1340results about How to "Stability is not affected" patented technology

Tool force information is provided to a user of a telesurgical system using an alternative modality other than force reflection on a master manipulator, such as providing the information on user-visible, user-audible, or haptic “buzz” or “viscosity” indicators, so as to allow expanded processing, including amplification, of the information, while not significantly affecting the stability of the telesurgical system or any closed-loop control systems in the telesurgical system.

The invention relates to a bidirectionally isolating type series resonance DC/DC converter (100) which comprises voltage-stabilizing capacitors (22, 32), high-frequency converters (20, 50), series resonance circuits (30, 40), a high-frequency transformer (28) and an energy storage unit (60), wherein the voltage-stabilizing capacitors (22, 32) are used for enhancing the stability of a DC voltage; the high-frequency converters (20, 50) have the same structure and comprise four switching elements inversely connected in parallel with a rapid diode and can be used for inversion and rectification; the series resonance circuits are used for converting three kinds of discrete levels output by corresponding high-frequency converters into sinusoidal waveforms and can be used for softly switching the switching elements of the corresponding high-frequency converters, at the same time, only one series resonance circuit (30 or 40) acts; and the high-frequency transformer (28) can be used for isolation and transformation. The transformer (100) can be used for greatly converting the DC voltage, has high efficiency, and can be applied to an electric vehicle power supply, standby power supplies of large-scale equipment, and the like.

The invention relates to a flexible satellite locus linearization attitude control method based on a disturbance observer. The invention aims at solving problems that a single locus linearization control method is poor in capability of inhibiting interference, is poorer in robustness, and does not consider external interference and the impact from flexible accessories. The method comprises the steps: employing Euler angles for describing attitudes of a spacecraft, employing an idea of equivalent disturbance, and building a flexible spacecraft dynamics and kinetics equation; solving the pseudo-inverse of a controlled object under the condition of neglecting equivalent disturbance, designing a quasi-differentiator of a specific type, and obtaining the nominal control of an expected locus; and designing a linear time varying adjuster through proportion-integration control. The method gives consideration to the influence of equivalent disturbance, designs the disturbance observer, and guarantees the asymptotic convergence of a tracking error of a flexible spacecraft. The method improves the anti-interference capability of a system, and improves the robustness of the system. The method is used in the attitude control field of flexible satellites.

Compound spinal rods function as part of the dynamic stabilization prosthesis to provide load sharing with motion preservation as part of a dynamic stabilization prosthesis. Compound spinal rods are used to span from one vertebra to an adjacent vertebra. Compound spinal rods include a first rod connected by a linkage to a second rod. The linkage allows for movement of the first rod relative to the second rod. The movement permitted by the compound spinal rod is designed to enhance the ability of a dynamic stabilization prosthesis to more closely approximate the natural kinematics of the spine without impairing stabilization of the spine.

The invention discloses one-component transparent waterborne polyurethane emulsion waterproof paint and a preparation method thereof and relates to polyurethane waterproof paint. The waterproof paint comprises a resin phase and a nano-material phase. The preparation method comprises the following steps: diol and a hydrophilic chain extender are dried, and other prepolymerization monomers are dried; diol, diisocyanate, fluorine-containing acrylate monomers and hydroxyl-terminated siloxane after a dehydration process are added to a four-neck flask, the mixture is heated and added with an organic tin initiator for a reaction under the protection of nitrogen, and the mixture is heated and added with dimethylolpropionic acid for continuous reaction; after a reaction system is cooled, the chain extender and acrylate monomers are added for a reaction; after a prepolymer is cooled to the temperature lower than the room temperature, a neutralizer and a cross-linking agent are added; then deionized water is added for emulsification, and mixed liquor A is obtained; a silane coupling agent is dissolved in absolute ethyl alcohol, silica microspheres are added to absolute ethyl alcohol, and mixed liquor B is obtained; the mixed liquor B is added to the mixed liquor A, the mixture is heated, and a radical initiator is added for a reaction; an organic solvent is removed, and the one-component transparent waterborne polyurethane emulsion waterproof paint is obtained.

A portable and collapsible table structure comprises a tabletop, a table frame, and a plurality of folding legs pivotally attached to the table frame. The tabletop is independently collapsed to a bundled condition, for example, by folding or rolling. Similarly, the table frame and the folding legs are collapsed so as to minimize the amount of space taken up by the collapsed and bundled table frame and legs. The bundled tabletop and the collapsed table frame and legs can be further bundled or packed together for transport and/or storage. The table frame comprises adjustable members that permit the size and footprint of the table frame to be expanded to multiple usable table sizes without compromising the size of the collapsed and bundled table. The folding legs may be adjustable to reduce the size taken up by the legs in the compressed and bundled condition of the table.

The invention relates to a bispecific antibody or antibody mixture, and more specifically relates to the bispecific antibody or the antibody mixture having a common light chain, and a preparation method of the bispecific antibody or the antibody mixture. The invention also relates to nucleic acid molecules for coding the bispecific antibody or the antibody mixture, a recombinant vector containing the nucleic acid molecules and recombinant cells, and a detection and quantification method for the bispecific antibody or the antibody mixture. The bispecific antibody or the antibody mixture is prepared by a common light chain technology, the preparation method is simple and controllable, mismatching of the light chains in the bispecific antibody can be avoided, the antibody mixture can be expressed in same host cell, difficulty for culturing the mixed cell groups is reduced, and the amplification production is easily achieved.

The invention provides a rubber conductive particle, comprising a rubber base material and metal plated film on the surface of the particle. The metal plated film can comprise one layer or a plurality of layers, and has a total thickness of 0.05mum to 1mm. The rubber conductive particle has a cylindrical shape or a platform shape, has a cross section of a circular shape, an elliptical shape, or a polygon shape, and has a cross section diameter of 1mm to 10mm. The preparation method of the rubber conductive particle comprises: first preparing a rubber sheet material with moulding, injecting, extruding, or calendering methods; then plating the metal plated film on the surface of the rubber sheet material by employing plating technique; and carrying out punching, shearing or laser cutting on the sheet material to obtain the rubber conductive particle. The rubber conductive particle of the invention is characterized by good conductivity of metal coating, thin thickness of the coating, reduction of raw material consumption, low manufacturing cost, and no pollution basically, and can be used as a conduction contact component of a push-button circuit board.

An internal combustion engine includes an exhaust valve for removing exhaust gas from a combustion chamber and an engine braking device with a hydraulic valve control unit by which the exhaust valve is held in an intermediate open position when the engine braking device is actuated. The internal combustion engine includes a hydraulic valve lash compensation mechanism for the exhaust valve and a control channel formed between the hydraulic valve control unit and an oil feed channel for feeding oil to the hydraulic valve control unit which can be closed by a closure element to compensate for valve lash of the exhaust valve. A counter-holder is constructed as a piston-cylinder unit that forms a variable stop for a valve bridge cooperating with the valve lash compensation mechanism.

The invention discloses a modified self-insulating composite external wall material, and belongs to a gypsum building material. The material comprises the following components in percentage by weight: 75 to 84 percent of gel material, 0.2 to 1.5 percent of heat insulating material, 3 to 6 percent of modifying agent and 12 to 18 percent of water; the gel material consists of gypsum, fly ash, cement and lime, wherein the gypsum and the fly ash are in the majority; the heat insulating material is one or more of polyphenyl granules, rice hulls, straws, saw dust and expanded perlite; and the modifying agent is a common salt compound or a mixture of the common salt compound, aluminum powder and polyvinyl chloride (PVC) latex powder. The external wall material for manufacturing external wall building blocks or external wallboards by optimized proportion and modification treatment remarkably improves the comprehensive performance of water prevention, heat insulation, shock resistance and pressure resistance; and production and construction are convenient, the raw materials are easily obtained, industrial and agricultural byproducts are fully utilized, and environmentally-friendly and energy-saving requirements are met.

The invention provides a method for controlling a servo system of an active disturbance rejection control technology, and aims to provide a method which has a simple algorithm, wide parameter adaptability and small servo system tracking dynamic error, and keeps the disturbance rejection capability of an automatic disturbance rejection controller (ADRC) control system. The method is realized through the following technical scheme that: firstly, a command differentiator ComD is substituted for a tracking differentiator TD which is arranged for a transition process of a standard active disturbance rejection control algorithm, and extracts a new location command value w1, a new speed command value w2 and a new acceleration command value w3; an extended state observer ESO in the standard active disturbance rejection control algorithm is continuously adopted, and calculates a system location observation value z1, a speed observation value z2 and an acceleration observation value z3; and w1 and z1 form a location error e1, w2 and z2 form a speed error e2, e1 and e2 are sent to a nonlinear state error feedback regulator (NLSEF), w3 and the output u0 of the NLSEF are added, w3 is taken as a feedback value, so the servo system of the improved active disturbance rejection control technology is formed.

A collapsible chair is described, comprising a carrying frame which receives a covering (4) for a hood-like windshield and is made of support frames (1) mutually swivelable between a storage position and a sitting position and forming a foot part (1). In order to provide advantageous constructional conditions it is proposed that the frame structure comprises at least four support frames (1) whose frame planes extending transversally to the base intersect each other in the region of a central axis (5), that the support frames (1) form a tensioning bracket (3, 3a) for the covering (4) starting from the outside of the foot part (2), which bracket acts upon two directly adjacent tensioning brackets (3a) releasing an access opening (10) between themselves, and that the foot parts (2) and tensioning brackets (3, 3a) are linked to each other in the region of the central axis (5).

A process for preparing the single-mode optical fibre with low polarization mode dispension features that a kneading system installed at downstream of drawing tower has a kneading wheel whose axis is periodically swinging in the plane parallel to drawing direction, and when the keading wheel is driven by high-speed moving optical fibre to show an angle, the generated torsion is transmitted to the softened glass body at upstream to generate the plastic deformation and solidify it in optical fibre, resulting in disordered non-sine torsion distribution to lower the polarization mode dispersion.

The invention discloses a miniaturized universal platform for preprocessing remote-sensing satellite data. Hardware equipment of the platform comprises a common PC (Personal Computer) server, an NFS (Network File System) storage system and decompression equipment among which communication is carried out by an Ethernet; a basic structure of the platform comprises an inner core layer, a module layer and a service layer; the common PC server comprises a management node and a processing node; the inner core layer and the service layer are deployed on the management node; the module layer is deployed in the NFS storage system; the decompression equipment outputs a signal to a demodulator to carry out data format decompression processing; the module layer comprises various data processing algorithms of remote-sensing satellites and the data processing algorithms operate on the processing node when being called; the service layer analyzes an XML (Extensible Markup Language) file which is input from outside and describes the processing flow of the remote-sensing satellites to be processed, selects the algorithms suitable for data processing of the satellites from the module layer and carries out service logic combination on the algorithms; and the inner core layer calls the corresponding algorithms in the module layer according to the service logic relation, carries out data processing on data output by the decompression equipment and generates needed data products.

The invention discloses a current/frequency conversion circuit, which comprises an integrator, a logic control circuit, a constant current source, an analog electronic switch and a temperature compensation circuit, wherein the input end of the integrator is connected to the input current, and the output end of the integrator is connected to the logic control circuit; the control signal output endof the logic control circuit is connected to the analog electronic switch, and the logic control circuit is further provided with a digital output end used for outputting a digital pulse frequency anda clock input end used for inputting an external clock; one end of the analog electronic switch is connected to the output end of the constant current source, and the other end of the analog electronic switch is connected to the input end of the integrator; and the temperature compensation circuit is connected to an adjusting port of the constant current source. The reference voltage is directlychanged through the temperature compensation circuit, so that the output of the constant current source is changed, the temperature change of the whole circuit is compensated, and the current/frequency conversion circuit is good in temperature coefficient. The temperature coefficient of the circuit is greatly improved without depending on an index of a single device. Meanwhile, the line structureis simple and the stability of a converter cannot be affected.

The invention discloses a database operation method and a device. The method comprises the steps of receiving a structured query language (SQL) text, judging whether SQL sentences in the SQL text is predefined SQL sentences in predefined SQL grammar, wherein the predefined SQL sentences in the predefined SQL grammar and corresponding original SQL sentences in original SQL grammar correspond to the same execution plan, if the SQL sentences are the predefined SQL sentences in the predefined SQL grammar, inquiring an execution plan bond by the SQL sentences in a corresponding relation table of the predefined SQL sentences and execution plans, executing the execution plan, and returning a corresponding result to a client side. The database operation method has generality and is free of affecting stability of a database system.

The invention provides a concrete anti-cracking repairing agent and concrete applying the same. The repairing agent includes: 20-40% of calcium oxide, 15-50% of micro-silicon powder, 10-20% of bentonite, 5-15% of calcium hydrogen phosphate, 1-5% of lithium carbonate, 1-5% of a surface modification agent, and 0.1-2% of fiber. The components are simple. By controlling stress dispersion, regulating a hydration process, controlling crack generation during construction, and improving the reaction activity of an unhydrated gel material, a gel material hydrate can form under certain conditions so as to achieve anti-permeability and self-repair function of concrete cracks. The compressive strength and impervious grade of doped concrete are greatly improved, and the number of cracks also declines. Also, when the anti-cracking repairing agent is applied in concrete, the doping amount only accounts for 1-2% of the mass of the gel material.

Provided is an on-line identification method for unbalance of a magnetic suspension rotor based on current test mass. First, a mathematical model of static and dynamic unbalance of the rotor is established, then at rated rotating speed, a current transformer measures a current of a magnetic bearing coil, and a displacement sensor measures the displacement of a radial channel of the magnetic suspension rotor; secondly, the rotating speed is kept unchanged, a test mass current is added for the first time, the current of the magnetic bearing coil is measured, and the displacement of the radial channel of the rotor is measured; at the same rotating speed, the test mass current is added for the second time, the current of the magnetic bearing coil is measured, and the displacement of the rotor on the radial channel is measured; finally, the static and dynamic unbalance of the rotor is identified according to the currents and displacements measured at three times. The on-line identification method is simple and easy to implement by starting a car at one time and is applied to identification of the static and dynamic unbalance of the magnetic suspension rotor in the on-line dynamic balance process.

The invention provides a reversible Pickering emulsion, and the reversible Pickering emulsion comprises an oil phase, an aqueous phase and a nanoparticle activated in situ by an amine surfactant or anamine derivative surfactant. The nanoparticle is a lipophilic, hydrophilic or amphiphilic nano oxide, and the amine surfactant is primary amine, secondary amine, tertiary amine surfactants or derivatives of the surfactants. The lipophilic nanoparticle is activated in situ by a short chain amine surfactant or a short chain amine derivative surfactant; the hydrophilic or amphiphilic nanoparticle isactivated in situ by a long chain amine surfactant or a long chain amine derivative surfactant. The invention further provides a drilling fluid comprising the emulsion. An enhancer for the drilling fluid is an amphiphilic hyperbranched polymer, the density of the prepared reversible high-temperature high-density drilling fluid is directly adjusted within 1.6g/cm<3> to 2.2g/cm<3>, and has the relatively excellent properties of rheological property, suspension stability, filter cake clearance, filter loss control, environmentally friendliness, and reversibility of a water-in-oil emulsion and anoil-in-water emulsion.

The invention discloses polyamide aerogel fibers and a preparation method and application thereof. The polyamide aerogel fibers have a communicated three-dimensional porous network structure, and thethree-dimensional porous network structure is formed by overlapping a polyamide nanostructure. The preparation method includes the following steps: providing a polyamide spinning solution, preparing polyamide gel fibers by adopting a gel spinning method, a wet spinning method, a dry spinning method, a 3D printing method and the like, and drying the polyamide gel fibers to obtain the polyamide aerogel fibers. The polyamide aerogel fibers disclosed by the invention have the unique three-dimensional porous network structure, extremely low thermal conductivity, higher porosity, certain spinnability, and excellent skeleton structure stability, and can be applied to the fields of textile and the like In addition, the obtained polyamide aerogel fibers can fill different functional materials without affecting the stability of a skeleton material, and have great application prospects.

The invention discloses voriconazole eye drops. Every 1000 milliliters of eye drops contain 3-50g of voriconazole powder, 20-500g of hydroxypropyl-beta-cyclodextrin, 0.1-0.3g of bacteriostat, 0.5-2.5g of sodium hyaluronate and the balance of water for injection, wherein the bacteriostat is benzalkonium chloride, benzalkonium bromine or ethylparaben. The invention also discloses a preparation method of the voriconazole eye drops. The invention greatly increases the solubility of voriconazole in water to 0.3-5%, so that the medicine can exist in water solution in the form of molecules, thereby providing convenience for exerting the antifungal action of the medicine. Meanwhile, when being applied to eyes, the invention provides convenience for exerting the antifungal action of the medicine through cornea. The preparation method can be carried out at room temperature without affecting the medicine stability, and has the advantages of simple and easy realization and low cost.

The invention provides a preparation method of a hydrophilic ultra-filtration membrane, wherein the method comprises the following steps: introducing high-valence metal salt containing Fe3+, Al3+ and the like into film casting solution to perform cross-linking reaction with hydrophilic additives in the film casting solution so as to limit dissolution and loss behaviors of the water-soluble hydrophilic additives in film forming and running processes. The method is convenient to operate and easy to control, applicable to preparing the hydrophilic macromolecular ultra-filtration membrane by a dry or wet process, fixing the hydrophilic additives containing oxygen and nitrogen functional groups, such as polyvinyl alcohol (PVA), polyethylene glycol (PEG), polyethylene oxide (PEO) and polyvinyl pyrrolidone (PVP). The method is capable of effectively improving and stabilizing the hydrophilic property of the ultra-filtration membrane and resolving easy loss and uneven distribution problems of the hydrophilic additives in the prior art.