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.
Steam pipelines play an important role in industrial enterprises. They joint the heat producer and users, and constitute the energy transmission networks. The total cost on steam pipelines include the expense of steel and heat insulator, converted expense of heat loss, and construction cost. This study develops a mathematical model of total cost on steam pipelines with golden section algorithm. The...
Recent work has shown that resonate-and-fire model is both computationally efficient and suitable for large network simulations. In this paper, we examine the estimation problem of a resonate-and-fire model with random threshold. The model parameters are divided into two sets. The first set is associated with subthreshold behavior and can be optimized by a nonlinear least squares algorithm. The other...
This paper measures companies' credit risks and qualitatively analyzes the relationship between credit risks as well as capital structures by calculating the distance to default of listed companies. It draws a conclusion that the corporate credit risk correlates closely to corporate capital structure ratio. The more liabilities of a company are, the less possibility for it to repay its debt will be,...
A simplified simulation approach has been introduced for gated field emitters. F-N equation fitted with experimental field emission characteristic is used to calculate the characteristics of a double-gated field emitters. By assuming the cathode is a flat thin film, the anode current and gate current are simulated. The validity of the simulation is evaluated by experimental results.
This paper describes improvements in three-dimensional environment, a set of numerical models for the simulation of natural object (e.g. sun, cloud, light). We take into account the direct solar and simulate an animated sun in 3D environment. In this environment, we create a cloud layer hemisphere with animated procedural clouds. The scene allows the computation of some classical parameters (such...
Based on the analysis of the modern manufacturing and bio-pharmaceutical engineering experimental education, we put forward the basic ideas of innovation and management of biotechnology education highlands and preparations engineering laboratory: balanced engineering group as the guide, complete product as a link, tiny model manufacturing as a base, high technology animal and plant medicines as a...
The planned failure and recovery is largely overlooked in the traditional service recovery literature. The purpose of this study is to establish a process-by-outcome framework suitable to gain the understanding of the impacts of critical factors on customers' satisfaction in the planned failure. These are achieved by proposing a theoretical classification framework using the content analysis method...
The purpose of this paper is to discuss the sustainable development in China by building a theoretic model based on the R&D model. A major difference to the former models is that the model presented here considers exhaustible energy, pollution control which are endogenously determined. The method of optimal control is employed to obtain the balance growth solutions. The Results show that a dynamic...
To date, optimization models of uncertain endogenous technological change models commonly add cost resulting from overestimating technological learning rates into an objective function with a subjective risk factor. This paper explores two risk-constrained stochastic optimization methods for dealing with uncertain technological learning with a simplified energy system model. The model assumes one...
This paper developed a hypothesis to overcome the disadvantage of the binary logit model used in resident trip generation. It proposed that random parameters beta' obeyed some distribution firstly. Combined the characters of trip generation and observable variables, it then put forward that beta' followed log normal distribution. The hypothesis was validated by demarcating the parameters in SAS software...
As for the multi-attribute decision-making problem, most common methods used based on AHP are imprecise and complicated for taking weights of indices into account. The paper introduces game theory avoiding the discussion of weights which are inevitable in the normal decision-making model like AHP, DEA, and ANP, FUZZY and so on. Then it combines grey theory to establish a grey game theory model to...
This paper aims to compare three models in terms of development policies, development potentials and operational mechanism by evaluating, identifying and choosing the best one to meet the needs of tourism development and management in the nonoptimal tourism districts (NTDs). The methods of Participatory Rural Tourism Appraisal and Analytic Hierarchy Process are employed to collect the necessary data...
Given the churning masses of congestions in most cities, a better understanding of the relationship between car use and urban characteristics in China is essential to traffic planning. Based on the travel data collected in 40 cities in China, this paper empirically explores how urban characteristics (city economy, urban density, urban size and urban form) affect the car use such as the car travel...
Public transportation priority is the most effective way to improve the efficiency of the public transportation which is the most important part of the urban transportation. For the choice of the public transportation priority, the methods usually used now in China are not very imprecise for consideration of the indices' weights. The paper introduces game theory and sets up the choice model for the...
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.