一般动力学系统在相空间的Noether定理及其逆定理

根据一般动力学系统在相空间的作用积分在无穷小群变换下的变换性质,分别建立起完整和非完整非保守系统的Noether定理和逆定理.由给出的例子表明,在相空间中可以呈现出动力学系统新的对称性.     

AN ALGORITHM FOR CHOOSING THE SAMPLING TIMES FOR AN EXPERIMENT ON A CONTINUOUS PROCESS

Saunders & Eccleston (1992) and Saunders, Eccleston & Spessa (1992) developed an approach to the design of factorial experiments on continuous processes that allows for the correlation present in such processes. Their methods concentrated on identifying the order of application of treatments in such experiments, assuming that the spacing between experiments is constant. On a continuous process, there is no necessity to maintain equally spaced sampling times. This paper gives an algorithm for choosing the optimal sampling times for a factorial experiment aimed at estimating a particular parameter or set of parameters. It is shown that in practical situations the optimal sampling times give considerable improvements in the accuracy of the parameter estimates.     

徽州古村落景观意象及其在现代景观设计中的运用研究

通过探讨徽州古村落中的景观意象及其在现代景观设计中的运用,阐述景观意象的概念,徽州古村落的整体景观意象、局部景观意象等,其中局部景观意象包括村落八景景观意象、水口园林景观意象、池塘景观意象、村落"点景"景观意象以及其它景观片段的意象特征,并对其在现代景观设计中的运用进行了探讨。为安徽地域景观设计中的"地域文化特征"提供参照,对相似的地域景观文化的继承与发展起抛砖引玉的作用。     

《绝望中诞生》与朱苏进创作转型

论述了《绝望中诞生》不仅是一篇军事题材小说,更是一篇优秀的科幻小说,具有鲜明的科学性和幻想性。指出它对自我空间位置的发现、军事创作题材的拓展有着独特的贡献,预示着朱苏进创作转型的开始。     

景观设计中的象征阐释研究

景观承载着丰富的象征意义,同时,人们在欣赏景观时,也会通过自己的象征阐释拓展景观的内涵。人们的这种象征阐释源于象征化生存的人类本能,其心理基础是期待视野。象征阐释一般具有分为重构和建构两种类型,具有必然性、主动性、普泛性、差异性、动态性、自由性、多样性、通俗性、丰富性、不定性、可引导性等特征。对于象征阐释,景观设计者应在建构意义、语境指引、顺应读者等方面强化设计,才能有效地把读者的象征阐释指向预期的景观内涵。     

Theory of optimal blocking of nonregular factorial designs

The authors introduce the notion of split generalized wordlength pattern (GWP), i.e., treatment GWP and block GWP, for a blocked nonregular factorial design. They generalize the minimum aberration criterion to suit this type of design. Connections between factorial design theory and coding theory allow them to obtain combinatorial identities that govern the relationship between the split GWP of a blocked factorial design and that of its blocked consulting design. These identities work for regular and nonregular designs. Furthermore, the authors establish general rules for identifying generalized minimum aberration (GMA) blocked designs through their blocked consulting designs. Finally they tabulate and compare some GMA blocked designs from Hall's orthogonal array OA(16,2¹5,2) of type III.     

Sequential Procedure For Fixed Accuracy Estimation of the Population Size in Recapture Sampling

A sequential procedure is constructed to provide a fixed‐accuracy estimator for the number of faults in a system. This paper focuses on the case when faults are homogeneous. However, the method can be adapted to other models by choosing a more robust estimator. The accuracy of the estimator depends on the failure intensity, the length of testing period and the total number of faults in the system. Simulations illustrate the performance of the proposed procedure. The method is applied to an information system failure dataset.     

艺术与数字技术相结合的新媒体艺术设计

新媒体艺术设计是信息技术快速发展和艺术相结合的产物,对其形式特征、美学理论和知识结构的研究是这个学科发展的重要环节。为了解决新媒体艺术设计面临的学科基础理论薄弱,产业发展瓶颈等问题,通过调研相关产业,分析最新的前沿研究成果,并结合长期实践,得出新媒体艺术设计只有解决好学科的传承与创新,以及人才的培养平台才能得到高效快速的发展。     

MUX級联网络的組合設計

利用MUX级联网络实现多变量逻辑函数时,为求得最简的级联系统,本文提出了利用剩余函数立方图求取变量划分的快速方法。该法无需借助卡诺图,也不需要进行复杂的运算。结果表明,该法行之有效而且十分方便。     

CAD在位置量规设计中的应用

本文介绍了位置量规设计原理及计算公式，陈述了位置量计算机辅助设计系统的总体设计及软、硬件构成，同时介绍了为加快绘图速度对图形输入板菜单进行重新编制的方法。