论企业技术创新的评价

讨论了企业技术创新的评价方法，引入事实评价与价值评价标准，对企业技术创新进行技术评价和社会评价。认为只有当企业技术创新的技术评价和社会评价均为可行时，技术创新方案才原则上可以采用。     

新的基团法估算沸点下蒸发焓

提出了估算沸点下蒸发焓的含基团重量分率的基团法和估算式，拟合团贡献值，对３８５种有机物的计算平均偏差约为１．５％。所提出的新方法明显优于３种对应状态和用蒸发熵的基团法。     

非对称度量空间上不动点定理

提出建立在非对称度量空间之间的上收缩映射和下收缩映射的概念.考虑到非对称度量的不对称性,进一步定义了非对称度量空间到自身映射的左不动点和右不动点.最后,给出了非对称度量空间上的两个不动点定理.     

The Frontier Movement and The American Values and Beliefs

This paper briefly accounts the background of American values and beliefs. It analyses the essence of the American ideals and points out that the American values are exaggerated and glamorized by the American upper class. They are in a sense, a dose of anaesthetic and a kind of hypocrisy.     

The Response of Debris-Flow Events to Solar Proton Flares （Ⅰ）

By analyzing the observation data from Dongchuan Debris Flow Observation and Research Station and historical data from year 1965 to 1990 gotten from National Astronomical Ob-servatories/Yunnan Observatory,the responding of debris flow in Jiangjia Ravine to Solar Proton Flare is studied. The following conclusion can be drawn. Solar Proton Flare,as one of most im-portant astronomical factors,affects the activity of debris flow in Yunnan. Generally,from 1965 to1990,the more active Solar Pro-ton Flare is,the greater the probability of high frequency and large runoff of debris flow is. On the contrary,the less active Solar Pro-ton Flare is,the greater the probability of low frequency,small runoff,and low sediment transport of debris flow is.     

A data model for regions with indeterminate boundaries

Most of spatial phenomena like natural vegetation units and land use areas constantly change over time and have uncertainty spatial extents. Till now, a considerable number of data models have been proposed for spatial objects with sharp boundaries as well as with indeterminate boundaries. However, they mainly concern space and time or space and fuzziness and not yet integrate them into a single unified framework. This paper introduces a formal definition of the conceptual fuzzy spatiotemporal data model, called FSTDM for fuzzy regions based on fuzzy set theory. We also contribute a method of manipulating queries with the presence of both temporal predicate and fuzzy spatial predicate in the condition clause efficiently. We then implement a prototype system.Through the experimental results, we prove that our work can be used to build a specialized system such as GIS, spatial database, and so on.     

入世后西部地区如何抑制第二次人才快速外流

加入WTO后，跨国公司和东部企业为争夺人才竞相出台了优惠的政策，导致了西部地区继改革开放之后第二次人才快速外流。西部地区必须从政府宏观和企业微观两个层面着手，采取一系列积极有效的政策措施，来抑制人才的快速外流。     

延迟微分反馈法控制混沌

利用可测变量的微商进行反馈,提出了用延迟微分反馈控制(DDFC:DelayedDifferentialFeedbackControl)实现混沌控制的方法。理论证明了微分反馈控制和DDFC控制Lü系统3个平衡点的稳定可控性。在Matlab进行了数值仿真,结果表明,通过调节延迟时间τ和控制增益k,DDFC系统能自动寻找和稳定不同的不稳定周期轨道(UPO:UnstablePeriodicOrbit),实现混沌控制。     

西藏高山草原土放线菌研究初探

本文采用常规方法研究西藏6个分布于海拔4,240～4,850m 的高山草原土的放线菌数量,对从6个土样中分离纯化所得的454株放线菌中选出具有代表性的84株菌进行分离鉴定。结果表明:西藏同一土类不同土样中放线菌数量差异很大;84株代表性菌可分为9个属,链霉菌属(76.2%)占优势。     

仿真模型中复杂三维实体集的选择与交互技术研究

鉴于目前商用图形软件包对于复杂模型中三维实体集显示与选择的局限性，本文提出了一种新的判断点与面域从属关系的方法，此方法借鉴计算机图形学中扫描转换填充算法的射线法，并在此基础上对射线法进行扩充和完善，文章同时对三维复杂实体群的交互手段和技术进行了研究，在解决实际问题中取得了良好的效果。