31results about How to "Achieve multifunctional integration" patented technology

The embodiment of the invention discloses a graphene gas sensor and a preparation method thereof. The preparation method comprises the following steps: sequentially deposing a sacrificial layer and a strain membrane on a substrate firstly, then directly preparing a graphene layer on the strain membrane, or transferring the prepared graphene layer onto the strain membrane, forming a mesa by virtue of lithography and corrosion, and meanwhile, exposing the sacrificial layer; then continuously deposing a metal electrode on the graphene layer; and finally, laterally corroding the sacrificial layer to enable the strain membrane to separate from the substrate and self curling to form a tube, and obtaining the curled graphene gas sensor which is adhered to the inner wall of the tube. The graphene gas sensor has high sensitivity to various gas molecules, has a three-dimensional structure, is small in device size, simple in preparation method and low in cost and is suitable for mass production. In addition, according to the graphene gas sensor disclosed by the embodiment of the invention, with the tubular structure with controllable diameter, a natural conveying channel for a gas to be detected is provided, and the tubular structure can also be integrated with other on-chip micro-nano function units to construct a chip laboratory.

The invention discloses a preparation method for anti-dielectric substrate delamination of a multi-layer FSS radome. Before the radome is laminated, the polyimide frequency selective surface is plasma activated and the cyanate resin is sprayed for viscosity-increasing treatment; Quantitatively describe the influence of curing process parameters on the internal stress, establish the relationship model between the internal stress of the multilayer frequency selective surface stealth radome and the curing process parameters, and then make the polyimide frequency selective surface into prepreg; select according to the multilayer frequency The circuit design of the surface stealth radome requires the frequency selective surface and the layup sequence design of the composite material dielectric layer, and the layup is carried out according to the layup sequence; after the layup is completed, the autoclave is formed and cured. The invention makes up for the defect that air bubbles are easily trapped when the polyimide frequency selective surface and the dielectric layer prepreg are laminated in the traditional method, and solves the problem that the air bubbles cannot be excluded due to the barrier of the frequency selective surface when the dielectric layer is formed, and separation will occur. layer problem.

The invention belongs to the technical field of microfluidic spinning, relating to an integrated microfluidic spinning chip and a method for preparing regenerated silk fibroin by using the same. The integrated microfluidic spinning chip is of a three-layer structure, wherein the upper layer and the lower layer are provided with polydimethylsiloxane membranes of grooves, and the grooves are adhered with a middle dialysis membrane to form an upper microfluidic channel and a lower microfluidic channel. The depths of the two microfluidic channels are the same, and the widths gradually become small. The method for preparing the regenerated silk fibroin disclosed by the invention comprises the following steps: injecting spinning liquid in the upper channel and the lower channel at room temperature; injecting the mixed liquid of water-absorbent resin and ion adjusting liquid in the lower channel; and after the spinning liquid is adjusted via ions, cut, stretched and concentrated, extruding from an outlet, then solidifying in air as threads, and then winding the threads on rolls. The microfluidic chip disclosed by the invention can be used for simulating complex flow fields during the biological spinning process, and realizing the operations of the spanning liquid, such as cutting, stretching, component adjusting and concentrating. Compared with the spinning technology using a dry method, the method disclosed by the invention can be used for preparing good regenerated silk fibroin.

The invention discloses a device and method for collecting and storing microorganisms in frozen soil. The cantilever is released, the cantilever moves downward under weight, the drilling assembly drills the well and breaks the soil vertically, and the frozen soil isolation assembly and the drilling assembly move down synchronously to break the drilling assembly. Frozen soil isolation prevents cross-contamination; the drilling assembly moves down to the deepest position and stops rotating, connects the frozen soil isolation assembly with the power assembly of the drilling assembly, uses the rotating crankshaft of the drilling assembly to drive the rotation of the frozen soil isolation assembly, and uses the power assembly to drive the frozen soil isolation assembly The frozen soil storage point on the frozen soil is opened; the power assembly of the drilling assembly is stopped from rotating, and during the inertial rotation of the frozen soil isolation assembly, the power assembly drives the frozen soil storage point on the frozen soil isolation assembly to close; the cantilever is lifted to drive the drilling assembly and The frozen soil isolation components move up synchronously to complete the collection and induction of frozen soil; the invention realizes the collection and storage of frozen soil and its internal microorganisms during the drilling and crushing of frozen soil, improves efficiency and avoids cross-contamination of frozen soil microorganisms.

The present application relates to a germanium-silicon avalanche photodetector and its manufacturing method. The germanium-silicon avalanche photodetector includes a buried oxide layer, a bottom layer, an intrinsic germanium layer, a cover layer, a P electrode and an N electrode, and the bottom layer includes an intrinsic bottom silicon layer in turn. region, the transitional underlying silicon region, the multiplication region, and the N-type heavily doped underlying silicon region; the intrinsic germanium layer is set on the underlying layer; the covering layer covers the intrinsic germanium layer, and the covering layer includes the P-type heavily doped covering layer silicon region in turn , the silicon region of the intrinsic covering layer, the silicon region of the transition covering layer, the end of the silicon region of the transition covering layer away from the silicon region of the intrinsic covering layer is in contact with the silicon region of the transition bottom layer to form a charge transition region; the P electrode and the P-type heavily doped covering layer The silicon region is connected; the N electrode is connected to the N-type heavily doped underlying silicon region. The germanium-silicon avalanche photodetector of the present application does not use a stacked structure, which is convenient for integration with other functional components and can be mass-produced.

The invention discloses an automatic soil sample collection device used for soil testing and formulated variable fertilization, relates to an automatic soil sample collection device, and solves the time and labor consuming problems of soil sample collection in the process of soil testing and formulated fertilization in the prior art. The automatic soil sample collection device adopts an automatic soil taking manner of the principle of dynamics, power required for soil sampling can be provided only by cooperation of up-and-down motion of a subsoiler in a deep scarification process and forward movement of an agricultural machine without additional installation of a power device, and the automatic soil sample collection device is easy to operate and realize. A sample box can be moved by controlling of an electromagnet, so that separation and preservation of soil at different locations can be realized, and respective sampling and respective preservation of a plurality of samples can be realized. By use of GPS positioning information, longitude and latitude coordinates of each sampling point can be recorded, and each sample soil can be accurately located. The automatic soil sample collection device is suitable for automatic soil sample collection occasions of soil testing and formulated variable fertilization.

A method for realizing multi-service customization on a router, in which different services are customized on the router according to user requirements, and a method for realizing the DIY service of the router. It includes the following steps: 1), hardware configuration; 2), server board management; 3), message forwarding. The present invention provides a hardware platform capable of loading third-party software, and traffic can flow from a router to the hardware platform, and then return to the router after being processed by software on the hardware platform or be directly forwarded to the destination end.

The invention discloses a lathe-type adjustable simple tool system, the tool system utilizes great changeover amount of the change level of the diameter of an inscribed circle on an indexable blade with 3mm and different shape, great adjustment amplitude of the geometric angle of the blade and a cutting edge, self-locking property of a tool bit, strong reliability for self-protection, simple index, changeover and re-grinding of the blade, reliable positioning and high connection rigidness of the tool bit and a square holding sleeve by a tool rod, thus facilitating the adjustment of front and back angles; and the lathe-type adjustable simple tool system has broader range of application.

The invention relates to a one-dimensional nanoparticle polymer chain and a preparation method thereof. A five-step method is adopted to prepare a one-dimensional nanoparticle polymer chain containing alternating structural units shown in formula I, wherein A and B are functional nanoparticles, One of the nanoparticles of silicon dioxide, titanium dioxide, ferric oxide, zinc oxide, aluminum oxide, magnesium oxide, aluminum nitride, silicon nitride, and boron nitride; The distribution of polymer chain length is uniform and controllable, so that the spacing between nanoparticles is controllable, and at the same time, two different nanoparticles can be alternately arranged on the chain.