过渡段施工桥头跳车病害的综合加固施工技术     

马金池 《石家庄铁路职业技术学院学报》2006,5(2):30-35

结合济焦新高速公路过渡段施工的具体情况，介绍为解决桥头跳车病害，采用粉喷桩进行地基加固、桩柱、肋板式桥台和回填的施工方法、施工工艺及质量控制要点．  相似文献   

干/湿纺制初生中空纤维膜数学模型的数值模拟     

法德勒  许振良 《上海大学学报(英文版)》2004,8(2):213-220

In an effort to find the effect of mass transfer ,surface tesion and drag forces on the velocity distribution,the mathematical model of the velocity profile of a nascent hollow fiber during membrane formation in the air gap region was numerically simulated by using the Runge-Kutta method (fourth-order method).The effect of mass transfer on velocity distribution based on the complicated function(G(Ch^s))was presented and the dffects of a complicated function were studied in two cases:in the first case,G(Ch^s) was constant;in the second,G(Ch^s) was variable.The latter was done by varying with the concentration of solvent in a nascent hollow fiber through the air-gap region.One empirical equation was used to describe this change and the predected values had a better agreement with the experimental values.To verify the moedl hypotheses,hollow fiber membranes were spun from 20:80 polybenzimidazole/polyetherimide dopes with 25.6 wt％ solid in N,N-dimethylacetamide (DMAc) using water as the external and internal coagulants.Based on the experimental results of dry-jet wet-spinning process for the fabrication of hollow fiber membranes,it is found that the model calculated values were in a good agreement with the experimental values.  相似文献   

Factors influencing pro-environmental collaborative collective behaviors toward sustainability transition – a case of renewable energy     

Tomoko Mori  Tomohiro Tasaki 《Environmental Education Research》2019,25(4):566-584

The transformation to sustainable social systems requires both individual and collective pro-environmental behaviors. In this study, we quantified the impacts of factors that promote or impede collective pro-environmental behaviors around the use of renewable energy. An online questionnaire was completed by Japanese high school and college students, and covariance structure analysis was performed on groups with strong or weak intention to participate in collective behaviors and groups with rich or little experience with community activities. Our results revealed that the belief that a global environmental crisis can be avoided by individual efforts was negatively related to collective behavioral intention. We also found that environmental education that aimed to enhance attachment to community and social norms, would be effective for the youth with weak collective behavioral intention, but not so for youth with strong collective behavioral intention. It would be more effective for youth with strong collective behavioral intention to learn the practical approaches for community participation and raise awareness of the perceived importance of collective pro-environmental behaviors.  相似文献   

国际教师教育范式转移及其哲学基础   总被引：1，自引：0，他引：1  

ZHOU Chenghai 《外国教育研究》2008,(12)

20世纪80年代以来,国际教师教育研究与实践出现了一种话语上的转向,这种转向实际是教师教育范式的转移。新的教师教育范式在目标确定、组织管理和课程教学等方面都呈现出新特征。与建立在客观主义哲学基础上的传统教师教育范式不同,新的教师教育范式以主观主义哲学为基础,两种哲学对知识与人性的不同看法是两种教师教育范式差异的根源。  相似文献   

卢梭的自然教育思想与我国特殊教育实践的转向     

赵娜  张业茂 《培训与研究》2008,25(10):106-108

目前我国的特殊教育普遍存在脱离儿童的现象,其结果严重影响了特殊儿童的康复。卢梭在其著作《爱弥儿》中从归于自然、顺应天性的教育理论出发,提出了自然教育的思想,强调教育要关注儿童,只有这样才能完成“自然人”的发展目标。本文试图通过对卢梭自然教育思想的分析,从中获得一些启示,使其更好地指导我国特殊教育实践的发展。  相似文献   

试论影响中美关系转折的“苏越”因素     

党庆兰 《青海师范大学学报(哲学社会科学版)》2002,(4):76-79

20世纪70年代末，中美两个对抗了20多年的大国实现了关系正常化。中美关系能在20世纪70年代实现根本性的转折，主要是因为苏联的崛起和扩张对美国的世界战略，中国的安全及世界和平构成了威胁，再加上中越两国关系的降温及矛盾的进一步深，才促成中美关系的解冻。  相似文献   

Teaching in transition: Examining school-based gender inequities in central/southeastern Europe and the former Soviet Union     

Cathryn Magno  Iveta Silova   《International Journal of Educational Development》2007,27(6):647-660

In the last decade, gender equity has become one of the most prominent issues in education reform efforts worldwide. Yet, questions of gender equity have received very little attention in the education reform efforts in the post-socialist countries during the transition period. Focusing on the political, economic, and social changes of the 1990s, this article examines school-based gender equity as it is treated in textbooks, curriculum, teacher attitudes, school environment, leadership and tracking. The article presents gender-sensitive strategies for reform and explores how existing ‘gender-neutral’ education practices detrimentally affect gender equity in schools, providing country-specific examples. The article concludes with recommendations for teaching in transition, given the education sphere's strong potential to redress gender inequities.  相似文献   

浅谈"先工业化后社会主义化"与过渡时期总路线的关系     

王保彦 《临沂师范学院学报》2001,23(5):62-63

过渡时期总路线是中国共产党在具体的建设实践中根据客观条件的变化对"先工业化后社会主义化"政策的继承和发展.正确认识这一转变是更好地理解我国由新民主主义社会向社会主义社会过渡的关键.  相似文献   

环氧合酶-2(COX-2)通过调控细胞上皮间质转化(EMT)促进卵巢癌细胞迁移及其耐药性     

Lin DENG  Ding-qing FENG  Bin LING 《Journal of Zhejiang University. Science. B》2020,21(4):315-326

目的:研究环氧合酶-2(COX-2)对卵巢癌细胞迁移和耐药性的影响及其机制。创新点:本研究发现COX-2对卵巢癌发生发展有一定的促进作用,可以通过上皮间质转化(EMT)途径促进卵巢癌细胞的迁移和顺铂(CDDP)耐药。其抑制剂塞来昔布(CXB)能起到协同抗癌的效果。方法:CCK-8检测CXB和CDDP对SKOV3和ES2细胞的毒性作用。划痕实验评估COX-2对卵巢癌细胞迁移的作用。蛋白质免疫印迹(western blot)和聚合酶链式反应(PCR)检测EMT相关基因和蛋白的表达水平。结论:COX-2可以通过EMT促进卵巢癌细胞迁移和CDDP耐药;CXB可以起到抑制作用,与CDDP协同抗癌。COX-2可以作为卵巢癌治疗的一个潜在靶点。  相似文献   

不同生境甜槠黄酮类化合物含量及成分分析     

葛明菊  邵红  边才苗 《台州学院学报》2002,24(6):56-58

运用分光光度法测定了来自浙江台州境内天台山不同生境的甜槠黄酮类化合物的含量并对其成分进行了聚酰胺薄层层析分析。结果表明,甜槠不同生境的叶片黄酮类化合物以冠层生境含量最高,灌丛生境次之,林下生境含量最低;林下生境的黄酮类化合物成分最少,而冠层生境的成分最多。  相似文献