新诗的求"真"与求"诚"——废名新诗理论阐释

在废名的诗论中,新诗质体现为“当下性”和“诗的情绪”,由此衍生出新诗的“切实”、“质直”以及见之“性情”。这与废名所倡导的“文艺复兴”有着内在一致性。而这些正暗合了新诗的“真”、“诚”要求,并且这一要求逐渐鲜明地呈现出来。     

桑干河断陷构造特征及含油气远景

桑干河断陷位于汾渭地堑北部,大同煤盆地的东侧.做为一个新生代伸展盆地,人们对其进行的油气勘探不多,且前期油气显示不佳.但是随时间的变迁,油气成生理论有了较大的发展,因此有必要结合现代油气成生理论对桑干河断陷的含油气性重新做出分析与评估.本文应用现代构造学理论、结合地震勘探及区域地质资料,对桑干河断陷进行了较精细的构造解析,分析认为桑干河断陷具有完备的圈闭及烃源岩,有良好的含油气性及勘探的潜能.     

A microfluidic device for simultaneous measurement of viscosity and flow rate of blood in a complex fluidic network

Blood viscosity has been considered as one of important biophysical parameters for effectively monitoring variations in physiological and pathological conditions of circulatory disorders. Standard previous methods make it difficult to evaluate variations of blood viscosity under cardiopulmonary bypass procedures or hemodialysis. In this study, we proposed a unique microfluidic device for simultaneously measuring viscosity and flow rate of whole blood circulating in a complex fluidic network including a rat, a reservoir, a pinch valve, and a peristaltic pump. To demonstrate the proposed method, a twin-shaped microfluidic device, which is composed of two half-circular chambers, two side channels with multiple indicating channels, and one bridge channel, was carefully designed. Based on the microfluidic device, three sequential flow controls were applied to identify viscosity and flow rate of blood, with label-free and sensorless detection. The half-circular chamber was employed to achieve mechanical membrane compliance for flow stabilization in the microfluidic device. To quantify the effect of flow stabilization on flow fluctuations, a formula of pulsation index (PI) was analytically derived using a discrete fluidic circuit model. Using the PI formula, the time constant contributed by the half-circular chamber is estimated to be 8 s. Furthermore, flow fluctuations resulting from the peristaltic pumps are completely removed, especially under periodic flow conditions within short periods (T < 10 s). For performance demonstrations, the proposed method was applied to evaluate blood viscosity with respect to varying flow rate conditions [(a) known blood flow rate via a syringe pump, (b) unknown blood flow rate via a peristaltic pump]. As a result, the flow rate and viscosity of blood can be simultaneously measured with satisfactory accuracy. In addition, the proposed method was successfully applied to identify the viscosity of rat blood, which circulates in a complex fluidic network. These observations confirm that the proposed method can be used for simultaneous measurement of viscosity and flow rate of whole blood circulating in the complex fluid network, with sensorless and label-free detection. Furthermore, the proposed method will be used in evaluating variations in the viscosity of human blood during cardiopulmonary bypass procedures or hemodialysis.     

Use of NSE/PS2m-transgenic mice in the study of the protective effect of exercise on Alzheimer's disease

In its late stage, Alzheimer's disease results in progressive muscle weakness in the arms and legs. The aim of this study was to determine whether mice expressing the skeletal muscle-specific mutant PS2 gene (a model of Alzheimer's disease) are a useful experimental system to study the protective effect of exercise on Aβ-42 reduction, improvement of behavioural function and changes in metabolic parameters. With this aim in mind, the transgenic mice were subjected to treadmill exercise for 3 months. The results showed that in transgenic mice, but not in normal mice, treadmill exercise resulted in a reduction of Aβ-42 deposits and an improvement in behavioural function, thereby restoring normal concentrations of total cholesterol, high-density lipoprotein cholesterol, low-density lipoprotein cholesterol and triglyceride. Thus, exercise may represent a practical therapeutic strategy for use with human patients with Alzheimer's disease.     

微生物燃料电池及其在能源领域的应用

在能源短缺和环境污染的双重压力下,微生物燃料电池以其独特的高效、清洁、适应性强的优点而得到人们青睐,并成为当前能源领域的研究热点。本文系统论述了微生物燃料电池的结构和工作原理,综述了其在产电、制氢和产甲烷等方面的应用现状,分析了存在的主要问题,展望了未来的研发工作。     

系统论与过程论双重视角下产学研合作机制探析

产学研合作是有力推进科学技术创新的高级形式,已经成为促进科技与经济紧密结合的关键环节。基于系统论和过程论的双重视角,重新解读产学研合作;产学研合作与其机制的耦合是进行产学研合作研究深层次考察的理论依据;在深刻把握产学研合作自身规律的基础上探讨产学研合作机制的设计原则、评价指标及其建构。     

加工时间可变的总完工时间排序两人合作博弈问题

研究工件加工时间与开始加工时间有关的情况下,两人合作共同加工一批工件的纳什博弈问题．每人有一台机器用于工件加工,以最小的总完工时间作为加工成本,通过确定这批工件的一个合理划分,使参与合作加工的两人都能得到满意的合作收益．     

《国史大纲》考辨三则

钱穆先生的《国史大纲》以纲目为体,行文精练.就其中所涉及的三个问题进行发散思维与考辨,对“伯禽”之名的形成与其封国之关系、“海鸥鸟”之称是指石虎还是佛图澄以及单襄公“所言之旨”做进一步的探究.     

武术“文化空间”释义及其表现特征

＂文化空间＂既是非物质文化遗产的重要表现形式,又是各种文化活动所演变、寄存和展示的特定场所或某一段时间。＂文化空间＂对某种文化的形成和进化起到决定或可能决定作用。运用文化人类学原理分析可知,武术＂文化空间＂兼具地理和文化两层面意义,具有地域性、活态性、传承性、整体性和场域性的特征。     

湖北省男子竞技网球发展的困境与出路

采用文献资料、问卷调查、访谈、统计分析等方法,分析湖北省男子竞技网球运动员的培养模式及体制,找出阻碍男子竞技网球发展的因素,提出适合我国男子竞技网球发展的新模式。