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外赋汤姆生效应及其应用
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作者 王华军 雷廷宙 《太阳能》 2003年第4期16-17,共2页
继发现塞贝克效应、帕尔贴效应之后,苏格兰物理学家汤姆生(后称开尔文爵士)于1854年又发现了汤姆生效应(Thomson Effect),即当电流通过存在温度梯度的导体时,导体会与周围环境发生热量交换,产生吸热或放热的物理现象.
关键词 赋汤姆生效 半导体热电发电 热电制冷技术 塞贝克系数梯度
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高绩效工作系统对企业绩效的影响模式研究 被引量:1
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作者 田立法 高素英 张金 《河北工业大学学报》 CAS 北大核心 2012年第1期113-118,共6页
基于战略人力资源管理理论并依据205家企业的调查数据,采用结构方程模型检验了高绩效工作系统对企业绩效的影响模式.结果显示,高绩效工作系统对企业绩效的影响为内生效应;而创新战略是决定高绩效工作系统与企业绩效关系的外生变量.
关键词 高绩效工作系统 企业绩效 创新战略 生效 外生效应
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Microstructure and superhardness effect of VC/TiC superlattice films 被引量:1
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作者 董学超 岳建岭 +2 位作者 王恩青 李淼磊 李戈扬 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2015年第8期2581-2586,共6页
Vanadium carbide/titanium carbide (VC/TiC) superlattice films were synthesized by magnetron sputtering method. The effects of modulation period on the microstructure evolution and mechanical properties were investig... Vanadium carbide/titanium carbide (VC/TiC) superlattice films were synthesized by magnetron sputtering method. The effects of modulation period on the microstructure evolution and mechanical properties were investigated by EDXA, XRD, HRTEM and nano-indentation. The results reveal that the VC/TiC superlattice films form an epitaxial structure when their modulation period is less than a critical value, accompanied with a remarkable increase in hardness. Further increasing the modulation period, the hardness of superlattices decreases slowly to the rule-of-mixture value due to the destruction of epitaxial structures. The XRD results reveal that three-directional strains are generated in superlattices when the epitaxial structure is formed, which may change the modulus of constituent layers. This may explain the remarkable hardness enhancement of VC/TiC superlattices. 展开更多
关键词 superlattice films carbide films microstructure evolution superhardness effect epitaxial growth
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rmhTNF-α Combined with Cisplatin Inhibits Proliferation of A549 Cell Line In Vitro 被引量:2
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作者 Le-min Xia Yi-yang Zhou 《Chinese Medical Sciences Journal》 CAS CSCD 2014年第3期185-187,共3页
Objective To explore the inhibitory effect of recombinant mutant human tumor necrosis factor-α(rmhTNF-α) in combination with cisplatin on human lung adenocarcinoma cell line A549. Methods Human lung adenocarcinoma c... Objective To explore the inhibitory effect of recombinant mutant human tumor necrosis factor-α(rmhTNF-α) in combination with cisplatin on human lung adenocarcinoma cell line A549. Methods Human lung adenocarcinoma cell line A549 was treated with varying concentrations of rmhTNF-α(0.38, 0.75, 1.50, 6.00 and 12.00 IU/ml) or cisplatin(3.91, 7.81, 15.63, 31.25 and 62.50 μg/ml) for 24 hours. Viable cell number was analyzed by using crystal violet staining. The inhibitory rates of A549 cells growth by the two drugs were calculated. For analyzing whether there was a synergistic effect of rmhTNF-α with cisplatin, A549 cells were treated with 0.75 IU/ml rmhTNF-α and increased concentrations of cisplatin. Results rmhTNF-α or cisplatin inhibited the growth of A549 cell lines in a dose-dependent manner. The inhibitory effect of rmhTNF-α combined with cisplatin was significantly greater than cisplatin alone at the same concentration(all P<0.01). Conclusion rmhTNF-α combined with cisplatin might have synergistic inhibitory effect on human lung adenocarcinoma cell line A549. 展开更多
关键词 recombinant mutant human tumor necrosis factor-α CISPLATIN A549 cell line
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FDI's Spillover Effects on China's Growth Quality
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作者 沈坤荣 傅元海 《China Economist》 2011年第1期12-20,共9页
Using panel data of 29 regions in China from 1999 to 2007, this paper presents a systematic evaluation of how FDI's spillover effects impact the quality of China's indigenous econotnic growth, Research outcomes sugg... Using panel data of 29 regions in China from 1999 to 2007, this paper presents a systematic evaluation of how FDI's spillover effects impact the quality of China's indigenous econotnic growth, Research outcomes suggest that technology transfers and diffusion have a positive effect on indigenous growth quality. Spitlover effects (mainly competition effect) have primarily negatively affected indigenous growth quality. The effect on indigenous growth quality is positive only in sub-samples with high foreign capital concentration and ,,hen the spillover effect is similar to the technology transfer and diffusion effect brought about by localization. It is also found that technology gaps, foreign capital concentration and value added ratio gaps are important factors affecting the impact of technology transfer and diffusion on indigenous economic growth. 展开更多
关键词 technology transfer and diffusion spillover effect economic growth quality
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邻里效应及其对农地流转选择行为的影响机制研究--基于贵州省540户农户的调查 被引量:25
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作者 洪名勇 何玉凤 《农业技术经济》 CSSCI 北大核心 2020年第9期4-19,共16页
本文选取贵州省农户为调查对象,以3县3村为调查样本,以50米以内、100米以内以及小组内成员定义邻里,运用线性均值模型、logit模型等工具分析邻里效应对农地流转的影响,并将邻里效应的作用机制区分为内生效应与外生效应。研究表明:(1)农... 本文选取贵州省农户为调查对象,以3县3村为调查样本,以50米以内、100米以内以及小组内成员定义邻里,运用线性均值模型、logit模型等工具分析邻里效应对农地流转的影响,并将邻里效应的作用机制区分为内生效应与外生效应。研究表明:(1)农地流转存在邻里效应,邻里效应显著影响了农地流转行为、农地流转契约选择、价格选择及方式选择等。(2)邻里距离越近对农户的选择行为影响越大。对于邻里效应的忽视,导致以往研究存在内生性偏差。(3)将邻里效应的作用机制区分为内生效应与外生效应;其内生效应,即邻里的农地流转行为显著影响农户选择同样的行为;外生效应,即邻里的户主特征、社会经济地位、土地数量、土地质量、劳动力状况等均对农户的选择行为产生影响。基于此,本文认为充分发挥资深成员、党员、村干部、新型职业农民等的带头作用,积极开展土地整治相关项目,发挥小组的示范作用,调整优化农业产业结构等为政策启示所在。 展开更多
关键词 农地流转 邻里效 生效 外生效应 影响机制
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竞争性战略联盟网络外部性研究
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作者 周焯华 秦佳良 龙勇 《价格理论与实践》 CSSCI 北大核心 2014年第5期26-28,共3页
网络外部性特征对产业的竞争行为、定价策略等有着重要影响。本文分析了网络外部性对竞争性联盟成员利润的影响以及联盟外企业网络外部性对联盟成员利润的影响。研究结果表明,产品网络的外部性能驱动联盟的利润动机;竞争性战略联盟的利... 网络外部性特征对产业的竞争行为、定价策略等有着重要影响。本文分析了网络外部性对竞争性联盟成员利润的影响以及联盟外企业网络外部性对联盟成员利润的影响。研究结果表明,产品网络的外部性能驱动联盟的利润动机;竞争性战略联盟的利润与联盟的网络外部性强度是正相关关系,与联盟外企业的网络外部性强度是负相关关系。根据研究结果,本文最后提出了相关建议。 展开更多
关键词 网络部性 竞争性战略联盟 利润 外生效应
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Phase-field modeling of epitaxial growth with the Ehrlich-Schwoebel barrier: Model validation and application
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作者 DONG Xiang Lei XING Hui +4 位作者 SHA Sha CHEN Chang Le NIU Li Wei WANG Jian Yuan JIN Ke Xin 《Science China(Technological Sciences)》 SCIE EI CAS CSCD 2015年第4期753-762,共10页
In this paper,we introduce different forms of mobility into a quantitative phase-field model to produce arbitrary Ehrlich-Schwoebel(ES)effects.Convergence studies were carried out in the one-side step-flow model,which... In this paper,we introduce different forms of mobility into a quantitative phase-field model to produce arbitrary Ehrlich-Schwoebel(ES)effects.Convergence studies were carried out in the one-side step-flow model,which showed that the original mobility not only induces the ES effect,but also leads to larger numerical instability with increase of the step width.Thus,another modified form of the ES barrier is proposed,and is found to be more suitable for large-scale simulations.Model applications were performed on the wedding-cake structure,coarsening and coalescence of islands and spiral growth.The results show that the ES barrier exhibits more significant kinetic effects at the larger deposition rates by limiting motions of atoms on upper steps,leading to aggregation on the top layers,as well as the roughening of growing surfaces. 展开更多
关键词 epitaxial growth phase-field method Ehrlich-Schwoebel barrier KINETICS INTERFACIAL
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