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1.
What are people actually saying when they are talking and writing about the future? The paper rests on two premises; that the future is essentially a construct of human thought, and that one method of knowing the future is to carefully examine the language used when “the future” is being talked about. The 13 inaugural addresses of the U.S. presidents since 1933 are systematically examined for evidences of their author's future orientation. The paper provides both factual data about the future consciousness of our presidents over the past 50 years, and also demonstrates the use of linguistic analysis for forecasting the future.  相似文献   

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A logistic-based model for forecasting the rate of product diffusion given aggregate time series data was constructed. The model differs from earlier models based on fitting the logistic to aggregate data in that it includes a submodel to separate replacement demand from first-time sales. We fit the theoretical model to data and show that forecasts will be significantly more accurate using this model instead of the logistic curve.  相似文献   

3.
    
This study presents a plausible picture of development of solar thermal technology, using the learning and experience curve concepts. The cost estimates for solar thermal energy technologies are typically made assuming a fixed production process, characterized by standard capacity factors, overhead, and labor costs. The learning curve is suggested as a generalization of the costs of potential solar energy system. The concept of experience is too ambiguous to be useful for cost estimation. There is no logical reason to believe that cost will decline purely as a function of cumulative production, and experience curves do not allow the identification of logical sources of cost reduction directly. The procedures for using learning and aggregated cost curves to estimate the costs of solar technologies are outlined. Because adequate production data often do not exist, production histories of analogous products/processes are analyzed, and learning and aggregated cost curves for these surrogates estimated. If the surrogate learning curves apply, they can be used to estimate solar thermal technology costs. The steps involved in generating these cost estimates are given. Second-generation glass-steel heliostat design concept developed by MDAC is described; a costing scenario for 25,000 units/year is detailed; surrogates for cost analysis are chosen; learning and aggregated cost curves are estimated; and the aggregate cost curve for the MDAC designs is estimated. The surrogate concept of cost estimation combines qualitative steps, which are highly subjective, with quantitative techniques, which require thorough knowledge and understanding to justify their use. As such, the results, interpretations, and inferences must be qualified by an understanding of the process by which they were developed. The method of surrogate learning curves had limitations in both the data acquisition and data analysis phases of activity. Improvements in the validity of cost data and in the task used for this type of study are necessary to enhance the reliability of unit cost predictions resulting from this technique.  相似文献   

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This article offers a forecast of the effects that advances in office automation technology will have on clerical employment in the banking and insurance industries for the period 1985–2000. A new forecasting approach, intended to account more directly for technological change, was developed for the study and is described. Clerical employment in both industries is estimated to peak about 1990 and decline rapidly during the following decade. Under the most conservative assumptions, absolute reductions in clerical employment of 22% in insurance and 10% in banking are expected by 2000. As a preliminary validation of the method, these results are compared to employment forecasts generated independently by executives in the two industries and to the results of other recent employment forecasts.  相似文献   

5.
In a 1980 study, an attempt was made to provide some degree of quantitative precision to the term “state-of-the-art” by developing an SOA measure for computers and antibiotics. This study expands on the convention developed in the earlier work and applies the approach to five technologies: aircraft turbine engines, high-temperature materials as used in blades and vanes, manmade fibers, farm tractors, and coal gasification. Satisfactory state-of-the-art measures were developed for aircraft turbine engines and high-temperature materials, and the maturity of farm tractor technology was confirmed. The convention also revealed that manmade fiber technology has been in a refining mode since the introduction of nylon. Coal gasification has not gained enough commercial experience to merit a state-of-the-art measure.  相似文献   

6.
    
In this article, a model of technology price estimation is developed. The process of trade in technology is seen as resulting in a partial transfer of the market in which the seller of the technology had previously sold his product to the buyer of the technology. Profit decrease of the seller because of market cuts is taken as the basis for the pricing of technology. The random nature of the useful lifetime of the technology is taken into account, and the influence of seller-firm characteristics on the technology price is analyzed.  相似文献   

7.
    
The use of growth curves in technological forecasting usually employs an equal weighting of all data points in the time series. This paper considers the benefits of weighting recent information more heavily through the utilization of discounted least squares. The method is used to model the growth of the percentage of households with CATV; discounting gives better results for short-term forecasting.  相似文献   

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It is by now a commonplace to say that today the world is in the midst of a revolution as profound as any we have ever experienced. It is, however, much less of a commonplace to specify precisely of what this revolution consists. The contention of this article is that the revolution is more than a mere shift in our industrial or technological base. Fundamentally, it is a change in underlying mental attitudes—how we conceive of the world. It is thus a shift in our values but at the same time much more basic than this alone.This article describes the nature of the change that is occuring in mental attitudes. However, it does not do so in a traditional way. Primarily, it does it by means of a fable. The reason is that the shift we are experiencing is also in part a shift in our aesthetic vision, that is, in the styles of discourse that we use to describe reality. In short, different conceptions of the world require different stylistic forms. The full nuances of a new era can not be captured by the forms of the past.  相似文献   

10.
    
This paper models cooperative R & D involving the university, the government, and the firm, using a linear programming format to determine the optimal cooperative structure or, “Who does what?” Both prime and dual are discussed. Sensitivity and simulation techniques are discussed as analytical tools to evaluate the effect of uncertainty and returns to scale on the optimal mix or structure of cooperative R & D. The value of the approach is both heuristic and analytical. Some problems and limitations of the approach are discussed briefly.  相似文献   

11.
    
This paper examines recent occupational projections in order to determine how new technologies will affect future job growth in the United States. The first part of the paper reviews the methodologies used to derive occupational projections, focusing on how adjustments for technological change are incorporated into the forecasts. The second part of the paper reviews the most recent projections produced by the U.S. Bureau of Labor Statistics and compares them with projections produced by other organizations. The results reveal that neither high-technology industries nor high-technology occupations will supply many new jobs over the next decade. Instead, future job growth will favor service and clerical jobs that require little or no postsecondary schooling and that pay below-average wages.  相似文献   

12.
A multidisciplinary team of biologists, economists, engineers, planners, and sociologists were assembled to do an ex-post facto analysis of a flood control reservoir ten years after initial operations. Within the context of a research university, the authors suggest ways to 1) improve project administration, 2) combat disciplinary chauvinism, 3) facilitate the understanding and exchange of data across disciplines, 4) reward the work of graduate students in a fair and equitable manner, and 5) assist the principal investigator in achieving the goal of an interdisciplinary study. The importance of project associates in the day-to-day operation of the study is reviewed in detail.This paper details the administrative problems of the University of Illinois' interdisciplinary effort to examine the “real” environmental impacts of the Lake Shelbyville reservoir 10 years after it had begun operation. Lake Shelbyville is a U.S. Army Corps of Engineers reservoir located in east-central Illinois. Land acquisition began in 1962 and the reservoir was in operation by 1971. While not implying that “apples and oranges” don't mix, problems do result when we try to bring together a group of disciplinary researchers. We write with the hope that the suggestions outlined here will keep environmental impact assessment research interdisciplinary. One of the reasons for the present “environmental fix” is the single discipline approach to environmental problems.A true interdisciplinary effort is necessary for a comprehensive assessment of the impacted physical and social environments, yet “interdisciplinary” can easily become a false label. If the principal investigator and researchers are not attentive to project administration on a day-to-day basis, the old saying about integrating findings “with a staple” can easily result. Rather than integrated assessment, the study report may resemble a series of miniature discipline based projects that read like the list of university departments.  相似文献   

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Pseudoplanning     
The tactics used by sponsors to manage a planning process is an important cause of plan failure. When the process is manipulated or its management ignored, pseudoplanning results. Several case studies were analyzed to identify types of pseudoplanning. They are called, “What's the problem,” “omnipotent planners,” “transported ideas,” “pooled ignorance,” “do it my way,” “change as given,” “surrender,” “takeover,” “sciencism,” and “empty phases.” Each is described to point out how they led to poor planning practice.  相似文献   

16.
In an attempt to forecast the shape of economics in the year 2001, a Delphi study was undertaken, involving over 200 professional economists from 18 different countries. The end result was a list of 28 breakthroughs thought likely to occur in the next 20 years. The paper describes each breakthrough in detail, the process by which consensus and dissent were communicated, and the method used to select the panel of experts surveyed. Although the overall outcome of the study can be interpreted from several perspectives, one inescapable impression that emerges is that the liberal tradition in economics is latent but not dead, or equivalently, that the present conservative drift in the discipline is likely to be shortlived.  相似文献   

17.
It is argued that the appropriate criteria for evaluating large-scale long-range societal (or “world”) models differ significantly from the criteria that are appropriate for short-range econometric models or for small “toy” models. World models are designed to elucidate major societal problems arising from the interaction of many loosely connected factors—demographic, economic, technological, and environmental—that can be safely neglected in short-range extrapolative models. World models are also intended to explore the implications of long-range policy alternatives. Consequently, it is important that world models be phenomenological, rather than statistical, and they must “capture” the essence of some inherently nonlinear phenomena. This implies achieving qualitative realism without imposing an unwarranted assumption of causal determinism. Unfortunately, the mathematical characteristics of large nonlinear systems may essentially preclude meaningful long-run forecasts.  相似文献   

18.
    
This paper presents an econometric analysis of the diffusion of the sulfate pulping process throughout the U.S. pulp and paper industry. A dynamic equilibrium, Gompertz diffusion function is employed to derive a multivariate estimation model which incorporates more information than the traditional approach of estimating the growth rate function alone. The empirical results suggest that the econometric approach provides a useful integration of the technological diffusion process and the comparative static theory of demand. The sulfate pulping process is projected to continue capturing market share at a relatively rapid rate, and could account for 90% or more of total U.S. woodpulp production by the year 2000.  相似文献   

19.
    
Government involvement in the innovation process, both direct and indirect, is introduced into a standard innovation time-cost trade-off model. Different forms of involvement are treated and each form entails cooperation between the firm and the government. The optimal development time (or project completion date) is determined and analyzed parametrically. This analysis produced five hypotheses concerning the effect of government involvement on the timing of innovations. Selected empirical applications (or tests) of the hypotheses are presented and then concluding remarks are made.  相似文献   

20.
    
In this paper, we develop a methodology for approximating the market penetration potential for electric vehicles (EVs). The model is dynamic in nature and explicitly accounts for the competitive effects of conventional vehicles. Unlike many previous models, it does not require an estimation of the time required to achieve a 50% market share. Instead, the model allows one to endogenously determine the rate of market penetration, as well as the ceiling level. We note that some electric vehicle characteristics limit marketability to consumers unaffected by the disadvantages associated with operating EVs. These characteristics are accounted for in the model by the use of a substitution index. The addition of the substitution index allows one to explicitly account for variations in prices, climate, and geographic contour, all of which affect market potential. Electric vehicles are expected to result in positive social benefits by way of reduced pollution emissions and because of the concomitant decrease in the consumption of gasoline that market adoption would bring about. However, the social benefits will not be captured in the market and will not, therefore, encourage the use of these alternatives to conventional vehicles. This means that the rate of adoption of electric vehicles will be slower than is socially optimal, which is a potential argument for government subsidies for electric vehicles. In this paper, we explore a method for analyzing the benefits associated with the adoption of electric vehicles.  相似文献   

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