对校园网络安全的研究

大学校园网具有业务覆盖范围大，信息庞大的特点，系统一旦出现问题后果不堪设想，损失无法估量。因此。校园内要求系统的稳定性、安全性、可靠性非常高。而现在的大多数校园网都与互联网建立了联接。来自互联网上的网络病毒以及校园网络内外的黑客攻击已成为网络安全的重大隐患。建立一套切实可行的校园网络安全保护措施，使校园网能够安全稳定地运行．已成为各大校园网管理者迫在眉睫的任务。     

上臂假肢的智能控制

上臂假肢系统是一个复杂的人一机系统。本文讨论了上臂假肢及其控制的特点。提出了以伺服级、协调级、组织级构成的三级上臂假肢智能控制系统。仿真实验研究表明，该系统能实现预期的功能，减轻了截肢者的智力负担。     

引入Petri网概念的可视编程系统的设计

引进Ｐｅｔｒｉ网概念刻划图标（Ｉｃｏｎ）的动态行为和相互作用并给出一个可视化编程系统．通过例子说明本系统在编程阶段和程序运行阶段所采用的可视化技术     

硬边孔径动态散斑的时空交叉相关特性研究

用统计光学的方法，推导了硬边孔径动态散斑场的时空交叉相关函数，并讨论了散斑的平移规律和“沸滕”现象。Q     

氮磷钾配施对黑龙江西部半干旱地区大豆产量及效益的影响研究

在黑龙江省甘南县兴隆乡东兴村,进行了不同氮、磷、钾肥配比对大豆产量影响的研究。利用单因素分析法分析了氮、磷、钾对大豆产量的影响程度。并利用回归分析方法拟和了产量与氮、磷、钾肥之间的回归方程。图3,表5,参11。     

Molecular basis of photoprotection and control of photosynthetic light-harvesting

In order to maximize their use of light energy in photosynthesis, plants have molecules that act as light-harvesting antennae, which collect light quanta and deliver them to the reaction centres, where energy conversion into a chemical form takes place. The functioning of the antenna responds to the extreme changes in the intensity of sunlight encountered in nature. In shade, light is efficiently harvested in photosynthesis. However, in full sunlight, much of the energy absorbed is not needed and there are vitally important switches to specific antenna states, which safely dissipate the excess energy as heat. This is essential for plant survival, because it provides protection against the potential photo-damage of the photosynthetic membrane. But whereas the features that establish high photosynthetic efficiency have been highlighted, almost nothing is known about the molecular nature of the dissipative states. Recently, the atomic structure of the major plant light-harvesting antenna protein, LHCII, has been determined by X-ray crystallography. Here we demonstrate that this is the structure of a dissipative state of LHCII. We present a spectroscopic analysis of this crystal form, and identify the specific changes in configuration of its pigment population that give LHCII the intrinsic capability to regulate energy flow. This provides a molecular basis for understanding the control of photosynthetic light-harvesting.     

絮凝剂在高岭土漂白洗涤中的应用研究

分析高岭土选矿中难洗涤的原因。导出了多级间歇洗涤模型,提出了解决问题的办法,使漂白洗涤过程得到强化,缩短了漂洗时间,降低了用水量。     

Designed polymeric conjugation motivates tunable activation of molecular oxygen in heterogeneous organic photosynthesis

Photocatalytic oxidative organic reactions are important synthetic transformations,and research on reac-tion selectivity by reactive oxygen species (ROS) is sig...     

基于Lyapunov理论的运营期地铁隧道沉降稳定性分析

针对运营期地铁隧道沉降稳定性分析中存在的不足,在Lyapunov理论的基础上,利用主成分分析法,选取地铁隧道沉降的主要影响因素作为地铁隧道沉降系统的状态变量,通过数据反演的方法构建地铁隧道沉降系统的动力学模型,并给出地铁隧道沉降稳定性分析判据。实例计算结果表明,基于Lyapunov理论的运营期地铁隧道沉降稳定性分析方法是合理且可行的,可为类似工程提供参考。