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34results about How to "Short length" patented technology

Encryption and decryption methods and encryption and decryption systems for webpage identification

The invention provides encryption and decryption methods and encryption and decryption systems for a webpage identification. The encryption method comprises the steps of acquiring target address information to be shared according to a webpage address sharing request, and obtaining a target webpage identification by parsing the target address information; performing salting treatment on the target webpage identification with a first fixed value, and then coding the identification to obtain a second character string; further performing salting treatment with a second fixed value and using a hash algorithm to generate a hash value, and cutting out n characters from the hash value as a fourth character string; and jointing the second character string with the fourth character string to obtain an encrypted webpage identification. The decryption method comprises the steps of disassembling the encrypted webpage identification according to a preset m value to obtain a fifth character string, and then decoding the fifth character string to obtain a seventh character string; and performing the inverse operation of salting treatment on the seven character string with a first preset value to obtain the webpage identification. According to the method of the invention, the encrypted webpage identification is short, prone to be shared to third-party applications, and also good in security.
Owner:NUBIA TECHNOLOGY CO LTD

Thermal power measuring device

The invention discloses a thermal power measuring device. The thermal power measuring device comprises a constant temperature system, a heat measurement system, a reaction system, a heat calibration system, a gas supply system and a data collecting and control system. The constant temperature system comprises a temperature controller and a constant temperature furnace connected with the temperature controller. A heat measuring cylinder is arranged in the constant temperature furnace. A soaking block is arranged in the heat measuring cylinder. A reaction tank cavity and a reference tank cavity are formed in the soaking block and are symmetrical about the axis of the soaking block. The reaction system comprises a reaction tank sample holder and a reference tank sample holder. The calibration system comprises a reaction tank calibration sample holder and a reference tank calibration sample holder. The reaction tank calibration sample holder and the reference tank calibration sample holder respectively comprise a tubular sample rod and a soaking body II arranged at one end of the tubular sample rod. A ceramic tube is arranged in each soaking body II. A thermal resistor is wound around the ceramic tube of the reaction tank calibration sample holder. The thermal resistor is connected with four leads. The gas supply system comprises a reference gas source and a reaction gas source. The reaction tank cavity and the reference tank cavity are distributed symmetrically in the radial direction, and the influence of axial temperature change of the constant temperature furnace on the measurement of thermal power is offset.
Owner:INST OF CHEM CHINESE ACAD OF SCI

Small high-density multi-core optical fiber connector

The invention relates to a small high-density multi-core optical fiber connector. A plurality of contact pin parts are arranged in a spline shell of a plug, contact pin pressing plates are arranged on the tail portions of the contact pin parts, springs are arranged between the contact pin parts and the contact pin pressing plates, a fastening nut is arranged at the tail of the spline shell, and the fastening nut tightly ejects the contact pin pressing plates through a rear ejector sleeve. A metal shell of a socket is installed in an outer shell, each cavity of the metal shell is provided with a ceramic bushing, contact pin pieces are arranged in the ceramic bushings, ceramic bushing pressing plates are installed on the tail portions of the ceramic bushings, and a tail nut tightly ejects the ceramic bushing pressing plates through a contact pin ejector plate. The optical fiber connector is small in size and high in integration level, and can be used in small space. A viscose structure is not arranged inside a shell of the optical fiber connector, so that the optical fiber connector is convenient to disassemble, the whole internal structure can be taken out only by disassembling the tail of the optical fiber connector in the maintenance process, if some parts are damaged, only the damaged parts need to be replaced, other parts cannot be scraped, and therefore maintenance cost is low.
Owner:CHINA AVIATION OPTICAL-ELECTRICAL TECH CO LTD

Furnace roller for tunnel type furnace kiln

The invention discloses a furnace roller for a tunnel type furnace kiln, in particular to a furnace roller on a roller bed used for conveying metal thin strips in the process of conducting continuous high temperature heat treatment on the metal thin strips in a tunnel type furnace kiln. The furnace roller comprises a shaft body and a roller shaft. The furnace roller is characterized in that the shaft body is a solid ceramic roller; the diameters of the segments of the two ends of the shaft body are each smaller than the diameter of the middle segment of the shaft body; the opposite side faces of the segment of each end of the shaft body are each a plane; and the two planes at the same end are parallel to each other. The two ends of the shaft body are each provided with a stainless steel shaft head; the stainless steel shaft heads and the shaft body are coaxial; a shaft sleeve is arranged at the inner end of each stainless steel shaft head; one end of each shaft sleeve is a closed end; and each closed end and the inner end of the corresponding shaft head are of an integral structure. The shape of an inner cavity of each shaft sleeve is the same as the shape of the segment of the corresponding end of the shaft body, and the segment of each end of the shaft body extends into the other end of the corresponding shaft sleeve in a close manner. The furnace roller is not prone to damage and low in maintenance cost. By means of the furnace roller, production cost can be reduced.
Owner:无锡华精新材股份有限公司

Large-view-field compact catadioptric telescope optical system with clamping type focus

The invention discloses a large-view-field compact catadioptric telescope optical system with a clamping type focus. The large-view-field compact catadioptric telescope optical system comprises a spherical aberration correction lens group, a spherical primary mirror with a hole in the center, a spherical secondary mirror, a view field aberration correction lens group and a focal plane at the position of the clamping type focus, wherein the spherical aberration correction lens group is located at the entrance pupil position of the system, the central area, close to the convex surface of the spherical primary mirror, of the spherical aberration correction lens group is plated with a reflecting film, the edge annular belt is plated with an antireflection film, the area is the position of the spherical secondary mirror, and the spherical aberration correction lens group and the spherical secondary mirror share one optical element; the field aberration correction lens group is positioned on the back surface of the spherical primary mirror and in front of the focal plane; the focal plane of the optical system is located at the clamping type focal point. The optical system has the characteristics of small size, fast focal ratio, large field of view, wide wave band and convenience in installation and maintenance of the terminal detector, and can greatly improve the observation capability and detection efficiency of the telescope.
Owner:NANJING INST OF ASTRONOMICAL OPTICS & TECH NAT ASTRONOMICAL OBSE

Automatic opening and closing multi-folding umbrella with short umbrella closing length

The utility model discloses an automatic opening and closing multi-folding umbrella with a short umbrella closing length. The umbrella comprises: a first umbrella rib (41), asecond umbrella rib (42) and athird umbrella rib (43) which are sequentially connected from inside to outside, asecondary rib (44) hinged to the middle of the first umbrella rib (41), a connecting rod (45) which has two ends connected with the secondary rib (44) and the second umbrella rib (42) respectively, and a pull rod (46) which has two ends connected with the first umbrella rib (41) and the third umbrella rib (43) respectively. The outer end part of the first umbrella rib (41) extend outwards along the connecting point of the first umbrella rib and the second umbrella rib, the pull rod (46) is located below the second umbrella rib (42), the connection point of the inner end of the pull rod (46) and the first umbrella rib (41) is located outside the connection point of the first umbrella rib (41) and the second umbrella rib (42), and the connection point of the outer end of the pull rod (46) and the third umbrella rib (43) is located outside the connection point of the second umbrella rib (42) and the third umbrella rib (43). After the multi-folding umbrella is unfolded, the size of the unfolded umbrella is large, the length of the folded umbrella is short, and the multi-folding umbrella is convenientto carry.
Owner:黄自力

Full-rotation detonation mode rocket-ramjet combined engine and operation method

The invention discloses a full-rotation detonation mode rocket-ramjet combined engine and an operation method. The full-rotation detonation mode rocket-ramjet combined engine comprises a shell, a center body, an oxidizing agent storage tank and a fuel storage tank. The shell comprises an arc-shaped amplification section, a short cylinder section, a long cylinder section and an arc-shaped contraction section; the center body comprises an air inlet cone, an injection panel and a rocket engine; the rocket engine comprises a common shell, a central cylindrical section and a central tail cone; a stamping rotating detonation combustion chamber is formed between the outer wall face of the public shell and the long cylinder section. And a rotary detonation rocket combustion chamber is formed between the inner wall surface of the common shell and the central cylindrical section. The device has a rotary detonation rocket mode and a rotary detonation stamping mode; the method comprises the following steps: firstly, working in a rotary detonation rocket mode to realize zero-speed starting boosting or horizontal launching; and when the flight speed reaches Ma2.5, a rotating detonation stamping mode is switched to, and oxygen in the air is utilized. Meanwhile, the fuel cavity can cool the public shell and preheat the fuel, and detonation combustion is achieved in a hot fuel mode.
Owner:PLA PEOPLES LIBERATION ARMY OF CHINA STRATEGIC SUPPORT FORCE AEROSPACE ENG UNIV

A thermal power measuring device

The invention discloses a thermal power measuring device. The thermal power measuring device comprises a constant temperature system, a heat measurement system, a reaction system, a heat calibration system, a gas supply system and a data collecting and control system. The constant temperature system comprises a temperature controller and a constant temperature furnace connected with the temperature controller. A heat measuring cylinder is arranged in the constant temperature furnace. A soaking block is arranged in the heat measuring cylinder. A reaction tank cavity and a reference tank cavity are formed in the soaking block and are symmetrical about the axis of the soaking block. The reaction system comprises a reaction tank sample holder and a reference tank sample holder. The calibration system comprises a reaction tank calibration sample holder and a reference tank calibration sample holder. The reaction tank calibration sample holder and the reference tank calibration sample holder respectively comprise a tubular sample rod and a soaking body II arranged at one end of the tubular sample rod. A ceramic tube is arranged in each soaking body II. A thermal resistor is wound around the ceramic tube of the reaction tank calibration sample holder. The thermal resistor is connected with four leads. The gas supply system comprises a reference gas source and a reaction gas source. The reaction tank cavity and the reference tank cavity are distributed symmetrically in the radial direction, and the influence of axial temperature change of the constant temperature furnace on the measurement of thermal power is offset.
Owner:INST OF CHEM CHINESE ACAD OF SCI

Three-section LED lamp flip-chip production process

The invention relates to a three-section LED lamp flip-chip production process. The production process comprises the following steps that three power wires are inserted into a driving plate through anoperator; the three power wires are fixed to the driving plate through wave soldering; the three power wires are a middle wire, an edge hole line and an edge line correspondingly; the driving plate is aligned and inserted with a clamping groove in a lamp cup; a three-section type lamp holder is pressed; the three-section type lamp holder is fixed; a middle through hole of the three-section type lamp holder and the middle wire on the driving plate are welded and fixed through a constant-temperature electric soldering iron; then a edge through hole of the three-section type lamp holder and theedge hole line on the driving plate are welded and fixed; and the lamp cup and the driving plate component which are welded are sent into a lamp holder riveting machine to be riveted. According to thethree-section LED lamp flip-chip production process, due to the fact that the flip-chip process is adopted, the driving plate is arranged in the lamp cup firstly, and then the three-section type lampholder is arranged, so that the three-section type lamp holder can be fixed through the lamp cup, the difficulty of the process of welding the lamp cap is reduced, and the whole production process can work on the assembly line, the working efficiency is greatly improved, and the production cost is reduced.
Owner:FUJIAN JOINLUCK ELECTRONICS ENTERPRISE

Heat source tower heat pump unit and simple switching method for refrigerating and heating dual functions of heat source tower heat pump unit

The invention discloses a heat source tower heat pump unit and a simple switching method of the refrigerating function and the heating function of the heat source tower heat pump unit, and belongs to the technical field of heat pumps. The heat pump unit comprises a first compressor, a first heat exchanger, a throttling element and a second heat exchanger which are sequentially communicated and used for refrigerant circulation. And the first compressor realizes reversing of a refrigerant through position and direction change. According to the heat pump unit, the defects of a water pipeline switching system adopted by a conventional heat pump unit are overcome, and meanwhile, the defects of pipeline switching in a conventional refrigerant system are also overcome; an anti-freezing solution is prevented from entering an indoor system, the indoor system is protected, the installation difficulty of a machine room is effectively reduced, and the installation space is reduced; the refrigerant pipeline is simple, short in length and small in channel resistance, the heat pump unit can operate with high energy efficiency, the pipeline does not need to adopt a four-way valve, and energy efficiency reduction caused by pressure drop of four-way valve switching is avoided.
Owner:江苏辛普森新能源有限公司
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