基于COM／DCOM技术的Web GIS构建方法应用

万维网地理信息系统（Web GIS）是地理信息系统（GIS）发展的一个重要方向，它具有访问范围广、平台独立性高、系统成本低且操作简单等特点。本文在介绍组件对象模型，分布式组件对象模型（COM／DCOM）技术的基础上，结合Web GIS开发中可能遇到的瓶颈，把二者结合，将一个基于组件的四层开发模型进行应用，解决系统在物理以及逻辑上的独立，为Web GIS中存在的安全、通信速率及GIS应用二次开发等难题的解决提出新方案，以达到Web GIS开发的时间和效益的双结合。     

安徽省木兰科植物的分布及其在城市园林中的应用

介绍了安徽省木兰科植物的地理分布概况，对其在合肥、芜湖、马鞍山城市园林中的应用进行了调查，发现目前应用的仅有荷花玉兰、紫玉兰、白玉兰、含笑等少数树种，具有很大的园林应用发展空间，并由此提出了木兰科植物推广应用的建议。     

荔枝树体N素分布及累积特点

采用整株枝解法,在采果后把9a生成年妃子笑和黑叶、3a生幼年妃子笑荔枝的根、木质部、皮部、叶、复叶柄5个器官分成14～16个部位,测定各个部位各个器官的N含量。结果表明,1)N在不同器官和不同部位含量是不同的。N含量在叶片最高,在根颈、主茎木质部、主根含量较低;在同级枝根中,皮部N含量显著高于木质部;荔枝枝干和根系,随着其粗度增加,其N含量基本上呈下降趋势,但成年树下降幅度比幼年树的大。2)成龄妃子笑与黑叶各部位各器官N含量没有显著差异,但成年树叶、复叶柄、末级侧枝皮部、木质部N含量高于幼年树相应部位相应器官N含量。3)荔枝N素累积在叶片最多,其次为枝干,根系N累积量较少,末级侧枝N素累积量占整株树N素累积量50%以上。     

乳的合成过程及其在生产中的应用技术

乳脂、乳蛋白和乳糖是牛奶中的主要营养成分，也是影响牛奶品质的主要因素，通过营养调控途径可以有效改善牛奶中的乳脂率、乳蛋白率和乳糖含量，本文阐述了牛奶中乳脂、乳蛋白和乳糖三大营养物质的合成过程、作用机理以及生产中的实践应用技术。     

住宅小区景观规划中几个要点的实践与研究

随着社会经济的发展和人们生活水平的提高,人们对居住生活环境质量要求也越来越高,如何为人们提供一个安全舒适、健康、和谐、高效并具有良好景观效果的居住空间是景观设计师在做规划设计时首要解决的问题。     

C/N ratio control and substrate addition for periphyton development jointly enhance freshwater prawn Macrobrachium rosenbergii production in ponds

The present research investigated the effect of carbon/nitrogen ratio (C/N ratio) control in ponds with or without substrate addition for periphyton development on production of giant freshwater prawn. C/N ratios of 10, 15 and 20 were investigated in 40 m^− 2 ponds stocked with 2 prawn juveniles (5.023 ± 0.02 g) m^− 2 with or without added substrates for periphyton development. The various treatment combinations of C/N ratio and periphyton substrate addition are abbreviated as ‘CN10’, ‘CN15’, ‘CN20’, ‘CN10 + P’, ‘CN15 + P’ and ‘CN20 + P’, P representing periphyton substrate. A locally formulated and prepared feed containing 30% crude protein with C/N ratio10 was applied. Tapioca starch was used as carbohydrate source for manipulating C/N ratio and applied to the water column separately from the feed. Increasing the C/N ratio from 10 to 20 reduced (P < 0.001) the total ammonia-nitrogen (TAN), nitrite–nitrogen (NO₂–N) and nitrate–nitrogen (NO₃–N) in water column and total Kjeldahl nitrogen (TKN) in sediment. The addition of substrates only influenced the NO₂–N concentration in the water column (P < 0.001). Increasing the C/N ratio raised the total heterotrophic bacterial (THB) population in the water column, sediment and periphyton (P < 0.001). It also increased the dry matter (DM), ash free dry matter (AFDM), and chlorophyll a content of periphyton (P < 0.001). The lowest specific growth rate (SGR), the highest food conversion ratio (FCR), and the lowest protein efficiency ratio (PER) were recorded in treatment CN10 (P < 0.05). The addition of substrates did not influence size at harvest (P > 0.05) but improved the survival from 62.8 to 72% (P < 0.001). Increasing the C/N ratio from 10 to 20 increased the net yield by 40% and addition of substrate increased the net yield by 23%. The combination of C/N ratio control and substrate addition increased the net yield by 75% from 309 (CN10) to 540 (CN20 + P) kg ha^− 1 (120 days)^− 1. This 75% higher production concurred with (1) a lower inorganic nitrogen content in the water column, (2) a higher THB abundance supplying additional single cell protein to augment the prawn production, and (3) an improved periphyton productivity and quality.     

施肥量与玉米籽粒含油率的相关性研究

为了更好地在山西省开展高油玉米的育种工作,为发展高油玉米生产提供理论依据,对引进的运高油1号玉米杂交种进行试种和观察,结果表明：施肥量与籽粒的含油率呈不显著的负相关关系。     

女子沙滩排球垫球调整在比赛中的运用对比分析

通过文献资料法、录像统计法、观察分析法，以部分世界女子沙滩排球巡回赛、全国女子沙滩排球巡回赛为研究对象，对沙滩排球垫球调整技术在比赛中的运用进行研究分析。认为沙滩排球比赛受自然环境的影响和规则的限制，传球调整容易造成持球和连击，而我国沙滩排球队伍仍然更多采用传球调整技术。重视垫球调整是提高我国沙滩排球技战术水平与世界接轨的发展趋势，也是适应自然条件和适应规则的有效措施。     

Morphogenetic Effects of Different Mineral N-compounds on Roots of Maize (Zea mays L.), Spring Barley (Hordeum vulgare L.) and Broad Bean (Vicia faba L.)

Plants of maize ( Zea mays L.), spring barley ( Hordeum vulgare L.) and broad bean ( Vicia faba L.) were raised in tubes filled with a soil-sand mixture and supplied with nutrient solution. The nutrient supply was varied with regard to concentration and typ of compound of "N". Due to the relatively high concentrations of "N", dry matter of shoots and roots was reduced in comparison to the control; root morphology was affected in terms of root length and root thickness. The N-compounds, used in the experiment, exerted quantitatively different influences on dry matter production and root morphology, NH₄NO₃ being the N-form which had the weakest detrimental effects. There was no specific response to NH⁺₄ or NO⁻₃ but a strong influence could be shown for NH₄Cl and N_aNO₃. Probably not only the concentration of "N" and the form of "N" have a specific influence, but also the cations and anions associated with the N-containing ion are effective.     

VR技术在建筑设计中的应用

介绍了VR技术的概念以及在建筑设计领域的应用情况、建筑设计中虚拟建筑物的虚拟场景建模的方法；场景渲染时把整个场景分解为可直接在物理内存中完成渲染的若干组，分组进行渲染的方法；拟摄影机设置、运动速度控制以及虚拟观察者各种动作的模拟（步行、旋转及其它动作）、建筑物的虚拟漫游等，同时结合建筑设计的工程实例，探讨虚拟现实技术在建筑设计领域的发展前景。