接枝变性淀粉浆料的研究现状及进展

介绍了接枝变性淀粉浆料的研究现状,分析了当前接枝变性淀粉浆料研究中存在的优缺点,并剖析研究进展缓慢的原因,指出接枝变性淀粉浆料的研究还存在着诸多不完善之处,需进行系统研究,以促进接枝变性淀粉浆料的发展。     

弱建筑:住在暖昧的空间里——藤本壮介作品解读

"弱建筑"概念的产生是基于建筑设计策略的对象由静止的建筑本身向有著多样可能性的人和事件的转变.随着"之间"关系浮出水面.建筑开始关注空间的不明确性、关联性、双重性和可开发性.     

An integrated model for the design of air-cooled chiller plants for commercial buildings

Cooling load calculation is the first step in designing the air-conditioning system of a building. The calculated cooling capacity with appropriate buffer is then used to select the number and size of chillers in the system. N + 1 is a common formula used by designers to size the chiller plants in Hong Kong buildings, where N is the actual number of chillers required and 1 is a redundant chiller provided to ensure reliability. This paper reviews the problem of excess capacity and discusses the risk exposure of chiller systems without redundant chillers. The cooling load profiles of the chiller plants of four medium-sized commercial buildings in Hong Kong are reviewed. The risk exposure of chiller systems without redundant chillers can be minimized by applying risk-based preventive maintenance. The just-in-demand design reduces capital cost of the building and frees up funds for continuous energy measurement and improving the energy efficiency of chiller plant systems. This paper presents a model for designing chiller plants that improves the energy efficiency of the plant in a cost effective and thoughtful manner. It is designed with consideration of the life cycle of the plant and real-time continuous commissioning, monitoring, measurement, comparison and execution for better energy management.     

应用预湿上浆的实际经验

本文介绍了在浆纱间应用预湿上浆的实际经验。除节约浆料之外，文中还叙述了在织造性能、废水成本降低和成品织物耐磨性等方面的改善情况。     

阳离子松香乳液的制备及其施胶性能

用环氧氯丙烷、三乙胺与松香反应制备了松香型阳离子乳化剂,不需加其他表面活性剂,单独用15%的该乳化剂与本实验室自制的阳离子聚合物乳液作分散剂对松香进行乳化,采用常压逆转法制备了阳离子松香乳液,并对该乳液的施胶性能进行了探讨.     

二辊回转定径机工艺参数的选择

介绍了大冶特殊钢股份有限公司１７０无缝钢管厂二辊回转定径机工艺参数的选择和优化情况。生产实践表明，采用优化后的定径工艺参数，钢管的椭圆度减小，外径精度提高。     

PV array <5 kWp + single inverter = grid connected PV system: Are multiple inverter alternatives economic?

Compared with a single, central inverter, multiple inverter photovoltaic (PV) systems are considered to produce higher system energy yields by reducing mismatch losses within dc strings. This paper considers, from an economic viewpoint, whether multiple inverter systems can ever be justified for PV systems <5 kWp, under the conditions that presently exist in the UK. The UK scenario being one of very high labour costs combined with both relatively low radiation levels and feed in tariffs. Analysis of a 7.2 kWp test façade configured with string and central inverters indicates that the mismatch reductions that can be achieved do not compensate for the additional capital cost of a multiple inverter installation. In addition, unless the mean time to failure of inverters approaches that of the 25 year lifetime of the dc side of the PV system, the economics of small scale grid connected PV in the UK will remain difficult, even when the cost of the PV component falls.     

GradH‐Correction: guaranteed sizing gradation in multi‐patch parametric surface meshing

In this paper a new method, called GradH‐Correction, for the generation of multi‐patch parametric surface meshes with controlled sizing gradation is presented. Such gradation is obtained performing a correction on the size values located on the vertices of the background mesh used to define the control space that governs the meshing process. In the presence of a multi‐patch surface, like shells of BREP solids, the proposed algorithm manages the whole composite surface simultaneously and as a unique entity. Sizing information can spread from a patch to its adjacent ones and the resulting size gradation is independent from the surface partitioning. Theoretical considerations lead to the assertion that, given a parameter λ, after performing a GradH‐Correction of level λ over the control space, the unit mesh constructed using the corrected control space is a mesh of gradation λ in the real space (target space). This means that the length ratio of any two adjacent edges of the mesh is bounded between 1/λ and λ. Numerical results show that meshes generated from corrected control spaces are of high quality and good gradation also when the background mesh has poor quality. However, due to mesh generator imprecision and theoretical limitations, guaranteed gradation is achieved only for the sizing specifications and not for the generated mesh. Copyright © 2004 John Wiley & Sons, Ltd.     

石油树脂生产造纸施胶剂的工艺研究

介绍以石油树脂为原料生产造纸施胶剂的生产工艺,考察了反应温度、反应时间、体系配比等因素对产品性能的影响,确定了反应的最佳反应条件。     

关于电子级玻纤生产技术的探讨

详细阐述了电子级玻璃纤维生产工艺全过程及各工序的生产技术关键问题。