90results about How to "Lower specification requirements" patented technology

The invention belongs to the field of refrigerant, and provides a method for preparing fluorinated alkene by performing dehydrochlorination on chlorofluorocarbon under the action of a catalyst.According to the invention, the novel catalyst is prepared through an impregnation method, reaction of the catalyst and 2-chloro-l, 1, 2-tetrafluoro propane (HCFC-244bb) with lower purity is performed, and then high-temperature gas phase dehydrochlorination reaction is performed to prepare a fluorinated alkene product 2, 3, 3, 3-tetrafluoro propene. Through the adoption of the novel catalyst, the purity requirement on chlorofluoropropane is reduced, so that HCFC-244bb with the purity of 80 percent can be as a raw material, thereby effectively reducing the operating cost of the process; the halohydrocarbon conversion rate is high, and reach up to 60 percent, and the selectivity of the target fluorinated alkene is greater than 90 percent.

The object of the present invention is to reduce the load and specification requirements on the network and the video server. The buffer usage rate is counted and supplied to the tape driving controller 7. In the reproduction mode, the tape driving controller 7 decreases the running speed of a video tape when the buffer usage rate is larger than the proper value. And when the buffer usage rate is smaller than the proper value, the tape driving controller 7 increases the running speed of the video tape. Moreover, in the recording mode, the tape driving controller 7 stops the tape motion temporarily if the transmission speed of the network is slow and the buffer usage rate declines lower than the proper value. And if the buffer usage rate increases over the proper value, the tape driving controller 7 resumes the tape driving to record signals. Thus, the reproduction speed or the recording speed by the tape driving device 3 can be coincided with the transmission speed of the network.

The invention discloses a method for testing the network performance of network cards in network equipment. The method comprises the following steps: judging whether network ports of the network cardsarranged in the network equipment in a server system are physically connected or not; If so, calling a preset script to configure an IP address for each connected network port, and carrying out pairing division on each network port; Calling a pre-stored ping instruction to carry out a network connection test on the network ports which are paired with each other; And under the condition that network connection is tested, setting network ports which are paired as a client and a server respectively, and using a network performance test tool to carry out network performance test. According to themethod, the test cost and the specification requirement on the network equipment during network card pressure test can be relatively reduced, and the manual operation can be reduced to reduce the complexity of the operation. The invention further discloses a device for testing the network performance of the network card in the network equipment and a computer readable storage medium which have the above beneficial effects.

The invention discloses a profile steel-concrete composite beam hogging moment area structure based on a high-performance material. The structure comprises steel beams, and reinforced concrete cross beams, wherein the two adjacent butt joint positions of the end parts of the steel beams are connected by adopting connecting steel plates and bolts, and the butt joint positions are referred to as hogging moment areas; and the reinforced concrete cross beams are fixed outside the hogging moment areas in a wrapping mode, the structure further comprises high-performance concrete bridge deck slabs; the high-performance concrete bridge deck slabs are laid directly above the hogging moment areas, specially, the high-performance concrete bridge deck slabs are laid on the top surfaces of the steel beams located in the hogging moment areas and are laid on the top surfaces of the reinforced concrete cross beams located in the hogging moment areas, and the high-performance concrete bridge deck slabsensure that the hogging moment areas are completely covered. The structure has the advantages of reducing the bearing bending moment of a main beam span, reducing the requirements of the structure onthe profile steel specification, saving the material consumption, widening the span diameter range of a bridge, improving the structural rigidity and being good in integrity, high in overload capacity, high in safety and the like.

The invention discloses a full-automatic laser carving machine for straps. The full-automatic laser carving machine for the straps comprises a machine body, a carving head, an X shaft and a feeding mechanism. The feeding mechanism is arranged on the machine body and comprises a bottom plate, a guide plate, a driving feeding shaft, a driven feeding shaft and a driving portion, wherein the guide plate is perpendicularly arranged on the bottom plate which is connected with the machine body, the driving feeding shaft and the driven feeding shaft are abreast mounted at the front end of the guide plate vertically, and the driving portion is in transmission connection with the driving feeding shaft. The guide plate is provided with a feeding port, the back of the guide plate is provided with a plurality of conveniently-adjustable guide limiting positions at the feeding port, and a guide port is formed between each two guide limiting positions. The driving feeding shaft is provided with a limiting outlet in the feeding direction, a supporting bar for auxiliary supporting of materials is arranged at the front end of the limiting outlet, and the carving head is arranged above a gap position between the limiting outlet and the supporting bar. The full-automatic laser carving machine for the straps has the advantages of simplicity in operation, high in jumping speed and acceleration, improvement of machining precision, guarantee of product yield, reduction of consumption, improvement of production efficiency and saving of manpower and material resources.

The invention provides an arm joint for a truss arm. The arm joint comprises an arm joint body, top connection structures which are arranged on the top of the arm joint body, bottom connection structures arranged at the bottom of the arm joint body, and pull plates arranged on two sides of the arm joint body; the arm joint body has a truss structure and an extending axis; and the pull plates extend from the upper part to the lower part of the arm joint body, and the extending direction of the pull plate is almost parallel to that of the extending axis of the arm joint body. The invention also provides the truss arm and a crane with the truss arm. According to the arm joint for the truss arm, the truss arm and the crane with the truss arm, the truss arm can bear pressure and tension.

The invention discloses an atmospheric temperature difference power generation device, which mainly solves the problems of low efficiency and heat utilization rate, poor stability and the like of the conventional device. The device comprises a heat storage box (201) with a heat insulation layer (202), an external heat exchange fin (204), an internal heat exchange fin (206), and a semiconductor temperature difference power generation sheet (205) between the external heat exchange fin (204) and the internal heat exchange fin (206), wherein a liquid heat storage working medium (203) of which the temperature slowly changes along with fluctuation of air temperature is filled in the heat storage box (201); after long-term accumulation and counteracting of heat, the temperature of the liquid heat storage working medium (203) tends to be an average air temperature; and dynamic temperature difference between dynamic air temperature and average air temperature is formed inside and outside the heat storage box (201), is fed into the two ends of the semiconductor temperature difference power generation sheet (205) through the external heat exchange fin (204) and the internal heat exchange fin (206) and is further converted into voltage which is directly proportional to the dynamic temperature difference and output. The device has the characteristics of high efficiency and heat utilization rate and continuous electric energy output and can be used for providing power for low-power-consumption electronic equipment such as a distributed wireless sensor node for a long time.

The invention relates to a large-aperture static-state interference spectrum imaging instrument interferogram optical splicing method. When a detector spectrum dimension row number cannot satisfy the requirement of a system design for an interferogram sampling point number, a reflector surface can be arranged before an image plane for segmenting the image plane in a spectrum direction, and interferograms are respectively sampled and converted by use of N detectors (N>=2); and during instrument push-scan imaging, the interferogram images of multiple detectors are ordered and spliced among multiple frames of data, and an interference image satisfying a data processing requirement is obtained. The method provided by the invention solves the technical problem of incapability of the array specification of a detector in satisfying a high-spectrum resolution requirement.

A smart card-less check-in method for a hotel according to the invention comprises the following steps that S1, a portable intelligent terminal communicates with the server to obtain authorization parameters for opening the electronic door lock; S2, the portable intelligent terminal sends a wireless communication connection request containing the authorization parameters in a broadcast form; S3, the electronic door lock establishes a wireless communication connection with the portable smart terminal, the electronic door lock verifies the authorization parameters and opens the door lock, the electronic door lock sends a temporary power signal to the power switch, the power switch enters the temporary power supply status and starts a power-down countdown, and the power switch cuts off the power after the power-down countdown ends; and S4, before the power-down countdown ends, the guest closes the room door and turns the anti-lock button to lock the room door, the electronic door lock issues a hold power signal to the power switch, and the power switch enters a continuous power state after receiving the hold power signal. The invention can realize card-free check-in after a single connection, which reduces the performance and specification requirements for the portable intelligent terminal of the resident, and improves compatibility.

The invention relates to the technical field of uninterruptible power supplies and particularly to a charging control method for an uninterruptible power supply (UPS). The method, by decreasing the charging current of the UPS when input voltage decreases and increasing the charging current of the UPS when the input voltage increases, enables the voltage of the UPS being constant and not to exceed the rated operating voltage of the UPS when the voltage of the UPS is lower than the rated input voltage of the UPS, thereby reducing the specification requirements of wires, material volume, and product cost.

The invention discloses an instruction downloading method and device for an RISC-V processor based on a field programmable gate array FPGA development board, and the method comprises the steps: receiving a test instruction through an IO interface, and storing the test instruction in an instruction memory; Generating a switching instruction, and switching the instruction memory into a to-be-testedreduced instruction set calculation RISC-V processor for operation; Controlling the to-be-tested RISC-V processor to be reset, reading the test instruction in the instruction memory and operating thetest instruction. The method does not rely on the jtag interface and nand-flash but carries out instruction download through a common IO interface and an instruction memory, thereby improving universality of the test of the RISC-V processor. The invention further discloses an FPGA development board based on the method.

The invention provides a warehousing system used for truck unloading. The system comprises a warehouse, an underground stock bin, a dust removal device and a dust restraining baffle, wherein the underground stock bin, the dust removal device and the dust restraining baffle are arranged in the warehouse. The warehouse is provided with an entry and an exit, the underground stock bin receives materials, required to be unloaded, of a truck through an opening in the top of the underground stock bin, the dust removal device comprises a dust remover and a bin interior dust collection cover which is connected with the dust remover and arranged in the underground stock bin, the dust restraining baffle is arranged in the top opening of the underground stock bin and is connected with a reserved sidebin wall of the underground stock bin, the reserved side bin wall is the side bin wall which is arranged on the underground stock bin and allows the truck to run along the reserved path the earliest,the dust restraining baffle allows the truck to run through above the baffle and then carries out unloading on the interior of the underground stock bin, in the truck unloading process, generated raised dust can be restrained, and the raised dust can be collected conveniently through a dust collecting cover in the bin. The system can be widely suitable for various materials, good dust removal effect is ensured, and meanwhile the dust removal cost is reduced.

The invention relates to a special-shaped multi-cabin multi-functional environmentally friendly safe storage tank, comprising a storage tank main body, wherein the storage tank main body comprises a storage-transport container of an integrated structure, the storage-transport container is internally provided with an interlayer which can divide space in the container into multiple liquid storage cabins, the lower part of the storage tank main body is a bilayer side wall, a sandwich layer which is used for holding process pipelines is arranged in the middle of the bilayer side wall, the front end and the rear end of the storage-transport container are seal heads, and each seal head is sunk inwards and the periphery of the seal head is circularly welded. The bottom of the storage-transport container is provided with a plurality of environmental protection recycling cabins, a volatile gas inlet at the top of each environmental protection recycling cabin is connected with a volatile gas outlet at the top of each liquid storage cabin by virtue of a volatile gas guide pipeline, the volatile gas guide pipeline vertically penetrates through the liquid storage cabins, and each environmentalprotection recycling cabin is filled with condensation material and/or adsorbing material. The special-shaped multi-cabin multi-functional environmentally friendly safe storage tank provided by the invention can be widely applied to storing, loading and unloading, filling and blending of various petrochemical liquids/gases and has the characteristics of space saving, good structural rigidity, no overflow, no leakage, environmental protection, flame retardance, explosion suppression and the like.

The invention belongs to the technical field of green building materials, and discloses a bamboo rib solid wood combined hollow column and a manufacturing method thereof. The manufacturing method comprises the following steps that bamboo ribs are processed into bamboo rib materials, solid wood blocks with different lengths are placed in a double-layer hollow mold, and the solid wood blocks are glued into a solid wood hollow cylinder by using a cementing material; the surface of the solid wood hollow cylinder blank is polished; and then the bamboo rib materials are wound by grinding the solid wood hollow cylinder, and a series of the bamboo rib solid wood combined hollow column with different specifications are formed by using the cementing material. According to the bamboo rib solid wood combined hollow column and the manufacturing method thereof, the method conforms to the development direction of the national industry, and is green in building materials, the hollow in the column is good in sound insulation and heat insulation effects so that energy can be effectively saved, the energy use mode is optimized, and the environment protection is improved; and the excessive dependenceof people on the chemical petroleum materials is effectively reduced, the emission of products is reduced, so that the living environment of the people can be improved, the good development of the regional economy can be promoted, and good social and economic benefits can be brought.

The invention discloses a vehicle direct current carrier frequency single-line coaxial transmission method. The method includes following steps: (1) a single-line coaxial line is provided; (2) a coding module at a sending terminal is provided, the coding module at the sending terminal is used for coding 8bit/12bit YUV video data output by an image sensor into a signal format capable of being carried at a receiving terminal and transmitted and output on DC direct current signals and transmitting the data to the single-line coaxial line; and (3) a coding module at the receiving terminal and a decoding module at the receiving terminal are provided, the single-line coaxial line transmits the data transmitted by the coding module at the sending terminal to the decoding module at the receiving terminal, the coding module at the receiving terminal is used for transmitting direct current power supply signals to the sending terminal through the single-line coaxial line, the sending terminal obtains a direct current power supply and triggers the image sensor and a coding chip to start working, and the coding module converts video signals to the format capable of being transmitted and carried on the direct current signals and sends the signals to the decoding module at the receiving terminal for decoding.

The invention provides a rapid construction method for a steel truss and steel box combined girder bridge in an offshore height-limited and navigation-limited area. The method mainly comprises the following steps that auxiliary piers are respectively constructed at two sides of a main navigation channel, wherein the auxiliary piers comprise a main pier, a transition pier and a temporary pier between the main pier and the transition pier, a steel beam connecting and guiding buffering device and steel beam three-way displacement adjusting equipment are installed on the tops of the auxiliary piers; and then side span construction, middle span construction, side span steel beam cantilever flange construction, closure and steel beam positioning are carried out. A non-total-section large-section installation method is adopted for the steel beam side span, a full-section large-section installation method is adopted for the steel beam middle span, the hoisting capacity of hoisting equipment can be fully utilized, and the specification of the hoisting equipment is reduced; the requirements of navigation and aviation height limitation can be met; the offshore operation amount can be reduced, and the environmental protection, safety and quality risks of offshore operation are reduced; rapid construction can be achieved, and the construction period is shortened.

The invention relates to the technical field of compiler design, and discloses a risc-v-oriented compiler design implementation method, which comprises the steps of designing and constructing a PE calculation unit which comprises a floating-point number quantization unit, a product accumulation unit and a register; constructing a two-dimensional systolic array based on a PE calculation unit; expanding the constructed two-dimensional systolic array, and taking the expanded two-dimensional systolic array as a compiling calculation module of a compiler; and the compiler receives original data and a compiling operation instruction, and performs calculation and storage of the data by utilizing a compiling calculation module. According to the method, design and construction of the compiler are achieved based on the risc-v instruction set, the designed compiler can achieve parameter calculation of the neural network based on the multiple PE calculation units, the designed compiler quantifies the calculation result in real time, the compiling calculation speed is increased, and the calculation efficiency is improved. And the compilation calculation module based on the double-cache mechanism can improve the throughput of the calculation equipment and reduce the idle time of the PE calculation unit.

The invention belongs to the technical field of novel materials and applications thereof, and relates to a preparation method and an application of a porous carbon-coated cobalt core-shell structure magnetic material. The method comprises the following steps: coating the surface of magnetic cobalt with SiO2 by utilizing hydrolysis of tetraethoxysilane to obtain Co@SiO2; carrying out surface hydrophobicity and double bond modification by using oleic acid to obtain Co@SiO2@oleic acid; carrying out emulsion polymerization to achieve the polymerization of styrene on the surface of the magnetic core sphere to obtain a polymer microsphere with a magnetic core-shell structure; and carbonizing the polymer microsphere with the magnetic core-shell structure. The magnetic material with the core-shellstructure has a loose and porous surface, the mechanical strength and the chemical stability are further enhanced after carbonization, the carbonized magnetic material can be directly used for extracting and adsorbing endocrine disruptors, and the extraction recovery rate can reach 89.63-94.81%; and the magnetic material with the core-shell structure is combined with an HPLC technology to realizethe trace detection of endocrine disruptors, particularly bisphenol A.