校园网网站建设和网页制作的方法

教育的信息化发展推动了校园网建设,校园网与教育的有机结合又可以促进教育的信息化进程。本文主要介绍了校园网站建设及网页制作的一些方法和技巧。     

图书馆网络设备及软件平台的配置

本文详述了北京建筑工程学院图书馆网络的软件和硬件配置状况,并介绍了该图书馆网络化和自动化的工作过程和经验,通过以专业网站的形式为读者提供专业电子信息服务的尝试,为发展网络化的专业电子图书馆确立了目标。     

中小型企业网站建设方案

在我国经济构成中,中小型企业占有十分重要的地位,中小型企业数占全部企业数的99%。本文主要介绍了中小型企业网站建设的一些方法和技巧。     

一种基于用户访问模式优化网站结构的算法

提出一种算法，通过挖掘Web日志中的关联规则，发现用户访问兴趣间的关联度和站点拓扑结构的不一致，并结合网站既有的拓扑结构，对于通常在用户的某次浏览过程中同时被访问．但在网站拓扑中相距较远的内容页面集，增加页面间的直接链接，最终实现网站系统结构的调整、优化，提高网站的访问效能。     

校园网网站建设和网页制作的方法

教育的信息化发展推动了校园网建设。校园网与教育的有机结合又可以促进教育的信息化进程。本文主要介绍了校园网站建设及网页制作的一些方法和技巧。     

A Simulation Model for Heat Pump Dryer Plants for Fruits and Roots.

Dryer design requires food properties, drying rate and mass-heat transfer coefficients. These values change continuously during drying due to changes in food fractions, particularly the water fraction. The high energy demand and costs allied to inefficient devices, creates a great need for new processing equipment. Along these guide-lines, several heat pump drying research projects were established at the Norwegian University of Science and Technology. The heat pump dryer provides high quality final product as its drying conditions can be controlled. Its efficiency and non-polluting operation come from closed air-refrigerant circuits and from its ability to fully recover the latent heat of moist air as it exits the drying chamber. Most of the above features are quite the opposite of the conventional dryer characteristics. Several experiments were made on heat pump drying of fruits and roots at temperatures from -22.5 to 40°C to obtain data and correlations on thermophysical properties, specific enthalpy and rehydration. Also, tests were done on drying rate, moisture content, drying constant, effective mass diffusivity and heat and mass transfer equations. The next important phase is the development of a simulation model to predict the performance and characteristics of the heat pump dryer plant. The objectives of the present work are to develop and lo test a heat pump dryer simulation model. The simulation provides results on the characteristics of both plant and components which are integrated by heat and mass transfer equations. The program has menus with click-on icons, input and output pop-up dialogue boxes. The usual commands such as, file-open, file-save, edit-delete are available in this program simply called Hpdryer. The model contains moist air psychrometric. natural and conventional refrigerant property libraries. Ammonia is a time-tested, self-alarming and natural refrigerant. It has been used extensively in the past, and it has better thermodynamic and transport properties than halocarbons. Safety is easily attained by design and its restrictive standards have helped increase its use in several countries. There are 36 ammonia installations in Norway and in the United Kingdom, including a drying plant. Ammonia has zero Odp, zero Gwp and the recent R&D has led to viable small-sale heat pump plants. Ammonia and dichlarodifluoromethane refrigerants were used in the test cases simulated by Hpdryer madel.     

A Simulation Model for Heat Pump Dryer Plants for Fruits and Roots.

ABSTRACT

Dryer design requires food properties, drying rate and mass-heat transfer coefficients. These values change continuously during drying due to changes in food fractions, particularly the water fraction. The high energy demand and costs allied to inefficient devices, creates a great need for new processing equipment. Along these guide-lines, several heat pump drying research projects were established at the Norwegian University of Science and Technology. The heat pump dryer provides high quality final product as its drying conditions can be controlled. Its efficiency and non-polluting operation come from closed air-refrigerant circuits and from its ability to fully recover the latent heat of moist air as it exits the drying chamber. Most of the above features are quite the opposite of the conventional dryer characteristics. Several experiments were made on heat pump drying of fruits and roots at temperatures from -22.5 to 40°C to obtain data and correlations on thermophysical properties, specific enthalpy and rehydration. Also, tests were done on drying rate, moisture content, drying constant, effective mass diffusivity and heat and mass transfer equations. The next important phase is the development of a simulation model to predict the performance and characteristics of the heat pump dryer plant. The objectives of the present work are to develop and lo test a heat pump dryer simulation model. The simulation provides results on the characteristics of both plant and components which are integrated by heat and mass transfer equations. The program has menus with click-on icons, input and output pop-up dialogue boxes. The usual commands such as, file-open, file-save, edit-delete are available in this program simply called Hpdryer. The model contains moist air psychrometric. natural and conventional refrigerant property libraries. Ammonia is a time-tested, self-alarming and natural refrigerant. It has been used extensively in the past, and it has better thermodynamic and transport properties than halocarbons. Safety is easily attained by design and its restrictive standards have helped increase its use in several countries. There are 36 ammonia installations in Norway and in the United Kingdom, including a drying plant. Ammonia has zero Odp, zero Gwp and the recent R&D has led to viable small-sale heat pump plants. Ammonia and dichlarodifluoromethane refrigerants were used in the test cases simulated by Hpdryer madel.     

构建数字化校园体系结构设计研究

目前各高校都在规划和设计各自的数字化校园,通过对数字化校园在构建体系结构时从理论上进行分析与研究,以便更好的为数字化校园的建设提供切实可行的理论依据,首先对数字化校园进行一个详细的描述,具体的从数字化校园的硬件框架设计、软件框架设计、总体性能要求、门户平台的设计、服务器系统的结构设计和数据库的选型等几个方面对高校数字化校园总体框架设计进行研究.