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645 results about "Mature technology" patented technology

A mature technology is a technology that has been in use for long enough that most of its initial faults and inherent problems have been removed or reduced by further development. In some contexts, it may also refer to technology that has not seen widespread use, but whose scientific background is well understood. Its performance characteristics are also expected to be well understood with well-established design specifications.

System for multimedia recognition, analysis, and indexing, using text, audio, and digital video

A new system design of multimedia recognition, processing, and indexing utilizes several new researches and technologies in the field of multi-media processing. The system integrates mature technologies being used in video security surveillance, media post-production, digital video storage and management, military visual and tacking technologies. The system makes unique integration of these existing, new, and upcoming technologies that have not been used in this combined fashion before, therefore providing new usage and applications beyond the simple sum of the functions of each technology. These technologies as components in a system that is open standard, and therefore can improve itself by modifying and replacing the technology components. The design of the system targets primarily heavily produced media contents from news, entertainment, and education and training, but not limited to these contents. Other digital contents, from live broadcast, to web broadcast, to home video, web cam, etc. can certainly use many different components of the system, and to utilize the open standard platform for various usages.
Owner:SHEN TONG

Method for sequentially processing consumer waste

The invention discloses a method for continuously treating domestic garbage, more specifically belongs to a method for continuously treating domestic garbage according to the process flows of pretreatment, crushing, dehydration, drying, cracking, incineration, etc. Dioxin C2H4O2 is not produced in the garbage treatment process; and the method can realize various requirements of massive and continuous treatment, reclamation (the energy in the garbage is stored in a manner of collecting hydrocarbon oil), energy saving, environmental protection, high efficiency, and the like, in domestic garbage treatment. The devices adopted in the method belong to standardized commodities for industrial use, and have the advantages of reliable operation, mature technology, simple structure and low investment. The method of the invention belongs to the continuous garbage treatment process, can completely and thoroughly implement reduction, harmless treatment and reclamation of mountains of domestic garbage, and is characterized by good novelty, creativity and industrial applicability.
Owner:北京康乔世纪环境科技有限公司 +1

Pressure cooker with steam detector and matched electric heating stove

The invention discloses a pressure cooker equipped with a steam detector and the matching electric heating stove. It combines the mature wireless transceiver technology with the steam detection technology. Detectors of temperature, humidity, flow velocity, and flow changes of steam flowing into the atmosphere through exhaust pipes and pressure limiting valves in different boiling states of liquids, providing stable, reliable, and accurate data signals for electric heating stoves equipped with matching wireless transceiver systems , realize the intelligent control when the ordinary pressure cooker is used with the electric heating stove, improve the performance of the electric heating stove, expand the application range of the electric heating stove, and effectively eliminate the safety hazard of using the pressure cooker on the electric heating stove.
Owner:谢勇

Intelligent venous transfusion monitoring system

The invention provides an intelligent venous transfusion monitoring system, which comprises a PC, a ward-level controller, sickbed-level controllers, infusion supports and a handheld alarming device, wherein the ward-level controller is arranged according to a ward number; the ward-level controller performs wireless communication with the sickbed-level controllers correspondingly arranged in the ward with the ward number; the ward-level controller is connected with the PC by an Ethernet for communication; and each infusion support is provided with a sickbed-level controller correspondingly. The system has the advantages of realizing 24 hour monitoring, avoiding errors made by medical-care personnel due to mistake or fatigue, reducing the labor intensity of the medical-care personnel and making up for the disadvantage of incapability of the medical-care personnel for 24 hour monitoring. In the invention, the real-time monitoring of the whole infusion state as well as abnormal condition alarming and management is realized, and the combination of infusion and ward emergency call and ward management systems. The monitoring system has high feasibility and is built on the basis of mature technology of sensors, electromagnetic valves, wireless communication, Ethernet communication, singlechips and the like.
Owner:SHENZHEN POLYTECHNIC

Preparation and application of amphiphilic polysaccharide conjugate and medicinal compositions thereof

The invention relates to preparation and application of amphiphilic polysaccharide conjugate and medicinal compositions thereof with anti-tumor activity and biodegradability. The conjugate has amphiphilicity by using alkylenediamine as a connecting arm and introducing hydrophobic segmer, namely a carboxyl-containing anti-tumor medicament, on a polysaccharide framework, and are formed into nanometer micelles by self-assembly in water. The invention is characterized in that 1) the anti-tumor medicament is physically coated by a hydrophobic inner core consisting of hydrophobic groups so as to remarkably improve the solubility of the anti-tumor medicament; and 2) the anti-tumor medicament obtained by chemical conjugation and physical coating can jointly achieve treatment effect and improve medicament action. The polysaccharide conjugate and the medicinal compositions thereof can be used for injection, oral administration, external use or mucosa administration. The invention has the advantages of simple preparation method, mature technology, high yield, and suitability for large-scale continuous production.
Owner:CHINA PHARM UNIV

Propellant depot in space

A space transportation propellant depot has multiple locations, sources and capabilities. Maximizing known mature technologies coupled with realistic industrial techniques results in the incremental development of a propellant source on the moon. Propellant depots are economically driven locations with defined services, sources of propellant and innovation in the pursuit of transportation related commerce as mankind explores for resources beyond Earth.
Owner:TAYLOR THOMAS C +2

Polyimide fibre containing benzimidazole structure and preparation method thereof

The invention discloses polyimide fiber with benzimidazole structure, which is characterized in that the infrared spectrum of the fiber is provided with character absorption peaks of imide ring of 1776-1774cm<-1>, 1726-1722cm<-1> and 1378-1373cm<-1> within the wave number range of 1300-1800cm<-1> and N-H functional group absorption wide peaks in the imidazole structure within the wave number range of 3000-3750cm<-1>. The tensile strength is 0.73-1.53GPa. The initial modulus is 45.2-220GPa. The invention also provides a preparation method of the fiber. The fiber disclosed by the invention contains the benzimidazole structure with secondary amine hydrogen. Therefore, compared with PMDA-ODA polyimide fiber prepared with the same process, the tensile strength can be improved by nearly three times at the most, the initial modulus can be improved by more than twenty times at the most, and the heat resistance is further improved. The preparation method provided by the invention has the advantages of mature technology and easy control. The cost can be kept at a relative low level.
Owner:SINOSELEN HI TECH

Failure automatic diagnosis and separation apparatus and method for power distribution network overhead line

InactiveCN101483337ARealize automatic restoration of power supplyFind quicklyFault locationArrangements responsive to excess currentMature technologyPower grid
The present invention discloses a apparatus and method for automatic isolation of fault section of short circuit fault of power distribution network overhead network and single-phase earth fault, and power supply automatic recovery of non-fault section, which is suitable for power distribution network electric network overhead network of 3-10kV. The principle of automatic isolation and power supply automatic recovery is as following: mount a plurality of voltage type recloser on the overhead network to separate the network into a plurality of sections; when fault occurs, a relay protection device or a line selection device transmits signal to automatically break off or close a faulty line outlet breaker according to preset delay time and action sequence, and then coordinate with the network recloser; determine fault section through one time reclosing; isolate fault section through secondary reclosing and then recover power supply in non-fault section. At the same time, a detection terminal installation mounted on a substation can automatically judge section where the fault in, and transmit the fault message to a scheduling background while transmitting to designated customers in short message way. The present invention is provided with mature technology and high reliability.
Owner:BEIJING SHENGHUAHONGYE TECH

Broadband wave-adsorbing and scattering adjustable metasurface

InactiveCN109904623ADynamic adjustment of vertical reflectivityVertical reflectivity can be dynamically adjusted in real timeAntennasMature technologyBroadband
The invention discloses a broadband wave-adsorbing and scattering adjustable metasurface. The metasurface is formed by the periodic arrangement of the same units, wherein each unit consists of an upper-layer metal structure, an active device, a middle-layer medium and a lower-layer metal backboard; a PIN diode is welded to the corresponding position of the upper-layer metal structure; the upper-layer metal structure is positioned above the middle-layer medium; and the middle-layer medium is positioned above the lower-layer metal backboard. The bias voltage of the metasurface PIN diode is changed to realize the switching of a wave-adsorbing mode and a scattering mode, wherein the wave-adsorbing mode is characterized in that the vertical reflectivity of the metasurface in a 8-10GHz frequencyband is dynamically adjustable; and the scattering mode is characterized in that the reflection phase difference of two working states of "on / off" of the unit PIN diode 8-10GHz frequency band is 180+ / -20 degrees, a reflection amplitude difference is smaller than 1dB, and different electromagnetic codes are input into the metasurface through a FPGA (Field Programmable Gate Array) control system torealize the dynamic regulation and control of a scattering directional diagram. The designed metasurface has the advantages of simple structure, mature technology and low energy consumption and has agood application prospect in the fields of military and civil use.
Owner:SOUTHEAST UNIV

Interactive traffic navigation method based on wireless communication network and system

InactiveCN102402864AComprehensive Traffic ConditionsHave a comprehensive grasp of traffic conditionsInstruments for road network navigationRoad vehicles traffic controlTime extensionDriver/operator
The invention relates to traffic navigation technology, and discloses an interactive traffic navigation method based on a wireless communication network and a system, which aims to overcome shortcomings that the prior art is lack of input of traffic road condition information in a region and bidirectional information interaction during traffic navigation, accordingly, navigation paths are not ideal, traffic jam sections cannot be effectively avoided, travel time of vehicles is prolonged, and the requirement of travel by driving cannot be met. By the aid of the interactive traffic navigation method and the system, traffic management efficiency and reasonableness of navigation paths are improved. The interactive traffic navigation method and the system are based on current mature technology or technology which is already applied, and realize visual display of road traffic conditions for drivers of vehicles, forward jam sections can be avoided as much as possible by means of dynamic comparison and optimization of various driving paths from the current location to a destination of a vehicle, a part of a vehicle flow is properly dynamically split according to time sequence of arrival time to a certain place of vehicles in the same direction, optimal driving paths of the vehicles are scientifically planned, accordingly, traffic participation initiative of the drivers of the vehicles is effectively improved, and the purpose of dynamic and intelligent traffic navigation is realized.
Owner:叶朝晖

Method for face recognition

The invention relates to a method for face recognition. The method comprises: a. an image acquisition module; b. an image preprocessing module; c. a face positioning module; d. a feature extraction module; and e. a recognition module. The method for face recognition in the invention uses relatively advanced technical force, and ensures that an application has certain advantages in technology; the method uses mature technology, and ensures security and reliability of the application; the application is convenient to extend and maintain, facilitating technological updating; the application makes full use of existing resources, and reduces unnecessary reinvestment as much as possible; and compiled codes must be rigorous and readable, explanation of the codes must be clear, and thus responsibility is provided for redevelopment of the application.
Owner:CHONGQING KAIZE TECH

Mobile terminal and method for searching address and locating a correspondent node in a wlan

A method for addressing and locating WLAN communication node is disclosed in the present invention. The GSM or CDMA, which is characterized in broad coverage, the steadiest performance, and the most mature technology, is employed to confirm the subscribers' IP address. One of the communication parties sends data call to another party through GSM or CDMA and transmits the preset information package including the IP address of the calling party, which is processed by the system, to the other party. Then both parties can accomplish the WLAN interconnection based upon the known IP address in the WLAN. The method can also be applied to all the end-to-end communication system for addressing. The present invention relates to the mobile terminal adopting said method. The method can confirm the address information of the WLAN communication node conveniently, and rapidly, thereby decreasing the cost of communication, eliminating or lowering the dependence on the server of Internet so as to make the subscribers communicate more flexibly and conveniently.
Owner:KONINKLIJKE PHILIPS ELECTRONICS NV

Method and device for measuring temperature and heat flow distribution on internal face of combustion chamber

The invention relates to a method and a device for measuring temperature and heat flow distribution on the internal face of a combustion chamber, and belongs to the field of temperature and heat flow measurement. The measurement device comprises the combustion chamber, a temperature sensor, a temperature sensor fixing device, a signal transmission line and a computer; the lateral surface of the combustion chamber is provided with a series of equidistant temperature measuring blind holes; the temperature sensor measures the temperatures of the bottoms of the blind holes so as to obtain a temperature output curve of each measure point; and then a certain value computational method is adopted to calculate the temperature and the heat flow distribution on the internal face of the combustion chamber. Due to adopting a proposal of measuring the temperatures of the blind holes, the method and the device solve the problems of high processing and mounting difficulties, inconvenient detachment and the like in the prior art; and the armored thermocouple temperature sensor with mature technology is adopted, so that the cost is low and the use is convenient. The method and the device can be used for measuring the temperature and the heat flow distribution on the internal face of a combustion device with an axial symmetry structure.
Owner:BEIHANG UNIV

Intelligent traffic system

The invention discloses an intelligent traffic system. The intelligent traffic system comprises a traffic flow statistics unit arranged at a road junction, a mobile client-side, a mobile terminal and a server of a centralized control center, wherein the statistics unit is in communication connection with the remote centralized control center and sends flow statistics data to the centralized control center; the mobile client-side used by a passenger and the mobile terminal used by a taxi driver are in wireless communication connection with the centralized control center, and the time that taxis in different positions takes to arrive at a place where the specific passenger is located is calculated by the server of the centralized control center according to the traffic flow density of the current road; a plurality of taxis are optimally selected according to the time, information is sent to the passenger client-side, one of the taxis is selected by the passenger per se, and taxi calling is finished. As the adopted technical scheme has the advantages of mature technology, firm and reliable structure and relatively lower cost, the intelligent traffic system is particularly suitable for wide-range popularization and use.
Owner:DALIAN LIAN DA SCI & TECH

Wireless micro-power network positioning system and locating method thereof

The present invention relates to the positioning technology, in particular to a radio micropower network positioning technique and a positioning method. The prior positioning systems have the defects of complex structure, large investment and high operation cost, moreover, under complex environmental conditions, such as cities, the prior positioning systems cannot satisfy a lot of actual application requirements, and in order to resolve the defects, the present invention discloses the radio micropower network positioning technique and the positioning method. The present invention utilizes the positions of network nodes as references to determine the position of a mobile target according to the universal relation among signal sources, receivers, emissive power and signal intensity and the specific relation depending on the environmental characteristics. The present invention has the advantages of simple structure, low cost and mature technology, and complex measuring and calculation and electronic maps are not needed in order to satisfy the actual positioning requirement. The system is not only a positioning network but also a communication network which can transmit position information and control information, the structure is simplified, use is convenient, and the operation cost is greatly reduced.
Owner:西安西谷微功率数据技术有限责任公司

Intraconnection communication method of distributed virtual machine monitoring apparatus

The invention provides an implementation method of a distributed virtual monitor communication technology. In the method, the existing reliable transmission protocol is utilized to realize reliable and efficient communication among virtual machine monitors (VMM), provide the necessary basis for resources integration, provide a single physical node for an upper customer operating system, and realize the management and use of multi-node resources by the customer operating system by mainly combining an expansion system equipment simulation part with a descriptor ring mechanism. The method comprises the following steps: step one: a preparation phase; step two: a connection establishment phase; step three: a data transmission process; and step four: a connection closing phase. The method is an innovation based on the existing mature technology, and has simple implementation and good use and development prospects.
Owner:HUAWEI TECH CO LTD

Human-like collagen gene, homodirection tandem gene with different repeat numbers, recombinant plasmid having tandem gene and preparation method

The present invention discloses a human-like collagen gene, a same direction serial gene thereof with different repeat numbers, a recombined plasmid containing the serial gene and a preparation method. The base sequence of the human-like collagen gene Gel of the present invention is shown as SEQ ID NO: 1 in a sequence list, and the serial gene with different repeat numbers and the recombined plasmid containing the serial gene with different repeat numbers are obtained by the external enzyme digestion and the joint of the gene. The present invention is a complete novel sequence, and the length is greatly less than natural human collagen gene, which realizes the operation simplification at the molecular level and is easier to realize the gene engineering bacteria fermentation production of the collagen. The human-like collagen gene Gel also contains the characteristic of the natural human collagen gene, and corresponding human-like collagen expressed by the human-like collagen gene Gel can be provided with the good characteristic of the natural human collagen gene. The preparation method is just the simple external enzyme digestion connection reaction and the prokaryotic transformation and sieving with mature technology, which realizes the series connection of the target gene with any repeat number.
Owner:JIANGSU JLAND BIOTECH CO LTD

Ejection air-supplying turbosupercharger

InactiveCN101245714AOperating condition maintenance and continuityGood effectInternal combustion piston enginesEngine componentsForming gasTurbocharger
The invention discloses a turbocharger which utilizes the outer source compressed air to apply complementary energies on a rotor of the turbocharger, so as to improve the pressurizing pressure and improve the lower working situation property and instant characteristics of a gas engine. The turbocharger is formed by combining three parts of a turbocharger with ordinary structure and two accessories - a gas ejector and a gas complementing chamber. The outer source high-pressure compressed air ejects partial low-pressure pressurizing air through the gas ejector to form gas complementing air to flow in the gas complementing chamber to be mixed with the exhaust gas of the gas engine, thus increasing the fuel gas flow flowing into a turbine and improving the power and pressurizing pressure of the turbine. Compared with the prior art, the turbocharger has the advantages of mature technology, simple structure, reliable and safe use, low cost, direction pressure control, large adjusting and controlling degree, fast response and good effect; besides, the turbocharger can ensure the working situation to operate continuously after being adjusted and controlled and can be used on the gas engines of vehicles, ships and engineering plants.
Owner:孙敏超 +1

Implementing method for distributed internal memory virtualization technology

The invention provides a realization method for distributed memory virtualization technology. The method mainly adopts the latest virtualization technology of combing hardware and software together, conducts virtualization and integration to the memory resource distributed in a multi-host combining with distributed shared storage algorithm, provides a shared single physical address space for an upper grade guest operation system, and realizes the management and the use of the guest operation system to the distributed memory. The invention carried out innovation on the basis of the current mature technology, is simple to implement, and has excellent use and development prospects.
Owner:HUAWEI TECH CO LTD

Disabilities auxiliary robot of vision guide brain and audio control

The invention discloses a robot for assisting the disabled controlled by visual signal, brain wave and voice. It includes three parts of machinery, information gathering and controller. It is characterized by: the information gathering part consists of EEG for collecting brain wave signals the CCD camera for collecting visual signals and the microphone for collecting voice signals; the controller part analyses the brain wave signals, visual signals and voice signals and executes appropriate operating. The invention utilizes the existing multifold mature technologies synthetically, regards the visual information as target guide messages and regards the brain waves and the voice as control messages. The invention could improve the ability of the disabled live independently through using the integrated biological information to controlling robot.
Owner:UNIV OF ELECTRONIC SCI & TECH OF CHINA

Mobile terminal-based site survey system and method thereof

A mobile terminal-based site survey system and a method thereof are applied to the field of real estate and land site surveys. The system comprises a dispatching center, a wireless network, a mobile terminal, a survey operation module, a network, a cloud survey data base and a survey processing module. The method comprises the following steps: sending a survey task to the mobile terminal through the wireless network by the dispatching center; after the mobile terminal receives the task, carrying out site survey operation; generating survey data after the completion of the survey, and uploading to the dispatching center; and checking, accepting and processing the survey data received through the dispatching center. According to the invention, based on the mature technology of a mobile Internet and the mobile terminal, the work efficiency of site survey operation is improved; compared with the prior art, the site survey data is ensured to be real and complete; and the survey efficiency is improved 3-7 times compared with that of a traditional survey manner, the paperless survey is realized, and the equipment is simple.
Owner:SHENZHEN FANGXUNTONG INFORMATION TECH CO LTD

Treatment method for slaughter wastewater

The invention discloses a treatment method for slaughter wastewater. The treatment method includes the steps of pretreatment, biochemical treatment, precipitation separation, oxidative decolorization, activated carbon adsorption, disinfection treatment and sludge concentration. Through adopting the advanced, practical, mature and reliable treatment technology, the inflow requirements for water large in water quality fluctuation and amount are met, and it is ensured that the treated wastewater can not be discharged until reaching standards. By the adoption of the reasonable technology and reasonable arrangement, the construction cost is lowered as far as possible, and on the premise of guaranteeing safe, economical and stable operation of a system, the good treatment effect is achieved with the minimum investment. Based on the rule of the advanced and mature technology and reliable quality, the relation between manual operation and automatic control is reasonably handled, an automation technology is adopted for the step where manual operation is inconvenient, and the labor cost is high, and therefore the operation management level of the system is increased.
Owner:济南兄弟环保科技有限公司

Ground and underground three-dimensional extraction system of coal seam gas

The invention relates to an extraction system of a coal seam gas, comprising a coal mine underground clustered directional drilling group, a vertical well, an underground main extraction pipeline, an underground subhorizontal directional drilling orifice connecting pipeline, an underground water discharge box, a well head and a well head coal seam gas extraction pipeline, wherein the vertical well is arranged in an area near a directional drilling final hole and within a range of a ground clustered directional drilling track projection area, penetrates through a rock stratum, a rock stratum, a coal seam roof and a target coal seam and extends into a coal seam floor; the well head of the vertical well is provided with a ground extraction pipeline of the coal seam gas; the underground water discharge box is arranged in a coal mine underground roadway and connected with the coal mine underground clustered directional drilling group through the underground subhorizontal directional drilling orifice connecting pipeline penetrating through the target coal seam; and the upper end of the underground water discharge box is connected with the underground main extraction pipeline of the coal seam gas through a pipeline to form the three-dimensional extraction system. The invention has mature technology, little construction risk and difficulty and lower cost.
Owner:XIAN RES INST OF CHINA COAL TECH& ENG GROUP CORP

Waste heat recovery IGCC (integrated gasification combined cycle) combined heat and power generation central heating system and method

ActiveCN104533551AImprove economyGuaranteed annual power generation hoursLighting and heating apparatusSteam useCooling towerMature technology
The invention discloses a waste heat recovery IGCC (integrated gasification combined cycle) combined heat and power generation central heating system and method. The system comprises an air separation unit, a gasification furnace, a gas cooler, a purification plant, a gas turbine, a waste heat boiler, an absorption heat pump and a heat exchanger, which are connected successively. An exhaust smoke outlet of the waste heat boiler is emptied or is connected with a smoke inlet of a smoke condensation heat exchanger; a steam outlet of the waste heat boiler is connected with an inlet of a steam turbine; an exhaust steam outlet of the steam turbine is connected with a steam inlet of a condenser; a circulating water outlet of the condenser is connected with a cooling tower; a low-pressure extracted steam outlet of the steam turbine is divided into three paths, two paths or one path of temperature drop, and heat supply network return water is conveyed to a heat supply network for use after being heated. The invention also provides a central heating method. Clean and efficient IGCC is combined with extracted steam heat supply of the steam turbine, the extracted steam of the steam turbine is used for driving the absorption heat pump, the exhaust steam waste heat of the steam turbine and the smoke waste heat are recycled, and the extracted steam heat of the steam turbine and the recycled waste heat are utilized for central heating. The recovery waste heat IGCC combined heat and power generation central heating system and method have the characteristics of cleanliness, high efficiency, mature technology, high recycled waste heat amount, and capability of recycling smoke condensate water.
Owner:HUANENG CLEAN ENERGY RES INST +1

Product family configurator based on single-layer variant material library and implementation method thereof

The invention relates to a product family configurator based on a single-layer variant material library and an implementation method thereof. The product family configurator is provided with a computer system, wherein a material management system is installed in the computer system and is characterized in that a material library and a product library are arranged in the material management system; a basic material attribute table and a material relation table are installed in the material library; and a BOM tree of products, a first layer of relation table of products, a BOM tree of product families and a first layer of relation table of product families are installed in the product library. The implementation method of the product family configurator comprises a construction method and an application method. The configurator can visually show logical relation among parts in products, is convenient for informatization management of products, reduces the workload of consistency maintenance of data information of parts, ensures the validity of data, fully utilizes available resources, reasonably utilizes mature technology and design data, effectively controls the design cost, shortens the design time, and reduces the design difficulty.
Owner:重庆迈特科技有限责任公司

Method for preparing vegetable protein small peptide by microoprganism fermentation

InactiveCN102719505AMature technologyProcess parameters are accurate and reliableMicroorganism based processesFermentationWheat glutelinMature technology
The invention provides a method for preparing vegetable protein small peptide by microoprganism fermentation. According to the invention, soybean meal, peanut cake, cottonseed cake, rapeseed cake, zein powder, wheat glutelin protein powder, soybean protein isolate, soybean powder and the like are taken as raw materials, one raw material is used or more than two raw materials are mixed, macro-molecule protein in the plant is decomposed by the microoprganism fermentation to form micromolecule bioactive peptides, then spray drying is carried out to prepare the powdery vegetable protein small peptide product. The highly finished product can be used for food, cosmetics and health products. The crude product can be used as a feed functional reinforcing additive, a microorganism culture medium of the fermentation industry, a vegetation promoter and the like. The invention has the advantages of mature technology, reliable and stable technological parameters and mild fermentation condition, the final product has stable quality, and has the obvious biological function characteristic.
Owner:梁金钟

High-power pulse tube refrigerator based on Stirling refrigerator

The invention discloses a high-power pulse tube refrigerator based on a Stirling refrigerator, which comprises a crank connecting link, a compression piston, an after-stage water cooler, a regenerator, a cold-end heat exchanger and a pulse tube system. A moving part, namely an expansion piston at a cold end of the prior (Phillips) Stirling refrigerator is substituted by the pulse tube system, andthe pulse tube system comprises a pulse tube, a hot-end heat exchanger, an inertance tube and an air reservoir. No moving part exists at a cold end of the high-power pulse tube refrigerator, thereby solving the problems such as machine wear and serious vibration caused by the expansion piston, remarkably improving the reliability of the refrigerator and widening the application range of the refrigerator. The high-power pulse tube refrigerator adopts the annular regenerator with mature technology, reduces the annular flow of gas in the regenerator, effectively solves the problems of nonuniformtemperature and flowing universally existing in the high-power pulse tube refrigerator, and increases the symmetry of radial temperature, thereby reducing the loss of the regenerator in the high-powerpulse tube refrigerator, and improving the efficiency of the refrigerator.
Owner:ZHEJIANG UNIV

Ga2O3-baesd metal oxide semiconductor field effect transistor with good heat dissipation performance and preparation method thereof

ActiveCN106920849ASolving Heterogeneous Epitaxy ProblemsOvercome the disadvantages of poor heat dissipation and high priceSemiconductor/solid-state device detailsSolid-state devicesInsulation layerMature technology
The invention discloses a Ga2O3-baesd metal oxide semiconductor field effect transistor with good heat dissipation performance and a preparation method thereof, and belongs to the technical field of power semiconductor devices and preparation thereof. The device is formed by parts of a substrate, a Ga2O3 buffering layer, a Ga2O3 channel layer, a Ga2O3 source, a drain region, an Al2O3 insulation layer and a metal electrode, and is characterized in that the substrate is Si monocrystalline; a nitride and oxide mixed multilayer structure is prepared between the substrate and the Ga2O3 buffering layer; and the mixed multilayer structure is formed by a GaN-serial multilayer structure film, a Ga2O3 oxidation thin layer, an involuntary doped Ga2O3 lower buffering layer and a magnesium doped Ga2O3 semi-insulation layer. According to the invention, a heteroepitaxy problem of Ga2O3 materials is solved; disadvantages of poor heat dissipation performance and high selling price of the Ga2O3 monocrystalline substrate used by the current Ga2O3-baesd metal oxide semiconductor field effect transistor are overcome; and advantages of mature technology, low selling price, easy integration and good heat dissipation of the Si material can be used, so the provided Ga2O3-baesd metal oxide semiconductor field effect transistor is quite highly practical.
Owner:上海镓旦电子信息有限公司
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