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Search Results: 1 - 10 of 9693 matches for " Baoshan Zeng "
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The Spatial Distribution Pattern Analysis of City Infrastructure Cases of Urban Management  [PDF]
Jiwei Hou, Jianhua Liu, Siyu Li, Shiran Song, Congcong Li, Yueming Duan, Baoshan Zeng
Journal of Geoscience and Environment Protection (GEP) , 2018, DOI: 10.4236/gep.2018.612002
Abstract: The effective disposal of daily city infrastructure cases is an important issue for urban management. To more effectively utilize a large amount of historical cases data collected and accumulated in the urban grid management system, and to analyze their spatial distribution pattern information for city managers, this study used the comparative kernel density analysis method in two types of cases (i.e. power facilities and traffic guardrail) in Xicheng District, Beijing for the year 2016 and 2017. This research analyzes them at different scales (300 m, 600 m, 1,200 m), and the experiment results show that the method of comparative kernel density analysis is able to provide an intuitively spatial visualization distribution analysis of city infrastructure related cases. The quantitative information of spatial agglomeration degree is helpful for city managers making decision.
Consensus of a Kind of Dynamical Agents in Network with Time Delays  [PDF]
Hongwang Yu, Baoshan Zhang
Int'l J. of Communications, Network and System Sciences (IJCNS) , 2010, DOI: 10.4236/ijcns.2011.311121
Abstract: This paper investigates the collective behavior of a class of dynamic agents with time delay in transmission networks. It is assumed that the agents are Lyapunov stable distributed on a plane and their location coordinates are measured by some remote sensors with certain error and transmitted to their neighbors. The control protocol is designed on the transmitted information by a linear decentralized law. The coordination of dynamical agents is shown under the condition that the error is small enough. Numerical simulations demonstrate that our theoretical results are effective.
The implementation of the educational achievement study of the science curriculum
YANG Baoshan
Asia-Pacific Forum on Science Learning and Teaching , 2008,
Abstract: IEA (International Association of the Evaluation of Educational Achievement) and OECD (Organisation for Economic Co-operation and Development) are two large-scale worldwide assessment projects that conduct international surveys on students’ educational achievement. Looking into the approach of the surveys, IEA focuses on students’ educational achievement based on the educational systems while OECD leans on the students’ capacity in continuous learning throughout their adulthood. In terms of the contents of the surveys, both of them included internationally recognised core subjects such as Reading, Mathematics, and Science. Most of the participating countries would review the impact of their own teaching and learning curricula, educational systems, culture in the society, and family background on the students’ educational achievement according to the worldwide ranking. Furthermore, NAEP from the United States, APU from the United Kingdom, as well as the national research from Japan also generate different levels of effects. As a result, there is a significant meaning for the implementation of the surveys when we explore the educational achievement of the Science curriculum in three aspects –– the basic framework of the survey, the core contents, and the major methods.There were numerous discussions and practices on the issues of assessment framework for scientific literacy in the Mainland China. Scientific literacy has been treated as the major objective in the teaching and learning of science subjects, especially after the implementation of the new curriculum. It highlights the exploration of scientific literacy, which is based on the three dimensions of the scientific assessment framework –– knowledge and skills, processes and methods, emotions, attitudes and values, in the assessment of educational achievement in the science subjects.Upon the implementation of the new curriculum, the integrated investigation of the three dimensions has become more outstanding in the assessment of educational achievement of science subjects. In terms of the research on scientific knowledge, the close relationship between students’ learning and their practical lives, the research on students’ understanding of scientific knowledge and their abilities to apply knowledge to explain phenomena, to analyse, and to solve problems were emphasized. In terms of the research on scientific exploration, there are concerns about students’ abilities to explore practical problems. In term of the research on emotions, attitudes, and values, emotion education is permeated into specific an
60 years of science curriculum reform in China
Baoshan YANG
Asia-Pacific Forum on Science Learning and Teaching , 2009,
Abstract: In Mainland China, the science curriculum has gone 60 years of development. This paper illustrates how to objectively evaluate the reform and development over the last half century as using the characteristics of nature of curriculum reform to examine the science curriculum reform. This will render not only a historical significance but a practical implication.
Matrix Online Characteristic Number and Its applications in Goldbach Conjecture,Polignac Conjecture,the Twin Prime Conjecture
Baoshan Zhang
Mathematics , 2013,
Abstract: This article consists of three chapters.In Chapter 1, it is determined by the consecutive odd numbers, and study to the intrinsic properties of a class of matrix sequence. Through the establishment of matrix online number concept, characteristics and the online number column use mathematical induction to prove the some properties of this kind of matrix on the number of online features (Theorem 1). Finally, it is given a trial to prove the Goldbach conjecture (Theorem 6). This is the author in the years to explore prime properties in the process of research and discovery, and believe that this finding is of great significance.In Chapter 2, it is defined the concepts of matrix master characteristic number and the Matrix Master Characteristic Sequence (Definition 1). Firstly, we prove that any even number can be expressed as for the difference of two odd prime numbers at least two groups (Theorem 4). Secondly, we prove that there are infinitely many odd prime numbers separated by four (Theorem 9). Finally, we prove that if there is greater than 1 in the intersection by S(3) and s(2m+3) for any natural number m, so that there are infinitely many odd prime numbers separated by 2m(Theorem11). The results will undoubtedly promote the research for Polignac conjecture.In Chapter 3, mainly as a result of any odd natural number a, the intersection by S(a) and s(a+2) is not empty number set, and there are far more than 1 number in the set, where S(a)={k,If 2k+a be prime as k be natural number},and P is a prime number set, N is natural number set. we prove that there are an infinite number of twin prime, and then solve the problem of the twin primes in number theory.
Researches on the Twin Prime Problem
Zhang Baoshan
Mathematics , 2014,
Abstract: Twin prime number problem is mainly the structure of the twin prime numbers and whether there are infinitely many prime twins group. In this paper, by constructing a special cluster number set(see formula(2.3)in the paper), proves that the number of set number of the first n columns set the intersection of the minimum number of q is decision of the prime twins (q, q+2), and the minimum number of series is divergent(see Theorem 2).The main rezults are Theorem 2,Theorem 3 and Theorem 4.Prime twins so thoroughly proved there must be infinitely many groups of twin prime conjecture.
Coordination for Networks of Dynamic Agents with Time-Varying Delays  [PDF]
Hongwang Yu, Baoshan Zhang, Yufan Zheng
Wireless Sensor Network (WSN) , 2010, DOI: 10.4236/wsn.2010.22019
Abstract: This paper is devoted to the study of the coordinate stability in undirected networks of dynamical agents with time-varying transmission delay. Neighbor-based rules are adopted to realize local control strategies for these continuous-time autonomous agents. Sufficient and necessary conditions in terms of linear matrix inequalities (LMIs) are given to guarantee the coordination of dynamical agents. Numerical simulations are given and demonstrate that our theoretical results are effective.
Rolling Bearing Diagnosis Based on LMD and Neural Network
Baoshan Huang,Baoshan Huang,Wei,Wei Xu
International Journal of Computer Science Issues , 2013,
Abstract: Inner ring pitting, the outer indentation and rolling element wear are typical faults of rolling bearing. In order to diagnose these faults rapidly and accurately, the paper proposes a novel diagnosis method of rolling bearing based on the energy characteristics of PF component and neural network by the vibration signal of local mean decomposition(Local mean decomposition, LMD). The vibration signal is decomposed into several PF components by the local mean decomposition, the calculated energy characteristics of the PF component are inputted to the neural network to identify the type of rolling bearing faults. At the same time, the genetic algorithm is introduced to optimize the structure parameters of neural network, which improves diagnostic rate and accuracy of faults. The results show that this method has a higher diagnosis and recognition rate for the typical faults of rolling bearing.
EXPERIMENTAL AND THEORETICAL INVESTIGATIONS ON THE ELECTROCHEMICAL POLYMERIZATION OF ORTHO-DISUBSTITUTED BENZENE
邻二取代苯电化学氧化聚合的实验及理论计算研究

ZENG Liqiang,LI Yuzhen,XU Jingkun,LE Zhanggao,WANG Baoshan,MA Mulin,
曾理强
,李玉真,徐景坤,乐长高,王宝山,马木林

高分子学报 , 2009,
Abstract: The electrochemical polymerizations of a series of ortho-disubstituted benzenes were investigated by experimental and theoretical approaches.The results indicated that o-dihydroxybenzene((oHDB),)o-dimethoxybenzene (oDMOB) and 1-hydroxy-2-methoxybenzene(HMOB) in pure boron trifluoride diethyl etherate(BFEE) can be succefully electropolymerized.The~1H,~(13)C-NMR spectra of these monomers and their corresponding polymers proved that the polymerization occurred mainly at C_4 and C_5 positions.However the others...
Aligning DNA on Si surface and cutting off by tips of atomic force microscope
Hui Li,Baoshan Han
Chinese Science Bulletin , 2003, DOI: 10.1007/BF03187056
Abstract: DNA is a kind of promising molecule as nano-lead to build or connect nano-devices due to its stable linear structure and certain conductivity. Many methods have been applied to constructing nano-patterns by using DNA molecule. In this report it is presented that λ-DNA was aligned on Si substrate by using the free-flowing method and then imaged by an atomic force microscope (AFM). After the second liquid flow, a catenary-like pattern and a crossed network of λ-DNA were formed. In addition, the aligned λ-DNA was successfully cut off by tips of AFM.
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