76results about How to "Improve the stability of action" patented technology

An organic positive temperature coefficient thermistor comprising a thermoplastic polymer matrix, a low-molecular organic compound having a melting point that is equal to or greater than 40 DEG C. and less than 100 DEG C. and conductive particles, each having spiky protuberances, is obtained by crosslinking a milled mixture of these components with a silane coupling agent comprising a vinyl group or a (meth)acryloyl group and an alkoxy group. This organic positive temperature coefficient thermistor has sufficiently low resistance at room temperature and a large rate of resistance change between an operating state and a non-operating state, and can be operated at less than 100 DEG C. with a reduced temperature vs. resistance curve hysteresis, ease of control of operating temperature, and high performance stability.

The organic positive temperature coefficient thermistor of the invention comprises a thermosetting polymer matrix, a low-molecular organic compound and conductive particles, each having spiky protuberances, and so can have sufficiently low room-temperature resistance and a large rate of resistance change between an operating state and a non-operating state. In addition, the thermistor can have a small temperature vs. resistance curve hysteresis with no NTC behavior after resistance increases, ease of control of operating temperature, and high performance stability.

The present invention relates to a permselective separation membrane that can be used in blood purifying treatment. More particularly, the present invention relates to a polysulfone-based permselective separation membrane which has well-balanced separation properties, highly stable safety and performance, and also can be smoothly assembled into a module, and a method for producing the same.

A compact, lightweight direct methanol fuel cell unit includes a circular membrane electrode assembly (MEA) having a cathode, a proton exchange membrane (PEM), and an anode, an air flow duct on the cathode side of the MEA, an annular fuel reservoir on the anode side of the MEA which contains a mixture of methanol and water as fuel, a carbon dioxide (CO.sub.2) relief valve communicating with the fuel reservoir, and a control unit. Due to the CO.sub.2 release mechanism, the fuel cell is completely self-sustaining without the need for a mechanical auxiliary system. Additionally, the control unit improves the stability of the fuel cell power output and the catalysis activity of the MEA. Another embodiment of the present invention is a direct methanol fuel cell system which incorporates a number of MEAs and a fuel cell reservoir. All the cathodic electrical terminals of the MEAs are serially connected together while they are electronically communicating with the control unit. The anodic electrical terminals similarly communicate electronically with the control unit. Higher power and voltage are thus attained while maintaining a compact size of the fuel cell system.

The invention provides an organic positive temperature coefficient thermistor comprising at least two polymer matrices, a low-molecular organic compound and a conductive particle having spiky protuberances. For the polymer matrices, at least two thermoplastic polymer matrices having varying melting points or at least one thermoplastic polymer matrix and at least one thermosetting polymer matrix are used. It is thus possible to provide an organic positive temperature coefficient thermistor which has sufficiently low room-temperature resistance and a large rate of resistance change between an operating state and a non-operating state, and can operate with a reduced temperature vs. resistance curve hysteresis, ease of control of operating temperature, and high performance stability.

Novel aqueous, acid etch solutions comprising a fluorinated surfactant are provided. The etch solutions are used with a wide variety of substrates, for example, in the etching of silicon oxide-containing substrates.

The present invention is directed to certain fluorinated surfactants, and use thereof in acid etch solutions, such as in aqueous buffered acid etch solutions. The etch solutions are used with a wide variety of substrates, for example, in the etching of silicon oxide-containing substrates.

A flexible nitrogen dioxide sensor based on tungsten trioxide nanoparticles-loaded multi-walled carbon nanotubes-reduced graphene oxide (WO3 NPs-loaded MWCNTs-RGO) hybrid on a polyimide / polyethylene terephthalate substrate. A viscous gel of the hybrid materials can be prepared by the assistance of α-terpineol. The fabricated sensor shows excellent sensing performance toward NO2 which may have a maximum response of 17% (to 5 ppm), a limit of detection of 1 ppm, and relatively short response / recovery time (7 / 15 min). The sensor may exhibit excellent mechanical flexibility and sensing properties at room temperature without any significant performance degradation even at a curvature angle of 90° and after 106 times of bending / relaxing processes. Low cost, light weight and mechanical robustness of the proposed WO3 NPs-MWCNTs-RGO hybrid based sensor can be a promising element for the development of flexible NO2 gas sensors having higher performance.

A vertical or short takeoff and landing (V / STOL) airplane is described having a vertical form factor. Making the airplane tall has many advantages when operating in hover mode close to the ground. Several variations of the design are described. The preferred embodiment consists of two tall fuselage2 structures having an airfoil shape in plan view. As high above the ground as practical a “lift wing” spans the space between these fuselages. This wing may be equipped with lift augmentation systems to facilitate V / STOL flight. In the center of the span on the leading edge of the lift wing is placed a turboprop engine. Alternatively, the wing and attached engine can be made to tilt about a horizontal axis. For takeoff the wing will be tilted skyward. A second wing slightly below and behind the lift wing has a pusher engine located on the trailing edge. This lower wing and engine is also able to tilt about a horizontal axis parallel to the lift wing. During takeoff this lower engine is pointed downward toward the ground. This lower wing contains aerodynamic control surfaces to provide attitude and position control. Subsequent to liftoff the wings and engines tilt into a horizontal position to provide cruise lift and thrust. At the end of the flight the wings and attached engines are tilted back to provide vertical lift for hover, maneuvering, and soft landing. 2 “Fuselage” is used here even though it substantially differs from the conventional fuselage (and its French origins meaning, “spindle shaped”) since in plan view it is an airfoil shape of large thickness. It will be used here for lack of a better word. Think of fuselage as meaning “where the pilot, passengers and cargo are located”.

This invention provides a new facilitated transport membrane comprising a relatively hydrophilic, very small pore, nanoporous support membrane, a hydrophilic polymer inside the very small nanopores on the skin layer surface of the support membrane, a thin, nonporous, hydrophilic polymer layer coated on the surface of the support membrane, and metal salts incorporated in the hydrophilic polymer layer coated on the surface of the support membrane and the hydrophilic polymer inside the very small nanopores, a method of making this membrane, and the use of this membrane for olefin / paraffin separations, particularly for C3= / C3 and C2= / C2 separations.

The present invention relates to a system for wireless communication comprising a first transceiver circuitry (BS) connected to a plurality of virtual antenna ports of an antenna arrangement; each virtual antenna port is a combination of one or more physical antenna ports. The first transceiver circuitry (BS) is configured to: communicate with a second transceiver circuitry (UE) via the antenna ports of the antenna arrangement; receive primary beamshaping information related to a first link (Downlink) between the first transceiver circuitry (BS) and the second transceiver circuitry (UE); determine secondary beamshaping information related to a second link (Uplink) between the second transceiver circuitry (UE) and the first transceiver circuitry (BS); and apply at least one weight vector based on the primary and secondary beamshaping information for subsequent transmission of signals from the first transceiver circuitry (BS) via the plurality of virtual antenna ports of the antenna arrangement.

The present invention concerns a catalyst for hydrotreating and / or hydroconverting heavy metal-containing hydrocarbon feeds, said catalyst comprising a support in the form of mainly irregular and non-spherical alumina-based agglomerates the specific shape of which results from a crushing step, and containing at least one catalytic metal or a compound of a catalytic metal from group VIB and / or group VIII (groups 8, 9 and 10 of the new periodic table notation), optionally at least one doping element selected from the group constituted by phosphorus, boron and silicon (or silica which does not form part of that which may be contained in the selected support) and halogens, said catalyst essentially being constituted by a plurality of juxtaposed agglomerates each formed by a plurality of acicular platelets, the platelets of each agglomerate generally being oriented radially with respect to each other and with respect to the centre of the agglomerate. The specific shape of the catalyst improves its performance when using it for hydroconverting / hydrotreating heavy metal-containing hydrocarbon feeds.The invention also concerns the use of said catalyst alone or as a mixture in a fixed bed or ebullated bed reactor.

Circuits for converting an input current to an output voltage that employs a uniquely biased common-gate or common-base stage as a current buffer and a direct drive of the current buffer output into an impedance to convert the current signal to a voltage signal.

Novel aqueous, acid etch solutions comprising a fluorinated surfactant are provided. The etch solutions are used with a wide variety of substrates, for example, in the etching of silicon oxide-containing substrates.

The invention discloses a data visualization method and a data visualization system based on a hierarchical model. The data visualization method comprises the following steps: graph data preparation, graph vertex sampling stratification, sub-graph vertex connection, graph vertex stress calculation, vertex position updating, graph layout recursive calculation, and graph layout hierarchical drawing. The data visualization system comprises a graph data preparation module, a graph vertex sampling stratification module, a sub-graph vertex connection module, a graph vertex stress calculation module, a vertex position updating module, a graph layout recursive calculation module, and a graph layout hierarchical drawing module. Algorithm convergence can be accelerated, the layout can be calculated correctly, and the effect stability is kept. In addition, graph layout of big data can be drawn scientifically, and convenient interactive operation is provided. Therefore, the data visualization method and the data visualization system have the advantage that beautiful layout can be calculated quickly and efficiently and users can be helped to mine the potential knowledge laws.

The invention provides a high permeance and high selectivity facilitated transport membrane comprising a very small pore, nanoporous polyethersulfone (PES) / polyvinylpyrrolidone (PVP) blend support membrane, a hydrophilic polymer inside the very small nanopores on the skin layer surface of the support membrane, a thin, nonporous, hydrophilic polymer layer coated on the surface of the support membrane, and metal salts incorporated in the hydrophilic polymer layer coated on the surface of the support membrane and the hydrophilic polymer inside the very small nanopores, a method of making this membrane, and the use of this membrane for olefin / paraffin separations, particularly for propylene / propane and ethylene / ethane separations.

A refueling facility (200) according to the present invention comprises a refueling source (210) for refueling a fuel cell vehicle with fuel, a power supply source (220) for supplying power to the fuel cell vehicle, and a controller (230) for controlling refueling and power supply from the refueling facility (200) to the fuel cell vehicle. The forward end of a refueling path (211) and that of a power supply path (221) are integrated into a supply connector (240). The refueling and the power supply are achieved by connecting the supply connector (240) to a fuel receptacle (110) of the fuel cell vehicle.

A class of materials has advantageous utility in electrocatalytic applications, e.g., fuel cells. The materials circumvent conventional Pt-based anode poisoning and the agglomeration / dissolution of supported catalysts during long-term operation by exploiting the unique physical and chemical properties of bulk metallic glass to create nanowires for electrocatalytic applications, e.g., fuel cell and battery applications. These amorphous metals can achieve unusual geometries and shapes along multiple length scales. The absence of crystallites, grain boundaries and dislocations in the amorphous structure of bulk metallic glasses results in a homogeneous and isotropic material down to the atomic scale, which displays very high strength, hardness, elastic strain limit and corrosion resistance. The melting temperatures of the disclosed bulk metallic glasses are much lower than the estimated melting temperatures based on interpolation of the alloy constituents making them attractive as highly malleable materials.

The invention broadly encompasses energy storage devices or systems and more specifically relates to methods of enhancing the performance of electrochemical double layer capacitors (EDLCs), or supercapacitors or ultracapacitors, and devices formed therefrom. In some embodiments, the invention relates generally to energy storage devices, such as EDLCs that use phosphonium-based electrolytes and methods for treating such devices to enhance their performance and operation. Embodiments of the invention further encompass phosphonium-based electrolytes comprised of phosphonium ionic liquids, salts, and compositions employed in such EDLCs.

A method for producing a meta-aramid fiber paper-based material includes steps of: adding functional powders into a first poly(m-phenylene isophthalamide) solution, and obtaining a homogeneous mixed solution; through a dry spinning method, obtaining meta-aramid chopped fibers; through a second poly(m-phenylene isophthalamide) solution, obtaining meta-aramid fibrids; processing the fibrids with a multi-stage classification, selecting the fibrids having an appropriate mesh number and combining in proportion; mixing the chopped fibers and the fibrids, and relieving until uniform; forming a paper through an ultralow concentration inclined wire forming machine with an ultrasonic process and a wet-papermaking process; after squeezing and drying, obtaining a meta-aramid fiber base paper, and then processing with surface coating; and, after multi-stage calendering, rewinding and slitting, obtaining the high-performance meta-aramid fiber paper-based material. The paper-based material has a thickness of 1.5-30 mil, a high whiteness, a smooth and even surface, excellent characteristics, and a good performance stability.

Novel aqueous, acid etch solutions comprising a fluorinated surfactant are provided. The etch solutions are used with a wide variety of substrates, for example, in the etching of silicon oxide-containing substrates.

The invention provides a modified cellulose nanofiber stable Pickering emulsion and a preparation method thereof. The preparation method of the modified cellulose nanofiber stable Pickering emulsion comprises the steps that modified cellulose nanofiber is added into deionized water and is dispersed uniformly, and modified cellulose nanofiber dispersion liquid with the mass fraction of 0.5-5% is formed; dodecane with the volume ratio to the deionized water of (0.1-9) to 1 is added into the dispersion liquid, an oil water mixture is formed, and the modified cellulose nanofiber stable Pickering emulsion is obtained through processing of a high-speed dispersion machine. The method is simple in preparation process, the cellulose nanofiber modified experiment condition is mild, poisonous solvents are not required, using materials are biologic materials, biocompatibility and renewability are achieved, and a green and environment-friendly nano-modification technology is achieved; and the prepared emulsion has the advantages of good stability, low cost, being environmental-friendly and the like, and important application value is achieved in the fields such as food and cosmetics.

Provided is an air purification treatment device under ionization and ultrasonic coupling effects. A first-stage treatment area of the air purification treatment device includes a pre-filter screen mounted at an air inlet; a second-stage treatment area includes a plasma reactor, a canvas and a dust collecting electrode; a third-stage treatment area includes a honeycomb-shaped activated carbon mounted close to an air outlet. A central processor is connected with an ultrasonic generator; the ultrasonic generator is controlled to work for a period of time each separated by a cycle by adopting a time cycle; an ultrasonic transducer is connected with the ultrasonic generator through an interface so as to be used for converting an electric signal generated by the ultrasonic generator into mechanical vibration; an ultrasonic amplitude-change pole is connected with the ultrasonic transducer so as to be used for converting the mechanical vibration into stable ultrasonic vibration. The air purification treatment device can remove dust and remove bacteria, and is suitable for families, hospitals, offices and other public places.

The present disclosure provides a sound absorbing material. The sound absorbing material comprises MFI-structural-type zeolite. The MFI-structural-type zeolite comprises a framework, and the framework comprises SiO2 and AlO3, and the mass ratio of Si to Al in the framework is less than 200 and not less than 50. The present disclosure also provides a speaker box applying the sound absorbing material. The sound absorbing material provided by the present disclosure and the speaker box using the sound absorbing material can further improve the performance of the speaker box, reduce the failure of zeolite and improve the performance stability of the speaker box.

The present invention provides an adulterated peanut oil detector and an adulterated peanut oil detection method, and pertains to the technical domain of product analysis. The detector comprises a casing, a LCD and Return key, Enter key, Up key, Down key, a power switch, a power socket, and a USB interface arranged on the casing, and a microprocessor and a power supply unit mounted in the casing and electrically connected to the components on the casing, wherein, a module cover is arranged on the top surface of the casing, and a pretreatment module and a detection module are mounted in the space under the module cover. The pretreatment module comprises a heating body and cuvette slots, and the detection module comprises an axial fan, a radiating plate, a refrigerating plate, and cuvette slots. The detection method comprises sample preheating procedure and slow refrigeration procedure. The detector and method provided in the present invention can quickly and easily detect whether the peanut oil sample is adulterated and the percentage of adulteration, and is applicable to quick on-spot detection of rapeseed oil, sunflower oil, maize oil, cotton oil, palm oil, and soybean oil, etc. admixed in peanut oil.

A method of operating a low pressure drop fuel cell stack comprising a plurality of low pressure drop fuel cells wherein during low pressure and low power operation, a heat transfer rate of a cathode flow field plate of each fuel cell is greater than a heat transfer rate of an anode flow field plate of the same fuel cell. Thus, a temperature gradient is created between an anode electrode and a cathode electrode of each fuel cell, as well as reactant fluids in at least one anode flow field and at least one cathode flow field of the same fuel cell.

The present invention relates to a docetaxel nanometer lipid injection. The invention also relates to a method for preparing the docetaxel nanometer lipid injection. The invention further relates to the application of the docetaxel nanometer lipid injection for preparing medicament for treating a tumor. The nanometer preparation of the invention is capable of prolonging the medicament action time, conveying the medicament with a target, reducing the administration dose under the precondition of ensuring the medicament action, alleviating or avoiding medicament toxin and side effects, improving the medicament action stability, and being benefited for the medicament storage, thus it is capable of implementing the development of the medicament which has advantages in the aspects of a high yield, automatization, large scale, low cost, convenient carry and storage, small dose and low side-effect.

A voltage regulator including a transconductance amplifying unit, a transresistance amplifying unit, a feedback unit, a differential amplifying unit, and a compensation capacitor. The transconductance amplifying unit includes two inputs for receiving a feedback voltage and a reference voltage, and includes an output for outputting a current. The transresistance amplifying unit includes an input for receiving the current, and transforming the current into an output voltage. The feedback unit generates the feedback voltage with reference to the output voltage. The differential amplifying unit includes two inputs for receiving the feedback voltage and the reference voltage, and includes an output for outputting a differential voltage. The compensation capacitor is coupled between the output of the differential amplifying unit and the input of the transresistance amplifying unit.