49results about How to "Improve the transfer coefficient" patented technology

A semiconductor transistor device includes one or more conductive base regions, a first semiconductor barrier region, a second semiconductor barrier region, a conductive emitter region, and a conductive collector region. The first semiconductor barrier region or the second semiconductor barrier region has a dimension smaller than 100 Å. A first Schottky barrier junction is formed at the interface of the first semiconductor barrier region and the one or more conductive base regions. A second Schottky barrier junction is formed at the interface of the second semiconductor barrier region and the one or more conductive base regions. A third Schottky barrier junction is formed at the interface of the conductive emitter region and the first semiconductor barrier region. A fourth Schottky barrier junction is formed at the interface of the conductive collector region and the second semiconductor barrier region.

The present invention is directed to a batch type projection exposure apparatus for being used with a scanning type exposure apparatus. The apparatus may include an illumination optical system and a projection optical system. The illumination optical system may have a light source that illuminates a mask with an exposure light from the light source, and the projection optical system may have an image field that projects a reduction image of a pattern on the mask onto the image field on a work piece. The image field may include a rectangular shaped pattern transfer area of the scanning type exposure apparatus. The projection optical system may also have a numerical aperture at the side of the work piece that is greater than or equal to 0.5 m, and a rectangular pattern transfer area which is same as the rectangular shaped pattern transfer area of the scanning type exposure apparatus. The rectangular pattern transfer area of the projection optical system may be encompassed within the image field on the projection optical system.

The present invention concerns a method of measuring the wear on at least one tire (20) mounted on a wheel (10) and comprising tread pattern elements (27, 28), and a tire (20), wheel (10), and a tire/wheel assembly (1) for implementing this method. According to the invention, the wear measurement method includes detecting electromagnetic energy transmitted through a transmission element disposed in at least one tire tread element to an internal space of the tire, the energy detected representative of a wear condition of the tread element or elements (27, 28). A tire (20) according to the invention comprises at least one device for transmitting electromagnetic radiation (50, 60), which device is disposed in at least one of tread element (27, 28) to conduct incident radiation striking the external surface to the tire (20) to the internal space, the transmission devices (50, 60) becoming exposed to the external surface upon a predetermined amount of wear of the tread element (27, 28).

The invention discloses surface-modified inorganic nanoparticles as well as a preparation method and application thereof. The surface-modified inorganic nanoparticles are composed of a core of inorganic metal oxide nanoparticles and amphipathic organic segments grafted on the surface of the particles, wherein the amphipathic organic segments grafted on the surface of the particles account for 0.1-50% of total mass of the surface-modified inorganic nanoparticles; the inorganic metal oxide nanoparticles refer to one or several in aluminum oxide, silicon dioxide, titanium dioxide, zirconium dioxide and zinc oxide inorganic nanoparticles; and the amphipathic organic segments are produced from a vinyl silicane coupling agent and 2-acrylamido--methylpropane sulfonic acid through solution polymerization. The surface-modified inorganic nanoparticles can be used for preparing polymer electrolyte. Therefore, the inorganic nanoparticles are high in dispersity in a polymer matrix, and the prepared polymer electrolyte is high in lyotropic property, high in ionic conductivity and stable in electrochemical performance.

The invention discloses an ozone catalytic oxidation method and device. The device comprises a contact oxidation tank, a water input pipe, a booster pump, a high-efficiency dissolved-air ejector, a perforated pipe water distributor, a catalyst filling material separation plate, a catalyst filling material, an ozone air inlet pipe, an ozone tail gas air inlet pipe and an ozone tail gas destroying device. The contact oxidation tank has a multi-section shunting type, sewage flows into the contact oxidation tank from the bottom and flows out from the top, and an up-flow contact oxidation reaction route is formed. Ozone is fully mixed with sewage and dissolved through the high-efficiency dissolved-air ejector, and is distributed at the bottom of the reaction tank through the perforated pipe water distributor. The catalyst filling material separation plate is arranged at the bottom of the reaction tank, and a catalyst layer is arranged on the separation plate. The catalyst is a high-efficiency load-type catalyst with metal and metal oxide loaded on a porous carrier. Sewage and ozone are subjected to a heterogeneous catalysis reaction in the contact oxidation tank under catalysis of the load catalyst, the ozone utilization efficiency and the oxidation efficiency are raised greatly, the ozone addition amount is reduced, and the operation cost is lowered.

There is provided a rear projection screen for transmitting image light. The rear projection screen has a plurality of single lenses arrayed evenly on an incident plane for inputting the image light and having focal points in the vicinity of an outgoing plane of the rear projection screen, an incident-side black matrix, formed in lens boundaries where the plurality of single lenses adjoin each other, for blocking the image light incident on the lens boundaries and an outgoing-side black matrix in which an opening centering on an optical axis of the single lens is formed in the vicinity of each focal point of the plurality of single lenses in the vicinity of the outgoing plane of the rear projection screen.

The invention relates to an RFID (radiofrequency identification) tag applied to intensive distribution scenarios and a mutual impedance design method thereof. The RFID tag designed comprises a dielectric substrate, a metal microstrip antenna and a chip; the metal microstrip antenna and the chip are arranged on the dielectric substrate. The metal microstrip antenna is composed of a pair of radiation patches, a pair of bent radiation arms and a resonant matching ring. The radiation patches are in a rectangular shape. The bent radiation arms are in an M shape; 10 folds are made on each side of the bent radiation arms. The resonant matching ring is U shaped; two vertical arms of the resonant matching ring are connected with a feeder; the feeder is welded to an anode and a cathode of the chip and connected in a single-port manner. By the use of the mutual impedance design method to the RFID tags, mutual coupling of RFID tags is decreased. The RFID tag has a maximum transmission coefficient 0.8, a maximum gain 2.28dbi and a longest reading distance 10m under operating frequencies; the RFID tag has a wider range of coverage. Under the frequency 920MHz, the RFID tags spaced by 2mm generate mutual impedance less than 50ohm; a good capacity to recognize multiple RFID tags is provided.

The present invention discloses Agrobacteriumsp. having free-living nitrogen fixing ability, wherein a classification name of the Agrobacteriumsp. is Agrobacteriumsp. Ymu6-2, the Agrobacteriumsp. is preserved in the China General Microbiological Culture Collection Center (CGMCC), and a preservation number is CGMCC No.5007. The Agrobacteriumsp. having free-living nitrogen fixing ability in the present invention has the following advantages that: high nitrogen fixing ability is provided; high concentration Cd growth can be resisted; indole-3-acetic acid can be secreted to produce iron atoms; with the prepared microbial agent, over-accumulated plant growth can be significantly promoted, biomass of over-accumulated plants can be increased, a heavy metal enrichment coefficient and a heavy metaltransfer coefficient of over-accumulated plants can be substantially increased, soil ecology environment can be improved, and advantages of environment-friendliness and low cost are provided.

The invention discloses an acinetobacter with authigenic nitrogen fixation capacity, which is classified and named as Ymu7-3 and is preserved in China general microbiological culture collection center (CGMCC) with the preservation number of CGMCC No. 5006. The free living nitrogen fixing bacteria has high nitrogen fixing capacity, is capable of resisting the growth of Cd with higher concentration, and can secrete heteroauxin so as to generate iron atom; and the prepared microbial bacterium agent can remarkably promote the growth of hyper-accumulating plants, increase the biomass liveweight of the hyper-accumulating plants, greatly improve the heavy metal enrichment factor and transfer coefficient of the hyper-accumulating plants, and improve the ecological environment of the soil, thus being environment-friendly and low in cost.

A vehicle with a front fascia and a decorative badge integrated with the fascia. A rear surface of the badge is attached to a front portion of the fascia. The portion of the fascia to which the badge is attached is the badge mounting region, and the fascia's portion surrounding the badge mounting region is the fascia surrounding region. A radar system mounted behind the fascia emits radar beams in forward direction, which are intercepted by the fascia and the badge in the badge mounting region, and by the fascia, in the fascia surrounding region The rear surface of the fascia in the badge mounting region is indented the amount of the badge's average thickness, and the cumulative average thickness of the badge and the fascia material in the badge mounting region remains uniform throughout, equal to the average thickness of the fascia in the fascia surrounding region.

The invention relates to a radio frequency identification (RFID) label and an RFID label antenna. The RFID label antenna comprises a radiation layer, a ground layer and a dielectric layer, wherein thedielectric layer is used for converging and transferring energy radiated from the radiation layer to the ground layer, the radiation layer and the ground layer are conducted by a short-circuit pin, the radiation layer comprises at least two radiation bodies and an isolation structure, the at least two radiation bodies are suitably used for simulating different resonant frequencies, the isolationstructure is suitably used for isolating the at least two radiation bodies, the at least two radiation bodies comprise at least one first radiation body, and the impedance where a resonant frequency simulated by the first radiation body is located is determined by coupling degree between the impedance and resonant frequencies simulated by other radiation bodies. By employing the RFID label antenna, the reading distance of the RFID label with a PIFA antenna can be expanded.

A phase-change optical disk includes a recording film, a reflection film and a dielectric film including oxide of at least one element selected from a first group consisting of niobium and zinc as the principal ingredient thereof and oxide of at least one element selected from a second group consisting of aluminum, tantalum, silicon, cerium and hafnium. The composition ratio of the oxide of the at least one element selected from the second group in the dielectric film is between 10 mol % and 45 mol %. The oxide film prevents sulfuration of the recording film including Ag.

The invention provides a preparation method of a polyvinyl acetal solid electrolyte. The preparation method comprises the steps of respectively reacting polyvinyl formal or a homologue of polyvinyl formal and polyvinyl alcohol with boric acid, oxalic acid and lithium salt in an organic solvent system step by step, performing mixing in proportion, performing washing, suction filtration and drying, synthesizing high-purity polymer lithium salt with a lithium mono(oxalato) borate structure grafted on a polymer molecular chain, dissolving the high-purity polymer lithium salt in an organic solvent to form a settled solution, and finally preparing the solid electrolyte. The solid electrolyte prepared by the method has lithium ion migration number approximate to 1, excellent room-temperature conductivity greater than or equal to 10<-4>S/cm, a wide electrochemical stability window greater than or equal to 6V(vs.Li/Li<+>), outstanding thermal stability, high tensile strength greater than or equal to 35MPa, and excellent comprehensive performance for an all-solid battery system.

The invention relates to a method for restoring uranium contaminated soil by constructing a phytocoenosis community with bamboo willows, broad leaf paspalum and macleaya cordata. The arbor bamboo willows, herbaceous plant broad leaf paspalum and macleaya cordata which have an enrichment effect on uranium in the soil are selected and arranged according to a composite triangle, and the stable phytocoenosis community with an in-situ restoration function on the uranium contaminated soil is constructed. Plants in the phytocoenosis community enrich uranium from the uranium contaminated soil, uraniumis transported to the overground part of the plants, thereby achieving the purpose of restoring the uranium contaminated soil. The disadvantages of the monotonous plant species structure, poor stability, low soil fertility, smaller total enrichment amount and low ecological function of an existing plant restoration technology for restoring the uranium contaminated soil with the single plant population are overcome, the synergistic effect exists among the three plants, and compared with a method for restoring the uranium contaminated soil with the single plant population, the restoration efficiency is significantly improved.

The invention discloses a method for promoting safe utilization of pig farm waste through earthworm-quick growing tree species. Circulating application of pig manure, biogas slurry and composite earthworms is conducted in the quick growing forest land in different seasons, and the method comprises the following operation steps that firstly, the quick growing tree species are planted; secondly, the pig manure is applied, ring-shaped ditches are dug around the planted quick growing tree species, and the pig manure is scattered into the ditches; thirdly, biogas slurry is applied, and a pipeline for biogas slurry irrigation is laid beside the quick growing tree species, drop irrigation ports are formed in the left side and the right side, and the biogas slurry is subjected to drop scattering according to situations; and fourthly, the earthworms are applied, ring-shaped ditches are dug in an area where the pig manure is applied in the second step, the big earthworms and the small earthworms are evenly placed in the ditches, then soil returning and filling are conducted, and then the process can be completed. The anthocephalus macrophyllus planted through the method is vigorous in growth, the wood forming period is short, and economical and ecological benefits are obvious.

This invention relates to a method for synthesizing suspension-deformable polyacrylamide that can be used to adjust the stratum injection profile to increase crude oil productivity after second and third oil production. The method comprises: mixing acrylamide 20-30%, 3,5-diacryloyloxyethyl-benzenesulfonic acid 2-8%, and desalted water as balance, adding catalysts potassium persulfate 5-10 ppm and sodium bisulfate 5-10 ppm, and polymerizing at 0-15 deg.C to obtain polyacrylamide. Polyacrylamide thus synthesized has high salt resistance, which is not limited by the mineralization degree of speed are adjustable according to the spot conditions. The colloid particles have certain solubility and viscosity in aqueous solution, thus can be uniformly suspended in the solution without any volume change when contacting oil. When absorbing water, the colloid particles expand and turn soft. Under the action of outside force, the colloid particles can deform, and the deformation is reversible. The polyacrylamide can change the underground pressure field and flow field driven by water flow, thus can adjust the stratum injection profile. The polyacrylamide is suitable for bulk polymerization in kettle.

The invention provides a method for relieving toxicity of cadmium stress to hydrocotyle verticillata, which comprises the following steps: selecting hydrocotyle verticillata plants which are free of scars and good in growth vigor, cleaning soil at the roots by using tap water, and then rinsing the hydrocotyle verticillata plants for multiple times by using deionized water; selecting plants with approximate biomass and plant height for pre-culture; according to the pre-culture result, selecting and transplanting plants with consistent growth vigor into a cadmium solution added with exogenous sulfur for culture; and placing the plants under natural conditions with smooth ventilation and sufficient illumination for continuous aeration culture for 24 hours. By means of the method, the toxicity of cadmium stress to the hydrocotyle verticillata can be effectively relieved, and the biomass of the hydrocotyle verticillata can be improved.

The invention discloses a receiving circuit of a laser range finder. The receiving circuit comprises a first power supply, a second power supply, first to tenth capacitors, first to seventeenth resistors, first to fourth triodes, first to fourth diodes, a first inductor and a second inductor. The receiving circuit is simple in structure, low in cost and high in amplification factor which is about 12,000 times, the bandwidth ranges from 0.5 MHz to 14 MHz, the output impedance is reduced, the transmission coefficient for low load impedance is increased, the directivity is high, energy consumption is low, and the effective range is wider.