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220results about How to "Improve research" patented technology

Resource scheduling method under Hadoop-based multi-job environment

The invention discloses a resource scheduling method under a Hadoop-based multi-job environment, which includes: (1) collecting the three-party monitoring information of cluster loads, a Hadoop platform and hardware in real time; (2) collecting the job execution monitoring information of a user on each computing node of a cluster in real time; (3) gathering the three-party monitoring data of the cluster, modeling to evaluate the computing capabilities of the nodes, and dividing the nodes of the cluster into superior computing nodes and inferior computing nodes; (4) if the nodes are the superior computing nodes, then starting a job task resource demand allocation policy based on similarity evaluation; (5) if the nodes are the inferior computing nodes, then returning to a default resource demand allocation policy of the Yarn. The resource scheduling method under the Hadoop-based multi-job environment solves the problem of resource fragments caused by oversize job resource demand division granularity in conventional resource schedulers of the Yarn, can comprehensively take the heterogeneity of cluster nodes and jobs into consideration, and increases the execution concurrency of the cluster by reasonably and effectively allocating the node resources, thus increasing the execution efficiency of the multiple jobs of the Hadoop cluster.
Owner:HUAZHONG UNIV OF SCI & TECH

Computer simulation system of public security emergency management and simulation method

The present invention relates to a computer simulation system of public security emergency management and a simulation method. A public security emergency management cloud platform is upwards connected with an emergency command platform, is downwards connected with the town and street emergency command systems, is transversely connected with the municipal special emergency command platforms on the basis of integrating the data resources and the communication network resources of the conventional various systems, thereby realizing the monitoring, the prediction, the early warning, the auxiliary decision-making and the command and dispatch, and providing the comprehensive information services for the emergency rescue and command, the accident deduction, the emergency disposal training and the emergency hedge skill training. The public security emergency management cloud platform comprises an emergency command hall, a basic supporting system, a comprehensive information service system and a mobile emergency platform, enables the generation of the security incidents, the natural disasters and the man-made disasters and the loss brought by the security accidents to be reduced, protects the economy, and maintains the sustained steady and coordinated development of the society. By establishing the security risk evaluation and early warning, the simulation system and the simulation method have the very important significance for improving the social public security emergency rescue of our country, the risk evaluation and the comprehensive management.
Owner:JIANGSU YUANWANG SHENZHOU SOFTWARE CO LTD

Urban road obstacle recognition system

The invention discloses an urban road traffic obstacle tracking and detecting method in which image preprocessing, foreground image extraction, road area detection, multi-target tracking, initial obstacle detection, road traffic safety threat analysis and other parts are related. According to the image preprocessing part, the reliability of image subsequent processing is improved by reducing noise in images and enhancing image contrasts; the foreground image extraction part is used for target detection; the road area detection part is used for judging the positions where obstacles are located, and obtaining road areas by using an eight-neighborhood seed gray filling algorithm; the multi-target tracking is carried out by combining a mean value offset algorithm and a nearest neighbor searching algorithm; the obstacles are judged by detecting the changes of the positions of targets; whether threats to traffic safety are caused by the obstacles or not and whether alarm is carried out or not are judged by analyzing upstream vehicle states. According to the urban road traffic obstacle tracking and detecting method, traffic accidents can be prevented from happening by automatically detecting the urban road traffic obstacles through fixed image sensors.
Owner:UNIV OF SCI & TECH BEIJING

Charge and passenger flow information acquisition method for bus IC (integrated circuit) cards

The invention discloses a charge and passenger flow information acquisition method for bus IC (integrated circuit) cards and belongs to the technical field of transportation. After segmental decreasing rate and the effective time duration of accumulative distance are continuously accumulated by a vehicular terminal according to riding distance, charging by distance is completed by swinging at the moment of boarding and alighting, and data related to boarding and alighting of passengers are uploaded to an information center. Data such as boarding flow, alighting flow, OD (origin and destination) flow and interchange flow on specified time scale are acquired first in real time from the information center terminal according to a specific line, a specific area and an additionally designated traffic zone; the data such as the ratio of passengers ranging from average riding distance to different riding distances and the ratio of passengers ranging from average riding time and different riding times on specified time scale are obtained then in non-real time. Real-time acquisition of bus passenger flow information and continuous acquisition of bus riding feature information are achieved by the method while fairness in public resources consumption is improved effectively, and information base for the fair charge and the related decisions for buses are provided.
Owner:王铎源

City expressway short-time traffic information predicting system and method

The invention relates to a city expressway short-time traffic information predicting system and a method, which belong to the field of traffic information prediction. The system consists of a traffic information fusion sub system, a traffic information mathematical model predicting sub system and a traffic information communication and delivery sub system, wherein the traffic information fusion sub system uses the historical statistical traffic information and the real-time detection traffic information, carries out pretreatment and data fusion, and finally stores results into a collection database to be used by the predicting sub system. The traffic information mathematical model predicting sub system is based on the theory of the phase space reconstruction, adopts a chaotic time sequence self-adapting predicting method based on the time sequence reconstruction, and carries out analysis and prediction on the short-time traffic information within 15 minutes on the city expressway. The predicted traffic information is delivered in real time through the traffic information communication and delivery sub system. The invention provides the reference for the traffic management department to optimize the traffic management schemes and prevent the traffic accidents, the traffic resources are optimized, and the social benefits and the economic benefits are improved.
Owner:UNIV OF SCI & TECH BEIJING

Preparation method of performing body with extendable cross section dimension

The invention relates to a preparation method of a performing body with extendable cross section dimension. According to the method, a three-dimensional multidirectional structure is adopted, and the performing body with the extendable cross section dimension is prepared through fiber beam throwing-out and planting, so the problem that the dimension of the vertical center line is limited by the equipment volume in the existing three-dimensional weaving performing body preparation method is solved. The preparation method has the advantages that on the premise of not increasing the weaving equipment volume, the dimension of the direction vertical to the weaving axis is approximately and exponentially widened, the application of a three-dimensional weaving structure to a large-dimension component becomes possible, yarns in the prepared integrally connected performing body are complete and continuous, the mechanical property of the yarns is favorably and fully exerted, and the yarns can be applied to structural compound materials with higher mechanical property requirements. The reparation method can be used for preparing the performing body with the extendable cross section dimension, and the application of the three-dimensional weaving performing body onto the larger-area structure component is widened.
Owner:NANJING FIBERGLASS RES & DESIGN INST CO LTD

Supercritical dewatering and drying method for small water-saturated bamboo and wood articles

The invention relates to a supercritical dewatering and drying method for small water-saturated bamboo and wood articles, belonging to the technical field of dewatering protection for cultural relics. The small water-saturated bamboo and wood articles of which the length, the width and the height are respectively at most 20cm are respectively soaked for certain time in three kinds of ethanol with different concentrations, then the supercritical drying method is adopted, and therefore the water of the water-saturated bamboo and wood articles is gradually replaced to achieve the purpose of dewatering. Compared with the prior art, the supercritical dewatering and drying method has the advantages that the purpose of dewatering of the water-saturated bamboo and wood articles can be achieved without filling chemical materials; the dewatered bamboo and wood articles have clear wood grains, and the color tends to be normal; the dewatered bamboo and wood articles have good stability under the condition of temperature and humidity fluctuation, and each shrinking percentage is within 5 percent; the complete shape of the cultural relics can be completely ensured, and the method conforms to the basic principle, namely the minimal intervention to protection of the cultural relics; the method has high research and extension values and significance.
Owner:荆州文物保护中心

Pearl natural active peptide having whitening efficacy, and extraction method and application thereof

ActiveCN103333222AImprove researchRaise the technical level of developmentCosmetic preparationsToilet preparationsUltrafiltrationWhitening Agents
The invention belongs to the technical field of biomedical materials, and discloses a pearl natural active peptide having a whitening efficacy, a method for extracting the pearl natural active peptide from nacre, and an application of the pearl natural active peptide. The pearl natural active peptide is obtained by extracting nanometer pearl powder as a raw material through heating water extraction and ultrasonic concussion conditions based on the full exposure of the effective active components of the nanometer pearl powder, and separating and purifying through technologies comprising ultrafiltration for removing macromolecular substances, membrane separation for removing salts, gel chromatographic purification and the like, and the relative molecular mass of the pearl natural active peptide is accurately detected through high performance liquid chromatography. The pearl natural active peptide has the characteristics of basically zero addition of any reagents in the whole extraction and purification processes, guarantee of the natural activities, and good safety, and can be widely used in the fields of cosmetics and medicines for inhibiting the synthesis of melanin in cells as a whitening agent.
Owner:浙江长生鸟健康科技股份有限公司

Road traffic predication system and method based on OD (Origin Destination) updating

The invention discloses a road traffic predication system based on OD (Origin Destination) updating. The predication system is composed of five subsystems, namely a data management subsystem, an image management subsystem, an OD updating subsystem, a requirement predication subsystem and a road traffic predication subsystem, wherein the data management subsystem, the image management subsystem and the OD updating subsystem are used for maintaining and analyzing road traffic basic data, and the requirement predication subsystem and the road traffic predication subsystem face to actual decision making and application of road planning implementation management. The invention further discloses a road traffic predication method based on OD updating, and the method comprises the following steps of: on the basis of the last time of road OD investigation, obtaining an OD matrix of the current year road according to an OD updating method; and taking the OD matrix as a basis to realize the traffic predication of a regional road network, so as to analyze the traffic operation condition of the road network. According to the road traffic predication system and method disclosed by the invention, the problem that the common road OD matrix in a road network plan cannot be synchronized with the planning year is solved and decision-making evidences are supplied to road new construction and a reconstruction project for a road supervising and decision-making department, so as to improve the decision-making rapidness, scientific property and rationality of a road network project.
Owner:SOUTHEAST UNIV

Method for preparing spherical organic micro-molecular monomer or compound through emulsion technology

The invention discloses a method for preparing a spherical organic micro-molecular monomer or compound through an emulsion technology. The method comprises the following steps: adding one or more organic micro-molecules to a solvent-nonsolvent, stirring the one or more organic micro-molecules and the solvent-nonsolvent, adding a surfactant, carrying out ultrasonic or mechanical emulsion after the above obtained emulsion is uniformly dispersed, precipitating crystals through adopting a crystal precipitation technology to obtain a solid and liquid mixture, filtering the mixture, washing the obtained solid, and drying the washed solid to obtain monomer or compound spherical crystals. Compounding, super refinement and spheroidization of the organic micro-molecules are combined in the invention, so the sensitivity of an energetic material is greatly reduced, the fluidity and the loading density of the energetic material are improved, and the viscosity of the crystals in the 3D printing or PBX explosive slurry of the energetic material is reduced; the change of the melting point and the solubility of a medicine improves the stability and the bioavailability of the medicine and facilitates pressing into tablets; and the crystals allow the researching and application fields of conductive organic crystals, nonlinear optical crystals, dyes, photograph raw material pigments and agrochemicals to be expanded.
Owner:SOUTHWEAT UNIV OF SCI & TECH

Three-dimensional Massive MIMO channel modelling method based on random scattering cluster

ActiveCN108365903AImprove researchDescription of non-stationary characteristicsTransmission monitoringRadio transmissionResearch ObjectComputation complexity
The invention discloses a three-dimensional Massive MIMO channel modelling method based on a random scattering cluster, and belongs to the technical field of the wireless communication. Second-order approximation of spherical wave-front is imported into a 3D Massive MIMO channel model due to the computing complexity of the spherical wave-front, namely, parabolic wave-front modelling near field effect, the theoretical and computing complexity are reduced in comparison with the spherical wave-front; a scattering cluster distribution situation in the 3D space is used as a research object for thenon-stable feature presented by the Massive MIMO channel, and a relatively simple modelling method based on scattering cluster space location information is provided by importing two physical conceptions of effective probability of the scattering cluster and the effective scattering cluster, and the propagation feature of the 3D scattering environment is simply and flexibly described by modeling the appearance and disappearance of the effective scattering cluster in an array axis by using the random process. Compared with the operation of directly applying the spherical wave-front, the theoretical and computing complexity are reduced, and a method with low computing complexity is provided for modelling channel near field effect.
Owner:HARBIN ENG UNIV

Calculation method of high-speed railway wireless channel Doppler power spectrum based on scattering characteristic

InactiveCN105610523ADetailed and Accurate CharacterizationImprove researchPropogation channels monitoringChannel parameterVIT signals
The invention provides a calculation method of a high-speed railway wireless channel Doppler power spectrum based on a scattering characteristic. The method comprises the following steps: partitioning a wireless channel in a high-speed railway scattering scene into a very-weak scattering field, a weak scattering field, a strong scattering field and a very-strong scattering field according to weights of scattering components included in a received signal; determining a number of lines of sight and a number of not lines of sight in the received signal; and calculating the Doppler power spectrum of a high-speed railway mobile end according to different scenes. Through adoption of the method, a number of distinguishable lines of sight and a number of distinguishable not lines of sight in the received signal at a certain moment can be described accurately during running of a high-speed railway in different scattering scenes; high-speed railway wireless channel characteristics are represented accurately in more detail through classification and quantization of the scattering scenes; research of a high-speed railway statistics channel model in a three-dimensional space is extended; the accuracy of a channel parameter simulation experiment is increased; and an effective solution is provided for ultrahigh-speed wireless access and high-speed railway networking of a future fifth-generation (5G) mobile communication system.
Owner:SHANGHAI UNIV

Abdominal organ dynamic contrast enhanced magnetic resonance imaging method based on compressed sensing

The invention relates to an abdominal organ dynamic contrast enhanced magnetic resonance imaging method based on compressed sensing. The method concretely includes the steps: 1), a magnetic resonance imaging pulse sequence includes a three dimensional gradient echo excitation pulse, a space coding gradient and a signal relaxation sequence, the three of which are explained respectively as follows: 1.1) setting parameters of a radio frequency excitation pulse of a three dimensional gradient echo sequence; 1.2) optimizing a choose-layer phase coding kz and an inner-layer phase coding ky respectively, that is to say, carrying out sub-sampling according to a CS theory, the frequency coding direction kx being fully sampling; and 1.3) applying spoiled gradient to an x gradient direction, a y gradient direction and a z gradient direction in terms of the signal relaxation sequence; 2) a magnetic resonance imaging system carries out compressed sampling of k-space data of all phases of DCE-MRI scanning for an abdominal organ on the basis of a CS optimized magnetic resonance imaging pulse sequence, and obtains original sampling data of a time sequence; and 3) CS reconstruction of the original sampling data is conducted, that is to say, a DICOM image of the abdominal organ is reconstructed and obtained on the basis of a non-linear algorithm with a minimized 1<1> normal form. The method can be widely applied to abdominal organ dynamic contrast enhanced magnetic resonance imaging.
Owner:PEKING UNIV
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