中国烟草种质资源网络信息系统的开发

为促进中国烟草种质资源的共享与应用,研究开发了基于B/S（browser/server）架构和ASP.NET技术的中国烟草种质资源网络信息系统。数据库采用了Microsoft SQL Server,服务器端程序集应用C#语言开发,浏览器端基于XHTML + JavaScript。系统在特性数据库和共性数据库两个底层数据库的基础上,实现了种质数据查询、核心种质查询、种质图像查询、共性数据查询和烟草种质共享等5种功能。该系统突破了长期以来种质资源信息、数据、实物集中于一处,难以共享的局面,促进了种质资源的广泛应用和深入发展。     

农业网络图片版权保护方法与策略

网上传播的图片由于极易复制修改而存在大量的盗版和侵权现象,已造成农业领域中网络原创图片和高质量图片显著减少,影响农业图片信息正常的共享利用。文章在综合比较分析了醒目图像水印、数字图像水印、图片元数据、图片禁复制、图片禁搜索、图片浏览器等图片版权保护方法的优缺点的基础上．提出了农业网络图片版权保护策略,可应对图片复制、修改、下载、截图等盗用方法,促进农业网络图片的合法传播和利用。     

农业院校人才视图管理系统关键技术研究

针对目前农业院校高校人才测评系统的不足,构建基于Web的人才视图管理系统,并对系统如何与一卡通对接、安全浏览器的研发、快速数据处理和数据视图显视等关键技术进行了系统阐述。     

The effect of fructose supplementation on feed intake,nutrient digestibility and digesta retention time in Reeves’s muntjac (Muntiacus reevesi)

The aim of the study was to determine the effect of fructose supplementation in the diet on feed intake, nutrient digestibility and digesta retention time in Reeves's muntjac (Muntiacus reevesi), a browsing cervid. In Experiment 1, six adult males of Reeves's muntjac were used in a replicated 3 × 3 Latin square design and fed a diet consisting of dehydrated chopped lucerne (ad libitum), high‐fibre pellet (120 g/day) and wheat bran (30 g/day) without (F0) or with addition of 12 and 24 g fructose/day (F12 and F24, respectively). In Experiment 2, the same six adult muntjacs were used in crossover design and fed F0 or F12. Doses of supplemental fructose were set to increase intake of water‐soluble carbohydrates (WSC; ≈40 g/day; ≈8% of WSC in consumed dry matter [DM]) by 25 and 50% relative to F0. Feed intake was controlled daily (Experiment 1 and 2) and total tract digestibility and digesta retention time were determined (Experiment 2). In Experiment 1, DM intake of chopped dehydrated lucerne decreased with fructose supplementation (F0 vs. F12 and F24; p = .01) but was not different between F12 and F24 (p = .76). Total DM intake was also not different between treatments (p ≥ .13). In Experiment 2, DM intake of lucerne, total DM intake and nutrient digestibility was not affected by fructose supplementation (p ≥ .17), but mean retention time of long particles in the whole GIT tended to be longer for F12 compared to F0 (p = .09). Under conditions of the current study, additional fructose intake (resulting in a range of WSC content in consumed DM from 8.6% to 13%) had only minor impact on feed intake and investigated functions of the gastrointestinal tract of Reeves's muntjac.     

Digestion coefficients achieved by the black rhinoceros (Diceros bicornis), a large browsing hindgut fermenter

In contrast to the grazing white (C. simum) and Indian (R. unicornis) rhinoceros, the black rhinoceros (D. bicornis) is an exclusive browser. Due to the particular fermentation characteristics of browse, one would expect browsers to display both shorter ingesta retention times and lower digestion coefficients on comparable diets than grazers. In order to generate a database to test this hypothesis, we performed digestibility studies in eight black rhinoceroses (D. bicornis) from three zoological institutions, using total faecal collection for the quantification of faecal output. One to three regularly fed zoo rations of roughage, concentrates and varying proportions of browse material were used per animal. Additional data was taken from three hitherto unpublished studies as well as several published sources. When compared with horses on similar rations, black rhinoceroses achieved lower digestion coefficients for organic matter and CF. In general, an increase in dietary CF content led to a steeper decrease in organic matter and GE digestibility in black rhinoceroses than in horses. When comparing available data for rhinoceroses, browsing species showed a steeper decrease in organic matter digestibility than grazing species with increasing dietary cell wall content. Endogenous losses as determined by linear regression analysis were within the range reported for horses and Indian rhinoceroses. The results suggest that the horse is not a useful model animal for evaluating diets for black rhinoceroses energetically. In general, diets fed to captive black rhinoceroses seem to include higher proportions of concentrates than diets for other rhinoceros species, and an increase in browse or roughage would reduce digestion coefficients to levels observed in animals fed natural forage.     

Dry matter and digesta particle size gradients along the goat digestive tract on grass and browse diets

Physical properties of the digesta vary along the ruminant digestive tract. They also vary within the forestomach, leading to varying degrees of rumen contents stratification in ‘moose‐type’ (browsing) and ‘cattle‐type’ (intermediate and grazing) ruminants. We investigated the dry matter concentration (DM) and the mean digesta particle size (MPS) within the forestomach and along the digestive tract in 10 goats fed grass hay or dried browse after a standardized 12‐h fast, euthanasia and freezing in the natural position. In all animals, irrespective of diet, DM showed a peak in the omasum and an increase from caecum via colon towards the faeces and a decrease in MPS between the reticulum and the omasum. Both patterns are typical for ruminants in general. In the forestomach, there was little systematic difference between more cranial and more caudal locations (‘horizontal stratification’), with the possible exception of large particle segregation in the dorsal rumen blindsac on the grass diet. In contrast, the typical (vertical) contents stratification was evident for DM (with drier contents dorsally) and, to a lower degree, for MPS (with larger particles dorsally). Although evident in both groups, this stratification was more pronounced on the grass diet. The results support the interpretation that differences in rumen contents stratification between ruminants are mainly an effect of species‐specific physiology, but can be enhanced due to the diet consumed.     

基于B/S结构的上机考试系统

基于B／S结构的上机考试系统,具有发布简单,运行简单等特点。本文择要介绍了上机考试系统的设计思想、系统构成、实现方法等内容。     

信息网络客户端安全方案的研究

提出了一种信息网络客户端的安全保障方案，以浏览器为例，它对进出浏览器数据进行实时监控，并在此基础上，进行移动代码的行为监控。2种方法共同协作，在浏览器外围和内部2个层次，保障了客户端的安全。     

基于Intranet的企业培训系统结构

企业基于Intranet Web的开放式技术搭建的集职业培训内容、培训方式及培训管理于一体的综合性多媒体网络培训系统支撑平台,是一个交互、开放、易用的Intranet环境,能最大限度地调动学习者的主动性、积极性,提高培训效率,增强企业培训能力,提高企业培训管理水平。