78results about How to "Easy to control accurately" patented technology

A reduced area imaging device is provided for use in medical or dental instruments such as an endoscope. The imaging device is provided in various configurations, and connections between the imaging device elements and a video display may be achieved by wired or wireless connections. A connector assembly located near the imaging device interconnects the imaging device to an image/power cable extending through the endoscope. The connector provides strain relief and stabilization for electrically interconnecting the imager to the cable. The connector also serves as the structure for anchoring the distal ends of steering wires extending through the body of the endoscopic device. The connector includes a strain relief member mounted over a body of the connector. The connector allows a steering wire capability without enlarging the profile of the distal tip of the endoscopic device.

A pump system selectably and dynamically controls the flow rate of a fluid being delivered to a patient's body over a wide range of flow rates. The pump system includes an infusion tubing, a pumping mechanism, a motor drive assembly in mechanical communication with the pumping mechanism, a user input control, and an electronic controller in electrical communication with and at least partially controlling the motor drive assembly. The electronic controller include a digital signal processing controller in electrical communication with the motor drive assembly that is configured to receive a signal from the user input control and to cause power to be supplied to the motor drive assembly in response at least partially to the signal from the user input control. The pump system may selectably deliver fluid at rates from about 1 milliliter per hour to at least about 3000 milliliters per minute.

A heat exchange system selectably controls the temperature of a fluid being delivered to a patient's body by a pump device. The heat exchange system includes a thermal element and a heat exchanger that is removably coupled under pressure to the thermal element. The heat exchanger includes a first half made from thermally conductive material that correspondingly mates with the thermal element, a second half made from thermally conductive material opposite the first half, and an internal heat exchange zone existing between the first half and the second half, wherein fluid flows therethrough. The thermal element of the heat exchange system may controllably and safely warm and/or cool the fluid prior to delivery.

A pump system selectably controls the temperature, flow rate, flow volume, and flow pressure of a fluid being infused into a patient's body. The pump system includes a cartridge and components that removably connect with a pump housing and corresponding components, providing simple attachment of the cartridge to the pump housing. The pump housing includes a pressure sensor, a bubble detector, and a temperature sensor on a first side of the pump housing, and an engaging actuator and a central controller. The cartridge includes on a first side a heat exchanger, a pressure receptor correspondingly aligned with the pressure sensor, and a detector interface correspondingly aligned with the bubble detector and temperature sensor. Upon aligning the cartridge with the pump housing and actuating the engaging actuator, the pressure receptor communicates with the pressure sensor and the detector interface aligns with the bubble detector and temperature sensor.

A pump system simply and selectably controls the temperature, flow rate flow volume, and flow pressure of a fluid being infused into a patient's body. The pump system a includes a central controller and user inputs that allow for simple selection and efficient operation of the pump system, which includes manually or automatically priming the pump system to remove air, selectably controlling and rapidly adjusting the flow rate over a wide range, selectably and safely controlling the pump system temperature controls, and selectably controlling the flow pressure during delivery. The pump system includes a pump housing with a central controller and a cartridge with infusion tubing removably coupled to the pump housing.

The invention relates to a method for preparing a load type high-dispersion multi-component precious metal nanoparticle catalyst. The method comprises the steps of 1) under inert atmosphere, uniformly stirring a solvent and a surface active agent, then adding a precious metal precursor solution, rising the temperature, reacting for a certain period of time, cooling to the room temperature, adding normal hexane, and performing extraction layering; 2) uniformly mixing the obtained upper layer nanoparticle solution with a carrier, and stirring or performing ultrasonic treatment; and 3) centrifugating, washing and drying or baking the mixed solution to obtain the catalyst. For the precious metal catalyst, even under a relatively high carrying amount, relatively good precious metal nanoparticle dispersion degree can be still guaranteed; the particle sizes of the particles are uniformly distributed; the precious metal carrying amount is controlled easily and accurately; the particle sizes and the components of multi-component particles can be controlled; and the catalysis application range is wide. The process is simple; the preparation cost is low; the applicability is high; and load-type high-dispersion precious metal and the multi-component precious metal nanoparticle catalyst can be prepared in a large scale.

This invention relates to method of forming a thin film on a substrate in a reaction chamber by an atomic layer deposition process comprising a plurality of individual cycles. The plurality of individual cycles comprise at least two groupings of individual cycles. The individual cycles comprise (i) introducing a gaseous metal containing precursor into the reaction chamber and exposing the substrate to the gaseous metal containing precursor, wherein at least a portion of the metal containing precursor is chemisorbed onto the surface of the substrate to form a monolayer thereon, (ii) stopping introduction of the metal containing precursor and purging the volume of the reaction chamber; (iii) introducing a gaseous oxygen source compound into the reaction chamber and exposing the monolayer to the gaseous oxygen source compound, wherein at least a portion of the oxygen source compound chemically reacts with the monolayer; and (iv) stopping introduction of the oxygen source compound and purging the volume of the reaction chamber. The method involves repeating the individual cycles until a thin film of desired thickness is obtained. The method also involves carrying out at least two groupings of individual cycles at different process conditions. The methods are useful for producing a thin film on a semiconductor substrate, particularly metal containing thin films for electrode applications in microelectronics.

The invention relates to a method for inducing in vitro human medulla mesenchymal stem cells to be divided into islet-like cells, comprising four inducing methods for dividing the human medulla mesenchymal stem cells into islet-like cells, wherein the main inducing liquid firstly adopts porcine fetal pancreas extracting solution and the inducing ingredients of zinc acetate, and the secretory volume of insulin which is divided into the islet-like cells is remarkably improved. The islet-like cells obtained by the method are possible to break through the current technical problem of diabetes mellitus and are suitable for experimental research and future large-scale production.

The invention relates to a composite negative electrode material and a preparation method therefor and a lithium ion battery. The composite negative electrode material comprises a carbonaceous material with an embedding structure and formed by embedding first carbon component small particles into a second carbon component framework carrier, wherein the first carbon component is converted by a small particle precursor (green coke and/or burning coke and/or carbon microspheres); and the second carbon component framework carrier is converted by a binder. The composite negative electrode materialdisclosed in the invention combines the "embedding type" structure and a "gradient type crystal form" structure; the small particles of different appearances are embedded in the relatively thick framework carrier to form a bigger particle; the small particles embedded in the interior adopt a graphite structure with the best crystal form; the framework carrier adopts a graphite structure with the ordinary crystal form; and the outermost layer also can be coated with an amorphous carbon structure with the worst crystal form. The composite negative electrode material provided by the invention hasstructural stability, high orientation, low expansion, high rate capability, excellent liquid absorption performance and cycle performance, and can satisfy various kinds of demands in the application.

The invention provides a chemical vapor deposition (CVD) device. The device comprises a reaction chamber, a cooling device, a spraying assembly arranged at the top of the reaction chamber and a base arranged opposite to the spraying assembly, wherein the base is provided with a heating unit; the spraying assembly comprises a first gas inlet device and a second gas inlet device which are respectively used for transmitting first gases and second gases to a reaction zone between the base and the spraying assembly; the cooling device and the first gas inlet device are stacked; the cooling device and the second gas inlet device are stacked; the first gas inlet device and the second gas inlet device are arranged side by side; the thermal conductivity of the first gas inlet device is greater than that of the second gas inlet device; and in the heating process of the heating unit, the first gas inlet device and the second gas inlet device have different temperatures. The device can provide different temperatures for gases in different gas inlet devices.

The invention discloses a micro leveling mechanism of a projection objective of a lithography machine, and belongs to the technical field of projection lithography. The mechanism mainly consists of a mounting substrate, three support adjusting lever mechanisms, mounting pieces and fixing pieces, wherein each support adjusting lever mechanism consists of a lever mounting base, an adjusting lever, an adjusting screw, a shaft, a shaft end cover, a pre-tightening spring, an adjusting screw and the like; and the lever mounting bases of the support adjusting lever mechanisms are fixed with the mounting substrate through the fixing pieces, and objective flanges are connected with the front ends of the adjusting levers through the mounting pieces. The micro leveling mechanism is uniformly distributed on the edge of an objective in a three-point support mode; through the support adjusting lever mechanisms, not only the precision of thread adjustment can be improved, but also the load borne on threads can be reduced; and the amplification factors of the levers can be set according to different precision requirements.

The invention discloses an MEMS (micro electro mechanical system) optical scanning probe capable of switching work modes. The MEMS optical scanning probe comprises a case and a main body base assembled in the case, wherein a lens assembly is arranged in a groove formed in the upper side of the main body base, a first MEMS micro lens is arranged in a groove of the slope surface of the main body base, a second MEMS micro lens is arranged in a groove formed in the lower side of the main body base, light beams are emitted onto the first MEMS micro lens through a lens assembly via optical fibers and are then reflected onto the second MEMS micro lens through the first MEMS micro lens, an external circuit controls the on-off state of the voltage on the second MEMS micro lens, further, the second MEMS micro lens is controlled to be in the in-space tilting or in-space flat expanding state for realizing the free switching among the forward scanning, the lateral scanning and the lateral forward scanning of the probe. The MEMS optical scanning probe has the advantages that the probe only adopts one lens assembly, so the double MEMS micro lenses can realize the switching of various work modes, and the use is more flexible.

The invention discloses a time-varying compensation control system for damper mechanical characteristics of a magnetorheological semi-active suspension and a construction method of the time-varying compensation control system. The output ends of a sprung mass acceleration sensor and a wheel mass acceleration sensor are connected to an extended Kalman filter, and the output end of the extended Kalman filter is connected to a soft-constraint Taylor series LQG time-delay compensation controller. The soft-constraint Taylor series LQG time-delay compensation controller is connected with a time-delay compensation prediction controller and a semi-active power acquisition controller separately, and the time-delay compensation prediction controller is connected to the input end of the soft-constraint Taylor series LQG time-delay compensation controller. The semi-active power acquisition controller is connected with the extended Kalman filter and a control current solution controller separately,the control current solution controller is connected to a numerical control current source to realize the compensation control over damper response time delay and mechanical characteristic time variation of the magnetorheological semi-active suspension, the situation that a hard-constraint Taylor series LQG time-delay compensation control method directly utilizes a saturation function to performhard constraint on the predictive control force can be avoided, and thus a more ideal time-delay compensation control effect can be achieved.

The invention discloses an equivalent replacement Taylor series LQG time-delay compensation control system of a magnetorheological semi-active suspension and a construction method of the equivalent replacement Taylor series LQG time-delay compensation control system. The output ends of a sprung mass acceleration sensor and a wheel mass acceleration sensor are connected to an extended Kalman filter, and the output end of the extended Kalman filter is connected to an equivalent replacement Taylor series LQG time-delay compensation controller. The equivalent replacement Taylor series LQG time-delay compensation controller is connected with a time-delay compensation prediction controller and a semi-active power acquisition controller separately, and the time-delay compensation prediction controller is connected to the input end of the equivalent replacement Taylor series LQG time-delay compensation controller. The semi-active power acquisition controller is connected with the extended Kalman filter and a control current solution controller separately, and the control current solution controller is connected to a numerical control current source to realize the compensation control overdamper response time delay and mechanical characteristic time variation of the magnetorheological semi-active suspension. Through the equivalent replacement Taylor series LQG time-delay compensation control, the comprehensive performance index of the suspension can be accurately tracked, and thus a more ideal time-delay compensation control effect can be obtained.

The invention relates to a quadrangle feeding-based dual-layer waveguide gap near-field focusing array antenna, and relates to a waveguide gap antenna. The quadrangle feeding-based dual-layer waveguide gap near-field focusing array antenna comprises a lower-layer feeding waveguide and an upper-layer radiation waveguide, an incident wave sequentially passes through the feeding waveguide, a couplinggap and the radiation waveguide from a feeding port and is finally radiated to an external space by a radiation gap, the feeding port and the feeding waveguide are fed through a central hole from a back surface by employing a standard feeding wave, quadrangle feeding is employed to substitute traditional central feeding, a signal is extended to four antenna angles from the center by the feeding waveguide with four arms, uniform-amplitude and same-direction feeding is performed from two ends to a middle part, a PMC boundary can be formed in the center of the feeding waveguide, thus, a metal boundary is substituted, the size is reduced, and the design cost is reduced. The length of the feeding waveguide is 44.8 millimeters, the width of the feeding waveguide is 5 millimeters, and the heightof the feeding waveguide is 2 millimeters.

The invention discloses a bionic S-shaped moving robot. The bionic S-shaped moving robot comprises a head, a tail and a plurality of unit modules connected between the head and the tail in series, theadjacent two unit modules are elastically connected, each unit module comprises a shell, a sliding block arranged in the shell in the form capable of reciprocating sliding, a electromagnet used for absorbing the sliding block to slide, and a winding amplification mechanism connected between the sliding block and the shells of the adjacent unit modules, and the winding amplification mechanism comprises a sliding block winding column fixed on the sliding block, a shell winding column fixed on the shell, and a line rope wound between the shell winding column and the sliding block winding columnand forming a closed loop by penetrating through the shells of the adjacent unit modules. The bionic S-shaped moving robot overcomes the shortcoming of small electromagnetic iron action distance through a rope amplification mechanism, and has the advantages that the control is simple, the miniaturization is achieved, and the pure electromagnetic drive is achieved.

The invention relates to a taurine-containing ophthalmic in-vivo gel preparation and a preparation method thereof. The taurine-containing ophthalmic gel is an ophthalmic preparation which is in a liquid state in vitro and forms a gel state after dropped into eyes. The taurine-containing ophthalmic gel is prepared by taking taurine as an active substance and supplementing a gel adjuvant, a thickening agent, a preservative, an osmotic-pressure conditioning agent, a pH conditioning agent and water for injection. The taurine-containing ophthalmic gel is suitable for treatment of diseases such as retinopathy and the like; and the ophthalmic gel is in the liquid state in vitro, a dosage is easy and accurate to control, the use is convenient, the ophthalmic gel can be uniformly spread after dropped into the eyes, gelates, is retained in the eyes for longer time and is not prone to loss, effective drug concentration can be effectively maintained, the treatment effect is enhanced, further, the toxicity is low, the irritation is small, the biocompatibility is good, and the taurine-containing ophthalmic gel is effective, facilitates clinical application, and has a wide development prospect.

The invention discloses a medical purpose of an NMDA acceptor antagonist and a pharmaceutical composition thereof. The invention concretely discloses a medicine for using the NMDA acceptor antagonist, a pharmaceutically acceptable salt or a pharmaceutical composition thereof for treating or preventing central nervous system disease and/or mental diseases, and the NMDA acceptor antagonist is delivered to a human central nervous system through target administration. An application of the pharmaceutical composition can increase the concentration of the NMDA acceptor antagonist in brain tissue, medicine amount is greatly reduced, and systematic side effect is reduced; biology availability in the brain is high, autonomous drug administration can be carried out by patients, no pain is generated, usage is convenient, and thus the pharmaceutical composition has good patient compliance, and has wide clinical medical science application.

The invention discloses a cationic polymer and a preparation method thereof, and an anionic exchange membrane and a preparation method thereof. The cationic polymer has a structural formula as shown in a formula I. In the formula I, Q is a quaternary ammonium group; Ar is a group with aromatic rings included in two ends of the main chain; and n is an integer in a range of 10 to 150. The preparation method for the cationic polymer comprises the following steps: under the protection of inert gas, mixing quaternary ammonium monomer, aryl monomer and trifluoromethanesulfonic acid, carrying out reaction at 0 to 60 DEG C for 1 to 24 hours, then adding the obtained reaction liquid into ice water, and collecting precipitate so as to obtain the cationic polymer. According to the invention, the main chain of the cationic polymer is mainly composed of benzene rings, which enables the prepared anionic exchange membrane to have good mechanical properties, and the side chain of the cationic polymer contains cationic groups (quaternary ammonium groups) which have high alkali resistance; meanwhile, the cationic polymer is simple to synthesize, has controllable ionic group content and can be applied to production of the anionic exchange membrane with good mechanical properties, high conductivity and strong alkali resistance.

In a system and method for the reduction of nitrogen oxides in the exhaust of an internal combustion engine, the exhaust line of the internal combustion engine contains a DeNOx catalytic converter, in which the nitrogen oxides are reduced by means of hydrogen that is produced on-board the vehicle. The DeNOx catalytic converter is incorporated into a temperature-controlled heat exchanger, allowing the DeNOx catalytic converter to be operated within a desired temperature range, thereby improving the level of conversion.

The invention relates to a method for exhaust aftertreatment of an internal combustion engine with at least one combustion chamber and an outlet that is connected to an exhaust system, wherein at least one catalytic converter is arranged in the exhaust system. Furthermore, a secondary-air system is provided with which secondary air can be introduced into an exhaust duct of the exhaust system at an intake point downstream from the outlet of the internal combustion engine and upstream from the catalytic converter, and a first lambda sensor is arranged in the exhaust duct downstream from the intake point and upstream from the catalytic converter. The internal combustion engine is operated immediately after start-up with a substoichiometric combustion air ratio (λ E<1), and secondary air is introduced into the exhaust duct of the exhaust system downstream from an outlet of the internal combustion engine and upstream from the first lambda sensor. An exhaust-gas lambda is determined by the first lambda sensor and a stoichiometric exhaust-gas lambda (λ m=1) set, with the quantity of secondary air being maintained constant and the quantity of fuel being adjusted such that the stoichiometric exhaust-gas lambda (λ m=1) is achieved.

The present invention relates to a heater block and a substrate treatment apparatus, and more particularly to a heater block to perform heat treatment on a substrate and a substrate treatment apparatus having the same. According to embodiments of the present invention, it is provided a heater block for a substrate treatment apparatus having heating lamps on its one side to transfer heat to a target subjected to heat treatment, the heating lamps having different arrangement patterns in a plurality of regions on said one side.