局部网络范围的优选

本文通过引入“网内信息比”(Intra-area traffic ratio)的概念,确立了从经济考虑出发,恰当确定一个中继交换局和若干个地区交换台组成的局部网络 范围的准则。若网内信息比相对于网络半径的斜率等于每公里中继线的成本与出网的每条链路的成本之比,则该局部网的半径是最合理的。本文给出了确定网内信息比的经验公式。     

基于完备系统概念的C IM S

总结了计算机集成制造（系统）（ＣＩＭ（Ｓ））概念的发展过程;给出了完备系统的定义;讨论了在完备系统概念下ＣＩＭＳ的有关思想,目标,结构等问题,并提出了ＣＩＭ（Ｓ）的新概念、轮图和分析模型。     

陀螺仪漂移测试与补偿系统的研制

从硬件、软件两方面简要介绍了所研制的“陀螺仪漂移测试与补偿系统”的组成结构、控制功能及工作过程。应用多变量过程控制系统解耦理论,采用对角矩阵法选择了解耦网络,设计了一套陀螺漂移力矩反馈法测试与数据自动采集系统;提出了一种对其随机漂移进行自适应控制补偿的方法,设计了具体的控制回路对其随机漂移进行实时补偿。     

复杂回转面刀具的计算机辅助造型与加工过程仿真

加工旋转锉复杂回转面刀具时，砂轮与工件的相对运动轨迹一般是复杂运动，只有用多坐标联动的数控装置才能实现，为了验证理论推导和计算的正确性，本文对旋转锉的加工过程进行了计算机仿真，为充分利用国内外在计算机图形学和CAD方面的最新成就，本文在重庆大学机械传动国家重点实验室的Sum-CAD工作站上对引进的I-deas软件包进行了应用开发，第一次将计算机造型应用于复杂回转面刀具有成形与加工，该工作站及三维图形功能对于特种回转面刀具是一个强有力的研究工具。     

城市快速交通线项目的最优票价与政府补偿

基于乘客时间价值模型和交通运量的价格弹性模型 ,分别以“票款收入最大”和“在充分发挥项目运能前提下票款收入最大”为目标 ,构造了两种城市快速交通线项目最优票价模型 .在此基础上 ,提出了政府对城市快速交通线项目给予经济补偿的原则和补偿强度的测算方法 .     

灰色离散双层漂移型线性规划模型及其交互式补偿模糊算法

提出灰色离散双层漂移型线性规划的概念，建立了灰色离散双层漂移型线性规划模型来描述具有灰色信息的递阶离散双层系统的决策问题，并提出相应的交互式补偿模糊算法，最后通过算例证明提出的求解灰色离散双层漂移型线性规划模型的交互式补偿模糊算法的简单性和实用性。     

系统学二象论初探：一个理论框架

从概念上把任一客观对象分做虚(X*)实(X)两个层次来研究,形成“二象系统”,着重就任一对象与其属性空间的所谓典型“二象系统”来讨论;通过概念的深入分析和数学描述,发现这是一个极具前景的领地;揭示出数学式中参数空间的客观实在;发现这是个以物理学中“二相”论,数学中“对偶”论,哲学中“辨证”论和东方哲学中“阴阳”论为其特例的,因此是有望统一上述多个独立、平行发展的既有分支的一门基础学科领域.本文可说只是提出了这一问题,尚待建立其理论体系,工作还很多.文末提出的若干研究方向和课题可供有兴趣的读者选题参考.     

关于创新研究中几个重要概念的系统辩证思考

“创新”、“风险”、“高新技术”是目前创新研究以及风险投资研究中使用频度最高的三个概念，对涉及以上三个概念界定的有代表性的观点进行了评述，并分别提出了自己的界定方案。     

一种新的免疫进化算法及其性能分析

基于免疫系统中的进化机理，提出了一种免疫进化算法。首先引入了邻域概念，并通过定义扩展半径和突变半径两个新算法参数而构造了较小和较大两个邻域。进而给出了扩展和突变操作分别利用这两个邻域进行局部和全局搜索，实现了从全局到局部的两层邻域搜索机制。分析了算法的优化机理和收敛性。仿真结果表明该算法具有不易陷入局部最优、解的精度高、收敛速度快等优点。     

基于有向自然连通度的作战网络抗毁性研究

介绍了作战环的概念,建立了基于作战环的武器装备体系作战网络模型,提出了有向自然连通度指标作为作战网络抗毁性测度。为验证其可行性与有效性,设计了3个仿真实验:边减少、边增加与连接概率增加仿真实验,比较分析有向自然连通度与Laplace矩阵谱半径分别作为抗毁性测度指标的评估效果。研究表明:与Laplace矩阵谱半径指标相比,有向自然连通度指标更加敏感精准;抑制作战网络侦察节点侦察能力对抗毁性影响最为显著;可以通过提高武器装备体系侦察信息准确性、指控能力、火力打击能力及通信能力来增强作战网络抗毁性。     

Improving the simulation efficiency in five-axis milling by using an advanced octree and an implicit formula of a generalized cutter

This paper presents an advanced octree （AO-rep） model and an implicit formula of a generalized cutter model for five-axis milling simulation. First, the main ideal of the AO-rep model is building a hierarchical structure and representing solid volumes. The AO-rep model utilizes an octree to cull unrelated voxels, and generates a small-scale voxel model in grey octants when a cutter intersects these octants. Using a simplified intersection computation between a cube and triangles in E3, an STL model can be converted into its AO-rep model at a preprocessing stage. Second, the authors formulate an implicit function of a generalized cutter in moving cutter frame, and determine the function in fixed workpiece frame using the theory of a rigid body motion. Finally, the authors make a simulation of machining an impeller. The result shows that the proposed approach has a high performance of time and space.     

CNC铣齿机床加工曲线齿锥齿轮仿真系统的研究

从空间占位角度对曲线齿锥齿轮加工过程进行了分析，得出了建立CNC铣齿机床加工仿真系统的基本思想。以AutoCAD为开发平台，建立了简化后的刀具和齿轮毛坯实体零件库；同时，将CNC铣齿机床各轴运动转化到刀具和齿轮毛坯的相对位置调整，通过刀具和齿轮毛坯的相减布尔运算实现了仿真切齿过程。最后给出了加工仿真实例和实际加工结果，验证了加工仿真方法的正确性。为设计和制造都很复杂的曲线齿锥齿轮加工提供了一个非常形象的加工仿真工具。     

Variable feedrate interpolation of NURBS Toolpath with geometric and kinematical constraints for five-axis CNC machining

Variable feedrate interpolation algorithms for five-axis parametric toolpath are very promis- ing but still rather limited currently. In this paper, an off-line feedrate scheduling method of dual NURBS curve is presented with geometric and kinematical constraints. For a given dual parametric curve, the feedrates of sampling points are first scheduled sequent with confined feedrate of cutter tip and machine pivot, chord error, normal acceleration and angular feedrate. Then, the feedrate profiles of angular feed acceleration sensitive regions of the path are adjusted using a bi-directional scanning algorithm. After that, a linear programming method is used to adjust the feedrate profiles of linear feed acceleration sensitive regions and control the linear feed acceleration of both cutter tip and machine pivot within preset values. Further, a NURBS curve is used to fit the feedrates of sampling points. Finally, illustrative examples are carried out to validate the feasibility of the proposed feedrate schedul- ing method. The results show that the proposed method has the ability of effectively controlling the angular feed characters of cutter axis as well as the chord error and linear feed characters of cutter tip and machine pivot, and it has potential to be used in high accuracy and high quality five-axis machining.     

A control algorithm for rapid movements near the radius compensation singularity in five-axis end milling

When the five-axis CNC system executes the 3D cutter radius compensation function, the angle between two adjacent radius compensation vectors might become very large and the linear axes would move too fast if the tool orientation vector is close to the surface normal. The reason that results in this phenomenon is analyzed based on building the transmission relationship between the cutter contact point and the cutter location point. By taking the square-end tool as an example, an optimization algorithm to control the undesired movements is advanced. For the singular area where sudden change exists, the number of interpolation cycles is determined by the cutter feedrate, the limit speeds of machine axes and the maximum allowable angle between radius compensation vectors of adjacent NC blocks. The radius compensation vector of each interpolation cycle is obtained by a kind of vector rotation method. By maintaining the perpendicularity between the radius compensationvector and the tool orientation vector, the rapid movements of the linear axes are eliminated. A trial-cut experiment is performed to verify the correctness and the effectiveness of the proposed algorithm.     

可拓方法在加工中心刀库方案设计中的应用

根据可拓学理论,采用物元的发散性思维,研究可拓方法在加工中心刀库设计中的应用,并运用优度评价法进行收敛,从而得出最优设计方案．文中介绍了加工中心总体方案设计的知识结构,并给出刀库方案设计实例     

多传感器数据融合方法在系统建模中的应用

阐述了多传感器数据融合建模的几类典型的方法,重点分析了基于传统多元统计理论的分析法、最小二乘法、人工神经网络等方法的基本原理和各自的技术特点.同时,较为详细地介绍了一种新颖、有效的数据融合建模方法--偏最小二乘回归分析方法(PLSR),并在文章结尾给出了一个运用该方法分析刀具磨损量的实例.     

On the reality of systems

Modern systems thinking has paradoxes implicit in its theories and these are present because of the relationship between the concept of system and the concept of reality. This paper explores those concepts by looking at five different perspectives within a phenomenological view of reality. Checkland's methodology is criticized for its treatments of systems and reality. Implications for practice are discussed.     

非平衡与非线性——科学发展观的系统范式

试从系统论的角度来分析科学发展观,认为科学发展观是一种系统范式,其本身就是系统观。通过分析认为科学发展观是非平衡发展观,是非线性发展观,在实践中贯彻落实科学发展观对经济社会发展意义重大。     

On the observability of free Boolean networks via the semi-tensor product method

This paper investigates the observabihty of free Boolean networks by using the semi-tensor product method,and presents some new results.First,the concept of observability for free Boolean networks is proposed,based on which and the algebraic form of Boolean networks,a kind of observabihty matrix is constructed.Second,by the observability matrix,a new necessary and sufficient condition is given for the observability of Boolean networks.Third,the concept of observabihty index for observable Boolean networks is defined,and an algorithm is established to calculate the observability index.Finally,a practical example of D.Melanogaster segmentation polarity gene networks is studied to support our new results.The study of the illustrative example shows that the new results obtained in this paper are very effective in investigating the observability of free Boolean networks.     

Innovating Authentically: Cultural Differentiation in the Animation Sector

Systemic Practice and Action Research - This paper examines the concept of authentic innovation and the development of the animation industry in Malaysia. Authenticity is a concept that has been...