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Search Results: 1 - 10 of 45575 matches for " Zhu Han "
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Fuzzy Complex Index in Water Quality Assessment of Municipalities  [PDF]
Lei Zhu, Han Hu
Journal of Water Resource and Protection (JWARP) , 2010, DOI: 10.4236/jwarp.2010.29095
Abstract: Donghu Lake in Wuhan is a multipurpose complex water body. However, its eutrophication phenomenon becomes increasingly serious. By making use of detailed and accurate contamination monitoring data and several mathematics models, we probe into the dynamic state of water quality. The year’s average value of major contamination index in Donghu Lake from 2001 to 2008 and fuzzy complex index are used to assess its short-term state of water quality. The results show that its water quality is basically stable in the 4th class of water quality standard GB3838-2002.
Axiomatic Systems for the Bisimilarity on Finite Fair Ambient Processes
Han Zhu
Journal of Computers , 2009, DOI: 10.4304/jcp.4.6.469-476
Abstract: In this paper, we study an axiom system for the bisimilarity on finite Fair Ambient processes. In order to obtain normal forms of finite processes, we extended the syntax of Fair Ambient to put the nested ambient structure into prefixes. Upon our axiom system, if two finite Fair Ambient processes are equivalent can be effectively checked.
The Comprehensive Evaluation Research of Automated Charging Station’s Lightning Protection Design in Airport  [PDF]
Baocheng Wang, Guyong Han, Lin Zhu
Journal of Power and Energy Engineering (JPEE) , 2014, DOI: 10.4236/jpee.2014.24073
Abstract: In order to inspect the good and reliability of automated charging station’s lightning protection design in airport, we set the comprehensive evaluation mathematical model of automated charging station in the airport, through the method of second order fuzzy comprehensive evaluation and evaluate the automated charging station’s lightning protection design comprehensively by using the assessment data of expert database.
Research on Technology of Electromagnetic Protection for the Generator Control System  [PDF]
Baocheng Wang, Guyong Han, Lin Zhu
Journal of Power and Energy Engineering (JPEE) , 2014, DOI: 10.4236/jpee.2014.24002
Abstract:

Generator control system decides whether the generator can work as usual or not, as well as its stability of performance. Both types of generators control system composed of the transistor and DSP are sensitive to outward electromagnetic interference, directly related to the generator performance. In this text, we first analyze the electromagnetic interference threat generator control system of transistor type may face, then design a electromagnetic protection plan for the intake, the panel and the sense organ. This work is of great significance in improving its electromagnetic protection ability and stability of performance.

Modeling for Collapsing Cavitation Bubble near Rough Solid Wall by Mulit-Relaxation-Time Pseudopotential Lattice Boltzmann Model  [PDF]
Minglei Shan, Yipeng Zhu, Cheng Yao, Qingbang Han, Changping Zhu
Journal of Applied Mathematics and Physics (JAMP) , 2017, DOI: 10.4236/jamp.2017.56106
Abstract: Cavitation bubble collapse near rough solid wall is modeled by the multi-relaxation-time (MRT) pseudopotential lattice Boltzmann (LB) model. The modified forcing scheme, which can achieve LB model’s thermodynamic consistency by tuning a parameter related with the particle interaction range, is adopted to achieve desired stability and density ratio. The bubble collapse near rough solid wall was simulated by the improved MRT pseudopotential LB model. The mechanism of bubble collapse is studied by investigating the bubble profiles, pressure field and velocity field evolution. The eroding effects of collapsing bubble are analyzed in details. It is found that the process and the effect of the interaction between bubble collapse and rough solid wall are affected seriously by the geometry of solid boundary. At the same time, it demonstrates that the MRT pseudopotential LB model is a potential tool for the investigation of the interaction mechanism between the collapsing bubble and complex geometry boundary.
The Application of Deep Learning in Airport Visibility Forecast  [PDF]
Lei Zhu, Guodong Zhu, Lei Han, Nan Wang
Atmospheric and Climate Sciences (ACS) , 2017, DOI: 10.4236/acs.2017.73023
Abstract: This paper uses Urumqi International Airport’s hourly observation from 2007 to 2016 and builds regression prediction model for airport visibility with deep learning method. From the results we can see: the absolute error of hourly visibility is 706 m. When the visibility ≤ 1000 m, the absolute error is 325 m, and this method can predict visibility’s trend. So we can use this method to provide the airport visibility’s objective forecast guidance products for aviation meteorological services in the future. In this paper, the Urumqi area is as the research object, to explore the depth of learning in the field of weather forecasting applications, providing a new visibility return forecast for weather forecast personnel so as to improve the visibility of the level of visibility to ensure the safe and stable operation of the airport.
Comparison Theorems for the Multidimensional BDSDEs and Applications
Bo Zhu,Baoyan Han
Journal of Applied Mathematics , 2012, DOI: 10.1155/2012/304781
Abstract: A class of backward doubly stochastic differential equations (BDSDEs) are studied. We obtain a comparison theorem of these multidimensional BDSDEs. As its applications, we derive the existence of solutions for this multidimensional BDSDEs with continuous coefficients. We can also prove that this solution is the minimal solution of the BDSDE.
Analysis on the Main Factors Affecting the Reliability of Test Papers
Jiang Zhu,Lemeng Han
Journal of Language Teaching and Research , 2011, DOI: 10.4304/jltr.2.1.236-238
Abstract: Reliability is an important factor to evaluate test papers. This paper analyzes the factors which affect the reliability of test papers and discusses the methods to increase the reliability of test papers.
The Application of Context Theory in English Teaching of Reading
Jiang Zhu,Lemeng Han
English Language Teaching , 2010, DOI: 10.5539/elt.v3n1p142
Abstract: Context theory is a very important theory in English teaching, especially the teaching of reading. This paper first analyzes the theory of context, including the features of context and some principles in context theory. Then the paper discusses the application of context theory in English teaching of reading, including some problems met in reading comprehension test and some teaching methods related to context theory.
Distributed Cooperative Transmission with Unreliable and Untrustworthy Relay Channels
Han Zhu,Sun YanLindsay
EURASIP Journal on Wireless Communications and Networking , 2009,
Abstract: Cooperative transmission is an emerging wireless communication technique that improves wireless channel capacity through multiuser cooperation in the physical layer. It is expected to have a profound impact on network performance and design. However, cooperative transmission can be vulnerable to selfish behaviors and malicious attacks, especially in its current design. In this paper, we investigate two fundamental questions Does cooperative transmission provide new opportunities to malicious parties to undermine the network performance? Are there new ways to defend wireless networks through physical layer cooperation? Particularly, we study the security vulnerabilities of the traditional cooperative transmission schemes and show the performance degradation resulting from the misbehaviors of relay nodes. Then, we design a trust-assisted cooperative scheme that can detect attacks and has self-healing capability. The proposed scheme performs much better than the traditional schemes when there are malicious/selfish nodes or severe channel estimation errors. Finally, we investigate the advantage of cooperative transmission in terms of defending against jamming attacks. A reduction in link outage probability is achieved.
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