip, the shape and the size of the substrate (2) adapt to those of the cover plate, at least one pair of tiny electrodes (8) are arranged on the substrate (2), a micro-fluidic pipeline is arranged on the cover plate, one surface of the substrate (2) with the tiny electrodes and a contact surface of the micro-fluidic pipeline contacting with the substrate are bonded in an aligned manner, the micro-fluidic pipeline is closed and comprises a sample inlet (4), a main pipeline (7) and a sample outlet (3), and the main pipeline (7) is provided with a sample inlet pipeline (10), a shrinkage detection pipeline (11) and the narrowest portion (5). A complex pipeline and fluid control system needed by sheath fluid focusing technology is avoided, flow resistance increase effect caused by pipeline size reduction is avoided by optimized structural size parameters, and detection throughput and sensitivity are improved.

The invention discloses a high-power braking energy consumption device and a control method thereof. The device comprises an isolating switch module, a chopper module, a reactor module and a braking resistance module, wherein the isolating switch module is connected with the reactor module, the chopper module is connected with the reactor module, the braking resistance module is connected with the chopper module, the isolating switch module detects the voltage of a direct-current bus, the braking resistance module comprises a bipolar linkage blade switch and an absorbing resistor, the double-system conversion of the high-power braking energy consumption device is realized through the bipolar linkage blade switch according to the voltage of the direct-current bus, and the braking resistance module implements the absorption and discharge of braking energy. The reactor module comprises a filter reactor which is used for carrying out filtering on the voltage of a power grid. The chopper module is used for carrying out chopping control on the braking energy. According to the invention, the double-system conversion of the high-power braking energy consumption device is realized, and in the double-system, the device can absorb higher power fed back by currently involved domestic railway vehicles, thereby ensuring the reliable operation of power grids and vehicles.

The invention discloses a dynamic phasor modeling method for a current converter of a high-voltage direct-current transmission system, which is applicable to various operating conditions and fault conditions. The method comprises: calculating the actual trigger angle, the actual phase conversion angle and the actual delay flow angle of various converter valves in the current converter according to first dynamic phasor and direct-current zero-order dynamic phasor of the voltage between phases of a converter bus; calculating the three-phase voltage switch function and the three-phase current switch function according to the actual trigger angle, the actual phase conversion angle and the actual delay flow angle of the various converter valves; and establishing a dynamic phasor model according to the three-phase voltage switch function and the three-phase current switch function. The method can realize the establishment of the dynamic phasor model of the current converter under various operating conditions and fault conditions of AC, reduces the calculation amount, has the precision capable of meeting the requirement of engineering application, and can be applied to simulation analysis of dynamic characteristics of an AC system in an AC and DC compound system under various normal operating conditions and fault conditions.

The invention provides an LOD model generation method based on a linear quadtree. The method comprises the following steps: performing linear quadtree segmentation on to-be-drawn terrain, storing data of the to-be-drawn terrain in a two-dimensional array, reading information of each node in the linear quadtree from the two-dimensional array through an index, storing leaf node information of the linear quadtree, organizing terrain nodes, enabling the terrain nodes in the linear quadtree to be stored in a one-dimensional array, establishing a terrain node evaluation mechanism on the basis that a static error and a dynamic error are considered, performing crack elimination on different segmentation levels of the adjacent terrain nodes, and obtaining an LOD model based on the linear quadtree. The method is applied to a terrain simplification aspect in a computer graphics and image field, and the terrain nodes are organized by utilizing a linear quadtree storage model and through combination use of a two-dimensional filling curve; on the basis that error factors are fully considered, the node evaluation mechanism is established, and a terrain crack problem is eliminated; and terrain drawing efficiency can be obviously improved.

The object stage device (4) includes: a support part (8), which is vibrateably and independently arranged relative to the fixed plate (3); and a reaction force stage (17), which is The resulting reaction force is free to move on the support (8) in said one direction. Thereby, since problems such as shaking due to the reaction force can be avoided, the adjustment time can be shortened, productivity can be improved, and transmission of residual vibration of the support portion to the fixed plate can be suppressed.

The present invention relates to a method, a device and a system that can realize the access authentication. A network node initiates an access authentication operation with an authentication server, which performs an authentication processing on the access authentication operation initiated by the network node; after the network passes the authentication and is authorized as a trusted node, a user connected to the trusted node initiates an access authentication operation via the trusted node, and the authentication server performs an authentication processing on the access authentication operation initiated by the user. Meanwhile, the trusted node utilizes the received control information released by a policy server to perform various control operations on the user. The present invention enables service providers to pointedly carry out accounting and charging on different users under a network node according to different service circumstances and prevents sham users; and the network node can perform the corresponding management operations on the policy information and an admission control list and can locally monitor the service level agreement nearby.

There is provided an inductively coupled plasma processing apparatus capable of reducing a RF power loss within a high frequency power supply unit (particularly, a matching unit) and capable of enhancing a plasma generation efficiency. In this inductively coupled plasma processing apparatus, a multiple number of closed-loop secondary circuits 96, 98 independent from each other are formed between a coaxial antenna group 54 and a transformer 68. Further, by varying electrostatic capacitances of variable capacitors 64 and 66, secondary currents I2A and I2B flowing through an inner antenna 58 and an outer antenna 60, respectively, of the coaxial antenna group 54 are independently controlled. Accordingly, it is possible to readily control a plasma density distribution on a semiconductor wafer W in a diametrical direction.

The invention discloses a preparation method of a carbon nanotube reinforced aluminum base composite material. The preparation method comprises the following steps: a carbon nanotube, aluminum powder or aluminum ally powder and a process control agent are prepared to composite powder by ball milling; the composite powder is packed in a cover material, is heated to an appointed temperature for sintering, and is hotly extruded to prepare a composite material blank; and the cover material is stripped to obtain a target product. The preparation method adopts a thermal extrusion powder forming process, simplifies the technological flows of blank pressing, sintering and thermal extrusion molding in a traditional powder metallurgy process, realizes one-step molding, greatly improves the production efficiency, prevents the insulation time of a carbon nanotube and an aluminum matrix in a high-temperature area in a similar multi-step powder metallurgy process, prevents quick interface reaction of the carbon nanotube and the aluminum matrix, effectively controls effective interface bonding between the aluminum matrix and the carbon nanotube, is simple in preparation process, and broad in industrial application prospect, and effectively reduces the cost.

The invention provides a heat supply network equivalent modeling method. The method comprises the steps of building a centralized heat supply primary pipe network system mathematical model according to a fluid network modeling technology; performing equivalent aggregation on the built mathematical model so as to acquire a model parameter; and checking whether deviation exists or not between the model parameter and measured data. The modeling method provided by the invention is based on heat transfer and fluid mechanics principles and a power system, and the mathematical model built based on the fluid network modeling technology conforms to physical characteristics of an actual heat supply network; simplification and checking for a large complex heat supply system model are realized through topological structure simplification, key parameter identification and field measured data, and the calculation speed and the accuracy of a heat-power joint optimization model are improved.

The application discloses an integrator, an LED current ripple elimination circuit and method, a LED driver and LED equipment; the integrator comprises the following units: a voltage comparison module used for receiving an input voltage and a reference voltage, comparing the two voltages, and outputting a corresponding logic signal according to the comparison result of the two; a counting module used for counting the logic signals outputted by the voltage comparison module so as to form a digit control signal; a digital analog conversion module used for carrying out digital analog conversion for the digit control signal outputted by the counting module, thus forming an analog control signal. Compared with the prior art using a difference amplifier and a filtering capacitor, the integrator is simple in circuit structure, higher in integrated level, and can especially omit the large filtering capacitor, thus simplifying the peripheral circuit, reducing the system cost, and thoroughly eliminating the failure problems caused by the peripheral filtering capacitor.

A secondary battery is protected from being overcharged and excess discharge current by a simple circuit. A comparator (CMP1) compares a charging voltage (Vc) of the secondary battery (6) with a reference voltage (Vref1) and detects overcharge. A transistor (Q1) turns on and turns on a heater (R2) when overcharge is detected by the comparator (CMP1). A PTC element (SW1) turns off when it is heated by the heater and reaches a prescribed operation temperature (Tsw1), and interrupts a charging current. When the discharge current from the secondary battery (6) is excessive, the PTC element (SW1) self-heats by the discharge current and turns off when it reaches the operation temperature (Tsw1) and interrupts the discharge current.

The invention relates to the technical field of big data, and provides a user portrait generation method and device, computer equipment and a storage medium. The user portrait generation method comprises the following steps: obtaining an APP data list of a target user, generating a feature vector matrix taking the feature parameters as vector factors according to the characteristic parameters of each APP in the APP data list, obtaining a central vector matrix of each preset APP vector matrix set, determining a relationship parameter between the feature vector matrix and each center vector matrix, according to respective relationship parameters, determining a target vector matrix from each central vector matrix, taking an APP vector matrix set where the target vector matrix is located as atarget set, obtaining label information corresponding to the target set, and according to the label information, generating a user portrait of the target user, thereby determining a corresponding APPvector matrix set for a large amount of APP data of the target user through clustering simplification, obtaining simplified label information, more accurately describing features of the target user, and improving the analysis efficiency of the user portrait.

The invention relates to a binding agent, a preparation method and a grinding wheel, and belongs to the technical field of abrasives and grinding tools. The binding agent is mainly prepared from the following raw materials by mass percent: 70% to 85% of gypsum, 1% to 12% of glass fiber powder and 8% to 18% of clay. According to the binding agent, the raw materials coact with each other in a limited dosage proportion range, so that a compound high-temperature sintered product has relatively high strength, proper hardness and good plasticity; during preparation of the grinding wheel, the binding agent is mixed with water according to a suitable proportion, the forming speed is high, sintering is not carried out in the follow-up steps, and only natural drying or accelerated drying is required; sintering is not required, and the hardening speed is high, so that various problems like cracking and foaming occurring in traditional ceramic bond sintering are avoided; the binding agent is applicable to grinding wheels for low-speed and high-precision grinding, and the prepared grinding wheel is sharp and is high in grinding efficiency; the binding agent is applicable to various abrasives, the holding force for the abrasives is good, and the binding agent has universality; and the raw materials of the binding agent are easy to obtain, the cost is low, and the binding agent is applicable to large-scale industrial production.

The invention discloses a feature extraction method for digital modulation signal identification. The method comprises the following steps: S1, reading a signal sampling sequence of a to-be-processedsignal; S2, performing Hilbert transform to obtain a final analytic signal sequence; S3, performing statistical magnitude feature extraction to obtain a feature parameter A; S4, performing instantaneous statistical feature extraction to obtain a feature parameter B-H; S5, performing feature optimal effect combination on the feature parameters A-H to obtain a feature vector group; S6, the feature vector group is transmitted to multiple classifiers, and recognition of the digital modulation signals is completed. According to the method, multiple statistical parameters are obtained from instantaneous information of signals, existing parameters are simplified and optimized, new characteristic parameters are added, an optimal effect characteristic extraction model capable of processing different digital signal combinations is formed, and then the optimal effect characteristic extraction model is transmitted to multiple classifiers, so that common identification of multiple digital signals can be realized.

The invention relates to a permanent magnet synchronous motor, in particular to a control method of a PMSM servo system current loop. The existing servo system control parameter setting method or theidentification of motor electrical parameters has errors or large amount of calculation and cannot ensure rapid convergence to stable values in the optimization process of control parameters. The invention provides the control method of the PMSM servo system current loop. The current loop comprises a power supply, a current controller, an inverter, a PMSM and a current detection unit. The input current of the power supply passes through the inverter and the PMSM in turn to output current. The current detection unit samples the output current and feeds it back to the power supply. The method controls the current according to the actual open-loop transfer function and the actual closed-loop function through the current controller. The control method combines the advantages of the two technologies in the prior art and reduces the error and the calculation amount of the electrical parameters.

The invention provides a high-voltage circuit breaker adopting a built-in type operating mechanism, wherein the high-voltage circuit breaker comprises an A phase ceramic sleeve, a B phase ceramic sleeve, a C phase ceramic sleeve, a built-in type operating mechanism and a transmission mechanism; each of the A phase ceramic sleeve, the B phase ceramic sleeve and the C phase ceramic sleeve comprises an upper ceramic sleeve, a lower ceramic sleeve and a wiring board, the upper ceramic sleeve and the lower ceramic sleeve are connected through the wiring board, an arc extinguish chamber is arranged in the upper ceramic sleeve, a insulated pull rod is arranged in the lower ceramic sleeve, one end of the insulated pull rod is connected with the arc extinguish chamber, and the other end and the built-in type operating mechanism are connected with the transmission mechanism separately. According to the invention, a driving motor is arranged on the middle part of the high-voltage circuit breaker to realize the balance and transmission of the actuating force; a permanent magnet synchronous motor adopted by the circuit breaker replaces a spring operating mechanism, so that the mechanism and components are simplified, can be change conveniently and control flexibly; the structure of the circuit breaker has small rotational inertia and light weight, and is simple, reliable and easy to realize.

The invention provides a pulse generating circuit, a device using the same and an information transmitting method. The pulse generating circuit can easily generates a high frequency band pulse with a low energy consumption by using a simple circuit without using a high-cost semiconductor process. The pulse generating circuit is composed of: inverter circuits (101-109) which are connected in series according to a predetermined amount of stage; a plurality of NAAD circuits (110-113) which are connected with the input / output side of one of the inverter circuits (101-109) every other one stage, generating a pulse with a width which is equal to a delay of each stage of the connected inverter circuits (102, 104, 106, 108); and a NOR circuit (114) which obtains an 'or' of the output of the NAND circuits (100-113).

The invention discloses a high-resolution remote sensing image scene multi-label classification method based on multi-packet fusion. The method comprises the following steps: firstly, extracting multiple heterogeneous features on a high-resolution remote sensing image according to grid division and performing encoding; secondly, dividing sub-regions through a layering method and a segmentation method to pool the coded features, and obtaining a layering example package and a segmentation example package; using Mahalanobis distance to cluster the packets by a K-Medoids method, solving distancesfrom the packets to all clustering centers, and forming vectors by all distance values, so as to convert a multi-instance packet into a single instance; carrying out series fusion on the obtained single examples; and finally, designing a plurality of binary classifiers through a pair of other methods to solve the multi-label problem. According to the multi-packet fusion-based high-resolution remote sensing image scene multi-label classification method provided by the invention, the classification performance is improved, and a more excellent classification result is obtained compared with an existing classification method.

An EGR control device for an internal combustion engine has an EGR control means (44) that, when a large amount of EGR is required, continuously controls the opening of an EGR valve (26) in a fully open direction and continuously controls the opening of a suction throttle valve (12) in a fully closed direction. In an insensible region in which variation in the amount of EGR is small relative to the opening of the suction throttle valve, the control means applies limitation to feedback control of the amount of EGR carried out by the suction throttle valve and performs, on the other hand, feedback control of an EGR amount carried out by the EGR valve to supplement the limited feedback control by the suction throttle valve.

The invention provides an image retrieval and filter apparatus based on wavelet feature and a method thereof, relating to an image retrieval and filter method, in particular to a fast image retrieval and filter apparatus which is based on wavelet feature and has stronger invariability on operations such as rotating, noise increasing, filtering and scaling changing and the method thereof. The apparatus comprises a feature extracting unit and a match marking unit, wherein the feature extracting unit is used for carrying out tree-type structure scanning on the wavelet transformation coefficient after thresholding to effectively extracting the feature of the image, and the match marking unit is used for evaluating the matching degree of the image feature to be retrieved and the image feature in the store and outputting the marking of the matching degree. The invention realizes the aim of fastness, simplicity and unchanged rotation.

A parking brake device arranged so that a parking brake state is obtained by the operation of forwarding a parking piston (33) in response to the action of a parking control liquid pressure, while the forwarding state of the parking piston (33) is mechanically locked by a lock mechanism (43). Furthermore, the input member (23) of a brake mechanism (11) and the parking piston (33) are connected by a connecting means (35). A piston (44) possessed by the lock mechanism (43) is actuated in one axial direction at the time of the operation of forwarding the parking piston (33), so that a lock section (46) provided at one end of the lock piston (44) engages an engaging section (45) from behind while standing astride the intermediate section of the connecting means (35), which engaging section (45) is disposed in the intermediate section of the connecting means (35). This makes it possible to obtain an automatic parking brake state by a simple construction not involving electric power consumption.

The invention relates to an ankle joint rehabilitation robot structure and a using method thereof. The ankle joint rehabilitation robot structure comprises a supporting base, wherein supporting rods are respectively arranged on two sides of the supporting base; two ends of a horizontally arranged inverted-n-shaped connecting piece are respectively rotatably connected with the upper ends of the supporting rods; a vertical rod of which the upper end is rotatably connected with the inverted-n-shaped connecting piece is arranged in the middle of the inverted-n-shaped connecting piece, and the inverted-n-shaped connecting piece is provided with a first encoder; the lower end of the vertical rod is fixedly connected with the rear end of a movable platform; two sides of the front part of the movable platform are respectively provided with a driving piece for driving the movable platform to swing; and a second encoder is arranged at the end, which is rotatably connected with the supporting rods, of the inverted-n-shaped connecting piece. According to the ankle joint rehabilitation robot, under the condition that the ankle joint rehabilitation effect is met, simplification on a mechanism isrealized, and a complex parallel mechanism is simplified into a motion space which can be realized by two rods.

Disclosed is a vehicle body panel joining structure which is provided with: a structural frame (30b) having a ridge line in the lengthwise direction, which has one section joined to a first vehicle body panel (44) and another section joined to a second vehicle body panel (43); an overlap part (61) which overlaps the first and second vehicle body panels and is disposed in such a way that the structural frame straddles the overlap part; a depressed part (64) which is provided at a position avoiding the ridge line on the structural frame and is abutted by the overlap part; and a spot-welded part (65) which is joined to the depressed part, the first vehicle body panel and the second vehicle body panel at the overlap part by means of spot welding.

The invention discloses an automatic stamper machine. The automatic stamper machine comprises a stamper machine body and a stamper module arranged on the stamper machine body, wherein the stamper machine body comprises a stamping platform, a supporting frame and a detecting mechanism; the stamping platform is used for placing an object to be stamped; the supporting frame extends upwards along the plane of one side of the stamping platform vertical to the stamping platform; the detecting mechanism extends along the direction parallel to the stamping platform at the top part of the supporting frame; the stamper machine body also comprises a mechanical arm which is movably arranged on the detecting mechanism; the supporting frame is internally provided with a hollow cavity for containing the mechanical arm; a stamping pad is fixedly arranged at the bottom part of the hollow cavity; when the machine is in use, the stamper module is arranged into an executing mechanism from the outer part, and locking is finished. The automatic stamper machine disclosed by the invention has the advantages that since a stamper is placed in the stamper module for protection, even though in the use process, the stamper module can be given out for stamping after the permission is validated, so that the safety of the stamper in the use process is ensured.

The invention discloses a water chilling unit load prediction control method and system based on a side cloud collaborative framework, and belongs to the field of optimal control. The invention provides layered optimization control of a water chilling unit by utilizing edge computing and cloud computing fusion. Load real-time prediction and division and data preprocessing are performed at an edge end; a parameter matrix is controlled under different load rates; a load prediction model and an energy consumption fitting model are trained and updated at a cloud end; optimization is performed on control parameters of the water chilling unit; and input of a minimum value under a self-adaptive function is sought through an intelligent optimization algorithm by utilizing a corresponding model, so that an optimal control parameter combination is obtained. Edge end resources are fully utilized to perform data preprocessing, control parameter matrix storage and control parameter transmission, so that the cloud computing pressure is reduced, the influences caused by data transmission delay are reduced, accordingly, the effect of rapid real-time updating and optimization control is achieved, and actual operation data can be well fitted; and under the condition that basic loads are met, the energy consumption of the whole system is obviously reduced.

The invention discloses an apparatus for manufacturing molded articles, which adopts a movable pouring injection nozzle, and can be used for molding all the articles by using the liquid resin. The elevated pouring injection nozzle(15) used for feeding the movable liquid resin is disposed in a penetrating channel (19) in a lower die (11).By adopting a pouring injection nozzle driving mechanism (16), the pouring injection nozzle (15) can be lifted to an opening (23) of a supporting body (22) of the lower die (11), and therefore a resin channel (24),a pouring opening (25), and an opening (23)are communicated with each other, and the liquid resin can be injected in a cavity (17) of an upper die (7). The hard resin can be formed by hardening the liquid resin, and the resin packaging of a chip element (21) of the supporting body (22). The pouring injection nozzle (15) is lowered, and the pouring opening (25) of the pouring injection nozzle (15) can be separated from the hardening resin. The refrigerant flowing on the outer side of the wall of the resin channel (24) can be provided for the pouring injection nozzle (15) after being cooled.

The invention relates to a device and method for detecting voltages of a direct current bus of a variable frequency speed regulator. The device comprises a voltage dividing and current limiting clamping circuit, a differential input amplification circuit and a proportional amplification circuit. The voltage dividing and current limiting clamping circuit is used for converting the voltages of the direct current bus to millivolt-level voltage signals through voltage dividing and current limiting, and then introducing the millivolt-level voltage signals to the differential input amplification circuit. The differential input amplification circuit is used for amplifying and restoring the introduced millivolt-level voltage signals to volt-level voltage signals and then introducing the volt-level voltage signals to the proportional amplification circuit. The proportional amplification circuit is used for restoring the introduced volt-level voltage signals to actual values of the voltages of the direct current bus, and outputting the actual values of the voltages of the direct current bus to a control panel of the variable frequency speed regulator. Through the redesign of the device for detecting the voltages of the direct current bus, a detection circuit for the voltages of the direct current bus of the variable frequency speed regulator is simplified, the real-time performance, the stability and the precision of detection are improved, and a deviation correcting function is also achieved.

The invention discloses a method for measuring a rare earth-doped double clad fiber absorption coefficient. In the method, measured fiber length is changed; the spectral difference of the measured fiber under pump light is acquired by utilizing a spectrometer difference method; and the absorption coefficient is obtained by calculating according to the spectrometer difference. The method realizes the accurate and direct measurement of the rare earth-doped double clad fiber absorption coefficient and solves the problems of complicated light path construction, comprehensive operation steps and low accuracy of a measuring result by adopting a simple operation method.

In the field of LED lighting for use in plant cultivation, the dominant light source is a colour blend of red and blue light. However, because the luminescence intensity of red is weaker than that of blue, at present, the colour is adjusted by means of the number of lamps used. Thus, a small number of blue LEDs are interspersed among a large number of red LEDs, and the inability to make the blue illumination uniform presents a problem. Disclosed is a multicolour light emitting diode lamp wherein a blue LED and a balancing AlGaInP red LED, having a high light emission efficiency, are built-into the same package. The in-built red LED comprises a light emitting section containing a light emitting layer formed from the composition formula: (AlXGa1-X)YIn1-YP(0<=X<=1, 0<Y<=1). When a uniform current is applied, the red LED emits at least as many photons as the blue LED. In adapting the device for plant cultivation when a strong red light is desirable, the desired colour blend can be obtained with one lamp and it is possible to make the illumination of the light uniform, by installing two red LEDs and one blue LED in the device.

A talkback door bell handset apparatus is provided which can arrange a talkback door bell handset in an outer box to unitize the handset and can mount the handset in an outer shell used for presenting the appearance of the handset apparatus. The invention prevents the rainwater from intruding the unitized handset in the outer shell not in the handset so as to realize simplification of the structure and assembly and the simple whole apparatus. The apparatus is provided with a talkback door bell handset arranged in an outer box made of synthetic resin, a long rectangle outer shell made of synthetic resin with opening backside, and circumferential walls around the left and right and the upper side and the lower side formed by extending from the periphery of a front panel to the backside. A receiving part enclosed by the circumferential walls is formed at the lower part of the backside of the front panel, and the outer shell will not project from the circumferential walls to the backside at the status of being carried and clamped by a lower supporting part. A water drop removing eave, which is in hill type and projecting from the front panel to the backside, covers the talkback door bell handset received in the receiving part from the upside. Water discharge grooves are formed among the left end and the right end of the eave and the left side and the right side of the circumferential walls. A water discharge part formed by cutting a break on the circumferential walls is formed on the bottom side of the circumferential wall corresponding to the lower support part.