一种高效可控恒流源

提出了一个设计高效可控恒流源方案.首先分析了影响其效率的各种因素,提出了提高效率的途径和方法.其次又给出应用微机实现双回路的测控方法及数学模型,该方案已成功的应用于某些专用设备中.     

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.     

Effects of Heat Treatment on the Transformation Temperature and the Microstructure of Ni-Ti-Nb Shape Memory Alloy

The effects of heat treatment on the phase transformation temperature and the microstructure of Ni-Ti-Nb alloy have been investigated by means of R-T method, TEM and EPMA. With the increase of annealing temperature, cooling rate and ageing temperature, the Ms temperature increases. TEM observations show no new precipitated phase was found in the B2 parent phase after heat treatment, but EPMA shows the content of Ni (or Ni/Ti ratio) in the B2 matrix changed. The main reason for the change of transformation temperature lies in the change of the matrix composition (or Ni/Ti ratio) with the variation of heat treatment procedure.     

低温等离子体对天然胶原材料表面改性的研究

采用牛腱中提取的胶原蛋白为原料，制成薄膜试样，在Ｏ２和Ａｒ条件下，用低温等离子体处理天然胶原薄膜的表面．处理后的试样通过电子光谱（ＥＳＣＡ），红外光谱（ＩＲ），Ｘ射线衍射和接触角测量来研究其结构和性能的变化．实验表明：处理后胶原材料的表面、内部结构及化学成分都发生了明显的变化；它与水和二碘甲烷的接触角明显小于等离子处理前的可见低温等离子体方法能用于胶原材料的改性．     

Input saturation and global stabilization of nonlinear systems viastate and output feedback

For multi-input multi-output nonlinear systems whose free dynamics are Lyapunov stable, the author shows how the problem of global stabilization via dynamic output feedback can be solved by using the technique of input saturation. The power of this technique is also illustrated by solving the problem of global stabilization via bounded state feedback for affine nonlinear systems with stable unforced dynamics. Analogous results are established for discrete-time nonlinear systems