31results about How to "Increase difficulty" patented technology

The present invention is related to a three-dimensional graphene oxide microstructure and making method of thereof. First, a photoreactive agent is added into a graphene oxide solution, wherein the photoreactive agent is a photoreactivator in a nonlinear optical method. Then, the photoreactivator in the graphene oxide solution is activated by a beam emitted from an excitation module to produce singlet oxygen with high activity. Finally, the graphene oxide is activated by the singlet oxygen for an unpaired electron of the graphene oxide covalently bonding with another graphene oxide to form a three-dimensional graphene oxide microstructure. Therefore, two-dimensional graphene oxides are efficiently cross-linked with each other to form a three-dimensional graphene oxide microstructure by a nonlinear optical technique of an ultrafast laser system so as to apply to the development of all electronic and optical components.

A repaired gas turbine blade includes a turbine blade body having a monocrystalline airfoil made of a first nickel-base superalloy, and a repair squealer tip welded to a tip of the airfoil. The repair squealer tip is made of a second nickel-base superalloy different from the first nickel-base superalloy and having less than about 0.15 weight percent total of carbon, boron, silicon, zirconium, and hafnium.

The invention discloses a free networking method of an RS485 communication terminal. A master station is in unidirectional semi-closed-loop serial connection with slave stations; the master station sends a networking command to a first slave station, starts overtime timing and waits for response information; after the first slave station receives the networking command, the first slave station takes the received slave station address as its own address, returns the response information, and adds one to its own address and sends the address to a next slave station; if correct response information is received in the overtime range of the master station, the received slave station address is stored, timing is restarted, and the response information of the next slave station is waited; after the next slave station receives the networking command, the next slave station takes the received slave station address as its own address, returns the response information, adds one to its own address and sends the address to a next slave station until the master station is overtime, and a networking finishing command is sent through an RS485, thus finishing the networking process. According to the method, the wiring is simplified; moreover, the address of each slave station can be allocated automatically, accurately and rapidly without manual intervention; the positions of the slave stations can be freely placed or replaced; and the debugging is efficient and convenient.

The invention discloses a raw material pretreatment method for a straw-based seedling raising pot, a product and a production method of the seedling raising pot. The raw material pretreatment method comprises the following steps: straw materials are dried, subjected to impurity removal and crushed; water accounting for 1.5-6 times by mass of the straw materials is added for wetting; cooking or steam explosion or combined treatment of cooking and steam explosion is performed; cooling is performed; drying and crushing are performed. With adoption of the method, the usability of the straw-based seedling raising pot can be improved, the dosage of an adhesive can be used, and the production cost can be reduced.

Dental devices and systems and methods for making dental devices are described herein. In some embodiments, denture base material may be adapted to fit a model of a patient's mouth, and a pre-set arch of denture teeth may be adjusted the model. The pre-set arch may be impressed into the denture base material to create a channel. In some embodiments, the cure may be a partial cure and/or a releasing agent may be used such that the pre-set arch may be removed, if needed for further adjustments, after assessing the fit of the denture device. If the fit is correct, another cure may be performed to finish the denture device. If the fit is incorrect, a new bite registration and/or adjustments to the denture base material and/or pre-set arch of denture teeth may be made.

The invention relates to a kind of linearity slide rail with combined type end cover and its assembling method. The structure of the end cover combination mainly includes foundation support, the outer cover. The reflux patch in the end cover combination is divided into opening path and reflux cover-shut. This can make the assembling manufacture-procedure be simpler and more convenience to reduce the time of the assembling, relatively reduce the cost of the manufacture of the linearity slide rail. And because of the structure design of the end cover combination, the assembling method of its rolling element is more convenience and quicker, and unrestricted relatively by the small size, and the assembling efficiency of the linearity slide can be improved.

The invention discloses a method for extracting microbial genome DNA from poplar wood. According to the method, a CTAB (cetyltrimethyl ammonium bromide) method and an SDS (sodium dodecyl sulfonate) method are combined, and technical parameters of various steps are optimized, so that the genome DNA extracted by virtue of the method has the advantages of being high in concentration and free from pollution; determined by a spectrophotometer, OD260/OD230 and OD260/OD280 values are close to standard values, completely satisfying requirements of 16S rDNA/ITS sequencing and metagenomics sequencing adopted in the later period; therefore, the method can be directly applied to a molecular operation.

The invention belongs to the technical field of inorganic light emitting materials, and discloses an anti-counterfeiting label material with a double-mode light emitting function, a preparation methodand application thereof. The chemical formula of the anti-counterfeiting label material with the double-mode light emitting function is NaGdF4:0.50Yb/0.20Eu@NaGdF4:0.15Ce@NaGdF4:0.50Yb/0.20Tb@NaYF4;a plurality of layers of core-shell structures of the anti-counterfeiting label material with the double-mode light emitting function are synthesized in a mode of coating layer by layer; the thicknessof the shell layer is regulated and controlled by regulating and controlling the feeding molar ratio of each layer. The anti-counterfeiting label material disclosed by the invention has the double-mode light emitting function; moreover, the double-mode light-emitting colour has a large regulating range; the anti-counterfeiting label material with the double-mode light emitting function is high instability and high in repeatability, and has good practical and industrial prospects.

The invention discloses a polycrystalline silicon reducing furnace which comprises a chassis, an electrode arranged on the chassis and a bell jar arranged above the chassis, wherein silicon core rodsare mounted, in one-to-one correspondence, on the electrode; multiple bottom air inlet nozzles are formed in the chassis while multiple top air inlets are formed in the chassis; the top air inlets areconnected with top air inlet extension pipes; the top end of the top air inlet extension pipes are connected with top air inlet nozzles. According to the polycrystalline silicon reducing furnace disclosed by the invention, the chassis is directly connected to the top of the reducing furnace through a pipeline, then the problem of non-uniform reaction temperature in the reducing furnace is solved,an effect of balancing material distribution in the reducing furnace is realized, and the product quality is improved; meanwhile, additional workload on the furnace assembly/disassembly is avoided, and the disassembly is easy, convenient and practical.

The invention provides a chiral purification method of a compound C. The compound C is a crude product (S,S)-8-benzyl-2,8-diazabicyclo[4.3.0]nonane with chiral purity ee of 90%-98%. The chiral purification method comprises the following steps: forming haloid salt from the compound C, and further crystallizing and purifying the compound C haloid salt to obtain a high-purity refined product haloid;carrying out alkali treatment and toluene extraction on the refined high-purity haloid acid salt to obtain the high-chiral-purity (S,S)-8-benzyl-2,8-diazabicyclo[4.3.0]nonane. According to the process, a relatively expensive optical resolving agent is prevented from being used for secondary resolution, and the whole process is simple to operate due to the fact that the refined product is insolublein water and an organic solvent is easy to extract; besides, the refining yield is greater than 90%, which is far higher than the yield of secondary resolution of the resolving agent, so that the method is easy to amplify and suitable for industrial production.

The embodiment of the invention provides a retrieval method and device based on segmentation difficulty sample generation, and the method comprises the steps of increasing the difficulty degree of each original ternary image group in a sample set of an original ternary image group through employing all samples in the sample set of the original ternary image group; and in a first stage of the THSG,increasing the difficulty degree of the positive sample pair, so while the difficult positive sample pair is obtained, it is guaranteed that the label of the difficult positive sample pair is consistent with the label of the original positive sample pair; increasing the difficulty degree of the original negative sample in the second stage, obtaining the final difficult negative sample and the final difficult positive sample pair, and improving the effective usability of the sample set. Furthermore, a final difficult ternary sample group is used, and effective difficult samples can be supplemented for fewer training sets, so that the model can be better trained. Meanwhile, a more robust and robust feature extraction retrieval model is obtained through training by using difficult sample pairs.

The invention relates to a method for measuring current of a switch integrated into a power module. A current sensor used in the method comprises a Rogowski coil and a processing circuit. The two Rogowski coils are integrated in the power module to form a differential Rogowski coil, the processing circuit is located outside the power module, the output ends of the two Rogowski coils are connected with the input end of the processing circuit, and the grounding ends of the two Rogowski coils are connected with the grounding end of the processing circuit; the Rogowski coil is etched on an island structure of a copper layer on a DBC substrate of an internal packaging structure of the power module in a plane mode, the Rogowski coil is not electrically connected with the copper layer on the DBC substrate, and a current-carrying conductor of a tested switching current of the power module is located above the Rogowski coil and is not in contact with the Rogowski coil. The two Rogowski coils are symmetrically located on the two sides of the current-carrying conductor. On the premise that an existing packaging structure of the power module is not changed, the Rogowski coil is integrated into the power module only by changing partial structural layout, and the problem that an existing Rogowski coil broadband and a current sensor are difficult to integrate is solved.

The invention discloses a fixing device for ball workpiece machining. the fixing device for ball workpiece machining comprises a base, supporting seats are arranged at the two ends of the base in a sliding manner, arc-shaped clamping rings are movably arranged on the supporting seats, a supporting ring located between the two supporting seats is further arranged on the surfaces of the supporting seats, cavities are formed in the supporting seats, a sliding groove communicated with the cavities is formed on the upper end face of the base, a lead screw rod is rotatably arranged in each cavity, a right-hand thread structure is formed on a front section of each lead screw rod, a left-hand thread structure is formed on a rear section of each lead screw rod, lead screw nuts are fixed to the lower ends of the supporting seats, and the right-hand thread structures and the left-hand thread structures are sleeved with the two lead screw nuts correspondingly. The problems that when ball workpieces are machined, due to the particularity of the structures of the ball workpieces, the ball workpieces are extremely prone to sliding in the clamping process, the difficulty degree of subsequent machining is increased, the workpieces are extremely prone to being damaged, and the machining cost is increased are solved.

The invention discloses an environmentally-friendly barrel, and relates to the technical field of energy conservation and environmental protection. The environmentally-friendly barrel includes an environmentally-friendly barrel body, and an inward recessed installation space is formed, located on the lower side the handle, in the environmentally-friendly barrel body. A first horizontal block is fixedly connected, in the installation space, to the environmentally-friendly barrel body, and the first horizontal block is provided with a locking assembly. When a locking column of the locking assembly is in a locked state, a moving wheel is located in the recessed installation space, and at this time, the environmentally-friendly bucket cannot be moved by the moving wheel. When the locking column is in a non-locking state, the moving wheel is partially or completely located outside the recessed installation space, and the environmentally-friendly bucket can be moved by the moving wheel at this time. The trash can has a certain anti-theft function, a lid is easily opened, and the use is convenient.

The patent of the invention discloses a novel directional waste recycling and reusing system and method for e-commerce platforms such as Taobao and Jingdong. According to the novel directional waste recycling and reusing system and method for the e-commerce platforms such as the Taobao and the Jingdong, two classes are divided, namely, waste recycling and reusing of one class of the e-commerce platforms and waste recycling and reusing of the other class of seller online shops; the directional waste recycling and reusing refers to comprising an e-commerce platform information comprehensive processing module, a regional garbage management field and information management module thereof, a purchaser purchasing a special truck and information processing module thereof, wherein the three modules are in mutual information communication operation, a purchaser uses the special truck to check the module information to recycle all waste materials generated by the transaction of the e-commerce platforms to a garbage management field for classification and packaging offline, and sales manufacturers or the online shops with demands can recycle and circulate repeatedly, so that resources are saved, mixing with household garbage is prevented, the environment is protected, and good operation of recycling is strongly supported by economic benefits generated by recycling.

The invention relates to the field of cables, and particularly discloses a termite-proof cable and a preparation method thereof. The termite-proof cable comprises a core layer and a sheath, the sheathis prepared from polyvinyl chloride, polyethylene, polyamide fibers, a dispersing agent, an antioxidant and an anti-termite agent, the anti-termite agent comprises a rosin extract, bifenthrin and capsaicine, and methyl carbamate and sulfated castor oil are added into the rosin extract for modified extraction in the extraction process. The preparation method of the termite-proof cable comprises the following steps of: firstly preparing a core layer, and then mixing, heating and extruding the raw materials of a sheath, so that the sheath wraps the outer side of the core layer to form the termite-proof cable. The termite-proof cable provided by the invention has relatively good termite-proof performance and relatively good mechanical properties.