73results about How to "Little impact on the external environment" patented technology

The invention provides an automatic regulating device for liquid crystal display luminance, which comprises a liquid crystal display, a camera and a computer, wherein the liquid crystal display comprises a signal processing circuit, a backlight control circuit and a backlight unit; the camera acquires an environmental image and transmits image information to the computer; the computer analyzes luminance information of the image and sends a corresponding control signal; the signal processing circuit receives the control signal and sends a corresponding adjustment signal; and the backlight control circuit receives the adjustment signal and correspondingly adjusts luminance of the backlight unit according to the adjustment signal. The automatic regulating device for the liquid crystal display luminance has low cost, adjusts the liquid crystal display luminance accurately, and has little external interference.

The invention relates to the field of optical holography anti-counterfeiting and in particular to a hologram with a special optical anti-counterfeiting effect generated on the basis of dynamic moire technology and a manufacturing method of a holographic motherboard. According to the moire fringe generated by the invention, fringe grating information is manufactured into a photoetching color graph and a photoetching gray graph by a computer processing means on the basis of a dynamic moire technology principle and then dynamic moire fringe information is transferred to the photoetching motherboard by using laser photoetching equipment. The dynamic moire effect obtained by the method can be identified under natural light; and in addition, the dynamic effect of moire fringe can be controlled, so that higher accuracy and convenience for anti-counterfeiting check of products are realized.

The invention provides a tortoise or trionyx sinensis spawning pond, which comprises a pond body, wherein the pond body is provided with a slope, a spawning table and a spawning groove, wherein the spawning table is provided with an installation groove; the spawning groove is arranged in the installation groove; the slope is arranged in the middle of a pond bottom; one end of the spawning table is connected with the slope; the other end of the spawning table is connected onto the pond wall; the spawning groove comprises a base plate and a three-face coaming arranged on the base plate; the spawning groove is provided with a filter screen layer and spawning sand covering the spawning groove; so that external influence on a tortoise or trionyx sinensis spawning process is low, the spawning sand is easy to clear, and the egg masses are easy to collect; after being taken out from the spawning groove, the egg masses are placed into cultivation water; and the spawning pond can be used as a tortoise or trionyx sinensis cultivation pond. The tortoise or trionyx sinensis spawning pond is simple in structure and is easy to realize.

The invention discloses a preparation method and application of a monodisperse polymer fluorescent microsphere. The invention provides a method for obtaining a functionalized fluorescent microsphere with a surface containing a carboxyl group or an amino group through a one-step method. The method comprises the steps of (1) providing an oil phase mixture, a water phase mixture and an initiator water solution; (2) fully mixing the water phase mixture and the oil phase mixture, pre-emulsifying and completely emulsifying to obtain an emulsion for standby use; (3) uniformly mixing the emulsion forstandby use and the initiator water solution; carrying out polymerization reaction under nitrogen protection and dark conditions, and purifying after finishing reaction, thus obtaining the polymer fluorescent microsphere. The preparation method provided by the invention is simple, the process is environmentally-friendly, and the cost is low; the obtained fluorescent microsphere is controllable inparticle size, uniform in size, high in fluorescent brightness, high in functional group content, and stable in performance, and has a better application prospect in immune side chromatography.

The invention relates to a method for measuring a power transmission cable tunnel axis through a multistage control network. The method comprises the following steps: performing the primary control network measurement and the plane contact measurement in order, wherein the primary control network measurement comprises performing coordinate collection and computation on a ground coordinate control point through a GPS system to acquire a coordinate of an underground wire coordinate control point; performing the elevation control network measurement and the elevation contact measurement in order to acquire the elevation of an underground wire elevation control point; combining the coordinate of the underground wire coordinate control point with the elevation of the underground wire elevation control point, and then laying the wire control points in the tunnel; and determining the cable tunnel axis. Compared with the prior art, the method disclosed by the invention has the advantages of being small in total scheme measurement error, high in wire coordinate measurement accuracy and small in influence of external environment on the measurement.

The invention discloses a nano graphene tunneling effect based artificial skin and a preparation method thereof. The nano graphene tunneling effect based artificial skin comprises a flexible substrate, a graphene layer and a metal electrode, wherein a device which can sense stresses and is composed of the metal electrode and graphene is located on the flexible substrate. The artificial skin is provided with good features of the graphene and has the advantages of being good in monatomic layer thickness and malleability, high in crushing resistance, good in electrical property and the like.

The invention discloses a cutting propagation process of psammosilene. The process comprises the following steps: firstly carrying out re-cultivation on the tender stems of the psammosilene female parent; taking a pair of stems with axillary buds and leaves as a cutting propagation unit when the tender stems grow to 3-8cm and cutting all cutting slips; inserting the cut materials on a barbed wire in sequence to ensure that the stem parts at the lower ends of the cutting slips are soaked in culture solution; taking out the cutting slips when the soaked stems are expanded and inserting the cutting slips on a preconfigured and disinfected seedbed; timely removing the flower buds when lateral buds sprout and flower buds appear. The cutting propagation process of psammosilene is capable of remarkably accelerating the propagation speed of the psammosilene, shortening the seedling growing period, improving the germchit quality, providing technical guarantee for accelerating the germchit production of the psammosilene and bringing significance to the biodiversity protection.

The invention provides a sine wave generating circuit for measuring resistance. The circuit comprises a CPU, a gate shaping circuit and a shaping and amplifying unit. The CPU generates two paths of square wave signals with a fixed duty cycle and transmits the signals to the gate shaping circuit. The gate shaping circuit converts the square wave signals into stepped waveform signals with alternating peaks and troughs. The shaping and amplifying unit converts the stepped waveform signals into sine wave signals. The sine wave generating circuit and the method for measuring resistance provided by the invention have the advantages of stable effect, low power consumption, high precision and are especially suitable for an occasion with large environment change and limited power supply such as wild, and the invention also provides a batter tester.

The invention discloses a capacitive microcomputer electromagnetic field sensor. The capacitive microcomputer electromagnetic field sensor comprises a silicon substrate, a silicon dioxide layer, a polycrystalline silicon layer and a silicon nitride layer which are sequentially arranged from bottom to top in an overlaying mode. The middle part of the silicon dioxide layer is hollow, a U-shaped beam is arranged in the middle part of the polycrystalline silicon layer and the middle part of the silicon nitride layer, and an anchor area is arranged around the silicon nitride layer. The root portion of the U-shaped beam is fixedly connected with the anchor area, and the U-shaped beam is in a suspending state. A driving metal wire is arranged on the upper surface of the silicon nitride layer of the U-shaped beam. A capacitive upper electrode plate bonding pad, a capacitive bottom electrode bonding pad and driving metal wire bonding pads are arranged in the anchor area. A first through hole with a metal column and a second through hole with a metal column are formed in the silicon nitride layer. The polycrystalline silicon layer of the U-shaped beam is connected with the capacitive upper electrode plate bonding pad through the first through hole so that a capacitive upper electrode can be formed, and the polycrystalline silicon layer is connected with the capacitive bottom electrode bonding pad through the second through hole so that a capacitive bottom electrode can be formed. A groove is formed in the polycrystalline silicon layer, and the groove isolates the capacitive upper electrode from the capacitive bottom electrode. The capacitive microcomputer electromagnetic field sensor can measure the amplitude of magnetic fields, and is simple in structure.

The invention discloses a server circulating packaging box with a buffering protection function, which comprises a bottom plate, first side plates and second side plates. The first side plates are installed on the upper and lower sides of the bottom plate; supporting plates are installed on the two sides of each first side plate; and second through holes are formed at the ends, close to the firstside plates, of the supporting plates. According to the invention, four supporting plates inside the packaging box are folded to form a U-shaped reinforcing structure, the pressure bearing capacity ofthe whole circulating packaging box is enhanced through the four-corner U-shaped structure; a buffering cushion is integrated in the box body; a product can be better protected; the server circulating packaging box is stable in performance and light in weight, is influenced by the external environment a little, and is convenient to package; the working efficiency is improved; a whole box body isfixed by the hook-and-loop fasteners so as to avoid damage to the box body; and the packaging box can be disassembled and recovered to the original state when not in use so as to facilitate next use,and thus, the packaging box can be recycled repeatedly, resource waste is reduced, packaging cost is reduced, and environmental protection is facilitated.

The invention provides an electrical operation authentication device using a two-dimensional code, which includes a host terminal and a handheld terminal, and is characterized in that the host terminal is connected to a host computer, and the handheld terminal scans the information displayed on the host terminal. The two-dimensional code is used to obtain electrical operation information, and at the same time, the secret key information is generated and sent to the host for authentication. The electrical operation authentication device using a two-dimensional code provided by the present invention is simple and convenient to operate, prevents operators from misoperating electrical equipment, reduces electrical operation risks, and eliminates illegal operations.

The embodiment of the invention discloses an antenna and an antenna array system. The antenna comprises a first antenna unit and a second antenna unit, wherein the first antenna unit is provided with a feed part and two first dipole subunits, and the two first dipole subunits are connected in a reactive mode; the second antenna unit comprises two second dipole subunits which are in reactive connection; the first antenna unit and the second antenna unit are arranged in a spaced mode, and the first antenna unit enables the second antenna unit to generate electromagnetic resonance in a coupled mode. A response frequency band is expanded in a double-vibrator mode, the electromagnetic signal response bandwidth of the antenna is increased, and the demand of wireless communication is met; meanwhile, the antenna has the advantages of being high in mechanical strength and capable of being little influenced by the external environment, the antenna form can be excellently maintained, and steady operation capacity of the antenna is improved.

The invention relates to a variable stiffness and energy dissipation type fabricated transverse connection structure and an installation method thereof, and belongs to the technical field of building structure earthquake resistance. The variable stiffness and energy dissipation type fabricated transverse connection structure includes an energy dissipation zone and a lifting zone, the energy dissipation zone uses the deformation energy dissipation of soft steel or stainless steel, the lifting zone uses the deformation energy dissipation of screws of common bolts, and threshold control is realized by setting the size of bolt holes on steel plates of the lifting zone. When small earthquakes and moderate earthquakes occur, end plates connected with structural members move relatively with the relative movement of the structural members, at the moment, energy dissipation steel plates dissipate energy through deformation, the first stage of energy dissipation is achieved; and When large earthquakes occur, the end plates move relatively and exceeds the threshold, screws in the lifting zone are in contact with bolt holes on variable cross-sections and starts to deform and dissipate energy, at the moment, the screws in the lifting zone and the steel plates in the energy dissipation zone commonly deform and dissipate energy, the second stage of the energy dissipation is achieved, jumping again can be achieved after bearing capacity reaches the peak value, after the earthquakes, components can be replaced or a whole damper can be replaced according to the actual damage of the damper, bolted connection can be easily replaced and disassembled, and the concept of sustainable development is met.

The invention relates to the technical field of acoustical products, and in particular relates to a silicon carbon vibration diaphragm, a preparation method of the silicon carbon vibration diaphragm,and an acoustical unit with the vibration diaphragm. The preparation method comprises the steps of preparing a carbon vibration diaphragm; providing the prepared silicon carbon vibration diaphragm; tightly connecting the carbon vibration diaphragm with a silica gel vibration diaphragm in a secondary forming mold. Through preparing the silicon carbon vibration diaphragm, the prepared silicon carbonvibration diaphragm has the advantages of light weight, wide sound range, good elasticity and rigidity, resistance to high temperature and fatigue, and small affect of external environment such as moisture; the novel silicon carbon vibration diaphragm is prepared by the way of secondarily forming the silica gel vibration diaphragm and the carbon vibration diaphragm, so that the novel silicon carbon vibration diaphragm can be conveniently installed on the acoustical unit of an electronic loudspeaker, and can also be directly integrally formed with the acoustical unit of the electronic loudspeaker; compared with the traditional technical scheme or the pure carbon vibration diaphragm or the pure silica gel vibration diaphragm, the novel silicon carbon vibration diaphragm has higher sensitivity and differentiation degree, simple technological operation and convenience in forming, and can achieve large-scale preparation.

The invention provides a seal structure and a ventilation valve and relates to the technical field of sealing with an aim to solve the problem about short service life due to a sealing strip of the ventilation valve is greatly affected by the external environment. The seal structure comprises an elastic sleeve which is made from metal materials, the elastic sleeve includes a connecting end and anelastic end with elasticity, the connecting end is connected with the elastic end to be used for being connected with valve blocks, and a cavity is formed in the elastic end. The seal structure is used for sealing between the valve blocks of the ventilation valve, sealing effect is good, and less affected by the external environment, the seal structure is long in service life.

The invention relates to a cunninghamia lanceolata endophytic fungus and a biological prevention and treatment application thereof. The cunninghamia lanceolata endophytic fungus is preserved in the China Center for Type Culture Collection, the preservation number is CCTCC No: M 2019895, and the preservation date is November 4, 2019. The Epicoccum dendrobii SMEL of the invention is the cunninghamialanceolata endophytic fungus, and can inhibit the growth of Cunninghamia lanceolata colletotrichum and reduce the biomass accumulation amount of Cunninghamia lanceolata colletotrichum; the inoculation test result shows that the plaque development of cunninghamia lanceolata anthracnose is significantly inhibited after inoculation with SMEL bacteria; and the SMEL strain has certain antagonistic effects against Cunninghamia lanceolata colletotrichum, Colletotrichum gossypii, Rhizoctonia sp., Cytospora chrysosperm, Fusicoccum aesculi and Alternaria sp. on the plate.

The invention relates to a Ku-band sea clutter measuring radar which is mainly composed of an antenna feed system, a transmitting system, a receiving system, a signal processing system, an environment monitoring system, a photoelectric tracking system, a servo system, a power supply system and a control system, wherein the antenna feed system is connected with the transmitting system and the receiving system respectively, the transmitting system and the receiving system are connected with the signal processing system, the signal processing system is connected with the control system, and the control system is respectively connected with the servo system, the environment monitoring system and the photoelectric tracking system. The Ku-band sea clutter measuring radar has the following advantages that: the radar has the measurement capability under the conditions of multiple directions, multiple frequency points and small grazing angle; and equipment can be remotely controlled through software. The Ku-band sea clutter measuring radar aims at completing measurement of sea clutter time and polarization properties and data storage by simulating the tail end movement environment of a high-precision guided weapon. A sea clutter database under various sea conditions is established and is used for simulating various battlefield environments afterwards and evaluating the clutter interference resistance of the high-precision guided weapon seeker.

A high-energy-consumption double-curved-surface seismic mitigation and absorption support comprises an upper seatplate, a guide friction pair, a middle seatplate, a spherical friction pair, concentric-square-shaped steel dampers, a lower seatplate and a limiting device. The bottom surface of the upper seat plate is a concave spherical surface, the top surface of the lower seat plate is a concave spherical surface, the upper surface and the lower surface of the middle seat plate are convex spherical surfaces matched with the concave spherical surface, and the upper seat plate, the middle seat plate and the lower seat plate form a rotating mechanism of the support;limiting devices for limiting the upper seatplate are arranged on the four sides of the lower seatplate respectively. The singleside, the two sides or the periphery of the support are each provided with theconcentric-square-shaped steel damper, each concentric-square-shaped steel damper is in the concentric-squareshape; an opening is formed in one side of each concentric-square-shaped steel damper, a dislocation height difference exists at each opening, the lower free end of each opening is connected with the lower seatplate, and the higher free end of each opening is connected with the upper seatplate. The high-energy-consumption double-curved-surface seismic mitigation and absorption support has various advantages ofa double-curved-surface seismic mitigation and absorption support, has high energy dissipation capacity, can meet various seismic requirements during bridge construction, and is particularly suitablefor high-intensity and long-period seismic areas.