185results about How to "Reduce the spread" patented technology

A light fixture and method for producing downward-propagating illumination are disclosed. The fixture includes an edge-lit lightguide illuminated from its perimeter. The lightguide has a light extractor, such as a dot pattern on its bottom surface, which extracts a portion of the light from inside the lightguide and directs it to a diffuser. The diffuser randomizes the direction of the extracted light and forms diffuse light. The fixture also includes a downlight, arranged above the lightguide and producing a downlight beam downward. The downlight beam transmits from the top face through the bottom face of the lightguide and emerges from the bottom face of the lightguide as a directional beam. The downlight beam has a downlight beam footprint. The light extractor has a light extractor area that excludes the downlight beam footprint, and the diffuser has a diffuser area that also excludes the downlight beam footprint. The fixture can produce both diffuse light and a directional beam, while maintaining a generally uniform external appearance.

The invention discloses a partitioned block chain network. The block chain network consists of multiple nodes; according to visible permissions of the nodes to different transaction data, part or allof the nodes are divided in one or more partitions; the interior of the same partition is completely visible for the transaction data, and different partitions are invisible for the transaction data;according to the permissions of the nodes participating in a consensus process, all the nodes are classified: the nodes capable of participating in the consensus process of all the partitions are global consensus nodes, the nodes only capable of participating in the consensus process of the partitions where the nodes are located are partition consensus nodes, and the nodes incapable of participating in any consensus process are synchronous nodes; each node has a partition identifier; and each node stores transaction fingerprints of all historical transaction data. By partitioning and classifying the nodes in the block chain network, the query of the historical transaction data is limited in the same partition, so that the propagation range of the historical transaction data is greatly reduced and the data privacy protection effect is improved.

The invention discloses an intelligent contract security vulnerability mining method and system based on artificial intelligence. The invention provides an intelligent contract security vulnerabilitymining method based on artificial intelligence. The method comprises the following steps of disassembling a binary system of the intelligent contract according to an instruction set of an intelligentcontract, converting the system into smart contract assembly, dividing the byte code into different modules according to an intelligent contract byte code jump instruction; and then according to thesource code block and the target code block of the jump instruction, generating a control flow graph of the intelligent contract byte code for deep learning, thereby greatly reducing the manual intervention cost, and furthest avoiding negligence on security vulnerability detection caused by manual intervention errors in other defenses. The technology disclosed by the invention can be applied to anindustrial platform in a large range; the technology disclosed by the invention has an intelligent learning function, and when a novel vulnerability sample is found, the characteristics of the vulnerability sample can be quickly learned, so that the large-range diffusion of vulnerabilities is avoided.

The embodiment of the invention provides a block chain hierarchical consensus method, a block chain network system and a block chain node, and belongs to the technical field of block chains. The method comprises the steps: service data to be subjected to consensus is acquired, and a visible permission of the service data is determined; when the visible permission is a first-class visible permission, the service data is sent to a consensus node in a local chain to be subjected to consensus processing through the consensus node in the local chain; when the visible permission is a second-class visible permission, the service data is sent to a consensus node in a global chain to be subjected to consensus processing through the consensus node in the global chain. It can be seen that the servicedata can be shared selectively in the local chain or the global chain on the basis of the different visible permissions of the service data, that is to say, when the number of Internet of Things nodes is large and the network environment is diverse, the data can be selectively opened according to the trust and data privacy degree, therefore, the propagation range of the service data is greatly narrowed, and the data privacy protection effect is improved.

The invention discloses a robust covariance matrix diagonal loaded adaptive beam-forming method and mainly solves the problem of loading coefficient determining in the adaptive diagonal loading method in the prior art. The scheme includes: (1) calculating a covariance matrix of radar antenna array receiving signals; (2) solving a linear combination expression of adaptive weight vectors by aid of steering vectors of radar antenna array target signals; (3) solving an identical transformation expression of radar antenna array output power through the covariance matrix and the weight vector expression and defining the remained vectors; (4) constructing a covariance matrix of the remained vectors; (5) leading an inverse matrix of the covariance matrix of the remained vectors to serve as a weighting matrix in a two-step weighted least squares theory and solving loading coefficients of the covariance matrix of the radar antenna array receiving signals; and (6) calculating the adaptive weight vectors to perform beam-forming. The robust covariance matrix diagonal loaded adaptive beam-forming method improves beam-forming performance by adding a noise matrix to reduce covariance matrix eigenvalue dispersion degree.

The invention relates to a method for dyeing textile materials and products thereof, and belongs to the field of textile printing and dyeing processing. In the method, prepared dye solution is subjected to ultrasonic atomization to form dye solution microbeads, and the dye solution microbeads directionally infiltrate the textile under the action of certain pressure and an electric field so as to complete the dyeing process. Due to the adoption of the technical scheme, dye solution atomized microbeads prepared from the dye solution through a high-frequency ultrasonic atomizer have smaller grain size, a small dispersion range on the textile and more fine and smooth dyeing effect; the dye solution atomized microbeads enter fibers more easily under the action of the air pressure and the electric field, and have better dyeing effect; and the atomized microbeads carry less solution, the utilization rate of the dye is high, water can be saved and the environmental pollution is lightened. The dyeing method has a wide application range, low energy consumption and light pollution, and is suitable for small-batch and multi-variety printing technology development direction.

A method and apparatus for generating high-energy beams of electrons or x-rays through laser wakefield acceleration to remotely examine containers is disclosed. By scanning the beam of electrons or x-rays across a container, an inspector can remotely determine whether the containers contain items of interest, such as special nuclear materials, without having to manually inspect the contents of the container. The invention can be compact enough to be portable, which provides for the flexibility to examine a variety of different containers under a variety of different conditions.

A projector includes a light source, a first light separation optical system adapted to separate light emitted from the light source into first light and second light, a second light separation optical system adapted to separate the first light into third light and fourth light, separate the second light into fifth light and sixth light, and emit the third light, the fourth light, the fifth light, and the six light in directions intersecting with a plane including a light axis of the light emitted from the light source and a light axis of the first light, and a light modulation element which the third light, the fourth light, the fifth light, and the sixth light enter.

The invention discloses a radar detection method based on multi-frame joint for moving target tracks. The radar detection method comprises the steps of: using echo data to obtain amplitude values at corresponding resolution cells; setting a primary constant false-alarm detection threshold to carry out filtering on the amplitude values and acquiring the filtered amplitude values; calculating value functions of the resolution cells and acquiring speed correlation track recursion accumulation value functions of the echo data of each frame of the value functions of the resolution cells; setting a secondary detection threshold, and acquiring the resolution cells where moving targets exceeding the secondary detection threshold are located; conducting backtracking processing on the data to obtain the resolution cells where the echo data of each frame of all moving target tracks are located; and acquiring all moving target tracks, and determining true moving target tracks from all the moving target tracks. The radar detection method based on multi-frame joint for moving target tracks introduces a correlation speed algorithm, and can realize detection and tracking of moving targets under low SNR.

The invention discloses a detection method for radar target tracks on basis of correlation speeds, and relates to the technical field of radars. The method includes the first step of using echo data to obtain amplitude values at corresponding resolution cells, the second step of setting a primary constant false-alarm detection threshold to carry out filtering on the echo data and obtaining the amplitude values after filtering is conducted, the third step of setting value functions of the resolution cells, the fourth step of calculating value functions of speed correlation track recursion accumulation of the accumulated echo data of each frame, the fifth step of setting a secondary detection threshold and obtaining the resolution cells where targets exceeding the threshold are located, the sixth step of conducting backtracking processing on the data to obtain the resolution cells where frames of all tracks are located, and the seventh step of determining true target tracks from all the tracks. A correlation speed algorithm is introduced, the processing data size is reduced, mistaken correlation of the target tracks is reduced, false tracks are reduced, and mechanical multi-target tracking under low an SNR is achieved.

The invention discloses a thin-layer limestone ground directional drilling horizontal multi-stage branch grouting drill hole. The thin-layer limestone ground directional drilling horizontal multi-stage branch grouting drill hole comprises a ground main hole. The ground main hole vertically extends to the underground, penetrates through a vertically-drilled straight hole section of a base rock layer from the ground to the underground and downwards penetrates through an ash consequently-drilled bedding section along a coal bed. A kickoff point is arranged at the end, away from the ground and close to the coal bed, of the straight hole section. Inclined drilling is conducted between the kickoff point and the middle of lime-cement-flyash below the coal bed, so that a directional inclination guide section is formed. The two ends of the directional inclination guide section communicate with the straight hole section and the bedding section correspondingly. The main hole bedding section is divided into a plurality of first and second stage branch holes distributed in a fan shape in the approximately horizontal direction of the bedding section. By adopting the technical scheme, compared with the former conventional water control technology, the safe reliability is greatly improved, deep mining bottom plate limestone water disaster governance is achieved, bottom plate water disaster accidents are avoided, and safety production is ensured.

The object of the present invention is to enable the optical axis of an electron beam of a field emission electron gun mounting thereon an electron gun composed of a fibrous carbon material to be adjusted easily. Moreover, it is also to obtain an electron beam whose energy spread is narrower than that of the electron gun. Further, it is also to provide a high resolution electron beam applied device mounting thereon the field emission electron gun. The means for achieving the objects of the present invention is in that the fibrous carbon material is coated with a material having a band gap, in the field emission electron gun including an electron source composed of a fibrous carbon material and an electrically conductive base material for supporting the fibrous carbon material, an extractor for field-emitting electrons, and an accelerator for accelerating the electrons. Moreover, it is also to apply the field emission electron gun to various kinds of electron beam applied devices.

The invention relates to a monitoring device, in particular to a system for monitoring and orientating an electric power quality pollution source in an electric network. The system provides the monitoring and the orientation of a voltage swell / dip pollution source in the electric network: a wavelet analysis method is used for the first time to capture the voltage swell / dip from the real-time voltage waveform, and as long as a corresponding transient course is monitored, the effective value change curve of the line current is monitored and whether the voltage swell / dip is related to the line is judged, thereby achieving the purposes of monitoring and orientation of the voltage swell / dip. Besides, the system further provides the monitoring and the orientation of a harmonic-wave pollution source and a flickering pollution source. The system realizes the function of the on-line orientation of the electric power quality pollution source for the first time, provides effective centralized processing for the power supply system, avoids the widespread propagation of the polluted signals, improves the power supply quality of the electric network, and provides the uniform standard and theoretical foundation for the solution of the electrical energy pollution source, thereby being of great significance to the technological development of the monitoring and the orientation of the pollution source in the electric network.

The invention relates to a monitoring device, in particular to a monitoring and orientation system of pollution sources of electrical energy quality. The system provides monitoring and orientation of flickering pollution sources of an electrical network, realizes conjoint analysis of voltage signals and current signals for the first time, identifies the sources of flickering pollution components contained in load voltage or load current to achieve the technical purpose of flickering pollution orientation, and further provides monitoring and orientation of harmonic pollution sources and monitoring and orientation of sudden rise and sudden drop of voltage. The system realizes the on-line orientation function of the pollution sources of the electrical energy quality for the first time, provides effective centralized processing for a power supply system, avoids large-scale propagation of pollution signals, improves the power supply quality of the electrical network, provides unified standards and a theoretical basis for the solution of the pollution sources of the electrical energy, and has significance for technical development of monitoring and orientation of the pollution sources of the electrical network.

The invention discloses a ground leveling vehicle for municipal construction. The ground leveling vehicle comprises a vehicle body. An upper limit plate and a lower limit plate are fixedly horizontally installed in the vehicle body. A water collection sleeve and a water tank communicating with the water collection sleeve are fixedly vertically installed on the vehicle body. A check valve II is installed on a water inlet tube. Lower connecting rods are fixedly installed on the lower sides of shaft sleeves. Push rods are hinged to the lower ends of the lower connecting rods. Stamping boards arehorizontally fixedly installed at the lower ends of the push rods. The side wall of the vehicle body is horizontally rotationally provided with a driving shaft. Walking wheels are sleeved and fixed onthe surface of the driving shaft. According to the invention, when a vehicle body walks, a crankshaft is driven to rotate to realize the upward and downward reciprocating motion of the stamping boards, thereby achieving repeated stamping on the ground, the ground leveling effect is good, the leveling area is easy to adjust, a piston head reciprocates in the water collection sleeve, so that waterspray discs intermittently spray water, the effects of dust reduction and dust removal are achieved, and a wide range of dust spread in the ground leveling process is avoided.

The invention discloses an underwater towing body controlled by a front-edge-rotating cylindrical wing. Forced sinking hydrofoils of the underwater towing body adopt symmetrical airfoil profiles, andare symmetrically arranged on the two sides of the front portion of a main cavity, two rotating cylinders are symmetrically arranged at the front ends of the profile faces of the forced sinking hydrofoils relative to the main cavity, and are connected with a speed adjusting motor located inside the main cavity through rotating-cylinder rotating shafts; ducted propellers are symmetrically arrangedon the two sides of the back ends of the forced sinking hydrofoils; a transverse horizontal fixed empennage is arranged at the tai lend of the main cavity, and vertical streamlined flap type rudders are symmetrically arranged at the two ends of the transverse horizontal fixed empennage respectively; a flap is arranged at the tail end of each vertical streamlined flap type rudder, and is connectedwith a flap angle control device. According to the underwater towing body controlled by the front-edge-rotating cylindrical wing, by changing the rotating speeds and the rotating directions of the rotating cylinders at the front ends of the forced sinking hydrofoils, attack angles of the forced sinking hydrofoils can be efficiently and flexibly adjusted, and the aim of changing the motion trail ofthe vertical direction of the towing body is achieved; on this basis, the thrust directions of two-side propellers are changed through assisting, and directional floating and sinking can be achieved.

The invention discloses a method for preparing a YAG-based multilayer composite transparent ceramic by using Isobam gelcasting. The prepared multilayer ceramic satisfies a structure shown by a following formula: YAG / Re:YAG / YAG or YAG / Re: YAG / Re:YAG, wherein the YAG layer is composed of Y3A15O12, the Re:YAG layer is composed of (Y<1-x>Re<x>)<3>A<15>O<12>, x is more than or equal to 0.02 and is lessthan or equal to 0.2; Re is one of rare earth elements of cerium, praseodymium, neodymium, samarium, europium, terbium, dysprosium, holmium, erbium, thulium or ytterbium. The method comprises the steps that firstly Isobam gelcasting slurry is prepared, then the slurry is defoamed and is cast into a mold, after a first layer of the slurry gel is cured, the other layer of slurry is poured, the slurry is completely gelled, drying treatment is conducted, and the gel is discharged; biscuit after discharging the gel is vacuum sintered and annealed, and after double-sided polishing, the multilayer composite transparent ceramic is obtained. The method provided by the invention is mainly water-based slurry, green and environmentally friendly, and the obtained ceramic has the characteristics of high density, complicated structure, good optical quality, high transmittance, small interfacial ion diffusion range, and the method is very suitable for the preparation of the large size and composite YAG-based transparent ceramic material.

The present invention relates to a stain removal device, which enables hands to carry out stain removal operation at steady beating strength and beating speed all the time without fatigue,and can steadily provide liquid for stain removal. The stain removal device(100) comprises: a head part(1),which is provided with a beating face(111); a vibrator unit(2), which eables the head part(1) and the beating face(111) to vibrate in the substantially orthogonal direction by power supply; a liquid holding part(3), which holds liquid, and a water supply way(4), an end(41a) of wihch is connected to the liquid holding part(3) and the other end(1121h) of which opens around the head part(1); with the vibration of the head part(1) caused by the vibrator unit(2), the liquid is provided form the other end(1121h) of the water supply way(4) to around the head part(1).

Radiation occurs when current is injected into an active layer from electrodes. A pair of clad layers is disposed sandwiching the active layer, the clad layer having a band gap wider than a band gap of the active layer. An optical absorption layer is disposed outside at least one clad layer of the pair of clad layers. The optical absorption layer has a band gap wider than the band gap of the active layer and narrower than the band gap of the clad layer. A spread of a spectrum of radiated light can be narrowed.

In an embodiment of the present invention, in a liquid crystal display device which controls a light luminance of each of lighting regions, each of lighting regions of a backlight has a smaller width in a horizontal direction than in a vertical direction. This makes it possible to cause a reduction in contrast due to spatial distribution of light luminances, which spatial distribution is generated due to cross talk between lighting regions, to be less perceivable to an observer positioned in an oblique viewing direction.

The present invention belongs to the field of agricultural facilities, and relates to a confined poultry house winter ventilation system and an air distribution method. the system comprises air inlet windows (2), hencoops (3), negative-pressure air fans (6), vertical walls (7) and gable walls (8), wherein passages are formed among different hencoops (3) and between the outmost hencoops (3) and the vertical walls (7), the air inlet windows (2) are uniformly arranged on upper parts of the vertical walls (7) at two ends, a plurality of guide devices (1) are arranged in a parallel and staggered manner at a roof part corresponding to the passages, trench exhaust outlets (4) are arranged at a distance on the ground of the passages, an exhaust trench (5) is arranged lengthwise on the ground of each passage and is connected with the trench exhaust outlet (4) inside the passage, and the negative-pressure air fans (6) are installed on the gable wall (8) at one end and are communicated with the exhaust trenches (5) through pipelines. With adoption of the confined poultry house winter ventilation system and the air distribution method, differences in temperature and air qualities among different passages and different hencoop layers can be effectively reduced, and air is orderly and uniform in distribution.

The invention discloses a distributed informing system and an informing method. The distributed informing system is characterized by comprising a data acquisition device, a database, a content editing device, an information visualizing device, an information filtering device, an information release device, an information receiving and presenting device, a user behavior device and a user authority management device. The method includes data acquisition, information editing, information visualization, information production, information filtering, information release, information receiving and presenting, and news sharing and release, so that information is produced and released. The system and the method are favorable for numerous enterprise operators to obtain accurate, timely, comprehensive and visual information conveniently at low cost.

The invention discloses a high-grade biosafety protection type air propagation experimental device for pathogens of medium and small animals. The high-grade biosafety protection type air propagation experimental device can be used for carrying out a droplet propagation experiment on the medium and small animals such as rats, mice, martens and rabbits. The high-grade biosafety protection type air propagation experimental device comprises a biosafety cabinet, wherein the biosafety cabinet comprises an exposure cavity for accommodating healthy animals and bacteria-carrying animals; a sealed experimental box is arranged in the exposure cavity; the healthy animals and the bacteria-carrying animals are placed in the experimental box; the biosafety cabinet is provided with an air supply filteringdevice and an air exhaust filtering device; the air supply filtering device is used for supplying air into the exposure cavity; the air exhaust filtering device is used for purifying air in the exposure cavity and exhausting the air; the experimental box comprises an air inlet and an air outlet; the air inlet communicates with the air supply filtering device; and the air outlet communicates withthe air exhaust filtering device. According to the technical key points, the experimental animals are placed in the experimental box and the propagation experiment is not directly carried out in the biosafety cabinet, so that the pollutant diffusion range is reduced and the experiment is safer; and the section of the droplet propagation experimental box is small and an accurate experimental resultis easy to obtain.

The invention provides a water pressure blasting method used in tunnel construction, and relates to the blasting method used during tunnel construction. The method is mainly invented for solving the problems that at present, a conventional blasting method used in tunnel construction causes large rock ballast blocks and much raised dust and is wide in pile bottom diffusion range, low in residue loading work efficiency and low in work efficiency. Firstly, a shot hole is punched, a water bag is arranged at the bottom in the shot hole, charge is arranged above the water bag, two water bags are arranged above the charge, and finally the shot hole is refilled with and plugged by stemming. The method has the advantages that raised dust is little, rock ballast is well smashed, stone is small, the work environment is improved, the residue loading work is easily conducted, and time is saved by half an hour or longer.

The present invention discloses a hypertext transfer protocol secure (HTTPS) service deployment method. The method comprises the following steps that a private key server is set, and a content distribution network (CDN) node downloads an encrypted private key and a decryption method from the private key server and stores the encrypted private key and the decryption method in a memory of the CDN node; when a client and a server shake hands, the server uses the private key to decrypt, and uses the decryption method in the memory to decrypt a secret key, so as to complete a handshake process; after the handshake process is completed, a plaintext private key is emptied immediately; after handshake succeeds, the client and the CDN node communicate through symmetrical secret keys; and the CDN node forwards a client request to a source station, and returns a feedback result of the source station to the client, so as to complete an access process. According to the method, the private key is not deployed in the CDN node, the encrypted private key is deployed in the private key server, the private key is encrypted and the encrypted private key and the corresponding decryption method are used as data to transmit and store, the client uses the data in the memory to access without being intervened by the private key server, so that the performance and reliability of the system are improved.

An optical fiber for reducing modal dispersion and increasing both travel distance and transmission speed. A core center is formed in the core of the optical fiber. The core center is doped with impurities, is hollow, or is pulled at a lower temperature to increase diffraction of the core center. The core center discriminates the low order modes such that only the high order modes are present in the optical fiber. Because the low order modes are absorbed or otherwise discriminated against, the range of propagation constants is reduced and modal dispersion is likewise reduced. High order modes can be launched in the optical fiber using a lens whose center portion is obscured or by using a diffractive lens to couple a source to the optical fiber.

The invention relates to a foam extinguishing agent containing a biosurfactant and a preparation method for the foam extinguishing agent. The problems that an existing foam extinguishing agent is liable to pollute the environment and the preservation time is short are mainly solved. The foam extinguishing agent containing the biosurfactant comprises, by weight, 10%-30% of rhamnolipid, 3%-15% of sophorolipid, 0.1%-0.5% of a thickening agent, and the balance water. The preparation method for the foam extinguishing agent comprises the steps that under the stirring condition, the rhamnolipid is added into a certain amount of water, and after even stirring, the sophorolipid is added; after even mixing, the mixture is heated to 80 DEG C-90 DEG C in a reaction kettle; after the mixture is cooled to the room temperature, sodium alginate is dissolved with 10% of water and added to the reaction kettle; and the balance water is added as a complement, and the mixture is mixed evenly. According to the foam extinguishing agent containing the biosurfactant, the fire extinguishing performance of the extinguishing agent can be improved, fast biodegradation of pollutant in a place where a fire disaster occurs is achieved, and thus the environment is protected.

The present invention relates to a system and method for generating and managing bait orders in high performance computer systems, in particular it relates to a computer system and method for bait generation in high performance trading systems. The present invention removes bait orders when the base order has changed in such a way so that the bait order is not tradable. Thereafter the invention regenerates the bait order at a later time.

The invention discloses a sound-absorbing and noise-reducing floor for a library, which comprises a wear-resistant layer. The bottom of the wear-resistant layer is provided with a decorative layer. The bottom of the decorative layer is provided with a sound-absorbing layer. A through hole, the inner cavity of the through hole is provided with sound-absorbing cotton, and the wear-resistant layer, the decorative layer, the sound-absorbing layer and the substrate layer are stacked in sequence and bonded together by an adhesive, and the bottom of the substrate layer is provided with There is a shock-absorbing post, the shock-absorbing post is arranged in the inner chamber of the shock-absorbing groove, a first spring is connected to the side wall of the shock-absorbing post, and the other end of the first spring is connected to the inner wall of the shock-absorbing groove, A second spring is connected to the bottom of the shock-absorbing column, and the other end of the second spring is connected to the bottom of the shock-absorbing groove, and the shock-absorbing groove is arranged in the inner cavity of the supporting column, and the supporting column is located on the substrate layer bottom of. The sound-absorbing and noise-reducing floor of the library can reduce the possibility of noise generation, weaken the generated noise, and reduce the range of noise transmission.