Monitoring the frozen duration of Qinghai Lake using satellite passive microwave remote sensing low frequency data

The Qinghai Lake is the largest inland lake in China. The significant difference of dielectric properties between water and ice suggests that a simple method of monitoring the Qinghai lake freeze-up and break-up dates using satellite passive microwave remote sensing data could be used. The freeze-up and break-up dates from the Qinghai Lake hydrological station and the MODIS LIB reflectance data were used to validate the passive microwave remote sensing results. The validation shows that passive microwave remote sensing data can accurately monitor the lake ice. Some uncertainty comes mainly from the revisit frequency of satellite overpass. The data from 1978 to 2006 show that lake ice duration is reduced by about 14--15 days. The freeze-up dates are about 4 days later and break-up dates about 10 days earlier. The regression analyses show that, at the 0.05 significance level, the correlations are 0.83, 0.66 and 0.89 between monthly mean air temperature （MMAT） and lake ice duration days, freeze-up dates, break-up dates, respectively. Therefore, inter-annual variations of the Qinghai Lake ice duration days can significantly reflect the regional climate variation.     

天山大峡谷国家森林公园土地利用变化及生态系统服务价值研究

通过对1990年、2000年、2010年和2018年4期遥感解译的土地利用数据,采用土地利用动态度、生态系统服务价值评价和敏感性分析等方法,分析了研究区的土地利用变化及生态系统服务功能,同时以ArcGIS软件为支撑,探讨了天山大峡谷国家森林公园在不同时期内的土地利用变化对生态系统服务(ESV)的影响.研究结果表明:19...     

2010-2013年第12届全运会周期江苏省体操队女子运动员损伤调查与分析

女子体操运动员具有训练周期短、专业化早的特点,近年来我国女子体操运动员的运动寿命有所延长,但仍然存在大量因伤病问题直接或间接导致较早结束运动生涯的运动员。通过文献资料﹑问卷调查、数理统计等方法,对2010-2013年第12届全运会周期中江苏体操女子运动员损伤的情况进行调查。结果表明：江苏体操女队运动员损伤的主要原因是教练员对损伤没有引起高度的重视;缺乏一定的理论知识;运动员技术掌握不精确;局部负担过重等,并针对此提出了相关的预防措施,以期为江苏江苏体操女队运动员训练时避免损伤提供参考,更好地提高竞技水平。     

中国国家大剧院模型风荷载风洞实验

介绍中国国家大剧院模型表面风荷载的风洞实验结果。首先对它的半椭球表面在大气边界层中的风压分布及增加表面粗糙度的影响进行研究,实验结果表明在不同风向下它的风荷载具有很好的规律性。有环境影响的对比实验结果表明人民大会堂对大剧院的风荷载有较大的影响。     

BloomRouter： A Framework for Dissemination of Compressed XML Stream

As our best knowledge, in the Publish/Subscribe application environment, few research work has been done on the dissemination and routing of compressed XML （extended markup language） data. A high-speed compressed XML data routing and dissemination framework BloomRouter is proposed. In BloomRouter, a Bloom Filter based prefilte ring mechanism is used to filter out compressed XML elements that users do not care; after that an interval tree dis seminator forwards target elements to the corresponding end users by matching the incomming compressed XML elements with indexed users＇ query regions. Based on this framework, we can efficiently filter/query the compressed incoming XML data, and then route the query result to the corresponding subseriber.     

江苏省体能主导类项群竞技实力研究

以江苏省在近三届全运会上体能主导类项群运动成绩为研究单位,分析了江苏省竞技实力的发展与奖牌变化特征,探讨了江苏省所处的竞技战略地位和竞技项目群体发展趋势。研究表明:江苏省体能主导类项群竞技实力整体呈上升趋势,并形成了以速度性项群为主导,快速力量性项群为中坚力量和耐力项群居中的发展格局;奖牌数量呈递增趋势,在第十届全运会上个别项目出现了"假优势"现象;整体竞技实力在六省市中处于中下位置,项目发展存在较大的竞争压力;项目群体呈现偏态发展趋势。由此,在保障速度性项目竞技实力发展,稳固快速力量性项目和提高耐力性项目发展的竞技基础上,合理调控竞技群体发展结构是保证其整体竞技实力健康发展的前提。同时,还要借鉴其他省市经验、教训及相关理念等促进其更好更快发展。     

宇宙学与战略"大思维"

宇宙学在近当代获得了长足发展,而这一发展正是孕育于强大而极富创造性的思维母体。从一般系统理论的角度来说,公司或政府机构等大型商业或政治组织的领导人可以利用宇宙学及其思维方法,进行战略性“大思维”,从而做出正确的决策。在本文中,作者不仅对宇宙学的具体理论和原则进行了归纳总结,而且还提出具体实例,以为这些领导人运用宇宙学进行战略高度的“大思维”提供佐证,从而进一步证明,“大思维”对于在复杂的现代组织中取得成功具有重要意义。     

大跨度公共建筑的结构选型探析

大跨度建筑设计所采用的技术往往能反映一个国家的建筑技术水平,甚至可以说是与国家的发展息息相关。本文总结了现代建筑空间结构形式的发展趋势,以国家体育馆和国家大剧院为例详细分析了现有的结构形式,探讨大跨度结构选型多样化的可能性。     

西藏马线粒体DNA D-loop区的遗传多样性

对西藏拉萨和泽当两个地区23匹西藏马的线粒体DNA控制区(mtDNA D-loop)部分片段进行序列分析, 检测出16个单倍型, 包括32个核苷酸多态性位点(其中转换位点31个, 缺失位点1个), 占所分析位点总数的9.27%. 单倍型多样性(h)和核苷酸多样性(π)分别为0.93±0.04和2.51%±0.16%, 表明西藏马的遗传多样性较丰富. 基于23匹西藏马序列以及现代欧亚马群的mtDNA序列, 进行了系统发育分析和多维尺度分析. 结果表明, 西藏马在母系遗传关系上与近东、 中亚以及欧洲家马有较近的亲缘关系, 与东亚的蒙古马以及韩国马亲缘关系较远.     

A feedback-based web search engine

Web search engines are very useful information service tools in the Internet. The current web search engines produce search results relating to the search terms and the actual information collected hy them. Since the selections of the search results cannot affect the future ones. they may not cover most people‘s interests. In this paper, feedback informarion produced by the users‘ accessing lists will be represented By the rough set and can reconstruct the query string and influence the search results. And thus the search engines can provide self-adaptability.     

侗族鼓楼大歌的文化考察

鼓楼,作为侗族最具代表性的符号之一,不但是我国民族建筑的瑰宝,也是世界上罕见的艺术创造。它辐射侗家生活的各个方面,以鼓楼为中心所进行的所有活动在长期的实践中相互交融,形成了所谓的"鼓楼文化"。鼓楼是侗族人民自古以来唱大歌约定俗成的场所,鼓楼与大歌的结合就是我们所说的鼓楼大歌,鼓楼大歌也有广义与狭义之分。本文着重分析了鼓楼大歌的音乐形态特征,分别从旋法、音阶调式和曲式结构三个方面作了分析论述,展示了鼓楼大歌与所有多声歌的共性与自己独特的个性。     

第22届世界女排大奖赛总决赛中国女排技术统计分析

对2014年第22届世界女排大奖赛总决赛中国女排比赛的各项技术数据进行统计学分析,研究结果表明:中国女排在身体素质上具有一定的身高、扣球高度和拦网高度优势,但是年龄偏小,普遍年轻化,经验不够;在扣球得分率和拦网得分率方面不如对手;在发球得分率方面与对手基本持平,表现一般;在防守方面与世界强队还存在一定的差距,尤其与技术全面的巴西和日本女排相比差距明显.     

京杭大运河（徐州）表层沉积物中多氯联苯分布特征研究

为确保南水北调东线工程的调水水质,掌握京杭大运河（徐州）中多氯联苯的污染特征,本研究利用气相色谱—电子俘获检测(GC-ECD)法对京杭大运河（徐州）的七个断面取得的表层沉积物中的12种PCBs同系物进行定量分析测定。研究显示,沉积物中的PCBs的浓度范围在16.55 ng/g～114.31ng/g,均值为47.44 ng/g。其中,邳州段的三个断面平均含量最高,并出现了研究区的最高值。在利用潜在生态危害指数法和加拿大环境委员会制定的SQG评价方法对其进行了初步风险评价后,两种评价方法结果都显示,京杭大运河（徐州）表层沉积物中的PCBs已呈现出明显的生态风险。     

2011年李娜在网球四大满贯赛事单打比赛中的非受迫性失误特征研究

通过文献资料、数理统计、录像观察等方法,对李娜在2011年网球四大满贯赛事单打比赛中非受迫性失误进行统计与分析。结果表明:李娜在2011年四大满贯比赛中非受迫性失误多出现在正反手底线抽击球时;李娜进攻技术过于强调底线抽球技术而对其他技术有所忽略。     

发挥运河文化功能发展镇江旅游业

镇江是长江的重要港口,也是京杭大运河沿线重要城市.古运河,承载着镇江从古到今的财富与文明,也记录了镇江历史变迁,是孕育镇江文明的母亲河.运河与镇江地域文化的发展密切相联.对今天运河镇江段的功能变迁进行客观全面地分析,充分发挥运河文化功能,在发展旅游经济,重塑城市形象,提高城市竞争力方面意义很大,是镇江实施可持续发展战略的一个重要载体.     

南北大运河——兼论运河文化的研究和保护

中国在先秦就有运河开凿,隋炀帝时疏凿了沟通首都洛阳的通济渠和永济渠。通济渠循邗沟越长江,并疏凿通江南运河而达杭州。元朝建都于今北京(大都),疏凿南北大运河,沟通从北京到杭州的航运。事实上钱塘江以南在先秦已有运河,经历代疏凿,皆称浙东运河,从杭州越钱塘江经绍兴至宁波长期畅通。故南北大运河,通常称京杭运河,而终点实在宁波,故应称京甬运河。南北大运河沿线文化资源丰富,因年代久远,多已破坏散失,实应修复保护。近年来绍兴市、县已经致力于此,成就可观,值得沿运各地的重视和仿效。     

Mitochondrial DNA analysis of Bronze Age horses recovered from Chifeng region, Inner Mongolia, China

In this study, mitochondrial DNA (mtDNA) analysis was carried out on 9 Bronze Age horses recovered from Dashanqian and Jinggouzi archaeological sites in Chifeng region, Inner Mongolia. China to explore the origin of Chinese domestic horses. Both mtDNA 16S rRNA gene and control region (D-loop) fragments of ancient horses were amplified and sequenced. The analysis of the highly conservative 16S rRNA gene sequences indicated that the burial environment of Chifeng region is suitable for the preservation of ancient DNA (aDNA). Combing 465 mtDNA D-loop sequences representing different breeds from East Asia, Central Asia, Near East and Europe, we constructed a phylogenetic network to investigate the relationship between ancient and modern horses. The phylogenetic network showed that the 9 horses were distributed into different modern horse clusters which were closely related to them representing a certain geographical distribution. Our results showed that the maternal genetic line of the ancient horses in Chifeng region was highly diversified, which contributed to the gene pool of modern domestic horses and suggested a complex origin of domestic horses in China.     

Mitochondrial DNA analysis of Bronze Age horses recovered from Chifeng region, Inner Mongolia, China

In this study, mitochondrial DNA (mtDNA) analysis was carried out on 9 Bronze Age horses recovered from Dashanqian and Jinggouzi archaeological sites in Chifeng region, Inner Mongolia. China to explore the origin of Chinese domestic horses. Both mtDNA 16S rRNA gene and control region (D-loop) fragments of ancient horses were amplified and sequenced. The analysis of the highly conservative 16S rRNA gene sequences indicated that the burial environment of Chifeng region is suitable for the preservation of ancient DNA (aDNA). Combing 465 mtDNA D-loop sequences representing different breeds from East Asia, Central Asia, Near East and Europe, we constructed a phylogenetic network to investigate the relationship between ancient and modern horses. The phylogenetic network showed that the 9 horses were distributed into different modern horse clusters which were closely related to them representing a certain geographical distribution. Our results showed that the maternal genetic line of the ancient horses in Chifeng region was highly diversified, which contributed to the gene pool of modern domestic horses and suggested a complex origin of domestic horses in China.     

国家大剧院新近沉积粘性土特征初探

利用国家大剧院及其周围一些工地勘察资料的土工实验成果，并结合国家大剧院岩土工程开挖剖面的实际观察，初步分析了新近沉积粘性土与一般沉积粘性土的区别特征，并应用数理统计的方法，对国家大剧院及其周边地区的新近沉积粘性土与一般沉积粘性土的某些特征进行了相关性对比分析，建立了相应的相关方程。从而探讨出一些影响物理力学性质的主要指标对新近沉积粘性土影响的差异。