16results about How to "Effective defense" patented technology

The high-protection outer rotor axial flow fan comprises an outer rotor motor and a wind wheel, the outer rotor motor comprises a base, an outer rotor assembly, a rotating shaft and a stator assembly, and the base comprises a bottom plate and a sleeve protruding upwards from the middle of the top face of the bottom plate. The shaft support is installed on the two bearings, the top end of the shaft support is connected with the outer rotor assembly, the stator assembly is arranged outside the sleeve in a sleeving mode, an annular boss is arranged on the edge of the bottom plate, and a labyrinth sealing structure is formed by the annular boss and the end of the outer rotor assembly. The wind wheel comprises blades and a hub, the blades are installed on the outer side of the hub, and the hub is installed outside the outer rotor assembly through an installation support. The base is sleeved with an outer water retaining ring, an inner water retaining ring is installed on the installation support, and the outer water retaining ring and the inner water retaining ring are matched to form a water retaining device on the periphery of the labyrinth sealing structure. The waterproof and dustproof levels of the axial flow fan are greatly improved, the reliability is high, and the failure rate is low.

The invention discloses a frame structure of a photovoltaic sunshade and the photovoltaic sunshade. The frame structure of the photovoltaic sunshade comprises a plurality of frame assemblies and a plurality of stand column assemblies. The plurality of frame assemblies are used for installing a photovoltaic assembly, and two adjacent frame assemblies comprise a first frame assembly and a second frame assembly. The upper end of each stand column assembly is used for connecting two adjacent frame assemblies, the lower end of each stand column assembly is used for being connected with a to-be-fixed face, each stand column assembly comprises a stand column and an adapter installed at the upper end of the stand column, and the adapter is connected with the first frame assembly and the second frame assembly. In the application, compared with direct connection of two adjacent frame assemblies, the arrangement of the adapter can effectively transmit and disperse the load between the two adjacent frame assemblies, so that the overall stability and bearing capacity of the frame structure can be significantly enhanced, the photovoltaic sunshade can more effectively resist the external environment, and the service life of the photovoltaic sunshade is prolonged. And the working stability and reliability of the photovoltaic sunshade are improved.

The application discloses a federated learning backdoor attack detection method and system based on double-layer processing, the method comprises the following steps: a server receives model parameter update vectors uploaded by each client after local training according to global model parameters of this round; double-layer processing including dimension-level normalization and residual scaling is performed on the model parameter update vectors of each client; model alignment indicators and mainstream symbol alignment indicators are calculated for the model parameter update vectors after double-layer processing; abnormal clients are removed and candidate clients meeting the requirements are screened out according to the two indicators; and global model parameters for the next round are aggregated and generated according to the model parameter update vectors of the candidate clients. The application aims to introduce an effective preprocessing mechanism, amplify the malicious and benign update difference, identify abnormal clients, improve the accuracy and robustness of the abnormal detection, and effectively prevent malicious update backdoor attacks in federated learning.

This invention discloses a multi-resource, multi-stage operation method for power distribution networks to cope with natural disasters and human attacks. The method assumes a high-risk, low-probability event of attackers launching malicious attacks after a natural disaster. It considers multiple resource types, including gas turbines, SESS (Self-Enhanced Energy Storage), MESS (Self-Enhanced Energy Storage), RC (Resistant Power Storage), and NR (Normative Energy Storage), and their coupling relationships. Based on the time difference between the natural disaster and the human attack, the operation process of the power distribution network is divided into five stages. In the context of power grid-transportation network coupling, the impact of the dynamic changes in schedulable resources and traffic flow at each stage on the movement of mobile energy storage and the repair process by emergency repair personnel is considered to establish an optimized scheduling model for each stage of the power distribution network. The model is then transformed into a five-level mixed-integer linear programming problem that can be solved using mature commercial optimization software, based on time-series relationships. This method can ensure power supply to the load and reduce system operating costs under extreme scenarios through flexible coordination among multiple resource types, effectively improving the resilience of the power distribution network.

The present invention relates to the field of system security software vulnerability defense, and discloses a code reuse attack defense method based on real-time loading of gadget quality, comprising the following steps: obtaining a program code segment in a preprocessing stage, and performing static analysis on the instructions of all functions in the code segment to obtain the total number of gadgets in the entire program; evaluating the danger level of the obtained gadgets; initializing the thread pool, the standby area and the execution area, and storing gadget information in the initialization stage; monitoring the parent process in the real-time loading and unloading stage, and running the executable program by the child process; loading when 0xCC is found, and unloading when the parent process monitors the total number of gadgets in the execution area or the total danger level score of gadgets in the execution area exceeds a set threshold. The method disclosed by the present invention can load and unload in a more fine-grained manner, greatly reducing the attack surface and danger level.

The present invention provides a near-destination DDoS defense method based on bidirectional source address verification (SAV‑B). The method deploys SAV‑B devices near the DDoS attack target (i.e., the protected area). The SAV‑B devices are used to collect five-tuple information of network data packets transmitted into and out of the network. The five-tuple information includes source IP address, destination IP address, source port number, destination port number, and transmission protocol. An efficient hash function is used to generate a hash digest for the information. The hash digest is used to verify the authenticity of the source address of the data packet to achieve efficient and accurate source address verification. This dynamic update and verification mechanism enables the SAV‑B device to adapt to changes in the network environment and emerging security threats, thereby providing an efficient defense method for ensuring network security.

The invention discloses a frame structure and a photovoltaic sunshade. The frame structure comprises a plurality of frame assemblies, a cross beam assembly, a plurality of stand column assemblies and at least two supporting column assemblies. The plurality of frame assemblies are used for installing a photovoltaic assembly, at least one frame assembly comprises at least two sub-frame assemblies, and the tail end of one of the at least two sub-frame assemblies is connected with the head end of the other sub-frame assembly. The upper ends of the stand column assemblies are used for connecting two adjacent frame assemblies, and the lower ends are used for being connected with a to-be-fixed face. The upper end of the supporting column assembly is used for being connected with one of the at least two sub-frame assemblies, and the lower end is used for being connected with a to-be-fixed face. In the application, the stand column assembly and the support column assembly can jointly support the frame assembly on the to-be-fixed surface, so that the deformation and damage of the frame assembly caused by insufficient support of the large-size frame assembly are avoided.

The invention relates to an anti-defense gene gad1 from a cold spring, a screening method, an activity determination method and application thereof, and particularly discloses the anti-defense gene gad1 from the cold spring, and the nucleotide sequence of the anti-defense gene gad1 is as shown in SEQ ID NO: 1. The anti-defense gene gad1 provided by the invention is derived from the cold spring virus, the sequence and the structure of the anti-defense gene gad1 can adapt to extreme environments such as low temperature and high pressure, the anti-defense activity is exerted, and the stable activity is kept in the ecological niche.

The present invention discloses a network management method, device, medium and computer program product, which relates to the field of communication technology, including: obtaining the historical IP address allocation data and current network status of all network devices under each virtual local area network; predicting whether there are IP addresses that will be repeatedly allocated according to the historical IP address allocation data and the current network status; if it is predicted that there are IP addresses that will be repeatedly allocated, reallocating IP addresses to target network devices and adjusting network configuration; the target network devices are network devices that have been allocated IP addresses that are predicted to be repeatedly allocated. The method predicts whether an IP address conflict will occur, takes optimization measures before an IP address conflict occurs, realizes effective defense against IP address conflicts, and can improve the stability and reliability of the network.

The utility model relates to gas detection equipment technical field, the utility model provides a kind of split type gas detector of anti-radiation, including outer bucket, composite bucket for reinforcing structural strength is coaxially sleeved in outer bucket from outside to inside sequentially, first shielding barrel for absorbing neutron and second shielding barrel for shielding gamma ray, gas sensing element is limit installed in second shielding barrel by support, gas diffusion hole that is sequentially penetrated second shielding barrel, first shielding barrel, composite bucket and outer bucket is established in gas sensing element below, and the heat dissipation cavity formed between the outer side wall of first shielding barrel and the inner side wall of second shielding barrel, second shielding barrel is provided with the air inlet pipe and the air outlet pipe being communicated with heat dissipation cavity, air inlet pipe and air outlet pipe are all connected in driven pump, the effective resistance to mixed radiation is realized, adapts complex radiation environment, simultaneously through gas circulation sustained transfer heat dissipation cavity heat, stable control detector internal temperature to meet the demand of radiation scene heat management.

The invention discloses a system with the function of actively defending against unmanned aerial vehicles, including a main control room, a frame body is provided on the upper end face of the main control room, and a first exposure hole is evenly provided on the side of the frame body, and a second exposure hole is provided on one side of the first exposure hole, and an electromagnetic jammer is provided in the first exposure hole, and a transmission plate is provided at the rear end of the electromagnetic jammer, and an electric telescopic rod is hinged on the upper end face of the main control room, and the upper end of the electric telescopic rod is hinged with the transmission plate, and a gear is rotatably connected to the lower end of the second exposure hole, and a wide-angle camera is provided on the upper end face of the gear, and a motor is provided on one side of the second exposure hole on the upper end face of the main control room, and a gear is provided on the output end of the motor, and an ultrasonic bird repellent is provided at the center position of the upper end face of the main control room, and a support rod includes a fixed rod and a movable rod, and the fixed rod is connected to the upper end face of the main control room, and a shock absorbing spring is provided between the fixed rod and the movable rod, and a protective plate is provided on the upper end of the movable rod. The advantages of the invention are that it can effectively defend against unmanned aerial vehicles, can drive away birds, and is flexible and convenient to use.

The invention discloses a flow control intelligent layered water injection device and method. According to the device, an integrated sealing design is adopted, a flow measurement module, a pressure and temperature sensing module, an electric control execution module and a data processing module are highly integrated in a firm shell, and the device adapts to an underground severe environment and is high in reliability. Two-way communication between the ground and the underground is achieved through the cable-free flow wave coding technology, specifically, the ground gives an instruction by modulating injected water flow, an underground device obtains a target value by analyzing flow change and drives an adjustable water nozzle to accurately adjust the flow of the layer, and meanwhile characteristic flow fluctuation can be actively generated to feed back the state to the ground. According to the method, a traditional cable is abandoned, remote, independent and closed-loop intelligent control over the water injection flow of each layer is achieved, and the refinement level of water injection operation and the oil reservoir recovery efficiency are greatly improved.

The invention discloses a network threat sensing method, device and equipment based on user habits. The method comprises the following steps: collecting behavior data of a user on a network; establishing a behavior reference model of the user by utilizing the behavior data of the user on the network, and describing normal behavior modes and habits of the user based on the behavior reference model; the network behavior of the user is monitored in real time and compared with the behavior reference model, so that whether an abnormal behavior exists or not is detected; identifying and analyzing abnormal behaviors based on a machine learning algorithm or a statistical method, determining whether security threats exist, and sending an alarm and a notification to an administrator; if security threats are found, security measures are taken; and improving and optimizing the behavior benchmark model based on the network activity data information collection of the user so as to improve the network security. According to the invention, potential security threats can be found and dealt with timely, so that the network security is improved, and the network security risk is reduced.

The present application relates to a virus identification and defense method, device, storage medium and equipment, the method comprising: identifying malicious programs through host behavior analysis; identifying the logs of malicious programs to determine the attack behavior of malicious programs; and using corresponding preset strategies to defend against the attack behavior of malicious programs according to the attack behavior of malicious programs. The present invention identifies malicious programs through host behavior analysis, and based on the identification of the logs of malicious programs, various behavioral actions generated by malicious programs and their effects and intentions are determined, and finally the attack behavior is determined, so that the corresponding response strategy can be used to effectively defend against the attack behavior, thereby realizing accurate identification and linkage defense against unknown ransomware viruses.

This utility model discloses a puncture-resistant food packaging bag, belonging to the field of packaging bag technology. The key technical points are: it includes a packaging bag body, which comprises an outer packaging layer, a middle partition layer, and a puncture-resistant layer. The outer packaging layer, the middle partition layer, and the puncture-resistant layer are sequentially laminated from the outside to the inside. The outer packaging layer is made of plastic, the middle partition layer is made of nylon, and the puncture-resistant layer is made of polyethylene fiber. The packaging bag, through the contact between the puncture-resistant layer made of polyethylene fiber and the sharp corners, can effectively resist the sharp corners of the sharp corners, thereby improving the puncture resistance of the packaging bag and preventing the packaging bag from being punctured by the sharp corners of the sharp corners.

This invention provides a door assembly structure and vehicle, belonging to the field of automotive door technology. It includes an inner door panel and an outer door panel, with an outer panel reinforcing plate, an outer panel support plate, a door anti-collision beam, and a door lock reinforcing plate disposed between the inner and outer door panels. The outer panel reinforcing plate, outer panel support plate, and door anti-collision beam are arranged sequentially from top to bottom. The door assembly structure provided by this invention utilizes a first force transmission channel and a second force transmission channel to transmit the impact force of a side impact on the door assembly to the vehicle body, reducing the degree of inward indentation of the door, ensuring door strength, improving its rigidity, and achieving improved NVH performance. The structure is arranged in three directions (X, Y, and Z) to ensure that the structure can transmit force in each direction. The triangular adhesive area forms an adhesive fixation for the outer door panel, significantly improving the stability of the outer door panel installation.