Chemistry and Toxicology of Major Bioactive Substances in Inocybe Mushrooms

Mushroom poisoning has always been a threat to human health. There are a large number of reports about ingestion of poisonous mushrooms every year around the world. It attracts the attention of researchers, especially in the aspects of toxin composition, toxic mechanism and toxin application in poisonous mushroom. Inocybe is a large genus of mushrooms and contains toxic substances including muscarine, psilocybin, psilocin, aeruginascin, lectins and baeocystin. In order to prevent and remedy mushroom poisoning, it is significant to clarify the toxic effects and mechanisms of these bioactive substances. In this review article, we summarize the chemistry, most known toxic effects and mechanisms of major toxic substances in Inocybe mushrooms, especially muscarine, psilocybin and psilocin. Their available toxicity data (different species, different administration routes) published formerly are also summarized. In addition, the treatment and medical application of these toxic substances in Inocybe mushrooms are also discussed. We hope that this review will help understanding of the chemistry and toxicology of Inocybe mushrooms as well as the potential clinical application of its bioactive substances to benefit human beings.     

基于改进差分演化算法的无功优化

针对电力网络无功优化问题,增加考虑了电压稳定指标,采用改进的差分演化算法同时对网损和电压稳定指数进行优化.该算法基于一般差分演化算法,在进化的不同阶段对算法参数缩放因子F和杂交概率CR进行自适应调整与控制,增加种群多样性的同时,能够调整搜索方向快速找到最优化方案.应用IEEE 30节点和IEEE 57节点系统进行了测试,结果表明所用算法相比遗传算法和一般差分演化算法,不仅能够有效减少有功网损,还能让PQ负荷节点远离电压崩溃点,并具有计算速度快、鲁棒性好等优点.     

流场动态可视化平台关键技术与应用

流场模拟是计算机仿真模拟的热点和难点,是展现水流动态变化过程、辅助寻求水流运动变化规律的重要手段。流场可视化技术的应用可以有效提高水流信息表达的直观性与综合性。本文以北江航道水流可视化为例,开发了浏览器/服务器结构的航道水流可视化平台,重点研究了平台中基于图像的流场可视化技术,采用渲染到纹理技术和通用图形处理器计算中的乒乓技术实现了流场可视化的融合,采用基于视点动态渲染的方式有效解决了水流细节层次的表现问题。在北江航道水流可视化应用中流场动态显示效果流畅,运行帧率达60帧左右。该流场可视化实现方法可以为网页端流场可视化实现与应用提供参考。     

基于X3D/VRML在线室内装饰设计系统的研究

阐述利用X3D组件的外部原型(EXTERNPROTO)技术、脚本语言支持技术和户界面支持技术等实现基于X3D/VRML的在线室内装饰设计系统;该系统具有三维网页菜单功能,通过鼠标操作,可以方便而快速地完成地板、墙纸以及家具的变换,让用户体现三维装饰效果的快速切换.     

Making scanned Arabic documents machine accessible using an ensemble of SVM classifiers

International Journal on Document Analysis and Recognition (IJDAR) - Raster-image PDF files originating from scanning or photographing paper documents are inaccessible to both text search engines...     

谦比希铜矿主矿体深部保安矿柱稳定性分析

谦比希铜矿深部矿体采用大直径深孔分段空场嗣后废石充填法开采,存在凿岩巷道稳定性差、上盘垮冒严重等问题,导致采场回采效率低、安全性差,制约矿山生产能力,同时上部采用嗣后分级尾砂充填,隔离保安矿柱仅厚21 m。为保证深部嗣后采场的安全回采,选用FLAC3D对保安矿柱的稳定性进行分析研究。结果表明,在当前条件下,21 m保安矿柱能有效隔离上下采区,防止上部充填尾砂涌入下部采场,保证采场作业安全。     

基于LabVIEW的远程γ能谱测量系统的开发

本文讨论了一套基于LabVIEW的远程γ能谱测量系统的设计技术:(1)数据采集及客户端软件编程技术,(2)基于DataSocket的网络通讯技术.利用该系统测量了137Csγ能谱,其性能优于基于Java applet技术的同类系统.     

基于PPTSVD的桥梁移动荷载识别

为了改进时域法(time domain method,简称TDM)识别桥面移动荷载时存在的识别精度受测量噪声、响应类型及数量影响较大等缺陷,在截断奇异值分解(truncated singular value decomposition,简称TSVD)的基础上,提出了基于分段多项式截断奇异值分解(piecewise polynomial truncated singular value decomposition,简称PPTSVD)识别桥梁移动荷载。采用简化欧拉梁模型,由反演车辆荷载作用下桥梁的弯矩响应和加速度响应识别桥面移动荷载,得到了不同噪声水平下TDM,TSVD与PPTSVD的识别结果。研究结果表明,与采用奇异值分解(singular value decomposition,简称SVD)进行常规降噪的TDM相比,采用TSVD识别移动荷载在识别精度和抗噪性能方面均有一定提高,且由TSVD改进的PPTSVD识别方法较前两种方法具有更加明显的优势;PPTSVD识别精度高、识别结果受响应类型及响应组合影响较小且具有良好的鲁棒性,更适用于桥梁移动荷载的现场识别。