检索结果-南通市图书馆

Nonlinear dynamics of angle-ply composite laminated thin plate with third-order shear deformation

在线全文

cnki会议

学校读者我要写书评

暂无评论

science China(Technological sciences) 2010年第3期53卷 612-622页

作者： GUO Xiang Ying,ZHANG Wei & YAO MingHui College of Mechanical Engineering,Beijing university of technology,Beijing 100124,China College of Mechanical Engineering Beijing University of Technology

An asymptotic perturbation method is presented based on the Fourier expansion and temporal rescaling to investigate the nonlinear oscillations and chaotic dynamics of a simply supported angle-ply composite laminated rectangular thin plate with parametric and external *** to the Reddy's third-order plate theory,the governing equations of motion for the angle-ply composite laminated rectangular thin plate are derived by using the Hamilton's ***,the Galerkin procedure is applied to the partial differential governing equation to obtain a two-degrees-of-freedom nonlinear system including the quadratic and cubic nonlinear *** equations are utilized to deal with the resonant case of 1:1 internal resonance and primary parametric resonance-1/2 subharmonic ***,the stability analysis is given for the steady-state solutions of the averaged *** on the averaged equation obtained by the asymptotic perturbation method,the phase portrait and power spectrum are used to analyze the multi-pulse chaotic motions of the angle-ply composite laminated rectangular thin *** certain conditions the various chaotic motions of the angle-ply composite laminated rectangular thin plate are found.

关键词： angle-ply composite laminated plate third-order shear deformation theory parametric excitation chaotic motion

The Study on Real Estate Supply Chain Trust Management Based on Game Theory

在线全文

学校读者我要写书评

暂无评论

The Study on Real Estate Supply Chain Trust Management Based...

工程和商业管理国际学术会议

作者： Chunyu ZHOU Southwest university of science and technology Mianyang China

Trust mechanism is the foundation for the effective operation of real estate supply chain,the success of real estate project is largely based on the performance and maintenance of trust *** game analysis,which selects the real estate enterprise and contractor in the supply chain,showed that if desired trust action to be the participants’ optimal choice,the critical step is to transform one-time game into repeated games,namely constructing cooperative relationship based on long term trust among the real estate supply chain ***,the establishment of trust mechanism in real estate supply chain is an effective measure to solve long term cooperation,through maintaining trust relationship among participants to increase the supply chain operation *** on analysis of the features of real estate supply chain trust relationship,this paper established the process model of the real estate supply trust mechanism,detailed discussed the strategies of constructing real estate supply chain trust mechanism.

关键词： real estate supply chain trust game theory establishment

APPLICATION OF MOLECULAR ORBITAL THEORY TO ANALYSIS OF PHASE STABILITY FOR ALLOYS

在线全文

cnki会议

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(English Letters) 1993年第3期6卷 145-152页

作者： YIN Hong TAO Kun PAN Jinsheng LI Hengde Tsinghua university,Beijing,China professor.Department of Materials science and Engineering,Tsinghua university,Beijing 100084,China Tsinghua Univ Beijing China

The critical _d vahues ( _ ) of the γ/(γ+σ).γ/(γ+μ) and γ/(γ+γ') phase boundaries in some ternar alloy phase diagrams at various temperatures are calculated by averaging the _d values of sererai selected characteristic points at the phase *** equations for the temperature dependence of the critical _d of γ/(γ+σ).γ/(γ+μ) and γ/(γ+γ') phase boundaries are *** accuracy of the analysis is discussed in detail. It is found for the first time that the average value of the bond order _ at the phase boundaries ts also approximatelr a constant and therefore a critical average bond order _ like - can be introduced for the analysts of phase stability

关键词： molecular orbital theory allov phase stabilitv

在线全文

学校读者我要写书评

暂无评论

试论唐代船商的地域特征和经济实力

思想战线 2001年第5期27卷 123-127页

作者：谷更有云南大学中国经济史研究所云南昆明650091

唐代内河航运发达 ,素有“江河帝国”之誉。便利的水运条件带来水上商业的繁荣 ,船商因而得以发展壮大。就其地域而言 ,船商的发展是以淮河为界 ,北不如南 ,且南方船商又多以沿河城镇和江南、岭南的山地、丘陵地区为主。唐代船商按其活... 详细信息

唐代内河航运发达 ,素有“江河帝国”之誉。便利的水运条件带来水上商业的繁荣 ,船商因而得以发展壮大。就其地域而言 ,船商的发展是以淮河为界 ,北不如南 ,且南方船商又多以沿河城镇和江南、岭南的山地、丘陵地区为主。唐代船商按其活动范围大致可分为跨域性船商、区域性船商和地方性船商三类。跨域性船商是船商中最富有的阶层 ;区域性船商和地方性船商 ,多以城镇和草市为中心 ,对繁荣地方经济起着不可低估的作用。

关键词：船商地域特征经济实力

The initial and final state of SNe Ia from the single degenerate model

在线全文

学校读者我要写书评

暂无评论

science China(Physics,Mechanics & Astronomy) 2010年第9期53卷 1732-1738页

作者： MENG XiangCun1,YANG WuMing1 & LI ZhongMu2,3 1School of Physics and Chemistry,Henan Polytechnic university,Jiaozuo 454000,China 2Institute for Astronomy and History of science and technology,Dali university,Dali 671003,China 3National Astronomical Observatories,Chinese Academy of sciences,Beijing 100012,China Henan Polytechnic university School of Physics and Chemistry Jiaozuo China (GRID:grid.412097.9) (ISNI:***) Dali university Institute for Astronomy and History of Science and Technology Dali China (GRID:grid.440682.c) Chinese Academy of sciences National Astronomical Observatories Beijing China (GRID:grid.9227.e) (ISNI:***)

Although type Ia supernovae(SNe Ia) show their importance in many astrophysical fields,the nature of the progenitors of SNe Ia is still *** present,the single degenerate(SD) model is presented to be a very likely progenitor *** the comprehensive SD model developed by Meng & Yang(2010),we show the initial and final state of the progenitor systems of SNe Ia in an orbital period—the secondary mass(log Pi,M2i) *** results may explain the location of some supersoft X-ray sources and recurrent novae in the(log Pi,M2i) plane,and be helpful to judge whether an SD system is the potential progenitor system of SNe Ia,as well as to simulate the interaction between SN ejecta and its companion.

关键词： binaries:close stars:evolution supernovae:general white dwarfs

A current-mode RF transmitter for 6–9 GHz MB-OFDM UWB application

在线全文

学校读者我要写书评

暂无评论

science China(Information sciences) 2011年第2期54卷 419-428页

作者： CHEN YunFeng1, FAN JinHan1, LI Wei1, LI Ning1 & REN JunYan1,2 1State Key Laboratory of ASIC & System, Fudan university, Shanghai 201203, China 2Micro-/Nano-Electronics science and technology Innovation Platform, Fudan university, Shanghai 201203, China State Key Laboratory of ASIC & System Fudan University

This paper presents a current-mode 6–9 GHz RF transmitter for MB-OFDM UWB systems. The proposed current-mode transmitter consists of current-mode IQ LPF, current mirror amplifier, IQ up-conversion mixer (up-mixer), differential power driver amplifier (PA) and high-speed divider with LO buffers for generating IQ LO signals. All circuits are designed to possess high linearity and wide bandwidth. The transmitter is fabricated in TSMC 0.13 μm 1P8M RF CMOS technology with a die area of 1.56 mm2. Measurement results show that a maximum output power of -0.7 dBm with an LO leakage/sideband rejection ratio (LOL/SB RR) around -33/ - 35 dBc is achieved, and that this transmitter excels the traditional voltage-mode counterpart in terms of high linearity (about +1 dBm output 1-dB compression point, +10 dBm output IP3 in average) with comparable power consumption (drawing 48 mA current from 1.2 V supply).

关键词： current-mode RF transmitter high linearity MB-OFDM UWB high speed divider CMOS

Open charm production in sqrt(sNN)=200 GeV collisions at RHIC

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Open charm production in sqrt(sNN)=200 GeV collisions at RHI...

第十三届全国核物理大会暨第八届会员代表大会

作者： Yifei Zhang university of science and technology of China STAR Collaboration

Charm quarks are a unique tool to probe the partonic matter created *** heavy-ion collisions at RHIC *** considerations assume that charm quarks are produced only in the early stages via initial gluon fusion and that their production cross-section can be calculated by perturbative *** the binary collision scaling of the

关键词：

Finite Element Analysis on Electrode Structure of QCM

在线全文

cnki会议

学校读者我要写书评

暂无评论

Finite Element Analysis on Electrode Structure of QCM

2009中国控制与决策会议

作者： Haifeng Jiang Institute of Automation,NanJing university of science and technology

＜正＞Because quartz crystal is complex at high frequency vibration,the only vibration mode of QCM will be destroyed at some designs of electrode structures and couplings with other vibration modes will happen *** paper makes a 3D model for QCM and analyzes directly the coupled phenomenon of the structural and electric fields of QCM with finite element *** analyzing the convergence of the resonant frequency of QCM,the correctness of finite element analysis is *** the influence of different sizes of electrode on vibration of QCM and an optimal size of electrode is *** design of mesa on crystal plate is provided to solve the question that energy trapping is not good *** design proves valid based on finite element calculation and the optimal height of mesa is given.

关键词： QCM coupling finite element energy trapping

Local asymptotic behavior of the survival probability of the equilibrium renewal model with heavy tails

在线全文

cnki会议

学校读者我要写书评

暂无评论

science China Mathematics 2005年第3期48卷 300-306页

作者： JIANG Tao & CHEN Yiqing School of Finance. Nanjing university of Finance and Economics, Nanjing 210003, China School of Economics and Management, Guangdong university of technology, Guangzhou 510090, China School of Finance Nanjing University of Finance and Economics Nanjing China School of Economics and Management Guangdong University of Technology Guangzhou China

Recently, Tang established a local asymptotic relation for the ruin probability in the Cramer-Lundberg risk model. In this short note we extend the corresponding result to the equilibrium renewal risk model.

关键词： geometric sums, heavy-tailed distribution, ladder height, the equilibrium renewal model, the ruin probability.