机载干涉合成孔径雷达定标中的定标器布放

敏感度矩阵的条件数是影响干涉合成孔径雷达(InSAR)定标性能的重要因素。该文在InSAR定标理论的丛础上,给出了定标器的布放规则,导出了定标器布放的约束条件,提出了使敏感度矩阵条件数极小化的定标器布放算法。理论分析和计算结果表明,应用该算法进行定标器布放,可以使敏感度矩阵的条件数达到最小。

Guaranteed cost sampled-data control for uncertain nonlinear time-varying delay system

The robust guaranteed cost sampled-data control was studied for a class of uncertain nonlinear systems with time-varying delay. The parameter uncertainties are time-varying norm-bounded and appear in both the state and the input control matrices. By applying an input delay approach, the system was transformed into a continuous time-delay system. Attention was focused on the design of a robust guaranteed cost sampled-data control law which guarantees that the closed-loop system is asymptotically stable and the quadratic performance index is less than a certain bound for all admissible uncertainties. By applying Lyapunov stability theory, the theorems were derived to provide sufficient conditions for the existence of robust guaranteed cost sampled-data control law in the form of linear matrix inequalities (LMIs), especially an optimal state-feedback guaranteed cost sampled-data control law which ensures the minimization of the guaranteed cost was given. The effectiveness of the proposed method was illustrated by a simulation example with the asymptotically stable curves of system state under the initial condition of x(0)=[0.679 6 0].

A new method of characterizing equivalent strain for equal channel angular processing

In order to establish the quantitative relationship between equivalent strain and the performance index of the deformed material within the range of certain passes for equal channel angular processing （ECAP）, a new approach to characterize the equivalent strain was proposed. The results show that there exists better accordance between mechanical property （such as hardness or strength） and equivalent strain after rolling and ECAP in a certain range of deformation amount, and Gauss equation can be satisfied among the equivalent strain and the mechanical properties for ECAP. Through regression analysis on the data of hardness and strength after the deformation, a more generalized expression of equivalent strain for ECAP is proposed as：ε=k0exp[-（k1M-k2）^2], where M is the strength or hardness of the material, k1 is the modified coefficient （k1∈ （0, 1））, ko and k2 are two parameters dependent on the critical strain and mechanical property that reaches saturation state for the material, respectively. In this expression the equivalent strain for ECAP is characterized novelly through the mechanical parameter relating to material property rather than the classical geometry equation.

Exploring Enterprise Performance Indicators Network： A Case Study of China Telecommunication Industry

Perforrmnce indicators play some important roles in enterprise operation. Both researchers and managers have recently pointed out that the identification of correlation between different performmance indicators may lead to a better understanding of business. However, it is becoming more and more difficult to measure and analyze these indicators since the fast growing number of performance indicators and the complex relationships between them The existing categories failed to reflect these changes in an adequate way, and the quantitative analysis methods for identifying the characters of those pefformance indicators are still worthy of investigation. The main objective of this paper is to propose a practical methodology for managing and analyzing performance indicators in enterprises, which focuses on building up a performance indicator system and discovering the characters of those performance indicators by applying complex network methods. The empirical results of a telecommunieation enterprise show that the proposed method can be effective in understanding the correlations between performance indicators.

航天成像光谱仪CHRIS辐射与光谱性能评价

CHRIS是欧空局于2001年10月成功发射的PROBA卫星上搭载的探索性高光谱遥感器,它共有5种可选择的作业模式,在可见光到近红外(0.4～1.05μm)范围,最多可以获取62个波段.文中采用基于图像自身的大气校正方法(模型法ACORN和经验法),在图像上选取最具代表性的植被和土壤光谱,对CHRIS这一新型的航天成像光谱仪进行了光谱与辐射性能评价.计算显示,ACORN校正得到的玉米反射率在498～750nm波长区间能够较好地表征植被的反射率光谱特征(如红边特征),尤其是在对气溶胶敏感的蓝光部分比经验方法更有优势,但是在750nm之后就有很大偏差,表明CHRIS在750nm之后的波段存在光谱定标误差;土壤光谱反射率在800nm之后有递减的误差趋势,表明CHRIS在部分波长区间还不能满足模型法大气校正的要求;ACORN反演得到的水汽含量分布图上存在的竖条纹,则表明CHRIS的辐射定标性能的不足.CHRIS仪器作为欧空局第一个真正意义上的航天高光谱遥感器在光谱和辐射性能上仍有待改善.

The Contribution of Accounting for the Definition of Performance Indicators： The Case of Higher Education Institutions

The influence of the New Public Management （NPM） principles in Portuguese Public Administration, particularly in higher education, has led these institutions on a path of adaptation of structures and systems in order to improve their decision-making processes. Public organizations must, at the present, to consider the strategic issues that are of vitally importance to their survival. In this context, the Balanced Scorecard （BSC）, due to its intrinsic characteristics, is presented as value added in attempts to link the set of objectives with the corporate strategy; determining, a priori, a course of action that must be constantly monitored. Our research analyzes the issues underlining the development of a model of performance management based on the BSC and formatted to a higher education institution （HEI）. The analysis of the results confirms the viability of applying an evaluation model constructed within a specific framework. In addition, the analysis attests the importance of performance indicators in this model of evaluation, specifically those of accounting, and consequently, the added contribution they can make in the process of decision-making within HEI, particularly, in current times when the priority is to achieve more with fewer resources.

Determination of Physiological Biochemical Parameters and Reproductive Performance in Transgenic sFat-1 Gene Pigs

[Objective] The aim was to evaluate the health of transgenic sFat-1 gene pigs in order to provide a reference for the breeding selection of pig excellent individuals. [Method] 15 physiological biochemical parameters and reproductive performances of 21 negative control pigs and 20 transgenic sFat-1 gene pigs were determined. [Result] The liver functions of some transgenic sFat-1 gene pigs were hurted lightly,and the reproductive performance also decreased lightly. [Conclusion] The determination of physiological biochemical parameters and reproductive performance in transgenic pigs could be taken as one of effective methods in environmental safety evaluation of transgenic pigs.

Ideas, properties, and standards of fracture repositioning with osteopathy in traditional Mongolian medicine in China

OBJECTIVE: To explore the unique ideas, properties, and standards of fracture repositioning with osteopathy in traditional Mongolian medicine in China.METHODS: Based on the natural life concept of "integration of universe and man," osteopathy in traditional Mongolian medicine in China uses the modern principles and methods of physiology, psychol-ogy, and biomechanics. Against this background,we explored the unique ideas, properties, and standards of fracture repositioning in traditional Mongolian medicine.RESULTS: Fracture treatment with osteopathy in traditional Mongolian medicine in China is based on(a) the ideas of natural, sealed, self and dynamic repositioning of fractures;(b) the properties of structural continuity and functional completeness;(c) the standards of "integration of movement and stillness" and "force to force." CONCLUSION: The unique ideas, properties, and standards of fracture repositioning with osteopathy in traditional Mongolian medicine in China have resulted in the widespread use of such techniques and represents the future direction of the development of fracture repositioning.