31results about How to "Improved technical indicators" patented technology

The invention discloses a method for preparing mixed regenerated polyester fibers special for a non-woven material. The method comprises the following steps of: mixing spinning raw materials such as bottle flakes, a chemical fiber friction material, a bubble material and a fluorescent brightener, drying by using a vacuum drum dryer, and performing melt spinning to obtain as-spun fibers with two or more kinds of fineness through two or more spinning box bodies of melt spinning equipment; winding, doffing and bundling the as-spun fibers in turn; drawing in an oil bath, drawing in steam, and reeling; and performing heat setting to prepare the mixed regenerated polyester fibers special for the non-woven material. Compared with the prior art, the method has the advantages that: the fibers produced by the method have two or more kinds of fineness, the raw materials are stably proportioned and uniformly mixed, the non-woven material can have good opening and mixing effects, and the technical index of the non-woven material can be effectively improved. The mixed fibers can be used for producing different styles of non-woven materials, work efficiency is improved, and production cost is reduced.

The invention relates to an optical fiber quantum key distribution system and a control method thereof. The system comprises a transmitting end, a channel and a receiving end, which are sequentially connected, the transmitting end comprises a serial/parallel conversion unit, a quantum key distribution transmitting unit group and a transmission controller, the channel comprises an optical cable andan auxiliary communication channel, the receiving end comprises an quantum key distribution receiving unit group, a buffer, a parallel/serial conversion unit and a receiving controller, which are connected with each other; and the parallel work of N quantum key distribution transmitting units having the same performance, transmission media, quantum key distribution receiving units are controlledby the corresponding controllers, thereby overcoming the limitation problems of technical and cost factors, stably improving the output rate of secure keys of the optical fiber quantum key distribution system without reducing the non-relay transmission distance, and improving the technical performance and practicability of quantum cryptography communication.

Circular recess waveguide cavity steady oscillator is suitable for microwave, millimeter wave and submillimetre wave. In the circular recess waveguide cavity steady oscillator, an upper insulating bar and a lower insulating bar are fit on inside of front metal plate and rear metal plate to separate them separately, wedging shape matched dry loads are fit on inside of upper and lower insulating bars separately, a circular through-hole with diameter D along length direction of the plates at symmetrical center of end surface of two metal plates to form circular recess waveguid; a transistor base, a coaxial low pass filter and tuning screw are fit in space between two metal plates, the transistor base and coaxial low pass filter are in a same axis, the tuning screw and coaxial low pass filter are parallel, a high Q cylinder adjustable resonant cavity is fit on one end of circular recess waveguide, the axis of the cavity and the circular through hole are vertical.

The invention relates to a frequency agility synthesis method compatible with microwave large band width and mid-frequency small step and a device thereof. The invention is characterized in that direct simulation type frequency synthesis, direct digital frequency synthesis, and DSP(digital signal processor) technology are combined to perform frequency synthesis, so as to make the best of the advantages of the mentioned technologies, avoid technical defects, realize the optimization of all technical indexes of the frequency synthesizer, has a better expandability on the design of frequency band width and at the same time is compatible with large band width microwave frequency agility and mid-frequency small stepping frequency agility signal functions.

Under stable supply, coal gas is fired to burn materiel on lead sinter machine. Through gas pipe, coal gas generated from gas generator is entered to cyclone dust collector. Through gas pipe, dust removed coal gas is entered to branch pipe. Through air pipe, comburant air enters into branch pipe. After branch pipe for coal gas and branch pipe for comburant air are connected to each other, and led to burner, where gas and air are mixed fully in volume ration being about 1:1. Through the burner, mixed gas burns in firebox of ignition furnace. Advantages are: lowering cost by using gas to replace heavy oil, better controlling fire behavior, and good effect for baking materiel.

The invention relates to reduction smelting slag and application of the reduction smelting slag to reduction smelting of coarse antimony oxide, and belongs to the field of nonferrous metallurgy. The designed reduction smelting slag comprises, by mass, 20-40 parts of SiO2, 20-40 parts of FeO, 5-20 parts of CaO and 5-25 parts of Na2O. During reduction smelting of the coarse antimony oxide, the set reduction smelting slag is supplemented, the temperature ranging from 900 DEG C to 1,200 DEG C is kept for 30-120 min, coarse antimony, glass slag, smoke and flue gas can be generated, the coarse antimony and the slag are independently discharged after settling separation, the smoke is subjected to powder returning treatment, and the flue gas is exhausted after being purified. The design technology has the beneficial effects that the smelting temperature is low, the antimony content of the slag is small, the antimony direct recovery rate is high, and the powder returning amount is small; and large-scale industrial application is facilitated.

The invention relates to lead blast furnace oxygen enrichment smelting technology that adding oxygen into air supplied to blast furnace by blower fan to improve the oxygen concentration to 20-30%. Thus, the reducing atmosphere of the furnace is improved and the processing quantity is increased. The technology index is sharply increased, and the social and economic benefits are notable.

The invention discloses a magnetic tuning filter with a magnetic circuit air gap field fine tuning structure and a debugging method, the filter comprises an upper magnetic circuit, a lower magnetic circuit, a working air gap and a resonant circuit, the resonant circuit comprises a plurality of coupled small resonant balls, one side of each small resonant ball is provided with a ball adjusting rod, and when the number of the small resonant balls is three, the upper magnetic circuit corresponds to the interstage small ball, and the lower magnetic circuit corresponds to the interstage small ball. When the number of the small resonance balls is larger than three, the positions, corresponding to the small input and output balls, of the upper magnetic circuit are each vertically provided with a through screw hole, and a fine adjustment screw is arranged in each through screw hole. According to the invention, the debugging mode is simple, the local magnetic field of the individual small ball is adjusted through the fine tuning screw, and the fixed frequency difference of the individual small ball is adjusted by combining the small ball adjusting rod, so that the frequency of the harmonic oscillator and the frequencies of other harmonic oscillators coincide in a wide frequency range. The problems of filter response waveform deformation and index deterioration caused by frequency asynchronism of the small resonant balls during broadband tuning are solved, and the production efficiency is improved.

The invention relates to an improved method for producing aluminium oxide by medium-low-grade bauxite, which is characterized in that the production process comprises two-time dissolution processes, i.e. (1) dealuminizing slag is added into the bauxite for carrying out Bayer-process dissolution, and carrying out Bayer-process production of the aluminium oxide; and (2) adding Bayer-process dissolved red mud obtained in the step (1) into alkali liquor, carrying out wet-process dissolution treatment, recovering alkali and aluminium oxide in the Bayer-process red mud. In the method disclosed by the invention, the process of the Bayer process mainly recovers the aluminium oxide in the bauxite, and a wet-process red mud treatment system mainly recovers alkali in the Bayer-process red mud. Dissolved liquor obtained in the Bayer-process part is diluted and purified to remove seed crystal for decomposition, lime is added into the dissolved liquor by wet-process treatment of the Bayer-process red mud to dealuminize, the obtained high-molecular-proportion dealuminized mother liquor is then used for dissolving the Bayer-process red mud, solid-phase dealuminizing slag replacing the lime is added into a Bayer-process system. In the method disclosed by the invention, the process is simple, the energy consumption is low, alkali consumption is low, the recovery ratio of the aluminium oxide is high, the method is suitable for treating the medium-low-grade bauxite mainly in China, the resource utilization ratio is high, the discharged red mud amount is less, and the red mud is easy to be utilized comprehensively.

The invention relates to a microgrid group multi-stage optimization planning method considering load uncertainty, and the method comprises the steps: constructing a two-stage robust optimization double-layer mathematical model, wherein the upper layer of the two-stage robust optimization double-layer mathematical model is a cost model of a power distribution network, and the lower layer of the two-stage robust optimization double-layer mathematical model is a cost model of a microgrid group; carrying out power interaction between the upper layer and the lower layer through PCC points to form coupling of the double-layer model; when the two-stage robust optimization double-layer mathematical model is solved, carrying out KKT equilibrium constraint on constraint conditions of the cost model of the microgrid group, and then linearizing the constraint conditions by using a large M method; and finally, solving the two-stage robust optimization double-layer mathematical model by adopting a column constraint generation decoupling algorithm. Compared with the prior art, the optimal planning construction scheme can be provided for the micro-grid group, the income equalization of a plurality of benefit subjects is realized, the utilization rate of renewable energy sources is improved, the technical indexes of the power distribution network are improved, and the coordinated development of the power distribution network and the micro-grid is effectively realized.

The invention provides an adjusting device for transverse movement of the positions of holes of a titling type oil cylinder and belongs to the technical field of auxiliary equipment for railways. The adjusting device comprises a lifting and returning oil cylinder arranged obliquely, wherein a bearing bottom plate is arranged under the lifting and returning oil cylinder; two hole brackets are longitudinally welded on the bearing bottom plate; a plurality of rotary shaft holes are symmetrically formed in the hole brackets and are forwards opened; an obliquely-upward small-slope oblique plane is arranged between every two adjacent rotary shaft holes; a rotary shaft penetrates through the bottom part of the lifting and returning cylinder; the two ends of the rotary shaft are respectively provided with a roller; the rollers are arranged in the rotary shaft holes; and when the position of the lifting and returning oil cylinder is adjusted, the rollers can roll easily into next rotary shaft hole from the oblique plane. The adjusting device provided by the invention has the advantages that the appearance and the structure are simple; the surface of the bearing bottom plate does not need to be cut by a machine tool; the requirement for the whole processing accuracy is reduced; the working conditions of supporting points are not interfered by the external environment; the adjustment for position movement of the lifting and returning oil cylinder is stable and reliable; and numerous problems in the existing device are solved.