作者: 张卫民,王西彬 (北京理工大学)
出处: 中国机械工程 2001 第12卷 第9期 P62-64,5-6
关键词: 非线性;金属切削;检测;切削力
摘要: 对金属切削中的一类非线性问题——切屑流屑角的突变进行了检测实验研究 ,得出了流屑角突变时刻的力、振动和声发射信号。多次实验表明 ,这 3种信号中对切削过程的非线性特征以切削力信号最为灵敏。根据传感器突变信号的产生时间 ,可以计算出突变时的切削层厚度 aw 和切削层图形系数 gs
作者: 王毅,倪国强,李勇量 (北京理工大学光电工程系 北京;北京理工大学光电工程系)
出处: 北京理工大学学报 2001 第6期 P765-769
关键词: 图像融合;实时数字图像处理;数字信号处理器
摘要: 介绍在可见光 -长波红外双波段图像融合高速处理平台上实现多分辨图像融合算法的设计方案 .该硬件平台采用高速数字信号处理器 TMS32 0 C6 2 0 1DSP及多种适于高速数字图像处理的结构 ,在软件设计时 ,针对图像多分辨分解与重构运算过程的特点采取了多项优化措施 ,较好地解决了图像融合算法大运 ...
作者: 孙常胜,陈杰,窦丽华 (北京理工大学 (100081))
出处: 兵工学报 2001 第1期 P15-18
关键词: 滑动模态变结构控制;坦克稳定器;鲁棒控制;非线性控制
摘要: 以坦克水平向稳定器为例研究坦克稳定器滑动模态变结构控制(VSC)技术。用优化方法确定切换函数,用到达条件确定变结构控制律。仿真表明该设计方法大大优于传统设计,为稳定器设计提供了一种切实可行的新方法。
作者: Li, Haizhu1;Wang, Jianfang1;Sun, Liang2; (1Institute of Applied Mathematics, Academia Sinica, Beijing 100080, China;2Department of Applied Mathematics, Beijing Institute of Technology, Beijing 100081, China)
出处: Acta Mathematicae Applicatae Sinica 2000 Vol.16 No.1 P78-86
摘要: In this paper, it is proved that any connected Cayley graph on an abelian group of order pq or p2 has a hamiltonian decomposition, where p and q are o ...
作者: Wang, Yifu1;Wu, Zhuoqun2;Yin, Jingxue2; (1Department of Applied Mathematics, Beijing Institute of Technology, Beijing 100081, China;2Department of Mathematics, Jilin University, Changchun 130023, China)
出处: Acta Mathematicae Applicatae Sinica 2000 Vol.16 No.2 P180-187
摘要: This paper is devoted to the time periodic solutions to the degenerate parabolic equations of the form ∂u/∂t=Δum+up(a(x,t)-b(x,t)u) in Ω×R under the D ...
作者: Yao Duan-zheng (1);Song Ke-hui (2);Xiong Gui-guang (1); (1.Department of Physics,Wuhan University,Wuhan,China;2.Department of Physics,Beijing institute of Technology,Beijing,China)
出处: Wuhan University Journal of Natural Sciences 2000 Vol.5 NO.2 P169-174
关键词: Cauchy’s problem - wave equation - D’Alembert’s formula
摘要: A simple method for solving Cauchy’s problem of wave equations in higher space dimensions with initial condition of separated variables, has been give ...
作者: Qiu, WG;Chen, SS;Yu, YZ (1Beijing Inst Technol, Sch Chem Engn & Mat Sci, Beijing 100081, Peoples R China.)
出处: CHINESE JOURNAL OF CHEMISTRY 2000 Vol.18 No.5 P756-758
关键词: CHROMIC-ACID OXIDATION; HEXABENZYLHEXAAZAISOWURTZITANE; DEBENZYLATION; TETRALINS
摘要: The oxidative reactivity of 2,6,8,12-tetraacetyl-4,10-dibenzyl-2,4,6,8,10,12-hexaazatetracyclo[5.5.0.0(5,9).0(3,11)] dodecane (3) in several condition ...
作者: Ge, Weigao1;Yu, Yuanhong2; (1Department of Applied Mathematics, Beijing Institute of Technology, Beijing 100081, China;2Institute of Applied Mathematics, Chinese Academy of Sciences, Beijing 100080, China)
出处: Acta Mathematicae Applicatae Sinica 1999 Vol.15 No.2 P190-196
摘要: Five criteria are given for the existence of periodic solutions to DDEs of the form ẋ(t)= - Σi=1nδif(x(t- ri)), where δi∈{-1,1}. These results extend ...
作者: Wang, Yifu1;Yin, Jingxue2; (1Department of Applied Mathematics, Beijing Institute of Technology, Beijing 100081, China;2Department of Mathematics, Jilin University, Changchun 130023, China)
出处: Acta Mathematicae Applicatae Sinica 1999 Vol.15 No.2 P113-125
摘要: Basing on the L1-type estimates, we present a semigroup approach to the initial value problem for a doubly nonlinear degenerate parabolic equation, ar ...
作者: Shao, B;Zou, J (1Beijing Inst Technol, Dept Appl Phys, Beijing 100081, Peoples R China.)
出处: CHINESE PHYSICS LETTERS 1998 Vol.15 No.6 P393-394
摘要: Electron interference related to Aharonov-Bohm effect in the presence of the two-mode quantized radiation held is investigated. Characteristics of the ...
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