Neighboring / Adjacent Coupling Relationship Between Urbanization and Farmland Safety Based on the Decoupling Theory

当前我国快速城市化推进对半城市化、农村等近程区域分布的耕地产生直接、强烈的影响,也对耕地安全造成强大的胁迫效应。为此,构建城市化-耕地安全综合评; 价指标体系,分别计算城市化指数和耕地安全胁迫指数,并基于脱钩理论方法对城市化水平与耕地安全水平的近程耦合关系进行量化分析。以江苏省连云港市为例,; 定量分析20002014年间其城市化水平与耕地安全的脱钩-耦合关系及耕地安全对城市化进程的响应程度。结果表明,; 20002014年间,连云港市城市化指数持续增高,耕地安全胁迫指数波动降低;; 20002007年为强脱钩、弱脱钩、扩张负脱钩及扩张脱钩的波动状态;; 20082014年呈更加强烈的波动状态,包括20082012年的强脱钩和2013年的扩张负脱钩状态,这反映出区域发展规划、土地利用规划和城市总体; 规划的实施对这一典型近程耦合系统产生了较大影响。研究期内连云港市城市化水平大幅提高,耕地安全所受胁迫程度不断降低,两者虽总体呈强脱钩关系,但仍需; 注意近程耦合结果波动性较大所揭示的不确定性问题,需要谨慎权衡城市化相关政策对耕地安全的影响。与过去的宏观、单一指标模型相比,基于近程耦合关系提出; 的多指标脱钩-耦合模型更具综合性,能更加全面、精细化分析快速城市化进程与耕地安全保护之间的复杂关系,为半城市化地区景观安全格局评估提供支撑,为城; 市化与耕地保护之间的协调发展提供决策支持。The current rapid development of urbanization in China has directly and; seriously affected farmlands distribution in its para-urbanized; neighboring /adjacent regions,and also posed severe stresses on safety; of these land. It is,therefore,essential to build up a comprehensive; urbanization and farmland safety assessment indicator system,work out; quantitatively urbanization index and farmland safety stress index,and; analyze quantitatively neighboring coupling relations between; urbanization and arable land safety based on the decoupling theory and; method. A case study was conducted of Lianyungang City of Jiangsu; Province to explore quantitatively coupling-decoupling relationship; between urbanization and farmland safety and response of farmland safety; to the progress of urbanization during the period from 2000 to 2014.; Results show that during the study period,urbanization index of; Lianyungang City increased steadily,while farmland safety stress index; fluctuated with a declining trend. Their relationship displayed a wavy; trend from 2000 to 2007,i.e. strong decoupling-weak decoupling-expanding; negative decoupling-expanding connection and a strong fluctuation curve; from 2008 to 2014,including strong decoupling during 2008-2012 and; expanding negative decoupling in 2013,which reflects strong impacts of; the implementation of the regional development,land use and city overall; programs on this typical neighboring / adjacent coupling system. During; the study period,Lianyungang City made a huge and steady progress in; urbanization, while reducing fluctuation of its stress on farmland; safety. Though the two posed a strong decoupling relationship,the; problem of uncertainty reflected in the huge fluctuation of the result; of the neighboring /adjacent decoupling calls for high attention,and the; influence urbanization had on farmland safety needs to be weighed; prudently. Compared to the macroscopic single indicator models used in; the past,the multi-index decoupling-coupling model built for the; neighboring coupling relationship is more comprehensive and capable of; analyzing the complex relationship between rapid urbanization and; protection of farmland safety in a more holistic and finer way.; Furthermore,it may provide theoretical support to landscape safety; assessment of para-urbanizd regions and to decision-making on harmonized; development of both urbanization and protection of farmland.国家自然科学基金; 厦门大学大学生创新创业训练计划; 中国科学院大学生创新实践训练计

The Connotations of Traditional Chinese Maritime Civilization and Maritime Silk Route

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

纳米面心立方金属的变形机制及影响其力学性能的因素

综述了纳米面心立方金属的变形机制随晶粒尺寸的减小而发生的变化，即变形机制由晶界处发射不全位错、形成孪晶转变为晶界滑移、晶粒转动。当变形机制为晶界处发射不全位错、形成孪晶时，存在最佳孪晶形成晶粒尺寸范围，此时的孪晶形核应力最小。另一方面，随着晶粒尺寸的减小，在变形机制发生转变的临界晶粒尺寸附近存在韧一脆断裂方式的转变。提高孪晶密度、在纳米晶材料中加入微米晶相形成双峰晶粒材料可以提高纳米晶材料的塑性，得到更好的综合机械性能

一种用于热催化氧化甲苯的铁离子交换钛离子柱撑蒙脱石催化剂及其制备方法

本发明公开了一种用于热催化氧化甲苯的铁离子交换钛离子柱撑蒙脱石催化剂及其制备方法。本发明以钠基蒙脱石、铁盐、钛盐作为原料，钠基蒙脱石通过钛离子柱撑得到钛柱撑蒙脱石前驱体，经煅烧后得到钛柱撑蒙脱石，然后用铁离子交换钛柱撑蒙脱石，合成铁离子交换钛离子柱撑蒙脱石前驱体，经洗涤，干燥，过筛，煅烧制备得到用于热催化氧化甲苯的铁离子交换钛离子柱撑蒙脱石催化剂。其可有效催化氧化高浓度的甲苯，用于在375℃条件下去除高浓度(>1000mL/m3)的甲笨，甲苯去除率达到90％以上；具有催化活性高、成本低廉、热稳定性好、无二次污染等优点，适用于工业废气中高浓度甲苯的净化处理