加速器驱动次临界系统发展态势分析

该文聚焦加速器驱动次临界系统的相关研究,利用ISI Web of Knowledge 数据库中收录的加速器驱动次临界系统相关的研究论文作为分析对象,分析了时间、主题、国家和机构等分布特征及国际合作情况,并结合定性资料的调研,表明2000年来,加速器驱动次临界系统的相关研究日趋活跃,美国、日本、德国、法国和俄罗斯5个国家...     

Charting a course for genomic medicine from base pairs to bedside

There has been much progress in genomics in the ten years since a draft sequence of the human genome was published. Opportunities for understanding health and disease are now unprecedented, as advances in genomics are harnessed to obtain robust foundational knowledge about the structure and function of the human genome and about the genetic contributions to human health and disease. Here we articulate a 2011 vision for the future of genomics research and describe the path towards an era of genomic medicine.     

基于分形特征的图像分割

本文主要研究分数维理论在图像特征提取上的应用,在分析了盒子维数的基本思想和算法的基础上,提取能够较好反映灰度图像纹理细节和结构信息的新的分形特征参量用于图像的分割。在图像分割中,采用基于图像模块的分形特征提取方法,利用特征点在特征空间中的分布对图像进行分割,通过上机实验得出的图像分割的结果表明该种方法是让人满意的。     

周期扰动非线性耦合器中的混浊态

借助于Ｐｏｉｎｃａｒｅ图作为测量的基准，该文示出了周期扰动非线性耦合器中湿浊态的存在性。基于周期波导中周期模的耦合原理，文中进一步讨论了混浊态在周期扰动非线性耦合器中起始的机理。     

信息服务中计费问题的探讨

信息服务业在我国已初具规模,作为一种产业,它有自身的经济规律.本文首先分析了信息服务系统中各种计费模式,然后对计费的工作流程、计费系统的结构以及计费与外界的接口分别作了详细探讨.     

产生腐败的理论分析

防止腐败的发生，不仅应从非正式制度着眼，更应从经济人的有限理性出发，注意正式制度(福利、晋升、奖惩、监督等)的完善。     

Direct observation of the clockwise light-driven rotation of F_0F_(1-)ATP synthase complex

The purified thermophilic bacterium PS3 F1βP10×His-tag is inserted into the F0F1-ATP synthases of chro matophores isolated from photosynthetic bacteria Rhodo spirillum rubrum. The studies of biochemical properties of the hybrid chromatophores show that they have both protons-driving capability and photophosphorylation. The fluorescent actin filaments, as a marker of its orientation by video-microscopic experiment, are connected via Maleimido C3-NTA to the reconstituted β10×His-tag of F0F1-ATP synthases. The clockwise rotation of F0F1-ATP synthases driven by light is observed directly when viewed from the F0 side to F1- This system should be valuable for further studying the coupling property of F0F1-ATP synthase.     

WPAN系统容量分析及改善

对采用跳频扩频方案的无线个域网标准的系统容量进行了分析，在此基础上，提出了采用包长度自适应控制技术来提高系统容量的方法，并以跳频扩频的蓝牙系统为例，分析了蓝牙ACL包和SCO包采用自适应包长度控制技术与固定包长度传输时的系统容量变化。仿真结果表明，采用该方法能够有效地改进系统的容量性能。     

仿真结果实时图形显示与事后分析,处理系统

可视化计算已成为仿真技术的一个发展方向。本文给出了一个仿真结果可视化处理实例，讨论了系统的硬件构成及软件开发环境，介绍了该系统的主要功能及特点。     

Research on Intelligent Control of Roving Frame

A new model of roving frame FA467, which uses four frequency inverters to replace the complex mechanical transmission, is discussed. A Neuron-PID is designed to reduce the effect of various parametric variations such as load inertia. To ensure the constant spinning tension all over the spinning process, a feedforward controller using iterative learning control algorithm is desigend to avoid disturbances caused by changes of temperature, humidity and so on. The simulation result is shown to illustrate the effectiveness of the proposed algorithm, and now the roving frame FA467 has been developed successfully.