Optimal parity vector sensitive to designated sensor fault

Based on the parity space construction and the orthogonal constraint condition of parity vector, the approach of fault detection and isolation using optimal parity vector is presented. Its main idea is to design a performance criterion similar to the criterion presented by Zhang and Patton (1993), but most sensitive to the designated sensor's fault and least sensitive to other sensor's fault and unknown inputs such as noise. Through the Monte-Carlo simulation, it is shown that the proposed approach of choosing optimal parity vector greatly increases the ability of fault detection and the effectiveness of fault isolation is better than the generalized likelihood test (GLT) approach     

21世纪的经济—知识经济

本文从２１世纪知识经济发展既是机遇又是挑战的角度，分析了知识经济的兴起，阐明 诉概念和知识经济的特点，最后简术字我们的对策。     

China Academy of Launch Vehicle Technology

OVERVIEW China Academy of Launch Vehicle Technology (CALT) was founded on November 16, 1957. It was the first research unit devoted to the development of launch vehicles     

Cycle slip detection using multi-frequency GPS carrier phase observations: A simulation study

The detection and repair of the cycle slip or gross error is a key step for high precision global positioning system (GPS) carrier phase navigation and positioning due to interruption or unlocking of GPS signal. A number of methods have been developed to detect and repair cycle slips in the last two decades through cycle slip linear combinations of available GPS observations, but such approaches are subject to the changing GPS sampling and complex algorithms. Furthermore, the small cycle slip and gross error cannot be completely repaired or detected if the sampling is quite longer under some special observation conditions, such as Real Time Kinematic (RTK) positioning. With the development of the GPS modernization or Galileo system with three frequencies signals, it may be able to better detect and repair the cycle slip and gross error in the future. In this paper, the cycle slip and gross error of GPS carrier phase data are detected and repaired by using a new combination of the simulated multi-frequency GPS carrier phase data in different conditions. Results show that various real-time cycle slips are completely repaired with a gross error of up to 0.2 cycles.     

角锥棱镜不同方位反射光束的能量分布

推导了入射光束和角锥棱镜处于不同方位时，反射光束的能量计算公式，计算结果表明，当角锥棱，当角锥棱镜处于正常工作状态时，光束垂直弦面入射时的反射光束能量最大，而最小反射光能量趋近于零。     

目标成本管理和作业成本管理集成的成本管理体系结构建立

 回顾了成本管理理论的发展,分析了目标成本管理和作业成本管理的共性和不同之处以及两者集成的可行性,从理论上建立了目标成本管理与作业成本管理集成的成本管理体系,并对该成本管理体系实施的保证机制进行了探讨。     

某型箔条/红外干扰弹投放器检测系统

为了实现干扰弹投放器的快速自动检测，在对其电子电路系统的工作原理进行深入分析的基础上，设计开发了一种新型干扰弹投放器检测系统，并详细介绍了系统的软硬件设计方案，该系统专用于某型干扰弹投放器的电子电路系统装机前的内场综合检验和测试，实现故障的实时诊断和定位。     

表面张力贮箱液体管理装置的网络分析

用修正迭代法和Newton－Raphson法，对表面张力贮箱的液体管理装置进行了网络分析计算和技术分析，确定了表面张力贮箱满足微重力或低重力下无泡排液条件时，液体管理装置中的收集器筛网尺寸、气泡陷井通气管尺寸，比较了不同介质的蓄流能力。