31results about How to "Conducive to maximizing the use of" patented technology

The invention provides a frequency spectrum sharing method of a cognitive radio system and a management terminal. The frequency spectrum sharing method has the advantages that before a frequency spectrum resource application is sent to a cognitive database, analyzing the frequency spectrum sharing request of each cognitive node in the managed cognitive radio system, acquiring the related information of the cognitive node adjacent to the cognitive radio system by visiting the cognitive database, and performing interference analysis to determine the first available frequency spectrum of each cognitive node in the cognitive radio system; determining the applicable frequency spectrum of each cognitive node in the managed cognitive radio system according to the distributed frequency spectrum of the managed cognitive radio system, the first available frequency spectrum of each cognitive node in the managed cognitive radio system and the corresponding frequency spectrum resource sharing request of each cognitive node. The frequency spectrum sharing method has the advantages that the needs of each cognitive node are satisfied, the availability of frequency spectrum resource distribution is increased greatly, and the distribution efficiency of frequency spectrum sharing is increased.

The invention discloses a vanadium extraction cooling agent, which comprises the following components in percentage by weight: 40-82 percent of vanadium extraction dust removing ash, 12-52 percent of oxide iron scale and 6-8 percent of binding agent. The invention also discloses a preparation method of the vanadium extraction cooling agent. The preparation method comprises the following steps of: proportioning 40-82 percent of vanadium extraction dust removing ash, 12-52 percent of oxide iron scale and 6-8 percent of binding agent by weight; mixing the proportioned materials; adding water while mixing, wherein the mass ratio of the water to the materials is 3:50-5:50; briquetting the uniformly mixed materials; and drying the pressed blocks to obtain the vanadium extraction cooling agent. According to the vanadium extraction cooling agent and the preparation method thereof, the one-time block forming rate of the vanadium extraction cooling agent is over 92 percent, the TFe content reaches over 60 percent, less P, S, water and the like are included, the requirements on use as the vanadium extraction cooling agent are fully met, the dust removing ash produced by the vanadium extraction of a converter can be completely and effectively utilized, the cost is saved, the requirements on vanadium extraction production of the converter can be completely met, and the maximum utilization of a vanadium resource is facilitated.

The invention discloses a method and a device for preparing high-purity tungsten hexachloride. According to the method, tungsten powder, chlorine gas and active carbon are used as raw materials in a mole ratio of 100:(300-600):(1-20), the tungsten powder is added from a side part of a chlorination furnace, part of the chlorine gas is introduced from the bottom of the chlorination furnace, the chlorination temperature is 600-1000 DEG C, gaseous tungsten hexachloride, a small amount of tungsten oxychloride and low-valent tungsten chloride and excess chlorine gas are introduced into a refining furnace, another part of the chlorine gas is also introduced into the refining furnace, the refining furnace is filled with the active carbon, the refining temperature is controlled to be 600-1000 DEG C, the tungsten oxychloride and low-valent tungsten chloride in steam are converted into tungsten hexachloride, the refined tungsten hexachloride steam is introduced into a receiving tower through the upper side of a receiving tower at the other side of the refining furnace, and tungsten hexachloride is extracted out of the bottom of the receiving tower. The method disclosed by the invention is short in flow and less in equipment, is energy-saving and environment-friendly, realizes efficient utilization of resources, achieves integration of roughing and refining of tungsten hexachloride, and has important significances for improvement of a tungsten hexachloride preparation technology.

The present invention provides a method for improving power distribution network relay protection reliability of distributed resources. A data analysis module is implanted in a protection device in advance and comprises capacity value allowed to access DR (Distributed Resources) and logic calculation current value of the protected elements when a relay protection device can perform normal motion when protected elements have the most serious faults; and the relay protection device is configured to receive a capacity value of the DR accessing the power distribution network in real time and compare the capacity value with the capacity value allowed to access the DR to determine a calculation current value which can be employed by the reliable motion of the protection device when the elements have short circuit so as to realize a final reliable motion. The method for improving power distribution network relay protection reliability of the distributed resources facilitates the maximized utilization of the DR, improves the permeability of the DR accessing the power distribution network and reduces the influence on the power distribution network system caused by accessing and the dependence on a traditional generation mode; and in the condition without frequently deblocking and blocking and regulating the capacity of the DR accessing the power distribution network, the problem is solved that the reliability of the relay protection device is reduced because of continuous changing of the capacity of the DR accessing the power distribution network.

The invention discloses an oxygen reduction catalyst, comprising: a hollow nitrogen-doped carbon sphere with a shell; and transition metal nanoparticles embedded in the shell. The oxygen reduction catalyst according to the present invention has a uniform transition metal nanoparticle-nitrogen-doped active center, and a suitable pore size and high specific surface area of ​​the mesoporous channel, which is conducive to the transport of reactants and products during the oxygen reduction process, so its It has efficient oxygen reduction catalytic performance and excellent stability. The present invention also discloses a preparation method of the above-mentioned oxygen reduction catalyst, comprising: dispersing the microsphere template in an alkaline solution to obtain a first mixture; adding a nitrogen-doped carbon source and a transition metal salt to the first mixture, and the obtained The nitrogen-doped carbon source is polymerized to obtain a second mixture; the second mixture is dried and calcined in a protective gas to obtain an oxygen reduction catalyst. The invention also discloses the application of the above-mentioned oxygen reduction catalyst in the cathode of the fuel cell.

The invention discloses a device for clean production of tungsten disulfide. The device comprises a box-type reaction tube and a sulfur recycling tower, wherein the box-type reaction tube is divided into a feeding area, a reaction area, a low-temperature area, a cooling area and a discharging area; a pusher track is arranged in the box-type reaction tube, pushers are arranged on the track, an inert gas inlet is formed in the upper part of the feeding area, a feeding opening is formed in the side part, and the head part of the feeding area is provided with an electric push rod device; a high temperature area is heated and thermally controlled by virtue of a resistance furnace, a gas outlet is formed in the top of the reaction area on the lower end of gas flow, and the reaction area is connected with a sulfur recovering tower by virtue of a resistance wire insulation pipe; one side of a sulfur outlet in the bottom of the low-temperature area is provided with a slope of 5 to 15 degrees, the surface of the slope is coated with tungsten disulfide of 0.05mm to 10mm, a sulfur outlet in the bottom end of the slope is connected with the sulfur recovering tower, and a connection part is thermally insulated by virtue of asbestos; the cooling area is coated with a cooling water layer to lower the temperature. By adopting the device, the sulfur interception can be avoided, continuity in clean production can be realized, no waste gas, waste water and industrial residue is produced, the device is environment-friendly and pollution-free, and the continuous industrialized mass production can be realized.

The invention relates to a method for recycling phenylglycine in cefalexin crystallization mother liquid. The method comprises the steps of pyrolysis, centrifugation, pretreatment, desalination and nano-filtration concentration. The method provided by the invention solves the difficulty that wastewater containing cefalexin cannot be directly treated biochemically, and phenylglycine recovered by the method can be directly applied to subsequent production. According to the method disclosed by the invention, an organic solvent is not used, and the production cost is reduced, so that the method is beneficial for environmental protection and is a green and efficient recovery method.