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Search Results: 1 - 10 of 67604 matches for " Hu Xu "
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A Review of White Space Research  [PDF]
Chuming Hu, Feifei Xu
Open Journal of Social Sciences (JSS) , 2019, DOI: 10.4236/jss.2019.73027
Abstract: The white space in life is everywhere. White space refers to the blank, pages, charms, etc., which are empty, unfilled or undeveloped projects and fields. In this paper, the concept, function, related research of white space are described and discussed, and the research direction and relevant marketing suggestions are put forward, in order to provide useful inspiration for further research in this field.
Live Line Measuring the Parameters of 220 kV Transmission Lines with Mutual Inductance in Hainan Power Grid  [PDF]
Zhongzhu Xu, Zhijian Hu, Chuanqi Li
Engineering (ENG) , 2013, DOI: 10.4236/eng.2013.51B027
Abstract: A live line measurement method for the zero sequence parameters of transmission lines with mutual inductance is introduced. The mathematical models of the measurement method are given. Global Positioning System (GPS) is used as the synchronous signal for the measurement carried out at different substations simultaneously. The measurement system and digital simulation results are given. Finally, the live line measurement results of two 220 kV transmission lines with mutual inductance in Hainangrid are given. Results from both simulation and on-site measurement show that the live line measurement method is feasible, and its measurement accuracy can satisfactorily meet the requirements of engineering measurement.


Design and Implementation of Secure Nodes in the Based-Internet-of-Things Intelligent Household  [PDF]
Xiangdong Hu, Hongru Xu, Kaimin Han
Journal of Computer and Communications (JCC) , 2014, DOI: 10.4236/jcc.2014.27001

As one of the most important uses of the Internet of things (IOT), the intelligent household is becoming more and more popular. There are many fragile nodes in the intelligent household and they are bound to encounter some potential risks of hostile attacks, such as eavesdropping, denial of service, error instructs, non-authorized access or fabrication and others. This paper presents a method of design and implement of secure nodes for the intelligent household based on the IOT technology, besides giving the hardware model of nodes, the management of key, the access authentication of network, the transmission of encrypted data, and the alarm based on intrusion detection and other security mechanisms. That is, to improve the security of the based-IOT intelligent household from the viewpoint of nodes security. A test platform is built and the results of simulation prove that the proposed method can effectively improve the security of the intelligent household from access safety and transmission security.

A Way to Set up Security Layer over Internet  [PDF]
Xiangyi Hu, Guifen Zhao, Guanning Xu
Journal of Computer and Communications (JCC) , 2015, DOI: 10.4236/jcc.2015.35022

A security architecture using secret key algorithm and vertical authentication mode is proposed. Establish security protocols in the chip of smart key at network client or mobile phone, and establish key exchange protocol in the chip of encryption cards at network key management center. A combined key real-time generation algorithm is used to solve the update and management problems. Online or offline authentication and documents encryption transmission protocols are adopted to achieve credible connection between users. Accordingly, set up security layer over Internet, which provides convenient encryption ability to each network user, and build credible and secure network system.

Equivalence of Uniqueness in Law and Joint Uniqueness in Law for SDEs Driven by Poisson Processes  [PDF]
Huiyan Zhao, Chunhua Hu, Siyan Xu
Applied Mathematics (AM) , 2016, DOI: 10.4236/am.2016.78070
Abstract: We give an extension result of Watanabe’s characterization for 2-dimensional Poisson processes. By using this result, the equivalence of uniqueness in law and joint uniqueness in law is proved for one-dimensional stochastic differential equations driven by Poisson processes. After that, we give a simplified Engelbert theorem for the stochastic differential equations of this type.
Humanoid Based Intelligence Control Strategy of Plastic Cement Die Press Work-Piece Forming Process for Polymer Plastics  [PDF]
Dekuan Liu, Shuang Jin, Hu Xu
Journal of Materials Science and Chemical Engineering (MSCE) , 2016, DOI: 10.4236/msce.2016.46002
The plastic cement belongs to a sort of polymer material, the chemical composition is very complex, and the plastic cement work-piece is generally manufactured by die press forming. Aimed at being difficult to control in parameters of forming process, the paper explored the humanoid based intelligence control strategy. In the paper, it made the anatomy in control puzzle resulted in uncertainty such as chemical component of plastic cement etc., summarized up the characteristic of cybernetics in forming process, researched on the humanoid based intelligence control strategy, and constructed the control algorithm of forming process in plastic cement work-piece. Taking the process experiment of temperature and pressure control as an example, it validated the good dynamic and static control quality through simulation of control algorithm constructed in this paper. The experimental results show that the control algorithm explored in this paper is reasonably available.
Mapping Quantitative Trait Loci Using Distorted Markers
Shizhong Xu,Zhiqiu Hu
International Journal of Plant Genomics , 2009, DOI: 10.1155/2009/410825
Abstract: Quantitative trait locus (QTL) mapping is usually performed using markers that follow a Mendelian segregation ratio. We developed a new method of QTL mapping that can use markers with segregation distortion (non-Mendelian markers). An EM (expectation-maximization) algorithm is used to estimate QTL and SDL (segregation distortion loci) parameters. The joint analysis of QTL and SDL is particularly useful for selective genotyping. Application of the joint analysis is demonstrated using a real life data from a wheat QTL mapping experiment.
PROC QTL—A SAS Procedure for Mapping Quantitative Trait Loci
Zhiqiu Hu,Shizhong Xu
International Journal of Plant Genomics , 2009, DOI: 10.1155/2009/141234
Abstract: Statistical analysis system (SAS) is the most comprehensive statistical analysis software package in the world. It offers data analysis for almost all experiments under various statistical models. Each analysis is performed using a particular subroutine, called a procedure (PROC). For example, PROC ANOVA performs analysis of variances. PROC QTL is a user-defined SAS procedure for mapping quantitative trait loci (QTL). It allows users to perform QTL mapping for continuous and discrete traits within the SAS platform. Users of PROC QTL are able to take advantage of all existing features offered by the general SAS software, for example, data management and graphical treatment. The current version of PROC QTL can perform QTL mapping for all line crossing experiments using maximum likelihood (ML), least square (LS), iteratively reweighted least square (IRLS), Fisher scoring (FISHER), Bayesian (BAYES), and empirical Bayes (EBAYES) methods.
An Advanced Compiler Designed for a VLIW DSP for Sensors-Based Systems
Xu Yang,Hu He
Sensors , 2012, DOI: 10.3390/s120404466
Abstract: The VLIW architecture can be exploited to greatly enhance instruction level parallelism, thus it can provide computation power and energy efficiency advantages, which satisfies the requirements of future sensor-based systems. However, as VLIW codes are mainly compiled statically, the performance of a VLIW processor is dominated by the behavior of its compiler. In this paper, we present an advanced compiler designed for a VLIW DSP named Magnolia, which will be used in sensor-based systems. This compiler is based on the Open64 compiler. We have implemented several advanced optimization techniques in the compiler, and fulfilled the O3 level optimization. Benchmarks from the DSPstone test suite are used to verify the compiler. Results show that the code generated by our compiler can make the performance of Magnolia match that of the current state-of-the-art DSP processors.
The evolution of molecular wave packet in superstrong laser fields
Suxing Hu,Zhizhan Xu
Chinese Science Bulletin , 1997, DOI: 10.1007/BF02882516
Abstract: In this note wc numerically simulate the wave packet evolution of H2 + in superstrong laser fields with the multiple electronic-states model. The result is that the evolution process of H2 + wave packet is mainly determined by the laser frequency. For the high-frequency fields H2 + wave packet extends out of the interaction region step by step. However, the H2 + wave packet is quickly dissociated in low-frequency fields. In addition, the molecular stabilization effect can be characterized at the intensity of 8 × 1015 W/cm2 for the low-frequency field ω1.
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