929results about How to "System stability" patented technology

A power supply system capable of smoothing photovoltaic generation output, and enabling time shift is provided. A power supply system including a DC power supply string in which a storage battery is connected in parallel to a DC power supply; and a DC/AC power conversion device for connecting the DC power supply string to a power system or a load is provided. A switch is connected between the DC power supply and the storage battery, where an output power of the DC power supply or a combined output power of the DC power supply and the storage battery is switched and supplied to the DC/AC power conversion device by the switch. The photovoltaic generation output is thereby smoothed, and time shift is enabled.

Systems and methods of the present invention manage data flow of a computer and computer network in a secure domain. The system includes an administration module and a management module. The administration module assigns a security label to data within the secure domain, and establishes a set of schema based on the security labels associated with the data. The management module regulates data flow within the secure domain based on the set of schema.

The present disclosure relates to a number of inventions directed, generally, to the application of image processing techniques to traffic data acquisition using video images. The inventions reside in a traffic monitoring system, the basic function of which is for traffic data acquisition and incident detection. More specifically, the application of image processing techniques for the detection of vehicle, from sequence of video images, as well as the acquisition of traffic data and detection of traffic incident. In one aspect, the present invention provides a method of processing images received from a video based traffic monitoring system. In another aspect, the present invention is directed to a Region Of Interest (ROI) for detection of a moving vehicle and a further aspect is directed to a method of detecting day or night status in a traffic monitoring system. It's The application of various algorithms to a video based traffic monitoring system is also considered inventive. Other inventive aspects of the present traffic monitoring system are outlined in the claims.

A system and method for separating a mixture of audio signal into desired audio signals (430) (e.g., speech) and a noise sign (440) is disclosed. Microphones (310, 320) are positioned to receive the mixed audio signals, and an independent component analysis (ICA) processes (212) the sound mixture using stability constraints. The ICA process (508) uses predefined characteristics of the desired speech signal to identify and isolate a target sound signal (430). Filter coefficients are adapted with a learning rule and filter weight update dynamics are stabilized to assist convergence to a stable separated ICA signal result. The separated signals may be peripherally-processed to further reduce noise effects using post-processing (214) and pre-processing (220, 230) techniques and information. The proposed system is designed and easily adaptable for implementation on DSP units or CPUs in audio communication hardware environments.

A system for reducing central sleep apnea (CSA) is described in which certain methods of increasing a patient's rebreathing during periods of the sleep cycle are used. By increasing rebreathing during periods of overbreathing, the over-oxygenation which typically results from the overbreathing period can be reduced, thus reducing the compensating underbreathing period and effectively reducing the loop gain associated with the central sleep apnea. Nasal occlusion and a leak resistant oral interface provide control for gas leaks from a patent interface.

The invention relates to a preparation method of an organic exhaust gas micro-emulsion absorption liquid, and a method for applying the micro-emulsion absorption liquid for cleaning industrial organic exhaust gas comprising benzene, toluene, xylene, and the like. The invention belongs to the technical field of atmosphere pollution control. The absorption liquid is prepared from the components of, by mass, 80-90% of water, 0.5-3% of a surfactant, 7-19.5% of a coupling agent, and 0.02-0.06% of an auxiliary agent. The surfactant is sufficiently mixed with water, such that a surfactant solution is obtained; the auxiliary agent is dissolved in water, such that an auxiliary agent solution is obtained; the two solutions are combined and uniformly mixed; and the coupling agent is added, and the obtained solution is stirred, such that the organic exhaust gas micro-emulsion absorption liquid is obtained. The organic exhaust gas micro-emulsion absorption liquid is suitable to be used for controlling exhaust gas containing benzene-series volatiles, and has the advantages of convenient raw material source, low cost, mild and stable property, low toxicity, environment-friendliness, no absorption tower corrosion or blocking phenomena, no severe influence to human health, high removal rate to organic exhaust gas, no need of pretreatment upon exhaust gas, and low investment and running cost. Saturated absorption liquid and absorbed organics can be recycled, such that waste can be turned useful.

The present invention relates to estimating the attitude angles of an aircraft (1). The estimated attitude angles are generated by a device (9) that performs algorithmic integration on inertial measurements indicative of an angular velocity and of a linear acceleration. Horizontal components (34-39) of desired corrections are obtained by a linear combination of two horizontal components (32-33), with cross coefficients between said horizontal axes being continuous variable over time and dependent on the estimated rate of turn. As a result, the estimated attitude angles are stable, and the biases of the gyros continue to be estimated, including during stages during which the aircraft (1) is turning.

The invention discloses conductive ink based on a graphene composite material and a preparation method thereof. The conductive ink is prepared from the following components in parts by mass: 1-30 parts of a functional graphene composite material, 1-70 parts of a resin coupling agent, 5-60 parts of a solvent and 1-40 parts of an auxiliary. According to the method, graphene is modified into a functional graphene composite material, low density and high conductivity of graphene can be maintained, the situation that graphene is easily agglomerated and difficult to disperse can be improved, and then affinity between conductive filler and a resin connecting material is improved, so that the high-conductivity conductive ink under a low-content conductive agent can be successfully prepared. The conductive ink is simple in preparation method, stable in system, good in conductivity and easy to print, has a flexible and abrasion-resistance membrane layer, can be widely applied to radio frequency tags, intelligent package, film switches, conductive circuits, sensors and other light flexible electronic products, and has a huge market prospect.

A method and a system control admission for voice transmission over a multi-hop network. The method takes multiple parameters into account in order to make a decision and ensures that the system remains stable. The parameters may include options (e.g., aggregation level, bursting level, and transmission rate) and constraints (e.g., the number of users, access points, or sensing range of each user). The method computes the load of the network given each set of options and constraints and compares it against the packetization interval of the voice codec to check whether or not the system is stable. An algorithm of the method finds the best trade-offs between overhead reduction (e.g., due to contention and to packet headers) and a solution robust to channel errors, if links are noisy. If several stable solutions corresponding to different options exist, additional criteria (e.g., the least number of hops, the highest transmission rate) may be used to determine the final “best” solution.

The present invention discloses a multi-positive-ion amide-type asphalt emulsifier and a preparation method thereof, and the asphalt emulsifier is prepared from raw materials of N-hydrogenated tallow-1,3-propylene diamine, an alcohol solvent, acrylamide, a low-carbon tertiary amine, industrial hydrochloride and epichlorohydrin in the molar ratio of N-hydrogenated tallow-1,3-propylene diamine to alcohol solvent to acrylamide to low-carbon tertiary amine to industrial hydrochloride to epichlorohydrin of 1mol: (5.00-11.00) mol: (3.00-3.10) mol: (2.02-2.10) mol: (2.02-2.10) mol: (2.02-2.08) mol. The alcohol solvent is ethanol, methanol or isopropanol. The low-carbon tertiary amine is a trimethylamine aqueous solution, triethylamine or triethanolamine. The asphalt emulsifier synthetic raw materials are readily available, production cost is low, a process is simple, and a high temperature reaction is not required. The asphalt emulsifier can emulsify a variety of different types of asphalt, the prepared emulsified asphalt is fine, uniform, and good in storage stability, and positive-ion-type emulsified asphalt can be prepared.

The present application provides a control device for controlling a switching converting module to generate an output signal of constant output current from a rectified AC power supply signal. The switching converting module comprises a primary winding for receiving the rectified AC power supply signal and a power switch coupled in series with the primary winding. The control device comprises: an AGC amplifier configured to receive a first sampling signal sampled from the rectified AC power supply signal, and to generate a reference signal of constant amplitude according to the first sampling signal; a signal comparator configured to compare the reference signal with a current sensing signal in proportion to a primary side current flowing through the primary side winding to generate a comparison signal; a signal generator configured to receive a second sampling signal sampled from the output signal, and to generate a clock signal according to the second sampling signal; and a control logic configured to generate a control signal for switching the power switch according to the comparison signal and the clock signal.

The invention disclose a modified sand body, which is formed by the mixing of solution and sand, wherein the solution with cohesiveness and adhesion is formed by dissolving water-soluble solid state organic substance in water. According to the invention, after the water is evaporated, the water-soluble solid state organic substance can bond sand particles, and dissolve in water again to form the solution with the cohesiveness and the adhesion to bond the sand particles; the modified sand body allows a common sand body to be in 'pedogenesis', changes the interaction relation between sand body particles, and forms a particle pore structure with binding force (cohesive force); when the modified sand body is in the use process, the substance is difficult to run off due to the characteristics of the cohesiveness and the adhesion; the sand body is allowed to have same properties of stabilizing and storing moisture and nutrient as the properties of the soil, so as to be able to provide strong conditions for the growing of plants, and be an ideal measure for the governing of deserts; meanwhile, the modified sand body can also be taken as a means to utilize sand resources of a sand beach and the like to conduct plant planting.

The invention provides an anti-tumor polypeptide nano-drug as well as a preparation method and application thereof. The anti-tumor polypeptide nano-drug comprises amphiphilic anti-tumor polypeptides and acid responsiveness functional molecules coupled with the amphiphilic anti-tumor polypeptides; the amphiphilic anti-tumor polypeptides comprise hydrophilic anti-tumor polypeptides, enzyme responsiveness polypeptides and hydrophobic polypeptides. According to the anti-tumor polypeptide nano-drug prepared by the preparation method, the bottleneck that the common polypeptide drug is short in half-life period is overcome; therefore, the anti-tumor polypeptide nano-drug is a tumor immunotherapy polypeptide nano-drug which has dual responsiveness of a weak acid environment and protease on a tumorsite and is good in responsiveness, strong in stability, high in safety, high in bioavailability and good in anti-tumor function.

The invention relates to a charged-particle-optical system for a charged particle beam exposure apparatus, said system comprising: a first aperture means comprising at least a first substantially round aperture for partially shielding an emitted charged particle beam for forming a charged particle beamlet; a lens system comprising at least one lens for focussing a charged particle beamlet from said first aperture within or in the vicinity of an image focal plane of said lens; a deflector means, substantially located in said image focal plane, comprising at least one beamlet deflector for the deflection of a passing charged particle beamlet upon the reception of a control signal, and a second aperture means comprising at least one second substantially round aperture positioned in the conjugate plane of the first aperture, and said second aperture being aligned with said first aperture and said beamlet deflector for blocking said charged particle beamlet upon deflection by said beamlet deflector and to transmit it otherwise.

The invention discloses an anti-collapse circulating microfoam drilling fluid or completion fluid, which consists of (A) base slurry: bentonite 2-4.5 or 6-10, soda ash 0.2-0.3 water 100 parts by weight. (B) Additives: ① Anti-slump agent 2-5, ② Cementing agent 3-5, ③ Viscosifier 0.5-3, ④ Fluid loss reducer 1-3, ⑤ Foaming agent 0.5-5, foam stabilizer 0.5- 2.5, flow regulator 0.5-2.5. The invention has strong anti-slump function and strong adaptability, can be used as both drilling fluid and completion fluid, can be applied to low-pressure carbonate formations, and low-pressure, low-permeability mudstone formations and rock formations It is mainly used in drilling and completion of low-pressure, low-permeability and easy-collapse formations.