A new model for transformer saturation characteristics by includinghysteresis loops

A simplified analytical expression in polynomial form to determine the transformer saturation and hysteresis characteristics without field test data is presented. Higher-order approximations are simulated for comparison with transformers of various capacities. The results are compared with experiments and simulations and show very good agreement. It is possible to determine accurate transformer saturation and hysteresis characteristics with this simplified procedure     

阳江高本底辐射地区流行病学研究概述(1986～2004年阶段)

高本底辐射研究组（中国）从1972年起在广东省阳江市高本底辐射地区进行居民健康调查和流行病学研究。本文是1986～2004年研究阶段的概述：简要地报道了环境辐射的测量和个人剂量估算、癌症死亡率的研究、非癌疾病死亡率的研究、稳定性染色体畸变频率和非稳定性畸变频率研究；对研究结果中发现的两个重要问题作了讨论。1991～2004年阶段的工作是研究组与日本国京都体质研究会合作完成的。本阶段国内完成单位是：中国疾病预防控制中心辐射防护与核安全医学所、广东省职业病防治院和湖南省劳动卫生职业病防治所。     

油田采出水过滤技术研究进展

综合评述油田过滤器的特点、工作原理及过滤介质的截污过程,介绍几种油田常用过滤器并对其进行比较和分析,并探讨滤料污染后的清洗再生及废弃滤料的环境行为.过滤的好坏直接关系到回注水质,是一项难度极大的技术课题.     

一种基于模糊集的医学图像增强方法

鉴于医学超声图像的对比度较差，使得某些图像细节难以辨认，采取基于小波包和模糊集的图像增强方法。结果表明，此增强方法能够增强图像微小细节，提高图像对比度，改善图像的视觉效果，从而提高诊断的准确性。     

在民居密集区创建绿色环保工程的实践

以在闹市中心开建的上海轨道交通10号线马当路站工程为例，介绍施工单位为创建绿色工地所做的一系列工作，总结了工程中节能环保、创和谐社区的一些经验，可类似工程借鉴。     

第二套常减压装置低温热回收技术的应用

常减压装置低温余热较多.利用较少,造成热量损失。利用初顶油气、稳定石脑油等低温余热加热除盐水建立热水站,在节汽、节电等方面取得了较好的效果。     

Density of Carier in YBCO Superconductors with (Ca,Th) Doping

ＩｔｈａｓｂｅｎｗｅｌｋｎｏｗｎｔｈａｔｓｏｍｅｌａｎｔｈａｎｉｄｅｓｃａｎｒｅｐｌａｃｅｙｔｒｉｕｍｉｎＹＢＣＯｓｕｐｅｒｃｏｎｄｕｃｔｏｒｓｗｉｔｈｏｕｔａｐｐｒｅｃｉａｂｌｅｃｈａｎｇｉｎｇｔｈｅｔｒａｎｓｉｔｉｏｎｔｅｍｐｅｒａｔｕｒｅ．Ｎ...     

High Temperature Solid Oxide Fuel Cells(SOFC)

The history and the state of the art of solid oxide fuel cells(SOFC)is reviewed in this paper.Itdescribes mainly on the material selection,structure design and technological economics of SOFC.The appli-cation of great amount of rare earth materials in SOFC may well extend the market potential of rare earthmaterials in the world.A research project to be carried out as early as possible in China on the SOFC tech-nology will be far-reaching.     

蛋白质与原卟啉Ⅸ及复合物发光机理探讨

对原卟啉Ⅸ（ＰｒｏｔｏｐｏｒｐｈｙｒｉｎⅨ）与蛋白质结合物的吸收、荧光的激发、发射光谱等的研究，表明了在光作用下，其可见区发光（λｍａｘ６３５ｎｍ左右）与卟啉有关，而紫外区发光（λｍａｘ４２２ｎｍ左右）与蛋白质的色氨酸残基有关，其光谱特性与临床诊断选择的癌固有荧光特征峰基本相符。该研究结果为探讨癌的发光机理积累了有益资料．     

High-level synthesis design flow for power side-channel security

The lack of efficient security guidance is a prominent problem in the design flow of high-level synthesis. To tackle this issue, this paper proposes a security-based high-level synthesis design flow featuring the power side-channel vulnerabilities. The side-channel leakage is quantified by establishing a secure component module library, a more efficient and secure parallel scheduling mechanism is generated by optimizing the control flow, and a more secure architecture of the storage system is achieved by optimizing the data flow. The goal is to perform tradeoffs between performance and security, reducing the side-channel risks at the early stage of design and simultaneously generating more secure and efficient cryptographic cores in hardware. Furthermore, the proposed HLS design flow is verified on a field programmable gate array platform. Experimental results show that, in comparison with the traditional design flow, this method reduces the resources by 72% and the clock cycles by 70% and increases the throughput by 88%, and that it can lower the power side-channel risks within an ongoing design to the greatest extent.