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Focusing on the topic of model integration, we develop a Workflow-based Spatial Modeling Environment (WF-SME) which enables scientists and modeling users easy to design and create of complex systems models through a drag-drop operation or editing mathematical formula in model constructor. WF-SME, a visual integrated modeling environment is mainly used for the rapid realization of model dynamic integration,...
Most of the researches discussed the evaluation of hotel performance emphasized the operational efficiency and resources usage. The discussions about the ability to fulfill customer needs and to increase utilization of the services provided by a hotel are relatively rare. This study applies Data Envelopment Analysis (DEA) model to evaluate both efficiency and effectiveness of the international tourism...
The ecological footprint (EF) analysis is a quantitative method to assess the sustainability of regional development. On the basis of the theories and methodology of EF, the procedure and the relevant models were developed for estimating the cumulative changes of ecological capacity caused by sea reclamation. And then they were applied to the case study of Xiamen Western Bay based on the calculation...
In order for cognitive robots to act adequately and safely in real world, they must be able to perceive and have abilities of reasoning up to a certain level. Toward this end, performance evaluation metrics are used as important measures to achieve these goals. This paper intends to be a further step towards identifying common metrics for task-oriented human-robot interaction. We believe that within...
To the fact that the labor productivity of large scale operation is too low in our country this paper expands Solow's model and use cross section, pool, (fixed effect) panel data model to carry on empirical analysis. All the results indicate fertility rate and human capital have important influence on labor productivity of the agricultural large scale operation. Through reducing rural fertility rate...
Software engineering processes are the steps which aim to produce software that meet the demand and achieve the goal of the project. It includes the development process, testing process, operation process, maintenance process. These processes cover the requirements, design, implementation, verification and maintenance and other activities. Effective software engineering is an organic combination of...
Reciprocity in the workplace makes it possible for employers to motivate their workers to put forward more effort than the minimum requirement. Unfortunately, nor can employers feasibly motivate worker effort in the long term by means of paying more than the market-clearing wage due to the “evaporating” nature of workers' gratitude from a pay rise. The mathematical model in this paper further proves...
This paper empirically investigates the impact of technology transfer which consists of imports of technology and purchase of domestic technology on total factor productivity for a cross sectional sample of large and medium-sized industrial enterprises by 30 major provinces or regions in China. The possible determinants of total factor productivity are sought with special focus on technology transfer...
The gas producivity is infuluenced by many factors. In the routine calculation of gas productivity, many factors were negelected for convenience such as the non-Darcy flow, the changes of gas PVT parameters and the deformation of rock media. In order to analysis the effect of these factors on gas productivity, the mathematical model of high speed non-Darcy unstable flow in deformed media gas reservoir,...
In view of the contradiction of the "Labor Shortage" occured in the eastern costal cities of China and surplus rural labors existed in western regions, this article conducts an empirical analysis of rural labor mobility factors of all regions based on panel data, and compares the impact of various factors to get further results. In order to guarantee the quality of results, cointegration...
In this paper, a fuzzy logic model was created from a data set of 140 small programs developed with practices based on Personal Software Process (PSP) and then this fuzzy model was applied for predicting the productivity of a new data set consisted of 60 small programs; all programs were developed with object oriented programming languages by 35 and 15 graduated programmers respectively. Accuracy...
This paper deals with the development of a System Dynamics Model to optimize the stock in production and distribution points of a manufacturing supply chain. The variables of study include production start rate, work in progress, production rate, distribution inventory, distribution rate, and waste rate. The results depict that increase in stock reduces the load on production variables, accordingly...
The mathematical model of transient flow considering threshold pressure gradient in vertically fractured multi-well system of reservoir with arbitrary shape is developed and solved by using finite element method. And the behavior of the bottomhole pressure varying with time is obtained. Then wellbore storage coefficient and skin factor are introduced by means of Laplace Transformation and Stethfest...
By using the elliptical flow model and the law of mass conservation, this paper presents a mathematical model for transient flow of a well with a finite-conductivity vertical fracture in low-permeability naturally fractured reservoirs. Effects of threshold pressure gradient are considered. Type curves of productivity performance are generated. Effects of threshold pressure gradient, storage capacity...
The hydrocarbon deposits have stimulated worldwide efforts to understand gas production from hydrate dissociation in hydrate reservoirs well. This paper deals with the potential of gas hydrates as a source of energy which is widely available in permafrost and oceanic sediments. It discusses methods for gas production from natural gas hydrates. Authors provide a detailed methodology used to model gas...
Formal verification has matured considerably as a verification discipline in the past couple of decades, becoming a mainstream technology in industrial design and verification methodologies and processes. In this paper we chronicle the evolution of formal verification at IBM from being a specialized side activity with a narrow focus, to achieving a broad-based usage as a core verification technology...
This paper aims to introduce the potential of practical application of system simulations in establishing the areas of potential internal control weaknesses using an example of the software development company. The emphasis is placed on practical application of these methodologies in business environment.
This paper used data envelopment analysis (DEA) to evaluate the operational performance of international tourist hotels in Taiwan from 2003 to 2007 by combining operational and financial variables. In this paper an innovative DEA two-stage procedure proposed by Simar and Wilson was used. In the first stage, a DEA model was used to estimate the efficiency scores of hotels. While in the second stage,...
Manual assembly production systems are still the most viable method for production a variety of products in small to medium batches. However, manual assembly work is often associated with ergonomically poor conditions that result in Work Related Musculoskeletal Disorders WRMDs, which result in low productivity and quality problems. Yet ergonomics is not often considered sufficiently precise during...
The research tries to give response to a question that all Venezuelan people constantly ask: are economic resources of the nation well administered? Based on this question, we realize a study on the efficiency and the productivity of the State in the use of the gross domestic product (GDP) for generating social welfare, to increase the economic levels of the country and to cancel the foreign debt...
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