The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
This paper presents a simulation model for assessing the mutual impacts of Engineering Change Management (ECM) process and New Product Development (NPD) process on each other. The discrete-event simulation model incorporates ECM into an NPD environment by allowing Engineering Changes (EC) to compete for limited resources with regular NPD activities. The goal is to examine how the relative size and...
Based on Malmquist Productivity Index and the data of 29 provinces of China within the period of 1991-2007, this paper decomposes the changes of TFP (TFP-ch) into technical changes (TECH-ch) and technical efficiency changes (TE-ch), and makes a further analysis on the convergence of technical efficiency among different sections. The conclusions are as following: (1) In all of the eastern, mid and...
This paper builds on a new methodology of modeling linear schedules with singularity functions. These unique functions have been used successfully for criticality and float analyses. The approach is extended to deriving one flexible equation for the complete resource profile of a schedule, including any changes in the resource rates of activities. A subsequent equation describes the first moment of...
Looking back to the development of productivity, we could find that mathematical innovation is the powerful drive that promotes the development of advanced productivity. With the upcoming of information industry and high technology industry, mathematics has become a kind of science and technology, and a primary productive force. The development of advanced productivity needs a great number of innovative...
Energy and environmental sustainability is a major global trend for the 21st century. Thermal discomfort and poor air quality in office buildings can result in loss of productivity, absenteeism and medical problems. The most frequently identified causes are related to inadequate ventilation and contaminants from indoor sources. Task ambient air conditioning aims to provide each occupant with personalized...
This article uses panel data of 2000-2006 years to analyze the FDI technology spillover to the private enterprises in Jiangsu province. The results indicate that the foreign enterprises have exerted a positive technology spillover to private enterprises in Jiangsu province. The bigger of foreign capital proportion and the fixed-assets are, the more spillover has. As far as the factors to the output...
Recent trends show that Colombian S&T performance is improving rapidly. This paper examines the ways in which International Scientific Collaboration, as observed by the co-authorship of journal articles written by local scientists and partners located overseas, affects the ability of research teams to produce bibliographic outputs and to contribute to local knowledge. A sample of 672 teams was...
Timber harvest planning deals with selecting a forest area to harvest in a particular time period take into consideration both economic and environmental issues. The problem has been modelled using unit restriction approach and area restriction approach. An optimal or a feasible harvest schedules subject to adjacency constraints is generated using exact methods or meta-heuristic optimization techniques...
In the paper, the exact definition of thermal value was proposed and the mathematical model of effective utilization degree of energy in batch-type heating furnace was developed to give the thermal value equations derived from Stalk's formula. It was achieved that the heat attached on the steel slab injected into the batch-type furnace uniformly would have higher thermal value when the intake time...
The human capital (HC) is the most important capital in the knowledge-based economy time, and the HC operations have certain impacts on enterprise performance. Based on the analysis of HC, HC operation and enterprise performance as well as literature research, the paper proposes the hypothesis of four dimensions of HC operations on effect of enterprise performance and constructs a structural equation...
Increasing the supply of public goods to rural areas is a crucial step to promote the construction of a new socialist countryside, which is a major historic task in China's modernization. Therefore, it bears great policy implication to find out how the government should control the investment in countryside and which public goods should be given priority in order to make full use of the limited government...
Based on existed theory of knowledge management, this paper chooses the large and medium enterprises in Heilongjiang as subjects. The questionnaire that involves more than 100 enterprises is made whose results are analyzed by Structural Equation Model (SEM) in terms of large sample analysis. Consequently, this paper establishes tests and modifies the effecting factors model of knowledge management...
Taking highly cited scientists in the field of molecular biology & genetics and physics as a case study, and with the method of scientometrics, this paper studies the age distribution at the time of publication of these scientists (called the publication age distribution), with the conclusion that these scientists publish most of their articles mainly between the age of 40 and 55 (called middle...
This paper analyzes the growth trajectory of communication, computer and other electronic equipment (CCEE) industry over the period of 1991-2006 by Simple Logistic Growth Model and Bi-logistic Growth Model, the analytical results indicate that there are two different growth trajectories among them. The sub-industries belonging to the second trajectory have Granger Casualty relation with software industry...
This paper examines the interindustry and intraindustry knowledge spillover effects of multinational enterprise (MNE) A model on interindustry and intraindustry knowledge spillover equation is proposed based on the model of Mankiw(1992) and applied to a panel dataset of 15 high-tech industryies from 1997 to 2006.The estimates show that there exists significant interindustry and intraindustry knowledge...
The advantages of U-shaped lines, such as improving productivity and quality, are very well known in industry. In many factories, traditional straight assembly line configurations were switched to U-shaped layouts in the past few years. U-shape line balancing problem (ULBP) is received more and more people attention. In this paper, an effective heuristic is proposed for solving type 1 of the fuzzy...
The natural grasslands play a significant but poorly recognized role in the global carbon cycle. Research on NPP of grassland ecosystems is and will continue to be important. In this respect, climate-vegetation models have been drawing much attention and widely applied internationally owing to its simplicity. Grassland types and their distribution pattern could be corresponded with certain climatic...
In order to solve the problem of determining the optimal customizing point under customer's requirement of customizing different kinds of product, with the supply chain covering product life cycle as research object, according to different positions from which the customizing action begins, three types of supply chain when customer order decoupling point (CODP) positioning at manufacturing, assembly...
The aim of this paper is to develop an analytic representation of Chinese labor productivity as a function of various classic and newly considered parameters. Its econometrics-based approach uses an elaborated version of the Cobb-Douglas production function, and includes both classic parameters (capital, labor ratio, average firm size, time) and new ones (proportion of output produced by enterprises...
Nowadays, after a lot of evolution in software engineering area, there is not yet a simple and direct answer to the question: What is the best software productivity metric? The simplest and most commonly used metric is the SLOC and its derivations, but these are admittedly problematic for this purpose. In another way, there are some indications of maturation in this topic, the new studies point to...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.