oalib

OALib Journal期刊

ISSN: 2333-9721

费用：99美元

投稿

时间不限

( 2673 )

( 2672 )

( 2024 )

( 2023 )

自定义范围…

匹配条件： “Jiuju Liu” ，找到相关结果约100709条。
列表显示的所有文章，均可免费获取
第1页/共100709条
每页显示 条
Pathfinder-Based Simulation and Optimization of Evacuation of Large Commercial Complexes  [PDF]
Jiuju Liu, Shuhan Li
Journal of Building Construction and Planning Research (JBCPR) , 2023, DOI: 10.4236/jbcpr.2023.112002
Abstract: Large commercial complexes are large in scale, complex in function, and located in densely populated areas that are prone to casualties due to unfavorable evacuation. To comprehend the safety evacuation of large commercial complex buildings in China, investigate the safety evacuation problems encountered during the evacuation process and the evacuation optimization design strategy, the paper uses Pathfinder to build a simulation model based on literature research and study to simulate the evacuation of personnel in a large commercial complex in Dalian and explore its problems during the evacuation process. The results show that the type of personnel has an effect on the large commercial complex’s evacuation simulation results; the total number of evacuees is non-linearly correlated with the time change curve; some staircases take a long time to evacuate and have a low utilization rate. To improve evacuation efficiency, optimization suggestions for safety exits, evacuation stairs, and evacuation channels are made based on the results.
Modern Heritage Investigation and Conservation: A Case Study of Taiyanggou Block and Lvshun Industrial School Site  [PDF]
Liang Lang, Shiyuan Wang, Hui Yu, Jiuju Liu
Journal of Building Construction and Planning Research (JBCPR) , 2018, DOI: 10.4236/jbcpr.2018.63009
Abstract: Modern buildings and blocks in open port city, which are an essential part of the urban context, possess unspoken values of material properties and cultural resources for the urban future. According to the investigation of Taiyanggou Block and Lvshun Industrial School Site in Lvshun (China), this paper aims to discuss the understanding and conservation of modern heritage. Firstly, it interprets the opening of modern Lvshun and the formation of Taiyanggou Block to provide the fundamental knowledge. After a brief introduction of Lvshun Industrial School Site, the paper analyzes the problems in conservation practice and proposes countermeasures on heritage management and reuse strategy. Finally, it indicates that to conserve modern heritage means to preserve and to enhance their integrated values of space and culture in the framework of local development.
Theoretical Derivation of Thermal Value Equations for Heating Furnaces  [PDF]
Hainan Wu, Wenqiang Sun, Jiuju Cai
Open Journal of Applied Sciences (OJAppS) , 2012, DOI: 10.4236/ojapps.2012.22014
Abstract: Based on thermal value theory, the aim of this paper is to deduce the theoretical formulas for evaluating the energy effective utilization degree in technological pyrological processes exemplified by metallurgical heating furnaces. Heat transfer models for continuous heating furnaces, batch-type heating furnaces, and regenerative heating furnaces are established, respectively. By analyzing the movement path of injected infinitesimal heat attached on steel or gas, thermal value equations of continuous, batch-type, and regenerative heating furnaces are derived. Then the influences of such factors as hot charging, gas preheating and intake time of heat on energy effective utilization degree are discussed by thermal value equations. The results show that thermal value rises with hot charging and air preheating for continuous heating furnaces, with shorter intake time when heat is attached on steel or longer intake time when heat is attached on gas for batch-type heating furnaces and that with more heat supply at early heating stage or less at late stage for regenerative heating furnaces.
Municipal solid waste disposal by using metallurgical technologies and equipments
Jiuju Cai, Wenqiang Sun
International Journal of Energy and Environment , 2012,
Abstract: Pyrolysis of municipal solid waste can take full advantage of energy and resource and avoid producing hazardous material during this period. In combination with mature metallurgical technologies of coking by coke oven, regenerative flame furnace technology and melting by electric arc furnace, technologies of regenerative fixed bed pyrolysis technology for household waste, co-coking technology for waste plastic and blend coal, and incineration ash melting technology by electric arc technology for medical waste were respectively developed to improve current unsatisfied sorting status of waste. The investigation results of laboratory experiments, semi-industrial experiments and industrial experiments as well as their economic benefits and environmental benefits for related technologies were separately presented.
Smooth-operating point and theoretical analyses of unsmooth operation in pyrological processes
Wenqiang Sun, Jiuju Cai, Fangmin Quan, Shizheng Ren
International Journal of Energy and Environment , 2010,
Abstract: To emphasize the role of heat loss in energy conservation, this paper introduces smooth operation principle. By least square method, the smooth-operating point (SOP) formula of fuel gas with definite composition and temperature is deduced, which is then used to analyze changes in heat effect when injecting heat at unsmooth-operating point (UOP), educe allocation regulations of heat effect in furnace, and study the heat loss resulting from unsmooth operation. It indicates that for fuel gas with definite composition and temperature, the SOP is unique and there is no heat loss if injecting heat at SOP. With regard to unsmooth operation, low UOP is better than a high one.
The Model of Mobile Knowledge Services System in the Management of Complex Cluster Project  [PDF]
Yong Liu, Bingxin Liu
iBusiness (IB) , 2011, DOI: 10.4236/ib.2011.31006
Abstract: Cluster projects are projects of large-scale or with huge investment, such as Beijing 2008 Olympic Games and Shanghai 2010 Expo. A lot of on-site management works are involved in the process of cluster project management, especially the treatment of sudden accidents which would produce plenty of knowledge and experience. As cluster project on-site management spots change frequently, knowledge produced by mobile workers in the process of on-site management is hard to be saved into the knowledge repository on time. It may cause a knowledge distortion or even missing. On the other hand, in the process of cluster project management, a lot of knowledge is required by on-site workers to deal with on-site activities. However, due to lack of effective mechanisms for knowledge communion, they often face the risk of making wrong decisions. To solve the problems of knowledge management and acquisition in the process of cluster project on-site management, this paper presents a system model for mobile knowledge service.
The Collusion Deterrence with Prisoner’s Dilemma  [PDF]
Aidong Liu, Jinfang Liu
Journal of Service Science and Management (JSSM) , 2010, DOI: 10.4236/jssm.2010.34053
Abstract: I tried to present a new method to prevent collusion through employing two auditors at the same time and inspiring them provide true report by exploiting their prisoner’s dilemma. But I found this method cannot be put into practice because of the high cost. So I analyzed whether sending the second auditor in a probability, a low cost method, can deter the audit collusion. I find sending the second auditor in a probability, enforcing the rigidly lawful punishment and perfecting the reward mechanism can prevent audit collusion. I also find the auditor’s ethical constraint do good to prevent collusion and the charger of state assets management can play the same role as the real owner of the state-owned enterprise in deterring collusion. This finding provides theory support for the government to implement the publicly audit bidding and random double auditing system on state-owned enterprise. The supervision of PCAOB on auditors is also the operation of this theory.
Using Insulation in China’s Buildings: Potential for Significant Energy Savings and Carbon Emission Reductions  [PDF]
Guoliang Liu, Hans Liu
Low Carbon Economy (LCE) , 2011, DOI: 10.4236/lce.2011.24027
Abstract: Most old residential and commercial buildings in China are not insulated or not to new standards. This is true even in regions with very cold winters or regions with very hot summers. The insulation in new buildings is very poor relative to North American standards. However, insulating the exterior walls, attic roofs, and foundation walls to new standards of buildings in China would reduce the need for heating and air conditioning, and thus would save roughly 200 million tons of coal each year. This in turn would lead to a reduction in CO2 emissions of about 510 million tons per year, which is equal to about 8.4% of China’s total carbon emissions in 2006. The use of insulation in buildings will help homeowners save money, help China save energy and help the environment all at the same time. Insulation will provide a continued payback to the homeowner, not only in dollars and cents, but also by providing a more enjoyable and comfortable living environment for many years.
An Elementary Introduction to Training the Postgraduates for Professional Degrees in Oil and Gas Engineering  [PDF]
Qingyou Liu, Zhibin Liu
Creative Education (CE) , 2012, DOI: 10.4236/ce.2012.326126
Abstract: The demand of the talents in petroleum engineering of petroleum enterprises is analyzed in this paper according the current situation of the engineering education. The four levels of the professional talents needed by the petroleum enterprises are specified, which makes it clear that what the purpose and orientation of the higher education in petroleum engineering should be. The qualities of the petroleum engineers are discussed specifically and it is pointed out that the training of the postgraduate for professional degree in oil and gas engineering should be the cradle of the petroleum engineers. A training schedule is listed in this paper based on the discussion, including curriculum provision, practice link, thesis and training mode, which will be a pathfinder of the education of the professional degree graduate student in oil and gas engineering. Moreover, the practice can provide useful experience for the training and education of different type of graduates.
Overall Framework and Module of Distribution Network Coordinated Planning Considering Distributed Generation  [PDF]
Qianjin LIU, Huanghuang LIU
Engineering (ENG) , 2013, DOI: 10.4236/eng.2013.51B006
Abstract: Combining with the characteristics of China's energy and the strategy of sustainable development, analyzing the pros and cons which caused by the appearance of DG and their operation connecting to grid, this paper points out that the two sides can achieve win-win under a reasonable combination between DG and distribution system, so as to optimize the allocation of resources, improve the utilization ratio of resource, and obtain maximum social benefit, harmoniously promote the development of power industry, economy and environment. As a word, this paper puts forward a new model of distribution network planning including DG and brings in penalty factorto guide the investment and construction of DG. Last of all, this paper presents the adoption of the coordination development coefficients which is to evaluate the power planning.
第1页/共100709条
每页显示 条


Home
Copyright © 2008-2020 Open Access Library. All rights reserved.