面向新世纪的高校学籍管理

新世纪的中国高等教育正向大众化阶段迈进 ,招生规模的扩大和人才培养模式的转变促进了高校学籍管理的深化改革。新世纪的高校学籍管理应进一步体现宽进严出的管理原则 ,加快学分制学籍管理制度的推进速度 ,实施灵活、激励的运行机制 ,提高学籍管理的科学化程度 ,努力营造良好、宽松、开放的学习氛围 ,培养学生成为新世纪所需要的素质优化的创新人才     

逃离性暴力:一个变迁中的难民体制的“创伤政治”——荷兰庇护程序对强暴幸存者的医疗处理

那些在最近的武装冲突中经历过并逃离有系统的强暴(及其他形式的性暴力)并向荷兰政府申请庇护的妇女与女孩在提出其庇护请求后并没有获得任何必要的医疗与心理救助。一般而言,难民们并没有被充分地告知庇护程序的内容。裁定难民身份的面谈(“详尽倾听”,Furtherhearings)的重要性尤其没有被明确告知。很少有难民知道这一面谈是他们能够解释其逃离理由的唯一时间和地点。此外,那些执行“详尽倾听”的移民与归化署的面试官往往是如此的执著于辨别“伪”难民以至于他们将妇女们的悲痛视为怀疑其可信性的良好理由。因此,在涉及强暴的难民身份面谈中,女性难民常常受到苛刻的对待。那些严重人权侵害的幸存者们在求助于荷兰的“创伤政策”时则遇到了更大的困难。这一法律工具所用的创伤概念使得它不足以对政治暴力幸存者提供保护。     

球面中平行平均曲率曲面的整体刚性定理

使用 P.Li的 Sobolev不等式和 Lp估计方法 ,建立了球面中曲面的整体刚性定理 .假设 M是标准球面 Sp + 2 (p≥ 1 )中亏格为零的一个紧致曲面 ,且 M具有平行的平均曲率向量和正的高斯曲率 ,于是存在一个仅依赖高斯曲率的正下界和平均曲率的常数 A,当 M的第二基本形式长度的平方的 L2 模小于 A时 ,M必为小球面 .     

Deconvolution techniques for characterizing indoor UWB wireless channel

A deconvolution algorithm is proposed to account for the distortions of impulse shape introduced by propagation process. By finding the best correlation of the received waveform with the multiple templates, the number of multipath components is reduced as the result of eliminating the ＂phantom paths＂, and the captured energy increases. Moreover, it needs only a single reference measurement in real measurement environment （do not need the anechoic chamber）, which by far simplifies the templates acquiring procedure.     

Design of control sequence of pulses for the population transfer of high dimensional spin 1/2 quantum systems

On the basis of the relationship between the Hamiltonian of spin 1/2 quantum system under control and the energy level structure and transitions, a radio frequency pulse sequence is designed using intuitive and half counter-intuitive sequences of pulse to transfer the population of the 3-qubit system coherently. The effectiveness of the designed control sequence is verified through the system simulation experiment of the evolution of state. In principle, the design method of the control pulse sequence proposed can be generalized to use in the quantum systems of higher dimension.     

面向飞机PHM的大数据分析与人工智能应用

针对新一代电子产品密集型的飞机,其系统结构和失效机理复杂、失效模式多样,传统的方法难以对其进行有效健康管理的现状,因此提出了基于海量数据挖掘的飞机PHM研究。首先从系统结构、服役环境、数据来源与存储方式等角度分析了新一代飞机对海量数据挖掘的应用需求;其次论述了基于海量数据挖掘的关键技术,包括数据的预处理、集成管理、聚类、分类、关联、预测等;最后提出了一种基于私有云的飞机PHM海量数据挖掘平台,详细阐述了该平台的总体框架和软硬件结构,该平台为飞机PHM提供了验证平台,对促进飞机PHM的集成与工程化实现具有重大的军事应用意义。     

Simplified calculation of UWB signal transmitting through a finitely conducting slab

A simplified closed-form analytic solution for UWB impulse signal transmitting through a finitely conducting slab is proposed. The approach first requires evaluating the impulse response of the slab and then convolving it with the specified incident field waveform. To obtain the impulsive transmitting field, either for vertical or horizontal polarization, approximations to the refraction coefficients and propagation loss are made, which can be proved to be accurate enough, comparing with their frequency domain solutions. Thereby, it permits simplified closed-form expressions in the time domain for both terms. The resulting transient response for the transmitting impulse field is then given by convolution of the time domMn refraction coefficients and time domain propagation loss. A numerical example of an incident monocyele transmitting through a slab using this technique, is presented, to illustrate the effective use of the method.     

Application of multi-resolution analysis in sonar image denoising

Sonar images have complex background, low contrast, and deteriorative edges; these characteristics make it difficult for researchers to dispose the sonar objects. The multi-resolution analysis represents the signals in different scales efficiently, which is widely used in image processing. Wavelets are successful in disposing point discontinuities in one dimension, but not in two dimensions. The finite Ridgelet transform （FRIT） deals efficiently with the singularity in high dimension. It presents three improved denoising approaches, which are based on FRIT and used in the sonar image disposal technique. By experiment and comparison with traditional methods, these approaches not only suppress the artifacts, but also obtain good effect in edge keeping and SNR of the sonar image denoising.     

基于加权全局时频特征的易混淆词识别

针对易混淆词特征差异小,分类决策困难的特点,提出了一种新的语音识别特征。该特征可以根据待识单词的发音特点,通过选用合适的基函数及加权处理,突出混淆词特征之间的差异性;     

耐水脱硫石膏、粉煤灰胶结材的研究

本文较深入地研究了脱硫石膏粉煤灰化学成分、杂质、颗粒特征和激发剂等对脱硫石膏、粉煤灰胶结材性能的影响 研究表明 ,激发剂是影响脱硫石膏、粉煤灰胶结材性能的主要因素 这为脱硫石膏、粉煤灰资源化利用打下良好理论基础 经实际应用表明 ,研究结果与实际情况能很好相符