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Science china(Technological sciences) 2006年第Z1期49卷 1-8页

作者： TANG Shouzheng, TANG Una, Guofan Shao & DAI Limin Research Institute of Resource information Techniques, chinese academy of Forestry, beijing 100091, china Institute of Applied Ecology, chinese academy of sciences, Shenyang 110016, china Departmet of Forestry and Natural Resources, Purdue university, West Lafayette, IN 47907, USA graduate university, chinese academy of sciences, beijing 100101, china Research Institute of Resource information Techniques Chinese Academy of Forestry Beijing China Institute of Applied Ecology Chinese Academy of Sciences Shenyang China graduate university Chinese Academy of Sciences Beijing China Department of Forestry and Natural Resources Purdue University West Lafayette USA

Digital Forestry as a concept was developed after the Digital Earth program. The chinese scientists were not only among the pioneers who first proposed the concept of Digital Forestry, but also contributed a lot to the development of Digital Forestry. Digital Forestry is a digital framework to maintain forest planting, management, using, and protect. The synergetic use of computationally-intensive quantitative methods together with information technologies is the most important foundation for the development of Digital Forestry. Under this situation, the experience of Digital Forestry development in china is relatively rich. A number of academicians, scholars, and professional administrators were involved in discussing the Digital Forestry Construction Scheme. The Project of Digital Forestry Practicability approved by the state Forestry Administration is a major instance in developing Digital Forestry standard and key techniques. By introducing a case study of Digital Forestry, this paper reviews the concept of Digital Forestry, the way turning traditional forestry into Digital Forestry, and the future development of Digital Forestry.

关键词： Digital Forest, Digital Earth, Digital Forestry standard, Digital Forestry techniques.

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Response synchronization: New progress in brain-visual information processing

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chinese Science Bulletin 1999年第16期44卷 1447-1458页

作者： ZHAO Songnian, XIONG Xiaoyun, YAO Guozheng and GUO Aike1. state key laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry , Institute of Atmospheric Physics , chinese academy of sciences , beijing 100029, china 2. Commission of the National Natural Science Foundation of china , beijing 100083, china 3. The Center of information Science , Peking university, beijing 100871, china 4. Open laboratory of Visual information Processing , Institute of Biophysics , chinese academy of sciences , beijing 100101, china state key laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry Institute of Atmospheric Physics Chinese Academy of Sciences Beijing China Commission of the National Natural Science Foundation of china Beijing China The Center of information Science Peking University Beijing China Open laboratory of Visual information Processing Institute of Biophysics Chinese Academy of Sciences Beijing China

Studies on brain-vision have entered a new stage, after the stimulus-induced y synchronized oscillation of neuron group activities have been discovered in cat primary visual cortex. Naturally, how to understand the visual system became a very important methodological problem. From aspects such as information processing, nonlinear dynamics and neuronal network, some primary problems in vision studies have been deeply discussed, which are

关键词： neuron group (neural population) synchro-oscillation computational theory of vision response synchroniza-tion.

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Study on thermal infrared remote sensing of Yarlung Zangbo River and Bangong Co-Nujiang River suture belt in Qinghai-Tibet Plateau

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Science china(Technological sciences) 2006年第Z2期49卷 108-113页

作者： BI Siwen, YAN Hao & WANG Changyao state key laboratory of Remote Sensing sciences, Institute of Remote Sensing Application, chinese academy of sciences, beijing 100101, china key laboratory of Three-Dimensional information Acquisition and Application, Ministry of Education, Capital Normal university, beijing 100037, china chinese Acad Sci Inst Remote Sensing Applicat State Key Lab Remote Sensing Sci Beijing 100101 Peoples R China Capital Normal Univ Minist Educ Key Lab Dimens Informat Acquisit & Applicat Beijing 100037 Peoples R China

The area change of heat abnormity is not in accordance with conclusions of former thermal infrared remote sensing studies of the Qinghai-Tibet Plateau, which were that the temperature of Yarlung Zangbo River suture belt of the southern Plateau is high and the northern temperature is low. The study result in this paper shows that the highest temperature is found in the Bangong Co-Nujiang River suture belt, the Yarlung Zangbo River suture belt temperature is the second highest, and the northern Tibet temperature is the lowest. The study demonstration area was the suture belt areas of the Yarlung Zangbo River and the Bangong Co-Nujiang River in the Qinghai-Tibet Plateau, where the land temperature of the Qinghai-Tibet Plateau and the bore temperature of field land surface were measured and the emissivity of land surface was calculated. In addition, the authors explore the mechanism of the relationship between thermal infrared remote sensing and constructing thermodynamics and reach four new conclusions about the thermodynamics of the Tibet Plateau.

关键词： Qinghai-Tibet Plateau, Yarlung Zangbo River-Bangong Co-Nujiang River, suture belt, thermal infrared remote sensing, heat abnormity.

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The Ternary Goldbach Problem with Primes in Arithmetic Progressions

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Acta Mathematica Sinica,English Series 2001年第4期17卷 679-696页

作者： Zhen Feng ZHANG Tian Ze WANG state key laboratory of information security, graduate School, chinese academy of sciences, beijing 100039, P. R. china Depariment of Mathematics, Henan university, Kaifeng 475001, P. R. china Department of Mathematics, Henan university, Kaifeng 475001, P. R. china state key laboratory of information security Graduate School Chinese Acacemy of Sciences Beijing 100039 P. R. China Department of Mathematics Henan University Kaifeng 475001 P. R. China

In this paper, we give an explicit numerical upper bound for the moduli of arithmetic progressions, in which the ternary Goldbach problem is solvable. Our result implies a quantitative upper bound for the Linnik const... 详细信息

关键词： Ternary Goldbach problem Prime Arithmetic progression Circle method

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An Earth multi-body system elasticity and plasticity dynamics model

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Science china(Technological sciences) 2006年第Z2期49卷 23-29页

作者： ZHANG Qingxian, BI Siwen & GONG Huili Education Ministry key laboratory of Three-Dimensional information Extraction and Application, Capital Normal university, beijing 100037, china state key laboratory of Remote Sensing Science, IRSA, chinese academy of sciences, beijing 100101, china Capital Normal Univ Educ Minist Key Lab Dimens Informat Extract & App Beijing 100037 Peoples R China chinese Acad Sci IRSA State Key Lab Remote Sensing Sci Beijing 100101 Peoples R China

Research on the elasticity and plasticity dynamics of the Earth multi-body system, including the Earth multi-body system stratum-block's equivalent inertia force system and generalized inertia force, the Earth multi-body system stratum-block's equivalent inertia force system expressed with partial velocity and partial palstance, and Earth multi-body system generalized inertia force expressed with partial velocity and partial palstance. This research provides a theoretical foundation for further investigation of Earth multi-body dynamics.

关键词： Earth multi-body system, equivalent inertia force system, generalized inertia force, elasticity and plasticity, dynamics model.

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Dry electrode for the measurement of biopotential signals

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Science china(information sciences) 2011年第11期54卷 2435-2442页

作者： WANG Yu 1,2,PEI WeiHua 2,GUO Kai 2,GUI Qiang 2,LI XiaoQian 2,CHEN HongDa 2 & YANG JianHong 11 Institute of Microelectronics,School of Physical Science and Technology,Lanzhou university Lanzhou 730000,china 2.state key laboratory on Integrated Optoelectronics,Institute of Semiconductors,chinese academy of sciences,beijing 100083,china Institute of Microelectronics School of Physical Science and Technology Lanzhou University Lanzhou China state key laboratory on Integrated Optoelectronics Institute of Semiconductors Chinese Academy of Sciences Beijing China

This paper introduces a kind of silicon-based dry electrode for measuring biological *** uses microneedle arrays to penetrate into the stratum corneum to reduce skin *** dry electrode requires neither skin preparation nor the electrolytic gel,is easy to use and causes no skin *** different technologies are chosen to manufacture microneedle arrays of dry *** is deep dry etching combined with isotropic wet *** other is mechanical dicing combined with chemical wet etching (including isotropic wet etching and anisotropic wet etching).Microneedle arrays are coated with metal and divided into 25 mm 2 as dry electrode *** testing shows that the impedance value of dry electrode can be comparable with that of commercial electrode in the 20 Hz-10 kHz frequency *** steady-state visual evoked potential recording and analysis prove that the dry electrode can be used to detect electroencephalography.

关键词： dry electrode microneedle array dry etching wet etching EEG

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Refined Convergents to the Associated Continued Fractions for Binary Sequences

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Acta Mathematica Sinica,English Series 1994年第2期10卷 179-191页

作者： Dai Zongduo Zeng Kencheng state key laboratory of information security Academia Sinica beijing, 100039 china state key laboratory of information security Academia Sinica Beijing China

The relation between continued fractions and Berlekamp’s algorithm was studied by some reseachers. The latter is an iterative procedure proposed for decoding BCH codes. However, there remains an unanswered question whether each of the iterative steps in the algorithm can be interpreted in terms of continued fractions. In this paper, we first introduce the so-called refined convergents to the continued fraction expansion of a binary sequence s, and then give a thorough answer to the question in the context of Massey’s linear feedback shift register synthesis algorithm which is equivalent to that of Berlekamp, and at last we prove that there exists a one- to-one correspondence between the n-th refined convergents and the length n segments.

关键词： Refined Convergents to the Associated Continued Fractions for Binary Sequences

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Possible mechanism of the effect of convection over Asian-Australian “land bridge” on the East Asian summer monsoon onset

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Science china Earth sciences 2006年第11期49卷 1223-1232页

作者： HE Jinhai1, WEN Min2, DING Yihui3 & ZHANG Renhe2 1. Jiangsu key laboratory of Meteorological Disaster (KLME), Nanjing Institute of Meteorology, Nanjing university of Informa- tion Science and Technology, Nanjing 210044, china 2. state key laboratory of Severe Weather (LaSW), chinese academy of Meteorological sciences, beijing 100081, china 3. National Climate Center, chinese Meteorological Administration, beijing 100081, china Jiangsu key laboratory of Meteorological Disaster (KLME) Nanjing Institute of Meteorology Nanjing University of Information Science and Technology Nanjing China state key laboratory of Severe Weather (LaSW) Chinese Academy of Meteorological Sciences Beijing China National Climate Center Chinese Meteorological Administration Beijing China

The Asian-Australian “land bridge” is an area with the most vigorous convection in Asian monsoon region in boreal spring, where the onset and march of convection are well associated with the onset of East Asian summer monsoon. The convection occurs over Indo-china Peninsula as early as mid-April, which exerts critical impact on the evolution of monsoon circulation. Before mid-April there are primarily sensible heatings to the atmosphere over Indo-china Peninsula and Indian Peninsula, so the apparent heating ratios over them decrease with height. However, after mid-April it changes into latent heating over Indo-china Peninsula due to the onset of convection, and the apparent heating ratio increases with height in mid- and lower troposphere. The vertical distribution of heating ratio and its differences between Indo-china Peninsula and Indian Peninsula are the key factors leading to the splitting of boreal subtropical high belt over the Bay of Bengal. Such mechanism is strongly supported by the fact that the evolution of the vertical heating ratio gradient above Indo-china Peninsula leads that of 850 hPa vorticity over the Bay of Bengal. Convections over Indo-china Peninsula and its surrounding areas further increase after the splitting. Since then, there is a positive feedback lying among the convective heating, the eastward retreat of the subtropical high and the march of monsoon, which is a possible mechanism of the advance of summer monsoon and convection from Indo-china Peninsula to South china Sea.

关键词： Asian-Australian 'land bridge', tropical convection, Indo-china Peninsula, the splitting of boreal subtropical high belt, East Asian summer monsoon onset.

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Attention and available long-term memory in an activation-based model

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Science china(Life sciences) 2010年第6期53卷 743-752页

作者： LIU ZhaoMin1,GUO ChunYan2,3 & LUO Liang4 1 School of Sociology,china university of Political Science and Law,beijing 102249,china 2 beijing key laboratory of Learning and Cognition,Department of Psychology,Capital Normal university,beijing 100048,china 3 key laboratory of Mental Health,chinese academy of sciences,beijing 100101,china 4 state key laboratory of Cognitive Neuroscience and Learning,beijing Normal university,beijing 100875,china School of Sociology China University of Political Science and Law Beijing China beijing key laboratory of Learning and Cognition Department of Psychology Capital Normal University Beijing China key laboratory of Mental Health Chinese Academy of Sciences Beijing China state key laboratory of Cognitive Neuroscience and Learning Beijing Normal University Beijing China

The influence of attention on memorizing related items and on available long-term memory (ALTM) was explored,showing that N400 of no-memory items was more negative than that of the memory *** results of the category comparison task indicated that information processing under attention-driven in WM determined the availability of related long-term memory,i.e.,specific content,which was formerly concerned or ignored,yielding different indirect semantic priming *** indicate that the orientation of conceptual attention leads the related representations of LTM to diverse activation patterns,supporting the activation-based model.

关键词： activation-based model attention available long-term memory event-related potentials

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Risk Analysis on Groundwater Resources Carrying Capacity Based on Blind Number Theory

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Wuhan university Journal of Natural sciences 2007年第4期12卷 669-676页

作者： ZHANG Ji1,2,YU Sujun31. key laboratory of Mountain Hazards and Surface Process,chinese academy of sciences/Institute of Mountain Hazards and Environment,chinese academy of sciences,Chengdu 610041,Sichuan,china 2. graduate university of the chinese academy of sciences,beijing 100049,china 3. School of Environmental Science and Engineering,Southwest Jiaotong university,Chengdu 610041,Sichuan,china key laboratory of Mountain Hazards and Surface Process Chinese Academy of Sciences Chengdu China graduate university of the chinese academy of sciences Beijing China Institute of Mountain Hazards and Environment Chinese Academy of Sciences Chengdu China School of Environmental Science and Engineering Southwest Jiaotong University Chengdu China

Blind numbers of evaluation indices about groundwater resources carrying capacity are defined from the concomitancy of randomness, fuzziness, grey property and unascertainment of groundwater system. Based on fuzzy theory, a comprehensive evaluation model on groundwater resources carrying capacity is constructed with blind information. Then a risk assessment model of surcharge about groundwater resources carrying capacity is established on blind reliability theory. The probable value ＂＊＂ matrix of fuzzy membership degree about carrying capacity corresponding to each judgment level can be obtained with the aid of blind algorithm as well as the subjective reliability ＂×＂ matrix. And then a graph of ＂groundwater carrying capacity v.s. accumulative reliability＂ can be gained Based on the graph, fuzzy membership degree of groundwater resources carrying capacity to each judgment level under different risk probability can be got. Thus, a comparatively reasonable judgment to groundwater resources carrying capacity might be obtained, with comprehensive analysis to the state of society, economy technology and ecology.

关键词： blind number theory groundwater resources carrying capacity evaluation risk analysis

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