0:17:04
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A classical approach to the modeling of quantum mass（2）
- 2014 Spring World Congress on Engineering and Technology (SCET 2014)——This work focused on one question: Where does the rest mass of a particle come from? In modern physics, a particle is regarded as the quantum excitation of a field. Then, how can a particle have a rest mass? According to the Standard Model, a particle acquires mass through its interaction with a hypothetical Higgs field. The rest mass is essentially identified from the Klein- Gordon equation of a free particle (through its associated Lagrangian density). It was reported recently that a key feature of this theory (i.e., prediction of Higgs boson) is supported by experiments conducted at LHC. Nevertheless, there are still many questions about the Higgs model. Particularly, the physical meaning of the rest mass m based on the Higgs mechanism would be intrinsically different from energy E or momentum p. This does not seem to be very satisfactory. In this paper, we would like to explore a different approach based on more classical concepts. We think mass should be treated on the same footing as momentum and energy, and the definition of mass should be strictly based on its association with the momentum. By postulating that all particles in nature (including fermions and bosons) are excitation waves of the vacuum medium, we propose a simple wave equation for a free particle. We find that the rest mass of the particle is associated with a “transverse wave number”, and the Klein-Gordon equation can be derived from the general wave equation if one considers only the longitudinal component of the excitation wave. Implications of this model and its comparison with the Higgs model are discussed in this work.
- Keyword:粒子静止质量 希格斯场 自由粒子 量子质量 激发波长
0:14:53
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A classical approach to the modeling of quantum mass（3）
- 2014 Spring World Congress on Engineering and Technology (SCET 2014)——This work focused on one question: Where does the rest mass of a particle come from? In modern physics, a particle is regarded as the quantum excitation of a field. Then, how can a particle have a rest mass? According to the Standard Model, a particle acquires mass through its interaction with a hypothetical Higgs field. The rest mass is essentially identified from the Klein- Gordon equation of a free particle (through its associated Lagrangian density). It was reported recently that a key feature of this theory (i.e., prediction of Higgs boson) is supported by experiments conducted at LHC. Nevertheless, there are still many questions about the Higgs model. Particularly, the physical meaning of the rest mass m based on the Higgs mechanism would be intrinsically different from energy E or momentum p. This does not seem to be very satisfactory. In this paper, we would like to explore a different approach based on more classical concepts. We think mass should be treated on the same footing as momentum and energy, and the definition of mass should be strictly based on its association with the momentum. By postulating that all particles in nature (including fermions and bosons) are excitation waves of the vacuum medium, we propose a simple wave equation for a free particle. We find that the rest mass of the particle is associated with a “transverse wave number”, and the Klein-Gordon equation can be derived from the general wave equation if one considers only the longitudinal component of the excitation wave. Implications of this model and its comparison with the Higgs model are discussed in this work.
- Keyword:粒子静止质量 希格斯场 自由粒子 量子质量 激发波长
0:15:23
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Thermally-Assisted-Occupation Density Functional Theory（1）
- 2014 Spring World Congress on Engineering and Technology (SCET 2014)——In this talk, I will briefly describe the formulation of our recently proposed thermally-assisted-occupation density func-tional theory (TAO-DFT) [J.-D. Chai, J. Chem. Phys. 136, 154104 (2012)] and the density functional approximations to TAO-DFT [J.-D. Chai, J. Chem. Phys. 140, 18A521 (2014)]. In contrast to Kohn-Sham DFT, TAO-DFT is a DFT with fractional orbital occupations given by the Fermi-Dirac distribution (controlled by a fictitious temperature), for the study of large ground-state systems with strong static correlation effects. Relative to TAO-LDA (i.e., the local density approximation to TAO-DFT), TAO-GGAs (i.e., the generalized-gradient approximations to TAO-DFT) are significantly superior for a wide range of applications, such as thermochemistry, kinetics, and reaction energies. For noncovalent interactions, TAO-GGAs with empirical dispersion corrections are shown to yield excellent performance. Due to their computational efficiency for systems with strong static correlation effects, TAO-LDA and TAO-GGAs are applied to study the elec-tronic properties of acenes with different number of linearly fused benzene rings (up to 100), which is very challenging for conventional electronic structure methods. Some interesting results will be presented in this talk.
- Keyword:密度泛函理论 静态关联效应系统 热化学 动力学
0:18:34
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Thermally-Assisted-Occupation Density Functional Theory（2）
- 2014 Spring World Congress on Engineering and Technology (SCET 2014)——In this talk, I will briefly describe the formulation of our recently proposed thermally-assisted-occupation density func-tional theory (TAO-DFT) [J.-D. Chai, J. Chem. Phys. 136, 154104 (2012)] and the density functional approximations to TAO-DFT [J.-D. Chai, J. Chem. Phys. 140, 18A521 (2014)]. In contrast to Kohn-Sham DFT, TAO-DFT is a DFT with fractional orbital occupations given by the Fermi-Dirac distribution (controlled by a fictitious temperature), for the study of large ground-state systems with strong static correlation effects. Relative to TAO-LDA (i.e., the local density approximation to TAO-DFT), TAO-GGAs (i.e., the generalized-gradient approximations to TAO-DFT) are significantly superior for a wide range of applications, such as thermochemistry, kinetics, and reaction energies. For noncovalent interactions, TAO-GGAs with empirical dispersion corrections are shown to yield excellent performance. Due to their computational efficiency for systems with strong static correlation effects, TAO-LDA and TAO-GGAs are applied to study the elec-tronic properties of acenes with different number of linearly fused benzene rings (up to 100), which is very challenging for conventional electronic structure methods. Some interesting results will be presented in this talk.
- Keyword:密度泛函理论 静态关联效应系统 热化学 动力学
0:14:05
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Ohmic heating for tofu making - a pilot study
- 2014 Spring World Congress on Engineering and Technology (SCET 2014)——The aim of this study is to explore the relationship between temperature and electrical conductivity of soya milk under ohmic heating in tofu making. The soya milk of 10°Brix was heated to a steady temperature of 90°C. The applied voltage was increased and the temperature rising rate was investigated for adequate heating profiles in tofu making. Experimental results showed that the electrical conductivity of soya milk is proportional to the heating time. The temperature rising rate was increased from 1.46 to 3.82 °C/min as a result of increased voltage. Hence ohmic heating could be an efficient, convenient heating measure in tofu making.
- Keyword:豆腐制作温度 豆浆电导率 奥姆加热 升温速率
0:21:32
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How to Teach Happiness to Marketing Students（2）
- 2014年中国市场营销国际学术年会——快乐营销是近年来常被人提及的一种营销手段，特别是在全球遭遇经济危机，快乐营销在此阴霾的衬托之下愈加显得耀眼。追寻快乐是人的本性，快乐营销正是借助人的这种本性所衍生出的新的营销模式。在这种趋势下，加拿大毕索大学开设了快乐营销课程，致力于培养快乐营销人才。
- Keyword:市场营销 快乐营销 消费选择 客户项目
0:12:13
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Managing Customer Profits-the Power of Habits（1）
- 2014年中国市场营销国际学术年会——除了重复购买，人们还有没有其他重复性行为？如果有，那些行为是什么？他们是如何形成的？以及市场营销人员为什么要关注这些行为？基于国家零销商的数据库，作者们将习惯理论运用于顾客行为，发现了消费者的重复性行为以及营销对消费者消费行为和企业的影响等内容。这些发现强调经理们需要跳出重复性购买来考虑消费者习惯；实施政策调整前要考虑顾客习惯的测量，幷且利用这些习惯测量，在顾客层面上战略性分配资源，使得客户与企业利益均达到最大化。
- Keyword:重复购买 市场营销 习惯理论 消费习惯
0:16:30
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Managing Customer Profits-the Power of Habits（2）
- 2014年中国市场营销国际学术年会——除了重复购买，人们还有没有其他重复性行为？如果有，那些行为是什么？他们是如何形成的？以及市场营销人员为什么要关注这些行为？基于国家零销商的数据库，作者们将习惯理论运用于顾客行为，发现了消费者的重复性行为以及营销对消费者消费行为和企业的影响等内容。这些发现强调经理们需要跳出重复性购买来考虑消费者习惯；实施政策调整前要考虑顾客习惯的测量，幷且利用这些习惯测量，在顾客层面上战略性分配资源，使得客户与企业利益均达到最大化。
- Keyword:重复购买 市场营销 习惯理论 消费习惯
0:11:14
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Special Session-Meeting With Editors of Journal of Marketing（1）
- 2014年中国市场营销国际学术年会——特别专题：Journal of Marketing两任主编与学者面对面。Prof. V.Kumar是美国佐治亚州立大学教授，华中科技大学长江学者，现任《Journal of Marketing》主编。在特别专题环节，Prof. V.Kumar从编辑角度、杂志内容、审查程序和验收标准等方面，向大家介绍了《Journal of Marketing》杂志。
- Keyword:市场营销杂志 收录内容 审查程序 验收标准
0:15:36
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Special Session-Meeting With Editors of Journal of Marketing（2）
- 2015年中国市场营销国际学术年会——特别专题：Journal of Marketing两任主编与学者面对面。Prof. V.Kumar是美国佐治亚州立大学教授，华中科技大学长江学者，现任《Journal of Marketing》主编。在特别专题环节，Prof. V.Kumar从编辑角度、杂志内容、审查程序和验收标准等方面，向大家介绍了《Journal of Marketing》杂志。
- Keyword:市场营销杂志 收录内容 审查程序 验收标准