温和条件下铜盐催化氯代烷烃的光促进羰基化反应

研究了光促进温和条件下,非贵金属铜盐催化氯代烷烃的羰基化反应.结果表明,以CuC l2或CuBr2为催化剂,可实现氯代烷烃与一氧化碳或二氧化碳的羰基化反应,得到相应的羧酸甲酯,而且CuBr2的催化活性高于CuCl2.在反应体系中添加Na3PO4,可以提高反应的活性和选择性,以CuBr2为催化剂,氯代环己烷为底物,一氧化碳为碳源,环己基甲酸甲酯的产率为35%,选择性为59%.     

易代反思：艾衲居士《豆棚闲话》的思考方式

艾衲居士《豆棚闲话》从多个方面表达了对明清易代的反思。首先,其叙述方式是话本小说中少见的双层叙述,从而在文本内部区隔出一个戏剧化了的书场,并以豆子的自然生长勾画出一个具有时间逻辑的叙述框架,建构了一个与统治集团不同的"豆棚秩序";其次,通过对历史的颠覆,揭示隐藏在正史背后的另一面,达到了对某些时局现象的嘲讽与批判;再次,《豆棚闲话》实际上从多个方面对当时社会秩序进行了反思与批判,形成了与"官话"对应的"闲话"空间,提出依循自然之理建构社会秩序的主张。     

"娜拉走后"的两性风景--以几个文本为个案

鲁迅在"五四"时期提出的"娜拉走后怎样",成为一个世纪以来思考妇女前途命运的重要话题.不同的时代的回答都铭刻着时代意识形态的烙印,都对应于那个时代妇女解放的程度,显示着两性之间的关系特征.从<伤逝>、<五四遗事>、<纸婚年>、<暗示>以及<厨房>等几个典型文本可以清晰看出,"娜拉"经历了一个由沉默被动的客体变成有自主意识的言说主体、经验主体和欲望主体的精神流变.     

"花间草堂"与纳兰性德

《花间词》与《草堂诗余》在明代广为流传,清初依然是文人作词所取法的对象。纳兰性德对"花间草堂"的继承与创新,使得他的词"纯任性灵,纤尘不染"被誉为"国初第一词手"。他的文学活动最频繁的时期正是阳羡派渐趋衰落,浙西派还未形成鼎盛局面的时期,如果不是英年早逝,他应该成为继陈维崧之后的词坛盟主。     

Na?ve Students’ Conceptual Development and Beliefs: The Need for Multiple Analyses to Determine what Contributes to Student Success in a University Introductory Physics Course

This research involved na?ve physics learners who were interested in majoring in science or engineering. In a semester-long quasi-experimental study, open-ended pretests and weekly interviews were used to analyse the progressive development of students’ conceptions relating to sound and wave motion. Semi-structured interviews were also conducted to elucidate: (1) how their conceptions developed from everyday conceptions to unclear scientific conceptions to scientific conceptions, and (2) their beliefs of physics knowledge. Despite efforts to enable these students to learn physics, the findings showed that only two out of ten students developed acceptable physics conceptions during the course that would enable them to pursue the subject to a higher level. Also, students’ conceptual development was found to be related to their cognitive understanding and to epistemological beliefs of physics. Therefore, to facilitate na?ve physics learners’ success in a general physics course, in addition to the acquisition of content knowledge, explicit emphasis needs to be placed on the nature of physics knowledge.     

风格翻译:保留原文语义空白和不确定性——杨宪益戴乃迭夫妇《呐喊》译文赏析

从接受美学中语义空白和不确定性这一术语来分析风格翻译,指出最大程度地在目的语中保留原文意义的空白和不确定性,可以最大程度地保留原文风格,让译文读者可以如原文读者一样在这种空白和不确定性中得到基本一致的审美效果。最后通过杨宪益戴乃迭夫妇《呐喊》译文中的选词赏析原文的风格意义来证实这一观点。     

毛南族傩文化概述

介绍毛南族傩愿种类和傩愿仪式的程序及毛南族傩文化的传承方式.     

Positive temperature coefficient of resistivity effects of semiconducting (Bi1/2Na1/2) TiO3-CaTiO3-BaTiO3 ceramics sintered in air atmosphere

Y3+-doped (Bi1/2Na1/2)TiO3-CaTiO3-BaTiO3 (BNCBT) positive temperature coefficient of resistivity (PTCR) ceramics sintered in air atmosphere were investigated in this study. (Bi1/2Na1/2) TiO3 (BNT) component can remarkably increase the onset temperature Tc of PTCR ceramics with the expensive of the resistivity R25 increase. CaTiO3 (9-27 mol%) component can decrease the resistivity, and adjust the effects of BNT phase on the Tc point. For the sample containing 3 mol% CaTiO3, the Tc raises from 122° to 153° when only 0.6 mol% BNT added, while for the ones with higher CaTiO3 content (9-27 mol%), Tc is only increased by a rate of 8-9°/1.0 mol% BNT. The effects of BNT and CaTiO3 components on Rmln (negative temperature coefficient effect) are also discussed.     

社神崇拜中蕴含的民族交往与融合之规律探析——以广西客家社神崇拜为例

在广西客家聚居区中,有不少以＂那＂或＂盘古＂为名的社坛。这类社坛的存在与祭祀习俗,蕴含着我国民族交往与融合的重要规律——对他族、他族文化尤其是宗教信仰的理解和发自内心的真诚尊重。汉族将南方壮侗族群的盘古神话纳入自己的文化体系,对南方地区的民族融合作用甚大。     

由“李娜法网效应”探讨中国网球运动的发展战略

对目前我国网球运动的＂李娜法网效应＂进行分析总结得出：我国网球运动将在今后得到快速的发展,能够极大提升网球运动在青少年运动员中的影响力,推动我国体育产业的飞速发展,推动中国网球向着更加注重运动员身体体能和力量素质的方向发展,更加注重网球运动员个性的发展。但同时我们还面临着网球群众基础薄弱;网球运动员职业化程度不够;建立健全青少年的发展机制等问题亟需解决。