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.
- 關鍵字:粒子靜止質量 希格斯場 自由粒子 量子質量 激發波長
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.
- 關鍵字:粒子靜止質量 希格斯場 自由粒子 量子質量 激發波長
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.
- 關鍵字:密度泛函理論 靜態關聯效應系統 熱化學 動力學
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.
- 關鍵字:密度泛函理論 靜態關聯效應系統 熱化學 動力學
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.
- 關鍵字:豆腐製作溫度 豆漿電導率 奧姆加熱 升溫速率
0:21:32
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How to Teach Happiness to Marketing Students（2）
- 2014年中國市場營銷國際學術年會——快樂營銷是近年來常被人提及的一種營銷手段，特別是在全球遭遇經濟危機，快樂營銷在此陰霾的襯托之下愈加顯得耀眼。追尋快樂是人的本性，快樂營銷正是藉助人的這種本性所衍生出的新的營銷模式。在這種趨勢下，加拿大畢索大學開設了快樂營銷課程，致力於培養快樂營銷人才。
- 關鍵字:市場營銷 快樂營銷 消費選擇 客戶項目
0:12:13
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Managing Customer Profits-the Power of Habits（1）
- 2014年中國市場營銷國際學術年會——除了重複購買，人們還有沒有其他重複性行爲？如果有，那些行爲是什麼？他們是如何形成的？以及市場營銷人員爲什麼要關注這些行爲？基於國家零銷商的數據庫，作者們將習慣理論運用於顧客行爲，發現了消費者的重複性行爲以及營銷對消費者消費行爲和企業的影響等內容。這些發現強調經理們需要跳出重複性購買來考慮消費者習慣；實施政策調整前要考慮顧客習慣的測量，幷且利用這些習慣測量，在顧客層面上戰略性分配資源，使得客戶與企業利益均達到最大化。
- 關鍵字:重複購買 市場營銷 習慣理論 消費習慣
0:16:30
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Managing Customer Profits-the Power of Habits（2）
- 2014年中國市場營銷國際學術年會——除了重複購買，人們還有沒有其他重複性行爲？如果有，那些行爲是什麼？他們是如何形成的？以及市場營銷人員爲什麼要關注這些行爲？基於國家零銷商的數據庫，作者們將習慣理論運用於顧客行爲，發現了消費者的重複性行爲以及營銷對消費者消費行爲和企業的影響等內容。這些發現強調經理們需要跳出重複性購買來考慮消費者習慣；實施政策調整前要考慮顧客習慣的測量，幷且利用這些習慣測量，在顧客層面上戰略性分配資源，使得客戶與企業利益均達到最大化。
- 關鍵字:重複購買 市場營銷 習慣理論 消費習慣
0:11:14
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Special Session-Meeting With Editors of Journal of Marketing（1）
- 2014年中國市場營銷國際學術年會——特別專題：Journal of Marketing兩任主編與學者面對面。Prof. V.Kumar是美國佐治亞州立大學教授，華中科技大學長江學者，現任《Journal of Marketing》主編。在特別專題環節，Prof. V.Kumar從編輯角度、雜誌內容、審查程序和驗收標準等方面，向大家介紹了《Journal of Marketing》雜誌。
- 關鍵字:市場營銷雜誌 收錄內容 審查程序 驗收標準
0:15:36
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Special Session-Meeting With Editors of Journal of Marketing（2）
- 2015年中國市場營銷國際學術年會——特別專題：Journal of Marketing兩任主編與學者面對面。Prof. V.Kumar是美國佐治亞州立大學教授，華中科技大學長江學者，現任《Journal of Marketing》主編。在特別專題環節，Prof. V.Kumar從編輯角度、雜誌內容、審查程序和驗收標準等方面，向大家介紹了《Journal of Marketing》雜誌。
- 關鍵字:市場營銷雜誌 收錄內容 審查程序 驗收標準