◇◇新语丝(www.xys.org)(xys.dxiong.com)(xys.3322.org)(xys.xlogit.com)◇◇   如何认定国际热点论文   Zhengyf   最近因研究生开题的原因,进行有关文献检索,发现了一个问题,感到不解, 特在这里指出来,请知者解惑。   邵明安教授(现任西北农林科技大学资环学院院长)2000年在SSSAJ上发表 了一篇论文(M Shao, R Horton, 2000. Exact solution for horizontal water redistribution by general similarity,Soil Science Society of America Journal,64 (2): 561-564)。邵教授在多份材料里提到(参见网上资 料http://www.nsfc.gov.cn/nsfc/cen/00/kxb/dq/rcpy/200006_shaomingan.htm; http://cyc7.cycnet.com:8090/fair/bolanhui/person/person_content.jsp?p_ id=1747&a_id=127),该论文(以下简称邵文)是2000-2001年国际环境/生态学领 域20篇热点论文之一,且是我国唯一入选的一篇论文。   笔者由“ISI Web of Knowledge”检索知,迄今为止,邵文共被引用5次, 引用情况如下:   1. Deinert MR, Parlange JY, Steenhuis T, et al. Measurement of fluid contents and wetting front profiles by real-time neutron radiography ,JOURNAL OF HYDROLOGY 290 (3-4): 192-201 MAY 25 2004   2. Parlange JY, Lockington D, Sander G, et al. Comments on "Exact solution for horizontal redistribution by general similarity" SOIL SCIENCE SOCIETY OF AMERICA JOURNAL 65 (3): 957-958 MAY-JUN 2001   3.Shao M, Horton R. Response to "Comments on 'Exact solution for horizontal redistribution by general similarity' by Parlange et al." , SOIL SCIENCE SOCIETY OF AMERICA JOURNAL 65 (3): 958-959 MAY-JUN 2001   4.Youngs EG, Comments on "Exact solution for horizontal water redistributions by general similarity" , SOIL SCIENCE SOCIETY OF AMERICA JOURNAL 65 (3): 959-960 MAY-JUN 2001   5.Shao M, Horton R, Response to "Comments on an 'Exact solution for horizontal redistribution by general similarity'" , SOIL SCIENCE SOCIETY OF AMERICA JOURNAL 65 (3): 960-961 MAY-JUN 2001   其中除为他人引用1篇外,另外为他人的2篇评述与邵本人的2篇答复。E.G. Youngs 的评述认为邵文考虑不全面,否定的成分居多,其评述全文如下:   Comments on "Exact Solution for Horizontal Water Redistributions by General Similarity"   E.G. Youngs   One of the basic facts of soil water physics is the hysteresis exhibited in soil water relationships, particularly in the relationship between soil water content and soil water pressures (Haines, 1930). However, although this hysteresis has a profound effect on the distribution and movement of water in soils (for example, it plays an important role in retaining infiltration water near the soil surface, impeding downwards movement), it is given scant attention in soil hydrology. The redistribution of soil water after infiltration is the classic example usually cited for hysteretic soil water behavior (Childs, 1969). The note by Shao and Horton (2000) is therefore misleading by ignoring hysteresis in purporting to calculate redistribution profiles in soils. The authors seem to have been inspired by Philip's (1991) analysis of horizontal soil water redistribution from one infinitely long wet column into another infinitely long dry column. This was essentially a consideration of the behavior in a composite porous body consisting of two semi-infinite columns of a soil with different hydraulic properties and so did not address the true complex hysteretic behavior in soils where different parts of the soil profile are wetting and draining down different scanning curves of the soil water characteristic.   Horizontal redistribution soil water profiles after infiltration were presented by Youngs (1958a). He argued that the soil water diffusivity given by the product of the hydraulic conductivity and the slope of the moisture characteristic that was introduced by Childs and Collis-George (1950) in order to put Richards' equation in the form of a more easily solved nonlinear diffusion equation could not be used to analyze the soil water redistribution in such hysteretic situations. The change in slope of the moisture characteristic at a reversal gave a discontinuity in the diffisivity, so the mathematical convenience of introducing the soil water diffusivity is not achieved.   The experimental redistribution profiles presented by Youngs (1958a) showed the importance of hysteisis in their development. The case of the profile development after vertical infiltration is further complicated by the effect of gravity (Youngs, 1958b). In this case, it has been found that two different forms of profile development are possible, depending on the depth of infiltration and also on the texture of the soil. In one the profiles maintain approximately the general shape of the infiltration profile, whereas in the other desaturation at the surface occurs with a step-like advance of the wetting front below. The discussion has been further developed by Youngs and Poulovassikis (1976) and Youngs (1983)(1990).   Shao and Horton (2000) do not consider the situation of the redistribution of an initial infiltration profile but instead that of a given initial hypothetical region of uniform saturation. Even in this simpler case, hysteresis cannot be ignored. Thus it must be concluded that the analysis given in this paper is of little relevance to soil water redistribution but could be of interest in analyzing other processes described by a nonlinear diffusion equation.   Received for publication July 25, 2000.   笔者的问题是,如此引用情况,如何认为邵文是2000-2001年国际环境/生态 学领域20篇热点论文之一?进而一个更泛广的问题是“如何认定国际热点论文?” (XYS20051110) ◇◇新语丝(www.xys.org)(xys.dxiong.com)(xys.3322.org)(xys.xlogit.com)◇◇