78results about How to "Reduce interception" patented technology

A signal processing method comprises the steps of: inputting three signals specifying a color of one pixel; and generating four signals from the input three signals, wherein each of said four signals represents intensities of four different colors to display a color of one pixel by mixing colors, wherein said generating step includes a first converting step of converting the input three signals to two signals representing intensities of two colors among the four colors and a signal representing intensity of a mixed color obtained by mixing (a) the four colors or (b) a plurality of colors among the four colors; and a second converting step of converting the signal representing intensity of the mixed color to a plurality of signals representing intensities of a plurality of colors including at least other two colors different from the two colors.

The invention discloses a feedback information and multi-path routing based wireless sensor network data transmission method which comprises a feedback information based safety routing structure, multi-path routing establishment and multi-path routing transmission application. According to the feedback information and multi-path routing based wireless sensor network data transmission method, in the multi-path routing aspect, the multi-path routing protocol of on-demand routing is mainly adopted, and multiple maximum disjoint routing paths are established, and therefore network congestion is prevented, and available wireless sensor network resources are effectively initialized. Through the feedback information based safety routing structure, feedback paths can be obtained from Sink node for an originating node of data transmission. When the originating node receives enough feedback paths from the Sink node, the paths can be utilized for multi-path data transmission with combination of multi-path routing.

The invention discloses a preparation method of a sandwich type anti-microbial composite nanometer filtering material for scavenging formaldehyde with high efficiency and low resistance, and the method comprises the following steps: a nanoparticle bonding solution is prepared; nanoparticles are coated; spinning liquid is prepared; a nanometer fibrous layer is formed by electrostatic spinning; a covering layer is attached on the nanometer fibrous layer, in order to form a three-dimensional multidimensional sandwich structure which is composed of a supporting layer containing nanoparticles, thenanometer fibrous layer and the covering layer. The method has simple design technology, and the material has high filtering efficiency and low air resistance for PM 2.5; the material has small pressure drop and can dedust, so that the problems of low efficiency and high resistance of traditional air cleaning materials are overcome; the product is advantageous in that the material can precipitateharmful PM2.5, formaldehyde and a plurality of substances which are harmful for human bodies in indoor space or newly finished rooms in a short period of time, and the like; and at the same time, theproduct has excellent antibacterial properties and formaldehyde scavenging performance.

A card activated cash dispensing automated banking machine system and method is provided. The machine is operate to read a financial card bearing account indicia with a card reader of the machine. The machine enables a user to perform banking operations responsive to account indicia read from the card. Such banking operations may include dispensing cash and accessing financial accounts. While a user operates the machine to dispense cash or perform other banking operations, the machine may further permit at least one portable wireless device to wirelessly access the machine to purchase and wirelessly receive digital information such as music and/or video files from the machine.

A wireless ATM system (30) comprises one or more wireless ATMs (32, 34, 36) that are operative to wirelessly communicate with a wireless ATM server (38). The wireless ATMs each include a wireless network interface (41). The wireless ATM server includes a corresponding wireless access point or wireless hub (40). Wireless transmission between the wireless ATMs and wireless ATM server is secured with a wireless encryption protocol. The wireless ATM server is operative to communicate with at least one host banking system (46) through at least one public or private network (44). The wireless ATM server is operative to route transaction and event messages between the host banking system and each of the wireless ATMs using a message gateway router (43). The wireless ATM server further includes a firewall (42).

The invention relates to the field of information security, and provides an asymmetric secret key distribution and message encryption method based on identity information. The method comprises enterprise administrator initialization, a user registration process, a user point-to-point communication process and a user many-to-man communication process. User personal secret keys can be distributed more securely; secret key management systems can be constructed according to enterprises and conditions; the user public key management quantity can be reduced, and public key experiment of a user end is simplified; the probability that private keys are intercepted and stolen is reduced; the speed of a whole public key system and the operation feasibility can be improved; the adaptability of the public key system to mobile ends or other ends is enhanced; and a symmetric encryption system and an asymmetric encryption system are applied to an authentication and data transmission phase in a combined mode.

The invention provides a port-less shadow communication method and a computer storage medium based on a KCP protocol, wherein, the method comprises the following steps: a receiving end establishes a network communication control link with a sending end through a network card driving packet capture mode; a network communication data link is established between the receiving end and the sending endthrough the network communication control link; between the receiving end and the sending end, the data message is sent and received through the network communication data link based on the KCP protocol. The invention can effectively avoid the problems of poor concealment, easy detection and attack, single data verification and the like caused by monitoring the network communication port.

The invention relates to a data resource-based data crawling method and device, computer equipment and a storage medium. The method includes: receiving a data crawling request, and obtaining parametervalues of a normal-accessing user proxy according to the data crawling request; setting values of a user proxy of a web crawler as the parameter values to obtain an available web crawler; capturing valid IP addresses on a proxy website in preset time by using the available web crawler; binding the multiple valid IP addresses by using a proxy cache server, and generating a proxy IP address table according to the multiple valid IP addresses; and connecting the multiple valid IP addresses corresponding to the proxy cache server by using the available web crawler for data crawling. By adopting the method, passing of attribute detection of websites on the web crawler is facilitated, interception cases are reduced, an IP address used by the web crawler is replaced in time, an effect that the web crawler can use the valid addresses is guaranteed, and data crawling operations are realized.

The invention discloses a locking method for a remote user, and an unlocking method and device, relates to the technical field of network communication, and aims at solving the problem that the attack easily occurs while unlocking and locking the remote user and the safety is poor in the prior art. The locking method comprises the steps of receiving an encrypting command inputted by a user to encrypt an account; sending a first locking request to a security authentication server if the account cannot be successfully encrypted after inputting the encrypting command at preset times, wherein the first locking request carries the client identity verification information; if the first locking request is audited and passed by the security authentication server, locking the account.

The invention provides a grating lobe ambiguity resolution method applied to a sparse array broadband phased array. The method comprises the following steps: a sparse array broadband phased array equally divides the frequency of the working bandwidth within the range of the working bandwidth, and the sparse array broadband phased array transmits a transmitting signal with the frequency F1 and receives an echo; the transmitting frequency of the sparse array broadband phased array is switched to be F2-FN in sequence, echoes are received in sequence, and if no target exists at the moment, it is determined that the target exists at the position of the original grating lobe; and if the target exists, the target exists at the original signal receiving position. The calculation process of gratinglobe discrimination is the same as the calculation process of a common radar searching and tracking method, no extra calculation amount is increased, and therefore the method has the characteristicsof simplicity, practicality, small calculation amount and simple system; the broadband radar system performs frequency hopping, and has the characteristics of low interception and strong anti-interference capability; and frequency hopping of the broadband radar system can obtain the advantages of multipath resistance and good low-angle performance.

The invention relates to a solar steam generator. The solar steam generator at least comprises a supporting rack and a plurality of oblique solar heat collecting tubes which are arranged on the upper part of the supporting rack in parallel; each solar heat collecting tube comprises a glass vacuum tube, a strip heat absorption plate and a thermotube with two closed ends and a working medium inside; the upper heat exchange end of the thermotube is positioned outside the glass vacuum tube and extends into a pipeline so that the upper end of the solar heat collecting tube is provided with the pipeline for fluid to pass through; the supporting rack corresponding to each glass vacuum tube is provided with a plurality of reflecting mirrors arranged along the length direction of the glass vacuum tube in order that solar rays are converged on the corresponding light interception side of the heat absorption plate which is close to the supporting rack; the reflecting mirrors are symmetrically positioned on two sides of the glass vacuum tube and have different optical shafts; and the mirror face of the reflecting mirror can be a plane, a cylindrical surface, a parabolic cylindrical surface, the combination of the formers and any of combinations of two of the formers. The solar steam generator has low cost and can be used for large-scale industrialization.

The invention relates to the technical field of fluid machinery, particularly relates to a centrifugal pump. The centrifugal pump comprises a pump body, a bracket body, a pump shaft, an inner pump case, a front lining plate, a back lining plate, an impeller and a sealing packing device, wherein the sealing packing device is composed of a packing box, a packing shaft sleeve, a packing ring, packing and a packing gland. The centrifugal pump is characterized in that an O-shaped ring is arranged; the packing ring is formed by splicing at least two packing ring bodies together; the packing ring bodies are of ring shapes; the outside circumference of the packing ring body is provided with a positioning groove, and two ends of the packing ring body are respectively provided with annular grooves;the packing ring bodies are provided with water inlet holes in the radial direction; the water inlet holes are communicated with the positioning grooves; the interior of the annular groove is provided with disassembled screw holes; the O-shaped ring is fastened in the annular grooves on the two ends of the packing ring bodies and pieces the packing ring bodies to the packing ring; and the inner wall of the cavity of the sealing packing box is provided with a blocking ribbed plate. By adopting the structure, the centrifugal pump provided by the invention has the advantages of novel structure, good sealing effect and high stability, is convenient for disassembling and is rapid to install, abrasion rate is reduced, the service life is prolonged, and the like.

The invention solves a technical problem by providing a polyacrylonitrile based ultrafiltration membrane material with high throughput and a preparation method thereof. A technical scheme adopted is as below: the polyacrylonitrile based ultrafiltration membrane material with high throughput includes the components of, by weight, 15-25 parts of polyacrylonitrile, 50-60 parts of dimethyl acetamide solvent, 15-20 parts of polyethylene glycol (PEG400), and 1-1.5 parts of additive. By changing the components and ratio, the polyacrylonitrile based ultrafiltration membrane with high throughput, high efficiency and long service life can be prepared.

The invention discloses an oil cylinder and aims to solve the problems that in the prior art, oil in oil cylinders on fitness equipment is liable to leak, and the oil cylinders are not suitable for physical exercise of wide population. The oil cylinder comprises a cylinder block provided with a piston cavity. The piston cavity is provided with a piston rod capable of contracting into the cylinderblock or extending out of the cylinder block. An elastic piston which divides the piston cavity into a first secondary cavity and a second secondary cavity is arranged on the piston rod. The piston rod can drive the elastic piston to reciprocate in the piston cavity. The piston rod is provided with an oil drainage channel communicating with the first secondary cavity and a second secondary cavity.By driving the piston rod, the elastic piston is driven by the piston rod to move and better intercepts the oil drainage channel along with increase of driving force of the elastic piston; and by applying the oil cylinder on the fitness equipment, damping of the fitness equipment is increased automatically along with increase of force of exercisers, a medium circulates inside, compared with the prior art, the oil cylinder has the advantages of being suitable for wider population, simple in structure, low in production cost, capable of reducing oil pollution and the like.

The invention discloses an array element of a signal control array and the signal control array. The transmission signals of the array element are as shown in the specification, wherein Ak is a weighted value for reducing antenna beam minor lobe or resisting interference, f0 is initial frequency, k is the serial number of the array element, delta f is frequency shift, t is emission pulse width, M is an index, d is the space between the array elements, alpha 0 is beam pointing, lambda 0 is equal to c/f0, and c is velocity of light.

The invention discloses an airborne radar transmitted waveform selection method based on radio frequency stealth. The method comprises the following steps that S1, mutual information I(X1; Xk) betweena signal vector X1 received at the current moment and a signal vector Xk received at the k moment of an airborne radar are adopted to serve as radar target tracking property indexes; S2, KL distancebetween a joint probability density function of a airborne radar emission signal and an intercept receiver receiving signal and a probability density function product of the airborne radar emission signal and intercept receiver background noise is adopted to serve as a comprehensive property index to measure intercept receiver intercepting property and identifying property; S3, an airborne radar transmitted waveform selection model based on the radio frequency stealth is built according to a preset mutual information threshold Ith for representing the target tracking property; and S4, a wholewaveform self adaption selection process is completed according to the airborne radar transmitted waveform selection model based on the radio frequency stealth. The method provided by the invention improves the radio frequency stealth property of the airborne radar.

The invention discloses fabricated multi-stage flexible energy-dissipation height-limiting frames. The fabricated multi-stage flexible energy-dissipation height-limiting frames are arranged in an areaor a traffic safety management area where a road, a bridge, a tunnel, a pipe culvert and the like need to be protected, the positions of the height-limited frames which need to be set are selected according to the field condition, and each height-limiting frame adopts a fabricated structure and is provided with a multi-stage protection and flexible energy dissipation device and is used for reducing the maximum impact force of an impact vehicle, the first-stage protection is a high-damping rubber energy dissipation module on a thin-walled pipe cross beam, the second-stage protection is a shear-type buffer support, and the third-stage protection is a weak point where the thin-walled pipe cross beam is manually set at a flange at the weak end of the cross beam. Through the structural designthat the self-resetting capability is strong, the energy consumption is high, the light weight and modularization are achieved, the replacement and maintenance are convenient, and fabricated type full-bolts are connected, the limited vehicle can be effectively intercepted, vehicle damage is reduced, casualties are avoided, and road traffic safety and smoothness are guaranteed.