Response of rainfed bread and durum wheat to source,level and timing of nitrogen fertilizer on two Ethiopian Vertisols: II. N uptake,recovery and efficiency

In trials conducted at 2 highland Vertisol sites in Ethiopia in 1990 and 1991, 2 locally popular wheat cultivars, 1 spring bread wheat (Triticum aestivum L.) and 1 durum wheat (T. durum Desf.), were supplied with nitrogen (N) fertilizer at 0, 60 and 120 kg N ha^–1 in the form of large granular urea (LGU), standard urea prills or ammonium sulfate. N was applied all at sowing, all at mid-tillering or split-applied between these two stages (1/3:2/3). While durum wheat exhibited the highest N concentration in grain and straw, bread wheat, because of its higher productivity, resulted in a greater grain and total N uptake. In general, split application of N and use of LGU as N source enhanced grain and total N uptake, apparent N recovery and agronomic efficiency of N, particularly under severe water-logging stress. Where significant, the interactions among the experimental factors substantiated the superior responsiveness of the bread wheat cultivar to fertilizer N, and the beneficial effects of split N application and LGU as an N source. Split application of N tended to nullify the positive effects of LGU, presumably by approximating the delayed release of N achieved with LGU. Considering the potential benefits to Ethiopian peasant farmers and consumers, split application of N should be advocated, particularly on water-logged Vertisols; LGU could be an advantageous N source assuming a cost comparable to the conventional N source urea.     

湘潭电厂粉煤灰在建筑工程中的应用

本文首先简述湘潭电厂除、排灰情况，粉煤灰加工工艺和品质，然后较详细地用文字和图表表述该粉煤灰在水工工程、泵送砼工程、路面工程、砂浆及轻质砼中的应用。     

国产脱砷剂及其应用

介绍了石油烃中砷的存在形式 ,石脑油中砷含量及对催化剂的危害 ,分析了脱砷机理 ,阐述了国产脱砷剂的类型、型号、特点 ,以及选用原则与工业应用情况。     

国产MB-86催化剂使用情况分析

抚顺引进的５００００ｔ／ｙ丙烯腈装置要改造到７００００ｔ／ｙ的生产能力，其中更换国产催化剂ＭＢ－８６是较为关键的一步，文章对此进行了总结与分析。     

换网装置技术在塑料挤出成型中的设计与应用

阐述了换网装置在塑料挤出成型中的应用,针对不同类型换网装置的适应性和特点进行了分析与比较；重点介绍了循环式、往复式、凸轮式换网装置的技术及过滤网片的作用。     

有限元法在建筑卫生陶瓷生产中的应用

有限元法是随着计算机技术的应用而发展起来的一种先进的CAE技术，广泛应用于各个领域中的科学计算、设计、分析中，已成为工程设计和分析中的重要工具。本文在有限元法基本原理的基础上，综述了有限元法在建筑卫生陶瓷生产中的应用情况，分析了有限元的优越性。     

EPVC系列旋风管的结构优化研究

介绍了ＥＰＶＣ系列导叶式旋风管的叶片形状、优化的叶片出口参数间的匹配关系以及新的防返混锥排尘结构，总结了无泄料盘时的排尘机理及尺寸设计要点。另外，还简单介绍了旋风管装置的工业应用情况。     

EVA共聚物的性能与应用

EVA共聚物广泛用作电线电缆中的热收缩材料,半导电屏蔽材料和阻燃绝缘材料,本文简要综述EVA共聚物的基本性能。     

高效快速纤维球过滤器的应用

介绍了纤维球过滤器的特点、工作原理及其在脱盐水装置中的应用效果。     

Cloud based intelligent system for delivering health care as a service

The promising potential of cloud computing and its convergence with technologies such as mobile computing, wireless networks, sensor technologies allows for creation and delivery of newer type of cloud services. In this paper, we advocate the use of cloud computing for the creation and management of cloud based health care services. As a representative case study, we design a Cloud Based Intelligent Health Care Service (CBIHCS) that performs real time monitoring of user health data for diagnosis of chronic illness such as diabetes. Advance body sensor components are utilized to gather user specific health data and store in cloud based storage repositories for subsequent analysis and classification. In addition, infrastructure level mechanisms are proposed to provide dynamic resource elasticity for CBIHCS. Experimental results demonstrate that classification accuracy of 92.59% is achieved with our prototype system and the predicted patterns of CPU usage offer better opportunities for adaptive resource elasticity.