88results about How to "Reasonable cost control" patented technology

The invention relates to the technical field of coating materials, and provides a carbon nanotube ultra-black coating and a preparation method thereof. The preparation method of the carbon nanotube ultra-black coating provided by the invention comprises the following steps: dispersing carbon black in a first dispersion liquid containing a first dispersing agent, an organic auxiliary agent and deionized water to obtain a first mixed system, and mechanically grinding the first mixed system to obtain a carbon black dispersion liquid, wherein the first dispersing agent is aqueous dispersion resin,preparing a second dispersion liquid mixed with a second dispersant and deionized water, dispersing carbon nanotubes in the second dispersion liquid to obtain a second mixed system, grinding the second mixed system, adding deionized water for dilution to obtain a carbon nanotube dispersion liquid, and carrying out mixing treatment on the carbon black dispersion liquid and the carbon nanotube dispersion liquid to obtain the ultra-black coating. Compared with an ultra-black coating singly taking carbon black as a pigment, the reflectivity of the carbon nanotube ultra-black coating provided by the invention is reduced.

The invention discloses an auxiliary rolling method of a magnesium alloy plate, comprising the following step: side-surface predeformation in which rolling pretreatment is carried out on the side surfaces of a magnesium alloy hot-rolling plate blank by a side-surface predeformation technique along the transverse direction or the rolling direction of the plate blank. The plate blank adopts the side-surface predeformation, the texture of the base surface of the material is weakened, the single-pass rolling deformation amount is obviously improved in the processing of subsequent rolling, the rolling molding performance of the plate blank is improved, the rolling pass and the intermediate annealing times are reduced, the processing cost of the magnesium alloy thin plate is obviously reduced, and the reasonable control of the quality and the cost of the magnesium alloy thin plate is realized. Simultaneously, the magnesium alloy plate prepared by adopting the technique has uniform and fine grain structures and excellent mechanical performance. The invention also discloses a rolling method of the magnesium alloy plate, comprising the steps: side-surface predeformation and flat-rolling molding, in the side-surface predeformation, predeformation treatment is carried out on a magnesium alloy hot-rolling plate blank from two sides; and in the flat-rolling molding, flat-rolling molding is carried out on semi-finished products of the plate blank in the range from room temperature to 400 DEG C, so as to manufacture the magnesium alloy plate.

The invention discloses a side slope shallow drainage system. The bottom platform of the side slope (6) is provided with drainage ditches (4), and multiple rows and rows of drainage boreholes are densely arranged on the side slope (6). (1), the distance between the drainage boreholes (1) is 2-3m, the depth is 3-4m, and the elevation angle is 0-10°, each of the drainage boreholes (1) is provided with Drainage pipe, the slope of the slope (6) is arranged with a longitudinal micro-drainage ditch (2) and/or a transverse micro-drainage ditch (3) docked with the outlet of each of the drainage pipes, the The longitudinal miniature water collection ditch (2) and/or the horizontal miniature water collection ditches (3) communicate with the drainage ditch (4). The invention is a side slope shallow layer drainage system for quickly and efficiently discharging the groundwater infiltrated by rainfall into the shallow layer soil of the side slope.

The invention relates to a cold-resistant flame-retardant PVC cable material containing the following components in parts by weight: 100 parts of PVC resin, 33-40 parts of DOP, 12-8 parts of DOTP, 3-5 parts of epoxidized soybean oil, 1-30 parts of vinyl acetate, 30-50 parts of inorganic filler, 4-6 parts of antimony trioxide, 0.1-0.2 part of polyethylene wax, 0.1-0.2 part of stearic acid and 2-5 parts of calcium and zinc composite stabilizer. The cold-resistant flame-retardant PVC cable material provided by the invention has more excellent flame retardant property, so that a cable is prevented from becoming a fire spreading source in a fire; the cold-resistant flame-retardant PVC cable material is remarkable in cold resistance, so that the cable can bear a colder environment; the parts of the used cold-resistant plasticizer and flame retardant are remarkably reduced, so that the formula cost is controlled more reasonably.

The invention discloses a rice straw composite vegetation substrate module used for desertification land treatment. The module sequentially comprises an upper non-woven cloth lining mesh layer, an upper straw fiber layer, a dry and compressed composite plant growth substrate layer, a lower straw fiber layer and a lower non-woven cloth lining mesh layer. The straw composite substrate can provide a relatively good water and fertilizer microhabitat for plant growth on desertification land, the plant survival rate is higher, growth speed is higher, the survival time is longer, and the vegetation ecological restoration efficiency is improved. The rice straw composite substrate module is used, substrate modules can be freely combined and spliced according to geological characteristics and demands in a tile adhering mode, and installation is very convenient. The straw substrate module is convenient to transport and store.

The invention relates to a bill of quantities (BOQ)-based tendering and bidding management control system and a control method thereof for the technical renovation overhaul project of a power grid. Compared with the prior art, the defect that no BOQ-based centralized treatment is available for tendering and bidding data in the prior art can be solved. The method comprises the steps of drawing up abidding plan and obtaining a BOQ; downloading a bidding document; checking a bidding list; generating an evaluation standard and a method template. According to the invention, the content of the BOQis automatically converted into a controlled bidding price file, and the project cost can be reasonably controlled. Meanwhile, the rapid bidding clearing and evaluating of tendering and bidding projects for the technical renovation overhaul project of the power grid can be realized at the same time. The working efficiency and the working accuracy of the tendering and bidding management are improved.

The invention discloses a compound rice straw substrate for promoting phytoremediation on cadmium polluted soil and a preparation method and application thereof. The compound rice straw substrate comprises an upper substrate layer and a lower substrate layer, wherein the upper substrate layer is prepared from 55-65 parts of composted rice straw substrate particles, 10-20 parts of rice straw long fiber, 5-10 parts of composted animal waste, 5-10 parts of nitrogen phosphorus and potassium compound fertilizer, 0.5-1 part of plant rhizosphere fertilizer and 1-3 parts of biodegradable polymer adhesion agent, and the lower substrate layer is prepared from 85-95 parts of composted rice straw substrate particles, 3-5 parts release agent coated soil chelating agent, 0.5-1 part of soil yeast powder and 1-3 parts of biodegradable polymer adhesion agent. The survival rate of the plants restored by the composite substrate is higher, the growth speed is higher, the survival time is longer, and accordingly the phytoremediation efficiency is improved.

The invention provides a maximum power tracing method and system of a photovoltaic system. A disturbance observer can be built according to various uncertainty factors such as non-linearity, parameteruncertainty and random shadow environment during working of a photovoltaic power generation system, a voltage disturbance estimation value and a current disturbance estimation value are obtained after a voltage observation value and a current observation value are input the disturbance observer, a sliding plane is calculated according to the voltage disturbance estimation value and the current disturbance estimation value, an actual control voltage and a control current are obtained by sliding-mode control on the two disturbance estimation value, and maximum power point tracing of photovoltaic power generation is finally achieved. Maximum power tracing of the photovoltaic system under a local shadow environment is achieved, and the maximum power point capturing capability of the photovoltaic system and the system control robustness are improved.

The invention provides a redundancy support method based on a DP3 (Dynamic Positioning 3) drilling ship benefit fast Ethernet system. A network system is divided into a network A and a network B which are of A60 division, all NETWORK SWITCH BOXes are designed as groups A and B according to the network A and the network B, and all work stations are simultaneously connected to paths A and B; any one of the network A and the network B is simultaneously connected to all controllers and sensors in main DP and a standby DP; when any point on the network A has a fault, the system automatically judges and acquires data by virtue of the network B, and the reverse is true. A modular design is adopted, the redundancy support method completely conforms to the DPS3 (Data Processing Station 3) standard and can be used for realizing efficient allocation, management and scheduling of electrical energy of a drilling ship; the system structure is concise and clear, and the cost control is reasonable; the stability, security and reliability of the system can be obviously improved.

The invention discloses an embedded strip for an epoxy resin-based fiber-reinforced high-modulus wind turbine blade, equipment and a process. The embedded strip comprises a composite material body andcomposite surface felts which are arranged on the upper surface and the lower surface of the composite material body; the composite material body is a glass fiber reinforced epoxy resin composite material; and glass fibers comprise twistless roving glass fibers, bulked yarn glass fibers and glass fiber cloth, the twistless roving glass fibers and the bulked yarn glass fibers are uniformly arranged in the composite material body in multiple layers in the length direction to form a multi-layer structure, and at least one layer of glass fiber cloth is arranged in the multi-layer structure in thelength direction. The embedded strip is a high-modulus embedded strip reinforced by epoxy resin-based fibers, and the embedded strip manufactured by the method has the advantages of high modulus, certain toughness and ageing resistance, and can meet the production requirements of blades of units with the power of less than 7MW at present.

A 66kv side structure of a compact 500kv main transformer comprises an A, B, C three-phase transformer. The three-phase transformer is connected to a main loop through a triangle bus. The main loop is connected with a 66kv bus and a switch branch loop. The 66kv bus and the switch branch loop are connected with each branch loop. The branch loop comprises: a capacitance branch loop and a reactance branch loop. The capacitance branch loop comprises: a shunt capacitor group and a series reactor connected with the shunt capacitor group. The reactance branch loop comprises a three-phase reactor. The triangle bus uses a gas insulation bus to complete triangle winding. In the capacitance branch loop, A, B, C three phases are superposed to place in the each shunt capacitor group. In the reactance branch loop, the reactor is a superposition-type dry parallel hollow reactor or a magnetic-shielding parallel reactor.

The invention discloses an anti-fracture instrument cable material. The anti-fracture instrument cable material comprises, by weight, 20-40 parts of PBT resin, 5-10 parts of SEBS resin, 5-10 parts of trioctyl trimellitate, 5-10 parts of phosphorous ester, 3.5-5.5 parts of gamma-glycidoxy propyl trimethoxy silane, 10-20 parts of aluminium hydroxide flame retardant, 2-5 parts of polyethylene wax, 0.5-2 parts of potassium persulfate, 0.1-0.2 part of montmorillonite, 2.5-4.5 parts of zinc stearate and 0.1-0.2 part of titanium dioxide. The anti-fracture instrument cable material has more excellent anti-fracture performance, cables can be prevented from being fractured in the using and mounting processes or in various environments, and formula cost control is more reasonable.

The embodiment of the invention discloses a difference upper limit obtaining method, a fixed point method and a device thereof, wherein the difference upper limit obtaining method comprises: obtaining the difference of the maximum and the minimum of the branch measurement; determining the number of the preferred path and the constraint length of the convolutional coder; obtaining the difference upper limit of the cumulated measurement of the preferred path. The fixed point method includes: obtaining the difference upper limit of the cumulated measurement of the preferred path; performing the normalization process on the cumulated measurement of the preferred path according to the selected normalization value; determining the bit wide of the cumulated measurement of the preferred path according to the selected normalization value and the difference upper limit of each cumulated measurement of the preferred path. The difference upper limit obtaining method can effectively guide the acquisition of the difference upper limit of the cumulated measurement of the preferred path, furthermore, the fixed point bit width can be reasonably arranged through performing the fixed point on the cumulated measurement of the preferred path after being normalized, which ensures the performance of the fixed point of the encoder and reasonably controls the complexity and the cost of the encoder.

The invention relates to an electrically-heated and water-cooled foam forming upper mold, belonging to the technical field of foam forming molds. The upper mold comprises an upper mold frame and a heat conducting aluminum block, wherein an insulating plate, an electric heating wire and the heat conducting aluminum block are sequentially arranged in the upper mold frame from top to bottom, a cooling water passage is transversely formed in the heat conducting aluminum block, the left side of the cooling water passage is communicated with a cooling water outlet pipeline, the right side of the cooling water passage is communicated with a cooling water inlet pipeline, and a water tank, a delivery pump and a cooler are sequentially arranged between the cooling water outlet pipeline and the cooling water inlet pipeline. The upper mold is simple in structure, facilitates the design of a foam forming mold, and ensures the qualified rate of a product; under the coordination of the water tank, the delivery pump and the cooler, the cooling time after the product is formed is greatly shortened, and the production efficiency is effectively improved.

The invention discloses a smelting furnace heated through combination of heavy oil burning, gas burning and electric arc heating. The smelting furnace comprises a furnace body arranged on a furnace base, the furnace body comprises a side wall, a furnace top, and a fire resistant furnace bottom arranged on the furnace base; a hearth of the furnace body is divided into two parts including a smelting area and a settling area, a furnace bottom of the settling area is lower than a furnace bottom of the smelting area, the furnace bottom of the smelting area adopts an inclined type, one end, adjacent to the settling area, of the smelting area tilts down and is communicated with the settling area, a feed port is formed in a furnace top at one end, far from the settling area, of the smelting area, burners are arranged on opposite two side walls in the smelting area, a graphite electrode penetrating through the furnace top is arranged on the settling area, and a slag discharge port and a hot metal discharge port are respectively formed in the bottom of the settling area. The smelting furnace combines the advantages of gas burning heating and electric arc heating, and has the advantages of low smelting cost, environmental friendliness, high product quality, high handling capacity of single furnace, wide applicability of raw materials, high recovery rate and the like.

The invention relates to a method for evaluating the low noise wires of 1000kV ultra-high voltage alternative current transmission lines, comprising an evaluation factor, an evaluation range, an evaluation standard and a measurement method, wherein the evaluation factor means the audible noise; the evaluation range uses the 100 strip regions at two sides of the projections of the edge wires of a transmission line as the audible noise range; the evaluation standard means that the limit value of the audible noise is 52dB(A) and the limit value at populated country is 45dB(A); the measurement method means doing measurement at the projection of the edge wires and the 15m, 20m, 50m and 100m parts outside from the projections. The invention considers the characters of low noise wires of 1000kV transmission lines to provide a reasonable low noise wire evaluation method for 1000kV transmission lines, and the invention can reduce the noise of ultra-high voltage transmission and transformation projects according to the evaluation method, and can reasonably control the project costs.

The invention relates to a compact 35kv side structure of a 500kv main transformer, which comprises an A, B, C three-phase transformer which is connected with a main circuit by a triangular bus, the main circuit is connected with a 35kv bus which is connected with all branch circuits, and each branch circuit comprises a capacitance branch circuit and a reactance branch circuit; the capacitance branch circuit comprises a parallel capacitor set and a serial rector connected with the parallel capacitor set; the reactance branch circuit comprises a three-phase reactor; the triangular bus adopts a dry insulated bus for accomplishing a triangular winding; A, B, C three phases are overlaid in each parallel capacitor set in the capacitance branch circuit; and in the reactance branch circuits, the reactors are piled dry parallel air-core reactors or magnetic-shielding parallel reactors.

The invention belongs to the technical field of liquefied natural gas (LNG) storage and gasification, and relates to a floating storage and gasification device which constantly supplies natural gas fuel to port natural gas users and power stations. The floating storage and gasification device comprises at least one medium-pressure region storage tank arranged on a ship body, a low-pressure region buffer tank, an immersed pump box and an LNG gasification device, wherein the low-pressure region buffer tank, the immersed pump box and the LNG gasification device are sequentially connected with the medium-pressure region storage tanks. Limited to industrial standards, liquid outlets of the low-cost medium-pressure region storage tanks with outer layers made of a carbon steel material are formed in the tops of tank bodies, continuous flow of LNG is achieved through the working air pressure difference between the medium-pressure region storage tanks and the low-pressure buffer tank, and then continuous supply of the high-pressure LNG is achieved. The floating LNG storage and gasification device has the advantages of being convenient to dock, low in manufacturing cost, capable of achieving continuous gas supplying, easy to control and the like.

The present invention discloses a digital recording and processing device for mass data of audio and video. The digital recording and processing device is characterized by including a multimedia processor, an analog front end circuit, a DDR memory, a power source, a power source protective circuit, a Beidou module, a 3G module, an audio and video input circuit and a communication circuit, wherein an output end of the power source is connected to an input end of the power source protective circuit, an output end of the power source protective circuit is connected to an input end of the multimedia processor, an information output end of the DDR memory is connected to an information input end of the multimedia processor, a signal output end of the Beidou module is connected to the input end of the multimedia processor, a signal input end of the audio and video input circuit is connected to a signal input end of the analog front end circuit, a signal output end of the analog front end circuit is connected to the input end of the multimedia processor, a signal output end of the 3G module is connected to the input end of the multimedia processor, and the communication circuit is connected to the input end of the multimedia processor.

The invention relates to a noise immunity determination method for secondary equipment inside a small protection room, which comprises a determination range, determination level and requirement, a determination criterion, and a measurement method, wherein the determination level and requirement have decisive effect on a determination result, and are test classes and test values of various test items. The method is a safe, reliable, simple and practical evaluation method; and the noise immunity performance of the secondary equipment is correctly standardized through the method, which is an important evidence for reducing engineering cost.