35results about How to "Suitable for protection" patented technology

The invention relates to a target voice privacy protection method and a target voice privacy protection system. The method comprises the following steps of: generating an interference voice signal based on a target voice signal, and combining the existing interference signals in an interference repository to synthesize composite interference sound, wherein the target sound and the composite interference sound are played by loudspeaker systems at different positions in a room. In the system, the interference voice signal is generated on the basis of the target voice signal, and the existing interference signals in the interference repository are combined to synthesize the composite interference sound, wherein the target sound and the composite interference sound are played by the loudspeaker systems at different positions in the room. The interference sound is a composite interference signal comprising a target voice signal-related part, wherein the related part is generated by processing the target voice signal, and the interference sound has the advantages of high interference efficiency and low annoyance. In addition, the interference sound and the target sound are played by the loudspeaker systems at different positions in the room, a sound signal is picked from interference voice recording equipment, and normal operation of a conference is not influenced basically.

The invention relates to a sound-absorbing radiation protective paint, which comprises the following components in percentage by weight: 30 to 38 percent of porous modified starch, 5.0 to 9.5 percent of styrene-acrylic latex emulsion, 33 to 41 percent of barite, 0.5 to 1 percent of iron oxide, 0.25 to 1 percent of sodium polycarboxylate dispersant, 0.01 to 1 percent of brightening agent, 1.0 to 6 percent of titanium white, 0.5 to 1 percent of defoamer, 0.01 to 1 percent of mildew preventive, 13 to 18 percent of water, 0.4 to 1 percent of ethylene glycol, 0.3 to 1 percent of film-forming auxiliary agent, 0.005 to 1 percent of anti-freeze agent, 0.5 to 1 percent of graphite, 1 to 3 percent of hydroxyethyl cellulose and 0.20 to 1 percent of thickening agent. A preparation method of the sound-absorbing radiation protective paint comprises the steps of: (a) premixing, namely stirring 1/2 water, the sodium polycarboxylate dispersant, 1/2 defoamer, the mildew preventive, the thickening agent, the hydroxyethyl cellulose and the brightening agent at low speed to form colloidal solution; (b) dispersing and grinding, namely adding the titanium white, the barite, the graphite and the iron oxide into the colloidal solution and stirring the solution at high speed to prepare uniform sizing agent; (c) paint mixing, namely adding crylic acid emulsion, the film-forming auxiliary agent and the anti-freeze agent into the sizing agent, uniformly stirring the sizing agent, then dividing the porous modified starch into 1 to 5 parts, and adding the porous modified starch by 1 to 5 times into the mixture for low-speed and uniformly stirring the mixture; and (d) packaging the resulting product.

The invention relates to a method for ultrasound-pulse electrodepositing of chromium and chromium alloy composite plating layer in a tervalent chromium plating bath system, pertaining to the technology of surface engineering and surface processing. The method comprises the pretreatment of to be plated articles and the ultrasound-pulse electrodepositing. By using the method, a Cr/SiC or Cr/SiO2 composite plating layer with 0 to 5.5 percent of composite particles, a Cr-Ni/SiC or Cr-Ni/SiO2 alloy composite plating layer with 0 to 3.9 percent of composite particles, and a Cr-Ni-Fe/SiC or Cr-Ni-Fe/SiO2 composite plating layer with 0 to 4.4 percent of composite particles can be obtained. The thickness of the composite plating layer can be thickened with the electrodepositing time, with the largest thickness of 18.26Mum. The composite plating layer is compact and smooth and can be well combined with the substrate, and has good wearing resistance and corrosion resistance.

The invention discloses a preparation method of a high capacity porous silicon material. The method is characterized by specifically including: placing magnesium silicide powder in nitrogen atmosphere, conducting 600-800DEG C heat treatment, then performing pickling and aftertreatment to obtain the porous silicon material with high capacity. The preparation method of the high capacity porous silicon material provided by the invention uses nitrogen atmosphere to replace air atmosphere, avoids oxidation of silicon at the same time of porous silicon preparation, and has no need of high volatility hydrofluoric acid to conduct treatment, and the process is simple, efficient and environment-friendly. The prepared porous silicon has very low oxygen content, can be applied as a negative electrode material in a lithium ion battery to remarkably improve the specific capacity and cycle stability of the lithium ion battery.

A fire retardant for wood is proportionally prepared from amino compounds, P contained compound, alcohol compound, boron compounds, aldehyde compounds and water. It has also the anticorrosion and insect-proof functions.

The invention discloses a differential protection method for a distributed transformer. A decentralized collection mode is adopted for analog quantity and switch quantity of a distributed transformer protection device; backup protections of the transformer are arranged on different sides and are independent; differential protection is realized by an individual comprehensive protection device; a differential protection balance coefficient is automatically adjusted according to an actual gear of a voltage regulation switch; differential protection calculation and logic identification are performed on synchronized sampled values of all the sides and the adjusted balance coefficient by the comprehensive protection device; differential protection is transmitted to the protection device on each side and tripping is performed after the differential protection is acted. Unbalance current caused by gear adjustment can be eliminated after the balance coefficient of the differential protection is adjusted according to the actual gear of the voltage regulation switch, so that the sensitivity of main transformer differential protection is improved. The method is simple and practical, is low in manufacturing cost and is suitable for a locally mounted transformer protection.

The invention provides a fruit protection bag which can be covered on fruits such as grapes, pears, apples and the like to protect the fruits from being damaged by birds or sunburn. The fruit protection bag comprises a bag main body made from a transparent or semitransparent thermoplastic resin film and a light scattering part made from thermoplastic resin, wherein at least two side edges of the bag main body except for an opening part are melted and covered; the whole surface is provided with a plurality of venting pores; and the light scattering part is folded on either side or two sides of the back surface of the bag main body and is melted and covered on two side edges close to the opening part in a stripping mode. The fruit protection bag further comprises a tightening installation part, and the tightening installation part consists of one of a raised tightening rope, a tightening installation piece or a tightening metal wire, wherein the tightening rope is melted and covered close to the opening part of the bag main body, is used for tightening the bag main body on a support branch part, is provided with a clamp bulge and is made from thermoplastic resin; the tightening installation sheet is made from the thermoplastic resin; and the tightening metal wire is covered by the thermoplastic resin. The light scattering part is formed by mixing the thermoplastic resin with one of white colorant, pearl colored colorant or metallic powder or printing or coating on a film.

The invention relates to a high-voltage bidirectional ESD protective device based on a longitudinal NPN structure. The high-voltage bidirectional ESD protective device based on the longitudinal NPN structure comprises a P type substrate, a first high-voltage N type trap, a second high-voltage N type trap, a first P-body injection region, a second P-body injection region, a first N+ injection region, a first P+ injection region, a second N+ injection region, a third N+ injection region, a second P+ injection region, a fourth N+ injection region and a plurality of oxide isolation layers. Compared with the prior art, the reverse PN junction of the inside longitudinal NPN structure is triggered to conduct under the forward or negative ESD pulse effect, and meanwhile, the positive PN junction in the other N trap is conducted, an ESD current discharge route composed of a longitudinal NPN transistor and a forward diode in a series mode would be generated, the voltage of the device can be kept temporarily through respectively stretching the emitting zone width of each of two NPNS and separately changing the forward or reverse ESD pulse, and the device use environment flexibility is improved.

A recombinant adenovirus expressing human rotavirus VP7 and its preparing process and application are disclosed. It is a non-replicative recombinant one with deficient regions E1 and E3 in its genom.The human rotavirus VP7 gene expression box is inserted into the position where there is deficient region E1. It can infect the intestine tract and the respiratory tract, induce the generation of mucosa immune and neutralize the antibody. It can be used to preven the acute infantal diarrhea caused by rotavirus infection.

The invention relates to antistatic pearl wool and a preparation method thereof. The antistatic pearl wool comprises the following preparation raw materials in parts by weight: 100-155 parts of polyethylene, 3-5 parts of an antistatic agent, 10-19 parts of titanate modified calcium carbonate, 1-3 parts of talcum powder, 1-3 parts of a silane coupling agent and 10-20 parts of a mixed foaming agent,wherein the mixed foaming agent comprises a mixture of monoglyceride and butane, and the weight of monoglyceride accounts for less than or equal to 80% of the total weight of the mixed foaming agent;polyethylene particles, special anti-static water-soluble particles and the like are preferably selected to be mixed according to a certain proportion, a certain amount of butane gas and monoglyceride are introduced through a pressure pump to serve as foaming agents. Compared with the common anti-static pearl wool, the anti-static pearl wool has a better anti-static effect and the anti-static effect can be achieved for a long time.

The invention relates to an imidacloprid suspension, which is prepared from 1 to 80 weight parts of imidacloprid, 3 to 10 weight parts of dispersant or 5 to 30 parts of penetrating agent, 2 to 6 weight parts of antifreeze, 0.1 to 1.5 weight parts of thickener, 0.1 to 2.8 weight parts of defoaming agent and 5 to 90 weight parts of deionized water. The suspension has high suspension rate, more stable hot storage performance; and in field aphid prevention and control experiment, the dose of imidacloprid is low, and the pest killing effect is remarkable.

The invention provides a castable silicone rubber base temperature resistant shielding material and a preparation method thereof. The raw materials of the castable silicone rubber base temperature resistant shielding material comprise, by weight, 100 parts of hydroxy silicone oil, 2 to 25 parts of reinforcing agents, 2 to 100 parts of neutron protecting agents, 2 to 10 parts of crosslinking agents, and 1 to 3 parts of catalysts. The invention also provides the preparation method of the above-mentioned castable silicone rubber base temperature resistant shielding material. The castable siliconerubber base temperature resistant shielding material provided by the invention has excellent comprehensive performance, the preparation method is simple, the casting molding can be realized, and thematerial has great advantages in production, construction, installation and the like.

The invention relates to a temperature fuse module. The temperature fuse module comprises an insulation shell, wherein a first metal conductor is arranged in the insulation shell, one end of the first metal conductor extends out of the insulation shell and forms an electrode end of a connection circuit, the other end of the first metal conductor is connected with a second metal conductor through a fusible alloy or directly connected with an object to be installed, one end at which the first metal conductor and the second metal conductor or the object to be installed are connected is separated from the second metal conductor or the object to be installed after the fusible alloy is fused. Compared with the temperature fuse used in the current market, the temperature fuse module has the advantages that an elastic structure design is adopted, and functions of sensitive response, active and rapid power supply cut off and fire prevention are achieved; compared with the traditional temperature fuse and the traditional passively-heated fuse, the temperature fuse module has obvious advantages in feedback speed and high-current impact bearing; and the temperature fuse module can be applicable for and substitute the traditional temperature fuse and is suitably used for protecting various over-voltage circuits.

The invention relates to a wet chopped strand immersion agent and a preparation method thereof. The wet chopped strand immersion agent comprises 0.2-0.4wt% of acetic acid, 0.5-0.6wt% of coupling agent, 0.02-0.10wt% of cellulose ether, 0.01-0.08wt% of dispersing agent, 0.01-0.03wt% of lubricating agent, 0.002-0.008wt% of preservative and the balance of deionized water. During preparation, a component with the dispersion performance is added into the immersion agent, and the immersion agent is further matched with chemical raw materials used during wet mat dispersion of chopped strands, so that the appropriate lubrication and protection effects are realized during drawing, and the chopped strands further have better dispersion performance. The drawing operation can also ensure a stable state, and tows on the mat surface are reduced from about 3 per square meter to 0.1 and even 0 per square meter during the mat manufacturing process. The wet chopped strand immersion agent disclosed by the invention has low cost, and can a play a positive promoting role in enlarging the production of chopped strand mats of an enterprise, increasing the sales volume and creating profits.

The invention provides a high-hardness corrosion-resistant coating, a preparation method thereof and application of the high-hardness corrosion-resistant coating, and relates to the technical field ofcoating preparation. The high-hardness corrosion-resistant coating provided by the invention is comprises the following components by atomic percentage: 3%-14%of Si, 30%-33% of Ti and 55%-66%t of B;and the high-hardness corrosion-resistant coating is of a Ti(Si)B2 solid solution structure. Compared with a traditional binary boride coating, the high-hardness corrosion-resistant coating provided by the invention has higher hardness and corrosion resistance, keeps relatively low resistivity, and is suitable for protecting a metal bipolar plate of a fuel cell.

The invention relates to a bolt-connecting anti-theft iron well lid device of a sewer, which is used for covering the well lid of the sewer. The existing iron well lid on the road surface is easy to be stolen, and people are easily hurt due to holes left in the road surface. For the existing seat-connecting anti-theft well lid device, the peripheral road surface needs to be drilled when the well lid is replaced, and an electric device is needed, thus being not economic and inconvenient. According to the invention, a bolt is used for connecting the well lid and a well base through a double-layer hole of the well lid and the inner edge hole of the well base, and the upper part of the hole is sealed by a metal block. When the well lid needs to the uncovered, only a tool is used for hooking an uncovering hole of the well lid and the well lid is lifted upwards and rotated by 180 degrees. When the well lid needs to be replaced, only the metal block needs to be pried, the bolt is detached, the electric tool is not needed, and the road surface is not destroyed. A theft does not take risk of steeling the well lid as the well lid is troublesome to take and can make much loud noise, such that the well lid can be kept, and the bolt-connecting anti-theft iron well lid device is particularly applicable to protecting large and medium well lids.

The invention introduces and provides a holding frame (1) for a plug connector. The holding frame is used for accommodating a plurality of contacts (2) and has a basic frame (3). The basic frame has two mutually opposite side walls (4,4') and two mutually opposite end walls (5,5'). The holding frame according to the invention can be simply manufactured in a manner that spring arms (6,6') are respectively provided with at least one locking lug (7,7') which project inwards; the side walls (4,4') are respectively provided with at least one edge (8,8'); the edge and the locking lug (7,7') are correspondingly arranged separately, thereby realizing a fact that the locking lug (7,7') and the corresponding edges (8,8') are commonly used for fixing the contact (2).

The invention discloses a nylon hose storage and extraction device for a rail vehicle. The nylon hose storage and extraction device comprises a mounting base, protective frames, extraction units, detachable baffle plates, a rotary barrel, a rotary shaft and nylon hose rolls; the extraction units are arranged in the same side of the protective frames; the protective frames, the detachable baffle plates, the rotary barrel and the nylon hose rolls are stabilized on the mounting base through the rotary shaft; and each protective frame, the corresponding detachable baffle plate and the rotary barrel define a sealed space. The nylon hose storage and extraction device disclosed by the invention is simple in structure, is light in weight, is good in universality, simply and conveniently realizes open type customized mounting, is good in storage effect, is suitable for electrical wiring and station protection of railway vehicles, and effectively solves the problems that existing nylon hoses are dispersed, are cut disorderly, are twisted and are knotted, are messy on the scene and the like. By virtue of customized forms of the left protective frame and the right protective frame, nylon hoses of two models can be simultaneously stored and extracted; and the detachable type baffle plates are simple in structure, so that cycle use of the device is convenient.