30results about How to "Reduce the intensity of action" patented technology

The invention discloses a method for controlling a laneway floor heave through deep-hole section blasting. The method comprises the following steps of: boring a combined blast hole incline and below two edges of a laneway and a base plate under strong support, and filling explosive to blast in a special section of the deep part of the blast hole to realize that the stresses of the special sections of the laneway edges and the base plate are transmitted to the deep parts of surrounding rocks. The invention has the beneficial effects that: a rock layer of the base plate of the laneway at the position is arranged under a stress environment with a lower level and the total deformation amount of the base plate is reduced by blasting and decompressing the special sections of the deep parts of the laneway edges and the base plate; simultaneously, the special sections are arranged in the deep parts of the surrounding rocks, thus the influence of the blasting on the completeness and the bearing capability of a surrounding rock structure in a shallow part is smaller, and the surrounding rock structure in the shallow part can still effectively prevent the deformation of the surrounding rocksin the deep parts. According to the method disclosed by the invention, the surrounding rocks in the deep part of the laneway are blasted, the surrounding rocks in the shallow parts are reinforced andare protected in completeness, both of aspects are organically combined, thus the amount of the laneway floor heaves is controlled. The method of the invention is simple and convenient to construct, is easy to handle, and has better control effect on the floor heaves and wide application prospect.

The invention provides a glass raw material composition. The glass raw material composition comprises, by weight, 35 to 60 parts of Bi2O3, 10 to 30 parts of B2O3, 10 to 20 parts of SiO2, 1 to 5 parts of CaO, 0.5 to 5 parts of MgO, 0 to 5 parts of Al2O3, 3 to 8 parts of Sb2O3 and Sb2O5, and a nitrate of which the content is 0.5 to 1.5 times the content of Sb2O3, wherein the nitrate is magnesium nitrate or calcium nitrate. The invention also provides inorganic glass powder prepared from the glass raw material composition, crystalline silicon solar battery aluminum conductive paste prepared from the inorganic glass powder, and a preparation method of the crystalline silicon solar battery aluminum conductive paste. The clear inorganic glass powder can be prepared from the glass raw material composition and thus a battery piece prepared from the crystalline silicon solar battery aluminum conductive paste containing the inorganic glass powder has high photoelectric conversion efficiency and high water boiling resistance.

The invention discloses a single longitudinal axial flow rigid-flexible coupled corn threshing device, which comprises a frame and a columnar threshing drum supported on the frame rotatably at both ends; A rigid-flexible coupling threshing unit on the edge; a hollow cylindrical concave plate screen coaxially sleeved on the outside of the threshing drum, the concave plate screen includes: a plurality of support bars extending at intervals in a spiral shape, fixed on the The first baffles on both sides of the support bar, and the lower ends are embedded into the concave plate threshing bars in the accommodating space. The present invention further reduces the broken rate of corn kernels through the threshing effect of rigid-flexible coupling, and improves the threshing rate by increasing the threshing strength.

The invention relates to an electronically controlled solid propellant and a preparation method thereof, belonging to the field of solid propellants. The electronically controlled solid propellant includes the following raw materials in mass percent: 10% to 14% of a hydroxyl-containing binder, 80% to 85% of a main oxidant, 1% to 4% of a secondary oxidant, and 0.5% to 0.5% of a crosslinking agent 2%, functional additive 1% to 2.5%; wherein, the main oxidant is an aqueous solution of hydroxylamine nitrate with a mass concentration of 5% to 10%, and the crosslinking agent is one of a silicon-containing compound or an organic titanium chelate or a combination. The invention can avoid a lot of gel groups and air bubbles in the slurry, and significantly improve the uniformity of the electronically controlled solid propellant.

The invention discloses a digital image encryption method. The digital image encryption method can be widely applied in engineering design, and the application of a Bezier method in image processing is a practical operation. The modification method is based on a digital image encryption algorithm of a rational quadratic Bezier curve. The system retains the simple form of a one-dimensional chaoticsystem. Since three weight factors and an initial x value are used as the initial values, all key spaces are large. In addition, the encryption and decryption of the system are low in complexity and high in efficiency. By simulation tests, the gray histogram of an image encrypted by the algorithm is relatively uniform, the correlation strength and the like between adjacent pixels in the encryptedimage are significantly lower than those of the conventional encryption algorithm, and a good encryption effect is achieved.

A backpack type small berry picking machine comprises a back frame, a miniature gasoline engine, a centrifugal type clutch, a steel wire flexible shaft, a secondary gear drive mechanism, an eccentric vibration mechanism, a housing, a front annular handle, a rear handle, and branch vibrators; the miniature gasoline engine is arranged on the back frame through a vibration isolation rubber pad; an output shaft of the miniature gasoline engine is connected with an input end of the steel wire flexible shaft through the centrifugal type clutch; a square joint of the output end of the steel wire flexible shaft is connected with a square interface of an axle drive bevel pinion of the secondary gear drive mechanism; the eccentric vibration mechanism comprises an upper crank, a lower crank, an eccentric adjustable camshaft, a dual-face guide rail, an upper reciprocating oscillating lever and a lower reciprocating oscillating lever; the branch vibrators are respectively fixed on the front ends of the upper and lower reciprocating oscillating levers; the front portion and rear portion of the housing are respectively provided with a front annular handle and a rear handle; the rear handle is provided with a speed regulator; the speed can be regulated so as to allow the small berry branches to generate different frequency vibrations, and the vibration force can separate the small berries from the branches.

The invention relates to an etoposide implant, and a preparation method, purpose and an application method thereof. The implant is a circular column with diameter of 0.2-1.2 mm and length of 1-5 mm; and the implant is prepared from etoposide, polylactic acid and polyethylene glycol through compacting. It takes the implant 6-120 days to release 90% of the medicine in human body; and the implant can be implanted into a tumor focus through medicine implant needle percutaneous puncture or surgery, or implanted into positions requiring long-time etoposide medication treatment for regional continuous long-time medicament treatment.

The invention provides a honeycomb sandwich explosion-proof wallboard, which includes a first steel plate layer, a honeycomb composite layer, a second steel plate layer and a first connecting part, and the honeycomb composite layer is arranged between the first steel plate layer and the second steel plate layer In between, the first connecting part passes through the first steel plate layer, the honeycomb composite layer and the second steel plate layer to connect the three layers into one; The peaks of the adjacent two layers of pressed steel plates in the lower layer are staggered, and the tooth peaks of the upper layer and the tooth valleys of the adjacent lower layer are combined to form a hexagonal unit in cross section, and a hexagonal honeycomb structure is formed by several hexagonal units. , resist blast loads through the ability of the honeycomb composite layer to deform and absorb energy. The honeycomb composite layer of the present invention is a hollow honeycomb structure made of multi-layer pressed steel plates, which achieves the purpose of occupying less space and lighter weight than wall panels with the same explosion-proof performance, thereby reducing the additional cost of the building. burden and reduce construction costs.

The invention discloses an axial-flow rigid-flexible coupling profiling corn threshing device, which comprises: an upper casing, on which guide vanes are arranged; and a concave plate screen, which is connected with the upper casing to form a cylinder type hollow structure, the inner wall of which is provided with elastic threshing units; Shaped threshing unit; wherein, the elastic threshing unit and the rigid-flexible coupling profiling threshing unit are in a meshing shape relative to the ear of corn. The axial-flow rigid-flexible coupling profiling corn threshing device described in the present invention can reduce the breakage rate of grains and improve the threshing rate by arranging elastic threshing units on the concave plate sieve and rigid-flexible coupling profiling threshing units on the threshing drum. Rate.

The invention discloses a driving motor speed regulator optimization method used in electric vehicle AMT gear changing. Cooperative work of a speed ring controller and an acceleration sensor is adopted in a speed ring PI regulator; an acceleration value a in current driving of a vehicle is obtained through the acceleration sensor; next, comparison between the acceleration value a output by the acceleration sensor and a preset acceleration threshold value K is performed; when the acceleration value a is less than or equal to the acceleration threshold value K, the output of the speed ring PI regulator is not adjusted, equivalently, the proportional element of the speed ring is output as normal; and when the acceleration value a is greater than the acceleration threshold value K, the proportional element output value is subjected to amplitude limiting by the integral element output value of the speed ring. By virtue of the driving motor speed regulator optimization method, the acting intensity of the proportional element can be lowered according to the current acceleration condition in vehicle gear changing, so that overshoot of a rotary speed ring is suppressed effectively, and a quick, accurate and smooth gear changing experience can be realized.

The invention provides a shale gas horizontal well operation device based on pressure oscillation. A pump truck and an instrument truck are connected to a Christmas tree through high-pressure pipelines and connected through a data line; a sand mixing truck and an acid tank truck are connected to the pump truck through high-pressure pipelines; the pump truck is further connected with an oscillationsystem through a high-pressure pipeline; the oscillation system comprises a signal generator, a servo mechanism and a plunger pump and is connected with a pressure sensor through a data line; the pressure sensor is connected to the Christmas tree through a high-pressure pipeline; and the oscillation system further comprises a high-pressure sealing valve connected to the plunger pump. Through theshale gas horizontal well operation device, a target reservoir can generate a plurality of fan-rib-shaped main cracks, and furcal small cracks with the large extending lengths are generated on the main cracks; and the instantaneous extending lengths of the main cracks can be further decreased, and accordingly the situation that a water layer is penetrated in a pressed mode is avoided.