基于网络技术的在线答疑系统的设计与实现

随着计算机的发展，教育模式也随之发生了转变，基于互联网的学习系统也得到了越来越广泛的应用。为此，介绍了基于网络技术的在线答疑系统的设计与实现。它充分发挥了互联网的优势，使学生在获取知识时更具有主动性。     

试论企业网络道德建设

随着计算机网络的普及，越来越多的网络道德问题展现在人们的面前，针对网络使用中的不道德现象，提出了企业网络道德防火墙建设的方法，途径及网络道德建设的几个阶段。     

基于优化SDH和FRIDAS的灌区通讯网络

为了提高大型灌区通讯网络的技术水平，首先介绍了最新的SDH技术和卫星帧中继综合业务系统FRIDAS的特点，然后提出网络的设计原理及结构，最后通过云南省曲靖灌区的通讯网络的改进说明了此套方案的可行性及实用性。     

多媒体教学条件下网络课程教学设计策略

随着网络技术在教学中的广泛应用,网络课程的数量迅猛增长,形成了相当的规模,但同时并存着一些问题亟待解决。分析了网络课程教学存在的问题,并针对问题对网络课程教学中的内容设计、学习活动设计和评估反馈设计综合分析,提出了注重教学设计,以学生为主体深入开展情境教学的网络课程教学设计策略。      

《家禽常见病防治学》网络课件的设计与制作

以《家畜常见病防治学》这门教材为例，介绍了如何利用Dreamweaver UltraDev和ASP等技术手段设计与制作网络课件。     

JAVA语言在优化WEB性能中的作用

在互联网迅猛发展的时代，从WEB上浏览和下载成为人们获取信息的主要途径。但是网络的拥挤、带宽的限制等因素造成了网络信息交互速度的下降，优化WEB性能、提高网络速度就成为业内人士悉心关注的问题。为此，针对WEB优化的标准和策略问题，阐述了优化JAVA代码的各种方法，用以降低网络延迟。提高吞吐量和网络访问的效率，从而使WEB性能得到优化。     

新疆网络协同设计与制造技术应用及实施策略

通过对国内外网络协同设计和制造技术应用情况的分析,提出在新疆制造业应用网络协同设计与制造技术的整体解决方案。     

多学科协同设计中分布式约束网络求解技术

在对分布网络环境下多学科协同设计约束网络求解中的并发控制、死锁和一致性维护等问题进行详细分析的基础上,提出了一种以时间为判断标准的加锁算法来解决约束操作中的上述问题。提出了“写锁”和“读锁”2种加锁状态的约束资源的锁定策略,来考虑网络传输的延时性和提高并行操作的效率,并给出了主要算法的实现说明。     

双代号时标网络计划技术在滴灌工程施工管理中的应用

在招投标阶段招标文件要求采用网络图编制网络计划，在施工准备阶段监理工程师要求采用网络计划进行进度控制，在施工过程中需要使用网络计划进行工期索赔和相关窝工费索赔，在网络计划普及的今天，滴灌工程建设领域精准推进网络计划在项目管理中的应用势在必行。本文着重介绍了网络计划的机理和双代号时标网络计划技术特点及在施工管理中的应用优势，并对其在滴灌工程施工管理中的应用进行分析，为相关工作者提供参考。     

农业院校网络教学新思维

随着网络教学的普及和深入，教师必须自觉地以网络为主导重新设计教学，为此介绍了对农业院校网络教学的新构想，论述了网络教学法和网络教学优势。     

Overland water and salt flows in a set of rice paddies

Cultivation of paddy rice in semiarid areas of the world faces problems related to water scarcity. This paper aims at characterizing water use in a set of paddies located in the central Ebro basin of Spain using experimentation and computer simulation. A commercial field with six interconnected paddies, with a total area of 5.31 ha, was instrumented to measure discharge and water quality at the inflow and at the runoff outlet. The soil was classified as a Typic Calcixerept, and was characterized by a mild salinity (2.5 dS m⁻¹) and an infiltration rate of 5.8 mm day⁻¹. The evolution of flow depth at all paddies was recorded. Data from the 2002 rice-growing season was elaborated using a mass balance approach to estimate the infiltration rate and the evolution of discharge between paddies. Seasonal crop evapotranspiration, estimated with the surface renewal method, was 731 mm (5.1 mm day⁻¹), very similar to that of other summer cereals grown in the area, like corn. The irrigation input was 1874 mm, deep percolation was 830 mm and surface runoff was 372 mm. Irrigation efficiency was estimated as 41%. The quality of surface runoff water was slightly degraded due to evapoconcentration and to the contact with the soil. During the period 2001–2003, the electrical conductivity of surface runoff water was 54% higher than that of irrigation water. However, the runoff water was suitable for irrigation. A mechanistic mass balance model of inter-paddy water flow permitted to conclude that improvements in irrigation efficiency cannot be easily obtained in the experimental conditions. Since deep percolation losses more than double surface runoff losses, a reduction in irrigation discharge would not have much room for efficiency improvement. Simulations also showed that rice irrigation performance was not negatively affected by the fluctuating inflow hydrograph. These hydrographs are typical of turnouts located at the tail end of tertiary irrigation ditches. In fact, these are the sites where rice has been historically cultivated in the study area, since local soils are often saline-sodic and can only grow paddy rice taking advantage of the low salinity of the irrigation water. The low infiltration rate characteristic of these saline-sodic soils (an experimental value of 3.2 mm day⁻¹ was obtained) combined with a reduced irrigation discharge resulted in a simulated irrigation efficiency of 60%. Paddy rice irrigation efficiency can attain reasonable values in the local saline-sodic soils, where the infiltration rate is clearly smaller than the average daily rice evapotranspiration.     

瓦房店市水果生产标准化发展研究

瓦房店市是我国重要的水果生产基地,在国内水果生产领域占有重要地位。随着水果市场化的不断深入,如何满足和适应国内外市场需求成为瓦房店市水果生产的关键问题。从瓦房店市水果生产实际出发,阐述了实施水果生产标准化的必要性,提出了发展水果生产标准化的具体措施。     

金谷子耐旱TG118引种试种及推广应用

对引进的谷子新品种金谷子耐旱TG118进行品种比较试验和多点试种。结果表明：该品种抗旱、耐瘠、适应性强,稳产、高产、抗病抗风抗倒伏强,品质优良,粮草兼用,种植简单,省工易管;一般产量在6000kg/hm2以上,比当地主栽品种增产20%以上。最高产量达9450kg/hm2,适于在辽西北地区推广应用。     

对《种子法》存在问题的探讨

《种子法》是我国种植业第一部法律。自实施以来,为依法加强种子管理提供了有力的法律支撑,促进我国种子产业发生翻天覆地的变化。但随着依法管理工作的深入和种子产业的快速发展,《种子法》及配套规章的一些问题逐步显现出来。对《种子法》及配套规章存在的问题进行深入分析,对需要进一步补充的章节以及需要调整的内容进行深入探讨,以求更加完善和明确。     

Review of the Egyptian experience in implementing land drainage projects

About 30 years have passed since the Government of Egypt embarked on implementing a series of large scale drainage projects. At present, about 3.8 million acres have been provided with drainage systems on the basis of systematic pre-drainage investigations and designs. The target is to provide drains in approximately 6.4 million acres in the Nile Valley and Delta.The implementation of the subsurface drainage system is carried out by the public sector and private contractors under direct supervision of governmental regional departments. The implementation process depends on many factors related to the drainage material, machinery, manpower, site requirements, farmers and organizations involved. Problems and constraints are sometimes challenging, however, the annual rate of implementation has gradually increased to 170,000 acre/year.This paper discusses the different aspects involved in the implementation process of drainage systems. The development in materials, machinery and construction technologies will be reviewed. Institutional and management factors are going to be also considered.     

和谐社会理论建设的几点哲学思考

在新世纪,面对机遇和挑战,党的十六大把“社会更加和谐”作为全面建设更高水平的小康社会的一个重要目标。中国人素有社会和谐的理想;西方人自古也向往社会和谐;借鉴东西方两种和谐社会思想的经验、教训,构建社会主义和谐社会理论。     

A European irrigation map for spatially distributed agricultural modelling

We present a pan-European irrigation map based on regional European statistics, a European land use map and a global irrigation map. The map provides spatial information on the distribution of irrigated areas per crop type which allows determining irrigated areas at the level of spatial modelling units. The map is a requirement for a European scale assessment of the impacts of irrigated agriculture on water resources based on spatially distributed modelling of crop growth and water balance. The irrigation map was compiled in a two step procedure. First, irrigated areas were distributed to potentially irrigated crops at a regional level (European statistical regions NUTS3), combining Farm Structure Survey (FSS) data on irrigated area, crop-specific irrigated area for crops whenever available, and total crop area. Second, crop-specific irrigated area was distributed within each statistical region based on the crop distribution given in our land use map. A global map of irrigated areas with a 5′ resolution was used to further constrain the distribution within each NUTS3 based on the density of irrigated areas. The constrained distribution of irrigated areas as taken from statistics to a high resolution dataset enables us to estimate irrigated areas for various spatial entities, including administrative, natural and artificial units, providing a reasonable input scenario for large-scale distributed modelling applications. The dataset bridges a gap between global datasets and detailed regional data on the distribution of irrigated areas and provides information for various assessments and modelling applications.     

粉质仪和拉伸仪在面粉生产中的应用

在介绍粉质仪和拉伸仪结构和原理的基础上,探讨了粉质曲线中吸水率、形成时间、稳定时间、弱化度和评价值等指标与面粉品质的关系,以及如何根据拉伸曲线中面团最大拉伸阻力、延伸度和拉伸曲线面积等指标来评价面团品质,并结合生产实际,概述了粉质仪和拉伸仪在面粉生产中的作用。     

农村信息化服务的现状及建设措施

分析当前我国农村信息化服务的现状,提出加强农村信息化服务的新举措。     

车辆ABS控制算法的研究及探讨

对现代汽车的ABS控制算法作了一些简单的介绍,同时指出了它们的一些缺陷,相应地提出了几种对ABS的其它控制方法并加以探讨,其中着重论述了ABS门限值控制算法中参考车速的确定方法和基于附着系数的控制算法。