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Wavelet analysis of sunspot relative numbers

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Chinese Science Bulletin 2002年第7期47卷 609-612页

作者： HAN Yanben & HAN YonggangNational Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, china Department of Applied Mathematics, Beijing polytechnic university, Beijing 100022, china National Astronomical Observatories Chinese Academy of Sciences Beijing China Department of Applied Mathematics Beijing Polytechnic University Beijing China

The time series of the monthly smoothed sun-spot numbers in 174.-2000 is analyzed with the wavelet. The result shows that besides the known time-variation of the period about 11 years, other main periods of the sunspot numbers, such as the periods of about 100 years and so on, vary with time. We suggest that the time-variation of the main periods is the manifestation of the complex variation of sunspot numbers. It is significant to make a thorough study of the character and mechanism of the time-variation of the periods for proving prediction of sunspot numbers, especially for understanding the variation process of sunspot numbers.

关键词： sunspot numbers prediction wavelet time-variation.

Solvation effects on brain uptakes of isomers of ^(99m)Tc brain imaging agents

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Chinese Science Bulletin 2002年第21期47卷 1786-1791页

作者： JIA Hongmei, MA Xiaohui, WANG Cunxin & LIU Boli1. Department of Chemistry, Beijing Normal university, Beijing 100875, china 2. Center for Biomedical Engineering, Beijing polytechnic university, Beijing 100022, china Department of Chemistry Beijing Normal University Beijing 100875 China Center for Biomedical Engineering Beijing Polytechnic University Beijing 100022 China

Analysis of electrostatic hydration free energies of the isomers of the 99mTc-BAT and 99mTc-DADT complexes is carried out using the computer simulation technique. The results show that not only a correlation exists between the logarithm of the brain uptake and the electrostatic hydration free energy for the isomers of 99mTc-brain radiopharmaceu-ticals, but also a linear relationship exists between the logarithm of the ratio of the brain uptake of the syn isomer to that of the anti one and the difference between the electrostatic hydration free energy of the syn-isomer and that of the anti one. Furthermore, the investigation on the important factors influencing the brain uptakes of 99mTc-radiophar-maceuticals and the reasons of the different biodistribution of the isomers of the 99mTc-complexes is explored at the molecular level. The results may provide a reference for the rational drug design of brain imaging agents.

关键词： 99mTc-brain imaging agent isomer brain uptake electro-static hydration free energy.

Some Practice and Ideas on Education Reform of Numerical Analysis Course

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Some Practice and Ideas on Education Reform of Numerical Ana...

On Cardinal Wavelets with Compact Support and Their Duals

2010 The 2nd International Conference on Industrial Mechatronics and Automation (ICIMA 2010)

作者： Dianxuan Gong Aimin Yang Ling Wang College of Science hebei polytechnic university tangshan hebei 063.09 china Chuanan Wei Department of Information Technology Hainan Medical College Haikou Hainan 571101 china

As a required course in polytechnic schools,"Numerical Analysis" is the bridge between the practical application and mathematic *** on the course features and some problems encountered in the teaching process,we carried out some research on education reforms,and put forward some ideas on teaching content and teaching *** these achieved good results in teaching practice.

关键词： Numerical Analysis Scientific Computing Teaching Methods Teaching Mode

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Acta Mathematica Sinica,English Series 1997年第1期13卷 127-132页

作者： Liu Youming (Department of Applied Mathematics,Beijing polytechnic university,Beijing 100022,china) 北京工业大学应用数学系北京

Some people try to construct an orthonormal wavelet such that the corresponding scaling function（t）has the cardinal property,i.e.（n）=δn0,since such wavelets have many good ***]y it is impossible to do so,except for a trivial *** this work,a family of non-orthogonal cardinal wavelets with compact support is constructed and their duals are investigated.

关键词： wavelet cardinal scaling function dual

The Quaternion Matrix Equation ∑A^iXB_i=E

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Acta Mathematica Sinica,English Series 1998年第1期14卷 91-98页

作者： Huang Liping Department of Basic Sciences, Xiangtan polytechnic university, Xiangtan 4.1201, china Department of Basic Sciences Xiangtan Polytechnic University

Let H_F be the generalized quaternion division algebra over a field F with charF≠2. In this paper, the ad joint matrix of any n×n matrix over H_F[λ] is defined and its properties is discussed. By using the adjoint matrix and the method of representation matrix, this paper obtains several necessary and sufficieut conditions for the existence of a solution or a unique solution to the matrix equation sum from n=i to k A^iXB_i=E over H_F, and gives some explicit formulas of solutions.

关键词： Generalized quaternion matrix Adjoint matrix Matrix equation Representation matrix

INFRARED DETECTOR USING SUPERCONDUCTING YBa_2Cu_3O_7-δTHIN FILMS

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Journal of Wuhan university of Technology(Materials Science) 1999年第4期14卷 40-47页

作者： WU Youyu YI XinjianWuhan Automotive polytechnic universityHuazhong university of Science and Technology Wuhan Automot. Polytech. university China School of Electronic and Information Wuhan Automot. Polytech. University Wuhan 430070 China Huazhong Univ. of Sci. and Technol. China

The patterning technologies and process order of high Tc(86K) super-conducting film bolometers have been studied. After the deposition, a conventional lithographic process was used to pattern the films with aqueous solution of HCl, and then the films were transferred into a tube furnace for annealing to form superconducting film. It eliminates the degradation of patterning process. The bolometric responsivity of approximately 34. 32 V/W is measured, and the detectivity is greater than 1. 62× 108cm · Hz1/2 · W-1, the noise equivalent powers NEP is 2. 1×10-9W.

关键词： bolometer patterning etching solu- tion YBa_2Cu_3O_7 δ superconducting films

The Design for Human-Simulated Intelligent Coordinated Control System in Penicillin Fed-batch Fermentation Process

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The Design for Human-Simulated Intelligent Coordinated Contr...

First-principle study of interaction of H2 and H2O molecules with （ZnO）_n（n=3-6） ring clusters

2009中国控制与决策会议

作者： Feng Qian~1,WangLei~2,Lu Chunguang~1,Li Yaogang~1,Zhao Shuzhong~1 1.College of Mechanical Engineering,hebei polytechnic university,tangshan {4.,china 2.Library,hebei polytechnic university,Taneshan {4.,china

＜正＞This paper aims at the control problem of penicillin fed-batch fermentation process,proposes a method for designing the control strategies of penicillin fed-batch fermentation process based on Simulating Human Intelligent Control *** object of this paper is the penicillin fermentation *** it has established the dynamic mathematical model for specific growth rate and pH value which can reflect the fermentation process *** Human-Simulated intelligent coordinated control and Human-Simulated intelligent fuzzy control are incorporated into the control of the fermentation process for *** fermentation fed system has been carried the dynamic decoupling control into *** algorism has accomplished intelligent disposal in the fermentation process control and achieved purpose of the control for the fermentation production.

关键词： large time-delay system Human-Simulated intelligent control Human-Simulated intelligent coordinated control Human-Simulated intelligent fuzzy control

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Progress in Natural Science:Materials International 2010年第1期20卷 30-37页

作者： Hua-peng CHEN~1,Jian-ning DING~(2,3),Ning-yi YUAN~2,Xiu-qin WANG~2,Cheng-lung CHEN~4.Duan WENG~(1*) 1.Department of Materials Science and Engineering,Tsinghua Universtiy,Beijing 100084.china 2.Center for Low-dimensional Materials,Micro-nano Devices and System, Jiangsu polytechnic university,Changzhou 213164.china 3.Key Laboratory of New Energy Source,Changzhou 213164.china 4.Department of Chemistry,National Sun Yat-sen university,Kaohsiung 804.4.Taiwan,china Department of Materials Science and Engineering Tsinghua Universtiy Beijing 100084 China Center for Low-dimensional Materials Micro-nano Devices and System Jiangsu Polytechnic University Changzhou 213164 China Key Laboratory of New Energy Source Changzhou 213164 China Department of Chemistry National Sun Yat-sen University Kaohsiung 80424 Taiwan China

A density functional calculation was performed to investigate the impact of hydrogen and water molecules on zinc oxide clusters（ZnO）n=3-6…X,where X=H2and *** calculated binding energies were corrected for the basis set superposition error （BSSE）.The structural parameters and chemical hardness were calculated for the complexes of zinc oxide clusters and guest *** strength values of the interaction between the clusters and the guest molecules were analyzed based on the topological properties of atoms in molecules（AIM）theory of *** stereo electronic interactions inside the ZnO clusters were analyzed in detail using the natural bond orbital（NBO）analysis.

关键词： density functional theory zinc oxide clusters atoms in molecules

A Characterization for Windowed Fourier Orthonormal Basis with Compact Support

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Acta Mathematica Sinica,English Series 2001年第3期17卷 501-506页

作者： You Ming LIU Department of Applied Mathematics,Beijing polytechnic university.Beijing 100022,P.R.china E-mail:liuym@*** Department of Applied Mathematics Beijing Polytechnic University Beijing 100022 P. R. China

Let g（x） ∈L2（R） and （ω） be the Fourier transform of g（x）.Define gmn（x）=eimxg（x- 2πn）.In this paper we shall give a sufficient and necessary condition under which {gmn（x）} constitutes an orthonormal ba... 详细信息

关键词： Windowed Fourier basis Congruence