2469results about How to "Performance impact" patented technology

A system, method, and computer program product for preventing a malicious user from analyzing and modifying software content. The one-way functions used in prior art systems using dynamically evolving audit logs or self-modifying applications are replaced with a one-way function based on group theory. With this modification, untampered key evolution will occur inside a defined mathematical group such that all valid key values form a subgroup. However, if the program is altered, the key will evolve incorrectly and will no longer be a member of the subgroup. Once the key value is outside of the subgroup, it is not possible to return it to the subgroup. The present invention provides a limited total number of valid keys. The key evolution points are not restricted to locations along the deterministic path, so the key can be used in various novel ways to regulate the program's behavior, including in non-deterministic execution paths.

The invention discloses a water-based ultra-thin fire-retardant coating for steel structures. The fire-retardant coating comprises components as follows: a binder emulsion, an intumescent flame retardant system, filler, deionized water and additives, wherein the additives comprise a dispersing agent, an antifoaming agent, a mold inhibitor, an anti-flash-rust agent, a coalescing agent, a leveling agent and a thickener; the intumescent flame retardant system comprises a dehydration catalyst, a carbonizing agent and a foaming agent. The invention further designs a preparation method of the water-based ultra-thin fire-retardant coating for the steel structures. The components are mixed sequentially to be prepared into the water-based ultra-thin fire-retardant coating for the steel structures in a vertical sand mill and a dispersing tank. The prepared coating is large in adhesive force, high in hardness, good in fireproof property, good in anti-scratch performance and excellent in weather resistance and water resistance, the surface layer of the coating is fine and smooth, the decoration performance is improved significantly, and the preparation method is low in energy consumption and has the advantages that the harm to human bodies and the pollution to the environment during preparation are small and the like.

The water dispersed flame retardant polyurethane consists of: diisocyanate 14-53wt%, flame retardant polyol 6-78 wt%, non-flame retardant polyol 0-52.5wt%, compound with active hydrogen and capable of forming hydrophilic radical 4-8 wt%, neutralizing agent 1.5-5wt%, and small molecular weight chain expander 1-18.5wt%. Its preparation process includes the steps of: pre-polymerizing diisocyanate, flame retardant polyol, non-flame retardant polyol and compound with active hydrogen and capable of forming hydrophilic radical to form pre-polymre I; neutralizing the hydrophilic radical with neutralizing agent to prepare ¿CNCO radical ended pre-polymre II; dispersing pre-polymre II into deionized water and expanding chain with the small molecular weight chain expander to prepare the water dispersed flame retardant polyurethane. The present invention endows the product with internal flame retardant performance and expands the application range of water dispersed polyurethane.

The invention relates to a capacitor thickness detection and crack feedback plate bending machine based on a PLC. The capacitor thickness detection and crack feedback plate bending machine comprises a driving motor, a clamping fixing base and a PLC host machine for controlling the driving motor. A bending shaft is installed on a motor shaft of the driving motor, and a machined piece is arranged on the clamping fixing base. The capacitor thickness detection and crack feedback plate bending machine further comprises a capacitor induction thickness detector installed on a machine frame, a pressure sensor arranged on the lateral side of a clamping groove of the clamping fixing base, a detection feedback device and a controller connected with the PLC host machine. The detection feedback device comprises an ultrasonic crack detector arranged on the clamping fixing base. The capacitor induction thickness detector, the ultrasonic crack detector and the pressure sensor are connected with the PLC host machine through a DSP module. The invention further provides a bending method. According to the capacitor thickness detection and crack feedback plate bending machine and method, sectioned machining is controlled through the PLC, the machined piece is bent at the most proper rotating speed, influences of the excessively-high or excessively-low rotating speed on the machined piece are avoided, bending cracks are reduced, and the machining quality is improved.

The invention relates to an all-region parking lot information sharing and parking position reserving method and a system for achieving the method. The system is jointly composed of a parking position reserving module, a parking position management module, a parking lot efficiency analysis module, a payment management module, a user register module, a communication module, a data centre service module, a settlement module, a bill printing module, a notification module, a parking position reserving terminal and a parking position guiding module. A client can operate the parking position reserving module to conduct parking position reserving through the parking position reserving terminal, the parking fee can be paid in advance through the payment management module, reservation can be completed by a parking position reserving service module in a time scope set when the client conducts reservation through the parking position management programming module, and notification is given to the client. If the reservation fails, the payment management module can send back the pre-paid parking fee in the same way. The parking lot efficiency analysis module is mainly used for conducting urban traffic situation auxiliary analysis on traffic flow analysis of a parking lot. The all-region parking lot information sharing and parking position reserving method and the system are low in cost, bring convenience to the client, and are convenient to operate and high in safety performance.

The invention discloses a method and device for collecting logs. The method comprises the steps that log information generated in a server is packaged into an information object set according to a preset configuration file; a log storing thread is started, and the information object set is stored in a database existing by being independent of the server in a preset data format, wherein the database is supportive of the preset data format. According to the technical scheme provided in the embodiment, the log information can be checked conveniently, statistical analysis or inquiring with filtering conditions can be carried out on the collected log information, and thus the problem of program errors in the independent server or a server cluster environment can be fast positioned or analyzed; meanwhile, the execution efficiency of application programs of the server is improved to a certain extent, and influences on the performance of the system programs of the server can be avoided.

The invention relates to a capacitance type touch screen and a manufacturing method thereof. The capacitance type touch screen comprises a substrate, two sets of transparent conducting films of conducting wires, an insulating film and a metal bridging beam film. In the two sets of conducting wires, the first set of transparent conducting films are continuously arranged, and the second set of transparent conducting films are piecewise arranged by using the transparent conducting films of the first set as intervals. The insulating film covers the surfaces of the two sets of transparent conducting films, and the insulating film above each film section of the second set of transparent conducting films comprises a through hole. The metal bridging film is attached on the insulating film, crosses the first set of transparent conducting films and is connected with the second set of transparent conducting films which are arranged at intervals on both sides of the first set of transparent conducting films by passing through the through hole on the insulating film so as to form the continuous second conducting wires. The method comprises the following steps: manufacturing the first set of transparent conducting films, the second set of transparent conducting films, the insulating film and the metal bridging film to achieve the structure of the touch screen. The invention adopts the metal bridging film, thereby improving the continuity of the second set of conducting wires, reducing the resistance of the second set of conducting wires and the color difference of the touch screen and improving the performance of the touch screen and the product quality.

The invention discloses a phosphogypsum based plastering gypsum, and relates to a plastering material for a building wall. The phosphogypsum based plastering gypsum mainly comprises 75 to 95 percent of phosphogypsum based building gypsum, 1 to 3 percent of sierozem powder, 0.1 to 0.5 percent of retarder, 1.1 to 5.5 percent of composite water retention agent, 0.3 to 1 percent of ethylene-vinyl acetate copolymerized latex powder, and 0 to 20 percent of stuffing. The phosphogypsum based plastering gypsum effectively improves water retention property and lowers cost by adopting the combination of cellulose ether water retention agent and bentonite, effectively adjusts settling time and prolongs operable time by adopting the retarder, improves construction property, cohesive property and cracking resistance by doping the stuffing and the latex powder, and reduces adverse effects of impurities on the strength of plastering gypsum by adding the sierozem powder. The phosphogypsum based plastering gypsum has the advantages of good workability and construction property, long operable time, high breaking resistance, compression resistance and adhesion strength, good volume stability, good cracking resistance and lower cost, and can be used for a plastering layer of the building wall.

The embodiment of the invention discloses a slot antenna, which is applied to a terminal with an all-metal border. The slot antenna comprises a metal bottom plate, a dielectric substrate, a first single-ported open straight slot, a second single-ported open straight slot, a ground lug, a feeding module and a matching circuit, wherein the dielectric substrate is located in a metal middle frame; the first single-ported open circuit straight slot and the second single-ported open circuit straight slot are formed in the upper end of the metal bottom plate; the ground lug is arranged between the single-ported open circuit straight slot and the second single-ported open circuit straight slot; the feeding module and the matching circuit are arranged at the upper end of the dielectric substrate; the open circuit direction of the first single-ported open circuit straight slot is opposite to the open circuit direction of the second single-ported open circuit straight slot, and extends to the edge of the metal bottom plate; a gap is formed between the metal middle frame and the metal bottom plate; the first single-ported open circuit straight slot and the ground lug form a first coupled radiation slot; and the second single-ported open circuit straight slot and the ground lug form a second coupled radiation slot. Meanwhile, the embodiment of the invention further discloses a terminal.

The invention belongs to the technical field of information safety and relates to an authentication technology based on identifications, in particular to a single-point login system and a single-point login method which can be used for realizing safe single-point login among a plurality of application systems. The single-point login system comprises user key equipment and a login authenticating module which is arranged at the server end, wherein an identification private key or a composite private key is stored in the user key equipment; seed public key sets are stored in the server end and the user end; the user key equipment carries out interactive authentication with the login authenticating module at the server end when accessing a server; and the user key equipment is reformed so as to maintain an opening state after a PIN (Personal Identification Number) is input once, and the authentication work is automatically finished between the server end and the client end when the user accesses other application systems, therefore, the ideal effect of single-point login is achieved.

The invention discloses a method for manufacturing an aluminum alloy hollow section for a sedan bumper, relates to a method for manufacturing an aluminum alloy hollow section, and aims to solve the problem that domestic limousine bumpers are low in tensile strength and non-proportional extension strength and dependent on import. The method comprises the following steps of: 1, preparing alloy melt; 2, casting an alloy cast rod; 3, cutting the cast rod off; 4, turning the cast rod to remove oxide; 5, performing homogenizing annealing; 6, heating a cast ingot; 7, extruding; 8, pre-straightening;9, quenching; 10, straightening; 11, aging; and 12, cutting according to length to obtain the aluminum alloy hollow section for an automobile bumper. The straightness and size of the hollow section prepared by the method completely meet the standards of imported bumpers, and the hollow section has high comprehensive mechanical properties. The method can be used for processing and manufacturing sections for limousine bumpers.

The invention relates to the technical field of high molecular materials and particularly relates to preparation and application methods of a selective laser sintering polypropylene powdery material. The method comprises the following steps: obtaining polypropylene powder by a freeze grinding method; grading and collecting by an airflow screening machine, selecting polypropylene powder with the granularity in a range of 200-800 meshes and returning coarse materials which do not meet the fineness requirement to a stock bin and continuously smashing; and adding 100 parts of polypropylene powder, 0.1-1 part of graphite powder, 0.01-0.5 part of antioxidant and 0.5-6 parts of metallic soap salt and uniformly mixing in a high speed mixer, wherein the granularity of the graphite powder is 1000-5000 meshes and the antioxidant is a compound antioxidant consisting of phenols and phosphonate or thioester in a weight ratio of 1:1. The polypropylene powder prepared by the invention has excellent sintering performance and the SLS (Selective Laser Sintering) formed piece prepared by the polypropylene powder has high mechanical property and dimensional precision.

The invention provides a surging predicted control apparatus and control method for marine diesel engine turbine supercharger. The apparatus comprises a pressure sensor, a speed sensor, a V/F modular converter, a frequency meter, an A/D modular converter, a power module, a surging predicted control unit and an air circulating device, an exhaust gas diffluence apparatus, a data storage and alarm indicator. When controlling, at first rotate speed feeding back by the sensor and fluctuation frequency of the turbine supercharger outlet pressure are received, fluctuation frequencies of the outlet pressure and the peak-peak value fluctuation conditions corresponding under each rotate speed obtained by pretest and measured by fact carry out contrast analysis; If surging foreboding is provided in the analytical result and is prevented by controlling air circulating device; if without surging foreboding, the air circulating device is not operated, the supercharger works normally. The invention can greatly reduce occurrence frequency of supercharger surging incident during working in the marine diesel engine to avoid grave accident.

The invention belongs to the field of power batteries, and particularly relates to a power battery temperature prediction system and method. The power battery temperature prediction system includes anacquisition module and a temperature prediction module. In the charging and discharging processes, a key temperature parameter is determined according to multi-objective functions such as the flux ofa lithium ion intercalation reaction, the attenuation amount of the battery capacity and the low-temperature heating charging time, and temperature prediction is performed. According to the method, the accuracy of battery temperature prediction is improved, and the adverse effect of the temperature on battery performance is reduced.

The invention discloses an identity authentication method for a Hadoop cluster. The method comprises the following steps: step one, a client sends a request to an authentication server to request for the ticket granting, the request is sent to the authentication server in a plaintext way, the request message comprises a user name, an authorization server name, a valid survival period, the first random number and a user located Kerberos field user information; step two, after receiving the request message of the client, the authentication server firstly finds a key of the user in a local database according to the user name, if the finding is successful, the authentication is continued. By adopting an authentication mode based on the PKI, the command of the user is unnecessary to save on the KDC, the risk point of the system is reduced, and the security of the Hadoop cluster identity authentication is greatly improved.

The invention relates to a radio frequency power amplifier based on a transformer, comprising an input transformer, a driving circuit, a power amplification circuit, an impedance matching network and an output transformer that are successively connected; the input end of the input transformer is respectively connected with a single-end radio frequency input (RFIN) signal and the ground; the output end of the input transformer is connected with the input end of the driver circuit; the single-end radio frequency input signal is converted into a differential signal, and the differential signal is output to the driver circuit; the differential signal of the driver circuit is output to the power amplification circuit after being amplified; and the power amplification circuit is in the cascode structure. In the radio frequency power amplifier, devices, such as an inductor, a capacitor, a transformer and the like are integrated on a substrate, impact on the performance of the amplifier by the complementary metal oxide semiconductors (CMOS) technology is effectively avoided on the premise of furthest utilizing the advantages of the CMOS technology, and circuit efficiency is improved; and compared with the traditional totally-integrated radio frequency power amplifier, the radio frequency power amplifier disclosed by the invention has the advantages of higher power and efficiency and more stable performance.

A synthetic method of a styrene/maleic anhydride alternating copolymer with low molecular weight belongs to the field of macromolecular precipitation polymerization. Media and chain transfer agents used in the existing methods for preparing styrene/maleic anhydride copolymers by precipitation polymerization have disadvantages. In the synthetic method, the styrene/maleic anhydride alternating copolymer is prepared by taking a mixed solvent of organic acid alkyl ester and alkane as a reaction medium for the precipitation polymerization, alpha-methylstyrene or vinyl acetate as a molecular weight regulator and organic peroxide or an azo compound as an initiator for initiating a copolymerization reaction between styrene monomers and styrene. The synthetic method has simple process, the synthesized copolymer has good properties, and the method has the advantages of being economical, environment-friendly and the like.