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317 results about "Simple type" patented technology

Method for controlling slip mode variable structure of brushless direct current motor based on power exponential reaching law

The invention provides a method for controlling a slip mode variable structure of a brushless direct current motor based on a power exponential reaching law. The method comprises the following steps of S1, analyzing a mathematics model of the brushless direct current motor; S2, designing a slip mode controller; combining a power reaching law and an exponential reaching law, so as to obtain the improved reaching law-power exponential reaching law, and calculate the slip mode control rate at the current time; S3, setting a current loop and a speed loop for controlling the brushless direct current motor, wherein the current loop adopts the integral and proportional control type, and the speed loop adopts the slip mode variable structure control type using the power reaching law; S4, repeatedly updating the value of slip mode control rate i, so as to control the brushless direct current motor. The method has the advantages that the control quantity on the brushless direct current motor adopts three adjustable parameters, so that the control and adjusting are more flexible; a control strategy with high control quality, simple type and convenient implementing on the brushless direct current motor is provided.
Owner:NANJING UNIV OF INFORMATION SCI & TECH

Serializing device and serializing method

ActiveCN102981884AImprove versatilityImprove the efficiency of serializationProgram controlMemory systemsComplex typeParallel computing
The invention provides a serializing device. The serializing device comprises a first judgment unit, a first conversion unit, a first acquisition unit, a calculation unit and a memory unit, wherein the first judgment unit is used for judging whether a source object belongs to a preset simple type; when the source object belongs to the preset simple type, the state information of the source object is converted into to-be-stored data by the first conversion unit; when the source object belongs to a preset complex type, the first acquisition unit is used for acquiring non-empty attributes in the source object, generating relative description data according to the attributes and buffering the description data to a temporary byte stream; the calculation unit is used for calculating the sum of the byte stream length of the description data and the byte stream length of result data; and the memory unit is used for saving the to-be-stored data to a target byte stream, serializing the byte stream length of the source object to the target byte stream and saving the description data and the result data to the target byte stream. The invention further provides a serializing method. Through the technical scheme of the invention, the serializing universality can be improved, the serializing efficiency is increased, and memory space occupied by the data after serializing is reduced.
Owner:YONYOU UP INFORMATION TECH

Bipolar zero position and gain adjustable amplifier and analog signal conditioner

The invention relates to a bipolar zero position and gain adjustable amplifier and an analog signal conditioner, in particular to a voltage amplifier with adjustable amplification factor positive-negative bipolarity and adjustable zero position and an analog signal conditioner with temperature compensation and non-linear correction realized by adopting an operational amplifier, belonging to the field of signal conversion operation and automatic control. The bipolar gain adjustable amplifier has a voltage type, a simple type, a current type, an attenuation type, a uniform adjustment type, a separate adjustment type and the like; the amplifiers of the voltage type, the simple type, the current type and the attenuation type adopt a single operational amplifier circuit; the amplifiers of the uniform adjustment type and the separate adjustment type adopt a double-operational amplifier circuit; and the analog signal conditioner consists of a zero position temperature shift adjuster and a magnification adjuster. The bipolar gain adjustable amplifier is the foundation for forming the bipolar zero position gain adjustable amplifier and the analog signal conditioner. The invention has wide application range and relatively high use value.
Owner:SHANGHAI UNIV

Combined display unit of energy-saving and innovative light-emitting diode (LED) display screen

The invention relates to a combined display unit of an energy-saving and innovative light-emitting diode (LED) display screen,. The combined display unit comprisinges a module mounting strip combination unit, LED display modules, a first electrical box and a lower frame, wherein the module mounting strip combination unit is formed by N module mounting strips which are parallel to one another and are arranged vertically; the LED display modules are arranged at the front sides of the module mounting strips; the first electrical box is arranged at the upper side of the module mounting strip combination unit and is also used as an upper frame; the lower frame is positioned at the lower side of the module mounting strip combination unit; the first electrical box is internally provided with alternating current (AC)/ direct current (DC) conversion power supplies and a signal receiving system. In order to solve the problem of difficult power configuration of a high-power combined display unit, the lower frame of the combined display unit is also used as a second electrical box, and the second electrical box is provided with AC/ DC conversion power supplies; aiming at a low-power combined display unit, the lower frame is a simple type lower frame. Compared with the prior art, the combined display unit is modularized, and can normally work only by ventilating a screen body or installing a ventilation device without being cooled by an air conditioner. The combined display unit of the energy-saving and innovative LED display screen has the advantages of being light in weight, low in cost, high in accuracy, easy to manufacture as well as simple and attractive in appearance, and increases manufacturing efficiency and installation efficiency.
Owner:方迪勇

On-line fault diagnosis device and on-line fault diagnosis method of simple-type environmental control system

The invention discloses an on-line fault diagnosis device of a simple-type environmental control system, which comprises temperature sensors A, B, C and D and a fault display, wherein the temperature sensors A and B are respectively arranged at a hot side inlet and a hot side outlet of a heat exchanger; the temperature sensors C and D are respectively positioned at an inlet and an outlet of a turbine; and the temperature sensors A, B, C and D transmit a measured temperature signal to the fault display. An on-line fault diagnosis method of the simple-type environmental control system comprises the following steps: 1, constructing the on-line fault diagnosis device of the simple-type environmental control system; and 2, establishing and training a BP neural network for fault diagnosis. The diagnosis device and the diagnosis method are mainly applied to the on-line fault diagnosis of the simple-type environmental control system, can diagnose typical faults of the simple-type environmental control system in an on-line mode in the flight process to enable pilots to deal with the faults in time and avoid accidents. The on-line fault diagnosis device has few accessories, simple structure, light weight and convenient installation, and is easy to be installed on the conventional simple-type environmental control system.
Owner:BEIHANG UNIV

Method of automatically generating parameter configuration file for LTE (Long Term Evolution) system

The invention discloses a method of automatically generating a parameter configuration file for an LTE (Long Term Evolution) system. The method comprises the steps of: obtaining a message parameter set in a test case; parsing a current message parameter; generating a parameter configuration item of the current message parameter when the current message parameter is of a composite type, writing the parameter configuration item into the current parameter configuration file, then traversing sub-nodes of the current message parameter to respectively generate parameter configuration items of the sub-nodes, and writing the parameter configuration items of the sub-nodes into the current parameter configuration file orderly; and generating the parameter configuration item of the current message parameter when the current message parameter is of a simple type, and writing the parameter configuration item into the current parameter configuration file. According to the method of automatically generating the parameter configuration file for the LTE system, the parameter configuration file required in a consistency protocol test process of the LTE system can be generated so that the work load of testing personnel is reduced and the test preparation time is shortened so as to accelerate the test progress. The invention further discloses an LTE consistency protocol test method.
Owner:BEIJING ZHONGCHUANG TELECOM TEST

Metal-boron-nitrogen-hydrogen hydrogen storage material and preparation method thereof

InactiveCN102556969AFacilitate solid state reactionUniversalMonoborane/diborane hydridesHydrideInorganic chemistry
The invention relates to the field of hydrogen storage technique and new material synthesis, particularly discloses a metal (M)-boron(B)-nitrogen(N) hydrogen storage material and a preparation method thereof, for solving the problems complicated process, high cost, simple types of synthetic materials, difficulties in regulating and controlling the amount of ammonia complexes in the prior art. The preparation method comprises the following steps: in the presence of inert atmosphere, putting powdery ammonia borane (NH3BH3) with metal (M) or metal hydride (MHx) in a ball milling pot as a reaction vessel according to the mole ratio, adding a cover for sealing, then carrying out vacuum pumping and ammonia gas inflationon for replacement on the ball milling pot for several times, and finally carrying out ball milling under the proper amount of responsive atmosphere of ammonia gas to obtain the metal (M)-boron(B)-nitrogen(N) hydrogen storage material of M(NH2BH3)x.yNH3, wherein x is no less than 1 and no larger than 6, y is no less than 1 and no larger than 10, and the mole ratio of NH3BH3 to M to MHx is 1:1-6:1. The preparation method has the advantages of simple process, low cost, and easy operation, and is suitable for large scale preparation, and the material components can be controlled by controlling the amount of ammonia gas filled in the ball milling pot.
Owner:INST OF METAL RESEARCH - CHINESE ACAD OF SCI

Moveable simple type deep drip irrigation method and device thereof

The invention discloses a portable simple-typed deep drop irrigation method and a portable simple-typed deep drop irrigation device, which belongs to the water-saving irrigation technique. Although the irrigation device of the prior art can resolve the underground drop irrigation problem of the crops in the drought water-shortage area, the structure is complicate and the price is expensive, thereby being difficult to popularize. The invention is to drill holes on the earth near the root of the crop or the tree firstly, and to arrange a water-supply pipe adopting a PE renewable clarinet and being connected with a water accumulation container on the ground, and to use a heated steeple head with a diameter of 2 mm to pass through the wall of the water-supply pipe corresponding to the position of the drill hole to form a connecting hole; after the steeple head is withdrawn, a connector of a medical perfusion tube is inserted into the connecting hole; the other end of the perfusion tube is arranged into the drill hole of the earth after the pin is removed; when opening the water-supply valve, the drop irrigation can be executed. The invention not only overcomes the weakness that the water content on the surface of the earth in the ground irrigation is easy to be evaporated, but also has the advantages of simple equipment, easy material-fetching, less investment, fast efficiency, practicability and easy popularization.
Owner:步新源

River basin ecological water demand integration analysis technology

InactiveCN101865687APracticalAvoid Quantitative Analysis DeficienciesOpen water surveyEcological environmentBasin scale
The invention provides a river basin ecological water demand integration analysis method. Aiming at the problem that ecological water demands of different types in different spaces in a river basin have compatibility so as to cause the total amount of river basin scale ecological water to be hard to determine, the invention divides different ecological water demands into two types of a consumable type and a non-consumable type; according to the upstream and downstream relationship of a river and the link relationship of rivers and lakes, the invention provides six types of river basin ecological water demand integration modes, i.e. simple type, confluence type, split-flow type, combined type, chiasma type and estuary type; according to the maximum value principle and the compatibility principle, the total amount of ecological water demand under the different river basin ecological water demand integration analysis modes is calculated; a calculation result can be directly applied to river basin scale water resource configuration, has an important meaning for determining targets of the comprehensive management of water resources in China and ecological environment restoration and is an ecological water demand calculation method suitable for actual conditions in China.
Owner:BEIJING NORMAL UNIVERSITY
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