世界文化和不可知论的政见——一个致力于跨文化融洽交流的计划

就世界文化课程内容的具体设置,及联合大学与传媒以更好地实现课程积极目标等诸问题进行探讨.通过多层次的论证强调指出人们始终持有相异或相冲突的宗教、哲学以及意识形态,尚没有一种普世真理足以使世间所有人心悦诚服.即便是广泛接受和运用中的科学知识,其发展亦受阻于人类本身的局限而不可确定.尽管科学在前沿问题研究上竞争激烈,也仍然无法回答和消除所有的问题和差异.因此,从全球或泛人类立场观之,人类现有的知识与理解能力具有不确定和不完整的特点,而这样的特点浸透在所有的具体文化信仰之中.认识到共同局限性的人们--尤其是政界的领导人--亟需摒弃极端的文化分离思想,以更宽容理解的心态思考和行动,这样才能避免不同民族及不同国家间的不断冲突和互相伤害.     

Localization of a Robotic Capsule for GI Motility Inspection with a Portable Ultrasonic System

IntroductionResearchesonmicromedicaldeviceandmicromedicalrobot,especiallytheinvivoinspectionsystemworkinginalimentarycanalorinbloodvesselwithlittledamageornondamagetohumanbodyhavebeenundertakenandreportedbyexpertsinmanycountries.Thesesystemsusuallyownmanyadvantagessuchas:smallvolume,lowpowerconsumption,littleinterferencetoworkingsurroundings,socangreatlyenlargethescopesofmedicalexaminationandrelievethepatientsofdiscomfortcausedbynormalprocedures.Thecapsuleendoscope“NORIKAsystem”developedby…     

Nuclear Technique and Agriculture in China

Nuclear technique is a powerful scientific tool in agricultural research, an area with fruitful achievements in China. Application of nuclear technique in agriculture (Nuclear Agricultural Sciences) based on the development of related science and technology is a high-tech area, and also a significant aspect of non-electrical power application of nuclear technique. As an important component of agricultural science and technology, Nuclear technique application in agricultural field has achieved a lot and made remarkable contributions to the economic, social and ecological development of China. The current paper reviews the achievements, and presents the situation of the application of nuclear technique in the Chinese a-griculture briefly. The author strongly suggests that Chinese     

Research Frontiers of Agricultural Economics and Management

The focus of research on Agricultural Economics and Management (AEM) has been switching from de-veloped countries to developing countries. In important international journals on AEM such as ““American Jour-nal of Agricultural Economics““ and ““Agricultural Eco-nomics““, the research objectives mainly focus on AEM problems in developing countries, e.g. the effects ofglobalization and liberalization on agricultural produc-tion in developing countries, and problems in agricul-tural resources and environmental protections in devel-oping countries.     

Fabrication and Properties of CoSm-Based Multilayer Thin Films

In recent years, SmCo series thin films have been found to be good candidates for fabricating integrated electromagnetic components and ultrahigh density magnetic recording media[1,2]. Up to now,intensive studies of such films have been carried out in order to obtain appropriate microstructure, crystallographic orientation and other properties. Substitution of Cu or Ni for Co in SmCo/Cr series films leads to a decrease of the saturation magnetization, magnetic switching volume, and to an increase of uniaxial anisotropy and coercivity[3-5].Various deposition conditions have also been investigated[6]. The large increase in coercivity for the annealed SmCo/Cr films is due to the growth of crystallitest[7,8]. In this article, we report a study of the deposition process,structure, and magnetic behavior of sputtered Sm (Co,Cu, Ti)/Cr series thin films.     

Growth of Magnetite Nanoparticles under Magnetic Fields

1 Introduction Over the past several years, the preparation and characterization ofnanoscale magnetic materials, especially one-dimensional (1D) nanostructure, have attracted much attention as the nanomaterials would allow investigating the fundamental aspects of magnetic-ordering phenomena in magnetic materials with reduced dimensions and could lead to new potential applications such as data storage technology[1-6].     

机械合金化工艺对Fe-Ni合金显微结构的影响

对机械合金化制备的Fe-Ni粉体利用X射线衍射(XRD)进行分析，得到了不同Ni含量和不同球磨时间Fe-Ni纳米晶的XRD谱．实验表明，w(Ni)=10％和20％时，Ni溶入Fe晶格，分别在球磨20h和50h后形成单一的a(bcc)相；w(Ni)=50％时，其先后经历了γ(fcc)→←a(bcc)正逆转变，在球磨120h后最终形成单一γ(fcc)相．无论是a(bcc)相还是γ(fcc)相．它们的固溶度均比块体Fe-Ni合金显著提高．w(Ni)=35％时，则始终是两相共存．对试样的XRD谱采用3种不同的方法测定了Fe-Ni粉体的晶粒尺寸和显微畸变，发现经球磨20h后，不同Ni含量的粉体均呈纳米结构，并随球磨时间延长，Fe-Ni纳米晶的晶粒尺寸下降而显微畸变上升．     

红豆杉细胞培养生产紫杉醇的研究进展

综述了近年来红豆杉细胞培养生产紫杉醇的研究进展, 包括红豆杉细胞培养生产紫杉醇的代谢调节、无机盐、植物生长调节因子、糖分及其它因素对红豆杉细胞生长和紫杉醇生产的影响等.着重介绍了前体饲喂、添加抑制剂和添加诱导子对红豆杉细胞生长及紫杉醇生产的影响.     

入侵检测技术原理剖析及其应用实例

从入侵检测技术的基本原理出发，描述了入侵检测系统(IDS)的组成，论述了IDS的主要功能，并给出了它在网络系统中的实际应用方法。     

纳米Ni-Al2O3金属陶瓷粉末热压致密化过程

采用粒径小于100 nm,金属Ni包覆Al2O3得到的纳米Ni-Al2O3化学包覆粉为原料,将Ni含量不同的几种纳米Ni-Al2O3(粒径约为38 nm)金属陶瓷复合粉末首先采取模压成形方式压制成直径为30 mm的圆片,然后放在石墨模具中在热压机上进行热压,研究热压(HP)温度和Ni含量对致密化过程的影响.研究结果表明:当Ni含量为20%和热压温度为1 400℃时,制品密度和显微硬度最高;在1 400℃热压2 h,Al2O3-Ni2O烧结体的相对密度最高,达到99.6%,Al2O3-Ni5的显微硬度HV达到1 690.9kg/mm2;随着Ni含量的增加,制品硬度降低,当Ni含量超过20%时,硬度降低非常显著,Ni含量为50%时HV降至1 316.7 kg/mm2;烧结体中Ni颗粒均匀分布在基体中,且大部分位于三角晶界处,有效地阻止了Al2O3基体晶粒的长大.