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580results about How to "Inhibit injection" patented technology

Desalination method

ActiveUS7600567B2Inhibit injectionPrevent clay swelling and particle migrationGeneral water supply conservationFluid removalInjection wellChemistry
A method of recovering hydrocarbons from a porous subterranean hydrocarbon-bearing formation comprising the steps of: a) feeding to at least on reverse osmosis unit of a desalination assembly a high salinity water feed stream having a total dissolved solids content (total salinity) of at least 10,000 ppm; b) driving a portion of the high salinity water feed stream across a membrane in the reverse osmosis unit of the desalination assembly at a pressure above the osmotic pressure of the high salinity water feed stream while excluding at least a portion of the dissolved solids from crossing said membrane to produce a treated low salinity water product stream having a total salinity of less than 5,000 ppm and a concentrated waste brine stream wherein the hydrostatic head exerted by the high salinity water feed stream on the feed side of the membrane provides at least a major component of the pressure required to overcome the osmotic pressure; c) injecting the low salinity water product stream into the hydrocarbon-bearing formation from an injection well; d) displacing the hydrocarbons with the low salinity water product stream toward an associated production well; and e) recovering hydrocarbons from the formation via the production well.
Owner:BP EXPLORATION OPERATING CO LTD +1

Methods and apparatus for introducing cells at a tissue site

The present invention relates to methods and devices for maintaining cellular viability and function for therapeutic purposes. The invention provides methods and devices for maintaining the proliferative and developmental potential of cellular preparations by protecting the from physical and physiological damage during storage, preparation, and delivery to a site (e.g., a tissue site). The invention also provides methods and devices for evaluating tissues and organs, and selecting appropriate sites for cellular delivery.
Owner:BIOSTAGE INC

System and method for SQL injection prevention

The invention discloses a system and method for preventing SQL injection, which includes an IP blacklist filter module, a request rule detection module and an http response interception module; the IP blacklist filter module is used to set the request source IP meeting certain attack conditions as Blacklist, the system automatically intercepts IP requests in the blacklist; the request rule detection module is used to detect the legality of request parameters for requests that pass IP detection, and intercept requests with abnormal parameters; the http response interception module is used to Intercept error return information, filter out error prompt information, and prevent sensitive information from being exposed. The invention solves the security problem of the existing SQL injection or SQL hidden danger system, and increases the security of the server.
Owner:SICHUAN CHANGHONG ELECTRIC CO LTD

Hybrid direct-current transmission converter and direct-current transmission device

The invention discloses a hybrid direct-current transmission converter. The hybrid direct-current transmission converter is provided with four topological structures which are series connection circuits formed by combining anodes and cathodes of current source type valve group units and positive electrodes and negative electrodes of voltage source type valve group units in different modes. Each current source type valve group unit only comprises a current source type valve group or comprises a current source type valve group and a bypass switch or comprises a current source type valve group, a bypass switch and a disconnecting link assembly. Each voltage source type valve group unit only comprises a voltage source type valve group or comprises a voltage source type valve group and a bypass circuit or comprises a voltage source type valve group, a bypass circuit and a disconnecting link assembly. A direct-current transmission device composed of the hybrid direct-current transmission converter effectively solves the problem of commutation failures of a direct-current transmission system based on thyristors and the problem of direct-current faults of a direct-current transmission system based on a voltage source converter, and has the advantages that loss is low, a reactive compensation device is not needed or a small number of reactive compensation devices are needed, and the direct-current transmission device can be connected into a passive alternating-current system and has the inverse power output function.
Owner:NR ELECTRIC CO LTD +1

Control method of restraining output DC component of grid-connected photovoltaic inverter

The invention relates to a control method of restraining the output DC component of a grid-connected photovoltaic inverter, which pertains to the technical field of inverting grid-connected control. The invention is proposed for solving the problems of high cost of the adoption of a high-capacity blocking capacitor system and the large volume, high power consumption and high price of the adoption of a power frequency transformer during the restraining of the output DC component of a grid-connected photovoltaic inverter. The method of the invention adopts the grid-connected current, attains the DC component thereof and carries out restraining by two steps: 1. DC component due to sampling errors is introduced into the given grid-connected current in a manner of inverse feedback; 2. the average DC component of the modulating signals of each switch cycle in the previous power frequency period is obtained and then the DC component due to unbalanced impulse width is formed after PI regulation and introduced into the primary modulating signals in a manner of inverse feedback. With the two steps, modulating signals of restraining DC component are finally formed and PWM driving signals are obtained for driving the four switching tubes of the grid-connected photovoltaic inverter.
Owner:HARBIN INST OF TECH

Safety system for cloud operating system

The invention discloses a safety system for a cloud operating system. The page safety of the system network (WEB) is guaranteed through a front page safety module, and the resource access safety is guaranteed through an access control module; the confidentiality and integrity of key information and confidentiality and safety of data storage in the external communication process of the system are guaranteed through a data safety module; the safety of physical resources is guaranteed through a physical resource safety module; the safety of a virtual machine, a virtual network and virtual storage is guaranteed through a virtual resource safety module; the safety of an external application program interface (API) in the system and the safety of a console channel of the virtual machine are guaranteed through a communication safety module; the log completeness and alarm accuracy and real-time property are guaranteed through an audit module; and the safety of related processes of the system and the safety of a Hypervisor layer are guaranteed through a system safety module, so that the safety of the cloud operating system is wholly guaranteed, and the safety system for the cloud operating system is perfect.
Owner:INSPUR BEIJING ELECTRONICS INFORMATION IND

Harmonic characteristic measuring method and harmonic characteristic measuring apparatus

Single-phase currents at two frequencies f alpha and f beta (f alpha <nxfs<f beta ) of non-integral multiples of a system fundamental wave frequency fs sandwiching an targeted harmonic (frequency nxfs) are injected between two phases of a three-phase power system as interharmonic currents. A frequency analysis of measurement current and measurement voltage of each phase in the system is carried out and a positive-phase-sequence current I1, a positive-phase-sequence voltage V1, a negative-phase-sequence current I2, and a negative-phase-sequence voltage V2 are detected for each of the two frequencies f alpha and f beta in the system based on injecting of the interharmonic currents. Positive-phase-sequence and negative-phase-sequence admittances Y1 and Y2 or positive-phase-sequence and negative-phase-sequence impedances Z1 and Z2 are found for each of the frequencies f alpha and f beta in the system as Y1=I1/V1 and Y2=I2/V2 or Z1=V1/I1 and Z2=V2/I2. Interpolation operation is performed for finding positive-phase-sequence and negative-phase-sequence admittances or positive-phase-sequence and negative-phase-sequence impedances for the targeted harmonic in the system from the admittances Y1 and Y2 or the impedances Z1 and Z2 for the frequencies f alpha and f beta .
Owner:NISSIN ELECTRIC CO LTD +1

Blue light beauty instrument and application method thereof

The invention discloses a blue light beauty instrument and an application method thereof. A positioning cursor mechanism which can emit a cross cursor and a blue light LED are fixedly arranged in a cavity of a shell. The cross cursor penetrates a top cover of the shell and a center axis X is superposed with a center axis Y of the shell. The blue light LED is located at an emitting direction of the cross cursor and is towards the top cover, and emitted blue light penetrates the top cover. The positioning cursor mechanism and the blue light LED are electrically connected to a control panel. The control panel is electrically connected to an inductive sensor used for closing the cursor positioning mechanism and triggering the blue light LED. Through a positioning cursor, an acne to be removed is positioned and a position aligned by an effective work area of the blue light can be visually and accurately determined so that beauty treatment efficiency is increased and the blue light can be prevented from emitting to sensitive positions of an eye portion and the like. Through a safe triggering mechanism, only when skin of an acne position to be removed is effectively contacted, the blue light is started. Therefore, a possibility of generating an accident that the blue light is started directly and may be emitted to the eye portion in the prior art is greatly reduced.
Owner:逸丝(上海)贸易有限公司
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