Science & Technology Review CONTENTS

Vol.25  No.16  2007 (Sum No. 238)

This issue published on 25. Aug., 2007

Forward

1  Innovations of Science &Technology and Mechanism Drive the Leaping Development of Society

WANG Yangyuan

News Round

7  For a Better Tomorrow

SU Qing

Special to S&T Review

15  China Yowth Science and Tecnology Prize Proved Effective in Its 20-year History

Editorial Department

Articles

18  Feasibility Study on the Correspondence Between In-flight Physiological Parameters of Fighter Pilot and Dynamic Flight Status Parameters

YAO Yongjie, CHANG Yaoming, WU Xingyu, et al.

Abstract: In the present study, three fighter pilots were monitored while performing routine flight training. ECG, respiration wave, body temperature, body movement and acceleration (Gz & Gx) were continuously measured and analyzed using a small recording device strapped around the chest. The flight parameters, critical events as well as the flight path of each flight were recorded using flight parameters recorder during the real flight and analyzed at the end of flight. The instantaneous heart rate and respiration rate at any flight instant can be determined through analyzing flight parameters recorded using flight parameters recorder. Time-domain analysis and frequency-domain analysis of short-time rapid HRV are carried out in different flight phases. This study provides a technique to analyze exactly in-flight psycho-physiological parameters and to measure mental workload dynamically.

Key Words: performance; psychophysiological measurement; pilot; flight parameters; engineering psychology; ergonomics

CLC Number: R852  Document Code: A  Article ID: 1000-7857(2007)16-0018-04

22  Prilimary Analysis on Polarimetric Microwave Radiation in Sanjiangyuan Region

WANG Zhenzhan, YIN Xiaobin

Abstract: With its cloud-penetrating capability, the microwave radiometer can provide all-weather information of ground surface, except for rainy areas. WindSat, the first polarimetric microwave radiometer in the world, can measure all of the four Stokes parameters. The third and fourth Stokes parameters, which have never been measured globally and for a long time, can be used to study Sanjiangyuan region. The types of ground, such as water, vegetation, hungriness and so on, can be easily distinquished according to all of the four Stokes parameters. Small lakes and swamps may be mistaken as bare soil or hungriness by using only vertical and horizontal polarimetric brightness temperature TV and TH. So, the identification with four parameters can eliminate errors with respect to soil moisture. In this respect, the microwave radiometer is superior in studying Sanjiangyuan, where there are various types of ground. The trends of isolines of TV, TV-TH, MPDI (MPDI=(TV-TH)/(TV+TH)) and the third Stokes parameters T3 are generally southwest-northeast for forest of conifer, plain of meadow, droughty plain, hungriness distributed from southeast to northwest. The microwave radiation changes seasonally along with melting and freezing of ice and snow, growing and decaying of vegetation. The differences between TV and T3 of forward looking and back looking show that the microwave radiation of Sanjiangyuan region is anisotropic. The anisotropy of snow and ice and lake is stronger than that of vegetation and hungriness.

Key Words: space-borne microwave remote sensing; Sanjiangyuan region; character of microwave radiation; polarimetric

microwave radiation

CLC Number: P  Document Code: A  Article ID: 1000-7857(2007)16-0022-08

30  Web Based Big File Uploading

LIN Tianhua, MA Suxia, ZHAO Xia

Abstract: Web based big file uploading is a common problem in web applications. At present, there are few web-based  big file uploading components available, and none of them supports resumption from interrupted transfers. This paper implements a new big file uploading method, which supports resumption from interrupted transfers. File blocks are read using JavaScript and ADODB.Stream, and are transferred asynchronously using XMLHttp, and then  log is placed on the server when received. The transfer speed is improved greatly, and there is no limitation for file size using this method.

Key Words: XMLHttp; ADODB.Stream; asynchronous transfer; big file uploading; resumption from interrupted transfers

CLC Number: TP393.093  Document Code: A  Article ID: 1000-7857(2007)16-0030-04

34  Multidimensional Qualitative Data Analysis Based on the Rough Set Flow Graphs

FAN Xiaowen,ZHU Jianping

Abstract: In view of the limitations of the existing multidimensional qualitative data analysis methods in dealing with massive data, this paper proposes to use the flow graphs theory for the multi-dimensional qualitative data cross-classification analysis. The inter-relations between qualitative variables are expressed with graphs and the pattern related with the qualitative data is analyzed based on inference from the values of the graphs, which can overcome the difficulty in using the high-dimensional contingency tables. Examples are given.

Key Words: flow graphs; multidimensional qualitative data; contingency table

CLC Number: O177.99  Document Code: A  Article ID: 1000-7857(2007)16-0034-04

38  Evaluation of Four International Metasearch Systems

LV Ruihua, CUI Yuhong, CUI Hongwei, et al.

Abstract: With six aspects used as indexes, including interface design, core technique, searching function, management, personalized design, this paper gives an evaluation of the Metalib, Multisearch, Resaerch PRO and  WebfeatExpress. The result shows that the Metalib and WebfeatExpress are better than the others in technical aspects,  but the use of Metalib needs more personal and material resources

Key Words: metaserching; integrated searching; simultaneous searching; evaluation

CLC Number: G354.4  Document Code: A  Article ID: 1000-7857(2007)16-0038-04

42  Empirical Study on Relationship Between Economic Growth and Environmental Pollution in China

GUO Hongyan, FAN Fengming, WU Jisong

Abstract: Panel data of 29 provinces in China during 1999-2005 are used to examine the relationship expressed by Environmental Kuznets Curve (EKC) between per capita income and pollution indicators in eight categories. It is found that the EKC does not assume a definite shape for all pollution indicators, and the inverted-U-shaped curve can change in a long time. The curve shape is related with pollution indicators and data types.

Key Words: economic growth; environmental pollution; environmental Kuznets curve

CLC Number: C812  Document Code: A  Article ID: 1000-7857(2007)-0042-07

49  Study on Photosynthetic Potential Productivity of Wheat in Shanxi

MI Jingjing, LI Suqing, GUO Lu

Abstract: According to the concept of photosynthetic potential productivity put forward by Huang Bingwei, this paper divides the wheat producing area in Shanxi province into 3 parts by Photoshop 8.0, based on the climate in Shanxi area and the geographical features and actual cropping conditions. According to different varieties, cultivation methods and ecological conditions, the paper makes several suggestions in analyzing the difference between the real output and the theoretical one It is shown that the potential of the wheat output is great in Shanxi province, and the climate factor, seeds and the environment are important for raising the output of the wheat.

Key Words: photosynthetic potential productivity; wheat output; ray radiation

CLC Numbers: S5-033，S512.1  Document Code: A  Article ID: 1000-7857(2007)16-0049-04

53  Theoretical Analysis and Numerical Simulation of the Formation and Structure of Human Social System

LIN Fei,CHAI Lihe

Abstract: Human social system has intricate formation and structure and is in a constant evolution. This paper analyzes the process of formation and evolution of social system structure by a new universal principle called Maximal Flux Principle (MFP). A model based on MFP and Self Organization Map (SOM) Neural Networks is proposed to simulate the formation process of the Qing Dynasty. This paper also tries to find the underlying dynamics of social system evolution.

Key Words: social system; Maximal Flux Principle; structure; evolution

CLC Numbers: E911, O414.2  Document Code: A  Article ID: 1000-7857(2007)16-0053-04

Perspectives

57  Analysis on the Issue "Can Astronauts See the Great Wall with Naked Eyes from the Lower Orbit Round the Earth" as Viewed from Military Theory

YUAN Lin,YAN Jun,XIONG Wei, et al.

Reviews

61  Progress of Experiments on HL-2A

DONG Jiaqi, YAN Longwen, DUAN Xuru

68  Progress and Current State of Image Wireless Transmission System for MUAV and Its Key Technologies

GAO Zhen, DENG Jiahao, SUN Ji, et,al.

73  Technology and Application of Planar Transformer Applied to Switch Mode Power Supply

LIANG Qi, ZENG Qingxuan

79  Notes on Reviews in Chinese Science Abstracts (Chinese Edition)

Suggestion

80 Speed up the Development of Coal Seam Gas, etc.

Commentary

81  A Question for Research Funding: The More the Better

WU Yishan

82  Recommending Two Postgraduate Pillowbooks

SHI Chaoyun

82  Recommending Two Postgraduate Pillowbooks

SHI Chaoyun

83  Book Appraisal

Science Reports

84  Scientific Research on Chinese Traditional Medicine(V)

Editor-in-chief's Thoughts

89  How to Pound the Foundation of Postgraduates Successful Research Career (VIII)

FENG Changgen

Special Columns

6  Cover Story

9  Voice of Scientific Communit

10  Half-month News Briefs

12  International Journal Highlights

13  Domestic Journal Highlights

14  Scientific Community Briefs

16  Guidance for Contributors to Science and Technology Review

86  Events

87  Guidance for Contributors to Science and Technology Review

88  Readers'Letters

90  Entertainment

92  Digest of Chinese Newspapers and Journals

93  Career

95  Global Jobs