丙硫咪唑对鸭自然感染环肠科吸虫的驱除试验

经鼻分泌物涂片检查和抽样剖检诊断感染有环肠科吸虫的麻鸭群,按公斤体重分别给予25mg、50mg、75mg和100mg的丙硫咪唑进行驱除试验,其结果:减虫率分别为70.59％、76.47％、76.47％和82.35％。     

信仰的缺失与重塑

信仰是人的目的性要求的终极目标及趋向,是构成人的目的性要求的前提和基点。信仰危机产生于人的目的性要求与自然界、人的目的性要求与现实世界的双向否定性关系。由此提醒我们既要保持清醒的反思批判意识,又要坚持“负责的人性”,从而在创造自身的实践活动中葆有自由的可能和向上的张力。     

后冷战时期日本经济外交的特点及其战略转型

冷战后经济全球化和区域化趋势迅猛发展,国家之间的经济联系不断扩大和加强,主权国家开展外交活动越来越倾向于运用经济手段为其国家战略服务,经济外交已成为国家交往的重要方式。日本是世界上第一个将"经济外交"概念写入政府正式外交文件中的国家,其经济外交的实践对日本经济大国目标的实现起到了极其重要的作用。但自1991年"泡沫经济"崩溃后,持续的经济低迷使日本经济外交面临前所未有的挑战。目前及今后相当一段时期内的日本,将经受一场近代以来继明治维新、战后民主改革之后的第三次重大战略转型的严峻考验。     

多媒体教学手段在《理论力学》讲课中的应用

二十世纪后期电脑和信息技术在经济建设和科学技术的各个领域得到广泛的应用.在这样的形势下,高等学校中也面临着教育改革的迫切任务,如何在各门课程中,高质量和高效率地培养学生,已成为现实的问题.本文涉及<理论力学>课程的讲课方式的改革,介绍我们采用多媒体手段进行<理论力学>讲课的实践和体会,并提出一些有关的看法.     

论东亚民族主义的类型与特征

东亚民族主义是东方民族主义的一种形态。它的出现晚于西方民族主义 ,大致形成于 19世纪后半叶至 2 0世纪初期。其共通点是 :它的产生具有“应激———反应”性特点 ,是反西方列强威逼、侵略的产物 ;它具有自己独具特色的悠久的文化资源 ,尤其是“儒家文化”的人文资源 ;往往与权威政权相结合。东亚民族主义的内容十分宽泛 ,它在不同时期不同国度里 ,有着多种变形 ,表现为多种形态和特点 ,中国、日本、韩国、新加坡的民族主义就是东亚民族主义的几种重要形态     

Semi-online scheduling with “end of sequence” information

We study a variant of classical scheduling, which is called scheduling with “end of sequence” information. It is known in advance that the last job has the longest processing time. Moreover, the last job is marked, and thus it is known for every new job whether it is the final job of the sequence. We explore this model on two uniformly related machines, that is, two machines with possibly different speeds. Two objectives are considered, maximizing the minimum completion time and minimizing the maximum completion time (makespan). Let s be the speed ratio between the two machines, we consider the competitive ratios which are possible to achieve for the two problems as functions of s. We present algorithms for different values of s and lower bounds on the competitive ratio. The proposed algorithms are best possible for a wide range of values of s. For the overall competitive ratio, we show tight bounds of ϕ + 1 ≈ 2.618 for the first problem, and upper and lower bounds of 1.5 and 1.46557 for the second problem. The authors would like to dedicate this paper to the memory of our colleague and friend Yong He who passed away in August 2005 after struggling with illness. D. Ye: Research was supported in part by NSFC (10601048).     

Is volunteer labor part of household production? Evidence from married couples

Volunteer labor is generally modeled as an individualistic pursuit, akin to leisure or to human capital accumulation. Some activities labeled as volunteering, however, may be more usefully thought of as quid pro quo time commitments that are part of securing services for family members. Parents are frequently expected to volunteer, for example, when their children participate in youth sports leagues or school marching bands. In such cases, volunteering is essentially an instance of household production undertaken outside the home. Using data from the Panel Study of Income Dynamics, we divide volunteering into three categories—youth-related, religious, and non-youth-related secular—according to the likelihood that an instance of volunteering in the category represents household production. We find evidence that husbands and wives respond to one another’s time pressures such that youth-related volunteering looks like a task for which husbands’ and wives’ time inputs substitute for one another. Further, we find this pattern for housework, and not for other forms of volunteering. An increase in either spouse’s hours of market work will significantly reduce that spouse’s likelihood of volunteering for youth-related activities while raising the partner’s likelihood of volunteering. A similar pattern holds for hours volunteered to youth-related activities, with the wife’s responses achieving statistical significance.     

进程同步与互斥中信号量机制的使用

讨论了使用信号量机制实现进程同步与互斥的几个问题。     

贵州赫章可乐汉代土著墓葬试析

本文主要讨论了土著墓的时代和随葬品的文化内涵。我们认为原报告对可乐土著墓葬时代的判断不够准确,通过统计和比较分析得出其时代应在汉武帝开拓西南夷前后至西汉晚期,少数墓可晚至东汉初期。在此基础上,深入分析了不同类型的随葬品因素构成所反映的这时期土著文化与滇文化、巴蜀文化和汉文化之间不同内容和性质的文化关系,并进一步探讨了当地多元文化格局的内涵、特点、变迁及其原因。     

非织造布持续发展的主要原因

从非织造布的应用、生产工艺、原料资源等方面，分析了非织造布持续发展的主要原因及其未来进展。