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71.
鲁云生 《佳木斯教育学院学报》2014,(1):33-33
师德建设是教师队伍建设的关键。高等院校党组织应该把师德建设放在师资队伍建设的首位,千方百计地提高师德建设水平。加强高等职业院校教师师德建设是一个事关我国高等教育实现跨世纪发展的重要课题。 相似文献
72.
移动互联网迅猛发展彻底颠覆了传统通讯产业竞争格局。老牌通讯产业巨头如今面临手机销量急剧下跌、公司市值快速萎缩、破产倒闭等困境,新兴的互联网与软件公司开始引领产业发展与竞争新方向。智能手机操作系统平台已经成为移动通讯产业崭新的竞争制高点,推动企业之间竞争由"单个企业之争"演变成为"操作系统平台联盟之争"。通过实施开放源代码竞争战略、技术专利化与标准化竞争战略、移动互联网在线应用服务竞争战略,可以有效解决平台各边用户"鸡蛋相生"与交叉网络外部性"内部化"难题。 相似文献
73.
本文分析了网络技术环境与网络社会环境的内涵及其对VEO生产与发展的影响；讨论了VEO对信息技术的依存关系；重点研究了VEO商业智能系统的构建模型、要素框架、实现工具以及开发技术等。 相似文献
74.
围绕软件企业R＆D活动中“控制权与剩余索取权的优化配置”这一中心问题,探讨软件企业R＆D治理问题产生的原因,从员工持股、员工培训、决策参与、技术等级晋升等四个角度展开对R＆D治理的理论分析与实证研究．并提出软件企业R＆D治理结构与机制有待于进一步深入研究的问题． 相似文献
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76.
Guo R Li SB Zhao LN Zhao YS Lu W Yuan P Deng P Liao F 《Journal of Zhejiang University. Science. B》2007,8(12):867-874
There was a slow-relaxing tail of skeletal muscles in vitro upon the inhibition of Ca^2＋-pump by cyclopiazonic acid （CPA）. Herein, a new linearly-combined bi-exponential model to resolve this slow-relaxing tail from the fast-relaxing phase was investigated for kinetic analysis of the isometric relaxation process of Bufo gastrocnemius in vitro, in comparison to the single exponential model and the classical bi-exponential model. During repetitive stimulations at a 2-s interval by square pulses of a 2-ms duration at 12 V direct currency （DC）, the isometric tension of Bufo gastrocnemius was recorded at 100 Hz. The relaxation curve with tensions falling from 90% of the peak to the 15th datum before next stimulation was analyzed by three exponential models using a program in MATLAB 6.5. Both the goodness of fit and the distribution of the residuals for the best fitting supported the comparable validity of this new bi-exponential model for kinetic analysis of the relaxation process of the control muscles. After CPA treatment, however, this new bi-exponential model showed an obvious statistical superiority for kinetic analysis of the muscle relaxation process, and it gave the estimated rest tension consistent to that by experimentation, whereas both the classical bi-exponential model and the single exponential model gave biased rest tensions. Moreover, after the treatment of muscles by CPA, both the single exponential model and the classical bi-exponential model yielded lowered relaxation rates, nevertheless, this new bi-exponential model had relaxation rates of negligible changes except much higher rest tensions. These results suggest that this novel linearly-combined bi-exponential model is desirable for kinetic analysis of the relaxation process of muscles with altered Ca2^＋-pumping activity. 相似文献
77.
One and two dimensional chloride ion diffusion of fly ash concrete under flexural stress 总被引：1，自引：0，他引：1
A preloading frame is firstly designed to accurately apply external flexural stress to concrete specimens. Then a method is
developed to measure one and two dimensional (1D and 2D) chloride ion concentrations at different distances from the surface
of concrete under flexural stress. Using this method and the preloading frame, 1D and 2D stress-diffusion is systematically
investigated for fly ash concretes made with different fly ash contents (0%, 10%, 20%, 40%, and 60%), and water to binder
ratios (0.3, 0.35, and 0.4). The stress accelerating effect on 1D and 2D chloride ion diffusion is also quantitatively analyzed
through a comparison between stress-diffusion and nonstress-diffusion. A diffusion accelerating effect caused by external
flexural stress can clearly be observed through the comparison. In order to quantify the stress accelerating effect, a stress
accelerating factor is proposed in this paper. The relationship between stress accelerating factor and external stress-to-ultimate
stress ratio is given as an exponential function. Finally, the process of the initiation, prorogation, and distribution of
microcracks on the tensile face of specimen is observed in-situ by using a small-sized loading frame and scanning electron
microscope (SEM). The above research provides an insight into chloride attack on the edge reinforcing bars of concrete structures
under flexural stress, such as large-span beam and board in the field of civil engineering. 相似文献
78.
Based on effective media theory, a predictive model, relating chloride diffusivity to the capillary pores, gel pores, tortuosity
factor, and pore size distribution of hardened cement, is proposed. To verify the proposed model, the diffusion coefficient
of chloride ions, the degree of hydration, and peak radius of capillary pores of cement paste specimens were measured. The
predicted results for chloride diffusivity were compared with published data. The results showed that the predicted chloride
diffusivity of hardened cement paste was in good agreement with the experimental results. The effect of the evolution of pore
structures in cement paste on chloride diffusivity could be deduced simultaneously using the proposed model. 相似文献
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80.
皇甫谧《三都赋序》之真伪及其价值趋向 总被引：1，自引：0，他引：1
梅运生 《安徽师范大学学报(人文社会科学版)》2002,30(5):559-564
依据<晋书>等史料,考核左思兄妹出生、写作和皇甫谧的<三都赋序>成书的年代,与皇甫谧卒年相对照,证明皇甫氏作序事,时间是吻合的.皇甫谧赋论,在中古诗赋理论发展史上占有重要位置,他开始修正汉儒以政治功用论排斥诗赋审美价值的见解,明确要求把两者完美结合起来,为儒家诗学在新时期的发展开辟了一条新的途径. 相似文献