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Search Results: 1 - 10 of 61238 matches for " Hong-tao Shen "
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Preparation and Characterization of Mesoporous Iron-Oxide
XUE Hong-Tao,SHEN Shui-Fa,PAN Hai-Bo,XIE Chang-Huai
无机材料学报 , 2009, DOI: 10.3724/sp.j.1077.2009.00577
Abstract: Transition metal oxides are easy to form insoluble oligomer in reaction because of complicated oxidation states, so it is difficult to obtain the desired mesoporous structure. To resolve the problem, mesoporous iron oxide was synthesized by reacting a micellar phase of sodium dodecyl sulfate (SDS) with iron polymer solution which was prepared by controlling the proportion of sodium hydroxide and ferric chloride. Crystal structure and surface structure of the mesoporous iron oxide was characterized by powder X-ray diffraction (XRD), Fourier transform a2 infrared spectroscopy (FT-IR), thermogravimetric analyse(TGA), Nitrogen adsorptiona2desorption method and so on. The results show that mesoporous | Fe2O3 can be obtained after calcining at 450 ith OH-/Fe3+ ratio of 2.0. Its surface area is 146.5m2 ¤g-1, BJH average diameter is 6.9nm, pore volume is 0.27cm3 ¤g-1. The asa2prepared mesoporous iron oxide has better thermal stability, it still has surface area of 110.2m2 ¤g-1 after calcination at 550
A Simple Method of Calculating Commutators in Hamilton System with Mathematica Software
Hong-Tao Zhang
Physics , 2002,
Abstract: As a powerful tool in scientific computation, Mathematica offers us algebraic computation, but it does not provide functions to directly calculate commutators in quantum mechanics. Different from present software packets to deal with noncommutative algebra, such as NCAlgebra and NCComAlgebra, one simple method of calculating the commutator in quantum mechanics is put forward and is demonstrated by an example calculating SO(4) dynamical symmetry in 3 dimensions Coulomb potential. This method does not need to develop software packets but rather to directly write program in Mathematica. It is based on the connection between commutator in quantum mechanics and Poisson bracket in classical mechanics to perform calculations. Both the length and the running time of this example are very short, which demonstrates that this method is simple and effective in scientific research. Moreover, this method is used to calculate any commutator in Hamilton system in principle. In the end some deficiencies and applications are discussed.
SURFACE OSCILLATIONS OF EVEN-EVEN NUCLEI
偶-偶原子核的表面振盪

SHEN HONG-TAO,LI YANG-GUO,REN GENG-WEI,
沈洪涛
,李扬国,任庚未

物理学报 , 1960,
Abstract: 本文考虑了偶—偶原子核,集体表面振荡的能谱,着重考虑在强耦合理论中β自由度对能谱的影响,发现β自由度除了贡献一部分新的β振荡激发能谱以外,对原有的能谱影响不大。
Leaching of lead from zinc leach residue in acidic calcium chloride aqueous solution
Le Wang,Wen-ning Mu,Hong-tao Shen,Shao-ming Liu,Yu-chun Zhai
- , 2015, DOI: https://doi.org/10.1007/s12613-015-1094-y
Abstract: A process with potentially reduced environmental impacts and occupational hazards of lead-bearing zinc plant residue was studied to achieve a higher recovery of lead via a cost-effective and environmentally friendly process. This paper describes an optimization study on the leaching of lead from zinc leach residue using acidic calcium chloride aqueous solution. Six main process conditions, i.e., the solution pH value, stirring rate, concentration of CaCl2 aqueous solution, liquid-to-solid (L/S) ratio, leaching temperature, and leaching time, were investigated. The microstructure and components of the residue and tailing were characterized using scanning electron microscopy (SEM) and X-ray diffraction (XRD). On the basis of experimental results, the optimum reaction conditions were determined to be a solution pH value of 1, a stirring rate of 500 r·min?1, a CaCl2 aqueous solution concentration of 400 g·L?1, a liquid-to-solid mass ratio of 7:1, a leaching temperature of 80°C, and a leaching time of 45 min. The leaching rate of lead under these conditions reached 93.79%, with an iron dissolution rate of 19.28%. Silica did not take part in the chemical reaction during the leaching process and was accumulated in the residue.
Design and Synthesis of Immunoconjugates and Development of an Indirect ELISA for Rapid Detection of 3, 5-Dinitrosalicyclic Acid Hydrazide
Yu-Dong Shen,Shi-Wei Zhang,Hong-Tao Lei,Hong Wang,Zhi-Li Xiao,Yue-Ming Jiang,Yuan-Ming Sun
Molecules , 2008, DOI: 10.3390/molecules13092238
Abstract: In this study novel immunoconjugates were designed, synthesized and then used to develop a rapid, specific and sensitive indirect ELISA method to directly detect residues of 3,5-dinitrosalicyclic acid hydrazide (DNSH), a toxic metabolite of nifursol present in chicken tissues. The hapten DNSHA was first designed and used to covalently couple to BSA to form an immunogen which was immunized to rabbits to produce a polyclonal antibody against DNSH. Furthermore, a novel 3,5-dinitrosalicylic acidovalbumin (DNSA-OVA) immunoconjugate structurally different from DNSHA-OVA was designed and used as a “substructural coating antigen” to improve the sensitivity of an indirect ELISA analysis for a direct DNSH detection. Based on the “substructural coating antigen” concept, an optimized indirect ELISA method was established that exhibited good specificity and high sensitivity for detecting DNSH, with a cross-reactivity of less than 0.1% (excluding the parent compound nifursol), IC50 of 0.217 nmol/mL and detection limit of 0.018 nmol/mL. Finally, a simple and efficient analysis of DNSH samples in chicken tissues showed that the average recovery rate of the indirect ELISA analysis was 82.3%, with the average coefficient of variation 15.9%. Thus, the developed indirect ELISA method exhibited the potential for a rapid detection of DNSH residues in tissue.
The Friendship between Hsu Chih-mo and Russell and Its Impact
徐志摩与罗素的交游及其所受影响

LIU Hong-tao,
刘洪涛

浙江大学学报(人文社会科学版) , 2006,
Abstract: 徐志摩1920年离美赴英求学的真正原因不是为师从罗素,而是想追随政治学家拉斯基。徐志摩最终没能够拜罗素为师,也不是因为罗素为了反战和离婚已经被剑桥大学“除名”。罗素1921年是主动辞职离开剑桥,与反战和离婚无关。徐志摩于1920年10月与罗素建立联系,当时伦敦英国华人协会、剑桥邪学社分别邀请罗素夫妇发表演讲,徐志摩都是积极的参与者;由于徐志摩的穿针引线,梁启超的英文著作得以纳入由罗素担任学术顾问的“心理学、哲学与科学方法国际文库”。徐志摩还著文研究了罗素的政治观、中国观,以及儿童教育思想,这些文章反映了徐志摩对罗素思想的认识及所受影响。
Research on the Generation Capacity of Neutral Network Based on Conformity Thoughts
基于整合思想的神经网络泛化能力改进研究

HUANG Hong-Tao,
黄宏涛

计算机科学 , 2008,
Abstract: Generation capacity of neutral network is the important facet impacting on its usability. In this essay, many separate modified measures are conformed and the process of constitution and training of neutral network is fashioned. This essay makes an analys
A New Bi-directional Selection RBF NN Algorithm Based on Gaussian Function
一种基于Gaussian函数的双向选择径向基函数神经网络算法

HUANG Hong-Tao,
黄宏涛

计算机科学 , 2007,
Abstract: RBF NN is an important Neutral Network algorithm. This paper summarizes the existing RBF NN algorithms and classifies it into forward-direction selection algorithm and back-direction selection algorithm. A new bi-directional selection RBF NN Algorithm based on Gaussian Function (BSRBF is proposed from the view of enhancing the capacity of generalization of Neutral Network.On the base of analyzing their advantages and disadvantages,this paper researches the elementary technologies and methods of the selection of nerve cell and set forth basis thought and steps of the algorithm. In the end, the validity of BSRBF algorithm is validated through an experiment.
Application and Prospect of Geographical Information System in Strategic Environmental Assessment
Hong-tao BAI,He XU
Advances in Natural Science , 2008, DOI: 10.3968/37
Abstract: Strategic environmental assessment (SEA) is a new and promising tool to evaluate the possible environmental impacts and other sustainability aspects of government policies, plans and programs as well as their alternatives, aiming at the effectively integration of environmental concerns into their decision-making processes. It is recognized that spatial issues are always evolved in the SEA process for the reason that the strategic decision-maker pays much attention to the geographical distribution of various impacts. The essential features of strategic decisions, such as the macro-scale on time and geography, complexity of spatial information and social-economic-environmental multiplex system, are leading to the insufficiency of traditional EIA-based methods in assisting strategic decision-making. SEA practitioners have to seek for more effective approaches to handle the spatial uncertainties. Geographical information system (GIS), integrating computer design and database technology, is able to gather, simulate, analyze and display spatial information effectively, and provides a technological support to the synthesized evaluation and quantitative analysis. Based on the statement of SEA conception and characteristics, the author employs a detailed discussion on the advantages of GIS in SEA process and finds that GIS can not only help SEA operators to grasp the macro-scale of time and geography of strategic decisions much better, but also provide visible and intuitionistic displays on the spatial information to make decision-makers and publics understanding and accepting final conclusions much easier. Meanwhile, the author indicates that GIS with various tools, simulation models and powerful spatial analysis functions, can contribute to a more scientific, synthetic forecast and cumulative effects evaluation; provide much more quantitative analysis and improve the reliability of SEA results. Finally, the challenges and prospects of GIS in SEA process are presented in this paper. Key words: Strategic environmental assessment; Geographical information system; Information display; Spatial analysis Financial supports from National Social Sciences Fund (NSSF) in China: Research on Circular Economy Based on Win-win of Economic Development and Ecological Environmental Protection (06&ZD029) are highly appreciated.
Impurity effect on weak anti-localization in the topological insulator Bi2Te3
Hong-Tao He,Gan Wang,Tao Zhang,Iam-Keong Sou,George K. L. Wong,Jian-Nong Wang,Hai-Zhou Lu,Shun-Qing Shen,Fu-Chun Zhang
Physics , 2010, DOI: 10.1103/PhysRevLett.106.166805
Abstract: We study weak anti-localization (WAL) effect in topological insulator Bi2Te3 thin films at low temperatures. Two-dimensional WAL effect associated with surface carriers is revealed in the tilted magnetic field dependence of magneto-conductance. Our data demonstrates that the observed WAL is robust against deposition of non-magnetic Au impurities on the surface of the thin films. But it is quenched by deposition of magnetic Fe impurities which destroy the pi Berry's phase of the topological surface states. The magneto-conductance data of a 5 nm Bi2Te3 film suggests that a crossover from symplectic to unitary classes is observed with the deposition of Fe impurities.
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