A Preliminary Study of the Dynamics of Eastward Shifting Cyclonic Vortices

The dynamics of eastward shifting cyclonic vortices are investigated in terms of a barotropic primitive equation model, and six experiments are performed. Both the interaction of a cyclonic vortex with vorticity lumps and the interaction of the vortex with the shearing basic flow may induce the strengthening of the vortex in a short period, however, the vortex intensity still shows a general decreasing tendency over the whole integration time period. The interaction among the shearing basic flow, cyclonic vortex, and multiple vorticity lumps can change the tendency. The merging of the cyclonic vortex with vorticity lumps in the shearing basic flow of positive vorticity is directly responsible for the maintenance and development of the cyclonic vortex.

Intensified Eastward and Northward Propagation of Tropical Intraseasonal Oscillation over the Equatorial Indian Ocean in a Global Warming Scenario

Northward propagation in summer and eastward propagation in winter are two distinguished features of tropical intraseasonal oscillation （TISO） over the equatorial Indian Ocean. According to numerical modeling results, under a global warming scenario, both propagations were intensified. The enhanced northward propagation in summer can be attributed to the enhanced atmosphere-ocean interaction and the strengthened mean southerly wind; and the intensified eastward propagation in winter is associated with the enhanced convection-wind coupling process and the strengthened equatorial Kevin wave. Future changes of TISO propagations need to be explored in more climate models.

POSSIBLE INFLUENCES OF THE TROPICAL INDIAN OCEAN DIPOLE ON THE EASTWARD PROPAGATION OF MJO

Based on multiple datasets, correlation and composite analyses, and case studies, this paper investigated possible influences of the Indian Ocean dipole(IOD) mode on the eastward propagation of intraseasonal oscillation in the tropical atmosphere. The results showed that(1) the 30-60 day outgoing longwave radiation anomalies in the southeastern Indian Ocean and the 30-60 day 850-hPa zonal wind anomalies over the equatorial central Indian Ocean were significantly correlated with the IOD index;(2) during positive IOD years, the anomalously cold water in the southeastern Indian Ocean and the 850-hPa anomalous easterlies over the equatorial central Indian Ocean might act as barriers to the continuously eastward propagation of the intraseasonal convection, which interrupts the Madden-Julian oscillation(MJO) propagation in the eastern equatorial Indian Ocean and western Pacific; and(3) during negative IOD years, the anomalously warm water in the southeastern Indian Ocean and the low-level westerly anomalies over the equatorial central Indian Ocean favor the eastward movement of MJO.

CES Flights Smoothly Moving Eastward

At 8:30 on October 27, the first international flight from Shanghai to Singapore MU576 took off at Pudong Airport. Thus,all international flights and those to Hong Kong and Macao were all moved to Pudong Airport. Besides internationalflights and Hong Kong and Macao flights, the eastward moving also cover some domestic flights, namely flights fromSanya, Haikou, Guangzhou, Shenzhen, Zhuhai, Qingdao, Yantai, Weihai, Weifang and so on in Northwest China, Mid-South China,and East China to Shanghai. After the eastward moving, the flight distribution at two airports in Shanghai changed greatly.

The Eastward Migration Festival:Construct the“Les Lieux de Memoire”of Yugur Society

The“Eastward Migration Festival”is an emerging festival initiated by Yugur scholars,with the collective participation of the masses,and held in some areas of the Yugur,now held four times.As it carries the collective heritage of the Yugur people,the“Eastward Migration Festival”draws on Pierre Nora’s theory of“Les Lieux de Memoire”,and explains why the“Eastward Migration Festival”activity has become the“Les Lieux de Memoire”of Yugur society from three aspects:history,symbol and narrative.

The eastward subtropical countercurrent on isopycnal surface in the western North Pacific

The monthly circulations on isopycnal surface in the western North Pacific are calculated based on the Navy’s Generalized Digital Environmental Model climatological tem- perature and salinity data on a 1/2° × 1/2° grid using a P-vector method. The eastward Sub- tropical Countercurrent (STCC) in the central subtropical gyre has been studied with emphasis on its spatial distribution, vertical structure, volume transport and its nearby eddy phenomenon. The results reproduce the observed feature of STCC, and reveal some new phenomena on isopycnal surface, such as: (1) At σθ = 24.6, there is strong seasonal variability in the distribution, origin and flow status of STCC. There is no STCC in January, February and March. (2) From May to October, a branch of the Kuroshio Countercurrent to the south of Japan merges into STCC, which increases the velocity of STCC and widens its width. (3) The velocity vector field shows that STCC and nearby eddies coexist. (4) The eastward volume transport of STCC across 137.5°E is the strongest in summer with the maximum of 6.9 Sv ( 1 Sv ≡ 106 m3 s?1) in August, and weaker in spring and autumn with 1.7 Sv in April and 1.6 Sv in November. Most of the transports of STCC occur between isopycnal surfaces 24.0σθ and 25.0σθ. (5) The distributions of the zonal flow along 137.5°E show that the flow core of STCC is between 24.3σθ and 24.7σθ .

EASTWARD MOVEMENT OF MIDLATITUDE LOW FREQUENCY WAVES AND THEIR INTERACTION WITH SYSTEM DOWNSTREAM

Within the framework of forcing/dissipation KDV dynamics, the effect is numerically studied of successive east-travelling troughs on quasi-stationary high's ridges downstream. Results show that two types of low-fre- quency transiency are available, depending on the intensities of down-drifting troughs. One is that transiency occurs in strength, i.e., the ridge undergoes transient change in intensity with unchanged position; the other is that transiency takes place in pattern, viz., the breakdown of the quasi-stationary character of the ridge's posi- tion, meaning that the ridge is replaced by a trough, followed by multiple transformation between ridge and trough.

The Period of Strategic Opportunities for China’s Development after the U.S. Eastward Shift of Its Strategic Focus

The period of strategic opportunities for China’s development, in terms of international environment, means the environment, opportunities, conditions and the time limits provided by the period of strategic opportunities. Since the U.S. eastward shift of its strategic focus, the changing China-U.S. relations and major powers games will exert tremendous impacts on the period of strategic opportunities and lead to three new characteristics featuring a more complicated and changeable strategic posture, controllable crisis management and universal values.

The possible pivotal role of the eastward dust transport from Central Asia in the global temperature decrease

glacial-interglacialgyrations 的出现能与 Milankovitch 理论被解释，这通常被考虑。然而，在理论的一些问题的答案还当前没被导出。在从 CentralAsia 研究东方灰尘运输以后，我们发现了在东方灰尘运输和全球温度减少之间有积极反馈机制。这在北半球的 thehigh 纬度区域放大太阳的放射变化的效果，并且导致全球冰川的时代的出现。积极反馈机制在北半球的 thehigh 纬度区域以太阳的放射的减小开始。随后，全球温度减少，全球冰川的历元发生，在哪个枢轴的因素是从 CentralAsia 的东方灰尘运输。与积极反馈机制的理论，在 Milankovitch 理论的一些问题能被解决很好。

俄乌冲突下西方对俄罗斯能源制裁及其应对:实施路径与阶段性效果评估

俄乌冲突爆发后,俄罗斯能源行业始终是西方精准打击的重点目标。西方力图通过全方位能源制裁,在减少俄用于支持战争的能源出口收入的同时,挤压其在欧洲能源市场的空间,实现化石能源供应“去俄化”。为应对西方制裁,俄开始在“向东看”战略的框架下加快开拓亚洲市场。从制裁及其应对效果看,西方未能实现最重要的预期目标——阻止俄罗斯对乌克兰的战争行为。俄罗斯亦功败输赢兼备,在石油行业,俄基本实现了石油出口市场从欧洲到亚洲的战略转向。但在天然气行业,用亚洲市场取代欧洲市场的目标还远未达成。欧洲在寻求替代油气资源、快速降低对俄能源依赖的同时,也付出了溢价购气和经济衰退的昂贵代价。俄乌冲突已使国际能源市场发生重大调整,俄石油出口转向东方是最近30年来世界石油市场最大规模的贸易流转向,全球能源市场供求关系、运输通道、竞争格局和能源结构将进入深度调整期。

美国战略重心东移:战略变迁、战略逻辑与战略影响

冷战后,美国战略重心东移亚太地区的趋势已成为美国推进全球战略的重要特征,其间美国历届政府对亚太地区的战略定位呈现不断增强的态势,基于亚太地区在全球政治经济格局中地位的提升,美国不断加大了对亚太地区的战略资源投入,意在维持和巩固美国主导的国际秩序和美国的单极霸权,其所形成的战略构架主要体现在美国加强在亚太地区的前沿军事存在已常态化,军事威慑力显著增强;不断加大在亚太地区经贸合作中的介入和影响,推进在经贸领域的战略渗透;对中国发展进程的加快表现的战略焦虑和为防止“美国衰落”及为巩固其霸权地位,使得美国对华关系从确定“接触”和“建设性关系”演进到“对华全面战略竞争”,对华遏制的成分不断凸显,由此中国不断增大的发展成就和国际影响力成为美国战略重心东移驱动因素中最重要的变量。时至今日,强化联盟体系、实施战略围堵、注重规则制衡、聚焦高新科技竞争与封堵已成为美国对华遏制和防范的新动向。在意识形态领域,美国从来没有放弃对中国的和平演变,通过全方位的意识形态渗透和推进价值观外交成为美国构筑联合制华阵营的重要策略。同时,中美作为世界重要大国,面临人类共同的危机和挑战,基于两国间共同的利益交汇点,在共存环境下双方也存在寻求合作而非对抗的趋向和空间。中美关系作为当今世界最重要的双边关系,早已超越双边范畴,在很大程度上决定着世界发展的走向和未来国际秩序的构建。

乌尔第三王朝对外战争的演变及其特征

乌尔第三王朝战争史一直以来都是国际亚述学界的重点研究领域。从乌尔纳姆时期的统一战争,到舒尔吉时期的扩张战争,再到阿马尔辛、舒辛和伊比辛时期的防御战争,乌尔第三王朝对外战争经历了从主动扩张到被动防御的演变过程。同时,其对外战争呈现出有选择性的扩张,即“东战西和”的特征,战争的目的一是为了掠夺战利品和战俘,二是为了建立军事缓冲区、保卫王朝核心区的安全,三是为了控制呼罗珊商路,加强和东部伊朗地区的经济文化交流。随着阿摩利人和埃兰人的威胁加剧,乌尔第三王朝统治者的政治目的并未能完全实现,而其短暂的百余年的中央集权制尝试,为后来的两河流域国家统治与治理提供了重要借鉴。

宋本《诚斋集》的东传、递藏及著录

杨万里《诚斋集》宋端平二年(1235)全集刻本,目前仅日本存一部。此本当为明成化四年(1468)日本室町幕府将军足利义政委派京都建仁寺住持天与清启访华,于成化五年归国时带回,此后一直秘藏于建仁寺。江户末期该寺天章禅师酷爱杨万里,曾据此本刊行《千虑策》三卷、《东宫劝读录》一卷。明治二十年(1887)古泽滋从建仁寺梧庵禅师手中购得此本,带往东京,明治二十八年或稍前转入宫内省图书寮(今宫内厅书陵部)。入藏图书寮前,此本曾经西村兼文数次著录;入藏后不久,又有岛田翰《古文旧书考》予以详细揭载。然此本之缺叶、错简、点逗、批注等问题,诸家著录尚有缺失,故文末拾遗补缺,以期此本著录庶臻完善。

从柳叶刀尖到梓人绳墨--医生“建筑师”与中国近代早期教会医院

作为一种新的建筑类型,现代医院在华创建肇始于西医东渐及其空间营建。医学传教运动对此影响深远,教会医院因而成为中国近代医疗建筑的主要类型,其中尤以基督教会的设计实践最为突出。而在中国近代早期教会医院设计中,由于缺乏专业建筑师的介入,医学传教士们不得不承担起诊疗、传教和建造等多重责任,扮演医生“建筑师”的角色。从柳叶刀尖到梓人绳墨,医生“建筑师”在中国近代教会医院设计中的早期探索既体现了西方教会建筑在中国的调适,也开启了中国现代医院建筑的类型化发展,是中西医学交流的物质空间见证和中西建筑交流的特殊类型例证。

西学东渐与《天问》研究的嬗变

明清之际西方传教士入华,出于“知识传教”的目的,以学者身份进入中国,接触并引用《楚辞》传教,并以天主教教义解读《楚辞》,乃至译介《楚辞》以推寻教义,从侧面推动了《楚辞》的传播与研究。更为重要的是,传教士带来的西方宇宙体系与天文、地理知识为中国学者解读《楚辞》提供了新材料与新视野,明代万历以后部分《楚辞》研究著作中已然渗入西方天文学理成分,清代《楚辞》研究中体现得更为明显。这一时期注家或援引西学以证己说,或广征材料以备参详,明清之际楚辞学新变建立在中西方文化交流的基础之上,取得了更为辉煌的成果。

中国古代园林观月空间“景月同构”设计探析——以明清园林为例

经“月岩望月”研究发现,南宋时期已出现符合天文运行规律、“朝对东-南”的观月景观营建,构景手法表现为月景与地景的同框因借,展现了中国古代园林“景月同构”的空间营造特征。在“景月同构”是否能作为中国古代园林月景设计范式,以及其“朝对东-南”的设计具有哪些共性特征2个问题的导向下,基于古代园林遗存和园记等材料进行统计、筛选,针对观月空间布局与构景要素进行整理。总结出明清园林中成功观月的景点普遍存在“朝对东-南”的方向性特点,并归纳出“有水为宜”“丘壑应变”“景题点睛”“旱园水作”4类中国古代园林观月空间的“景月同构”设计范式。进一步探讨了中国传统园林在月景营建中对天文规律的应用,以期为古代园林观月景点复原定位及现代月景设计在山水地形营造、景观元素布局和观月氛围设计方面提供理论指导。

陕北煤炭东出新径路方案研究

2022年陕北榆林煤炭产量5.84亿t,其中铁路煤炭外运量为3亿t,预测远期铁路煤炭外运量为4.8亿t,其中东出运量2.6亿t。该地区的煤炭东出运输主要依赖于包西铁路衔接太中银—黄韩侯—陇海—包兰等横向铁路通道。由于包西铁路榆林至绥德段能力已饱和,太中银铁路后方径路石太段能力趋于饱和,无法满足区域煤炭进一步东出的需求,研究提出构筑陕北煤炭东出新径路。研究从工程投资、通道规模、运营管理、运输组织、通道布局及沿线经济带动等角度对比分析了2个方案:一是沿既有神木西至瓦塘通道扩能方案,二是沿规划新建榆佳临通道方案。沿既有神木西至瓦塘通道的扩能方案,充分利用既有铁路设施和富余运能,工程建设规模小,服务沿线更多矿区煤炭集运需求,实现路网整体效益最大化;扩能方案形成径路顺直、运输流畅的陕煤东出新通道,有效解决陕煤东向运输能力不足问题,同时释放包西铁路瓶颈区段运能,支撑陕煤南向运输。

世界格局变化中的美伊关系——基于历史视角与全球视角的思考

美伊关系的形成是动态的历史发展过程。当今美伊关系是国际事务中的重要关系,是世界格局中重大矛盾的体现,关系到世界格局变化的走向。北约成立以来成员国不断增多,而且不断东扩,其本身的变化趋势也是国际格局演变趋势的一种体现。坚持反对霸权主义的伊朗,将是阻挡北约东扩的重要力量。通过加强实施“一带一路”倡议,促进伊朗经济和科技的发展,增强伊朗保持社会稳定和保卫国家安全的能力,着力巩固和加强中伊关系,维护全球战略平衡和地区发展稳定,为实现中华民族伟大复兴创造更好的国际环境。

文化交融历史背景下西藏绘画“东渐”探析--以勉萨画派为例

西藏绘画历史悠久、画派众多,其中形成于17世纪的勉萨画派对西藏绘画艺术产生了广泛而深远的影响。随着中华各民族交往交流交融的深入发展,从18世纪开始,西藏绘画特别是勉萨画派在康巴、安多、内蒙古等地区以及清宫廷不断发展与创新,更是衍生出康区勉萨画派、安多勉萨画派、清宫勉萨画派、内蒙古勉萨画派等区域性支派。勉萨画派的“东渐”不仅是中华各民族文化交往交流交融的生动体现,也是维系各民族文化交融的媒介和纽带,而本地化发展则是其“东渐”成功的重要原因。