论《集结号》对当代中国电影的意义

《集结号》的成功上演,对处于困境之中的当代中国电影具有重要的意义,其中的人文关怀与人道主义．对战争状态下人性的思考,对入的生命价值的尊重,在电影主流文化价值与国家意识形态、大众文化与精英文化之间形成良性互动,以及国际电影主流文化价值与民族本土文化价值的契合,使冯小刚的电影展现了一个全新视景,也是冯小刚对中国电影国际化进程的一次成功探索与尝试,预示了中国电影新的文化诉求,给处于困境中的中国电影的突围之路提供了新的可能性。     

面向移动目标的WSN单个检测模式覆盖问题

基于能量暴露模型,分析了环境噪声、传感器和被测移动目标物理参数节点检测半径的影响,提出了一种大规模无线传感器网络(WSN)在二维平面上节点归一化密度的三角形分析模型(TAM).以检测概率为覆盖性能评价指标,采用归一化分析方法,用TAM分析了归一化路径长度小于1时归一化密度与单个检测模式的检测概率关系,得到了最坏情况下节点归一化临界密度上限.仿真实验结果表明归一化临界密度可较为准确地由检测概率和归一化路径长度确定,可为大规模无线传感器网络的传感器参数选择和部署提供参考.     

关于拉格朗日中值定理的证明

拉格朗日中值定理是微分学中一个应用广泛的重要定理,针对罗尔定理证明拉格朗日中值定理的问题,从几何意义及坐标系转换等方面分析了构造辅助函数的思路及方法。拓宽了中值定理证明的思路。     

圆分布双跳无线传感器网络配置及拓扑发现修复算法与仿真

指出了无线传感器网络在从战场到环境监测的许多领域都表现得越来越重要,给出了一类圆分布双跳无线传感器网络,并提出其安全性要求和模型．对于其面临的威胁,在权衡网络资源局限性的基础上,提出了相应解决方案,包括拓扑发现算法、网络配置协议和网络修复算法（TDNSR）。仿真结果表明：和SPIN算法相比,TDNSR能迅速实现网络拓扑发现和配置并修复,能有效减少资源开销。     

Fabric Defect Detection Technique Based on Two-double Neural Network

This paper introduces the identification of the defects on the fabric by using two-double neural network and wavelet analysis. The purpose is to fit for the automatic cloth inspection system and to avoid the disadvantages of traditional human inspection. Firstly, training the normal fabric to acquire its characteristics and then using the BP neural network to tell the normal fabric apart from the one with defects. Secondly, doing the two-dimeusional discrete wavelet transformation based on the image of the defects, then wiping off the proper characteristics of the fabric, and identifying the defects utilizing the trained BP neural network. It is proved that this method is of high speed and accuracy. It comes up to the requirement of automatic cloth inspection.     

特定竞赛图中的最长圈问题

若有向图T满足条件:uv(≠)A(T)使得dT (u) dr-(v)≥k,则称图T满足O(k)条件.讨论了有向图及特殊有向图的最长圈,并且给出了某些特殊竞赛图的Hamilton圈的存在条件.     

啤酒酵母泥中蛋白质的提取

从啤酒酵母泥中提取有益物质,不仅可以提高啤酒厂的经济效益,而且降低啤酒废酵母的污染负荷。研究了啤酒酵母蛋白的提取工艺。确定了主要工艺路线。实验中采用1mol／L的Tween20作为表面活性剂和180分钟的超声破碎,啤酒酵母细胞的破壁率达到了68．67％,提取物酵母蛋白的产率为0．106mg／mL。     

Visualizing transient events in amino-terminal autoprocessing of HIV-1 protease

HIV-1 protease processes the Gag and Gag-Pol polyproteins into mature structural and functional proteins, including itself, and is therefore indispensable for viral maturation. The mature protease is active only as a dimer with each subunit contributing catalytic residues. The full-length transframe region protease precursor appears to be monomeric yet undergoes maturation via intramolecular cleavage of a putative precursor dimer, concomitant with the appearance of mature-like catalytic activity. How such intramolecular cleavage can occur when the amino and carboxy termini of the mature protease are part of an intersubunit beta-sheet located distal from the active site is unclear. Here we visualize the early events in N-terminal autoprocessing using an inactive mini-precursor with a four-residue N-terminal extension that mimics the transframe region protease precursor. Using paramagnetic relaxation enhancement, a technique that is exquisitely sensitive to the presence of minor species, we show that the mini-precursor forms highly transient, lowly populated (3-5%) dimeric encounter complexes that involve the mature dimer interface but occupy a wide range of subunit orientations relative to the mature dimer. Furthermore, the occupancy of the mature dimer configuration constitutes a very small fraction of the self-associated species (accounting for the very low enzymatic activity of the protease precursor), and the N-terminal extension makes transient intra- and intersubunit contacts with the substrate binding site and is therefore available for autocleavage when the correct dimer orientation is sampled within the encounter complex ensemble.     

电大开放教育教师角色转换引导和激励探析

电大的性质和任务不同于传统的高等学校,其教学管理呈现出与传统高校不一样的特征。基于这种特征的认识,电大教师应定位于激发学生创造力的角色、授人与渔的角色、技能导师的角色等。而营造良好师生关系、调整评价和激励机制等则可引导和激励教师顺利实现这种角色定位。     

隐喻理论与大学英语词汇及阅读教学

根据认知语义学的隐喻理论,语言中词义的延伸主要通过隐喻等认知思维方式实现。运用隐喻理论进行大学英语词汇及阅读理解教学,可降低记忆词汇的繁重度,提升学生阅读理解能力,让学生了解中国与英语国家在语言文化上的共性及差异性,培养学生的跨文化思维意识。