乙烯氧化制环氧乙烷固定床反应器的模拟及稳定性分析

在筛选出合适的乙烯氧化制环氧乙烷动力学方程的基础上,对工业固定床氧化反应器进行一维和二维模型的模拟计算。考察操作工艺参数对反应器稳定性、转化率影响的敏感性以及N_2和CH_4做致稳气时反应温度和转化率的轴向、径向分布。     

烤烟新品种川烟1号的选育及其特征特性

川烟1号（QL-3）是以MS中烟100为母本、云烟85为父本配制的F1代杂交种。该品种植株结构合理,田间长势强,易烘烤;中抗青枯病和赤星病,中感根结线虫病、TMV和PVY,感CMV;其主要经济性状均优于对照品种K326,主要质量性状与对照品种K326相当或略高;烤后原烟多金黄色,上等烟比例高,结构疏松,身份中等,油分有．多,色度中．强,外观品质总体性状优于对照品种K326;化学成分含量适宜、比例协调,与对照品种K326相比,钾含量略高,烟碱、总氮和氯离子含量略低。感官质量档次略高于对照品种K326。川烟1号是一个产量、质量、抗病较能兼顾的烤烟新品种,2012年通过全国烟草品种审定委员会审定。     

多样性与整体性——上海浦东新区少年宫、图书馆设计

着重分析如何在浦东新区行政文化中心区域内把少年宫和图书馆既有机地组合在一个整体的建筑中，又各自独立、自成体系，并探讨了上海地区公共建筑的节能设计。     

Computer configuration for Ontario Hydro's new energy managementsystem

In 1985, Ontario Hydro decided to build a system control center and install an energy management system (EMS). Because hardware was being installed, it provided an opportunity to review the standards of performance demanded of the EMS and technological advances that could be utilized. As a result of this review, more rigorous reliability requirements were defined and a computer configuration designed to satisfy these requirements. The authors discuss the resulting performance standards, examine alternative architectures, and describe the computer architecture finally chosen for the EMS     

A Monte Carlo Approach for the Layout Design of Thermal Fire Detection System

A Monte Carlo approach is developed for the layout design of thermal fire detection system. In contrast to the traditional deterministic approach, the present approach yields not only a specific design for a given objective, but also a probabilistic assessment of the effectiveness of the design which can be used as a basis of comparison for different possible designs. The approach also allows a systematic assessment of the uncertainty in the design process and provides a rational basis for possible design improvements.     

Compensating for the mutual coupling effect in a normal-mode helical antenna array for adaptive ing

A practical normal-mode helical antenna array together with a new method for the compensation of the mutual coupling effect is proposed for the efficient adaptive ing of interferences in a mobile communication environment. The helical antenna array is shown to be able to generate deeper s than an equivalent monopole antenna array in the presence of the mutual coupling effect. The helical antenna elements are smaller in size and less susceptible to the mutual coupling effect than monopole antenna elements. The new method for compensation of the mutual coupling effect is shown to have a greater ability and flexibility than previous methods. A new definition of mutual impedance is introduced and used to find the coupling-free signal voltages across the antenna terminal loads. Numerical examples demonstrate the superior performance of the proposed adaptive array and the new compensation method.     

A 2-bit MONOS nonvolatile memory cell based on asymmetric double gate MOSFET structure

A novel 2-bit/cell nonvolatile memory (NVM) with metal-oxide-nitride-oxide-semiconductor (MONOS) asymmetric double gate (ADG) MOSFET structure is proposed. With the double gate structure, the two conducting channels provide the ability to store 2 bits in a cell. Program and erase can be performed by channel hot electron (CHE) injection and Fowler-Nordheim (FN) tunneling respectively. The read operation and the array structure of the proposed novel NVM are also studied and described in this paper.     

Housing Affordability in Singapore: Can We Move from Public to Private Housing?

With 84 per cent of the Singapore resident population housed in public housing, the ultimate dream for many is to move into private housing, which is generally considered to offer better quality and more exclusive living. This article is concerned with the enabling factors of affordability in housing mobility. It examines the Singapore public housing homeowners' affordability of private housing, suggesting a measure of that affordability. The survey findings indicate that only a small percentage of public homeowners can afford to move to median-priced private apartments. The number is even smaller for the relatively more expensive landed housing with own garden. On a theoretical level, the study demonstrates that the use of multiple methods to measure housing affordability is beneficial as more affordability determinants are included in the measurement.     

Study of the factors influencing colour yield of an ink-jet printed cotton fabric

In this study, the factors influencing the final colour yield of an ink-jet printed cotton fabric were investigated. The factors included the content of the pretreatment paste (the amounts of sodium alginate, sodium bicarbonate and urea) and the steaming time. Four different inks – cyan, magenta, yellow and black – were used in this study and the influences of these factors on the four different colours were studied through experimental design. The results showed that apart from the influence of individual factors, the final colour yield also depended on the interaction effect of the factors.