623results about How to "Avoid threats" patented technology

A method, system and program for preventing intrusion in a communications network. A source node initiates a request for network services, such as session establishment, database access, or application access. Known network resources and authorized user information is stored in a database at a network portal along with access policy rules that are device and user dependent. Identification of the source node is required before the source node can construct a transformed packet header that is included with a synchronization packet before transmission to a destination node. An appliance or firewall in the communications network receives and authenticates the synchronization packet before releasing the packet to its, intended destination. The authentication process includes verification of the access policy associated with the source node. Once received at the destination node, the transformed packet header is reformed by extracting a key index value. The extracted key index is subsequently used to transform the packet header in the response transmitted to the source node.

The invention relates to a client distribution network automatic remote real-time monitoring system, which conducts remote real-time monitoring on electrical equipments of at least one low-voltage and mid-voltage substation via a main network or a standby network. The system comprises a centralized control center and a plurality of subsite terminals which are communicated with the centralized control center via the network. The system has the advantages of that: a set of automatic management systems are constructed on the subsite terminals, and the centralized control center conducts uniform real-time monitoring on a client substation through the management mode of communicating the network with the centralized control center; thereby ensuring the safe operation of the client substation when unattended, creating an automatic monitoring system, supplying the automatic remote monitoring system of a gap that a prior domestic substation can only be used in a large-scaled substation in the main grid of the power network due to high cost and challenging communication requirements and a common low-voltage and mid-voltage substation is unable to realize automatic remote monitoring due to financial and technical reasons, and establishing the technical basis for major electrical users to achieve socialized professional operation and maintenance.

A computer-implemented method for safely routing a soldier to a destination on the battlefield. The method includes a Threat Analyzer (100) for assessing threats to the soldier, a Graph Builder (102) for building a graph representing the battlefield, a Route Generator (104) for generating a route that avoids the threats, and a Route Presenter (106) for guiding the soldier along the route. The Threat Analyzer (100) includes an Enemy Analyzer (200) for determining the attack range of enemy units and an Obstruction Analyzer (202) for detecting obstructions in aerial imagery. The Graph Builder (102) includes a Cost Evaluator (712) that takes into account traversal speeds for soldiers across various types of terrain. The Route Presenter (106) overlays the route on live video in the soldier's heads-up display.

Hardware and/or software countermeasures are provided to reduce or eliminate vulnerabilities due to the observable and/or predictable states and state transitions of microprocessor components such as instruction cache, data cache, branch prediction unit(s), branch target buffer(s) and other components. For example, for branch prediction units, various hardware and/or software countermeasures are provided to reduce vulnerabilities in the branch prediction unit (BPU) and to protect against the security vulnerabilities due the observable and/or predictable states and state transitions during BPU operations.

The invention belongs to the technical field of transmission control regulations, such as data link level control regulations, and discloses a mobile crowdsourcing data acquisition and processing system and method based on a block chain. The miner discovers other miner nodes in the block chain network, downloads the block chain content and builds a block chain system together; The user issues thetask to the block chain through the miner, and the miner recruits the working node to complete the corresponding task. Collection and trust evaluation of feedback information: after the task is completed, a miner collects the feedback information of each node participating in the task and completes trust evaluation work of the nodes. Block generation and selection: a miner checks whether the information on the block satisfies a condition of generating a new block, generates the new block if the information on the block satisfies the condition of generating the new block, and broadcasts the block in the block chain network to achieve consistency. According to the invention, an incentive mechanism and system security of a miner are realized without depending on the presence of online currency; The bifurcation problem existing in the existing block chain technology is solved; Execution efficiency is high.

The invention discloses a real-time path planning method for an unmanned aerial vehicle based on deep reinforcement learning. The method comprises the steps of S1, obtaining the current environment state of the unmanned aerial vehicle from a simulation environment, calculating the threat degree of a target object defense unit to the unmanned aerial vehicle according to a situation evaluation model, and constructing a situation map of a task area of the unmanned aerial vehicle; constructing a main network and a target network of the convolutional neural network and the competitive neural network to perform action selection; S2, obtaining the current environment state of the unmanned aerial vehicle according to the communication link, calculating a threat value of the target object defense unit to the unmanned aerial vehicle according to the situation evaluation model, constructing a situation map of the task areas of the unmanned aerial vehicle, constructing a competitive dual-Q network, loading the trained network model, evaluating the Q value of each action in the current state, selecting the action corresponding to the maximum Q value, determining the flight direction of the unmanned aerial vehicle, and completing the flight task. According to the invention, the autonomous decision-making ability of the unmanned aerial vehicle can be effectively improved, and the method has high robustness and application value.

The invention discloses an epoxy resin based on gallic acids with a structure shown as the formula I, which has high epoxy values and also has higher crosslinking density after being cured, thus having good mechanical property and thermal property. The invention also discloses a preparation method of the epoxy resin based on the gallic acids, comprising the following steps: mixing the gallic acids, epoxy halogenopropane and a catalyst and reacting for 2-5 hours at the temperature of 100-120 DEG C; cooling to 20-40 DEG C; adding alkaline compounds and water and continuing to react for 2-5 hours; and washing, removing a solvent and drying to obtain the epoxy resin based on the gallic acids. The preparation method is simple in process, good in controllability and easy to implement industrially. The invention also provides an application of the epoxy resin based on the gallic acids. The epoxy resin based on the gallic acids is particularly applied to preparing composite materials, epoxy adhesives and coatings.

A device with microbubble-induced superhydrophobic surfaces for drag reduction and biofouling prevention includes an anodic microporous plate, a cathodic microporous plate, and a DC power supply. The anodic microporous plate and the cathodic microporous plate are mounted to a hull surface of a ship. The DC power supply includes a positive pole electrically connected to the anodic microporous plate and a negative pole electrically connected to the cathodic microporous plate. Seawater is electrolyzed to generate hydrogen microbubbles adjacent to a surface of the cathodic microporous plate and to generate oxygen microbubbles adjacent to a surface of the anodic microporous plate, forming superhydrophobic surfaces on the surfaces of the anodic microporous plate and the cathodic microporous plate. Electric current flows through the anodic microporous plate and the cathodic microporous plate to prevent biofouling.

The invention relates to an unmanned ship route optimization method based on environment forecast information. According to the method, environment information factors possibly influencing marine navigation of an unmanned ship are collected through meteorological forecast, the current position of the unmanned ship is confirmed through a global positioning system, and an accurate unmanned ship navigation state is obtained; modeling is performed on the environment of a sea area by considering the influences of static barriers in an unmanned ship navigation area and the meteorological factor of ocean currents on the unmanned ship in combination with obtained environment data; and design is performed based on an unmanned ship route planning algorithm of a particle swarm optimization algorithm,an unmanned ship route designed through the planning algorithm avoids the static barriers as much as possible, and the ocean current area beneficial for unmanned ship navigation is utilized. Throughthe method, the unmanned ship can design the route according to the environment forecast information, the route can be timely adjusted at any time according to weather environment changes, the situation that a bad environment on the sea area threatens the safety of the unmanned ship is avoided, and the economy and safety of unmanned ship navigation are improved.

The invention discloses a safety and stability control device reliability analysis method in consideration of multistate operation, which belongs to the technical field of power system control. A hardware system structure of the safety and stability control device is firstly analyzed; a fault tree model for the safety and stability control device is then built based on a fault tree method, and the failure rate of the safety and stability control device is acquired; and finally, on the basis of Markov state space, a reliability evaluation model for the safety and stability control device is built, and the probability values of the safety and stability control device in four different operation states are calculated. The hardware system structure of the safety and stability control device and the importance degree of each stable control module for composing the device in the device are considered, the fault tree method and the Markov state space method are combined to carry out reliability evaluation on the safety and stability control device, the reliability degree of the device is thus judged, influences on reliability of the device by external faults are considered during the evaluation process, and the evaluation result is more objective and more accurate.

A cap device, particularly for a wine bottle, is disclosed as including a cap having a recessed top opening for receiving a screw for threadable insertion into the cork of the wine bottle. The recess at the top of the cap is of basically square shape with two recess extensions for receiving a butter knife, or the like, for turning the cork and screw as a unit and thereby unscrewing the cap, which is threadably attached to the outside of the neck of the wine bottle. The threading direction of the threads of the cap and neck of the wine bottle are opposite to the threading direction between the cork and the screw. Additionally, the cap is structured to extend a distance above the extent of the cork in the neck of the wine bottle, the cork is bullet-shaped and channels are defined transverse to the threads extending outwardly of the neck of the wine bottle, in order to allow the escape of compressed carbon dioxide in a sparkling wine or champagne bottle as the cap is unscrewed and the cork lifted. The top of the screw defines a spherical projection in order to assist guiding the cork in, with respect to the recess of the cap, when reinserting the cork after use.

The invention discloses a coating device and a coating method. The coating device comprises a needle head, a clamp, an imaging device, a height measurement device and a control device, wherein paint is sprayed on the needle head, the clamp is positioned under the needle head, and the clamp and the needle head can relatively move in a transverse direction and a longitudinal direction; the imaging device, the height measurement device and the control device are positioned above the clamp; the needle head can vertically move relative to the clamp; the needle head is connected with a flow control device, and the imaging device, the height measurement device and the flow control device are connected with the control device. During coating, the injection quantity of the paint of the needle head and the opening and closing of a valve are controlled through the flow control device. In the injection process, the control device controls the relative positions of the clamp and the needle head in the transverse direction and the longitudinal direction so as to ensure that the needle head carries out point injection according to a point injection track determined in advance, and controls the needle head to vertically move relative to the clamp so as to ensure that the distance between the needle head and the surface of a product to be coated is constant.

The invention discloses a solar street lamp for traffic management support. The solar street lamp comprises a lamp holder, a lamp pole and a solar panel support plate, wherein a revolving shaft is arranged on the top of the lamp pole, and is rotatably connected with the solar panel support plate through the revolving shaft; an illumination sensor is arranged at the lower end of the solar panel support plate; an angle adjusting mechanism is arranged on the upper surface of a support platform in a sliding way; the angle adjusting mechanism comprises a motor seat, an adjusting motor, a gear disk, a rack, a guide wheel, a guide seat, a support rod and a carrier rod; a vehicle stopping mechanism is arranged on the side wall of the lamp holder; the vehicle stopping mechanism consists of a slope, a belt, a runner, an energy absorption pad, an anti-collision plate and a mounting groove. In the solar street lamp, sunlight is sensed by the illumination sensor, and the controller is used for controlling the adjusting motor to rotate in order to adjust the illumination angle of a solar panel; the vehicle stopping mechanism can separate front wheels of a vehicle from the ground, so that forward moving power is lost, the vehicle is stopped rapidly, and a vehicle in accident is prevented from threatening the safety of other pedestrians and vehicles.

The invention discloses an attribute-based online/offline keyword search method and its cloud computing application system in a mobile cloud environment, comprising the following steps: system initialization, TA generates a public key and a master key; TA generates an intermediate key offline for a new user After the new user completes the registration, TA generates its attribute private key; TA generates an outsourced key for the new user; the data master encrypts the information offline on the mobile device side to obtain the intermediate ciphertext;) the data master encrypts the intermediate ciphertext online to obtain the complete ciphertext The data master generates an index set, and the user uses its own attributes to generate relevant trapdoors, and sends them to the cloud server together; the cloud server receives the encrypted index and trapdoor, and searches for keywords; the user decrypts to obtain the target information. The present invention realizes searchable encryption based on an attribute encryption mechanism and online/offline technology, protects user privacy, and greatly reduces user expenses.

The invention discloses a novel process of nickel citrate for catalyzing thiosulfate to leach gold. The novel process is characterized in that the nickel citrate catalysis is used for substituting the traditional copper ammonia catalysis, namely the nickel sulfate and the citric acid (or sodium citrate) are added in the thiosulfate gold leaching pulp to substitute the adding of the copper sulfate and the ammonia. By adopting the process, the oxygenolysis effect of the Cu(NH3)4<2+> and S2O3<2-> is eliminated so that the consumption of the thiosulfate is obviously reduced; and besides, the use of the ammonia is cancelled so as to avoid the risk of the NH3 on the environment. The gold leaching rate is equal to that of the copper ammonia catalysis.

The invention discloses a method and a device for detecting hijacking of a DNS (Domain Name Server), and belongs to the technical field of Internet. The method comprises the following steps: sending a domain name solving request which carries a first domain name to a first DNS, wherein the first domain name is a domain name which does not exist in a network; receiving the solving result of the first domain name returned by the first DNS, and sending a domain name solving request which carries a second domain name to the first DNS if a first address list corresponding to the first domain name exists in the solving result of the first domain name, wherein the second domain name is a domain name which exists in a network needing to be accessed in a target application; receiving a solving result of the second domain name returned by the first DNS, and determining that hijacking of the first DNS is detected if the same addresses exist in a second address list corresponding to the second domain name in the solving result of the second domain name and the first address list. By adopting the method and the device, the function of actively detecting the DNS server is realized, threat caused by access to the Internet by a terminal after hijacking of the DNS is avoided, and the security of the terminal is enhanced.

The invention relates to a safety mobile office method based on a WMI software whitelist mechanism and belongs to the technical field of terminal equipment safety office. The method is characterized in that the various attributes, serving as software attribute parameters, of software and setting number form an application software whitelist, system PE files during initial system installation of a computer form a system software whitelist, and the application software whitelist and the system software whitelist jointly form a global software whitelist; the global software whitelist is divided into the software whitelist of each department according to the requirements of the corresponding department, and the software whitelist is issued to the safety mobile office terminals of department staff; a user transmits a software request to a server end through an authentication code formed by a department identification code and a staff PIN code; a monitoring program is built on the basis of WMI on the corresponding safety mobile office terminal, the monitoring program performs starting detection on software installation and operation, comparison with the whitelist is performed, and installation and operation are allowed after the comparison is passed. Compared with existing application program mounting control methods, the method is good in stability, safety and compatibility, and mounting efficiency and operation efficiency are increased.

The invention relates to a landslide disaster risk regionalization map generation method, belongs to the technical field of landslide risk prediction and early warning, and solves the problem of low accuracy of an existing landslide risk prediction method. The method comprises the following steps: identifying landslide disaster points and non-disaster stable areas in a research area, and obtaininga training set layer and a verification set layer; obtaining and combining geological-environmental factors related to a plurality of landslide disasters in the research area, and constructing a multilayer geological-environmental factor data set; training a landslide risk prediction model by taking the constructed data set as an input variable and the training set layer as a dependent variable,and verifying the trained landslide risk prediction model by utilizing the constructed data set and the verification set layer to obtain a successfully verified landslide risk prediction model; and inputting the constructed data set into the verified landslide risk prediction model, carrying out processing to obtain a grid value of each grid in the research area, and drawing a landslide disaster risk regionalization map of the research area based on a corresponding relationship between the grid values and risk levels.