44results about How to "Not difficult" patented technology

The invention provides a grid-connected photovoltaic power generating system based on a novel direct current converter and a working method of the grid-connected photovoltaic power generating system. The grid-connected photovoltaic power generating system is characterized in that the grid-connected photovoltaic generating power system consists of a direct current converter, a grid-connected inverter, an isolation transformer and a control circuit; the working method comprises the steps as follows: 1. collecting signal; 2. MPPT module data processing; 3 applying an MPPT arithmetic; 4 inverter module data processing; 5. applying a grid-connected arithmetic; and 6. applying SPWM arithmetic. The grid-connected photovoltaic power generating system and the working method thereof have the advantages of small technical realization difficulty, obviously reducing the cost, flexible installation, convenient maintenance, high voltage and current detection precision, advanced control arithmetic, quick running speed of control chip, the system being capable of obtaining excellent tracking precision and stability, combining the hardware device with the software programming of a digital signal processor, simple design, low cost and easy realization of the hardware device, brief and understandable software programming arithmetic.

This invention provides a method for preparing trans-4-acetoxy-2-methyl-2-crotonaldehyde. The method comprises: reacting isoprene and tert-butyl hypochlorite in acetic anhydride solution to obtain chlorine-containing ester, reacting with urotropine, and hydrolyzing to obtain trans-4-acetoxy-2-methyl-2-crotonaldehyde. The method has such advantages as few reaction procedures, easy operation, high isoprene conversion rate, high yield (40-56%), no need for DMSO during the oxidation process, no byproduct, low raw material cost, easy recovery of solvent, little environmental pollution and low cost, and is suitable for industrial production.

The invention discloses a method for treating underground arsenic water by using Fe (II) and Mn (II) coexisting with arsenic in underground water. The arsenic removing method comprises the steps of oxidation, micro-flocculation, contact filtration, backwashing water concentration, ferrimanganic particle FeMnOyHy and the like. In addition, an arsenic removing activity filter membrane with arsenic removing activity can be formed on the filter medium surface load of a contact filtration pond and can be used as another barrier for removing arsenic. The method is used for removing arsenic in a drinking water source, treatment water can reach the limit requirements (smaller than 10 mug/L) for arsenic in latest national Standards for Drinking Water Quality (GB5749-2006), and the indexes of ferrum, manganese, turbidity and the like can also reach the national standards. In addition, the method can be also used for removing heavy metals such as copper, chromium, cadmium, lead, antimony and the like and contaminants such as ferrum, manganese and the like in the drinking water source.

The invention provides a method for networking and cascading electronic equipment by using a universal serial port technique, which consists of a computer universal serial port, a primary equipment port A, a primary equipment port B, a primary equipment electric level transforming unit, a primary equipment control unit, a slave equipment port A, a slave equipment port B, a slave equipment electric level transforming unit, a slave equipment control unit and a slave equipment optical-coupling unit, wherein the computer serial port is connected with the main equipment port A; the main equipment port B is connected with the slave equipment port A; the slave equipment port B is connected with the next slave equipment port A; a computer sends data to the equipment in manner of broadcasting; the equipment returns the data to the computer in manner of time division multiplexing. The method for networking and cascading electronic equipment by using the universal serial port technique not only realizes data transmission between the computer and the equipment but also is simple, low-cost, not difficult in development and debugging, and easy for maintenance.

A common advertisement delivering method in places such as supermarkets and shopping malls has problems that target consumers are difficult to be locked and the advertisement delivering efficiency is low. The invention discloses a method for realizing advertisement accurate delivery by using selected commodity information of consumers. The method comprises the steps of establishing association between delivered advertisement information and specific commodity information, generating a personalized advertisement, and delivering the personalized advertisement. By adopting the method disclosed by the invention, the advertisement delivering efficiency can be improved, income sources of supermarkets and shopping malls are expanded, and consumers are facilitated to acquire interested information at the same time.

The invention discloses a method of processing a decryption task among PC ends of multiple decryption machines. The method comprises steps: a PC client end pushes a decryption task to a middleware system, the middleware system judges whether a corresponding task queue exists, and if not, the decryption machine is prompted to be occupied; if yes, the task queue is pressed in a queue and waits for being processed; a thread is opened to read the information of the task queue, if no available task queue exists, a task queue pool is returned for waiting, or otherwise, the corresponding decryption task information is sent to the decryption machine; the middleware system requests whether the decryption machine has an spare board card according to the decryption task information, if not, decryption full-load task information is assembled, and the board card state of the decryption machine is set to be full; or otherwise, the task leaves the queue, and the decryption task is sent to the decryption machine for decryption; and after the decryption machine completes decryption, the decryption information is called back to the PC client end for real-time monitoring and deployment. Deployment of a complicated task among multiple decryption machines can be realized, and the decryption information security is ensured at the same time.

The invention discloses a cultivation process under a forest of zhijin bamboo fungus. The cultivating process comprises the following steps of preparing mushroom-sticks with zhijin bamboo fungus mycelium according to a conventional method; transferring the mushroom-sticks with the zhijin bamboo fungus mycelium to a forest land with more than 70% covered canopy density for cultivation. The processhas the advantages that the cultivation process adopts soil under the forest to cultivate the mushroom-sticks to achieve the natural environment cultivation of the fungus, ensures that the mycelium growth environment is ventilated, and easily removes pests and diseases, reduces the phenomenon of low yield, dead mushrooms and rotten mushrooms' caused by lack of oxygen in the process of mycelium cultivation, and the yield of the mycelium is improved. The cultivation process improves the yield of the zhijin bamboo fungus compared with a traditional planting process, reduces the production cost, shortens the cultivation period, avoids the risk of mass production, and effectively promotes the development of the zhijin bamboo fungus poverty alleviation industry.

The invention provides a novel pipe joint, which has necessary and sufficient functions as a pipe joint such as for a water supply steel pipe, and simultaneously improves an application property. The pipe joint (1) provided by the invention comprises: straps (5, 5) which are welded on a part of the external circumferential surface of each connection end (4, 4) of two connected pipes (3, 3) and are used for fixing flanges; and a pair of plate-shaped flanges (6, 6) which extend along a direction parallel to a pipe shaft, and are formed at external sides of the straps (5, 5) for fixing the flanges at two positions opposite to the radial directions of the pipes, wherein connection holes (7, 7) for inserting fasteners are arranged on each flange, and the straps (5, 5) for fixing the flanges enable the pipe shafts to only extrude a specified distance to the external parts away from the end edges.

The invention discloses a magnetic suspension type motor base. A transmission main shaft of the motor base is in rigid connection with an output shaft of a motor through a coupling; an upper magnetic ring, a middle magnetic ring and a lower magnetic ring are circular hollow magnets; the transmission main shaft penetrates through central circular holes of the upper magnetic ring, the middle magnetic ring and the lower magnetic ring from top to bottom, wherein the transmission main shaft is tightly connected with the middle magnetic ring; the upper magnetic ring and the lower magnetic ring are movably connected with the transmission main shaft; gaps are reserved among the upper magnetic ring, the middle magnetic ring and the lower magnetic ring; the upper magnetic ring, the middle magnetic ring and the lower magnetic ring are fixed in an upper magnetic ring seat, a middle magnetic ring seat and a lower magnetic ring seat; an upper auxiliary excitation coil, a middle auxiliary excitation coil and a lower auxiliary excitation coil are arranged on the upper magnetic ring, the middle magnetic ring and the lower magnetic ring respectively; and the upper magnetic ring seat, the middle magnetic ring seat and the lower magnetic ring seat are fixed on a top seat through a plurality of long screws. By the magnetic suspension type motor base, counter-acting force can be transferred to the magnetic suspension type motor base by magnetic force, and axial force born by a motor bearing can be reduced or even eliminated.

The invention relates to a combined concrete rectangular sunk well basin and a construction method thereof. The combined concrete rectangular sunk well basin is formed by enclosing the river channel offshore soil body by an enclosing structure and digging to remove the internal soil body, wherein the enclosing structure is a U-shaped structure defined by a group of rectangular sunk wells which sink section by section respectively; the opening of the U-shaped structure faces the river channel, and the top surface is cast in place with continuous reinforced concrete top plates; two opposite walls of the U-shaped structure are spaced by a pre-cast concrete connecting beam; the bottom surface of the pre-cast concrete connecting beam clings to the bottom surface of the basin; the cavity of the rectangular sunk well is sequentially provided with a rubble layer, a bottom sealing concrete soil layer and a backfill sand layer from bottom to top. The combined concrete rectangular sunk well basin has the advantages of strong structural integrity and good stability, is simple to construct and convenient to operate and implement, does not need investment in special mechanical equipment and dedicated materials, imposes relatively little influence on neighbor buildings and structures during construction, and the like, and can be widely applied to the basin construction of river channels or seas.

The invention relates to a calculation method for predicting flight arrival time based on an air trajectory and big data. The calculation method comprises landing runway prediction calculation, landing time prediction calculation and upshift time prediction calculation. The flight historical big data with the highest simulation degree under all factors is adopted as a matching prediction sample, the matching prediction sample has the high matching degree with real operation, the requirement for a data source needed by calculation is not high, the technology implementation difficulty is not large, product conversion can be rapidly achieved even in small and medium-sized airports with low data conditions, the method has the high copy popularization performance, and the method is suitable for popularization and application. A prediction mechanism and algorithm for flight landing time and wheel chock getting-on time in a flight control area to which an airport belongs are established by performing staged modeling and state recognition on an air running track of an aircraft and taking big data statistical analysis as a main technical means, so that accurate reference is provided for an airport ground support system; the method can effectively reduce wait wait or delay in place of airport ground support resources, and effectively improves the utilization rate of the ground support resources.

The present invention is used in rifling weapon and has the technological feature that the rifle material dissimilar to that of gun barrel is hard alloy with high hardness at high temperature, high wear resistance and high toughness at high temperature, and is first rolled into rifle and then embedded into gun barrel to form high strength and long life smooth rifle. The wear resistance of rifle is essential to the performance and service life of weapon, and the technology of the present invention can solve the problem of short life radically. The present invention may be used in raise performance of weapons greatly.

The invention discloses a novel microplasma device containing a floating electrode. An aluminum foil is adopted in the device as a material base; dense array micro-cavities are arranged on the aluminum foil; the inner part of each micro-cavity is provided with an alumina layer as a medium layer so that a basic Al/Al2O3/Al coplanar electrode structure can be formed; both ends of each micro-cavity are relatively larger than the middle part in size; alumina exists only between both ends of each micro-cavity; pure aluminum remains between adjacent micro-cavities as the floating electrode so that an integral micro-cavity array is formed; simultaneously the two partial aluminum foil bases insulated at the upper and the lower sides of each micro-cavity are used as the electrodes of the device; after the upper and the lower electrodes are guided out, the whole base is sealed and vacuumized with glass so as to obtain the final novel microplasma device containing the floating electrode. The device is simple in structure and convenient to manufacture, can reduce the minimum sustaining voltage of discharging, and the luminescent efficiency is improved.

The invention relates to a fire-fighting-purpose hornet's nest processing device suitable for multiple scenes. The device comprises a medicine box, a medicine pump, a spray pipe, a holder device and alaser collimation and distance measurement device, wherein the medicine box stores a medicine liquid capable of killing hornets, and the medicine liquid is flammable; the medicine pump is connected with the medicine box; one end of the spray pipe is fixed on the holder device and communicates with the medicine pump, and the other end of the spray pipe is provided with a spray head with an igniter; the holder device is connected with a holder controller in the control box; and the laser collimation and distance measurement device is fixed on the spray pipe and is connected with a vision processor in a control box. The device is in multi-scene design, can be mounted to an unmanned aerial vehicle to realize a remote operation, and also can be mounted to a long stick and a ladder so as to carry out hornet killing disposal on a jungle or a small corner where the unmanned aerial vehicle is difficult to reach. In addition, for a multi-story building and a high-rise building, the processing device can be downwards hoisted by a rope from a high floor or an attic to be used.

The invention discloses a lightweight winding type flexibly-retractable roof and belongs to the technical field of retractable roofs. A stepping motor is arranged at the top of a carrying table, a first belt wheel is arranged at the output end of the stepping motor, and a winding roller is arranged between two sets of supporting frames. Guide rails are arranged on the front and back sides of a rigid supporting frame correspondingly. A flattening roller is arranged at the top of the left end of one of the guide rails. An elastic sealing mat is arranged at the top of the rigid supporting frame.A pulley is arranged at the right end of the other guide rail. Rolling wheels are nested in assembling grooves correspondingly. A winding block is provided with a first slide groove, a nylon rope is arranged in an inner cavity of the first slide groove in a winding mode, and the nylon rope is clockwise wound on the pulley and then is movably connected with a second belt wheel. A clamping device isarranged at the top of a connecting frame. The lightweight winding type flexibly-retractable roof is reasonable in structure design, the defects of an existing integrated-structure retractable roof with a large area can be overcome, and the lightweight winding type flexible-retractable roof is economical, safe and reliable so as to be widely applied to more places.

The invention provides a CO poisoning prediction method based on meteorological data. The CO poisoning prediction method comprises the following steps: acquiring historical meteorological data and COpoisoning case number of a to-be-predicted region; dividing the CO poisoning case number into k levels; selecting significant correlation effective features by using parson correlation analysis and partial correlation analysis; constructing an ordered multi-classification Logistic regression model of the CO poisoning risk level y according to the selected effective feature set X; and obtaining andsubstituting meteorological data of a to-be-predicted region on the same day needing to be predicted into the regression model to calculate the probability Pj of each CO poisoning risk level, and thej value corresponding to the maximum value max (p) of Pj being the predicted CO poisoning risk level. The CO poisoning prediction method based on meteorological data can predict the CO poisoning risklevel, and the CO poisoning prediction is simple and convenient.

The invention discloses structure for forming temperature compensated crystal oscillator on printing circuit board (PCB). First, several crystal connection plates are arranged on PCB in mode of parallel arrangement. Then, several IC circuits possessing function of temperature compensation are setup between any two adjacent crystal connection plates; and resin is filled for seal. After complete seal, quartz crystal is pasted above each IC, and each piece of quartz crystal is cross connected between two adjacent crystal connection plates so as to cover corresponding IC.

The invention discloses a symmetric decoding device of a polarization code, which comprises a modulation system of a CRC-SCL decoding algorithm and the CRC-SCL decoding algorithm, and the CRC-SCL decoding algorithm comprises the following steps: step 1, starting the symmetric decoding device, setting an input signal according to a given numerical value, and then inputting a signal needing to be decoded; step 2, approximately calculating transition probability recursion of L paths by using a calculation method of transition probability in a logarithm domain according to the signal input in the step 1; and step 3, recursively transmitting the calculated transition probabilities to a transition probability memory according to the transition probabilities of the L paths calculated in the step 2. According to the invention, the L candidate paths of the SCL algorithm are verified by using CRC verification, and the most reliable path satisfying the CRC verification is used as an output decoding path. The CRC-SCL decoding algorithm effectively reduces the misjudgment of a decoding path, the performance of the decoding algorithm is greatly improved, and the algorithm is convenient to realize by an FPGA.

The invention discloses multifunctional integrated pretreatment equipment for industrial salt processing, and belongs to the technical field of industrial machinery. The pretreatment equipment comprises a smashing assembly, an impurity removing assembly and a recycling assembly, the smashing assembly comprises a supporting rod, a feeding box, a conveying crawler belt, a driving roller, a driven roller, a material entering box and a smashing box, the driving roller is arranged on the supporting rod, the driving roller is rotationally connected with the supporting rod, the conveying crawler belt is arranged on the driving roller in a wound mode, the feeding box is arranged on the supporting rod, a material entering box is arranged on the driven roller, the driven roller is rotationally connected with the material entering box, the material entering box is in sliding contact with the conveying crawler belt, the smashing box is arranged at the lower end of the material entering box, the impurity removing assembly comprises an impurity removing box and an impurity discharging opening, the impurity removing box comprises a heat exchange cavity, a filtering conveying belt, a dryer and an impurity removing box body, and the recycling assembly comprises a smoke return opening, a smoke flushing barrel, a drying barrel and a heat exchange pipe. The pretreatment equipment has the pretreatment effect before industrial salt processing.

The invention discloses a method for brewing longan wine. The method comprises the following steps: by taking longan as a raw material, smashing the longan, boiling, cooling, adding distiller's yeast for fermentation, distilling, and cooling, thereby obtaining the longan wine. 3-10% of the raw materials are added for distillation, and the distiller's yeast is rhizopus koji which accounts for 1.5-6% of the raw material amount. As the longan as both a medicine and a food is adopted as the raw material, effective components beneficial to human bodies are sufficiently extracted, and furthermore a fermentation product is added, so that original nourishing effects of the longan are improved. The longan wine made by using the method is full in taste, conspicuous in longan fragrance, high in clarity of a wine body and bright in wine color.