不同区域尺度产业转移实证研究及相关论争综述

从产业转移概念出发,对产业区域转移实证研究视角、研究方法以及不同区域尺度研究结果进行梳理。认为根据已有实证研究可以得出中国产业转移发生情况的基本结论:①中国在整体上以及东中西部和四大板块之间只有较少的相对产业转移并没有发生大规模的产业转移。②东中西部地区之间存在的产业转移主要是技术密集型产业从中西部转入东部,资源依赖型产业从东部转入中西部。③东部地带各省份之间的产业转移相对规模较大。④东部地带各省份内部的产业转移相对规模更大。⑤不同区域尺度上产业转移实证研究结果符合距离衰减规律。对国内产业转移实践引发的梯度理论、产业转移滞缓原因、政府参与产业转移作用的研究进行了梳理。最后提出未来研究的一些方向。     

Wissenstransfer durch Zentrenbildung. Physikalische Methoden in der Chemie und den Biowissenschaften

From the 1950s to 1970s, physical techniques replaced many classical methods in the chemical and biological sciences. In this development, a novel type of method‐oriented scientists emerged, relying on cooperation with instrument manufacturers and forging close links with science‐funding agencies. Their main engagement was the development of methods and the improvement of instruments, responding to the needs of the chemical and biomedical communities. In the United States, an important institutional locus of such method‐oriented scientists were instrument centers, providing service to regional and national groups of scientific users. This article analyzes the knowledge transfer involved in investigating the Biotechnology Resources Program of the National Institutes of Health, and presenting the example of one of these centers, the Stanford Magnetic Resonance Laboratory.     

GIS and the application of a model of pollen deposition and dispersal: a new approach to testing landscape hypotheses using the POLLANDCAL models

The recent advances in computer-based modelling of pollen dispersal and deposition through the POLLANDCAL (POLlen-LANDscape CALibration) network have enabled landscape simulations to be constructed and tested, both to validate the theoretical models, and to validate modelled landscapes using empirical data. This paper presents the first attempt to develop simulations based on real landscapes, by placing distinct vegetation communities using reclassified digital elevation models (combined slope and altitude data). The approach is tested by modelling a palynological signature for the expansion of mixed agriculture into an upland margin, and the results for 49 simulated pollen deposition sites, across an altitudinal range for a series of landscape scenarios, is compared with existing empirical data. The broad trends within the two data sets are in general accordance, and variation between them is attributed to local variation in vegetation heterogeneity. The results show that the POLLANDCAL models offer a new and exciting method by which sub-fossil pollen assemblages can be examined, theoretical models of landscape use tested, and will offer a significant tool in the interpretation of environmental data in archaeology, in particular when combined with GIS-based models of the physical environment.     

Regulating unemployment the Continental way: the transfer of municipal labour exchanges to Scandinavia 1890–1914

Statistical knowledge, insurance and labour exchanges constituted the principal elements in the policies developed to handle the new social problem of unemployment in the decades before 1914. Political transfer, the exchange of ideas, problems and policies between reformers all over the modern world, contributed heavily to the making of unemployment. This article analyses the introduction of labour exchanges, a German innovation, in the Nordic countries. Special attention is given to the different settings, both extra- and intra-Nordic, for transfer and cross-learning. The aspiration that the municipal labour exchange, providing a free and impartial service to both employers and workers, would reduce unemployment and social tensions explains its swift introduction.     

Morphological evolution of three‐dimensional chemical dissolution front in fluid‐saturated porous media: a numerical simulation approach

This paper is concerned with the morphological evolution of three‐dimensional chemical dissolution fronts that occur in fluid‐saturated porous media. A fully coupled system between porosity, pore‐fluid flow and reactive chemical species transport is considered to describe this phenomenon. Using the newly presented concept of the generalized dimensionless pore fluid pressure‐gradient, which can be used to represent the interaction between solute advection, solute diffusion, chemical kinetics and the shape factor of the soluble mineral, a theoretical criterion has been established to assess the likelihood of instability at a chemical dissolution front in the reactive transport system. To simulate the chemical dissolution front evolution in a three‐dimensional fluid‐saturated porous medium, a numerical procedure combining both the finite difference method and the finite element method has been proposed. As the problem belongs to a complex system science problem, a small randomly generated perturbation of porosity is added to the initial porosity of a three‐dimensional homogeneous domain to trigger instability of a planar chemical dissolution front during its propagation within the fluid‐saturated porous medium. To test the correctness and accuracy of the proposed numerical procedure, a three‐dimensional benchmark problem has been constructed and the related analytical solution has been derived. This enables using the proposed numerical procedure for simulating the morphological evolution of a three‐dimensional chemical dissolution front from a stable, planar state into an unstable, fingering state. The related numerical results demonstrate that the proposed numerical procedure is useful for, and capable of, simulating the morphological instability of a three‐dimensional chemical dissolution front within a fluid‐saturated porous medium.     

Tacit knowledge transfer via interlocking directorates: A comparison of Canada and the United States

This paper explores geography as a contributing factor to knowledge transfer among Canadian and American firms. We argue that the knowledge networks of the two countries are moving in opposite directions. Canada's network is converging into fewer cities while the American network encompasses a greater number of cities. When the knowledge networks of Canada and the United States are explored, national and local boundaries are found to impede the movement of corporate knowledge. Prior to our discussion on its spatiality, the concept of knowledge is introduced and its relation to individuals and firms of the Canadian and American corporate network is examined.     

A simple Bayesian approach to tree‐ring dating

Tree‐ring dating involves matching sequences of ring widths from undated timbers to dated sequences known as ‘master’ chronologies. Conventionally, the undated timbers (from a building or woodland) are sequentially matched against one another, using t‐tests to identify the relative offsets with the ‘best’ match, thus producing a ’site’ chronology. A date estimate is obtained when this is matched to a local master chronology of known calendar age. Many tree‐ring sequences in the UK produce rather low t‐values and are thus declared not to have a ‘best’ match to a master chronology. Motivated by this and the routine use of Bayesian statistical methods to provide a probabilistic approach to radiocarbon dating, this paper investigates the practicality of Bayesian dendrochronology. We explore a previously published model for the relationship between ring widths and the underlying climatic signal, implementing it within the Bayesian framework via a simulation‐based approach. Probabilities for a match at each offset are produced, removing the need to identify a single ‘best’ match. The Bayesian model proves successful at matching in both simulated and real examples.     

Evolution of Temperature and Moisture Fields in Charles Bridge in Prague: Computational Prediction and Measurements

Charles Bridge in Prague, founded in 1357, is one of the most prominent historical structures in Europe. It interconnects two Prague districts, the Lesser Town and the Old Town districts, separated by the Vltava River. In the past, the bridge underwent a variety of repairs and retrofits. Within the framework of the moderate repair carried into effect in 2007 to 2010, a measuring system was installed in the bridge, and the temperature and moisture content at selected gauge points have been continuously monitored for a period of 2 years. This article presents non-linear, fully coupled modeling of both fields utilizing a parallel version of the simple finite elements (SIFEL) computer code. Its cogency is validated against experimentally obtained data that serve as inputs for the second stage of a thermo-mechanical analysis—the detailed and mechanics-oriented simulations of the bridge as a whole.     

Thinking with Excerpts: John Locke (1632–1704) and his Notebooks

In his “Méthode nouvelle,” an anonymous article in the Bibliothèque universelle of 1686, John Locke described his way of collecting excerpts in notebooks and retrieving relevant entries. The well-known practice of entering textual passages in commonplace books sits uneasily with Locke's criticism of received opinion and authority. Is it possible that he used any of these notes to think with? I suggest that the conditions for this were provided by Locke's interactions with some of his notes, including those which recorded observations, testimonies and experiments. As well as labelling excerpts and other notes with topical Titles, Locke sometimes added precise bibliographical citations, transferred material across notebooks, interpolated his own signed reflections and queries, and (eventually) dated entries.     

Formation of Fluid Inclusions during Heat Treatment of Barremo‐Bedoulian Flint: Archaeometric Implications

At the end of the fifth millennium bc , the development of a specialized lithic industry in the Chassey societies of south‐eastern France and its dissemination as far as Catalonia and Tuscany attest to important socio‐economic changes in the Mediterranean Neolithic societies. The lithic production was made on barremo‐bedoulian flint that was heat‐treated to improve the sharpness of the tools produced. Microscopic observations of archaeological and geological, heated and unheated barremo‐bedoulian flint samples allowed us to highlight the heat‐induced formation of fluid inclusions. Microthermometry analyses showed that these inclusions contain pure H₂O, most probably resulting from the dehydration of length‐slow (LS) chalcedony and the closure of narrow pores, according to the model proposed by Schmidt et al. ( 2012 ). Our results enable us to estimate the heating temperatures used by Chassey artisans to ≈ 230°C. We also propose the ‘pressure cooker’ model to explain the migration of liquid water in flint nodules heated to 230°C. Then, we discuss the ability of a particular type of flint to be heat‐treated, and hence its value for Neolithic society, which depends on: (1) the amount of LS chalcedony that ensures the water release at relatively low temperature; and (2) on the total volume of porosity available to store the dehydration water.