71results about How to "Improve design requirements" patented technology

The invention provides a five-shaft milling method for a complex curved surface. The method selects a hard uncoated milling-cutter with 0.2-0.8 [mu]m ultrafine or microfine particulars, wherein the milling-cutter uses a conical or tapered-conical structure with a cutter teeth Z of 3-5 blades, a helix angle beta of the blades is more than or equal to 45 DEG, a length to diameter ratio of the cutter D/L is less than or equal to 15, climb milling is used, cutting action of the cutter pulls the cutter to cut, a cutting-in point and a cutting out point of a cutter path are arranged outside the curved surface, the cutter path is along an arc tangent direction when workpieces are cut in or cut out, directions of the cutter path are changed outside the curved surface, a distance of the cutter path away from the curved surface is not less than 1 to 4 times of a tool diameter D; during processing, a tool feed amount Fz is less than or equal to 0.11-0.5 mm, a cutting speed V is 17-260 m/min; during a rough machining and a fine finishining, different cutting depths are selected, the fine finishining need a reserved amount of 2-0.7 mm; and oil gas spray of compressed air is used to cool and lubricate.

The invention relates to a method for light weight of a 3D printing personalized external fixed supporting tool based on topology optimization. The method comprises the following steps of: step 1, scanning the limbs of an object to obtain data. Step 2, carrying out image segmentation and three-dimensional construction of the model to obtain a three-dimensional shell-like model of the surface of the limbs. Steps 3, carrying out surface modification treatment to construct a curved surface sheet of the outer contour of the limbs, and being imported to the computer-aided design software and beingtransformed to a shell-shaped curved surface model. Step 4, obtaining the initial finite element analysis result by using a finite element analysis software. Step 5, an iterative operation is designedon the basis of the optimization design of the sensitive algorithm. And finally, performing 3D printing to obtain the personalized external fixed supporting branch. The method combines the 3D printing technology to realize the optimized design and manufacture of the personalized external fixed supporting tool, not only can guarantee the effect of external fixation treatment of the supporting tool, meanwhile, the light weight design obviously improves the wearing comfort of the supporting tool, and can effectively reduce the medical cost.

The invention relates to the fields of biotechnologies and medicines, particularly discloses a detection primer for EML4-ALK (anaplastic lymphoma kinase) fused gene mutation, a probe and a detection kit, and aims to detect the EML4-ALK fused gene mutation. The detection primer comprises sequences as shown in SEQ ID NO: 1 to SEQ ID NO: 14. The sequence of the probe is as shown in SEQ ID NO: 15, of which the end 5' is modified with FAM or VIC (vasoactive intestinal contractor), and the end 3' is modified with NFQ-MGB (non-fluorescent quencher-myohemoglobin). The kit comprises the detection primer, the probe and a quality control system. The detection primer can specifically identify 13 EML4-ALK fusion mutation types, is high in sensitivity and can detect 5-copied mutations; the whole reverse transcription PCR (polymerase chain reaction) and fluorescence PCR detection process can be completed only by 80 minutes.

The invention discloses an external star wheel type overrunning clutch, and belongs to the technical field of clutch manufacture. The external star wheel type overrunning clutch is provided with an external star wheel (1), an embedded block (2), a pin roller (3), a permanent magnet (4) and an inner ring (5), wherein one side of the external star wheel is provided with a groove for accommodating the permanent magnet, a start wheel working face of the external star wheel is provided with a dovetail groove-shaped embedded alloy (2) (embedded block for short), and the working face is a logarithmichelical curved surface. The clutch has the advantages of simple manufacturing process, high working reliability, large bearing torque and long service life, can bear large torque force and impact force, and can work for long time under high-speed heavy load.

The invention discloses a method for configuring a bus bar of an aluminum electrolytic bath. The current in the electrolytic bath flows out from a power-in bus bar through a negative soft bus bar (1) to a zigzag bottom bus bar (3), a bottom through bus bar (4) and a side bus bar (5) respectively though a power-in negative bus bar, then enters a side bus bar through the zigzag bottom bus bar (3) and finally enters 4 pillar bus bars (7) of a downstream bath through the bottom through bus bar (4) and the side bus bar (5) respectively; and the current also flows out from a power-out bus bar through the negative soft bus bar (1) to the 4 pillar bus bars (7) of the downstream bath through a power-out negative bus bar (6). In the method, in an overall consideration of technology and economy and based on the configuration form of negative and positive pole numbers of the whole bath and the power-in way, a scheme for the magnetic field compensation of large aluminum electrolytic baths is more rationally designed to achieve a good magnetic field compensation effect and save the using amount of the bus bar around the baths so as to overcome the adverse factors in the conventional electrolytic baths.

The invention discloses a concrete self-curing agent and a preparation method and a using method thereof. The concrete self-curing agent is prepared from the following raw materials in parts by mass:50-70 parts of an evaporation inhibitor, 20-45 parts of a microporous plugging agent and 5-10 parts of a water-locking agent, wherein the evaporation inhibitor is one or a mixture of several of ethylene glycol, propylene glycol, 1, 2-butanediol and other raw materials; the microporous plugging agent is one or a mixture of several of n-octyltriethoxysilane, a silane/siloxane mixture, namely a DowCorning Z-6689 water-proofing agent, and other raw materials; the water-locking agent is one or a mixture of several of hydroxymethyl cellulose, hydroxypropyl cellulose and other raw materials. The invention further provides the preparation method and the using method of the concrete self-curing agent. The concrete self-curing agent is good in performance, can reduce moisture evaporation of concreteto maintain the internal humidity of the concrete, does not need other additional curing ways, improves the strength of the concrete, and enhances design requirements and quality requirements of theconcrete.

The invention discloses a DSP based power quality testing system. The system comprises a voltage transformer, a current transformer, a signal conditioning circuit and a DSP minimum system which are connected to a power grid, wherein the voltage transformer and the current transformer are connected with the signal conditioning circuit, an A/D sampling circuit and a frequency capturing circuit are connected between the signal conditioning circuit and the DSP minimum system, the DSP minimum system is connected to a CPLD (complex programmable logic device) internal logic circuit, the CPLD internal logic circuit is connected to an LCD (liquid crystal display), a real-time clock, a GPRS module and an RS232/485 interface. The DSP based power quality testing system is more reasonable in hardware structure design and only uses a single CPU, and most of logic circuits at the periphery are realized inside a CPLD, thereby greatly reducing the hardware structure of the system. In addition, software design and development are enabled to be simplified by adopting the hardware structure of the system.

The invention discloses an electroluminescent display backboard, a preparation method thereof, and a display device. The preparation method of the electroluminescent display backboard includes the steps: printing ink in a display area of a substrate, wherein the ink includes a luminescent layer material, and a solvent which can dissolve the luminescent layer material; and printing the solvent in the areas outside the display area. Therefore, the preparation method of the electroluminescent display backboard can simply obtain an electroluminescent display backboard. The prepared electroluminescent display backboard can satisfy the dry atmosphere consistency of the display area and the peripheral areas during the ink-jet printing film forming process, can improve the film thickness uniformity of the display area, and can be conductive to the design demand of large size and narrow frame at the same time.

The invention discloses a 5-point generatrix configuration method of a large-area inequipotential electricity type. It is composed of the cathode soft generatrix, cathode generatrix, bottom generatrix, side generatrix, lower column generatrix and electrobath. The lower column generatrix is 5-piece configuration. The invention not only can make the current passing every column appropriate and effectively reduce the magnetic field in the slot and the transverse magnetic field, but also match with every slot paramete of the large-scale slot. Especially compared with the two columns, the center columune has low current and is benefit to reduce the danger caused by the middle level magnetic field in the electrobath to make the electrobath more stable.

The invention discloses a quick and batch test method for the copy number of multi-copy genes of genomes by virtue of a PCR (polymerase chain reaction) technology. The method comprises the following steps of: respectively carrying out PCR amplification and product purification on some multi-copy genes and some known single-copy gene on a same tissue DNA (deoxyribonucleic acid) sample to test the mass concentration of each gene PCR purified product, converting the mass concentration into molar concentration according to the nucleotide sequence of the product, and preparing the standard curves of the genes by same RT-PCR (reverse transcription-polymerase chain reaction) by taking the PCR product and the tissue DNA sample which are subjected to gradient dilution as a template, thus obtaining the concentration of each gene in the DNA sample. Under the same extraction efficiency, the copy number of the multi-copy genes is the number obtained by dividing the quantity of the multi-copy genes under the same volume by the quantity of the single-copy gene, so that the copy number of seven different multi-copy genes in same biont can be tested by once 96-pore RT-PCR reaction, and the copy number of eleven different multi-copy genes can be tested by once 384-pore RT-PCR reaction. Therefore, the quick and batch test efficiency can be realized.

The invention discloses a system and a method for transcritical carbon dioxide power generation through the utilization of a gas-liquid separator and an ejector. The system comprises the gas-liquid separator, a compression pump, a compressor, a regenerator, a heater, a turbine, the ejector, a cooler and the expansion machine, wherein the compression pump is used for pressurizing and outputting a liquid-phase working medium; the compressor is used for pressurizing and outputting a gas-phase working medium; the regenerator is used for back-heating the working medium pressurized and outputted by the compression pump by utilizing the heat of a working medium outputted by the turbine; the heater is used for heating the working medium outputted from a cold flow outlet of the regenerator to a preset temperature; the turbine is used for driving a power generator to generate electricity; the ejector is used for pressurizing the working medium outputted from a heat flow outlet of the regenerator by utilizing the working medium pressurized and outputted by the compressor; the cooler is used for cooling a fluid of the working medium pressurized and outputted by the ejector; and the expansion machine is used for doing work by utilizing the expansion of the working medium outputted from a heat flow outlet of the cooler. According to the system for transcritical carbon dioxide power generation, the condensation cost of the system can be reduced; and meanwhile, the circulation efficiency of the system can be improved.

The invention relates to a cutting speed reducer for a coal mine development machine, comprising a case, an input shaft and a planetary deceleration assembly connected with the input shaft. The cutting speed reducer is characterized in that the case of the cutting speed reducer is a cylinder respectively provided with an input end flange and an output end flange at both ends and a partition board. The invention simplifies the case structure that can be in cast form, thereby improving the integrated intensity of the case, avoiding the problem of weld stress convergence existing in a welded structure, realizing optimum transmission load balancing, improving the transmission efficiency and guaranteeing processing and installation accuracy; therefore, the internal structure of the whole speed reducer is simple, practical and compact. A needle bearing is selected and used on a low speed level planetary wheel, thereby being capable of meeting the requirement for structure configuration and the requirements for work load and service life, being capable of greatly reducing the volume of spare parts inside the speed reducer and the case, and being conducive to the design requirement that the speed reducer must be installed and connected inside the main body. Therefore, the cost of the whole speed reducer is greatly reduced, and the speed reducer is more suitable for matching transmission of low-power development machines.

The invention relates to a multi-index parallel-detection protein chip detection kit based on a nitrocellulose membrane and a near-infrared fluorescent molecular marker. The multi-index parallel-detection protein chip detection kit comprises a micro-array protein chip, wherein the micro-array protein chip is formed by adopting the nitrocellulose membrane as a solid substrate and fixing different first proteins in different areas on the solid substrate; each first protein can be specifically combined with a disease marker in the body to form an immune complex, a second protein which can be specifically combined with the immune complex is marked by utilizing the near-infrared fluorescein molecules, and the second protein and the immune complex form a marker immune complex. An infrared fluorescent signal is a static signal and is not time-varied, and the signal and target protein concentration are in a proportional relation, so that the infrared fluorescent signal can be used for precise quantization; moreover, simplicity in operation is achieved, and the automation of the system can be realized. The invention also discloses a preparation method and a detection method of the protein chip detection kit.

The invention relates to a comprehensive experiment platform of wind power generation. The comprehensive experiment platform comprises a wind power generation device, an anemobiagraph, an electric energy output module, a data collecting processing module and a load. The wind power generation device is respectively connected with the electric energy output module and the data collecting processing module, the data collecting processing module is respectively connected with the anemobiagraph and the electric energy output module, and the electric energy output module is connected with the load. The wind power generation device outputs electric energy to the load through the electric energy output module, and simultaneously the data collecting processing module respectively collects, processes, stores and displays information of the wind power generation device, the anemobiagraph and the electric energy output module. Compared with the prior art, the comprehensive experiment platform of the wind power generation has the advantages of being capable of exercising thinking ability and an energy conservation conscious of students, training the ability of the students for analyzing and solving problems by using basic theory comprehensively, widening a view field of the students, and training the ability of the students for solving engineering problems independently and the like.

The invention discloses a universal verification platform and method for development of network core chip technology, and relates to the field of the network core chip technology. The platform comprises a power module, a CPU module, an FPGA module, a clock module, a PLL module, a DDS module, a cross module, an FPGA module, a backboard signal connector, an optical module and a RJ45 connector; the CPU module is connected with the FPGA module through the clock module, the PLL module, the DDS module and the cross module respectively; the FPGA module is connected with the RJ45 connector; and the cross module is respectively connected with the backboard signal connector and the optical module. The optical module comprises an SFP optical module connector and an XFP optical module connector; the backboard signal connector comprises a compatible high speed connector and a compatible low speed connector; and the RJ45 connector comprises two RJ45 interfaces. The universal verification platform disclosed by the invention can be used for verifying a variety of chips, so that the use cost is lower, and the resource utilization is quite reasonable.

The invention discloses a design system for a reinforced concrete beam based on a building information model (BIM). The system comprises an extraction module, a structure analysis module, a calculation module and an optimization module, wherein the extraction module is used for extracting BIM information needed for rebar design from the BIM, and the BIM information comprises load information, terminal support information and geometric information of the reinforced concrete beam; the structure analysis module is used for calculating a bending moment and shear force exerted on the reinforced concrete beam according to the BIM information; the calculation module is used for converting the geometric information, the bending moment and the shear force into rebar design requirements needed for reinforced concrete beam design according to design specification requirements; and the optimization module is used for optimizing the rebar design requirements by use of a hybrid genetic algorithm according to the design specification requirements. Rebar selection and arrangement provided through the system meet both the design specification requirements and the rapidity, economy and full-automation requirements in the realization process.

The invention provides a concrete pouring method for a tubular turbine unit runner of navigation-power junction engineering. The method comprises steps as follows: prefabrication of form baffles; mounting of the form baffles; pouring of concrete at the horizontal section of the runner and dismounting of the form baffles; setting of construction joints of the runner; pouring of foundation concreteof side wall structure sections of the runner; prefabrication of curved forms; mounting of the curved forms; pouring of curved concrete of the runner; dismounting of forms at the lower part of the runner and a secondary plastering process. The contact area of two sections of concrete construction joints is increased through the construction joints formed by the form baffles, the problem that bottom concrete is difficult to pour compactly due to curved steel bars is solved, and concrete can be poured compactly; the problems that curved surfaces and horizontal planes cannot be contacted and vibrated uniformly through conventional pouring due to the fact that the included angle at the junction of the arc section and the horizontal section of the runner is smaller are solved through dismounting of forms at the lower part of the runner and the secondary plastering process, so that the surface flatness, plastering quality and linear control of the runner meet the design requirement.

The invention discloses a cast aluminium rotor punching. The rotor punching comprises a body, wherein a rotating shaft hole is formed in the center of the body; a key slot is arranged on the rotating shaft hole; 84 slots are arranged on the radial surface, which is close to the periphery, of the body and adopt closed slot structure; and the distance between outer slots of the slots and a periphery of the body is 1.0-1.2mm. The rotor punching has the following beneficial effects: the slots of the rotor punching are of the closed slot structure; when aluminium is cast on the rotor, the closed part is considered as the middle mould of the cast aluminium mould to prevent molten aluminium from overflowing, various iron cores with required length are convenient to process, and the rotor has simple structure and is easy to realize; and the middle mould of the cast aluminium mould is omitted and the production cost and period and the management cost are reduced.

The invention discloses a thin-wall high-position-precision hole system component machining method. Through cutting tool selection and clamping, equipment pre-running, a machining reference, machine tool precision checking, cutting amount distribution, cutting force control, component clamping and other multi-aspect technical adjustment, combination and optimization, guaranteeing of high-position-precision machining elements of components and process upgrading are achieved, and effective control over the high-position precision of the components is achieved.

The invention discloses a voice terminal system based on a single-chip microcomputer, and the system comprises a microcontroller, an LCD module interface module, a voice high-speed decoding circuit, a key interface circuit, a word stock storage circuit, an asynchronous high-speed serial port chip, a data buffering region, a power management circuit, and a TTL level and RS422 level conversion module connected with the asynchronous high-speed serial port chip, wherein the LCD module interface module, the voice high-speed decoding circuit, the key interface circuit, the word stock storage circuit, the asynchronous high-speed serial port chip, the data buffering region and the power management circuit are respectively connected with the microcontroller.

The invention relates to a rotating and positioning device, and in particular to a stick-slip rotating and positioning device. The invention aims to solve the problems that the existing rotating and positioning device cannot be used in working occasions of ultralow temperature, ultravacuum, high electric fields or high magnetic fields and the like, and the rotating and positioning device in the prior art is large in size and large in positioning error. The device comprises a rotating unit, a driving unit and a base, wherein the rotating unit comprises a first rotating semicircular table and a second rotating semicircular table; the driving unit comprises a driving elastic table and a driving rotating plate; the base comprises a drill base and a piezoelectric actuator; multiple groups of flexible hinges are processed on the upper end surface of the driving elastic table; a fork structure is arranged at the bottom end surface of the driving elastic table; a driving rotating plate is arranged at the bottom of the fork structure; the driving unit is arranged at the top of the driving elastic table; the driving elastic table is arranged on the drill base; and the piezoelectric actuator is arranged in the drill base. The stick-slip rotating and positioning device is used for micro-nano operation experimental study.

The invention provides a 3D printing wall unit, a 3D printing wall system and a manufacturing method thereof, and relates to the technical field of building 3D printing. The 3D printing wall unit comprises a first wall; the first wall comprises an inner wall plate, an outer wall plate, and reinforcing ribs ; the outer wall plate is arranged at the outer side of the inner wall plate and the end portion of the inner wall plate is connected with the end portion of the outer wall plate, so that the inner wall plate and the outer wall plate are enclosed to form a cavity, and the reinforcing ribs are arranged in the cavity and separately connected with the inner wall plate and the outer wall plate; and cross sections of the inner wall plate and the outer wall plate in the horizontal direction are both in a U shape, the existing technical problems that the construction of traditional bus platform and so on is long in construction period, high in cost and difficult to guarantee the construction quality in the prior art are solved, the overall strength and construction quality of the first wall are improved due to the adoption of 3D printing, the arrangement of the reinforcing bars has a good strengthening effect on the structural strength and stability of the first wall, and the U-shaped structure design meets design requirements and improves the universality of the first wall.