Simulation is a powerful technique in evaluating and improving the performance of complex systems.In order to improve the efficiency of simulation experiment design,analysis and evaluation,auxiliary tools are required...Simulation is a powerful technique in evaluating and improving the performance of complex systems.In order to improve the efficiency of simulation experiment design,analysis and evaluation,auxiliary tools are required.Unfortunately,existing tools are usually not meeting the requirements of simulation.Moreover,the restricted interfaces,reusability and expandability influence their efficiency to a certain extent.In this paper,an integrated software environment,HIT-SEDAES,is designed for solving these problems.A process model of simulation experiment design,analysis and evaluation is introduced to guide the development of the software environment.And several solutions are proposed to solve key problems in this development.Finally,an application is used to illustrate how the software environment works for the problems of model validation,effectiveness evaluation and performance analysis.展开更多
Background Most existing chemical experiment teaching systems lack solid immersive experiences,making it difficult to engage students.To address these challenges,we propose a chemical simulation teaching system based ...Background Most existing chemical experiment teaching systems lack solid immersive experiences,making it difficult to engage students.To address these challenges,we propose a chemical simulation teaching system based on virtual reality and gesture interaction.Methods The parameters of the models were obtained through actual investigation,whereby Blender and 3DS MAX were used to model and import these parameters into a physics engine.By establishing an interface for the physics engine,gesture interaction hardware,and virtual reality(VR)helmet,a highly realistic chemical experiment environment was created.Using code script logic,particle systems,as well as other systems,chemical phenomena were simulated.Furthermore,we created an online teaching platform using streaming media and databases to address the problems of distance teaching.Results The proposed system was evaluated against two mainstream products in the market.In the experiments,the proposed system outperformed the other products in terms of fidelity and practicality.Conclusions The proposed system which offers realistic simulations and practicability,can help improve the high school chemistry experimental education.展开更多
Hydrocarbon regeneration of marine carbonate source rock was simulated with thermal experiments in a laboratory. The results reveal that hydrocarbon regeneration does not simply continue the primary hydrocarbon genera...Hydrocarbon regeneration of marine carbonate source rock was simulated with thermal experiments in a laboratory. The results reveal that hydrocarbon regeneration does not simply continue the primary hydrocarbon generation process, and that, for marine carbonate source rock, discontinuous hydrocarbon generation differs greatly from the continuous generation. Several different features of hydrocarbon regeneration were observed in the experiments. First, the liquid hydrocarbon generation peak was always observed no matter what the initial maturity of the sample was. Moreover, the maturity and the liquid hydrocarbon yield corresponding to the peak varied with the sample’s initial maturity. Second, the hydrocarbon regeneration started earlier than the continuous one. In the experiments, the hydrocarbon could be re-generated when the sample maturity did not rise to any great extent. Third, the accumulative hydrocarbon-generating quantity during discontinuous generation was always more than that during continuous generation. And the hydrocarbon-generating quantity varied with the discontinuous generation history. Chemical kinetic analysis suggests that discontinuous hydrocarbon generation should not only be explained by the parallel reaction mechanism but also by the consecutive reaction mechanism which has been ignored in the traditional chemical kinetic model for continuous hydrocarbon generation.展开更多
废塑料污染已经成为仅次于气候问题的第二大环境问题,废塑料的数量逐年递增。为了解决废塑料的环境污染问题,设计了废塑料化学升级制烯烃工艺的4条技术路线:废塑料气化经费-托合成制烯烃路线(PFTO),废塑料气化经一步法制烯烃路线(PZTO)...废塑料污染已经成为仅次于气候问题的第二大环境问题,废塑料的数量逐年递增。为了解决废塑料的环境污染问题,设计了废塑料化学升级制烯烃工艺的4条技术路线:废塑料气化经费-托合成制烯烃路线(PFTO),废塑料气化经一步法制烯烃路线(PZTO),废塑料气化经甲醇制烯烃路线(PMTO),废塑料裂解经加氢裂化制烯烃路线(PPTO)。为验证其可行性,对4条技术路线进行了化工流程模拟,采用技术经济性分析方法对比了4条技术路线的能源效率、经济性、CO_(2)排放量和碳原子利用效率等参数。模拟结果表明,PMTO路线的能源效率和CO_(2)排放量分别为55.60%和0.55 t CO_(2)/t烯烃,优于其他3条技术路线。在经济性能上,该路线具有产品成本低(4918.59 CNY/t)和内部收益率高(70.18%)的优势,总净现值是初始投资的5.98倍,且投资回报期为1.87年。因此,PMTO路线是一条可行的商业化技术路径。展开更多
基金supported by the National Natural Science Foundation of China(61403097)the Fundamental Research Funds for the Central Universities(HIT.NSRIF.2015035).
文摘Simulation is a powerful technique in evaluating and improving the performance of complex systems.In order to improve the efficiency of simulation experiment design,analysis and evaluation,auxiliary tools are required.Unfortunately,existing tools are usually not meeting the requirements of simulation.Moreover,the restricted interfaces,reusability and expandability influence their efficiency to a certain extent.In this paper,an integrated software environment,HIT-SEDAES,is designed for solving these problems.A process model of simulation experiment design,analysis and evaluation is introduced to guide the development of the software environment.And several solutions are proposed to solve key problems in this development.Finally,an application is used to illustrate how the software environment works for the problems of model validation,effectiveness evaluation and performance analysis.
基金National Innovation and Entrepreneurship Program for College Students(202218213001)Science and Technology Innovation Strategy of Guangdong Province(Science and Technology Innovation Cultivation of University Students 2020329182130C000002).
文摘Background Most existing chemical experiment teaching systems lack solid immersive experiences,making it difficult to engage students.To address these challenges,we propose a chemical simulation teaching system based on virtual reality and gesture interaction.Methods The parameters of the models were obtained through actual investigation,whereby Blender and 3DS MAX were used to model and import these parameters into a physics engine.By establishing an interface for the physics engine,gesture interaction hardware,and virtual reality(VR)helmet,a highly realistic chemical experiment environment was created.Using code script logic,particle systems,as well as other systems,chemical phenomena were simulated.Furthermore,we created an online teaching platform using streaming media and databases to address the problems of distance teaching.Results The proposed system was evaluated against two mainstream products in the market.In the experiments,the proposed system outperformed the other products in terms of fidelity and practicality.Conclusions The proposed system which offers realistic simulations and practicability,can help improve the high school chemistry experimental education.
基金Support by the research project of "Hydrocarbon Accumulation and the Petroleum Exploration Strategy Around the Manjiaer and Awat Depressions, Tarim Basin" (Grant No. XBKY0303)
文摘Hydrocarbon regeneration of marine carbonate source rock was simulated with thermal experiments in a laboratory. The results reveal that hydrocarbon regeneration does not simply continue the primary hydrocarbon generation process, and that, for marine carbonate source rock, discontinuous hydrocarbon generation differs greatly from the continuous generation. Several different features of hydrocarbon regeneration were observed in the experiments. First, the liquid hydrocarbon generation peak was always observed no matter what the initial maturity of the sample was. Moreover, the maturity and the liquid hydrocarbon yield corresponding to the peak varied with the sample’s initial maturity. Second, the hydrocarbon regeneration started earlier than the continuous one. In the experiments, the hydrocarbon could be re-generated when the sample maturity did not rise to any great extent. Third, the accumulative hydrocarbon-generating quantity during discontinuous generation was always more than that during continuous generation. And the hydrocarbon-generating quantity varied with the discontinuous generation history. Chemical kinetic analysis suggests that discontinuous hydrocarbon generation should not only be explained by the parallel reaction mechanism but also by the consecutive reaction mechanism which has been ignored in the traditional chemical kinetic model for continuous hydrocarbon generation.
文摘废塑料污染已经成为仅次于气候问题的第二大环境问题,废塑料的数量逐年递增。为了解决废塑料的环境污染问题,设计了废塑料化学升级制烯烃工艺的4条技术路线:废塑料气化经费-托合成制烯烃路线(PFTO),废塑料气化经一步法制烯烃路线(PZTO),废塑料气化经甲醇制烯烃路线(PMTO),废塑料裂解经加氢裂化制烯烃路线(PPTO)。为验证其可行性,对4条技术路线进行了化工流程模拟,采用技术经济性分析方法对比了4条技术路线的能源效率、经济性、CO_(2)排放量和碳原子利用效率等参数。模拟结果表明,PMTO路线的能源效率和CO_(2)排放量分别为55.60%和0.55 t CO_(2)/t烯烃,优于其他3条技术路线。在经济性能上,该路线具有产品成本低(4918.59 CNY/t)和内部收益率高(70.18%)的优势,总净现值是初始投资的5.98倍,且投资回报期为1.87年。因此,PMTO路线是一条可行的商业化技术路径。
