1609—1615年长江下游地区梅雨特征的重建

根据明代李日华的《味水轩日记》和项鼎铉的《呼桓日记》中有关浙江嘉兴地区的夏季天气、感应记录,重建了1609-1615年夏季嘉兴地区的降水序列,并确定其梅雨期的入梅和出梅时间。据此,对上述年份梅雨进行了分类,其降水在雨期开始、结束日期和持续时间等特征上与现代浙江北部地区的梅雨特征均存在一定差异。进而根据地方志中的旱涝灾害情况,分析了梅雨特征与长江中下游地区旱涝的关系,二者虽然有密切关系,但不是完全意义上的契合,甚至有些年份完全相反。这对于了解小冰期前期的梅雨活动和特征以及与长江中下游地区旱涝状况均具有重要意义。     

故宫藏清代松花石砚概述

一清宫皇帝御用的松花石砚1.清代康熙朝松花石嵌螺钿池砚（图1）。长18.5、宽12.6、高3.2厘米。砚为松花石制,长方形,呈绿色。砚面前端为砚池,池中嵌一螺钿。砚池四周凸雕流云海水山石,右侧雕一螭龙隐身于云海之中,取寿山福海之意。砚池下方为圆形砚堂。     

Construction of a quartz OSL standardised growth curve (SGC) for aeolian samples from the Horqin dunefield in northeastern China

It has been suggested that the standardised growth curve (SGC) method can be used to de-terminate D_e accurately and reduce the measurement time. However, different opinions regarding the applicability of the SGC method exist. In this paper, we report the construction of quartz OSL SGC for 35 aeolian samples from different parts of the Horqin dunefield in northeastern China, and then test their applicability for D_e determination. Our results suggest that: 1) up to a regeneration dose of 80 Gy, the SGC of the Horqin dunefield can be fitted using the exponential plus linear equation, with the r² value of 0.97, and all the regeneration dose points closely stick to the fitting line, implying that all samples share a very similar dose-response curve; 2) for samples with Des ranging from 1 to 50 Gy, the ratios of SAR D_e to SGC D_e fall within the range of 0.9–1.1, and the average ratio of SAR D_e to SGC D_e is 1.01±0.01, close to unity. Therefore, the construction of SGC is correct, and the SGC is an effective procedure for accurate D_e determination for samples from the study area.     

关于根敦群培二十七幅绘画作品的初步研究（英文）

<正>Although it was difficult,by dint of countless efforts,I made Illustrations unfolding various lands:The regions,houses,men and women,The various sorts of wondrous trees and flowers.dGe vdun chos vphel,the most outstanding twentieth-century Tibetan master of humanism,not only undertook extensive research into such academic fields as history,religion,language and geography,but also had significant achievements in the arts.He broadened the framework of traditional Tibetan art,studied and absorbed Western artistic     

Numerical Fragility Analysis of Vertical-Pile-Supported Wharves in the Western United States

This study develops seismic fragility curves for vertical-pile-supported wharves commonly found in the western United States. Nonlinear time-history analyses of a two-dimensional numerical model under two ground motion suites are performed. The results show that the jumbo container cranes increase by 10.8% in the wharf deck drift. By using the experiment-based limit states, the proposed fragility curves demonstrate that, at a PGA of 0.50 g, the probabilities of exceeding slight, moderate, extensive, and complete limit states are approximately 23.0%, 7.0%, 4.0%, and 3.0%, respectively, while at a PGA of 1.00 g, the exceeding probabilities increase to 44.0%, 19.0%, 14.0%, and 11.0%, respectively.     

Macro-Modeling of Reinforced Concrete Structural Walls: State-of-the-Art

During the past decades, various analytical macroscopic models of structural walls have been developed for simulating the seismic behavior of reinforced concrete (RC) walls. Due to the inherently complicated characteristics of RC walls, macroscopic models that can capture all the important response characteristics with good accuracy and applicability are very challenging to establish. A thorough review of the four main types of mathematical macro models of RC walls, i.e., the vertical-line-element-model, the 2-D shear panel element model, the equivalent truss model and the fiber-based model, is presented to discuss the methodology behind each model and examine the corresponding merits and disadvantages. Suggestions are also made for the further research of the macro modeling of structural walls.     

Testing the standardized growth curve (SGC) to OSL dating coastal sediments from the south Bohai Sea, China

It has been suggested that the standardized growth curve (SGC) method can be used to accurately determinate equivalent dose (D_e) and reduce measurement time. However, different opinions regarding the applicability of the SGC method exist. In this paper, we evaluated quartz OSL SGCs of marine and coastal sediments of different grain sizes and different cores in the south Bohai Sea in China, and tested their applicability to the determination of D_e values. Our results suggested as follows: (1) The SGC method is applicable to both multiple- and single-aliquot regenerative-dose (MAR and SAR) protocols of OSL dating and efficiently provides reliable estimates of D_e. (2) Finesand quartz of different palaeodoses showed highly similar dose-response curves and an SGC was developed, but old samples using the SGC method have large uncertainties. (3) For coarse-silt quartz, two different types of dose-response curves were recorded: low-dose (≤60Gy) and high-dose (≥100Gy). The growth curves of low-dose quartz were similar to each other, facilitating the use of SGC in D_e estimations, but errors tended to be larger than those obtained in the SAR method. For high-dose (100–300Gy) quartz, the SGC was also found to be reliable, but there was large uncertainty in D_e (>300Gy) estimation. We suggest that SGC could be employed for the dating of marine and coastal sediments dating using either MAR or SAR OSL protocol and either fine-silt, coarse-silt or fine-sand quartz.     

视觉文化背景下博物馆展示价值定位——自然博物馆陈列的新体悟

博物馆展示艺术是一种诉诸视觉器官的文化形态。为观众提供可欣赏、受教育的展示精品,是博物馆追求的永恒主题。本文通过对博物馆展示主题、创意设计、科技维新及视觉艺术四方面进行思考,发掘博物馆自身所蕴藏的艺术价值和文化价值是当代视觉文化背景下展示艺术的价值定位。     

养心殿正殿外檐窗罩海墁彩画年代考证及其工艺特征

故宫博物院养心殿正殿保留了明代嘉靖年间至清代末期多种类型的彩画遗迹,其中正殿东暖阁后檐东西明瓦窗罩和梅坞西窗罩绘制了海墁彩画,与整体区域的和玺彩画、旋子彩画风格迥异。作者通过实地勘察、科学检测分析并结合历史文献,考证了养心殿正殿外檐窗罩海墁彩画遗存的工艺和材料特征及其确切年代,揭示了彩画所折射出的皇帝、太后的审美喜好。     

大都市区民宿和酒店业竞争格局演化及成因探测——上海案例

大都市区民宿和酒店业的空间竞争区位识别及其态势驱动力解析是实现都市旅游住宿业多业态共赢与全域可持续的重要现实条件。本文利用GIS空间分析技术和地理探测器,从微观尺度刻画上海市民宿和酒店业的空间竞争格局演化特征并探测其影响因素。研究发现：①上海市民宿业和酒店业集聚热点均趋向群集演化,民宿业历经“零星单点、单核、双核引领+郊区多组团”演化阶段且具有显著的景区指向性;酒店业历经“单核、单核强化、面状集聚+点状环绕”演化阶段且具有显著的城市商业中心指向性;②民宿业与酒店业的空间竞争程度加剧,竞争范围扩大,竞争形式由酒店业近乎垄断的空间剩余竞争发展为空间非剩余竞争和剩余竞争并存,最终形成空间竞争与错位共生并存状态。③文旅禀赋、商业设施和人口集聚是影响民宿和酒店业微观布局的主要因素,地价和交通条件的影响次之;经营理念、客群定位、经济实力以及空间载体差异是造成民宿和酒店业格局分异的隐性宏观动因。