For physical ozone absorption without reaction,two parametric estimation methods,i.e.the common linear least square fitting and non-linear Simplex search methods,were applied,respectively,to determine the ozone mass t...For physical ozone absorption without reaction,two parametric estimation methods,i.e.the common linear least square fitting and non-linear Simplex search methods,were applied,respectively,to determine the ozone mass transfer coefficient during absorption and both methods give almost the same mass transfer coefficient.While for chemical absorption with ozone decomposition reaction,the common linear least square fitting method is not applicable for the evaluation of ozone mass transfer coefficient due to the difficulty of model linearization for describing ozone concentration dissolved in water.The nonlinear Simplex method obtains the mass transfer coefficient by minimizing the sum of the differences between the simulated and experimental ozone concentration during the whole absorption process,without the limitation of linear relationship between the dissolved ozone concentration and absorption time during the initial stage of absorption.Comparison of the ozone concentration profiles between the simulation and experimental data demonstrates that Simplex method may determine ozone mass transfer coefficient during absorption in an accurate and high efficiency way with wide applicability.展开更多
This paper briefly presents some typical problems in EFL teaching in China at first. Then, some practical methods in EFL teaching are suggested. It indicates that an English teacher should not only teach the students ...This paper briefly presents some typical problems in EFL teaching in China at first. Then, some practical methods in EFL teaching are suggested. It indicates that an English teacher should not only teach the students linguistic knowledge but also cultivate their competence to use the language.展开更多
The searching method of spatial information on traditional geo-archives catalog database(TGCD) is based on the text,and the result of retrieval can be only from the text of fields of relational database.The informatio...The searching method of spatial information on traditional geo-archives catalog database(TGCD) is based on the text,and the result of retrieval can be only from the text of fields of relational database.The information queried must be input into the relational database as a text form in advance,otherwise,the visitors would not get any result from it.So。展开更多
In this paper the Hamming distance is used to contr ol individual difference in the process of creating an original population, and a peak-depot is established to preserve information of different peak-points. So me n...In this paper the Hamming distance is used to contr ol individual difference in the process of creating an original population, and a peak-depot is established to preserve information of different peak-points. So me new methods are also put forward to improve optimization performance of genet ic algorithm, such as point-cast method and neighborhood search strategy around peak-points. The methods are used to deal with genetic operation besides of cr ossover and mutation, in order to obtain a global optimum solution and avoid GA ’s premature convergence. By means of many control rules and a peak-depot, the new algorithm carries out optimum search surrounding several peak-points. Alon g with evolution of individuals of population, the fitness of peak-points of pe ak-depot increases continually, and a global optimum solution can be obtained. The new algorithm searches around several peak-points, which increases the prob ability to obtain the global optimum solution to the best. By using some example s to test the modified genetic algorithm, the results indicate what we have done makes the modified genetic algorithm effectively to solve both of linear optimi zation problems and nonlinear optimization problems with restrictive functions.展开更多
实践教学作为创新人才培养的关键环节起着至关重要的作用,将创新方法融入实践教学成为深化新工科建设的有效途径。文中以TRIZ(theory of inventive problem solving)作为创新方法的主要内容,融入了机器人工程专业实践教学的全流程,在教...实践教学作为创新人才培养的关键环节起着至关重要的作用,将创新方法融入实践教学成为深化新工科建设的有效途径。文中以TRIZ(theory of inventive problem solving)作为创新方法的主要内容,融入了机器人工程专业实践教学的全流程,在教学初始阶段通过开设创新方法基础课“创新思维与TRIZ”讲授其基本理论及工具。在专业知识学习阶段以“专业综合实训”课程作为专创融合案例,详细介绍了将TRIZ融入实训的步骤,引导学生使用相关工具对问题进行分析及求解,并对方案进行评估。同时针对课程评价标准中的创新指标进行细化分析,对学生创新能力的培养形成了有效判断,肯定了将创新方法融入实践教学对于提高学生创新能力的有效性。展开更多
基金Project(2011467001)supported by the Ministry of Environment Protection of ChinaProject(2010DFB94130)supported by the Ministry of Science and Technology of China
文摘For physical ozone absorption without reaction,two parametric estimation methods,i.e.the common linear least square fitting and non-linear Simplex search methods,were applied,respectively,to determine the ozone mass transfer coefficient during absorption and both methods give almost the same mass transfer coefficient.While for chemical absorption with ozone decomposition reaction,the common linear least square fitting method is not applicable for the evaluation of ozone mass transfer coefficient due to the difficulty of model linearization for describing ozone concentration dissolved in water.The nonlinear Simplex method obtains the mass transfer coefficient by minimizing the sum of the differences between the simulated and experimental ozone concentration during the whole absorption process,without the limitation of linear relationship between the dissolved ozone concentration and absorption time during the initial stage of absorption.Comparison of the ozone concentration profiles between the simulation and experimental data demonstrates that Simplex method may determine ozone mass transfer coefficient during absorption in an accurate and high efficiency way with wide applicability.
文摘This paper briefly presents some typical problems in EFL teaching in China at first. Then, some practical methods in EFL teaching are suggested. It indicates that an English teacher should not only teach the students linguistic knowledge but also cultivate their competence to use the language.
文摘The searching method of spatial information on traditional geo-archives catalog database(TGCD) is based on the text,and the result of retrieval can be only from the text of fields of relational database.The information queried must be input into the relational database as a text form in advance,otherwise,the visitors would not get any result from it.So。
文摘In this paper the Hamming distance is used to contr ol individual difference in the process of creating an original population, and a peak-depot is established to preserve information of different peak-points. So me new methods are also put forward to improve optimization performance of genet ic algorithm, such as point-cast method and neighborhood search strategy around peak-points. The methods are used to deal with genetic operation besides of cr ossover and mutation, in order to obtain a global optimum solution and avoid GA ’s premature convergence. By means of many control rules and a peak-depot, the new algorithm carries out optimum search surrounding several peak-points. Alon g with evolution of individuals of population, the fitness of peak-points of pe ak-depot increases continually, and a global optimum solution can be obtained. The new algorithm searches around several peak-points, which increases the prob ability to obtain the global optimum solution to the best. By using some example s to test the modified genetic algorithm, the results indicate what we have done makes the modified genetic algorithm effectively to solve both of linear optimi zation problems and nonlinear optimization problems with restrictive functions.
文摘实践教学作为创新人才培养的关键环节起着至关重要的作用,将创新方法融入实践教学成为深化新工科建设的有效途径。文中以TRIZ(theory of inventive problem solving)作为创新方法的主要内容,融入了机器人工程专业实践教学的全流程,在教学初始阶段通过开设创新方法基础课“创新思维与TRIZ”讲授其基本理论及工具。在专业知识学习阶段以“专业综合实训”课程作为专创融合案例,详细介绍了将TRIZ融入实训的步骤,引导学生使用相关工具对问题进行分析及求解,并对方案进行评估。同时针对课程评价标准中的创新指标进行细化分析,对学生创新能力的培养形成了有效判断,肯定了将创新方法融入实践教学对于提高学生创新能力的有效性。
