基于第三方的安全电子支付模型的研究

探讨了电子商务支付系统的安全问题,分析了SET协议的基本结构和交易流程,根据电子商务的实际情况,对SET协议的流程做出适当的改进,提出了基于第三方支付中心的在线安全支付系统的解决方案。它将支付功能从商家系统剥离出来,作为独立的第三方支付中心,为各商家提供在线支付的支持。它优化了SET协议的模型结构,完善了交易流程,增强了交易的安全性。     

食品硒源的生物学研究进展

硒是人体必需的微量元素,对人类健康有重要意义,机体硒的来源主要是食品,本文概述了食品硒源的地域性,硒含量及硒形态差异,并对硒的代谢、生物利用度、组织细胞分布、膳食硒的适宜范围,硒的营养状态评价和富硒功能性食等生物学研究进展进行了综述。     

南宁地区办公建筑冬季室内热舒适性及其对空调能耗的影响

本文以问卷调查和现场测试数据为基础,采用标准有效温度SET探讨了南宁地区办公建筑冬季室内热舒适性,并与国内其它地区的研究进行了比较。研究发现,满意率为80%时的热舒适范围为14.4～23.7℃/SET,热感觉中性温度为19℃/SET;居民对热环境的敏感度较国内其它地区低;在当地居民可接受的室内热舒适范围内,空调能耗随SET的升高而增大;若以热中性温度为室内计算参数,与采用国家和地方标准规定值相比,南宁地区空调系统能耗将降低6.4%。     

A post-2020 EU energy technology policy: Revisiting the strategic energy technology plan

With the European Strategic Energy Technology Plan (SET Plan) expiring in 2020, the EU needs to revisit its energy technology policy for the post-2020 horizon and to establish a policy framework that fosters the achievement of ambitious EU commitments for decarbonization by 2050. We discuss options for a post-2020 EU energy technology policy, taking account of uncertain technology developments, uncertain carbon prices and the highly competitive global market for energy technologies. We propose a revised SET Plan that enables policy makers to be pro-active in pushing innovation in promising technologies, no matter what policy context will be realized in the future. In particular, a revised SET Plan should include a more technology-specific focus, provide the basis for planning and prioritization among decarbonization technologies, and should be based on a comprehensive approach across sectors. Selected technology targets and EU funding of innovation should be in line with the SET Plan prioritization.     

Interpolymer radical coupling: A toolbox complementary to controlled radical polymerization

The current review focuses on the relevance and practical benefit of interpolymer radical coupling methods. The latter are developing rapidly and constitute a perfectly complementary macromolecular engineering toolbox to the controlled radical polymerization techniques (CRP). Indeed, all structures formed by CRP are likely to be prone to radical coupling reactions, which multiply the available synthetic possibilities. Basically, the coupling systems can be divided in two main categories. The first one, including the atom transfer radical coupling (ATRC), silane radical atom abstraction (SRAA) and cobalt-mediated radical coupling (CMRC), relies on the recombination of macroradicals produced from a dormant species. The second one, including atom transfer nitroxide radical coupling (ATNRC), single electron transfer nitroxide radical coupling (SETNRC), enhanced spin capturing polymerization (ESCP) and nitrone/nitroso mediated radical coupling (NMRC), makes use of a radical scavenger in order to promote the conjugation of the polymer chains. More than a compilation of macromolecular engineering achievements, the present review additionally aims to emphasize the particularities, synthetic potential and present limitations of each system.     

仓储库的发展

文章从仓储库的发展背景、仓储库管理的信息内容、采用的技术三方面对仓储库的发展历程进行了回顾。并且根据这三方面将仓储库的发展分为三阶段： 集中在数据管理阶段、 集中在应用系统开发阶段、 集中在企业所有信息阶段。     

贝氏体钢穿孔顶头工作锥裂纹及防止措施

分析了贝氏体钢穿孔顶头工作锥裂纹的特点、产生原因；提出调整顶头结构尺寸可有效防止顶头工作锥裂纹。     

三种巧克力晶型衍变与起霜花关系研究

本文借助X衍射仪对不同促霜时间内不同起霜程度的巧克力进行晶相检测，结果表明晶相衍变速率大小与起霜程度关系紧密，速率大则起霜严重，促霜前期（5天内），巧克力均未起霜，具有相同的晶相，促霜后期（45天），三种巧克力均有不同程度的霜花，其中CC最严重，LC轻微，TC介于两者之间，XRD谱图反映的晶相也说明了这一现象，促霜中期（20天），CC起了霜，而LC和TC尚无起霜迹象，这时CC中的晶相与LC和TC的相比相差很大，LC和TC的晶相则一致。     

21世纪高密度数据光盘的市场动向

介绍了数据记录用 CD－R、 CD－RW、MO(磁光盘 )、 DVD－R、 DVD－RW光盘的市场发展，重点指出 PC(电脑 )和互联网的普及将促进 21世纪高密度数据光盘记录介质的市场需求。     

Observation of Coherent Charge-State Mixing in Asymmetric Bloch Transistors

The reduced switching current of an excited energy band in a Bloch transistor can be used to detect microwave-induced interband transitions. Spectroscopic measurements of the band gap are performed by mapping the frequency dependence of the excitation threshold where the microwave photon energy and band gap are equal. This excitation threshold also provides a probe of charge-state mixing on the island of the transistor. Any asymmetry in the junctions of the transistor makes the coherent mixing of charge states appear as a finite gap splitting at the electrostatic degeneracy point between states differing by one excess Cooper pair on the island. The measured gap splitting in an asymmetric transistor clearly demonstrates the effect.