Mathematical Modeling of Heat and Mass Transfer during Convective Dehydration of an Anisotropic Cylindrical Foodstuff

Two‐dimensional, unsteady‐state mass transfer was studied for air drying of an anisotropic finite cylindrical body. A mathematical model was developed for predicting the temperature of the drying sample at any time and moisture in any position in the drying sample at any time. The anisotropic nature of the drying material was considered in the mathematical model by taking into account the different moisture diffusivities in the axial and radial directions. A cut fresh green bean was used as an anisotropic material and a pilot‐scaled dryer was set up to investigate the drying behavior of this foodstuff. Several length‐to‐diameter ratios of fresh green beans were considered and the mathematical model was validated by comparison of the predicted values of average moisture content with the experimental data. The model was used to predict the moisture distributions inside the drying samples. Different moisture content distributions in the axial and radial directions during drying confirms the anisotropic nature of cut green bean samples. © 2013 Wiley Periodicals, Inc. Heat Trans Asian Res; Published online in Wiley Online Library ( wileyonlinelibrary.com/journal/htj ). DOI 10.1002/htj.21119     

泛在、移动互联网的体系结构

文章针对现有互联网由于原始设计模式方面的不足,难以满足泛在、移动用户的多元化网络服务需求的问题,创造性地提出全新的泛在、移动互联网体系理论与总体框架;创建一种。基础设施层。模型与理论,解决用户在任何地点、任何时间、以任何方式接入到互联网的问题;建立一种。普适服务层”模型与理论,实现对普适服务的支持;并提出新网络体系下的移动性管理机制。新的网络体系结构可克服现有互联网存在的弊端,有效满足泛在、移动方面的多元化网络服务需求。     

How to successfully promote ICT usage: A comparative analysis of Denmark and Japan

The paper presents a comparative analysis of two advanced ICT nations, Japan and Denmark. While Japan is very advanced with respect to its telecommunications infrastructure, Denmark has come further than Japan regarding the use of ICT infrastructures. This paper compares Denmark, a leader in ICT usage, and Japan, which lags in that regard, analyzes differences in institutions, technologies, and services offered, and examines factors contributing to the success of Denmark in promoting ICT usage from a Japanese perspective. Strong governmental leadership, and common techno-infrastructure such as personal ID and digital signature that serve different systems, and user-orientation of service design are the characteristics of Danish efforts absent in Japan.     

绿茶汁澄清工艺的研究

比较池明矾、硅胶、高岭土、碱式氯化铝和聚丙烯酰胺５种物质对绿茶汁的洽效果,发现碱式氯化铝的澄清效果较好;通过Ｌ９（３＾４）正交实验优化,碱式氯化铝澄清绍茶汁适宜的条件为：ＰＨ＝６,用量０．１％和温度１５℃。     

超滤膜分离对绿茶茶水处理效果的影响

研究了超滤膜对绿茶茶水的分离效果 ,为超滤分离技术应用于绿茶饮料和茶多酚的工业生产提供了有关依据。研究结果表明 ,截留分子量小于 2 0 0 0 0的超滤膜 ,对茶水中的固形物、茶多酚的截留率分别高达 89%、 87% ;截留分子量高于 10 0 0 0 0的超滤膜可有效截留茶水中的大分子蛋白质和果胶类物质 ,改善了茶水的溶液特性 ,有利于茶多酚的工业生产 ;操作温度对茶水的超滤效果有显著影响。     

关于云计算及其建设的探讨

通过对云计算的概念、产生原因、发展、目前国内外的状况的认知,特别是根据云计算的使用特点,提出我国政府应该把云资源作为基础设施建设来投资。要在国内选择适当的地域,建设适度的节点数等。避免对云计算的重复和盲目投资,克服云计算被私企掌握等弊端。保证云资源被全社会公平的使用和合理分配。让云计算能够为中国特色的社会主义社会服务。     

一种径向基神经网络模型在图书馆能耗监测上的应用

由于大多数建筑没有安装能耗监测设备,如何合理、准确地制定节能措施以及实现科学化管理是一个比较困难的问题.针对这一问题,本文将日最高温度、工作时间、湿度、太阳辐射、人员密度作为影响图书馆能耗的主要因素,构建了基于径向基神经网络的能耗数据分析网络,并证明了径向基神经网络具有良好的拟合性能.为降低图书馆能耗的节能措施的制定和节能管理提供可靠依据.     

家装知识库设计与实现

家装行业作为与民生息息相关的重要行业,一直都是群众关心的重点对象。针对目前装饰装修行业存在较多专业化知识,消费者无从辨别建材产品的优劣。对设计、建材、施工等各环节过程是否绿色无从知晓,普通群众对家装行业的知识并没有一个官方认可的渠道进行学习,容易造成认知的偏差。因此,通过信息化手段,实现现有信息资源的整合,对绿色装修的专业知识进行推广普及。搭建一个系统的、标准的、权威专业的知识库系统,为装饰装修行业公共服务平台提供专业知识内容,引导和帮助全行业更好地了解和推进绿色装修。     

PKI在安全邮件传输上的应用

针对邮件传输的安全问题，提出了一种安全邮件传输的解决方案。该方案依据PKI(公钥基础设施)的应用原理，采用PKI与S／MIME相结合的方法，建立了基于PKI的安全邮件传输体系。经过实际应用和运行表明，该方案有效的解决了邮件传输的安全问题。     

Green Base Station Solutions and Technology

Base station power consumption is the biggest power issue concerning wireless networks. Saving power in base stations is therefore the primary focus in green wireless network development. This paper discusses green base stations in terms of system architecture, base station form, power saving technologies, and green technology applications. It explores effective ways of reducing power consumption in base stations.