37results about How to "Simple conversion method" patented technology

The invention provides a travel companion-bicycle, comprising a handle bar, a front fork, a clothes rack, a double bracket, a saddle, a saddle tube, a front wheel, a rear wheel, a shock absorber, transmission chains and the like; the bicycle is also provided with a frame constituted by a front frame tube, a front ear tube, an upper frame tube, a lower frame tube, an upper frame fork, a lower frame fork and the like; the end part of the upper frame tube is provided with an A double-spindle hinge, one of the spindle is connected with the front ear tube and the other spindle is connected with the saddle tube; the lower frame tube is provided with a B single-spindle hinge; a C single-spindle hinge is arranged between the lower frame tube and the front frame tube; a D single-spindle hinge is provided with the upper frame fork and the lower frame fork; the four hinges of A, B, C and D rotate synergistically, so as to enable the frame and the saddle base to be folded; and two rotating wheels are arranged at the end part of the double bracket. The invention has the advantages multipurpose and utility; the invention can be used as a bicycle and a bicycle for pulling objects; the switching method from riding to pulling is simple and rapid; and during the switching from riding to pulling, the carried luggage and objects need not to be shifted.

A rhomboid shopping buddy bicycle comprises a handlebar, a front fork, a front fork riser, clothes hangers, a double bracket, a saddle, a saddle tube, a front wheel, a rear wheel, a transmission chain, a shopping basket and the like. A rhomboid similar frame is added, which is composed of a frame front tube, a frame riser, a frame upper tube, a frame lower tube and the like; the frame is providedwith four hinges which are in synergic rotation and can enable the frame to be folded; the end parts of the double bracket are respectively provided with a universal wheel, and the two universal wheels and the front wheel form a shopping traveling system jointly; the end part of the frame lower tube is provided with a positioning snap spring, an A positioning slot and a B positioning slot which are capable of being inserted by the positioning snap spring are arranged at the positions of the front fork riser and the frame front tube corresponding to the positioning snap spring, and when the positioning snap springs are inserted in the A positioning slot and the B positioning slot, the front wheel in the front wheel can only be enabled to rotate rather than to swing. The invention has the advantages of multiple uses and practicability, and is a bicycle as well as a shopping cart, and the method for switching between the bicycle and the shopping cart is simple, rapid and convenient.

Provided are an apparatus and a method for controlling the heating of the base within a chemical vapour deposition chamber, which apparatus is applicable to an MOCVD reaction chamber. The apparatus comprises a heater located within a chamber; a tray located near the heater within the chamber and spaced apart from the heater and used for carrying the base; a first temperature control unit coupled with a surface of the tray for carrying the base and used for measuring the temperature of the tray surface and outputting a first control signal as a function of a set temperature and the temperature of the tray surface; and a second temperature control unit connected to the first temperature control unit and used for measuring the temperature of the middle of the area between the tray and the heater, and also for outputting a second control signal as a function of the first control signal and the temperature of the middle, with the heater being coupled with the second temperature control unit to heat according to the second control signal. Further provided is a method for controlling the heating of the base within a chemical vapour deposition chamber. A steady base temperature can be obtained via the apparatus.

The invention relates to a high-precision simple A / D converting circuit and a method based on MSP430. The invention adopts the P2.0 port of the MSP430 to be externally connected with a resistor and a capacitor which are serially connected; the other end of the resistor is connected with the P2.3 port of the MSP430, the other end of the capacitor is connected to the power supply ground. An analog signal is connected to the P2.4 pin of MSP430F1121 to form a sigma-delta resembling type single-slope A / D converter. The conversion method is realized by that a half of the total count value N / 2 is loaded at first, and whether the output of a comparator is high level is determined, if yes, the P2.0 outputs low level; if not, the P2.0 outputs high level; the count value of the high level adds 1, the total count value N / 2 deducts 1, whether the total count value N / 2 is 0 is judged, if not, then the step is skipped previous, if yes, the P2.3 and the P2.4 pins are exchanged internally, and then the measurement sub-program is over. The invention solves the problem that the over-sampling sigma-delta conversion is applied due to the characteristic of high resolution, but the over-sampling sigma-delta conversion has complex structure, large volume, and hard operation. The invention achieves the effects that the conversion method is simple, the circuit structure is simplified, the volume is small, the cost is low, and the method can be easily implemented.

The invention discloses a DNA protective agent and a DNA sulfite conversion method, and relates to the technical field of DNA methylation state analysis and detection. The DNA protective agent comprises hydroquinone, dimethyl sulfoxide and a DNA anti-degradation agent, and the DNA anti-degradation agent is glucomannan and / or arabic gum. The DNA protective agent can obviously reduce damage to DNA in the transformation process, avoid DNA degradation and maintain the integrity of the DNA. Besides, the high conversion rate of the non-methylated cytosine can be realized to a great extent, and the melting temperature of the DNA can be reduced to a great extent, so that the high-temperature denaturation time is indirectly shortened, and the problems of breakage and degradation caused by high-temperature damage of the DNA are solved.

The invention discloses a preparation method for an avian pasteurella genome vaccine. The preparation method comprises the following steps of: performing enzyme digestion on a target gene by using a restrictive incision enzyme Sau3AI; performing enzyme digestion on an eucaryon expression vector PcDNA 3.1(+) by using a restrictive incision enzyme BamHI; performing dephosphorylation on the eucaryon expression vector PcDNA 3.1(+) which is subjected to enzyme digestion by using calf intestinal alkaline phosphatase; connecting an avian pasteurella genome with the eucaryon expression vector pcDNA3.1(+); transform into a colon bacillus competence JM83; extracting plasmids; and identifying through enzyme digestion to obtain the avian pasteurella genome vaccine. As proved by animal experiment detection, the avian pasteurella genome vaccine prepared with the method can be used for reducing the generation of avian pasteurellosis and reducing the invasion of avian pasteurella to birds; and the preparation method is simple and is easy to operate.

The invention discloses a novel isopentenyl flavonoid compound, which is prepared by adopting the following steps: (1) taking Epimedium medicinal materials, pulverizing or not pulverizing, and extracting 1-3 times with a solvent, extracting 0.2-3 times each time After 3 hours, the two extracts were combined and concentrated under reduced pressure to obtain an extract; (2) water was added to the extract to obtain a suspension, the suspension was separated by gradient elution of macroporous resin, and then passed through an ODS column Gradient elution separation was performed, and finally the prenyl flavonoids were purified by high performance preparative liquid phase. The isopentenyl flavonoids can be converted into icariin under the conditions of heating, acid treatment, enzyme treatment, alkali treatment and the like. The invention is easy to operate, and the prepared compound has high purity.

The invention relates to a hollow molecular sieve fiber and a preparation method thereof. The external diameter of the hollow molecular sieve fiber is 1-30 mu m, the internal diameter is 0.5-20 mu m, the length-diameter ratio is 20:1-1000:1, and the specific area is 350-700 m<2> / g. The preparation method comprises the following steps: attaching a small amount of molecular sieve crystal seed to a solid silicon-oxygen-containing fiber used as a silicon source; and by using a steam reforming process, generating a molecular sieve film layer on the solid fiber surface, growing the molecular sieve microcrystal in the normal direction of the molecular sieve film surface, and finally, gradually emigrating the silicon source from inside to form the hollow fiber. The method is suitable for preparing ZSM-5-type, beta-type, Y-type, titanium-silicon-type and other molecular sieves. The preparation method is simple; and the product has the advantages of high purity, complete structure and high mechanical strength, and is suitable to be used as a film separation material or a catalyst for catalytic reaction.

The invention relates to an X-type shopping mate bicycle which comprises an X-type frame A tube, an X-type frame B tube, a frame front tube, a handle bar, a front fork, a front fork upright tube, a clothes rack, a double-bracket, a front wheel, a rear wheel, and the like, wherein a fixed shopping basket is arranged on the clothes rack, and two universal wheels are arranged at the end part of the double-bracket. When the bicycle is used as a shopping cart, the two universal wheels and the front wheel are in contact with the ground, which jointly forms a shopping traveling system; positioning clamping springs are arranged at the end part of the X-type frame A tube, and the front fork upright tube and the frame front tube are respectively provided with an A positioning slot and a B positioning slot in which the positioning clamp springs can be inserted corresponding to the positioning clamp springs; and when the positioning clamping springs are inserted into the A positioning slot and the B positioning slot, the front wheel can rotate, but can not swing, therefore, the direction can be controlled in an ordered way by means of the universal wheels when the bicycle is pushed as the shopping cart. The invention is multipurpose and practical, not only can be used as the bicycle, but also can be used as the shopping cart, has simple, fast and convenient conversion method between the bicycle and the shopping cart and can be freely operated by all people regardless of age and sex.

The invention discloses a method for traffic information transfer among maps of different granularities and belongs to the field of intelligent traffic. The method comprises the steps that a road section set in a processed road network corresponding to road sections in an issued road network is obtained; a covering mileage ratio of each road condition in the road section set is counted; road conditions of the road sections in the issued road network are determined according to the covering mileage ratios of different road conditions, so that traffic information transfer among the maps of the different granularities is accomplished. The simple, efficient and accurate method for traffic information transfer is provided for the issued road network of the city road conditions, the accuracy of traffic information is improved, and the conditions that a transfer result shows that the road sections are jammed and the transfer result deviates from original road conditions are avoided.

The present invention provides a kind of active remote sensing satellite antenna phase center coordinate system conversion method and system, obtain the vector of satellite GNSS antenna phase center under WGS84 coordinate system by GNSS (Global Navigation Positioning System) observation data processing; According to the ground measurement, get the satellite The line vector between the GNSS antenna phase center and the active remote sensing antenna phase center in the body coordinate system; calculate the coordinate transformation matrix from the satellite body coordinate system to the WGS84 coordinate system; calculate the vector of the satellite active remote sensing antenna phase center in the WGS84 coordinate system. The method for converting the active remote sensing satellite antenna phase center coordinate system of the invention is a key step in the precise image processing of the active remote sensing satellite.

The invention relates to a method for obtaining isoxazole and aromatic nitrile from lignin model and preoxidized birch lignin. The method adopts the β-O-4 model compound whose benzyl position is a ketone and hydroxylamine hydrochloride as the reaction substrate, and under the action of additives such as magnesium oxide, the C β ‑O bond preparation of isoxazole compounds, and oximation rearrangement cleavage of C α -C β At the same time, this method can be applied to the conversion of preoxidized lignin to isoxazoles and aromatic nitriles. The preparation process is as follows: mix the β-O-4 model compound or pre-oxidized birch lignin, hydroxylamine hydrochloride and additives in an alcohol solvent, put it in a pressure-resistant container, replace it with nitrogen and seal it, at 120 ° C, stir After 8-12 hours, isoxazole and aromatic nitrile products can be obtained. This method is the first to realize nitrogen-containing compounds such as isoxazole and aromatic nitrile from lignin, and the reaction process is simple, controllable and easy to operate.

The invention relates to a method for catalytic conversion of furfural, which comprises taking furfural and a methanol aqueous solution as raw materials and heating to carry out a reduction reaction on the furfural in the presence of a loaded type nickel-based catalyst, so as to prepare a furfural converted product comprising furan and / or methyl furan as main components. As the methanol aqueous solution is adopted as a solvent and a hydrogen supply reagent of the reaction, the situation that a series of cost and security problems of transportation, storage and operation are caused due to great consumption of external hydrogen can be avoided, methods of catalyst preparation and furfural conversion are simple, the used reagent is non-toxic, operation conditions are mild, the cost reduction and the production benefit improvement can be facilitated, and thus the method has good industrial prospects.

The invention provides a method for evaluating the safety of the AADL model based on the deterministic random Petri net. Firstly, build a hierarchical AADL architecture model; then, formulate a new model transformation method to transform the AADL security model into a DSPN model, in which new semantics are added to the AADL security model, including the operational state in composite components Respectively with the relationship between failure state and danger, and the relationship between recovery event and repair event and error detection, the new model transformation method simplifies the transformation method of error propagation between components and the transformation method of dangerous behavior, making the security The model is converted to a DSPN model with a smaller number of states, which is used to calculate the probability of danger occurrence; finally, the risk of danger occurrence is calculated in combination with the severity level of danger for safety assessment.

The invention provides a travel companion-bicycle, comprising a handle bar, a front fork, a clothes rack, a double bracket, a saddle, a saddle tube, a front wheel, a rear wheel, a shock absorber, transmission chains and the like; the bicycle is also provided with a frame constituted by a front frame tube, a front ear tube, an upper frame tube, a lower frame tube, an upper frame fork, a lower frame fork and the like; the end part of the upper frame tube is provided with an A double-spindle hinge, one of the spindle is connected with the front ear tube and the other spindle is connected with the saddle tube; the lower frame tube is provided with a B single-spindle hinge; a C single-spindle hinge is arranged between the lower frame tube and the front frame tube; a D single-spindle hinge is provided with the upper frame fork and the lower frame fork; the four hinges of A, B, C and D rotate synergistically, so as to enable the frame and the saddle base to be folded; and two rotating wheelsare arranged at the end part of the double bracket. The invention has the advantages multipurpose and utility; the invention can be used as a bicycle and a bicycle for pulling objects; the switching method from riding to pulling is simple and rapid; and during the switching from riding to pulling, the carried luggage and objects need not to be shifted.

The invention discloses a R-test precision ball head detection device, which comprises a five-dimensional manual slide table, an R-test ball head and a mounting seat, and the mounting seat is provided with three mounting surfaces for installing sensors, and for calibration The reference plane A and reference plane B; the mounting seat is fixedly installed on the top surface of the five-dimensional manual slide table, and displacement sensors are fixedly installed on the mounting surface of the mounting seat, and the extension lines of the three displacement sensors are orthogonally intersecting Point P, the center of the R‑test ball head is at point P. The present invention is provided with the mounting seat with datum plane A and datum plane B, can calibrate the detection device itself after installing the sensor, reduces the positioning error when the R-test detection device is installed and positioned on the workbench of the processing machine tool, and makes the volume The error detection result is more accurate and reliable, and the direction vector of the R-test sensor axis can be obtained directly, thus simplifying the conversion method of the subsequent volume error in each coordinate system, and providing convenience for the identification of geometric error.

The invention relates to a genetically engineered strain efficiently expressing alpha-transglucosidase. A host bacterium of the genetically engineered strain is aspergillus niger, and the genetically engineered strain comprises an alpha-transglucosidase gene expression cassette. A genetically engineered bacterium can efficiently express alpha-transglucosidase, and improves the secretion efficiency of alpha-transglucosidase. In addition, alpha-transglucosidase is secreted to the outside of a cell, so that the cost of alpha-transglucosidase extraction purification is lowered, industrial materials are saved, the production cost is lowered, and the genetically engineered strain has an obvious social benefit. The enzyme activity of a crude enzyme obtained after the strain is fermented is improved by 4.0-12.1 times in comparison to a starting strain; a foundation is laid for an application of alpha-transglucosidase in the food industry and industrial production; a bottleneck that alpha-transglucosidase depends on import is broken; and the genetically engineered strain has huge economic and social benefits, and has a broad market development prospect.