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 multi-environment modular automatic breeding system, which comprises a base, a feeding part, a purification part and an oxygenation part. The base is provided with more than two connecting grooves in sequence from left to right, and the feeding part, Both the purification part and the oxygenation part are inserted into the connection groove, and the motor is fixed at the leftmost end of the base. The operation of feeding parts, purification parts and oxygenation parts is driven by a single motor, which saves resources. At the same time, each part of the system adopts a modular setting, and each module can be increased or decreased according to the actual situation, which is conducive to the maximum use of resources. utilization. Each module can realize automatic feeding, water cleaning and oxygenation through the drive of the motor, which greatly improves the efficiency of breeding operations and reduces labor costs.

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 cleaning process for preparing tungsten disulfide in a closed-circuit cycle. The molar ratio of tungsten, sulfur and tungsten disulfide is 1000: (2000-6000): (1-50); It is sent into a segmented box-type reaction tube under an inert atmosphere, and is kept at 230-850 °C for 1-24 hours in the high-temperature zone of the reaction tube. A sulfur recovery device is added in the air-cooled low-temperature zone of the reaction tube to realize sulfur recovery and reuse, and the water cooling effect in the cooling zone is reduced to Tungsten disulfide was obtained at room temperature. A tungsten disulfide vacuum device is connected to the side wall of the low temperature zone of the reaction tube, and tungsten disulfide is added to make the sulfur solution contain 0.05% to 10% of tungsten disulfide. The process of the invention is closed-circuit circulation and the sulfur is completely used, which solves the problem that SO is common in the traditional tungsten disulfide production process. X , H 2 S, NH 3 It has the advantages of simple process, low cost, cleanliness and environmental protection due to the problems of toxic gas emissions polluting the environment, low sulfur utilization rate, and high external energy.

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.

A longline fishing system ship layout structure and operation method thereof, including a survey ship, an open-air work area is provided at the tail of the main deck of the survey ship, a superstructure is provided at the middle and front part of the main deck, and the rear of the superstructure is A rear end wall is arranged at the end of the ship, and the rear end wall is located behind the middle of the ship; a longline fishing system is installed in the open-air work area, and the structure of the longline fishing system is: including a rope throwing machine and a rope taking machine arranged at intervals, A three-way guide wheel is arranged on one side of the rope machine, and multiple dry rope winding guides and multiple one-way guide wheels are arranged on the route between the rope take-up machine and the throwing machine and between the rope take-up machine and the three-way guide wheels. On the route, both routes pass through the dry rope; the open-air operation area is also equipped with a dynamic positioning system control station, which is comprehensively arranged and has a high utilization rate, and is suitable for medium and large fishery resource survey ships over 50 meters in length.

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 high-intensity large-specific heat multiphase magnetic cold accumulation material and a preparation method thereof. The material consists of at least two phases or more than two phases; sample preparation is carried out according to an ASTM E9-09 standard; a compression test is carried out; the compression intensity is large than 200 MPa; within the temperature range of 2K-10K, the unit volume specific heat value and the heat capacity value of the material are both larger than the unit volume specific heat value and the heat capacity value of Pb; and within the temperature range of 10K-40K, the unit volume specific heat value and the heat capacity value of the material are respectively 83% larger than the unit volume specific heat value and the heat capacity value of Pb. A low-purify metal or a recovered material is used as a raw material; a deoxygenization technology is utilized to obtain the high-intensity large-specific heat multiphase magnetic cold accumulation material with a lower oxygen content than the oxygen content of the raw material; from 4K to 40 K, a large specific heat is presented, so that the material can replace Pb for use; the material is prepared by using the raw material with a high oxygen content; the material requirement is reduced; the preparation cost is saved; and the price competitive capacity is improved.

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.