Wang Zheng's academic achievements

In the study of theoretical geography, Wang Zheng not only put forward the general principles of theoretical geography, but also devoted himself to theoretical geomorphology and theoretical economic geography. In the early years, a series of analytical models of geomorphic evolution were developed, such as one-dimensional ideal river evolution model (1989), sediment thickness distribution model (199 1), coastline profile evolution model under the action of coastal current (1994) and sediment suspension entropy model (1994). After 2000, we focused on the study of theoretical economic geography, including deducing the spatial interaction model (1986, 1989, 2002) from the perspective of statistical mechanics, which proved the rationality of A E Wilson model and its validity under the development system, and worked out the mathematical form of spatial interaction cities. The spatial dynamics model of growth pole (1988, 1995), the location model of knowledge industry (1995), the spatial process model of knowledge spillover (2003, 2004), the industrial cluster model (2008) and the spatial pattern evolution theory of high-tech industry (2008) were developed. In these monographs, Wang Zheng (in cooperation with Ding Jinhong) put forward the theory that geographical things have the duality of environment and region, the information of geographical landscape boundary is uncertain, the five postulates of geography, the viewpoint of regional evolution and the theory of regional hub-network structure. In particular, it is of great significance to put forward the "unique theoretical geography system" (Hu Huanyong evaluation) and "clearly put forward the classification system of macroeconomic geography and microeconomic geography." (Evaluation by Wu Chuanjun)

In the study of regional management, Wang Zheng (in cooperation with Wu Bihu and others) put forward the concept of PRED coordination and geo-engineering theory (1987, 1989, 199 1, 1995), defined the concept and category of regional management, and put forward. The theory of regional knowledge management (2006, 2007), regional spillover model (20 10) and the theory of "three characteristics" of regional development (20 10, 20 12) are put forward. The latter is evaluated as the development of Krugman's new economic geography theory and Lu Dadao's view that there are new factors in regional growth, and is used to simulate the evolution of economic geography structure.

In computational geography, Wang Zheng developed the statistical basis of remote sensing image recognition (1987), the optimization algorithm of sedimentary basin restoration (1990), and the method of distinguishing abrupt changes in geographical processes (1990, 1995, 1996). 20 10), multi-country model of climate protection simulation analysis (2005~20 10), developed a variety of spatial operation algorithms (2006~20 10), and put forward the methodology of human geography in computer experiments. These works are reflected in Wang Zheng's monograph Computational Geography.

In recent years, combined with geography and management studies, Wang Zheng's main research work focuses on the study of man-land relationship model of climate change and macro-policy simulation of countries and regions, and is also committed to the development of theoretical economic geography.

In the Science of Climate Change: 199 1 puts forward the changes of precipitation curve in the historical period of China (Wang Zheng, Zhang Piyuan, Zheng Jingyun), and finds that the precipitation in China has been declining continuously since 2000, but it has been stable from 1230 to 1900. 1993 put forward the climate change stages in China in recent 2000, and found that there were abrupt climate changes in 1980s, 1980s and 1230 ~1260s, among which the abrupt climate changes in1230 and1260s were the largest in the history of China. 1995 proposed that 1830's, 19 10's have abrupt climate change, and described the natural trend of modern climate (in cooperation with Zhou Qingbo and Liu Xiaolei). 1996, Wang Zheng and Zhang Piyuan put forward the temperature change curve of China in recent ten thousand years, which was included in the national historical atlas. From 65438 to 0996, Wang Zheng and others (in cooperation with Zhang Piyuan, Liu Xiaolei and Liu Yanhua) published articles to demonstrate the influence of climate change on the population distribution in China, found the fluctuation of Hu Huanyong line under climate change, and emphasized that the zonality of vertical Hu Huanyong line in northern China was not obvious in the warm climate period, but highlighted the zonality of longitude. This influenced the historical development and dynasty change of China. In 2008, through the simulation based on agent, it was further demonstrated that the population distribution line in Hu Huanyong was formed no later than 1250. 1994, 1998.2005, Wang Zheng obtained the influence of historical climate change on agricultural production potential in China through calculation and simulation. In the aspect of climate protection economics, Wang Zheng developed the dynamic model of multinational climate protection policies affecting the economy under the constraint of stable economic growth and the dynamic model of carbon emission peak estimation, proposed a multi-regional climate change economic assessment system (MRICES) considering GDP spillover, and completed some policy simulation results.

In terms of economic calculation and policy simulation science, Wang Zheng 1997 draws the conclusion that "RMB depreciation is unnecessary, which will bring chaos to the economic system". 1998 simulation analysis shows that the desirable urbanization rate of China is 63%, and urbanization is a new economic turning point; From 65438 to 0999, the simulated grain price change had little effect on the total grain output in China, and then it was inferred that selling grain at a suitable price would not have a significant impact on the output, and an article was published to illustrate the harm of educational industrialization with data. In 2000, the simulation found that by adjusting the industrial structure, China did not have the water crisis predicted by Brown. After 2000, Wang Zheng presided over the research of China CGE, China multi-regional CGE, multi-country economic interaction ABS, national climate protection policy simulation system, SARS disaster reduction policy and other policy simulation systems, and carried out the research on agricultural impact of climate change, economic strategy of climate protection, macroeconomic policy of climate protection, RMB exchange rate policy, international geo-economic policy, energy policy, water resources policy and exchange rate policy.

In the field of theoretical economic geography, Wang Zheng's work can be summarized as three points:

1) solves the "closed system dilemma" of spatial interaction and develops the first law of economic geography; 2) Develop regional spillover theory and construct new industrial location theory; 3. Put forward the theory of three natures of new economic geography and construct a new discipline system.

Promoting the practical application of computing technology in geography and policy science is Wang Zheng's main interest: the results of computational geography and computational economics simulation carried out by Wang Zheng are related to the major issues of national economic development: simulating and evaluating the oil-forming conditions of Xihu sag (including Xiao Chun Oilfield) in the East China Sea. ), confirm the oil-forming conditions of oil fields, eliminate the doubts about the ore-forming conditions of an oil and gas field (1990), simulate and evaluate the risk of RMB depreciation in the Asian financial crisis, deny the opinion of RMB depreciation (1998), simulate and evaluate the epidemic situation of SARS in various climatic and geomorphic areas in China, put forward the countermeasures of disaster reduction by regions and stages (2003), simulate and evaluate the hardships and remoteness of China cities and counties, and put forward the subsidy policy for civil servants and teachers.

In 2000, Wang Zheng and his research team began to pay attention to the field of man-land relationship in global climate change. In 20 12, MRICES-20 12, with completely independent intellectual property rights, obtained the software copyright, which opened the R& computing tradition with the function of coordinating the relationship between man and land. The model includes GDP spillover, R&; Nonlinear dynamic mechanism modules such as D spillover, endogenous technological progress, financing and geotechnical engineering adjustment can evaluate various emission reduction schemes in real time and simulate various countermeasures. He was hired as a reviewer of the fifth IPCC report.