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33results about How to "Strong application prospect" patented technology

Organic working medium thermal power generation circulating system boosted by aid of gravity

The invention relates to an organic working medium thermal power generation circulating system boosted by the aid of gravity. A working medium outlet of an expansion machine of the system is communicated with a working medium inlet of a condenser via a pipeline, a working medium outlet of the condenser is communicated with an inlet of a liquid storage tank via a pipeline, an outlet of the liquid storage tank is communicated with a working medium inlet of an evaporator via a pipeline, a working medium outlet of the evaporator is communicated with an inlet of a gas storage tank via a pipeline, and an outlet of the gas storage tank is communicated with an inlet of the expansion machine via a pipeline; working medium is an organic matter; the locations of the condenser and the liquid storage tank are higher than the location of the evaporator by 5 meters to 200 meters in a gravity field; and average working temperature of the evaporator is higher than that of the condenser by 30 DEG C to 25 DEG C. A low working condition running characteristic of the organic working medium is combined with the gravity field, required evaporation pressure is provided for the organic working medium by the aid of the gravity, a pump is omitted in total circulation, and the structure is simple; and the organic working medium thermal power generation circulating system realizes simple and high-efficiency conversion between medium and low temperature grade thermal energy and mechanical energy, and has quite high technical feasibility and application prospect.
Owner:UNIV OF SCI & TECH OF CHINA

High-efficiency laser deep penetration welding method for achieving double-side forming of sheet metal through single-side welding

A high-efficiency laser deep penetration welding method for achieving double-side forming of sheet metal through single-side welding is characterized in that a reflection cushion plate is added on the back of the laser welding sheet metal to utilize the reflection cushion plate to reflect instantaneous laser of laser full penetration sheet metal back to a welding area to conduct secondary heating on the welding area to further achieve a double-side forming hourglass-shaped (X-shaped) welding seam through single-side welding. The method is mainly composed of steps of cleaning the surface to be welded, fixing the reflection cushion plate, conducting laser welding on the sheet metal and the like. The method achieves the aim that the single-side welding is conducted on the sheet metal to achieve double-side forming under the low heat input condition, breaks through the defect that the existing sheet laser deep penetration welding can obtain the hourglass-shaped (X-shaped) welding seam only under the high heat input condition, achieves double effects of considering welding seam dynamic performance and controlling heat deformation and heat effects of the sheet and lays a foundation for promotion of wide application of a laser deep penetration welding technology in the sheet metal welding field.
Owner:佛山市金晓宝净化彩板有限公司

Message sending redundancy dynamic regulation method based on linear network coding

ActiveCN103391164AImprove data transmission throughput efficiencyStrong application prospectError prevention/detection by using return channelError ratioRedundancy factor
A message sending redundancy dynamic regulation method based on linear network coding comprises the following steps: (1) after a receiving end receives an encoded message from a sending end, the visibility of the original message is judged firstly, and whether the message is an innovative message or not is determined according to the visibility so as to determine whether a corresponding visible message response RACK is sent or not; (2) in the response message, not only the latest and invisible initial word bit numbers of messages in a decoding matrix are fed back, but also the latest, non-contained initial word bit numbers First_Byte_Uninvolved are fed back; (3) firstly the sending end updates and encodes a buffer zone according to received First_Byte_Uninvolved values, and calculates a difference value Gap between the latest First_Byte_Uninvolved and First_Byte_Unseen, and the sending end dynamically regulates a redundancy factor R according to the change of the Gap so as to enable the R to be dynamically matched with a link circuit error code packet loss rate. The method has the advantage of simple principle, solves the matching problem of the redundancy and the link circuit error ratio, and obtains higher throughput and lower average message delay.
Owner:NAT UNIV OF DEFENSE TECH

Implementation method of high-efficiency Doherty power amplifier based on switching resonant structure

The invention relates to an implementation method of a high-efficiency Doherty power amplifier based on a switching resonant structure. The switching resonant structure for inhibiting the higher harmonic component of an auxiliary power amplifier is arranged behind the auxiliary power amplifier so that the auxiliary power amplifier realizes class E work; the switching resonant structure comprises a switch, and a resistor, a capacitor and an inductor, the three of which are connected with the switch; an inductance value is optimized to enable a signal to resonate under a fundamental frequency, and therefore, a high impedance characteristic is presented to harmonics and an orthogonal relation between the time domain voltage and the current waveform of an ideal class E amplifier is realized. As a result, the efficiency of the Doherty power amplifier is greatly improved under a high linearity condition. The inductance value of the novel switching resonant structure decides the working frequency thereof; the inductance value in the switching resonant structure is reasonably calculated, and meanwhile, the implementation of a zero-current switch of the class E power amplifier is considered to guarantee the implementation of high efficiency performance of the power amplifier within a working frequency range.
Owner:SHANGHAI RADIO EQUIP RES INST

Preparation method of modified organosilicone dephenolized membrane

The invention belongs to the technical field of pervaporation membrane separation and in particular relates to a preparation method of a modified organosilicone dephenolized membrane. The preparation method of the modified organosilicone dephenolized membrane comprises the following steps: firstly, mechanically stirring room temperature vulcanization liquid silicone rubber with a solvent until the room temperature vulcanization liquid silicone rubber is dissolved and a transparent solution is formed; then, adding a crosslinking agent and a catalyst, and mechanically stirring for 5-20 minutes, wherein the mass ratio of the room temperature vulcanization liquid silicone rubber to the solvent to the crosslinking agent to the catalyst is 33:60:5:2; then adding oleic alcohol the mass of which is 1%-5% of that of the room temperature vulcanization liquid silicone rubber, mechanically stirring for 2-10 minutes, and uniformly mixing; and finally, casting the obtained solution on a supporting basement membrane to form a membrane, standing at room temperature for 4-5 hours, and then drying the membrane in a vacuum drying oven at the temperature of 60-80 DEG C for 8-12 hours. A preparation process of the modified membrane is simple and easy, and the obtained membrane has good comprehensive performance of separating phenol from water when being used for separating a phenol/water mixture; permeation flux of the membrane can be 526g.m<-2>.h<-1>, and a separation factor of the membrane can be 8.63; great potential in industrialized application is shown.
Owner:BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY

High-linearity Doherty power amplifier implemented by double-negative ferroelectric material

The invention discloses a high-linearity Doherty power amplifier implemented by a double-negative ferroelectric material. The high-linearity Doherty power amplifier comprises a main power amplifier module and an auxiliary power amplifier module which are connected in parallel, wherein an input end of the main power amplifier module corresponds to an input end of the Doherty power amplifier; an output end of the auxiliary power amplifier module corresponds to an output end of the Doherty power amplifier; a phase-shifting module is connected in series between an input end of the auxiliary power amplifier module and a main input end of the Doherty power amplifier; a double-negative ferroelectric structure for compensating for AM-PM distortion of the auxiliary power amplifier module under a high power condition is connected in series between an output end of the main power amplifier module and a main output end of the Doherty power amplifier; and an adjustable direct-current bias is introduced into the double-negative ferroelectric structure. Through adoption of the high-linearity Doherty power amplifier, an electromagnetic bandgap property and a slow-wave effect of the double-negative ferroelectric material structure are utilized, so that a required phase can be obtained by adjustment of the double-negative ferroelectric structure.
Owner:重庆嘉旦微电子有限公司

Post-distortion linearized Doherty power amplifier based on ferroelectric capacitor

ActiveCN105915182AAchieve Gain Compression Distortion CompensationAchieve high linearityAmplifier modifications to reduce non-linear distortionAmplifier modifications to raise efficiencyCapacitancePhase shift module
The invention discloses a post-distortion linearized Doherty power amplifier based on a ferroelectric capacitor. The power amplifier comprises a main power amplification module and an auxiliary power amplification module which are connected in parallel, wherein input ends of the main power amplification module and the auxiliary power amplification module are taken as a total input end of the Doherty power amplifier; a phase shift module is connected in series between the input end of the auxiliary power amplification module and a part input end; a phase shift module is connected in parallel between an output end of the main power amplification module and an output end of the auxiliary module; the output end of the main power amplification module is compensated by the phase shift module and then synthesized with the output end of the auxiliary power amplification module to form total output; the ferroelectric capacitor is connected in series between the input end of the auxiliary power amplification module and the phase shift module; and the ferroelectric capacitor is connected to an adjustable direct-current bias voltage. The power amplifier disclosed by the invention is characterized in that the direct-current bias voltage of the ferroelectric capacitor is changed, so that source-pull matching of the auxiliary power amplification module can be adjusted, and thus gain-compression distortion compensation can be implemented to main power amplification output.
Owner:重庆嘉旦微电子有限公司

Preparation method of modified polyurethane-organosilicon double layer pervaporation membrane

The invention relates to a preparation method of a modified polyurethane-organosilicon double layer pervaporation membrane, and relates to the field of pervaporation membrane separation. The pervaporation membrane comprises two layers; an organosilicon film layer is a surface layer, a polyurethane film layer added with a modifier is a sub layer; (1) the polyurethane film layer is prepared as follows: polyurethane PU particles are put in solvent DMAc to obtain a solution, the mass of the PU particles accounts for 10% of the total mass of the solution, the modifier is added, and mechanically stirred to dissolve; and the film is formed by curtain coating and then dried; (2) the organosilicon film layer is compounded as follows: PDMS is added to a solvent, and cross-linking agent tetraethoxysilane and catalyst dibutyltin dilaurate are added, and stirred at 30 DEG C for 10-15min to dissolve until the mixture is viscous; and a casting solution is scraped on a the modified PU film prepared in the (1), statically placed at room temperature and dried. The modified polyurethane-organosilicon double layer pervaporation membrane has good separation performance for phenolic compounds in water. Both the permeation flux and the separation factor are improved, compared with that of unmodified PU film and a single layer PU membrane.
Owner:BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY

Knitting process finished product suspension durability testing device and method

PendingCN110823676AIt is convenient to statistically grasp the tensile recovery performanceSimple structureMaterial strength using tensile/compressive forcesProcess engineeringTimer
The invention relates to the field of soft package product measuring equipment and particularly relates to a knitting process finished product suspension durability testing device and method. The device comprises a support table, a deformation detection mechanism which is arranged on the support table and is used for detecting the deformation of a soft package product to be measured, and an electronic scale which is arranged on the support table and is used for weighing the soft package product to be measured, wherein the deformation detection mechanism comprises a tension meter for applying tension to the soft package product to be detected, and a timer for timing the working state of the tension meter. The testing device and method have the advantages of simple structure, novel and reasonable design, convenience in use and low cost, the durability of a knitting process semi-finished product sample during stretching and hanging can be tested, so the stretching recovery performance ofthe sample can be conveniently counted and mastered, a process finished product better meets the requirement of a soft packaging environment, the practicability is high, and the application prospect is good.
Owner:郑州市君芝友纺织品有限公司 +1

Pre-distortion Doherty power amplifier based on variable capacitance diode loaded composite right/left hand transmission line

The invention relates to a predistortion Doherty power amplifier based on a variable capacitance diode loading composite right/left hand transmission line, and belongs to the field of microwave circuits. The powe amplifier comprises a power divider, a predistortion module, a main power amplifier module, an auxiliary power amplifier module and a phase shift module; the input end of the power divider is a total input end, and the output end of the power divider is respectively connected with the input ends of the pre-distortion module and the main power amplifier module; the output end of the pre-distortion module is connected with the input end of the auxiliary power amplifier module; the output end of the main power amplifier module is connected with the phase shift module, and then the output end of the main power amplifier module and the output end of the auxiliary power amplifier module are combined into a total output end. According to the invention, the gain compression characteristic of the auxiliary power amplifier is well compensated, the phase distortion of the main power amplifier and the auxiliary power amplifier is corrected, the nonlinear distortion of the auxiliary power amplifier can be flexibly improved, and the linearity of the whole Doherty power amplifier is improved.
Owner:CHONGQING UNIV OF POSTS & TELECOMM

Template-method dyeing method for metal surfaces

ActiveCN105671620ASimple processUniform and rich colorElectrophoretic coatingsTime rangeAlcohol
The invention provides a template-method dyeing method for metal surfaces. The method includes the steps that a metal workpiece is polished with abrasive paper to be smooth; the metal workpiece is placed into ethyl alcohol-acetone mixing liquid after washed with water so as to be subject to ultrasonic treatment; then the metal workpiece is placed into electrophoresis liquid after washed with water, and electrophoresis is carried out with the metal workpiece as a positive pole and stainless steel as a negative pole at the normal temperature, wherein the voltage ranges from 1 V to 50 V, and the electrophoresis time ranges from 1 min to 60 min; the metal workpiece obtained after electrophoresis is directly placed into corrosion liquid -to be corroded for 1 min to 120 min; the corroded metal workpiece is thoroughly washed with water, dried and placed into dye liquor to be soaked for 1 min to 30 min, and then the metal workpiece is taken out, thoroughly washed with clean water, and placed into boiling water for hole sealing for 10 min to 30 min; and then the metal workpiece is taken out and dried, and finished products are obtained. By means of the dyeing technology, according to the design of characteristics of most of metal, the beneficial effects of being simple in processing technology, low in temperature, environment-friendly, less in energy dissipation, high in efficiency and even and abundant in color are achieved, and the wide application prospect is achieved.
Owner:ZHEJIANG UNIV OF TECH

Method for analyzing sulfur-containing compound in liquefied gas

The invention discloses a method for analyzing the sulfur-containing compound in liquefied gas. The method adopts a gas chromatography-sulfur chemiluminescence detector, and comprises: (1) sample collection; (2) sample determination: feeding liquefied gas in a liquid state into a gas chromatograph through a high-pressure liquid sample injection valve, and obtaining a sample detection spectrum through a sulfur chemiluminescence detector; (3) qualitative analysis: comparing the sample detection spectrum to the sulfur standard substance retention time database obtained under the same sample determination chromatography conditions, and determining the type of the sulfur compound in the liquefied gas according to the retention time; and (4) quantitative analysis: selecting an organic sulfide asan external standard substance, determine the quantitative response factor under the sample determination chromatography conditions, integrating the peak area of the sulfur compound in the detectionspectrum, and obtaining the sulfur content corresponding to the peak area of the sulfur compound according to the quantitative response factor. According to the present invention, with the method, thecontent and the composition of the sulfur-containing compound in the liquefied gas can be accurately analyzed, and the accuracy of the quantitation is high.
Owner:PETROCHINA CO LTD +1

Formula and preparation method of marble saw mud flotation oxides

The invention discloses a formula and a preparation method of marble saw mud flotation oxides. The preparation method comprises the following steps: S1, preparing a mixed material; S2, conducting heating and saponifying: firstly, weighing a certain amount of the mixed material A, putting the mixed material A into a reaction kettle, and then sequentially and separately adding water and solid sodium hydroxide; and S3, compounding a mixed fatty acid and a surfactant: in a reaction kettle, adding terpilenol, a TX emulsifier and sodium carbonate into the mixed material B in proportion, and conducting stirring for one hour at the temperature of 95 DEG C. A reagent in the formula is good in water solubility, good in dispersing effect and high in collecting capacity, so that the collecting performance of the agent is improved, agent consumption is reduced, and the flotation cost is saved; and the reagent in the formula is good in selectivity, the whiteness of flotation products is improved, and the advantage of performance complementation of high-carbon-chain fatty acid and low-carbon-chain fatty acid is fully exerted by utilizing the performance characteristics of the high-carbon-chain fatty acid and the low-carbon-chain fatty acid. The reagent in the formula is suitable for high-concentration fine fraction flotation, the flotation efficiency is improved, and huge economic benefits are brought to enterprises.
Owner:WEIFANG VOCATIONAL COLLEGE

Pipeline safety comprehensive supervision method in combination with spatial information

The invention relates to a pipeline safety comprehensive supervision method in combination with spatial information. The method comprises the following steps: a step of constructing a pipeline safety supervision knowledge graph, namely a step of collecting pipeline data according to a pipeline safety comprehensive supervision business process, performing knowledge modeling and knowledge extraction on the collected pipeline data to construct the pipeline safety supervision knowledge graph, performing extraction and conversion on the collected pipeline data to obtain pipeline space data and attribute data in the pipeline safety supervision knowledge graph complement each other, and forming the knowledge graph fusing the pipeline space data, the pipeline attribute data and each piece of pipeline business data; and a step of a data query or data analysis, namely a step of receiving a pipeline safety comprehensive supervision service instruction, performing data query or data analysis operation in the knowledge graph according to the service instruction, and returning a service analysis result to the user side in a visual form. According to the method, underground pipeline multi-source resource information integration is effectively promoted, pipeline safety comprehensive supervision services are organized in order, and the method has a relatively strong application prospect.
Owner:航天海鹰机电技术研究院有限公司

Star sensor optical axis thermal drift evaluation method used in vacuum cryogenic environment

PendingCN114440924AEffectively evaluate the degree of impactImproving Thermal Stability Measurement AccuracyNavigation by astronomical meansSpecial data processing applicationsThermodynamicsHeat flow
The invention relates to a star sensor optical axis thermal drift evaluation method used in a vacuum cryogenic environment, and belongs to the technical field of optical instruments. The method comprises the following steps: installing a tested product in an external heat flow simulation system, and carrying out external heat flow simulation implementation on a tested star sensor according to a space external heat flow condition needing to be simulated; starting the star sensor, realizing simulation of external heat flow under different working conditions by controlling the working condition parameter setting of the external heat flow simulation system, and simultaneously collecting four elements of the attitude of the star sensor under different working conditions; k-order polynomial fitting is carried out on the attitude quaternion of the tested product collected in the testing process, and the k-order polynomial fitting is used as a theoretical value of the attitude quaternion; and carrying out cross multiplication on the attitude quaternion of each sampling point and the fitted attitude quaternion, and calculating an error quaternion. The optical axis thermal drift index evaluation problem of the star sensor in the ground environment is solved.
Owner:BEIJING INST OF CONTROL ENG

Heating processing device and processing technology for manufacturing pressure dies

The invention relates to the technical field of pressure dies, in particular to a heating processing device and a processing technology for manufacturing the pressure dies. The heating processing device comprises a workbench, an electromagnetic induction heater and a station, wherein the electromagnetic induction heater is arranged on the workbench, and the station is arranged on the workbench and is used for holding the pressure die to be heated; heat treatment is carried on the pressure die to be heated through the electromagnetic induction heater, and the inner diameter of an inner cavity of a die sleeve in the pressure die is larger than the outer diameter of a die core by virtue of heat expansion and contraction principle, so that the die core is inserted into the inner cavity of the die sleeve or the die sleeve and the die core in interference fit are separated from each other. According to the heating processing device and the processing technology for manufacturing the pressure dies, the structure is simple and compact, and the design is novel and reasonable; the electromagnetic induction heater is used for carrying out heating treatment on the die sleeve of the pressure die, so that high heating speed is achieved, smooth and continuous temperature distribution change of the inner wall of the die sleeve of the pressure die is ensured, thus achieving small temperature difference, uniform heating and easy control so as to be suitable for manufacturing large-batch pressure dies; in addition, the manufacturing can be completed by a single person, thus improving the production efficiency and quality of the pressure dies and having strong practicability and good application prospect.
Owner:HENAN HENGXING SCIENCE & TECHNOLOGY CO LTD
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