33results about How to "Long-term stable performance" patented technology

The invention relates to an optical fiber vibrating sensor and a power transmission line aeolian vibration monitoring system applying the same. The optical fiber vibrating sensor comprises a fixed body, a constant-strength beam and a contact body arranged on a lead wire, wherein the fixed body, the constant-strength beam and the contact body are connected in sequence. The fixed body is connected with the lead wire through a clamp arranged on the lead wire, and the upper and lower surfaces perpendicular to the axis of the constant-strength beam are symmetrically provided with fiber bragg gratings. The sensor is installed by adopting an upright method of hull section construction, and an installing point is a fatigue dangerous point of a ground conductive wire. The monitoring system comprises the optical fiber vibrating sensor, an optical fiber composite overhead ground wire, a wave-length adjusting device and a host machine which are connected in sequence. The sensor and the monitoring system have the advantages of being high in measuring accuracy, high in speed, good in frequency response, stable in long-term performance and the like, the problem that the prior art susceptible to influence of complicated electromagnetic environment, measuring accuracy, poor flexible, large size and poor system stability, cannot achieve field information transfer in real time and the like is solved, and the stability and reliability of the system are improved.

The invention discloses a pipeline joint coating structure comprising an abutting steel tube (1) and a two-end prefabricated anti-corrosive coating (2). The two-end prefabricated anti-corrosive coating (2) is circularly applied on the outer wall of the abutting steel tube (1). An epoxy primer layer (3) is arranged on the outer wall of a welding joint reserved in the abutting steel tube (1) and is fully covered with a layer of thermoplastic joint sheet (4). Two ends of the thermoplastic joint sheet (4) are in lap joint with two-end prefabricated anti-corrosive coating (2). According to the arrangement, the joint sheet structure is arranged outside the epoxy primer layer and maintains thermoplasticity, thereby completely fused with a surface layer of the two-end prefabricated anti-corrosive coating and the lap joint of the joint sheet; in this way, sealing effect is good, anti-corrosive structure is stable in long-term performance, and service life is long.

The invention discloses an expansive soil composite roadbed structure pattern and a construction method thereof. The expansive soil composite roadbed structure pattern comprises a bottom isolation layer, an expansive soil core filling area, an edge reinforcement and seepage prevention area, a geocell protection area, an upper embankment, a roadbed and a pavement structure layer. The expansive soilcomposite roadbed disclosed by the invention can form a closed waterproof or water-blocking system, external water is prevented from infiltrating into the expansive soil core filling area, the expansive soil core filling area is stable in humidity, and long-term performance stability of the expansive soil roadbed is guaranteed. Meanwhile, the roadbed structure pattern not only can utilize expansive soil along the line as a roadbed filler to the maximum extent, but also can overcome the defects that no available edge covering soil source exists around and chemical improvement pollutes the environment, and conforms to the ecological environmental protection concept.

The invention discloses a vegetation rod for desert planting as well as a manufacturing process and a use method thereof. The vegetation rod is internally provided with a water storage layer, so as to ensure the moisture during a growth process of plant seeds in the vegetation rod, and the moisture is buried at the bottom of a moving dune so as to prevent the movement of the moving dune and ensure the firmness of the moving dune; after irrigation, re-irrigation is not needed, and the plant seeds in the vegetation rod germinate and grow so as to break through a non-woven fabric at an outer layer and then grow out of the surface of the dune, so that desert planting is realized, layout is easy to implement, manpower and material resources are saved, ecological and economic benefits can be achieved stably for a long term, ecological restoration and ecological construction are quickened, and the vegetation rod has favorable application prospect.

The invention discloses side-chain amphoteric polyarylethersulfone, a preparation method thereof and a homogeneous amphoteric ion exchange film. The side chain type amphoteric structure polyarylethersulfone is composed of the following four kinds of repetitive structural units which are arranged randomly: a repetitive structural unit A, a repetitive structural unit B, a repetitive structural unitC and a repetitive structural unit D, the number-average molecular weight Mn of the side-chain amphoteric polyarylethersulfone is 50000-100000, and the number of the four repetitive structural units in the structure satisfies the following conditions: (a + b): (c + d) = 50-0%: 50-100%, and (a + c): (b + d) = 0-15%: 100-85%; the homogeneous side chain type amphoteric ion exchange film provided by the invention is a sodium type film prepared from polyarylethersulfone with a side chain type amphoteric structure, and then the sodium type is converted into an acid type. The ion exchange film has the advantages of low surface resistance, high ion conductivity, high mechanical property, good chemical stability, high monovalent anion selectivity, high monovalent anion flux and the like.

The invention belongs to the field of microbial products, and relates to a gel for female private parts, and concretely relates to a probiotic gel for recovering and stabilizing vaginal microbial florae, and a preparation method thereof. The probiotic gel comprises, by weight, 0.5 to 1.0 percent of carbomer U20, 0.5 to 2.0 percent of hyaluronic acid, 0.3 to 1.0 percent of recombinant human collagen, 0.5 to 2.0 percent of propylene glycol, 1 to 2 percent of bifidobacterium lysate liposome freeze-dried powder, 0.1 to 1.0 percent of lactobacillus fermentum, 0.1 to 1 percent of lactobacillus reuteri, 0.1 to 1.0 percent of lactobacillus rhamnosus, 0.1 to 1 percent of lactobacillus acidophilus, 0.01 to 0.1 percent of mint extract, 0.004 to 0.02 percent of antibacterial peptide, and the balance of purified water. By adding the bifidobacterium lysate, the lysate has a good effect on killing pathogenic bacteria and can stably play a role for a long time; and by adding the recombinant human collagen, the collagen has a good effect in promoting colonization of the probiotics, so that the probiotics can better tolerate inflammatory stress and survive.

The invention discloses a high-performance silicon-carbon negative electrode material and a preparation method thereof, and relates to the technical field of lithium ion battery negative electrode materials. The preparation method comprises the following steps: adding graphite into an alkali solution, stirring, drying, carrying out high-temperature etching in an inert atmosphere, washing with water, and drying; adding the etched graphite and a catalyst into an ethanol solution, adding tetraethyl orthosilicate, carrying out a stirring reaction, washing, and drying to obtain a sol-gel product; adding a sodium chloride solution into the sol-gel product, stirring, drying, carrying out thermit reaction in an inert atmosphere, carrying out acid pickling, and drying; and dispersing the carbon precursor into a solvent, adding the thermit reaction product, stirring, drying, and carrying out high-temperature carbonization treatment to obtain the product. According to the invention, the etched graphite material is firstly used as a matrix, then a small amount of silicon material is loaded on the matrix by a sol-gel method, and a framework is constructed by carbon coating, so that the obtained material has good lithium ion intercalation and deintercalation capability, high capacity and good rate capability, and the preparation method is simple and low in cost.