影响瞬态电磁生物效应实验重复性的要素

从瞬态电磁生物效应的特点出发，对影响其实验重复性的主要物理要素进行了分析，并运用量子理论推出了随着实验对象复杂程度的增加，瞬态电磁脉冲所产生的非热生物效应实验的重复性降低，从而得出提高实验重复性的3个方向，对研究生物系统内部复杂的相互作用而加以控制，又是其中更为重要的解决手段。     

《多媒体技术及应用》课程教学改革的实践探讨

阐述了目前中小学计算机课程教学的现状和存在的问题，探讨了针对师范院校的学生学习多媒体技术及应用的重要性，提出了有关着重培养多媒体技术及应用的设计能力的教学过程和方法，并在计算机教育专业的课程设置与教学中得到实践，取得了较好的教学效果。     

Non-Fourier Heat Conduction Effects During High-Energy Beam Metalworking

Non-Fourier heat conduction induced by ultrafast heating of metals with a high-energy density beam was analyzed. The non-Fourier effects during high heat flux heating were illustrated by comparing the transient temperature response to different heat flux and material relaxation times. Based on the hyperbolic heat conduction equation for the non-Fourier heat conduction law, the equation was solved using a hybridmethod co mbining an analytical solution and numerical inversion of the Laplace transforms for a semiinfinite body with the heat flux boundary. Analysis of the temperature response and distribution led to a criterion for the applicability of the non-Fourier heat conduction law. The results show that at a relatively large heat flux, such as greater than 108 W/cm2, the heat-affected zone in the metal material experiences a strong thermal shock as the non-Fourier effects cause a large step increase in the surface temperature. The results provide a method for analyzing transient heat conduction problems using a high-energy density beam, such as electron beam deep penetration welding.     

三氯杀螨醇生物效应及其检测方法研究进展

对常用杀虫剂三氯杀螨醇(dicofol,DCF)的研究发现,它具有毒性,致畸、致突变、致癌性和 雌激素效应等.为了对其生物效应及检测方法有个整体认识,对其研究现状进行了总结,具体论述 了国内外在其生物效应及检测方法上所做的工作和得出的结论,并提出进一步的研究思路.     

Effects of diatoms on reproduction and growth of marine copepods

Two hot spots in marine ecology, deleterious effects of diatoms and feeding selectivity of copepods, as well as new progress on these two issues achieved in the recent ten years, are reviewed. These two issues are considered correlated closely. Diatoms and their metabolites can induce deleterious effects on growth, reproduction and development of copepods, including increase of mortality and decrease of egg production, hatching and growth rates. Such negative effects, resulting from either chemical toxin or nutritional deficiency, can be conquered in natural environments by diverse feeding. It is therefore concluded that deleterious effects of diatoms observed in laboratory or during blooming period are only a special case that accommodation of feeding strategy of copepods is disabled. To understand their feeding strategy in natural environments is a prerequisite to explaining the mechanisms of deleterious effects caused by diatoms, and makes it possible to re-evaluate the energy flow in marine ecosystems.     

鼓浪屿入侵植物猫爪藤危害状况研究

通过野外调查, 分析了入侵植物猫爪藤在鼓浪屿分布现状及危害状况.结果表明:①受猫爪藤危害的树种有41种, 猫爪藤的危害降低了鼓浪屿原有的生物多样性和优美的植被景观, 严重破坏了国家风景名胜区的生态平衡; ②根据受猫爪藤危害的林地面积及乔木受害的程度, 将受害等级分为5级. 其中, 受害最严重的生长地点为: 笔山路7号、殷承宗家旁、燕尾山、孔雀园、鼓新路以及钱币博物馆外等; ③造成危害的藤本植物还有五爪金龙、老鼠拉冬瓜、心叶落葵薯、珊瑚藤、鸡屎藤等.这些种类或以单种, 或与猫爪藤混生构成不同的组合对风景林木造成危害.从危害程度看,猫爪藤最严重, 其次是五爪金龙和老鼠拉冬瓜. 采用生态制图表达了猫爪藤的分布与危害状况, 为综合防治与植被恢复、建立动态的生态监测和预警、预报系统提供基础.     

磁悬浮飞轮低功耗控制方法仿真研究

在储能、航天领域中应用磁悬浮飞轮时,系统功耗是需要解决的一个关键问题。在高转速下,飞轮陀螺效应对转子稳定影响很大,控制器需要对其进行抑制。为此,需要研究低功耗控制方法。该文昕设计的控制器,既考虑了陀螺力矩的抑制,又考虑了功耗的降低,将控制力与控制电流分别进行设计。控制力采用位移交叉算法产生,以抑制陀螺力矩;而控制电流根据所需控制力,采用非线性方法构建,实现了零偏置电流和电磁铁的单边工作,从而降低系统功耗。仿真结果表明,此低功耗控制方法可在高转速下稳定系统。     

根施不同形态硅制剂对小麦白粉病的作用效果研究

本文研究了根施三种不同形态硅制剂对小麦白粉病的作用效果.结果表明,溶胶态的氧化硅溶胶、分子态的正硅酸乙酯和离子态的硅酸钠对小麦白粉病均有一定的作用效果,防治效果分别为1.02%、51.36%、54.08%.     

油菜素内酯生物学效应及其应用

本文介绍了油菜素内酯的早期发现、化学结构特征与生理活性相关性;并结合试验结果测定油菜素内酯对多种作(植)物生长、发育的生理效应,分析了油菜素内酯促进作(植)物增效作用的原因,记述了油菜素内酯在农业生产中应用的近况,为广泛利用油菜素内酯提供一些依据。     

中细支摩擦纺纱分梳工艺参数对成纱质量的影响

本文首先通过定量分析,对摩擦纺纱分梳质量及其主要影响因素进行了讨论。在此基础上,采用二次通用旋转组合设计的试验设计方法,建立了主要的分梳工艺参数与中细支摩擦纺成纱质量的回归方程。分析和讨论的结果表明,分梳刺辊转速与纺纱号数的合理选配对保证纺纱品质指标、降低成纱不匀率和粗细节有着重要的意义。