49results about How to "Meet the parameter requirements" patented technology

The invention relates to a manufacturing method of aluminum foil used for a 1060 alloy cable. The manufacturing method sequentially comprises the following steps: a. smelting; b. roll casting, controlling the thickness to be 6.8-7.0mm; c. cold rolling and cogging, rolling the thickness to be 3.0-4.0mm; d. intermediate annealing at 500-550 DEG C, and lasting for 20-24h; e. roughing, roughing the thickness to be 0.5mm for longitudinal edge shearing; f. finish rolling, after 2-3 passes, rolling to obtain a finished product with the thickness of 0.18-0.2mm; and g. finished product annealing, adopting a gradient differential temperature annealing method for a low-temperature purging period at 200-220 DEG C with the heat preservation time of 2-4h, an intermediate-temperature oil removal period at 240-260 DEG C with the heat preservation time of 8-10h, and a high-temperature yellow spot removal and mechanical property stabilizing period at 380-400 DEG C with the heat preservation time of 8-10h. The manufacturing method is simple in manufacturing process and low in cost, and can enable the elongation to be greater than or equal to 23% simultaneously when obtaining low tensile strength and completely meet the parameter requirements for the aluminum foil used for high-quality cables.

The invention discloses a frequency domain multi-dimensional parameterized model of a broadband wireless communication channel and a modeling method. The method comprises the following steps: (1) computing and acquiring a real-time frequency domain impulse response of the channel by utilizing transmission signal frequency domain data measured by the wireless communication channel and receiving signal frequency domain acquisition data measured by the wireless communication channel; (2) constructing a channel estimation matching function and a frequency domain parameterized model according to the needed multi-dimensional parameters; (3) searching multiple paths from the real-time frequency domain impulse response of the channel, and initializing multi-dimensional parameters of each of the multiple paths; (4) computing maximum likelihood estimation, and acquiring multi-dimensional parameter values of each of the multiple paths through iterative estimation; and (5) if the multi-dimensional parameter values of each of the multiple paths meet the condition of convergence, stopping the iterative estimation and outputting the finally estimated multi-dimensional parameter values of each ofthe multiple paths, and if the multi-dimensional parameter values of each of the multiple paths do not meet the condition of convergence, returning to the step (4). The invention meets the requirement of high-precision multi-dimensional parameterized modeling of the broadband wireless communication channel, and has the advantages of low realization complexity and high speed of convergence.

The invention relates to a method for generating a drive source of an ultraviolet optical frequency comb. The method comprises the steps of synchronous control of laser and chirped pulse amplification of optical parameters, wherein ultrashort pulses outputted by a laser with stable carrier phase are divided into two beams; one beam is used as signal light to be amplified for chirped pulse amplification of the optical parameters, and the other beam is used for generating synchronous pumping signals through crossed phase modulation or gain selective amplification; picosecond and nanosecond intense pulse laser is taken as a pumping source for chirped pulse amplification of the optical parameters; and ultrashort and ultra-intense laser output is obtained by utilization of compression of grating pairs at an output end for chirped pulse amplification of the optical parameters. The method has the advantages that the method does not need a complex circuit system, can greatly reduce the requirement on the environment and particularly on temperature and vibration, and can obtain the ultraviolet optical frequency comb which has a wider application scope, relatively high power and high repetition frequency and shorter wavelength.

The invention relates to a natural gas hydrate heat transfer performance testing apparatus used in X-ray CT equipment. The invention belongs to the technical field of petroleum scientific research apparatus. The apparatus can be used for simulating in-situ formation of rock core natural gas hydrate, and can be arranged on a rotary object stage of X-ray CT equipment for testing the heat transfer performance. A designed pressure is 0-20MPa, and a designed temperature is -20 to 30 DEG C. For reducing the inferences on X-ray CT equipment imaging, a titanium alloy material is adopted in the integral apparatus. Also, the apparatus is designed as a double-layer sleeved cylinder structure. With an inner cylinder, pressure for natural gas hydrate in-situ formation is ensured. With a circulated cooling agent in the interlayer, the temperature of the inner cylinder is controlled. Multi-point measuring thermal resisters are annularly arranged in the inner cylinder. Signal intensity of collected X-ray CT images and data information acquired by the thermal resisters are analyzed, such that related conclusion of the natural gas hydrate heat transfer performance is obtained. The structure of apparatus is reasonably designed, such that equipment parameter requirements of the apparatus are satisfied. The function is comprehensive, and the operation is simple.

The invention provides a method for obtaining a high-power optical frequency comb. The method adopts at least four levels of fiber cascade amplification and comprises a preamplification system and a main amplification system; the preamplification system comprises at least two ytterbium doped single-mode fiber amplifiers; the main amplification system comprises at least two large mode field ytterbium doped double-coating fiber main amplifiers; and signal laser is injected to a common single mode fiber, is connected with a wavelength division multiplexer (WDM) and is conducted to the preamplification system and the main amplification system for amplification. The method has the advantages that the method amplifies optical frequency comb laser with ultralow average power to over hectowatt magnitude, greatly reduces the requirement on the power of seed optical frequency comb laser, and has a simple structure and convenient operation.

The invention discloses an isolating net piece and a carrier vehicle for loading the isolating net pieces. The isolating net piece comprises an isolating net piece body, a support and an isolating barrier, wherein the isolating net piece body comprises a framework and a net piece arranged on the framework, the support comprises a regulating lever and regulating lever landing legs, is arranged at one side of the isolating net piece body, and is used for supporting the obliquely placed isolating net piece body and regulating the length of the regulating lever according to needs, and the isolating barrier inclining towards the same side is formed by serially connecting a plurality of isolating net piece bodies. The compartment body of the carrier vehicle is formed by a plurality of tank bodies, one isolating net piece is placed in each tank body, the isolating barrier formed by serially connecting the isolating net piece bodies is not easy to damage or incline, can prevent people from climbing and crossing and has a very good blocking effect, handling of the isolating net pieces is convenient and labor-saving, and since the carrier vehicle for loading the isolating net pieces is specially designed, loading of the isolating net pieces is fast, and the transportation process is safe and reliable.

The invention relates to a rack-mounted equipment function module hot plug control system, and discloses a concentrated power supply rack-mounted equipment function module hot plug control system which aims at the defect that a function module hot plug control circuit in the prior art is high in cost. The concentrated power supply rack-mounted equipment function module hot plug control system can reduce the cost on the premise of ensuring good and reliable slow power-on effects of a control function module. The concentrated power supply rack-mounted equipment function module hot plug control system comprises a control circuit and a switching element. The control circuit is connected with drive voltage, the switching element is connected with a voltage input end in series, and a control end of the switching element is connected with the control circuit. The voltage input end is connected with a main power supply of equipment. The control circuit comprises a first resistor, a second resistor and a capacitor. The first resistor is connected with the second resistor in series, the first resistor is connected with the drive voltage, and the second resistor is connected to the ground. The capacitor is connected with the second resistor in parallel, and a non-grounding end of the capacitor is connected with the control end of the switching element. The concentrated power supply rack-mounted equipment function module hot plug control system is mainly applied to communication equipment.

The invention discloses a testing system employing hollow-brick-based heat-accumulating-type heating, and work is divided into four phases. Fuel gas preheating phase: the high temperature fuel gas generated by a methane (or natural gas ) and air burner flows through a heat storage array from top to bottom to store heat in the heat storage array in a relative low rate, the requirements of predetermined initial temperature distribution can be satisfied, then the fuel gas is exhausted through an air outlet; supercharging phase: the burner is stopped, an outlet high temperature valve is closed, ahigh pressure air inlet valve is opened, test high pressure air is filled into a heater through a gas source, slow supercharging is slowly performed on the heater in a controllable rate until a required stagnation pressure condition is realizing; test running phase: the air passes through a heat storage body of the heater from bottom to top, convection heat exchange is generated by air-flow and the heat storage body to obtain heating, and the air-flow horizontally flows out of the heater in the temperature approaching to the temperature of an outlet end of the heat storage body. End phase: after the test is finished, a primary air gas circuit is closed firstly, corresponding blowing is performed, a high temperature rapid valve is closed, and a preparing phase of the next test is started orthe experiment is finished after natural cooling.

The invention discloses a probe for a micro static penetrometer. An outer barrel is a cylinder with openings at two ends, wherein inner threads are arranged at two ends of the inner barrel wall of the outer barrel; a strain barrel is arranged in an inner cavity of the outer barrel; outer threads which are matched with the inner threads of the inner barrel wall of the outer barrel are arranged on a peripheral surface on one opening end of the strain barrel; a strain sheet is arranged on the barrel wall of the strain barrel; outer threads are arranged on the peripheral surface on the lower end of a force guide rod; a limiting boss is additionally arranged on the peripheral surface of the force guide rod; the upper end of the force guide rod is inserted into the inner cavity of the strain barrel; a inner step hole is arranged in a conical head; the conical head is arranged below the outer barrel; a screw plug is arranged on the lower end of the outer barrel; and the lower surface of the limiting boss of the strain barrel is fixed against the top surface of the screw plug. The probe for the micro static penetrometer provided by the invention has the advantages of reducing weight and size of the static penetrometer, being capable of miniaturizing the penetrometer, being convenient to carry, being capable of greatly improving working efficiency of detection and the like.

The invention discloses a bipolar all-solid-state LTD square wave pulse generation circuit, which adopts an LTD circuit module, a pulse transformer and a load resistor RL, the LTD circuit module comprises a charging loop, a bipolar push-pull discharge loop, a load loop and a follow current loop, and the output end of the charging loop is connected with the input end of the bipolar push-pull discharge loop, the output end of the bipolar push-pull discharge loop is connected with a primary winding of the pulse transformer, the load loop, the follow current loop and the load resistor RL are all connected to a secondary winding of the pulse transformer, it is guaranteed that in a high-amplitude wide-pulse-width output mode, large overshoot cannot occur to the rear edge of a square wave, and bipolar high-voltage square wave pulses are output on a load. additional circuit is not needed for magnetic core reset, the pulse width of the output square wave can be continuously adjusted within the range from nanosecond to microsecond, the adjusting range of output parameters of the LTD circuit is greatly widened, and the parameter requirement of the tumor tissue irreversible electroporation ablation technology for a square wave pulse power supply can be met.

The invention relates to a charging system of non-slurry pelletizing. The charging system comprises a stander, a storage compartment and a weighing compartment; the storage compartment and the weighing compartment are installed on the stander; the storage compartment is arranged above the weighing compartment; and the charging system also comprises a first control valve and a second control valve, and the first control valve and the second control valve are arranged on a communication pipeline between the storage compartment and the weighing compartment; a feeder is arranged between the first control valve and the second control valve. By adopting the first control valve, the feeder and the second control valve, accuracy in charging can be guaranteed, the parameter requirement of a pelletizing machine can be met, and the working efficiency and the product quality can be improved.

The invention provides a diffusion angle measurement device and measurement method. The device and the method are used for measuring the diffusion angle of a diffusion module. The device comprises a light source module, a projection module, an acquisition module and a measurement and calculation module. The light source module outputs collimating beams to a diffusion module so as to allow the diffusion module to diffuse the collimating beams. The projection module projects the diffused beams passing through the diffusion module. The acquisition module acquires projection images on the acquisition module. The measurement and calculation module determines diffusion angles of the diffusion beams according to the distance between the projection images, the projection module and the diffusion module. According to the invention, the diffusion angles of the diffusion module can be measured in advance, so the diffusion angles are allowed to meet the window parameter requirements and optical energy loss is reduced.

The invention provides a single-cutting forming line for building plates; a reshaping apparatus reshapes a building plate so that the building plate enters a cutting portion from a standard position in a standard direction, a groove cutting apparatus performs groove cutting, a tongue cutting apparatus performs tongue cutting, the building plate is then separated and cut by a separating cutting apparatus into multiple individual building plate units, and each building plate unit has a groove and a tongue, providing assembly functionality; a groove saw set and a tongue saw set may be assembled and arranged optionally in different thicknesses and cross section shapes through groove saw blades and tongue saw blades, thereby cutting grooves and tongues different in size and shape. Therefore, the single-cutting forming line for building plates may form a building plate with a tongue and groove to provide assembly functionality by single cutting, the parameters of the groove and tongue such as size and shape can be changed optionally, the steps are simple, the efficiency is high, cutting quality is good, and the line is flexible and easy to use, novel and reasonable in structure and high in practicality.

An optical pulse position modulating signal receiver and a data processing method thereof are applicable to free space optical communication. The optical pulse position modulating signal receiver consists of a photoelectric multiplier tube, an electric signal processing module and a liquid crystal display, wherein the electric signal processing module consists of an analog digital converter, a first-in-first-out array and a digital signal processor, the photoelectric multiplier tube receives optical signals to convert the optical signals to simulated electric signals, the simulated electric signals are converted into digital signals by the analog digital converter (ADC), are input into a DSP (digital signal processor) through the first-in-first-out (FIFO) array, the DSP performs filter matching, threshold judgment, frame detection and quick RS (radio station) code decoding for the digital signals and transmits corrected information to be displayed on the liquid crystal display. The optical pulse position modulating signal receiver can solve the problem that modulation and demodulation signals can be received on the basis of optical pulse position modulating signals of RS codes under the environment of different signal channels, and is high in computing speed and reliability, convenient in use and fine in expansibility.

The invention provides a power distribution line high-frequency transient characteristic signal generation device and a control method thereof, and the method comprises the steps: a multifunctional mutual inductor collection verification measurement and control communication device converts a received fault characteristic signal file into a current fault simulation signal and a voltage fault simulation signal; a gear control instruction is sent to the program control load box assembly according to the load requirement of a built-in mutual inductor of the tested equipment; an integrated high-voltage voltage and current generation assembly generates a current primary signal and a voltage primary signal according to the current fault simulation signal and the voltage fault simulation signal; and a program-controlled load box assembly adjusts the working gear of the program-controlled load box assembly according to the gear control instruction, so that the program-controlled load box assembly provides an external load for the secondary output of the tested equipment. The high-frequency transient characteristic signal output by the scheme can meet the requirement of power distribution automation equipment for carrying out a small-current grounding fault identification function test.

The invention provides a negative-pressure pressurizing two-stage reversely-installed sealed multiform impeller combination petrifaction process pump and relates to the technical field of centrifugal pump production. An isolation cavity sealing cover is arranged outside a main shaft at the inner side of a suspension frame and at the rear end of a pump cover, a cylindrical isolation sleeve is arranged between the main shaft and the pump cover, an annular boss is integrally arranged at the rear end of the isolation sleeve, the annular boss is arranged between the pump cover 3 and the isolation cavity sealing cover, and a radial through hole is formed in the annular boss; a second-level mechanical sealing device provided with a spring is arranged between the cylindrical isolation sleeve at the inner side of the isolation cavity sealing cover and the main shaft; a frame oil seal is arranged between the isolation cavity sealing cover and the main shaft; a first-level mechanical sealing device provided with a spring is arranged between the cylindrical isolation sleeve and the pump cover; a communicating hole is formed in the center of an impeller gland and the inner end of the communicating hole is arranged at the rear end of an impeller located in the pump cover. The negative-pressure pressurizing two-stage reversely-installed sealed multiform impeller combination petrifaction process pump is capable of saving energy and the phenomenon that power grid power is polluted by higher harmonic waves generated due to the adoption of a frequency conversion device is avoided.

The invention discloses a signal conditioning method and circuit based on linear phase front-end high-speed data collection. The circuit comprises a constant current source circuit, a low-pass filtering circuit, a first differential circuit, a digital determination circuit, an amplification circuit, a second differential circuit and a wavelet de-noising circuit; the digital determination circuit determines digital-analog conversion signals in double paths of differential signals; the wavelet de-noising circuit reduces a wavelet coefficient generated by de-noising and maintains a coefficient of real signals to the largest extent; and the constant current source circuit, the low-pass filtering circuit, the first differential circuit, the digital determination circuit, the amplification circuit, the second differential circuit and the wavelet de-noising circuit are connected sequentially. The method can be used to amplify, filter and process weak signals generated by a sensor, process the phase information more accurate and condition the weak signals; and the circuit can meet requirements for different parameters, satisfy occasions with higher requirement for signal phase via parameter adjustment, and is higher in using value.

The invention discloses a standard prototype screening method for a flat-panel television energy efficiency comparison test, and the method comprises the steps: firstly obtaining three flat-panel televisions with uniform energy efficiency through screening from a batch of flat-panel televisions of the same model under the working conditions specified in the steps S2-1 to S2-3, i.e., three reselection prototypes; step S3 is carried out, simulating the change of the environmental climate to judge whether the energy efficiency of the three reselection sample machines can still keep stable or notafter the environmental climate changes, and finally screening to obtain three flat-panel televisions with uniformity and stable energy efficiency, namely three standard sample machines which can be used for comparing and testing the energy efficiency of the flat-panel televisions; therefore, the three screened standard prototypes can completely meet the parameter requirements for the standard prototypes in the IEC 62087 standard, the accuracy, the stability and the reliability are high, and a foundation is provided for forming a unified flat-panel television energy efficiency comparison teststandard in the flat-panel television industry.

The invention discloses a positioning method compatible with multiple chips, and the method comprises the steps: obtaining a positioning parameter of at least one chip, and transmitting the at least one positioning parameter to a controller of a positioning apparatus acquiring information of a target chip, taking the positioning parameter corresponding to the target chip as a target positioning parameter, and displaying a target parameter name of the target positioning parameter; judging whether the target parameter name matches current positioning hardware currently installed in the positioning apparatus or not; and if the target parameter name matches current positioning hardware, driving the current positioning hardware to execute positioning operation according to the target positioning parameter so as to drive the current positioning hardware to move to the target positioning point. Therefore, the positioning operation compatible with different chips is realized, and the processing capacity of the chips is further improved. In addition, the invention further provides positioning device compatible with the multiple chips, computer equipment and a storage medium.