基于Moodle的网络教学模式构建与使用

本文介绍一种功能强大、开源免费的学习管理系统(LMS)- -Moodle,阐述了利用该系统的功能模块进行课程设计的方法和构建网络教学模式的流程,并提出了这种教学模式在实际使用过程中的建议.     

RISP: a web-based server for prediction of RNA-binding sites in proteins

Protein-RNA interactions play significant roles in a number of biological activities, such as protein synthesis, regulation of gene expression. Here we propose a hybrid RISP (RNA-interaction site prediction) method, using support vector machine (SVM) in conjunction with evolutionary information of amino acid sequences in terms of their position-specific scoring matrices (PSSMs) for prediction of RNA-binding sites. The results show that our RISP method has 72.2% net prediction (NP) (61.0% sensitivity and 83.3% specificity). When compared with previous studies, this novel method appears more accurate and better generalization abilities. RISP is freely available at http://grc.seu.edu.cn/RISP. Given a protein sequence, RISP decides whether residue in the protein is RNA-binding or not (optimal prediction), and gives the confidence value, 'high specificity' prediction and 'high sensitivity' prediction.     

Simultaneous measurement of temperature and strain with long period grating pairs using low resolution detection

An investigation showing the performance of compact long period grating (LPG) pairs under demanding experimental conditions, making comparisons with the use of single LPGs for the simultaneous measurement of strain and temperature is presented. In this work, a LPG pair (LPGP) sensor comprising two weak (2.5 dB each) LPGs, 13 mm apart, was compared against the performance of two single LPG sensors (LPG1 & LPG2) with coupling strengths of 2.5 dB and 12.5 dB, respectively. All the LPG sensors used were subjected to extreme conditions arising from the fabrication, by choosing a high amplitude mask period with short physical length LPGs, and the high temperature annealing processes. In addition, a low resolution detection instrument was used to capture the spectra under study. Results have shown that the LPGP is 40 times better than the first single LPG used (LPG1) and three times better than the second LPG (LPG2). Using the error analysis methodology of Brady et al., the temperature and strain errors due to the uncertainty of the wavelength measurement for each of the LPG1, LPG2, and LPGP were compared with the typical performance of various fibre Bragg grating (FBG)-based sensor schemes under similar testing conditions. It was found that LPGPs offer the best performance especially when using low resolution detection instrumentation.     

Electrical response of Sm2O3-doped SnO2 to C2H2 and effect of humidity interference

Pure and Sm₂O₃-doped SnO₂ are prepared through a sol–gel method and characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM). The sensor based on 6 wt% Sm₂O₃-doped SnO₂ displays superior response at an operating temperature of 180 °C, and the response magnitude to 1000 ppm C₂H₂ can reach 63.8, which is 16.8 times larger than that of pure SnO₂. This sensor also shows high sensitivity under various humidity conditions. These results make our product be a good candidate in fabricating C₂H₂ sensors.     

基于Petri网的软件演化过程

随着遗产软件系统的老化,软件演化已成为软件工程的一个新兴领域.对软件演化及过程的特征进行了描述,提出基于Petri网的软件演化过程;最后给出了软件演化过程的活性判断及优化算法.     

G.726语音压缩算法在低码率下的改进与实现

G.726协议制定的ADPCM音频压缩算法在语音数字通信领域应用广泛.通过对G.726算法流程的分析,提出了一种改进算法编码器的方案,并通过编程与测试,证明了此改进方法的可行性,该方案可提高G.726算法在低码率下的语音还原质量.     

面向世博场馆的移动智能监控系统研究与实现

随着社会的发展,移动智能监控已经成为客观趋势.针对上海市世界博览会场馆监控这个应用场景,研究面向世博场馆的移动智能监控系统的关键技术,解决了移动交互监控、运动目标跟踪两个难题,并最终实现了移动智能监控系统软件.经过测试,该移动智能监控系统在监控精确度和灵敏度方面均表现良好.     

网关机顶盒——下一代数字家庭网关的研究

提出一种用更智能化的机顶盒来实现家庭网关的方案,降低了资源消耗并提供高质量服务.基于ARM处理器加DSP的体系架构,配置嵌入式Linux和中间件消除家庭网络设备间的差异性,设计了丰富的顶层应用软件.并命名这种具有网关功能的智能性机顶盒为网关机顶盒.     

基于AgentX协议ForCES路由器网管代理方案的研究与实现

采用控制件CE（Control Element）与转发件FE（Forwarding Element）分离的ForCES路由器,这在路由器体系结构的设计上与传统路由器比较是一种突破性的创举,如何对其实施有效的网络管理是当前研究的热点之一。针对ForCES路由器体系结构特点,在分析SNMP代理实现难点的基础上,结合工程实践,提出并具体实现了一种新的网管代理方案。实践证明,该基于AgentX协议的方案,以可扩展方式实现了网络管理的功能,能较好地满足ForCES路由器可扩展性要求。     

基于混合瑞利分布的三维医学图像分割算法

水平集算法是当前比较重要的分割算法,研究该算法的三维分割技术.提出高斯分布和瑞利分布相结合的方法进行概率密度函数的确定与分析,通过随机极大似然算法(SEM)把瑞利分布引入到水平集三维分割演化模型中.该方法成功应用于多种医学组织的三维分割,提高了分割速度和分割效果,减少了参数的设置.