Author's Background

Resume

Zhang Wenjun, born on February 8,1964
Family background:
Qi Yanhong (wife), Assistant Prof. working on plant pathology, agricultural ecology and editor for the journal "Bulletin of Soil and Water Conservation". About 20 scientific papers have been published; Zhang Qi (daughter).

Education and Working Experience

Department of Plant Protection of Northwestern Agricultural University: Undergraduate, 1980-1984, Bachelor degree in Plant Protection, 1984; Postgraduate, 1984-1987, Master degree in Insect Ecology and Modeling, 1987; Postgraduate, 1990-1993, Doctoral degree in Plant Epidemiology and Modeling.
Assistant Professor engaging in biomathematics, modeling, ecology, and plant epidemiology, and head of Division of Insect Ecology and IPM, Northwestern Agricultural University, 1987-1993.
Postdoctor and Associate Professor working on epizootic modeling of vegetable insect disease, National Key Laboratory for Biological Control, Zhongshan University, 1994-1997.
Visiting scientist working on ecology of Bemesia tabasi in the University of Arizona, USA, Feb-Jun 1996.
Project Scientist and postdoctor in mathematical ecology, working on ecological algorithms and computer programming including Windows softwares, Internet softwares, and AI softwares, International Rice Research Institute (IRRI), 1997-2000.

Speciality

Since 1980, I have learned and studied all courses in mathematics, main courses in computer science and other sciences, including analytical mathematics, higher algebra, higher geometry, topology, complex function theory, real function theory, ordinary and partial differential equation, general function analysis, advanced statistics, calculative algorithm, control theory, artificial intelligence, operational research, computer programming (Basic, Fortran, C, Pascal, Database, Prolog, Windows, Java, Internet), environmental ecology, etc.
I specialize in Biomathematics, Computer Programming, Ecology, Entomology, Plant Pathology.

Scientific Researches

Theses for Academic Degree

My Master degree thesis is "System Analysis on Cotton-Cotton Aphid-Natural Enemies System" and score is A. The thesis use the theory and method of complex function theory and control theory to analyse and develop cotton growth, growth laws for injured and non-injured cotton, pulse model for cotton aphid population influenced by precipitation, insecticide controlling model, dynamic model for solar radiation and evapotranspiration, dynamic models for cotton aphid and natural enemies, transfer function models for automatic control system of cotton-cotton aphid-natural enemies, stability analyses and sensitivity analyses for transfer function models, etc. Overcompensation of cotton injured by cotton aphid, non-stability of the system disturbed by different natural enemies, and the optimal control techniques were discovered and developed respectively. 7 papers excerpted from the thesis have been published, among which 1 paper was published on Proceedings of International Conference on Biomathematics and 3 papers won awards.
My Doctoral degree thesis is "Epidemic Simulation and Fungicide Control Decision System of Wheat Scab" and score is A. About 20 years' data were analysed. The main contents include continuous spatial distribution models and sampling formula for primary inoculum of wheat scab, the relationship between development and temperature of perithecium, ascospore, and ascus of wheat scab, simulation model for perithecium development dynamics, re-infection of pathogen in Guanzhong Irrigated Area, simulation model for epidemic dynamics of wheat scab, assessment models for yield loss caused by wheat scab, fungicide control models to wheat scab, system model for epidemic forecast an fungicide control of wheat scab, and cybernetic models used to optimally control the epidemic dynamics of wheat scab, ets. 6 papers excerpted from the thesis have been published.

Other Scientific Researches

Since 1989, excepting for teaching, I have published more than 70 scientific papers and 5 booklets , sponsored and participated in 7 research projects, and won more than 10 awards.
I have ever finished a monograph "Decision-making, Cybernetic Techniques and Computer Softwares" (to be published) in which more than 40 algorithms and softwares were included: multiobjective decisionmaking, stochastic decisionmaking, multiobjective optimization, single objective optimization, clustering analyses, cybernetic system and analyses, optimal control, etc.

Postdoctoral Research in Zhongshan University

My postdoctoral research is focused on the epizootiology and simulation models for nuclear polyhedrosis virus of Spodoptera litura(SINPV). Multi-dimensional models for calculate the infected number through horizontal transmission, which considered the impacts of velocity, size and population density of insects on infected population, and infected threshold model for insect pathogens were developed. Mixture infection models for multi-species, non-linear death-temperature relationships of infected insects, simulation model for cabbage-S.litura-SINPV, and other epizootic models were also developed. In addition, the REVAWEA evaluation algorithm and indices system for microbial control which includes 13 indices in economic, environmental, and social benefits were developed. 6 papers have been published.

Project and Postdoctoral Research in IRRI

In the IRRI, up till now I have developed 32 Windows softwares, 32 Internet softwares, 12 Qbasic programs and an expert system shell. Each Windows software is a standalone executable program, which can be executed on Windows 95 and advanced environments. All Internet softwares are grouped into a homepage which can be executed on Internet web browser. Qbasic programs are all command-line types. Expert system shell is developed with Prolog language and can be executed on Windows 95 environment.
Each of Windows package and Internet package contains about 60 algorithms and models involving in statistics, ecology, differential equation, control theory, operational research, etc., among which some of the algorithms and models were developed by us, some of the algorithms were from journals and books. Each software in packages is a Windows program which includes several interfaces. The interfaces for saving result and graph are also included. 5 software booklets have been published in IRRI.

Some Honors and Awards

I was entitled:
"Outstanding Youth Scientist in Shaanxi Province" by Shaanxi Science and Technology Association(SSTA), Aug 1992;
"New Excellent Researcher in Shaanxi Province" by SSTA, Mar 1992;
"Chinese Master Who Has Made Outstanding Achievements" by Northwestern Agricultural University, Jan 1991;
"Excellent Award for Scientific Research in Postgraduate Group" by Northwestern Agricultural University, July 1992.
"Excellent Award for Teaching of Youth Teachers" by Northwestern Agricultural University, Sep 1992.
My papers and projects:
"A Systematic Model of Correlation with the System of Cotton-Cotton Aphid-Natural Enemies" and "An improvement of the Precise Algorithm of Intrisic Increase rate" won "Excellent Award for Scientific Paper in Shaanxi Province" from SSTA, May 1991;
"Frequency Spectrum Analysis and Stable Correlation Function for Plant Diseases" won "Biomathematics Award" from Shaanxi Society of Mathematics, Dec 1994;
"Cotton-Aphid-Enemies System Analysis" and "Two Kinds of Models to estimate Population Density and Infected Number of Mobile Insects" won "Excellent Award for Scientific Papers" from Chinese Society of Entomology, Feb 1992 and Oct 1996;
"Application Theory for Population Ecology and System Ecology of Wheat aphids and Cotton Aphid" won "Advanced Award for Science and Technology" from Shaanxi Education Commission, Nov 1992.

Some Publications

1 Zhang WJ, Schoenly KG. 1999. IRRI Biodiversity Software Series. II. COLLECT1 and COLLECT2: programs for calculating statistics of collector's curves. IRRI Technical Bulletin No.2. Manila(Philippines): International Rice Research Institute. 15p.
2 Zhang WJ, Schoenly KG. 1999. IRRI Biodiversity Software Series. III. BOUNDARY: a program for detecting boundaries in ecological landscapes. IRRI Technical Bulletin No.3. Manila(Philippines): International Rice Research Institute. 17p.
3 Zhang WJ, Schoenly KG. 1999. IRRI Biodiversity Software Series. IV. EXTSPP1 and EXTSPP2: programs for comparing and performance-testing eight extrapolation-based estimators of total taxonomic richness. IRRI Technical Bulletin No.4. Manila(Philippines): International Rice Research Institute. 13p.
4 Schoenly KG, Zhang WJ. 1999. IRRI Biodiversity Software Series. I. LUMP, LINK, and JOIN: utility programs for biodiversity research. IRRI Technical Bulletin No.1. Manila (Philippines): International Rice Research Institute. 23p.
5 Schoenly KG, Zhang WJ. 1999. IRRI Biodiversity Software Series. V. RARE, SPPDISS and SPPRANK: programs for detecting between-sample differences in community structure. IRRI Technical Bulletin No.5. Manila(Philippines): International Rice Research Institute. 17p.
6 Zhang Wenjun et al. 1995. Mathematical models for fungicide control decision of wheat scab. Journal of Biomathematics, 10(4).
7 Zhang Wenjun et al. 1995. Two kinds of models to estimate population density and infected number of mobile insects. Journal of Biomathematics, 10(3).
8 Zhang Wenjun et al. 1996. Cybernetic models for epidemic dynamics of wheat scab. Journal of Biomathematics, 11(3).
9 Zhang Wenjun et al. 1990. The grey predication and grey connection analysis of rice ear and neck blast. The Chinese Journal of Plant Pathology, 20(1).
10 Zhang Wenjun et al. 1992. Astronomical causes of ecosystem-farm production-pest abnomality and discipline development. In: Transactions of the Ecological Society of Chinese Youths , Vol. 2, China Science and Technology Press.
11 Zhang Wenjun et al. 1996. Infection threshold of SlNPV to larva of Spodoptera litura F. Journal of Zhongshan University, 35(3).
12 Zhang Wenjun et al. 1996. A kind of algorithm for stochastic decision-making in insect pest management. Bulletin of Science and Technology, 12(5).
13 Zhang Wenjun et al. 1997. Simulation model for epizootic disease of Spodoptera litura F. baculovirus. Journal of Zhongshan University, 36(1).
14 Zhang Wenjun et al. 1997. Objective system and benefit evaluation for microbial control of pests. Journal of Biomathematics, 12(3).
15 Zhang Wenjun et al. 1998. Mathematical models to describe mixture infection of multi-species pathogens to insects. Journal of Biomathematics, 13(2).
16 Zhang Wenjun et al. 1998. Dynamic model to describe spatial and temporal changes of insect population. Journal of Biomathematics, 13(3).
17 Zhang Wenjun et al. 1997. Relationship between temperature and development of spodoptera litura F. Journal of Zhongshan University, 36(2).
18 Zhang Wenjun et al. 1999. A simulation model for growth and development of Chinese Cabbage and its linkage with epizootic disease of insect virus. Journal of Biomathematics, 14(3) (to be published).
19 Zhang Wenjun et al. 1997. Relative aggregation indices and sampling formula for diseases of insects. Journal of Zhongshan University, 36(1).
20 Zhang Wenjun et al. 1997. Quantitative equations to determine field decay and application dosage of insect virus. Chinese Journal of Biological Control, 13(5).
21 Zhang Wenjun et al. 1989. A study on simplex algorithm solving non-linear equation parameters and modelling advantage. Journal of Northwestern Agricultural University, 17(Suppl.).
22 Zhang Wenjun et al. 1989. The application of Pearson 3 transform in modelling insect population dynamics. Journal of Northwestern Agricultural University, 17(3).
23 Zhang Wenjun et al. 1990. A simulation model of cotton aphid population. Chinese Journal of Ecology, 9(5).
24 Zhang Wenjun et al. 1992. Continuous spatial distribution models of biological population and their application. Chinese Journal of Applied Ecology, 3(2).
25 Wang Shize and Zhang Wenjun. 1989. Models of injured and non-injured cotton(the content excerpted from my Master Degree thesis). Journal of Biomathematics, 4(1).
26 Wang Shize and Zhang Wenjun. 1993. The theory and practice for data classification using in pest forecasting model. Journal of Biomathematics, 8(4).
27 Zhang Wenjun et al. 1989. A systematic model of correlation with the system of cotton-cotton aphid-natural enemies. Journal of Northwestern Agricultural University, 17(Suppl.).
28 Zhang Wenjun et al. 1989. An improvement of the precise algorithm of intrinsic increase rate. Journal of Northwestern Agricultural University, 17(Suppl.).
29 Zhang Wenjun et al. 1992. Determination of rational applying concentration of insecticides using dynamics modelling method. Chinese Journal of Ecology, 11(2).
30 Zhang Wenjun et al. 1991. A study on appraising disease resistance of wheat scab applying MOD theory. The Chinese Journal of Plant Pathology, 21(3).
31 Zhang Wenjun et al. 1991. Decision-making and evaluation to scab resistance for wheat scab varieties. Journal of Yunnan Agricultural University, 6(3).
32 Zhang Wenjun et al. 1989. Multi-objective decision making of insecticides effects upon controlling grain aphid. Journal of Northwestern Agricultural University, 17(Suppl.).
33 Zhang Wenjun et al. 1990.Sampling formula on continuous models of spatial distribution patterns. Journal of Biomathematics, 5(3).
34 Zhang Wenjun et al. 1991. Frequency spectrum analysis and stable correlation function for plant diseases. Journal of Biomathematics, 6(3).
35 Zhang Wenjun et al. 1990. A multi-objective optimization to wheat-natural enemy-insecticide-wheat aphids system. Journal of Northwestern Agricultural University, 8(4).
36 Zhang Wenjun et al. 1989. An optimization dynamics of grain aphid population with multi-objective of insecticide dosage, wheat yield and natural enemies. Journal of Northwestern Agricultural University, 17(Suppl.).
37 Zhang Wenjun et al. 1991. Technical specification of managing main crop pests on the Weibei Rainfed highland. Agricultural Research in the Arid Areas, 4.
38 Zhang Wenjun et al. 1992. Multiobjective group decision-making for cooperative management of plant protection in orange plantations. Chinese Journal of Ecology, 11(4).
39 Zhang Wenjun et al. 1992. Extreme value distribution forecast to plant diseases. Plant Pest Forecasts, 12(Suppl.).
40 Wang Shize and Zhang Wenjun. 1989. The effect of insecticides upon the dynamics simulating model of insect population(The content excerpted from my Master Degree thesis). Journal of Northwestern Agricultural University, 17(Suppl.).
41 Wang Shize and Zhang Wenjun. 1989. A model of rainfall inflicting casualty upon cotton aphid population(The content excerpted from my Master Degree thesis). Journal of Northwestern Agricultural University, 17(4).
42 Wang Shize and Zhang Wenjun. 1989. Comparison of cotton plant growth methods under both aphids damages and non-aphid damages(the contents excerpted from my Master Degree thesis). China Cotton, 16(2).
43 Zhang Wenjun et al. 1991. Comprehensive indices for drought resistance of wheat seeding and its decision making. Acta Botanica Boreali-Occidentalia Sinica, 11(5).
44 Zhang Wenjun et al. 1992. Classification and decision-making evaluation of grasslands. Pratacultural Sciences, 9(5).
45 Zhang Wenjun et al. 1992. Two-dimensional order clustering and its application in the regionlization of agriculture. Bulletin of Soil and Water Conservation, 13(1).
46 Zhang Wenjun et al. 1992. Decomposition clustering to different grasslands and its softwares. Pratacultural Sciences, 9(6).