Wigner-Matrix-Based Normality Test and Application to Weak Signal Detection in SISO/SIMO Systems

Based on the asymptotic spectral distribution of Wigner matrices, a new normality test method is proposed via reforming the white noise sequence. In this work, the asymptotic cumulative distribution function （CDF） of eigenvalues of the Wigner matrix is deduced. A numerical Kullback-Leibler divergence of the empiric-d spectral CDF based on test samples from the deduced asymptotic CDF is established, which is treated as the test statistic. For validating the superiority of our proposed normality test, we apply the method to weak SIPSK signal detection in the single-input single-output （SISO） system and the single-input multiple-output （SIMO） system. By comparing with other common normality tests and the existing signal detection methods, simulation results show that the proposed method is superior and robust.

Chair's Introduction to 2009 IEEE Circuits and Systems International Conference on Testing and Diagnosis

Based on the recommendation of ICTD＇09 TPC members, this Special Issue of the Journal of Electronic Science ＆ Technology of China （JESTC） contained 22 high quality papers selected from the Proceedings of 2009 IEEE Circuits and Systems International Conference on Testing and Diagnosis （ICTD ＇09） which is fully sponsored by the IEEE Circuits and Systems Society （CASS）, and is technically co-sponsored by the University of Electronic Science and Technology of China （UESTC）, the Chinese Institute of Electronics （CIE）, the China Instrument ＆ Control Society （CIS）, and organized by UESTC.

SPECTRAL TECHNIQUES FOR OFF-LINE TESTING AND DIAGNOSIS OF COMPUTER SYSTEMS

In this paper we present some of our recent results on applications of spectral techniques over finite fields to the problems of testing and diagnosis of computer systems.

Non-Probabilistic Approach to the Time of Energy Emission in Small Quantum Systems

The energy emitted by an electron in course of its transition between two quantum levels can be considered as a dissipated energy. This energy is obtained within a definite interval of time. The problem of the size of the time interval necessary for transitions is examined both on the ground of the quantum approach as well as classical electrodynamics. It is found that in fact the emission time approaches the time interval connected with acceleration of a classical velocity of the electron particle from one of its quantum levels to a neighbouring one.

APPLICATION OF NONLINEAR PID CONTROLLER IN AERODYNAMICS LOADING SYSTEM

The design idea of tracking-differentiator and the nonlinear PID controllerare introduced, the applicable algorithm and its real result for distributed aerodynamicsloading control system are discussed, and the construction of the test & contro1 system arealso presented. The application shows that the nonlinear PID algorithm has the advan-tages of high reliability, short run time and strong stability.

Chemical Composition of Artemisia subdigitata Mattf.

[Objectives] The aim was to study the chemical composition of the aboveground part of Artemisia subdigitata Mattf. [Methods]Using the systemic preparative test,the water extract,ethanol extract and petroleum ether extract of the aboveground part of A. subdigitata were subjected to physiochemical identification,and the contained chemical constituents were identified preliminarily. [Results] The preliminary comparisons of preparative test results of the aboveground part of A. subdigitata suggested that the whole plant may contain saponins,tannins,phenols,flavonoids,anthraquinones,coumarins,lactones,alkaloids,sterides or triterpenes,volatile oils and oils. [Conclusions]A. subdigitata contains a variety of chemical constituents. This study provides certain experimental basis for the further research and development and utilization of A. subdigitata.

DETECTION OF LUNG INVOLVEMENT BY HRCT IN SYSTEMIC LUPUS ERYTHEMATOSUS

Objective To assess the sensitivity of high-resolution CT (HRCT) in detecting pulmonary involvement attributed to systemic lupus erythematosus (SLE). Methods Plain chest radiography, HRCT, and pulmonary function testing of 36 patients with SLE were analyzed. Results The sensitivity of the pulmonary involvement by HRCT, plain chest radiography and pulmonary function testing were 88.9%,36.1%,and 33.3%, respectively. Conclusion HRCT played an important role in detecting pulmonary involvemen due to SLE, especially in early and mild cases.

Evaluation of repeated exposure systemic toxicity test of PVC with new plasticizer on rats via dual parenteral routes

Systemic toxicity caused by repeated exposure to both polar and nonpolar leachables of di(2-ethylhexyl)-1,2-cyclohexane plasticized polyvinyl chloride(PVC)was evaluated with dual routes of parenteral administration method on rats in the study.Experimental group and control group were designed by researchers.Tail intravenous injection with 0.9%sodium chloride injection extracts and intraperitoneal injection with corn oil extracts were conducted to the experimental rats while tail intravenous injection with 0.9%sodium chloride Injection and intraperitoneal injection with corn oil were conducted to the control rats.After 14 days,blood specimens were collected for clinical pathology(hematology and clinical chemistry)analysis.Selected organs were weighed and a histopathological examination was conducted.As a result,compared with the control animals,there were no toxicity-related changes on the parameters above.The results show that the rats do not show obvious systemic toxicity reaction caused by repeated exposure with dual routes of parenteral administration method on rats after administration with both polar and nonpolar exacts of di(2-ethylhexyl)-1,2-cyclohexane plasticized PVC simultaneously up for 14 days.

On the technologies of Hα imaging spectrograph for the CHASE mission

The Hα imaging spectrograph(HIS) is the scientific payload of the first solar space mission, the Chinese Hα solar explorer(CHASE), supported by the China National Space Administration(CNSA). The CHASE/HIS achieves, for the first time in space, Hα spectroscopic observations with high spectral and temporal resolutions. Separate channels for the raster scanning mode(RSM) and continuum imaging mode(CIM) are integrated into one, and a highly integrated design is achieved through multiple folding of the optical path and ultra-light miniaturized components. The design of HIS implements a number of key technologies such as high-precision scanning of the optical field of view(FOV), high-precision integrated manufacturing inspection, a large-tolerance pre-filter window, and full-link solar radiation calibration. The HIS instrument has a pixel spectral resolution of 0.024 ? and can complete a full-Sun scanning within 46 s.