共查询到19条相似文献，搜索用时 156 毫秒
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我国的珍珠行业正陷入高产低值的恶性发展态势中,制约了中国珍珠产业发展。文章从珍珠产业链的构成出发,结合珍珠产业现状分析,浅谈珍珠价值链的重要性,对珍珠产业发展提出一些思考。 相似文献
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海南珍珠业发展之走向 总被引：1，自引：0，他引：1
简介珍珠、珠母贝及其珍珠养殖史;阐述我国珍珠学科确立过程;提出海南珍珠业要健康地发展应注重科学技术、科学管理,尊重科技人员,完善法规保障体系。 相似文献
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21世纪中国淡水珍珠产业的发展态势 总被引：4，自引：0，他引：4
本文从珍珠的利用、养殖历史出发，分析了近20年来中国淡水珍珠的产业发展，对现阶段存在的问题进行了总结，展望21世纪淡水珍珠的产业前景，提出了发展我国淡水珍珠业的对策。 相似文献
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没有钻石的璀璨光亮,没有宝玉的炫目艳丽,珍珠却有其独特魅力。温润细腻的色泽、浑然天成的优美形态,正是珍珠最为迷人的地方。我国自古以来便是珍珠养殖大国,早在1000年前就有养殖珍珠的记录。但这些养殖技术不仅没有得到应有的发展,反而湮没失传。我国这些失传殆尽的人工育珠技术,却于上个世纪初在日 相似文献
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像形珍珠在弘扬特色文化及其旅游纪念品开发方面具有广阔的应用前景。将珍珠文化与妈祖文化结合,应用现代珍珠养殖理论和技术,开展了优质妈祖像形珍珠培育技术研究,旨在为我国发展淡水珍珠养殖业和弘扬中华妈祖文化提供一种新途径。结果显示:(1)不用粘着剂将金属妈祖像形核模植入三角帆蚌,能培育出妈祖像形珍珠,且三角帆蚌的培育效果优于褶纹冠蚌;(2)采用1.5龄手术蚌、薄荷脑麻醉和系统化消毒等方法构建的淡水附壳像形珍珠手术工艺流程,对术后育珠蚌存活率和妈祖像形珍珠质量有促进作用;(3)“蚌+鱼+光合细菌”养殖方式对控制育珠蚌的月死亡量和缩短妈祖像形珍珠的养成时间有利;(4)像形轮廓及其文字肉眼可见、银白光滑的珍珠层表面无肉眼可见的异常凹突及瑕疵等应是优质妈祖像形珍珠不可缺少的特征。 相似文献
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卓赋 《中学语文(读写新空间)》1988,(6)
自读要点《珍珠》一文已编入新编通用初中语文课本第五册。学习本文从不同的方面说明事物的写法,学习本文条分缕析的结构形式。了解关于珍珠的一般科学知识。课文说明本文说明了天然珍珠形成的条件和原理、人工养殖珍珠的操作过程、珍珠的用途,着重说明解放后我国人工养殖珍珠所取得的巨大成就。 相似文献
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周至德 《湖南师范大学社会科学学报》1979,(2)
《珍珠赋》是谢璞于一九七二年发表的一篇优秀的访问记散文。赋,我国古代的一种文体,这里是歌颂、赞美的意思。作品题目为《珍珠赋》,但作者并没有花多少笔墨在真正的珍珠上,而是以珍珠为线索,在突出珍珠的形象之后,根据珍珠跟洞庭湖区农村新景象之间的某种内在联系,即数量多与形象美的共同特征,开拓新意境,描写社会主义农村新景象,歌颂毛泽东思想和毛主席的革命路线。全文可分四个部分。文章开头,即第一自然段,以“芙蓉花开的日子”表示秋天,在“洞庭湖”一词之前冠以“浩瀚”二字,简括而又不乏文采地交代访问的时间、地点。此外,写洞庭湖是“美丽富 相似文献
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冯清高 《广东技术师范学院学报》2002,(2):6-11
科学课程是青少年素质教育的重要渠道。本文在回顾加拿大科学教育发展的基础上 ,对该国科学课程的目标、课程内容与重点、科技教育评价体系的发展与改革做了全面的综述 ,并就我国中小学课程改革中新整合的科学课教学的若干问题进行了讨论 相似文献
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我国旅游学研究是伴随着改革开放的步伐而发展起来的,到现在已有20多年的历程。在这20多年的发展历程中,我国旅游学科理论体系研究积累了许多学术研究成果,但从整体上来说,其构建还不成熟。本文综合论述了我国旅游学科理论体系研究中的一些主要观点、特点以及存在的问题,并提出了科学构建我国旅游学科理论体系的一些方法。 相似文献
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近年来,在科技兴国战略思想的影响下,伴随着终身教育深入人心,中小学教师继续教育事业在我国有了长足的发展,有力地推动了我国基础教育及教师队伍整体水平的提高。但是,在开展继续教育活动过程中也存在着几种突出的矛盾,限制了教师继续教育的发展。我们应对这些矛盾进行理性分析,找出化解的办法,这对改善中小学教师继续教育,提高培训的质量和水平具有现实意义。 相似文献
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In the current investigation, research conducted since 1986 were synthesized to examine the homework – achievement relationship in math/science, and to examine a range of factors that could have moderated this relationship. Our investigation revealed that there was an overall small and positive relationship between homework and academic achievement in math/science. Our investigation further revealed that the homework – achievement relationship in math/science was stronger for elementary and high school students than for middle school students. In addition, the homework – achievement relationship in math/science was shown to be the strongest in the studies involving US students, whereas it was the weakest in the studies involving Asian students. We discussed possible explanations for these and other findings, and the implications for future research directions. 相似文献
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丁文江是我国近代地质事业的开创者和奠基人之一。本文追述了丁文江科学思想的形成及其对地质教育和地质事业的贡献,旨在总结丁文江一生对中国地质事业做出的伟大成就和影响,他尊重科学、注重实践,在当今也是具有现实意义的。 相似文献
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论脑科学的发展及其对现代教学的影响 总被引：7，自引：0，他引：7
近些年来，脑科学研究的进展越来越受到人们的关注，脑科学的研究成果也越来越多地应用于教学领域，不仅为教学理论和教学实践提供了新的解释与理论支持，而且给教学的变革和理论研究带来了新的冲击。正是由于脑科学研究成果的引入，使教学论的研究逐步建立在脑科学的基础上。脑科学研究的进展又使教学冲出了传统教学的藩篱，对现代教学产生了深刻的影响。当下的教学研究应该更加充分地建立在脑科学研究成果基础上，教学实践亦应充分地吸取脑科学的研究成果。 相似文献
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龙滩水库对洪水的调畜结果,使珠江三角洲的洪峰流量较大幅度减少,其中磨刀门减少最多,约2230～3970m3/s,相应的洪峰水位降低20～40cm;从而使三角洲堤围的防洪标准提高并取得显著的防洪效益,初步估算为每年1.38亿元;根据珠江三角洲洪水峰高量大的特点采用堤库结合的防洪体系是解决三角洲防洪问题的有效办法,而龙滩水库的上马修建,则是这一体系的关键。 相似文献
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《Journal of Education for Students Placed at Risk》2013,18(4):431-433
Science Education and Student Diversity: Synthesis and Research Agenda (Lee &; Luykx, in press) analyzes and synthesizes current research on how racial/ethnic, cultural, linguistic, and socioeconomic variability affects science achievement among K-12 students who have traditionally been underserved by the education system. The book begins with science achievement gaps among diverse racial/ethnic and socioeconomic groups. After describing the methodological and other criteria for inclusion of research studies, it summarizes major findings in the literature with regard to the relation of science achievement gaps to science curriculum, instruction, assessment, teacher education, school organization, educational policies, and students' home and community environments. Finally, it proposes a research agenda to strengthen those areas in which the need for a knowledge base is most urgent, as well as those that show promise in establishing a robust knowledge base. 相似文献
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Students' science knowledge and skills are considered critical to growing the intellectual capital on which societies rely to innovate and prosper. However, recent research has documented notable declines in students' intrinsic valuing of science and science achievement in Australia and other western countries. As a result, there have been calls to investigate factors at both the student- and school-level that can improve intrinsic valuing of and achievement in science. Growth feedback from science teachers to students has been identified as one such factor. Growth feedback, which specifically targets individual student growth and improvement, is considered an effective form of teacher feedback. Because recent research has demonstrated the benefits of effective teacher feedback on intrinsic valuing of science and the positive link between intrinsic valuing of science and science achievement, the present investigation examined (at both the student- and school-level) the extent to which growth feedback in science predicts intrinsic valuing of science and the extent to which intrinsic valuing predicts science achievement and mediates the relationship between growth feedback and achievement. This study examined this hypothesized process with the 2015 Australian PISA sample (N = 14,530 students in N = 758 schools) via a multilevel structural equation model. Findings indicated that at both the student- and school-level, growth feedback significantly predicted intrinsic valuing, and intrinsic valuing significantly predicted achievement; growth feedback also had significant indirect effects of achievement via intrinsic valuing. Taken together, our findings indicate that there are personal and whole-school yields for science achievement from the experiences of growth feedback in and intrinsic valuing of science. 相似文献