11 research outputs found

    On GuoCui School in Late Qing Dynasty——from the Perspective of Academic Community

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    本文的知识社会史尝试,主要从“学术共同体”理论的角度考察“国粹派”所处的基本历史语境、思想谱系及其成员在学术、政治互动中的角色冲突。第一章《绪论》:考察了日本“国粹”和“国粹派”的源流,简要回顾既往关于清末“国粹派”的专题性研究成果,阐述本文涉及的社会学理论、概念,并提出了本文的研究主旨。第二章《国粹派的时代背景》:概述了晚清政治危机,当时经济、社会的主问题,废除科举的影响;大致分析了晚清危局中的思想反应及其内在困难、张力,以及当时的新思想学术资源和学术共同体的思想知识新传播网络。第三章《国粹派的知识结构》:国粹派学术知识的谱系以乾嘉学统为主干,结合浙东、扬州、岭南三地风格,并深受残明遗献、公...This paper tries, from the theoretical perspective of Academic Community, to research into GuoCui School, the historical context in which it was bred up, the thinking genealogy and the role conflict of its members in academic communication and political interaction. Chapter I Introduction: The Japanese origins of GuoCui and GuoCui School are discussed, with a brief review of the previous st...学位:历史学硕士院系专业:人文学院历史学系_中国古代史学号:20030202

    Theoretical Analysis to Traditional Chinese Maritime Civilization

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    本文在中华文明现代化转型语境下,结合社会科学理论概念、工具,对比 西方海洋文明,探讨中国传统海洋文明的发展路径、潜在力量及其与中国传统 文明之间的相互作用。 第一章《前言》:指出中华文明现代化转型的语境,说明具有历史绵延的中 国传统海洋文明是中国文明的子系统,阐明中国海洋叙事对中国文明现代化转 型的意义。 第二章《试析渔业在中国文明形成阶段的劣势》:结合自然科学观点,探讨 捕鱼—渔业为何不能支撑文明,无法成为中国文明的原初主体。 第三章《缘海而生的食盐专卖制度》:结合中国历史社会大背景和西方理论 话语,解析《管子》相关篇章,探讨海盐专卖制度作为间接税种的优势及该税 制的历史...In the context of modernization transformation of Chinese civilization,with the aid of concepts and theoretical means of social science,this thesis compares China’s traditional maritime civilization with that of the western world,explores its development paths,underlying forces and interaction with traditional Chinese civilization. Chapter I Introduction: This thesis notes the context of mode...学位:历史学博士院系专业:人文学院_中国古代史学号:1032006015293

    “建筑适应性”主题沙龙

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    "地域建筑"是当下建筑学界共同尊重的准则,但这一术语的过度使用,也使得其内涵在当代建筑创作中逐渐模糊。本期沙龙主题"建筑适应性",是对"地域建造"这一命题的具体化。"适度"的"适应"是当下应当倡导的地域建筑设计创作原则。"建筑适应性"中的"适应",强调对历史文脉与所处环境的积极回应,研究建筑与环境之间的复杂应答关联;除此,"建筑适应性"还强调对经济、技术、材料的"适度

    The Connotations of Traditional Chinese Maritime Civilization and Maritime Silk Route

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    杨国桢,厦门大学人文学院历史系教授、博士生导师;王鹏举,厦门大学人文学院历史系博士研究生。【中文摘要】进入21世纪,人类进入立体开发、利用和保护海洋的新时代,海洋发展是一个具有全局性、前瞻性、战略性的重大理论和实践问题。自中共十八大提出中华民族伟大复兴的中国梦,海洋强国便成为国家的重要发展战略。继承和弘扬中华海洋文明传统,建设21世纪海上丝绸之路,推进中国文明的现代化转型,是海洋强国的内在诉求。没有古代中国在海洋上的崛起,近代中国在海洋上的衰落,就谈不上当代中国在海洋上的复兴。也就是说,中国海洋文明史是现代化倒逼出来的历史问题,客观与准确界定海洋在中华民族伟大复兴历史进程中的地位,讲好中国故事,需要中国海洋文明史的支撑。 【Abstract】The advent of 21st century has witnessed the coming of the era of exploration and preservation of the sea. Marine development is an overall,prospective and strategic issue in the aspects of theory and practice. To become a strong marine country has been a fundamental national strategy since the raising of great rejuvenation of Chinese nation in the 18th CCP National Congress. To inherit and enhance traditional Chinese maritime civilization,construct the 21st century Maritime Silk Route economic belt, and to push forward the transformation of modernization of Chinese civilization is the inwad expression of a strong marine power. Without the rising of ancient marine China or its decline in the late19th and early 20th centuries, there will be no such thing as marine rejuvenation of China , which means, study of the history of Chinese maritime civilization is triggered by modernization. To precisely and objectively identify the role maritime issues play during the process of the great rejuvenation of Chinese nation, and to tell the story of China, shall want the support of study of the history of Chinese maritime civilization.教育部哲学社会科学研究重大课题攻关项目“中国海洋文明史研究”(09JZD0015

    Spatiotemporal Variability of Rainfall Erosivity in Jialing River Basin

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    降雨侵蚀力是降雨引起土壤侵蚀的潜在能力,对预测土壤侵蚀量具有重要意义。对嘉陵江流域12个气象站的日降雨量资料,利用章文波日降雨侵蚀力模型估算流域的降雨侵蚀力。结果表明:嘉陵江流域降雨侵蚀力的空间变异与降雨量的空间分布趋势基本一致,由东南向西北递减,变化于800~9 000MJ.mm/(hm2.h.a)之间;流域内降雨侵蚀力年际变率Cv在0.346~0.493之间,除平武站呈显著减少外并无显著变化趋势;年内降雨侵蚀力随季节变化,夏秋季降雨侵蚀力较大,冬春季降雨侵蚀力较小。降雨侵蚀力年内集中度高,6—9月份的降雨侵蚀力占全年降雨侵蚀力的80%以上。近50a降雨侵蚀力存在35a,21a的主周期变化,且对应不同的丰枯状态。研究结果表明,虽然年降雨侵蚀力无明显变化,但年内却相对集中于夏秋两季,因此仍要做好汛期的水土流失等灾害的防治。Abstract:Rainfall erosivity shows the potential soil erosion induced by rainfall and is very important in predicting soil erosion quantitatively.With the daily rainfall data from 12meteorological stations in Jialing Riverbasin,rainfall erosivity in the basin was estimated and its spatiotemporal variability was analyzed by usingthe daily rainfall erosivity model.Results showed that the spatial characteristic of rainfall erosivity was consistent with the spatial distribution of rainfall,declining from southeast to northwest and varying from 800to9 000MJ·mm/(hm2·h·a).The inter-annual variation was great and Cv was between 0.346and 0.493.However,result from Mann—Kendall test showed there was no significant trend of variation except Pingwustation with a decreasing trend.Rainfall erosivity presented seasonal dynamics in the whole year.The seasonal distribution of rainfall erosivity was highly centralized and rainfall erosivity from June to September occupied 80%of the whole year.Rainfall erosivity had the periods of 21and 35years and different rainy-drierperiods in the last 50years.Through the study,there was no significant trend of variation in annual rainfallerosivity,but rainfall erosivity was relatively concentrated in the summer and autumn.Therefore,somemeasures should be taken to prevent soil erosion or other disasters in flood season

    基于异构光波束的可见光通信覆盖特性分析

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    受限于传统可见光通信(VLC)的研究范式,研究人员在分析可见光无线覆盖时,通常假设光源遵从朗伯空间辐射特性。客观上,上述假设忽视了由不同类型光波束构成的潜在异构光波束,对基于异构光波束的VLC覆盖特性也缺少必要的探索。针对上述问题,综合考虑商用发光二极管(LED)光源的差异化非朗伯光波束特性,文章给出了多种潜在的异构光波束配置方案。同时,在典型室内场景,对传统同构朗伯光波束和文章所提异构光波束的覆盖特性进行了比较分析。量化结果显示,较之于传统朗伯光波束的发射器配置,文章所提异构光波束的配置方案能够引入高达1.97 dB的最小信噪比(SNR)增益,同时将SNR波动幅度从传统设计下的22.75 dB降低至异构设计下的15.33 dB。此外,SNR低于30 dB相对弱覆盖位置占比从初始配置下约13.20%降低至非异构设计下约7.23%。因此,异构光波束对室内空间覆盖的潜在影响获得了初步的证实

    近60年黄河中游水沙变化趋势及其影响因素分析

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    采用线性回归、Mann-Kendall检验、双累积曲线及小波变换等方法系统分析了黄河中游干流及支流渭河、汾河和无定河的6个主要水文站(头道拐、龙门、花园口、华县、河津、白家川)1950s-2009年的水沙序列。在系统搜集流域基本信息的基础上,深入探讨流域水沙变化的特征及其驱动力。研究表明:黄河中游流量和输沙量呈现急剧减少趋势,尤其在20世纪70年代之后,减少更加显著,其中,汾河的水沙减少幅度最为显著,2000年-2009年的年均流量与输沙量相当于1950年-1959年约20%。干流龙门站流量和输沙量的小波变换在1980年代前表现出0.5~1.0a显著周期,且达到95%的置信度水平,之后周期特征减弱甚至消失。气候变化、降雨、水土保持措施(如退耕还林、草,梯田建设,水库淤地坝等工程)等人类活动是水沙变化的主要影响因素,其中,干流的头道拐和花园口水沙变化受干流水库影响较为显著。 更多还原</span

    峡东震旦系陡山沱组宏体化石的新发现

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    飞秒激光制备光纤布拉格光栅研究进展

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    光纤布拉格光栅(FBG)具有抗电磁干扰、耐腐蚀、体积小和成本低等优点,而飞秒激光制备的FBG更具有耐高温的独特优势。文章首先对飞秒激光刻写FBG的3种主流方法,包括飞秒激光相位掩模板法、飞秒激光直写法和飞秒激光全息干涉法进行了介绍,对比分析了各种制备方法的优缺点,其次着重对飞秒激光制备的FBG的温度、压力(应变)和折射率传感的原理及其应用进行了综述,最后指出了飞秒激光制备的FBG在河水、湖泊和海洋等领域环境监测中的应用前景

    高稳定度大功率可控整流稳流电源

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    本实用新型涉及一种高稳定度大功率可控整流稳流电源,该电源是采用十二相全桥可控硅整流,两桥并联,平衡电抗器,带有自动平衡的数字触发板,LC无源滤波,并加有滤波电路对非特征谐波进行特殊处理,电流检测单元采用DCCT,负载为电感性负载,整个系统反馈调节包括一个电压纹波环和一个电流环,保护采用了PLC部件,本实用新型的长期电流稳定度达到±1×10↑[-5],电源效率达到90%,功率因素大于0.9
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