52results about How to "Overcoming technical hurdles" patented technology

The invention is applicable to computer aided instruction for engineering drawing. According to different users, the method decomposes relevant functions into different module units including management module based on network, kernel module for judging credit based on detailed analyzing knowledge points, module for students to submit homework, module for completing homework and querying feed back, and networked module for managing titles of engineering drawing. Under specific requirement, the system can implement specific rules for judging credits, possessing better flexibility. According to presetting rules, the method can mark highlighted tags on error positions in graph. Through colors, linewidth, line type, and text discrition, taking full advantage of graphical display, the invention realizes adding artificial comment automatically.

The invention discloses a high-temperature-resistant, high-sugar-resistant and freezing-resistant high-resistant yeast strain and a preparation method thereof. The preparation method comprises the following steps: over-expressing a complete sequence of H/ACA snoRNA (SNR84) by selecting and using a strong promoter PGK1 in a parent yeast strain to obtain the high-resistant yeast strain. The cell activity of the strain is remarkably improved in high-temperature, high-sugar and freezing environments in comparison with that of the parent strain. Saccharomyces cerevisiae are good in high-temperature resistance in heat shock treatment, high-sugar resistance in high-sugar dough and freezing resistance in frozen dough, the technical obstacle and the quality detect in a bread making process are overcome, and the application prospect is wide.

The invention specifically relates to a culture medium prescription for cultivating immature embryo of double-petal paeonia lactiflora and a method for cultivating the seedlings of the paeonia lactiflora by using the culture medium. The culture medium comprises adventitious bud induction culture medium, adventitious bud strengthening culture medium and rooting culture medium; and the culture medium is formed by adding TDZ, cane sugar and agar based on improved MS or 1/2 improved MS. The culture method comprises the following steps: selecting the seedling embryo; preparing the culture medium; and inoculating to cultivate, wherein the step of inoculating to cultivate is the step of adopting the three culture mediums to induce the adventitious bud, strengthen the adventitious bud and root. Because of the invention, the seedling rate of the immature embryo reaches over 60%, and the technical obstacle that the double-petal paeonia lactiflora cannot establish the seedlings caused by the dysplasia of the seedling embryo. Each germination seedling embryo can establish 3-8 adventitious buds and 5-10 fleshy roots, so the effect that the seedlings of the normal seed differentiate the buds after three years is realized, the growth speed of the seedlings of the paeonia lactiflora is improved, the hybrid seedlings of the paeonia lactiflora flowers at early stage, and the breeding period of the paeonia lactiflora is shortened.

The invention discloses a flexible structure for a vacuum-pumping system of a vibratory forming machine used in electrolytic aluminum production. The flexible structure is characterized in that one end of an inner pipe (1) is connected with a vacuum cover on a vibrating table; the other end of the inner pipe is connected with the bottom of a gasbag group (2) after passing through the inner cavityof the gasbag group (2); the whole body of the gasbag group (2) is arranged in an outer housing (3); the top of the gasbag group (2) is connected with the inner side of the top of the outer housing (3); a connecting pipe (4) is arranged on the outer housing (3); and the outer housing (3) is connected with the machine frame or base of the vibratory forming machine. The flexible structure is simple, has low manufacturing cost, and can satisfy the working condition requirement of the vacuum-pumping system of the vibratory forming machine, thereby solving the technical obstacle of retrofitting a vacuum-pumping system to a domestic vibratory forming machine and filling the gap of domestic technology in the link.

The invention belongs to the technical field of storage and transportation of a new energy source namely hydrogen energy, and in particular relates to an ammonia borane composite hydrogen storage material and a preparation method thereof. The ammonia borane composite hydrogen storage material is prepared by loading ammonia borane into a porous coordination polymer by adopting an impregnation method. The composite material disclosed by the invention reduces the thermal decomposition hydrogen release temperature of ammonia borane, accelerates hydrogen release kinetics, avoids generation of volatile byproducts, solves technical obstacles for taking ammonia borane as a hydrogen source material, and provides probability of applying a hydrogen energy source to vehicles and industries. Meanwhile, the preparation method is simple and feasible, low in cost and good in effect.

The invention discloses an automatic grinding and mixing device for an ultrahard material. The automatic grinding and mixing device comprises a base and a supporting barrel, wherein a cover plate is arranged at the top of the supporting barrel; a hard alloy mortar is arranged at the bottom of an inner cavity of the supporting barrel; a nut is arranged in the center of the cover plate; a screw rod is screwed in the nut; the bottom end of the screw rod extends into the supporting barrel and is connected with a rotary supporting plate; the rotary supporting plate is downwardly and fixedly connected with an upper hinge; the upper hinge is downwardly hinged with a lower hinge; the lower hinge is connected with a hard alloy grinding head; the top end of the screw rod extends out of the nut and is connected with a positive and negative rotation motor; the bottom of the positive and negative rotation motor is fixedly connected with a motor supporting plate; one side of the motor supporting plate is connected with a guide sleeve; an anti-rotation guide rod glidingly penetrates through a through hole of the guide sleeve; the bottom end of the anti-rotation guide rod is fixedly connected to the top of the cover plate. In short, the labor intensity of an worker can be reduced, an actual state of a manual grinding and mixing process can be automatically simulated, the defect of high material uniformity difference caused by the manual grinding and mixing process can be avoided, and the technical obstacle in producing high-quality diamond and cubic boron nitride polycrystalline composite sheets can be overcome.

The invention relates to a method for removing heavy metals and radioactive elements in ionic type mixed rare earth material liquid. The method is characterized by comprising the following steps: performing acid decomposition on ionic mixed rare earth to form the ionic mixed rare earth material liquid; performing extraction and separation by using an ammonia-free saponified organic extracting agent and the ionic mixed rare earth material liquid, wherein the heavy metals and the radioactive elements are extracted into an organic phase, and the rare earth material liquid after impurity removal is in a water phase; performing back extraction on a loaded organic phase, so that the heavy metals, the radioactive element and other impurities in the loaded organic phase and a small quantity of extracted rare earth are all subjected to back extraction; removing the heavy metals and the radioactive elements in back extraction liquid by adding a heavy metal, uranium and thorium removing agent, so that wastewater after impurity removal reaches the standard to be discharged. According to the method provided by the invention, the contents of the heavy metals and the radioactive elements are reduced from a source, so that the follow-up sewage heavy metal and radioactive element treatment procedures are omitted, the sewage treatment cost is reduced, and meanwhile, sewage is discharged after reaching the standard.

The invention provides a method for realizing a mini-program tab. The method comprises the following steps: acquiring data of a tree-shaped tab of a mini-program; rendering the tree-shaped tab according to the data; responding to a user instruction, associating the tree-shaped tab corresponding to the user instruction with the data, and unfolding or folding the tree-shaped tab. According to the embodiment of the invention, the technical index for managing the applet by adopting the tree-shaped tab is improved; According to the technical scheme, the small program can be managed in a tree tab mode, the technical obstacle of an original assembly is overcome, the user experience is enhanced, and therefore the small program not only meets the user requirement in the using function, but also ismore user-friendly in application management and convenient to operate, and the application value of the small program is improved.

A multi-gene carrier system is composed of a receptor carrier and at least two donor carriers, and is prepared by altermative gene assemblings with the said carriers. It can be used for conversion of multiple genes to obtain different genetically engineered products and multi-gene expression characteristics.

The invention discloses a profile steel numerical control feeding and automatic clamping device for a profile steel machining production line, and belongs to the technical field of profile steel machining production equipment. The numerical control feeding device comprises a feeding channel and a numerical control feeding trolley which is installed on the feeding channel and can move along the feeding channel, a clamp rod and a clamp head are arranged on the numerical control feeding trolley, and the numerical control feeding device is characterized in that a clamp lifting mechanism is arranged on the numerical control feeding trolley, and the clamp rod is horizontally and movably connected with the clamp lifting mechanism through a supporting sliding block mechanism; a clamp rod resistance meeting signal distinguishing mechanism is arranged between the clamp rod and the supporting sliding block mechanism. A profile steel fixing mechanism is arranged on the front portion of the profile steel trough at the tail end of the feeding channel, and a clamp rod guide mechanism is arranged in the profile steel trough at the tail end of the feeding channel. The automatic clamping device can guarantee automatic clamping in the profile steel numerical control feeding process in a profile steel machining production line, full automation of profile steel machining can be achieved, and the production efficiency can be greatly improved.

The invention provides a hole-pitch-adjustable drilling device. The device comprises a supporting frame, a first drilling mechanism, a second drilling mechanism, an oil cylinder and a linkage mechanism, wherein the first drilling mechanism and the second drilling mechanism are arranged on the supporting frame in a sliding way; and the oil cylinder is arranged on the supporting frame, is positioned between the first drilling mechanism and the second drilling mechanism and is used for driving the first drilling mechanism and the second drilling mechanism to slide close to each other or far away from each other on the supporting frame by using the linkage mechanism. In the hole-pitch-adjustable drilling device provided by the invention, the two drilling mechanisms are integrated on the supporting frame, hole pitch can be adjusted through the linkage mechanism, and the operation of two holes can be finished at a time, so that the working efficiency of punching is improved; and the operation can be finished by operating the device only by one operator, so that the device is conveniently and reliably operated, and the problems of mutual interference and avoidance of the two drilling mechanisms are solved.

The invention discloses a high-voltage direct-current relay with auxiliary contacts. The high-voltage direct-current relay is composed of a pushing mechanism, a main moving spring with double main moving contacts, two main leading-out terminals respectively provided with main fixed contacts, an auxiliary moving spring with dual auxiliary moving contacts, two first auxiliary leading-out terminals respectively provided with first auxiliary fixed contacts, and a yoke plate. The pushing mechanism penetrates and sleeves the yoke plate. The main moving spring is installed at the upper end of the pushing mechanism; the auxiliary moving spring is installed on the pushing mechanism between the main moving sprng and the yoke plate; the two first auxiliary leading-out terminals are fixed on the yokeplate by adaptive members with insulation structures to realize mutual insulation with the yoke plate; and the auxiliary moving contacts at the two ends of the auxiliary moving spring correspond to the first auxiliary fixed contacts of the two first auxiliary leading-out terminals on the yoke plate. According to the high-voltage direct-current relay disclosed by the invention, one group of converted auxiliary contact structures is realized, so that the reliability of the high-voltage direct-current relay is improved substantially.

The invention belongs to the technical field of bioengineering, and relates to breeding of industrial microorganisms, in particular to a high-freezing-tolerance accharomyces cerevisiae strain and a construction method thereof. The freezing-tolerance yeast strain is obtained in the mode that in a parent yeast strain, a strong promoter PGK1 is selected for overexpressing a complete sequence of an encoding gene SNF1 of Snf1 protein kinase alpha subunit. Compared with the parent strain, according to the freezing-tolerance accharomyces cerevisiae strain, in a freezing environment, the cell survivalrate and the fermentation capacity of frozen dough are significantly improved, technical obstacles and quality defects in the bread making process are overcome, and the high-freezing-tolerance accharomyces cerevisiae strain has a wide application prospect.

The invention relates to the technical field of mine flood accident emergency rescue, in particular to a mine trackless inclined shaft floating pump type emergency drainage system and a mounting method. A floating pump is suspended in water through a support and a floating boat, is pushed by a hard metal pipeline, a main pump and a matched pipe valve which are sequentially connected behind a water outlet of a floating pump along the gravity component of a slope;, a condition of rolling along the slope is created by a pipe supporting rubber wheel pair, a pump supporting truck and an emergency light rail, traction tension and rope outlet speed are controlled by a mining double-speed winch, a movable pulley block and a steel wire rope, so that the floating pump synchronously descends along with the water level at a low speed, a soft pipeline and a slow closing valve are connected behind a water outlet of the main pump in a matched mode, and a water source is safely conveyed at a long distance. Operation and monitoring of the floating pump and the main pump are guaranteed through power supply and distribution equipment, and voice communication devices are arranged at key points in a serialized mode to assist efficient linkage operation. According to the mine trackless inclined shaft floating pump type emergency drainage system, an integrated matching process technology solution and an optimally matched equipment system for lightweight and rapid construction of the trackless inclined shaft emergency drainage system are formed.

The invention discloses a calculation method and a control method for the coating film strain of an ultra-thin lens, and the ultra-thin lens. The coating film strain calculation method comprises the following steps of: obtaining a relation model between coating film stress and thickness of a film layer material required by an ultra-thin lens, calculating the corresponding coating film stress according to the thickness required by each film layer, and calculating the stress of the coating layer of the ultra-thin lens according to an improved stoneley formula so as to obtain the strain of the coating layer on a substrate. The coating film strain control method comprises the steps of: designing a metal oxide film layer based on the coating film layer stress of an ultra-thin lens, and adding the designed metal oxide film layer into the coating film layer of the ultra-thin lens to control the coating film stress, the vector sum of the coating film stress and the coating film layer stress being smaller than a preset stress threshold. According to the invention, the strain of the ultra-thin lens in the film coating process can be predicted and controlled, and the ultra-thin lens without strain after film coating is obtained.