人生盛宴中的乔伊斯--对《憾事一桩》中达菲先生的原型分析

爱尔兰文学巨匠乔伊斯的《都柏林人》是对爱尔兰昏昏噩噩的群体精神文化现状的真实写照。乔伊斯在无意识的创作过程中深入地剖析了爱尔兰国民文化的劣根性,同时也对自己的精神和心理进行了解构与分析。《憾事一桩》中的主人公达菲先生就是乔伊斯无意识的化身,是乔伊斯力求拯救的业已陷入精神沦陷危机边缘的那部分自我。文章从分析心理学角度分析达菲先生的精神并建构达菲先生的心理原型,力求呈现乔伊斯在无意识的创作过程中的动态的心理图景。     

基于多线程通讯服务模型的交通诱导系统设计

提出并描述了多线程通讯服务模型的设计和实现方法,该模型充分利用面向对象理论将交通诱导系统中嵌入式外场设备、通讯服务中心与监控客户端和他们之间的通讯过程分别进行了模型抽象和系统实现。对比之前的监控机单点监控模型,能够更好的解决多监控机在多网络连接内与多类型外场设备的实时通讯控制问题。同时,相对于单线程和双线程通讯模型,通过系统运行测试,该多线程模型有效的解决了由于个别通讯故障引发的整体系统轮询等待滞后问题,缩短了整个轮询和控制通讯周期。     

动态分层二值进化全关节驱动跟踪贫化算法

在人体运动跟踪建模中,需要对样本集的多样性特征进行贫化处理,以提高全关节驱动模式运动状态跟踪的准确性。传统方法采用量子进化和粒子滤波算法进行人体运动跟踪贫化算法实现,算法在全关节多样化样本特征运动模式下,跟踪效果不好。提出一种采用动态分层二值进化处理的改进的量子进化粒子滤波全关节驱动模式跟踪方法,解决多样本特征的贫化问题。进行人体全关节驱动模式动力学分析及人体运动跟踪模型构建,通过动态分层处理技术,获得二值前景图像,求得人体关节的全方位信息特征,通过动态分层二值进化方法,准确地找到各关节位置,构建亮度模型函数,实现贫化处理。实验表明,改进算法能实现对体操运动员运动幅度大的肘、腕、踝部位均得到了准确的跟踪结果,贫化效果较好,运动状态估计精度较高。     

The construction of an interfacial valve-based microfluidic chip for thermotaxis evaluation of human sperm

Thermotaxis has been demonstrated to be an important criterion for sperm evaluation, yet clinical assessment of thermotaxis capacity is currently lacking. In this article, the on-chip thermotaxis evaluation of human sperm is presented for the first time using an interfacial valve-facilitated microfluidic device. The temperature gradient was established and accurately controlled by an external temperature gradient control system. The temperature gradient responsive sperm population was enriched into one of the branch channels with higher temperature setting and the non-responsive ones were evenly distributed into the two branch channels. We employed air-liquid interfacial valves to ensure stable isolation of the two branches, facilitating convenient manipulation of the entrapped sperm. With this device, thermotactic responses were observed in 5.7%-10.6% of the motile sperm moving through four temperature ranges (34.0-35.3 °C, 35.0-36.3 °C, 36.0-37.3 °C, and 37.0-38.3 °C, respectively). In conclusion, we have developed a new method for high throughput clinical evaluation of sperm thermotaxis and this method may allow other researchers to derive better IVF procedure.     

Solution pH change in non-uniform alternating current electric fields at frequencies above the electrode charging frequency

AC Faradaic reactions have been reported as a mechanism inducing non-ideal phenomena such as flow reversal and cell deformation in electrokinetic microfluidic systems. Prior published work described experiments in parallel electrode arrays below the electrode charging frequency (f_c), the frequency for electrical double layer charging at the electrode. However, 2D spatially non-uniform AC electric fields are required for applications such as in plane AC electroosmosis, AC electrothermal pumps, and dielectrophoresis. Many microscale experimental applications utilize AC frequencies around or above f_c. In this work, a pH sensitive fluorescein sodium salt dye was used to detect [H⁺] as an indicator of Faradaic reactions in aqueous solutions within non-uniform AC electric fields. Comparison experiments with (a) parallel (2D uniform fields) electrodes and (b) organic media were employed to deduce the electrode charging mechanism at 5 kHz (1.5f_c). Time dependency analysis illustrated that Faradaic reactions exist above the theoretically predicted electrode charging frequency. Spatial analysis showed [H⁺] varied spatially due to electric field non-uniformities and local pH changed at length scales greater than 50 μm away from the electrode surface. Thus, non-uniform AC fields yielded spatially varied pH gradients as a direct consequence of ion path length differences while uniform fields did not yield pH gradients; the latter is consistent with prior published data. Frequency dependence was examined from 5 kHz to 12 kHz at 5.5 V_pp potential, and voltage dependency was explored from 3.5 to 7.5 V_pp at 5 kHz. Results suggest that Faradaic reactions can still proceed within electrochemical systems in the absence of well-established electrical double layers. This work also illustrates that in microfluidic systems, spatial medium variations must be considered as a function of experiment time, initial medium conditions, electric signal potential, frequency, and spatial position.     

浅析高校服务型学生干部队伍建设的路径

加强高校学生干部队伍建设是强化大学生思想政治教育的需要,是促进学校健康发展的需要。本文主要通过分析高校服务型学生干部队伍的重要作用、新形势下存在的问题,探讨出高校服务型学生干部队伍建设的方法,期望能够总结出一些学生干部队伍建设的新思路和创新路径。     

环境约束下产品组合决策方法探析

面对有限资源，企业如何在环境约束条件下尽可能减少污染、增加利润，寻求产品组合的优化，是企业环境管理中需要解决的问题。既定环境约束下产品组合决策的评价方法目前主要有两种，作业成本计算法（ＡＢＣ）与约束理论（ＴＯＣ）方法。这两种方法在基本假设、关注点以及约束等方面都存在着显著的差别。案例分析表明，ＴＯＣ方法所确定的产品组合排序，能够进一步增加利润，改善环境的效果更为持续，因而相对于ＡＢＣ方法而言，是一种更优的方法。     

顾坤伯、孔仲起两位画师力作:《修海塘》

今年11月25日,中国美术学院将举办顾坤伯教授诞辰100周年画展及座谈会,纪念这位卓越的美术教育家、中国山水画一代宗师。顾坤伯1905年生于无锡,21岁在上海美专毕业后留校任教,1957年经王个移、诸乐三、朱金楼推荐,由潘天寿院长特聘到浙江美术学院(今中国美术学院)执教。他以深厚的基本功和对传统的深入理解,逐渐形成了清雅俊逸的风格和高超的笔墨技法,堪为画坛风范。这幅画,是顾坤伯先生与其入室弟子孔仲起1958年的合作。画面生动,韵味悠长,风貌极具时代特征。此画曾一度流失,后孔仲起教授设法以大画换回,珍藏于室,日前展示给笔者激赏,相互…     

对体育科技期刊青年编辑知识结构现状及影响因素的探讨

本文通过文献资料、调查统计等研究方法,探析了我国体育科技期刊青年编辑的知识结构现状及影响因素,并就其知识结构的构建要素,从实际需求和理论依据上进行论述。     

QFD在机械类高素质应用创新型人才培养中的应用

本文将质量功能配置(QFD)原理成功运用在高等院校机械类高素质应用创新人才培养过程中.以重庆大学机械设计制造及其自动化专业人才培养体系为研究对象,以学生和企业需求为出发点,利用QFD瀑布式分解模型,对教学设计(规划)、教学运行、教学控制等阶段进行质量功能配置,构建人才培养质量屋,规划专业培养方案,取得可喜的成果.本文还...