Miniaturized volume holographic optical data storage and correlation system with a storage density of 10 Gb／cm^3

The general idea of holographic optical data storage (HODS) is briefly introduced. Based on the recent advances of HODS, the key techniques and the challenges of HODS are discussed. Some new techniques are proposed to improve the system. A miniaturized volume holographic data storage and correlation system is presented. It can achieve a density of 10 Gb/cm^3 and a fast correlation recognition rate of more than 2000 images per second. It shows the attracting potential advantages over other conventional storage methods in the information storage as well as information processing.     

Intersections of two offset parametric surfaces based on topology analysis

Conventional methods for solving intersections between two offset parametric surfaces often include iteratively using computationally expensive SSI (surface/surface intersections) algorithm. In addition, these methods ignore the relations between the intersection curves of parametric surfaces with different offset distances. The algorithm presented in this paper, makes full use of the topological relations between different intersection loops and calculates intersection loops with the help of previously calculated intersection loops. It first pre-processes two parametric surfaces to obtain the characteristic points, called topology transition points (TTPs), which can help in the subsequent finding of the topologies of the intersection curves. Then these points are categorized into several distinct groups, and we can determine the calculation strategy for searching initial points by analyzing the properties of these TTPs on the surfaces. Hence, all intersection curves can be marched from initial points by the tracing algorithm. The proposed algorithm could calculate intersection curves robustly and effectively, and has been tested to be capable of overcoming the degenerate conditions such as loop and singularities leaking that occur frequently in conventional algorithms.     

Distributed collaborative CAD system based on Web Service

This paper presents a novel Web Service based distributed collaborative CAD system employing feature as its collaborative design element and uses XML to define feature operations and communication protocol between the server and the client. To reduce network load and increase response ability of the system, the feature information is updated incrementally on the client. The system supports collaborative designing on heterogeneous platforms. Its framework and communication protocols are analyzed in detail. The experimental results from the developed prototype system showed that it can effectively support collaborative design under the distributed environment.     

Grove Mountains （GRV）99027： A new Martian meteorite

We report the petrography, mineral chemistry and oxygen isotopic composition of GRV 99027, a new Martian meteorite recently collected during the 16th Chinese Antarctic Research Expedition. This meteorite consists of two textural regions. The interstitial region is characterized by the presence of plagioclase and phosphate, and higher FeO contents of olivine and orthopyroxene, in comparison with the poikilitic region. All of the observations are similar to the three known Martian lherzolites. We classify GRV 99027 as the fourth sample of Martian lherzolite.     

粘钢加固RC梁的锚固剪应力参数分析

在弹性理论的基础上,利用钢板固剪应力计算公式,对在集中荷载或均布荷载作用下采用粘钢加固的混凝土梁,风板锚固最大剪应力的有关影响因素。     

燃料电池系统热管理子系统建模与温度控制

燃料电池电堆的温度分布对燃料电池的安全与寿命有重要影响。该文分析了车用质子交换膜燃料电池系统热管理子系统的结构,并建立热管理子系统的动态模型。在此基础上对燃料电池温度控制算法进行研究,针对热管理子系统大惯性和大迟延的特点,设计了基于预测的智能P ID算法。该算法采用简化的热管理子系统模型预测电堆温度变化趋势并进行提前控制,能显著减小超调。试验结果表明,该算法能实现±0.5℃的控制精度,控制效果良好。     

透明微穿孔膜构造的吸声性能测量

为了研究微穿孔膜墙面吸声结构和空间吸声体的声学特性，在混响室中对8组墙面吸声体与7组空间吸声体的宽频带吸声系数进行了测量，以探讨吸声体的构造与其声学特性之间的关系．测量数据表明，微穿孔膜墙面吸声构造和空间吸声体具有良好的声学性能．该测量数据可以直接应用于实际声学工程，也可以用来与理论计算进行比较研究．     

中国居民生活方式和能耗关系的研究

近年来，随着经济的快速发展和人民生活水平的不断改善，中国居民的生活能耗持续增长．由发达国家和地区的先进经验可知，居住建筑的特点和居民的日常生活方式都对居住建筑能耗有影响．为了清楚了解居住建筑能耗与生活方式之间的关系，开找出4常生活甲有利于节能的措施，笔者在2006／2007平4个孕节中各选择一周，对杭州地区100户家庭进行了能耗和生活方式的调查．经过统计分析，发现居民日常生活方式与能耗有密切联系，并找到了一些日常生活中有利于节能的合理措施；而且通过在调查中对居民进行节能教育后，发现居民的节能意识和行为都有一定的改善，并伴随能耗的降低．     

态射的Moore—Penrose逆的构成

给了了有满分解的态射的Ｍｏｏｒｅ－Ｐｅｎｒｏｓｅ逆的结构，并且一般态射给出由它的（１，３）逆和（１，４）逆表的Ｍｏｏｒｅ－Ｐｅｎｒｏｓｅ逆。     

Genetic study on the behavior of honeybees influenced by polyandry system

Within a honeybee population, due to polyandry, there are supersister and halfsister relations, thus many subfamilies exist. For the Chinese honeybee (Apis cerana cerana F.) a phylogenetic dendrogram has been constructed in which 4 subfamilies are clustered based on DNA fingerprint patterns. And it has been observed that each kind of workers is distributed to several dierent sub-families.