31results about How to "Improve transport performance" patented technology

A duplex image reading apparatus has a transportation path for transporting a sheet original to a reading region by an original transporting device, and first and second reading devices placed corresponding to respective transportation sides of the sheet original in the reading region of the transportation path, and is constructed in such structure that each of the first and second reading devices is of such a configuration that a color reference portion used as a color reference for reading is opposed to a reading portion while the color reference portion and the reading portion are placed on two sides with the transportation sides of the sheet original in between, wherein the first and second reading devices are arranged so that either one of the reading portion and the color reference portion is supported so as to be movable in a direction substantially perpendicular to an image reading surface of the reading portion.

The invention provides a tapered guide cylinder. A supporting frame and a motor connection plate are fixed to a base. A fixed sleeve is fixedly connected with the base through the supporting frame. A fixed sleeve is sleeved with a rotary sleeve, a toothed arc is arranged on the rotary sleeve, and a motor is arranged on the motor connection plate. The output end of the motor is connected with a gear which is meshed with the toothed arc, six tapered skewed grooves are evenly formed in the rotary sleeve, and six round holes corresponding to the six tapered skewed grooves are formed in the fixed sleeve. Each tapered unit comprises a tapered skewed block and a tapered arc plate which are connected mutually. The number of the tapered units is six. Each tapered skewed block penetrates through the corresponding tapered skewed groove and the corresponding round hole. The tapered arc plates are located in the fixed sleeve and form a cylinder structure. Each tapered skewed block is provided with an arc plate reset spring. The rotary sleeve is provided with a fixed spring connection plate. A rotary sleeve reset spring is arranged between each spring connection plate and the supporting frame. The tapered guide cylinder is particularly suitable for guide transportation of cylindrical objects of different radiuses.

The invention discloses a preparation method of a fluorescence solar light collector based on carbon quantum dots. The preparation method is characterized by comprising the following steps: (1) preparing carbon quantum dots in different sizes through a hydrothermal decomposition method; (2) dissolving carbon quantum dots and photoinitiator into a mixed solution formed by mixing methyl propane acidglycerol trilaurate and dimethyl acrylic ethylene glycol diacrylate, ultrasonically treating the mixed solution for 3-5min, oscillating for 1-3min on a vortex mixer in a mixed way, placing in a vacuum environment to drying for 2-4h, heating for 20-40min at constant temperature of 50-70 DEG C at water bath, and then pouring the mixed solution into a self-made glass mold, exhausting air for 2-4h ina vacuum drying oven, curing by adopting a water bath heating method or the irradiation of an ultraviolet lamp, and cutting and polishing after curing and demolding. The preparation method has the advantages that the reabsorption loss can be effectively reduced, the device light collecting efficiency is greatly improved, the cost is low, the biological compatibility is good, and the light stability of the device is good.

The invention provides a tapered guide cylinder. A supporting frame and a motor connection plate are fixed to a base. A fixed sleeve is fixedly connected with the base through the supporting frame. A fixed sleeve is sleeved with a rotary sleeve, a toothed arc is arranged on the rotary sleeve, and a motor is arranged on the motor connection plate. The output end of the motor is connected with a gear which is meshed with the toothed arc, six tapered skewed grooves are evenly formed in the rotary sleeve, and six round holes corresponding to the six tapered skewed grooves are formed in the fixed sleeve. Each tapered unit comprises a tapered skewed block and a tapered arc plate which are connected mutually. The number of the tapered units is six. Each tapered skewed block penetrates through the corresponding tapered skewed groove and the corresponding round hole. The tapered arc plates are located in the fixed sleeve and form a cylinder structure. Each tapered skewed block is provided with an arc plate reset spring. The rotary sleeve is provided with a fixed spring connection plate. A rotary sleeve reset spring is arranged between each spring connection plate and the supporting frame. The tapered guide cylinder is particularly suitable for guide transportation of cylindrical objects of different radiuses.

A antimonide superlattice VLWIR detector with a dark current suppression structure to suppress device dark current and improve photogenerated carrier transport. Including the following structure: substrate; buffer layer, epitaxial on the substrate; middle and long wave band contact layer, called P region, epitaxial on the buffer layer; very long wave band absorbing layer, called π region, The epitaxial is above the P region of the medium and long wave band contact layer; the medium and long wave band barrier layer is called the M region, and is epitaxially above the π region of the very long wave band absorbing layer; the medium and long wave band contact layer is called the N region , epitaxial on the M region of the medium and long wave band barrier layer; the capping layer is epitaxial on the N region of the medium and long wave band contact layer; adjusting and controlling the superlattice structure of each region, the doping of the absorbing layer and the barrier layer The complex mode and thickness are used to design the energy band structure of the infrared detector device. The structure is based on the PπMN structure, and a new barrier structure design is proposed involving superlattice, thickness and doping.

The invention discloses a flower-like multilevel structure zinc oxide support framework, and a preparation method and application thereof. The support framework is a multilevel structure zinc oxide material which grows on a conducting substrate material in situ. The shape of the multilevel structure zinc oxide material is a flower-like multilevel structure composed of a dendriform zinc oxide nano linear array. The dendriform zinc oxide nano linear array is a monocrystalline zinc oxide nano linear array material with a wurtzite crystalline phase structure, which grows in different growth directions accroding to the [001] crystal orientation. The support framework can be used for preparing a composite silicon-base lithium battery negative pole material; and the composite silicon-base lithium battery negative pole material is composed of the support framework, and a metal nickel layer and an amorphous silicon layer which are sequentially coated on the support framework. The flower-like multilevel structure zinc oxide support framework disclosed by the invention has large specific area and has favorable structural stability under multiplied charging / discharging working conditions. The composite silicon-base lithium battery negative pole material prepared from the flower-like multilevel structure zinc oxide support framework has favorable multiplied charging / discharging properties.

The invention discloses a growth method for a high-quality Cu2Se(1-x)Ax crystal. The method comprises the following steps: (1) preparing raw materials, namely weighing a certain amount of Cu2Se powder, adding TeCl4, TeBr4 or I2 powder as a transportation agent and a doping agent, grinding and mixing uniformly by a mortar, adding the raw materials into a clean high-temperature-resistant quartz tube, and sealing by gas flames in a vacuum state for later use; (2) crystal growth, namely adding the quartz tube sealed in the step (1) into a two-temperature-zone or multi-temperature-zone tube furnace, and setting a growth temperature, thereby obtaining the Cu2Se(1-x)Ax crystal by virtue of growth in a certain cycle, wherein A is Cl, Br or I. The growth method for the Cu2Se(1-x)Ax crystal providedby the invention has the advantages of being simple in growth equipment, low in cost, high in quality of the grown crystal, large in size and the like.

The invention relates to a drum-type residual film conveying device, comprising a supporting mechanism and a film conveying roller supported by the supporting mechanism, the film conveying roller can rotate along its own central axis, the film conveying roller includes a roller, and the roller of the roller A plurality of film delivery blades are evenly distributed along the circumferential direction of the outer circle, and the extension direction of each film delivery blade is parallel to the axis direction of the drum. Empty grooves are sequentially arranged in the film delivery blades along the axis direction of the drum so that the film delivery blades It is a zigzag structure; the film-transferring blades include first film-transferring blades and second film-transferring blades arranged in a staggered manner, and the two sides of each first film-transferring blade are second film-transferring blades. The empty slots in the second film delivery blades are arranged in a staggered manner, so as to be suitable for the structure in which the openings of adjacent columns of pick-up teeth are arranged in a staggered manner in the eccentric pick-up roller.

The invention discloses a method for improving the high-temperature friction performance of tungsten-rhenium alloy. The method comprises: 1. Weigh W powder, Re powder and HfC powder respectively according to the target product tungsten-rhenium alloy, and mix them by high-energy ball milling under the protection of inert gas. Alloy powder; 2. Seal the mixed alloy powder and press it to obtain a billet, and then place it in a hydrogen furnace for sintering to obtain a sintered billet; 3. Put the sintered billet into a sheath for sealing welding, and then perform hot isostatic pressing to remove the sheath Then get tungsten-rhenium alloy. The present invention combines high-energy ball milling, cold isostatic pressing, hydrogen sintering and hot isostatic pressing to prepare tungsten-rhenium alloys, effectively removes impurities in raw materials, avoids the formation of softened phases, improves the density of tungsten-rhenium alloys, and avoids the occurrence of HfC agglomeration Porous, give full play to the multi-dimensional strengthening effect of HfC, greatly improve the strength and hardness of tungsten-rhenium alloy, thereby improving the high-temperature friction performance of tungsten-rhenium alloy, prolonging its service life, and reducing the occurrence of engineering accidents.

The invention relates to a non-noble metal catalyst used for catalytic oxygen reduction and a preparation method thereof. The catalyst has the general formula of Me-N-C. By means of adsorption capability and range-limited calcination of the active carbon, non-noble metal atoms, Me and N which are dispersed to the atomic scale, are adsorbed and limited in the pores in the active carbon C, so that on the basis of high-electro-conductivity of the active carbon, a high-effective oxygen reduction catalyst having single-atom-dispersing capability can be obtained. The non-noble metal catalyst is lowin metal content, can be prepared at low cost and has very large specific surface area, wherein the Me and N are distributed in interior of pores in the active carbon, in a mono-atom dipsersed manner,instead of on the surface of the active carbon, so that excellent mass transfer capability and conductivity are achieved. The catalyst has excellent oxygen reduction catalytic activity, can be applied to preparation of MEA membrane electrodes and cathode catalytic reaction process of large-scale Zn-air batteries, Al-air batteries and fuel cell stacks. The invention provides the high-effective andstable catalyst for the MEA membrane electrode.