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Search Results: 1 - 10 of 11319 matches for " Jianwang Cai "
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The spin and orbital moment contributions of each element to macroscopic magnetization in Co0.9Fe0.1 films
Yuxian Guo,Jie Wang,Honghong Li,Pengshou Xu,Jianwang Cai
Chinese Science Bulletin , 2006, DOI: 10.1007/s11434-006-2082-4
Abstract: Co-Fe alloy films have such properties as high saturation magnetization, high Curie temperature and low coercive force. It is of importance to study the origin of high saturation magnetization in these alloys. In this paper, we study the spin (m s) and orbital moments (m o) of Fe and Co in the Co0.9Fe0.1 film by using X-ray magnetic circular dichroism (XMCD) and SQUID magnetometry. The m s and m o for Co are 1.58 and 0.31 μB, and for Fe are 1.63 and 0.36 μB respectively. The average magnetic moment (1.90 μB) determined by XMCD is in agreement with that obtained from SQUID measurements. The total magnetic moment ratio of Fe to Co is 10.5:89.5, while the ratio of the spin to orbital moment is 83.4:16.6. Considering the separation of the spin and orbital moment, an outcome of m Fe-spin: m Fe-orbit: m Co-spin: m Co-orbit = 8.6:1.9:74.8:14.7 is obtained.
Tight-binding molecular-dynamics study of melting behaviour of small silicon clusters
硅团簇熔化行为的紧束缚分子动力学研究

Wang JianWang,Shao-Qing,
王坚
,王绍青

物理学报 , 2003,
Abstract: 利用紧束缚分子动力学方法研究了硅团簇Sin(n=5—10)的熔化行为.给出了团簇 熔化潜热 和熔点随团簇尺寸的变化关系,表明团簇熔化潜热和熔点强烈依赖于团簇的原子数.计算结 果表明硅团簇熔化机理与金属团簇熔化有很大不同,金属小团簇的熔化是一个从低温类固态 向高温类固态转变的过程,在转变温区,类固态和类液态处于动力学共存,而硅团簇在转变 温区则是处于一种中间态,这种中间态既不是类固态又不是类液态.比较了用不同计算方法 和定义方法所得硅团簇熔点.
Simulation Investigation of Backward Wave Oscillation of Millimeter-wave TWT
毫米波行波管返波振荡的仿真研究

Lu De-jianWang Zi-chengLiu Pu-kun,
陆德坚
,王自成,刘濮鲲

电子与信息学报 , 2008,
Abstract: HFSS is used to simulate helical, contrawound helix and coupled-cavity Slow-Wave Structures(SWS), which work in Ka-band, to investigate the backward-wave oscillation of millimeter-wave TWT. The results show that, space harmonics, which axial space harmonic number and azimuth space harmonic number are unequal, are evident in helical SWS, the SWS runs a risk of backward oscillation near the mode. Relatively, contrawound helix shows excellent ability in restraining backward oscillation by improving interaction impedance and the normalized frequency which can work without backward oscillation. And coupled-cavity should avoid working around those frequencies where phase shifts per cavity are or .
Curriculum Design, Linguistic Competence and Self-Actualization: A Case Study on English Curriculum Design for Chinese Non-English Major Postgraduates  [PDF]
Shangzhi Cai
Creative Education (CE) , 2010, DOI: 10.4236/ce.2010.13028
Abstract: Studies conducted hitherto on English education for Chinese non-English major postgraduates have preponderantly focused on themes such as learning motivations, teaching or learning strategies, and various examinations. Yet little attention has been paid to the issue of curriculum design. In order to explore the correlations amongst curriculum design, linguistic competence and self-actualization, the author has carried out a survey on the English curriculum design for non-English major postgraduates in Yunnan Normal University by applying Maslow’s theory of self-actualization. The survey reveals that postgraduates’ reading abilities hold low correlation with self-actualization, thus priority should be given to improve their speaking proficiency as well as listening abilities. Besides, as a basic requirement for all postgraduates, academic writing receives the most attention since the quality of their graduate dissertation is considered as the ultimate indication of their self-actualization. Apart from providing concerning suggestions on the curriculum design according to the above findings, the author also holds that curriculum design is an autonomous, flexible and dynamic process. Hence, instead of sticking to the long-adopted uniform English curriculum for all non-English major postgraduates in China, more flexible curricula and requirements should be introduced in order to fulfill the self–actualization of postgraduates from different universities, different majors, and different regions.
The Existence and Multiplicity of Solutions for Singular Boundary Value Systems with p-Laplacian  [PDF]
Zengxia Cai
Journal of Applied Mathematics and Physics (JAMP) , 2015, DOI: 10.4236/jamp.2015.34052
Abstract:

This paper presents sufficient conditions for the existence of positive solutions for the fourth-order boundary value problem system with p-Laplacian operator. The existence of single or multiple positive solutions for the system is showed through the fixed point index theory in cones under some assumptions.

On the Relation of Grain Orientation and Opening Crack of an Al-Cu-Mg Sheet  [PDF]
Cai Hu
Engineering (ENG) , 2017, DOI: 10.4236/eng.2017.95031
Abstract: In this paper, the orientation of grains which adjacent to a developed opening crack was investigated by EBSD. A definition of θ has been came up with which represents the angle between the principal stress plane and each plane of the grains. Smaller θ means easier to crack. It gave a good explanation of the crack propagation throughout the grains. It also revealed that propagation path is along with the plane. This finding will give a prediction of tear properties and help us understanding the cracking mechanism and the behavior of tearing.
Traditional Chinese Herbal Medicine for Epilepsy Treatment Should Be Administered According to the Seizure Type and Epileptic Syndrome  [PDF]
Lun Cai
Health (Health) , 2017, DOI: 10.4236/health.2017.98087
Abstract: Traditional Chinese herbal medicine (TCHM) has long been used to treat epilepsy. Although many clinical trials and animal studies have seemingly demonstrated its effect, the question of whether TCHM is efficacious in epileptic patients has not been certified because of insufficient supportive evidence. This insufficient supportive evidence stems from the fact that most of the current studies regarding TCHM for epilepsy treatment are not designed according to the different seizure types and epileptic syndromes (STESs). Here, we explore the reasons why many studies have not considered the various STESs and explain how to treat epilepsy according to the pharmacological mechanism for different STESs and exploit the advantage of TCHM for epilepsy treatment. Then, we explain how we treat epilepsy using TCHM according to the different STESs and Bian Zheng Lun Zi.
Research on Internet Consumer Financial Products Usage Intention—Taking College Students as an Example  [PDF]
Yexin Cai
Journal of Financial Risk Management (JFRM) , 2017, DOI: 10.4236/jfrm.2017.64027
Abstract: With the rise of Internet consumer finance, it has greatly promoted the prosperity of the stage consumption market, and the college students group is a market with great development space and untapped market. In this research background, this article combines the technology acceptance model and the rational acceptance model, and introduces consumer innovation and perceived risk to explore the influence of consumers on the willingness of e-commerce Internet consumer financial products. The study found that perceived usefulness and willingness to use had a significant positive correlation, and that perceived risk and willingness to use had a significant negative correlation. Perceived ease of use and subjective norms have a significant positive effect on perceived usefulness; Consumer innovation and perceived ease of use have significant positive impact, and consumers’ innovation and perceived risk have significant negative impact. The conclusions of this study enrich the study of willingness to use, and put forward relevant marketing strategies for enterprises to promote and occupy market share.
Effects of Short-Term International Capital Flows on China’s Real Estate Prices  [PDF]
Xiaoxiong Cai
Modern Economy (ME) , 2018, DOI: 10.4236/me.2018.91002
Abstract: Nowadays, the real estate prices in China have shown a continuous upward trend. Prices in the first-tier cities such as the north and the Guangzhou-Shenzhen are getting higher and higher, and ordinary people are becoming increasingly unaffordable. High housing prices have not only put pressure on people’s lives but also have had many adverse effects on China’s economic development. Many scholars at home and abroad think that the continuous rise of house prices is closely related to the flow of international short-term capital. International short-term capital when entering the Chinese market, because of its speculative easy to create a bubble, bringing huge risks. Through theoretical and empirical research, this paper analyzes whether the international short-term capital flows have an impact on house prices. Finally, it concludes that the inflow of international short-term funds to the real estate market in China has a positive impact on the real estate market in China, and to a certain extent, has promoted the real estate prices. The entry and exit of hot money have a great volatility effect on the real estate market, which has a great impact on the long-term, healthy and stable development of China’s real estate market.
The Evolution of Distribution of Technology Transfer in China: Evidence from Patent Licensing  [PDF]
Yuqing Cai
American Journal of Industrial and Business Management (AJIBM) , 2018, DOI: 10.4236/ajibm.2018.85084
Abstract: This study explores the temporal and spatial distribution of technology transfer in China by analyzing the licensing activities from the perspective of supplier and demander of the technology transfer chain, using the data obtained from the State Intellectual Property Office of China (SIPO). We find that the overall number of licensed technologies has increased dramatically during 10 years and different types of technology show diverse trends. And the technology age is declining year by year, among which the age of invention patents is the oldest. As licensors, individuals and firms provide the vast majority of outward technologies and most of their technologies are utility models. However, only firms take the vast majority as licensee. And most inward technologies come from foreign organizations before 2008, while domestic sources provide the majority of inward technologies after 2008. We also provide suggestions for policy-makers and firms.
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