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Search Results: 1 - 10 of 78261 matches for " Chen Tongbao "
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Considerations on the Development of China s Electronic Information Resources

Chen Tongbao,

现代图书情报技术 , 1997,
Abstract: On the basis of the nation wide database survey,status and issues of the databases in China have been statistically analyzed in this paper.A comparison with the development of databases outside China has been made in order to clarify the current level of database industry and the gap to be filled.To tackle the problems confronting us,some suggestions on the further development of electronic information resources have been made.

Chen Tongbao,

现代图书情报技术 , 1992,
Abstract: In this article, the state-of-the-art of oversea data communication and China s data communication network are summarized. Also the structure and mode of China s national information service network are analysed and elaborated.
On Building VSAT Backbone Network of SSTCC

Chen Tongbao Fu Qiang,

现代图书情报技术 , 1997,
Abstract: The National Scientific and Technical lnformation Network (STINet) has reached a certain size after two year development, But the developing speed is reduced due to the over-high telecommunication cost. So the State Science and Technology Committee of China (SSTCC) has decided to set up the VSAT backbone network which will provide STINet with a communication platform to reduce the telecommunication cost and provide a unified transferring platform for other systems and networks of SSTCC. The article introduces and analyses the current situation of STINet, the possibility and the structur of the above project, the VAST network of SSTCC.
Effects of Ca2+ on nitrogen metabolism in wheat seedlings exposed to salt stress

Wang ZhiQiang,and Lin TongBao,

生态学报 , 2009,
Abstract: To seek ways for improving salt\|tolerance of wheat plants, experiments were conducted to examine the ameliorative effects of Ca2+ on nitrogen metabolism under salt stress using an ordinary wheat cultivar (Triticum aestivum L. cv. Yumai 34) as the material. The wheat seedlings were cultured in full nutrient solution. The first leaf being fully expanded, different treatments were initiated by culturing the plants in the nutrient solution without calcium. NaCl (150 mmol?L-1 and 300 mmol?L-1) and combinations of NaCl + Ca2+ (150 mmol?L-1 + 4 mmol?L-1 and 300 mmol?L-1 + 4 mmol?L-1) were applied to the growing plants using no salt\|stressed plants as control. After 5 days of treatments, the activities of nitrogen assimilation enzymes, the amount of nitrogen assimilation and the growth status of wheat seedlings were determined. The results showed that Ca2+ significantly alleviated the depressed\|growth of wheat seedlings under low salt stress, manifesting the enhanced fresh weight, chlorophyll and soluble protein contents; while Ca2+ did not show obvious ameliorative effects under high salt stress. Ca2+ promoted the nitrogen assimilation and improved the status of nitrogen nutrition in wheat plants exposed to low salt stress, which could be mainly due to the enhanced activities of nitrate reductase (NR), glutamine synthetase (GS) and NADP\|dependent isocitrate dehydrogenase (NADP\|ICDH). The minor ameliorative effects of Ca2+ on nitrogen assimilation in wheat seedlings under high salt stress could be explained by the insignificant increase of NADP\|ICDH activity.
Research on the Incentive Mechanism of Hidilao Hotpot’s Employees Based on Grounded Theory  [PDF]
Chen Chen
Journal of Human Resource and Sustainability Studies (JHRSS) , 2018, DOI: 10.4236/jhrss.2018.61031
Abstract: The traditional classical incentive model only reveals the general rule of organizational incentive, and does not give specific operation rules. The matching between organizational incentives and employee needs is still black box, and it does not reveal its core operation mechanism from the perspective of mechanism. This paper took through the literature review, the Hidilao Hotpot company as a case study, through a variety of ways to collect data, the use of grounded theory to encode data analysis, and ultimately extracted 58 concepts, 26 sub-areas, 7 main areas, concluded that the Hidilao Hotpot Employee motivation formed the path, and ultimately extracted the micro-level employee motivation mechanism model. The research result of this article comes from the practice of the enterprise, which has enlightenment to the organizational incentive of the traditional catering industry and also provides a micro-research perspective and systematic mechanism research for the incentive field.
Digital Image Watermarking Based on Mixed Error Correcting Code  [PDF]
Yonghong Chen, Jiancong Chen
Journal of Information Security (JIS) , 2012, DOI: 10.4236/jis.2012.32018
Abstract: In this paper, we present a novel technique based on a mixed Error Correcting Code(ECC)-the convolutional code and the repetition code to enhance the robustness of the embedded watermark. Before embedding, the binary watermark is scanned to one-dimension sequence and later inputted into the (3, 1, 2) convolutional encoder and (3, 1) repetition encoder frame by frame, which will improve the error correcting capability of decoder. The output code sequence is scanned to some matrixes as the new watermark messages. The watermarking is selected in low frequency band of the Discrete Wavelet Transform (DWT) and therefore it can resist the destruction of image processing. Experimental results are presented to demonstrate that the robustness of a watermark with mixed ECC is much higher than the traditional one just with repetition coding while suffering JPEG lossy compression, salt and pepper noise and center cutting processing.
Operator Equation and Application of Variation Iterative Method  [PDF]
Ning Chen, Jiqian Chen
Applied Mathematics (AM) , 2012, DOI: 10.4236/am.2012.38127
Abstract: In this paper, we study some semi-closed 1-set-contractive operators A and investigate the boundary conditions under which the topological degrees of 1-set contractive fields, deg (I-A, Ω, p) are equal to 1. Correspondingly, we can obtain some new fixed point theorems for 1-set-contractive operators which extend and improve many famous theorems such as the Leray-Schauder theorem, and operator equation, etc. Lemma 2.1 generalizes the famous theorem. The calculation of topological degrees and index are important things, which combine the existence of solution of for integration and differential equation and or approximation by iteration technique. So, we apply the effective modification of He’s variation iteration method to solve some nonlinear and linear equations are proceed to examine some a class of integral-differential equations, to illustrate the effectiveness and convenience of this method.
Blow-Up and Attractor of Solution for Problems of Nonlinear Schrodinger Equations  [PDF]
Ning Chen, Jiqian Chen
Applied Mathematics (AM) , 2012, DOI: 10.4236/am.2012.312263
Abstract: In this paper, the authors study the blow-up of solution for a class of nonlinear Schrodinger equation for some initial boundary problem. On the other hand, the authors give out some analyses and that new conclusion by Eigen-function method. In last section, the authors check the nonlinear parameter for light rule power by using of parameter method to get ground state and excite state correspond case, and discuss the global attractor of some fraction order case, and combine numerical test. To illustrate this physics meaning in dimension d = 1, 2 case. So, by numerable solution to give out these wave expression.
Some Approximation in Cone Metric Space and Variational Iterative Method  [PDF]
Ning Chen, Jiqian Chen
Applied Mathematics (AM) , 2012, DOI: 10.4236/am.2012.312276
Abstract: In this paper, we give some new results of common fixed point theorems and coincidence point case for some iterative method. By using of variation iteration method and an effective modification of He’s variation iteration method discusses some integral and differential equations, we give out some new conclusion and more new examples.
Photoconductive Effect of Liquid and Utilization of Solar Energy  [PDF]
Ziwei Chen, Shihao Chen
Open Journal of Physical Chemistry (OJPC) , 2014, DOI: 10.4236/ojpc.2014.41003

Experiments described in this paper show that there is the photoconductive effect of liquid, i.e. when light shines into a sort of alkali, acid or salt solution, the conductivity of the solution will increase. The mechanism of the effect is explained as follows. When hydrated ions in the solution absorb photons with their high enough energies, they will decompose to naked ions and water-molecules. The naked ions can reach an anode or a cathode more easily and faster than the hydrated ions; It is possible that when a molecule in the solution absorbs a photon with its high enough energy, it will decompose to negative and positive ions. Based on the effect, a device producing hydrogen by the solar-energy had been devised.

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