变频式自动真空滤油机在电网中的应用

分析了用于高压电网的变电设备尤其是进口设备的发展趋势 ,列举了二滩电网大溪沟电站变压器真空注油实例 ,以及台湾电力公司真空注油设备的控制系统原理 ,阐述了三级真空、全自动、变频技术在国际上的应用趋势和优点     

PTCR生产过程烧结方式的研究

以程控交换机过流保护用高性能PTCR陶瓷元件为研究对象,得到了应用箱式炉提高PTCR元件产品产量和合格率的烧结方式,通过改变坯片在烧结炉中的位置和摆片方式,得到一种有效的烧结模式,以保证PTCR材料的性能参数,提高产量和合格率。     

深层搅拌桩-钻孔灌注桩组合支护结构设计施工

通过某工程实例介绍深层搅拌桩－钻孔灌注桩组合式支护结构的设计和施工,包括围护方 案的确定、力学模型的建立及受力分析、深层搅拌桩及钻孔灌注桩挡土墙的设计与计算方法、施工 及监测问题等,最后谈了对基坑支护结构设计及施工的一些体会。     

水平向排水加固吹填软粘土地基的研究

本文提出加固吹填软粘土地基的新方法－水平向排水加固。基于Ｔｅｒｚａｇｈｉ－Ｒｅｎｄｕｌｉｃ准固结理论,采用Ｐ－Ｒ交替方向隐格式有限差分法进行数值解,并分析吹填区外水位变化及排水通道自身阻力对固结构的影响。通过一个算例的计算分析,说明新方法是有效的、可行的。     

盾构法隧道防水堵漏技术

分析隧道渗漏水的机理,总结国内外盾构法隧道防水堵漏的技术方法,并结合上海地铁二号线东昌路－东方路区间隧道施工堵漏,提出了防渗堵漏的技术措施。     

填海区采用强夯处理抛石地基建成大型储罐

本文介绍采用中等能量级的强夯,处理抛石填海地基上建造５ 万ｍ ３ 大型储罐,经４～５ 年的长期监测,基础沉降和倾斜均满足了生产使用的要求。     

碳酸钙对聚合物纤维及薄膜的填充改性

介绍了碳酸钙(CaCO3)的填充改性的特点及其改性方法;详述了CaCO3在聚合物纤维、无纺布和薄膜中的应用;探讨了纤维、无纺布及薄膜用CaCO3的要求,CaCO3填充母粒的制备方法及其填充工艺流程。指出应选择CaCO3的粒度及其分布,选用合适的偶联剂和分散剂,才能制备出与基体树脂相容性好的填充母料。     

Influence of silica fume on the desiccation cracks of compacted clayey soils

Clayey soils containing smectites are widely used for construction of liner and cover systems to reduce the hydraulic conductivity in geotechnical applications because of their low permeability and high cation exchange capacity. However, the compacted clayey soils crack on drying because of their high swelling potential, and their hydraulic conductivities increase. To solve this problem, it is essential to stabilize the clayey soils using additive materials. The aim of this study is to examine the suitability of silica fume as a stabilization material to reduce the development of desiccation cracks in compacted clayey liner and cover systems. Natural clayey soil and clayey soil–silica fume mixtures were compacted at the optimum moisture content and subjected to laboratory tests. The results show that silica fume decreases the development of desiccation cracks on the surface of compacted samples. We concluded that silica fume waste material can be successfully used to reduce the development of desiccation cracks in compacted clayey liner and cover systems.     

液氨充装系统的改造

介绍了液氨充装系统改造情况,取得了较好的效果。     

Improving NIRS predictions of ingredient composition in compound feedingstuffs using Bayesian non-parametric calibrations

The selection of an appropriate algorithm for modelling the relationship between spectral and reference data is one of the factors that influence the accuracy of predictions using near infrared (NIR) spectroscopy. For the prediction of ingredient composition in compound feeds, several modelling approaches, both linear and non-linear, have shown the possibilities of NIR technology although with some limitations. The present work evaluates the use of Bayesian non-parametric calibrations for the prediction of 26 ingredients, with different nature, distribution and behaviour. One advantage of this approach is that it avoids the bias towards the mean of the reference data that is not appropriate for the non-Gaussian data distributions of the ingredients of compound feeds. Another is the provision of confidence intervals that quantify the uncertainty in individual predictions. These confidence intervals were used in the tuning process, to help avoid over fitting. The results obtained with the Bayes method for most of the ingredients were similar to those obtained by local regression, both methods improving on the linear approach by around 50%. However, unlike the local regression, the Bayes approach predicted all samples and moreover provided prediction intervals that appear to be very realistic for this dataset.