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95results about How to "Adapt to actual needs" patented technology

Electric marking system capable of automatically processing marking results and method thereof

The invention provides an electric marking system capable of automatically processing marking results and a method thereof. The electric marking system comprises a central processing unit, image acquisition equipment, control signal input equipment, display output equipment and a storage unit, wherein the central processing unit is connected with the image acquisition equipment, the control signalinput equipment and the display output equipment and is bi-directionally connected with the storage unit. The electric marking method comprises an electric marking reading-over method and an electricmarking optional reading-over method.
Owner:SHANGHAI XINYIDA ELECTRONICS TECH

Method for automatically controlling growth of 85-120kg sapphire crystals

The invention discloses a method for automatically controlling growth of 85-120kg sapphire crystals. The method comprises the step of sapphire crystal seeding and is characterized in that an electronic weighing device used for measuring the crystal weight is arranged in a single crystal furnace and sends a weight signal to a PLC (programmable logical controller) system; after sapphire crystal seeding is finished, the PLC judges the crystal growth stage in the growth process according to the crystal weight, calls out the process parameter packet of the corresponding stage and adjusts the parameters via PID (proportion integration differentiation); when the crystal net weight measured by the electronic weighing device exceeds 3-5kg, the PLC adjusts the temperature reduction amplitude and controls the sapphire crystals to grow in an isodiametric manner; when the crystal weight measured by the electronic weighing device exceeds 45-70kg, the PLC adjusts the temperature reduction amplitude and controls growth of the sapphire crystals to end; and when the reduction amplitude of the heater powder computed by the PLC exceeds 15-20%, the sapphire crystals are automatically transferred to the cooling and inflating stage and leave from the pot, thus completing growth.
Owner:NANJING CRYSTAL GROWTH & ENERGY EQUIP CO LTD

Household equipment control method and device and terminal

The invention provides a household equipment control method and device and a terminal. The method comprises that historical household operation data is obtained according to a received control mode start command; and according to the historical household operation data, the operation state of at least one of multiple household equipment connected to the terminal is controlled. According to the technical scheme of the invention, the household equipment can be intelligently controlled according to habits of a user, operation of the household equipment is simplified, the practicality of household equipment control is improved, practical requirements of the user can be met, and user experience is improved.
Owner:DONGGUAN COOLPAD SOFTWARE TECH

Method and system for acquiring historical interaction information after adding into discussion group

The invention provides a method and a system for acquiring historical interaction information after adding into a discussion group. The method comprises the following steps of establishing the discussion group by an initiator, and establishing an information recording data sheet of the discussion group by a server; numbering chatting information records of the initiator and common members in the discussion group by the server according to time in reaching the server, and storing the chatting information records in a chatting information recording sheet; inviting a to-be-added member to add into the chatting by the initiator, wherein in inviting the to-be-added member, the initiator can authorize the to-be-added member to acquire the historical chatting information records and can forbid the to-be-added member to access the historical chatting information records; in adding the group by the to-be-added member, marking a starting number of the information by the server, wherein the information can be read by the to-be-added member; wherein if the to-be-added member is authorized to acquire the historical chatting information, the number of the starting information which can be read by the to-be-added member is the first piece of information in all historical information records.
Owner:IVT TECH BEIJING

Contact type thin plate thickness manual measurer

The invention provides a contact type thin plate thickness manual measurer. The contact type thin plate thickness manual measurer comprises a base measuring platform, a measuring mechanism and a fixed workbench, wherein the base measuring platform comprises a beam, a support and a platform plane and is built through adoption of a fixed gantry structure; the beam is connected with the support; the support is fixed on the platform plane; the measuring mechanism comprises a slide bar and a contact type measuring head; the beam is sleeved with a slide bar on which a track is carved and the contact type measuring head capable of doing vertical up-and-down movement is mounted; the fixed workbench is detachably arranged below the contact type measuring head and on the platform plane; and the fixed workbench comprises a mounting pedestal, a right-angle locating rule, an absorption mesh pore plate and an absorption airflow trough plate. The contact type thin plate thickness manual measurer, disclosed by the invention, has the advantages of removing a complex shafting structure as a manual measuring way is adopted for measuring, simplifying complex degree of an equipment system to the maximum limit, lowering equipment hardware cost and extremely adapting to practical demands of industries to the thin plate thickness measuring equipment.
Owner:KUNSHAN YUNCO PRECISION IND TECH

Network user identity recognition method

The invention requests to protect an identity recognition method between a network identity and a real identity, comprising the following steps of: firstly, collecting real identity data of a specificobject in reality and specified network user data; then, formatting processing is performed on the acquired user identity data, and required information in the user identity data is extracted; Then,the relevance between the virtual identity and the real identity is mined and analyzed, and similarity analysis of basic identity information is carried out; then, virtual identity description information of the user is mined and analyzed through content information published on the network by the user, an association relationship between the virtual identity description information and the real identity description information is established in combination with a knowledge base, and correlation analysis of the identity description information is carried out; and finally, fusing the calculation results of the similarity of the basic identity information and the correlation of the identity description information, and inferring the relationship between the specified virtual identity and thereal identity. The public opinion supervision method is helpful for forensics investigation of specific user identities in cases, and public opinion supervision efficiency is improved.
Owner:CHONGQING UNIV OF POSTS & TELECOMM

Preparation method of 12-tetradecadienyl acetate of corn borer sex pheromone

The invention belongs to the field of corn borer sex pheromone, and discloses a preparation method of 12-tetradecadienyl acetate of the corn borer sex pheromone. Raw materials of the method are cheap and easily available. A stereochemical structure of a Grignard reagent which is used in the method enables that the stereoisomerism of a double bond is not encountered in reaction processes, product is single, operation is convenient and safe, raw material utilization ratio is high, synthetic route is simple and reasonable, and two main components of cis(trans)-12-tetradecadienyl acetate are synthesized. Cis-4-hexen-1-ol and 1,8-octanediol are taken as the initial raw materials of Z-12-tetradecadienyl acetate; the Grignard reagent is produced from 1,8-octanediol; cis-4-hexen-1-ol reacts with 4-toluene sulfonyl chloride and then the product and 8-magnesium bromide-1-octanol tetrahydropyran are subjected to Grignard coupling reaction; the product is subjected to deprotection and esterification; and then Z-12-tetradecadienyl acetate is obtained. E-12-tetradecadienyl acetate is obtained by subjecting crotonyl alcohol and 1, 10-decanediol to the reaction processes listed above. The 12-fourteen carbon enol acetate of the invention is used as sex pheromone for corn borer control.
Owner:INST OF MICROBIOLOGY HEILONGJIANG ACADEMY OF SCI

Fingerprint verification method, fingerprint verification device and terminal

The invention provides a fingerprint verification method, a fingerprint verification device and a terminal. The fingerprint verification method comprises the steps that at least two pieces of fingerprint information is received; similarity of each piece of fingerprint information in the at least two pieces of fingerprint information and the preset fingerprint information is determined; the fingerprint superposition comprehensive value of the at least two pieces of fingerprint information is calculated according to similarity of the preset weight of each piece of fingerprint information and the preset fingerprint information and the preset fingerprint superposition algorithm formula; whether the fingerprint superposition comprehensive value reaches the preset comprehensive value is judged; and passing of fingerprint verification is determined according to the judgment result. With application of the technical scheme, defects of existing fingerprint verification functions that the number of fingerprint acquisition is low, the discrimination method is simple and mistaken identification is liable to occur can be improved. Security of fingerprint verification can be enhanced by increasing the number of fingerprints, and then passing of verification is determined according to the comprehensive value of similarity. Besides, the condition that the fingerprints cannot be identified due to dirty marks on the fingers and other objective reasons can also be avoided so that the fingerprint verification method is suitable for the actual requirements of users further.
Owner:DONGGUAN COOLPAD SOFTWARE TECH

Incoming call processing method and incoming call processing device

The invention provides an incoming call processing method and an incoming call processing device. The incoming call processing method comprises the following steps: obtaining incoming call information; determining a contact grade corresponding to the incoming call information according to a contact of the incoming call information; and processing the incoming call information through an incoming call processing strategy corresponding to the contact grade. By adoption of the technical scheme of the invention, the terminal can automatically select the proper incoming call processing strategy according to the importance of the incoming call contact, thereby avoiding the inconvenience to the work and life of users resulting form that all incoming call information is reminded or all incoming call information is refused, accordingly the actual demands of the users are adapted, and the user experience is improved.
Owner:广东国利信息网络有限公司

Continuous production system of azo reactive dye using supergravity

ActiveCN109651843APerformance close to or the same asUniform heat conductionReactive dyesDecompositionCoupling reaction
The invention provides a continuous production system of azo reactive dye using supergravity. Firstly, a supergravity reactor is applied to a coupling reaction, which can greatly increase the reactionconversion rate and improve the quality of the product, and a spiral coil reactor is adopted for performing a diazotization reaction during the production. Compared with a current method that the diazotization reaction is performed by adopting a stirred tank reactor, the temperature rise of the system temperature can be accurately controlled, the diazotization reaction time is significantly shortened, the decomposition of diazonium salt is reduced to a large extent, and the industrial continuous production can be achieved.
Owner:BEIJING UNIV OF CHEM TECH

Drying system, air conditioner and work mode switch method

The invention provides a drying system, an air conditioner and a work mode switch method. The drying system comprises an outdoor heat exchanger, a first indoor heat exchanger, a second indoor heat exchanger, a compressor, a three-way electromagnetic valve and a controller. The three-way electromagnetic valve is provided with three ports at the first end, second end and third end, wherein the first end is connected to the compressor through a four-way valve, the second end is connected to the outdoor heat exchanger, and the third end is connected to the first indoor heat exchanger. The controller is connected to the three-way electromagnetic valve and used for switching the three ports according to a received mode adjustment instruction to adjust the work modes of the air conditioner, and the work modes include a pre-heating mode, a temperature-control mode and a drying and dehumidification mode. The technical scheme replaces the scheme in the correlation technique that air is pre-heated in an electric heating mode, so that energy consumption is reduced, automatic control over drying of a heat pump is realized, energy is saved greatly, and emission is reduced greatly.
Owner:GD MIDEA HEATING & VENTILATING EQUIP CO LTD +1

Financial service managing system based on service supporting system and establishing method thereof

InactiveCN104240126AImprove management service qualityRealization of regional personalizationFinanceSpecial data processing applicationsSupporting systemPersonalization
The invention discloses a financial service managing system based on a service supporting system. The financial service managing system comprises a source database generating module, a service layer generating module and a terminal function interface generating module. The source database generating module is used for acquiring data in a financial service managing database and generating sample database files, the service layer generating module has access to the sample database files through data interfaces and clusters access data to form different requirement rules, and the terminal function interface generating module can generate corresponding requirement rules of the financial service managing database according to the different requirement rules. The financial service managing system utilizes the traditional service supporting system to obtain regional individual requirement parameters required by the development of the financial service managing system and convert the regional individual requirement parameters into different rules. Data are extracted out from basic data areas to establish individual application data areas, the rural credit financial managing service quality is improved, and the regional individual scientific financial rural credit managing service can be achieved.
Owner:NINGBO HEJIA SOFTWARE TECH

Entrance guard system, terminal, cloud server and safety strategy setting method

InactiveCN105516060AImprove securityKeep abreast of the status after exiting the security policyIndividual entry/exit registersTransmissionComputer terminalSecurity level
The invention provides an entrance guard system, a terminal, a cloud server and a safety strategy setting method. The gate entrance system comprises a reception unit, a determining unit and a sending unit; when it is detected any terminal sends an entrance authentication request to the entrance guard system in a near-field communication manner, the reception unit receives the entrance authentication request; the determining unit determines the safety level of the terminal according to the entrance authentication request; and according to the safety level of the terminal, the sending unit sends a corresponding entrance authentication code to the terminal so that the terminal adopts corresponding safety strategy according to the entrance authentication code. According to the technical scheme of the invention, the safety of the entrance guard system is enhanced, communication between the terminal and the entrance guard system is improved to adapt to practical requirements of users, the convenience of users is improved, and the user can timely know the state of the terminal after withdrawing from the safety strategy.
Owner:YULONG COMPUTER TELECOMM SCI (SHENZHEN) CO LTD

Cargo allocation optimization method based on logistics total quantity and energy consumption

The invention discloses a cargo allocation optimization method based on total logistics amount and energy consumption, and the cargo allocation optimization method comprises the steps: obtaining the historical warehouse-in and warehouse-out frequency data of cargos, and carrying out the classification of the cargos according to the frequency; setting the loading, unloading and transportation workload in the cargo warehouse-in and warehouse-out process as the logistics quantity, distributing the cargos with large logistics quantity to the cargo spaces close to the warehouse-in and warehouse-outopening, setting the sum of the logistics quantities of all the cargos as the total logistics quantity, constructing a model by taking the minimum total logistics quantity as an optimization target,and distributing the cargo space number of each cargo; constructing a model by taking the minimum total energy consumed in the warehouse-in and warehouse-out process of all the cargos as an optimization target; and combining a greedy algorithm with a genetic algorithm to solve the model, and distributing the cargos to each row of specific goods grids. According to the cargo allocation optimizationmethod, the total logistics amount and energy consumption are comprehensively considered, and the number of cargos is distributed, and the cargos are distributed to each row of specific cargo grids,and the total logistics amount and energy consumption are reduced, and actual requirements are met.
Owner:WUHAN UNIV OF TECH

Continuous production method and system of heterogeneous system azo disperse dye

The invention provides a continuous production method and system of a heterogeneous system azo disperse dye, and the method comprises the following steps: grinding and pulping a coupling intermediateinsoluble in water or an acid aqueous solution, a dispersing agent, and the water or the acid aqueous solution to obtain a coupling pulping solution, continuously pumping the coupling pulping solutionand a diazonium salt solution into a supergravity machine for coupling reaction, enabling a reaction material to flow into a receiving kettle, forming a circulating system by the receiving kettle, aheat exchanger and the supergravity machine, controlling the liquid level or weight of the receiving kettle, continuously extracting the reaction material into a crystal transformation kettle, and carrying out heating crystal transformation, filter pressing and washing to obtain the azo disperse dye. According to the method, through combination of intermediate grinding, dispersant adding and supergravity machine enhanced reaction, sulfuric acid or hydrochloric acid needing to be added during pulping in a traditional process is reduced or even eliminated, the wastewater amount can be effectively reduced, the reaction efficiency is improved, and the method has obvious advantages in the aspects of reaction retention time, product purity and yield.
Owner:ZHEJIANG DIBANG CHEM +1

Electric sedan provided with light-touch auxiliary wheels

ActiveCN102490806AReduce areaReduce road resistance and energy consumptionSteering linkagesVehiclesVehicle frameElectric vehicle
The invention discloses an electric sedan provided with light-touch auxiliary wheels. The electric sedan comprises a sedan body with a casing and windshield, a sedan frame, two wheels, a steering wheel, seats, a battery pack, a drive controlling mechanism and a wheel steering mechanism, wherein the two wheels are arranged into a front wheel and a rear wheel; the seats are more than one and are arranged in longitudinal series connection; and auxiliary wheels which are lightly touched with the ground are arranged at the two sides of the sedan body. The electric sedan provided with light-touch auxiliary wheels provided by the invention is simple, light and safe in structure, low in energy consumption and low in cost, not only can be used for promoting the performance and applicability of electric vehicles, but also can well adapt to the actual requirements of vast consumers, and is beneficial to promoting the popularization and application of the electric vehicles.
Owner:朱元景

Embedded type universal material testing machine observe and control system

The invention relates to a measurement and control system of an embedded universal material tester, which comprises a main control board, a motor control board, a servo controller, a liquid crystal display, a keyboard, a force sensor and a grating encoder, wherein the motor control board is connected with a motor interface of the main control board through a 26-pin data line, and connected with the servo controller through a servo controller interface; the servo controller is connected with an AC servo motor through a control line, and connected with a serial port of the main control board through a serial port line. The invention has the advantages that CPLD(XC9572) is used for collecting displacement pulse signal which has the characteristics of high frequency, real-time phase judgment and large flexibility, therefore not only the counting accuracy is significantly improved, but also the operation load of the main processor is relieved according to specific application requirement.
Owner:EAST CHINA UNIV OF SCI & TECH

Production process of ferrous disulfide

The invention provides a production process of ferrous disulfide, and belongs to chemurgy. The following raw materials including sodium disulfide, ammonium disulfide, potassium disulfide, ferrous sulfate, ferrous ammonium sulfate and ferrous chloride are required in a synthesis process. The sodium disulfide, the ammonium disulfide, the potassium disulfide, the ferrous sulfate, the ferrous ammonium sulfate and the ferrous chloride are respectively dissolved into water at the normal temperature of 25 DEG C to be made into a saturated solution; the sodium disulfide, the ammonium disulfide and the potassium disulfide can be sequentially matched with the ferrous sulfate, the ferrous ammonium sulfate and the ferrous chloride, and can also be respectively combined and matched to obtain a ferrous disulfide suspension solution. Vacuum suction filtration, drying and drying are performed, and then, crushing is performed to obtain ferrous disulfide powder. The synthesized ferrous disulfide suspension solution and the ferrous disulfide powder have wide purposes on agriculture; good market prospects are realized; a promotion effect is achieved on promoting the agriculture modernization construction in China; certain economic benefits and social benefits can be achieved on agricultural means of production enterprises and the society.
Owner:刘长福

Aloft work platform

The invention relates to an aloft work platform erected on a high-rise building. The aloft work platform comprises supporting legs and a platform surface, wherein the supporting legs are used for supporting the platform surface; a static friction disc is arranged on the end part of each supporting leg; the aloft work platform further comprises lock catches for preventing the platform surface from turning outwards and a fixing rod for fixing the relative position of the supporting legs and the platform surface; each supporting leg and the platform surface form an included angle alpha which is less than or equal to 30 degrees. According to the invention, alpha angle self-locking design is adopted, so that the aloft work platform can be firmly clamped on a cantilever structure of a building. The angle alpha can be adjusted and the lock catches are retractable, so the aloft work platform can adapt to the actual requirements well.
Owner:HUAYU CONSTR GROUP

Heat acupuncture and moxibustion paste

The invention relates to a heat acupuncture and moxibustion paste which comprises a gelatinous layer. A stone needle coating is arranged at the bottom of the gelatinous layer, and the surface of the stone needle coating is further provided with a protective layer which is removed in use. The surface of the gelatinous layer opposite to the stone needle coating is further provided with a needle body, and a needle head of the needle body penetrates through the gelatinous layer and the stone needle coating. The heat acupuncture and moxibustion paste is equivalent to the structure integrating an existing stone needle therapy and an acupuncture and moxibustion therapy by adopting the gelatinous layer, the stone needle coating arranged at the bottom of the gelatinous layer and the needle body structure further arranged on the gelatinous layer. When the heat acupuncture and moxibustion paste is used, the stone needle coating is sufficiently pasted on the skin surface of a human body, the stone needle therapy can be conducted on the skin of the human body, and meanwhile the needle body needle head portion beyond the stone needle coating can further produce a stimulation effect on the acupuncture points of the human body. Compared with the singly performed stone needle therapy or acupuncture and moxibustion therapy, the therapy time is greatly saved, and the heat acupuncture and moxibustion paste is simple in structure, convenient to use and more remarkable in effect.
Owner:上海雅泰医疗器械有限公司

Intelligent inflatable cushion system based on human comfort level and application method thereof

The invention discloses an intelligent inflatable cushion system based on human comfort level and an application method thereof. The system comprises a biological characteristic identification module,an intelligent inflatable cushion module and a controlled equipment switch which are in communication connection with one another; and the biological characteristic identification module monitors theuser state in real time and sends the user state to the intelligent inflatable cushion module and the controlled equipment switch in real time, so that the inflation and deflation states of a controlled electric appliance and an inflatable cushion are adjusted in time, and intelligent control over the inflatable cushion according to the actual situation of a user is realized. According to the system in the invention, physical damage caused by improper sleeping postures can be avoided while the comfort level of people is ensured, and the waste of resources can be reduced.
Owner:CHENGDU TECHCAL UNIV

Fresh product management and sorting system

The invention relates to a fresh product management and sorting system. The system comprises an order collection module, a sorting task storage and management module, a commodity storage and management module, a judgment and comparison module and a sorting task allocation module, wherein the order collection module is used for collecting orders of all stores for summarization, generating sorting tasks and sending the sorting tasks to the sorting task storage and management module; the sorting task storage and management module is used for storing and managing all the sorting tasks and sendingthe sorting tasks to the judgment and comparison module; the commodity storage and management module is used for storing and managing commodity data information; the judgment and comparison module isused for comparing the sorting tasks with the commodity data information in the commodity storage and management module and judging whether goods are available for the sorting tasks; the sorting taskswith available goods are sent to the sorting task allocation module; the sorting tasks without goods are subjected to order stay processing, and comparison is performed again after corresponding goods arrive; and the sorting task allocation module is used for randomly allocating the sorting tasks with goods to handheld terminals of a plurality of sorting staff. Through the system, the labor intensity of the staff is effectively lowered, manual intervention is avoided, and labor cost is lowered.
Owner:湖北统讯智能科技有限公司

Integrated grid-connected detection system for energy storage power station and detection method of integrated grid-connected detection system

The invention relates to an integrated grid-connected detection system for an energy storage power station and a detection method of the integrated grid-connected detection system. The integrated grid-connected detection system for the energy storage power station comprises a data acquisition unit, function test units and a centralized control unit; the data acquisition unit is used for receivinganalog signals input by an energy storage system, then performing corresponding filtering processing, converting the analog signals into digital signals and then sending the digital signals to the centralized control unit and the function test units separately; and the centralized control unit is used for GPS time synchronization and is used for automatically loading or recognizing a manually input project parameter N corresponding to the function test units after receiving the digital signals sent by the data acquisition unit and automatically loading test parameters of the corresponding function test units and storing test results of the function test units. The integrated grid-connected detection system for the energy storage power station has the characteristics of high integration, convenient operation and high detection efficiency and has a high degree of automation. After a one-time wire connection is completed, detection programs of each detection item can be automatically loaded, and the situation that in the grid-connected detection process of the energy storage system, a tedious process of manually setting the detection programs exists after each detection item is detected is avoided.
Owner:STATE GRID HEBEI ELECTRIC POWER RES INST +2

Replicon DNA (deoxyribonucleic acid) vaccine vector, and construction method and application thereof

The invention discloses a replicon DNA (deoxyribonucleic acid) vaccine vector, and a construction method and application thereof in preparation of a replicon DNA vaccine. The replicon DNA vaccine vector having kanamycin resistance is obtained by replacing an ampicillin resistance gene in the replicon DNA vaccine vector pSCA1 with a kanamycin resistance gene, so that the replicon DNA vaccine prepared by using the vector can meet the physical clinical demands for ampicillin medicaments and improve the safety of clinical application.
Owner:INST OF BASIC MEDICAL SCI ACAD OF MILITARY MEDICAL SCI OF PLA

Text picture matching recommendation method based on deep learning

The invention discloses a text and picture recommendation matching algorithm based on deep learning. The adopted recommendation method is based on a continuously rich user operation record database. According to the method, a keyword feature vector is constructed by using picture recognition and a keyword extraction algorithm based on feature vector distribution, and optimal matching recommendation of a picture and a text is realized by combining a user operation record database, a similarity algorithm of the vector and a similarity algorithm of a set. Therefore, after an entering person enters the text and the picture data, the display positions of the homepage picture and the entered picture which are entered this time in the text can be automatically recommended. Therefore, the work oftext understanding, manual picture selection and picture position adjustment of an entering person can be eliminated.
Owner:XIAN UNIV OF TECH

Metal energy dissipation damper

The invention provides a metal energy dissipation damper comprising a connecting piece and a metal energy dissipation element. The connecting piece is fixedly connected with a building, the metal energy dissipation element is connected with the building by the connecting piece, and the energy dissipation element consists of a pair of T-shaped section steels after the middle portion is relatively bent in a welding connection. The medal energy dissipation element is divided into a straight-line segment and a circular segment, and the two ends of the circular segment are separately connected withthe building by the straight-line segment and the connecting piece. The straight-line segment of the metal energy dissipation element is provided with a plurality of first bolts, and the two ends ofthe pair of the T-shaped section steels are in a fixed connection by first bolts; the straight-line segment of the metal energy dissipation element is connected with the connecting piece by a second bot. The metal energy dissipation damper is explicit in energy dissipation mechanism, simple in structure, low in cost, flexible in using, strong in applicability. The seismic behavior of the buildingstructure is enhanced efficiently, the wind-induced dynamic response of the high-rise and super high-rise structure also can be reduced, meanwhile, the metal energy dissipation damper applies to the rapid construction of an assembled building structure, and marketing application prospects is good in generalization.
Owner:LANZHOU UNIVERSITY OF TECHNOLOGY

Preparation method for diphosphonic acid compound

The invention relates to a preparation method for a diphosphonic acid compound, and belongs to preparation methods for compounds. According to the method, a carboxylic acid compound used as a raw material is subjected to diphosphonic acid reaction in an environment-friendly commercially available low-price aliphatic hydrocarbon solvent in the presence of water by using a single phosphorus-containing reagent PCl3; and hydrolysis reaction is performed, and is combined with recrystallization operation. The method has the advantages that the diphosphonic acid compound is high in yield and purity; only the single phosphorus-containing reagent is used, and the diphosphonic acid reaction can be performed in the presence of water; reaction conditions are simple and mild; and the method is easy to operate and suitable for industrial production.
Owner:JILIN UNIV

Angle-adaptive pull rod and rotating plate system

The invention relates to the technical field of membrane structures, in particular to an angle-adaptive pull rod and rotating plate system. The angle-adaptive pull rod and rotating plate system comprises steel pipes, a rotating plate, rotating plate fixing pieces and pull rods; the bottom ends of the rotating plate fixing pieces are fixedly connected with the steel pipes, and the side faces of the rotating plate fixing pieces are provided with limiting holes; lug columns penetrating through the limiting holes are arranged on the two sides of the rotating plate, and gaps are formed between the lug columns and the limiting holes so as to enable the rotating plate to be rotatably assembled between the two rotating plate fixing pieces; and assembly holes are formed in the rotating plate, and the pull rods penetrate through the assembly holes to be fixedly connected with the rotating plate. The pull rods can be freely changed according to the actual angle, and thus the fixing angle of a membrane cloth is adjusted to meet the actual demand.
Owner:XIAMEN LINK STEEL STRUCTURE TECH
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