检索结果-南通市图书馆

Effects of climate variability and land use/land cover change on the Daihai wetland of central Inner Mongolia over the past decades

引用

Journal of Mountain Science 2020年第12期17卷 3070-3084页

作者： CHUN Xi QIN Fu-ying ZHOU Hai-jun DAN Dan xia ying-ying ULAMBADRAKH Khukhuudei Inner Mongolia Restoration Engineering Laboratory of Wetland Eco-environment System Inner Mongolia Normal UniversityHohhot 010022China Key Laboratory of Mongolian Plateau Environment&Global Change Inner Mongolia Normal UniversityHohhot 010022China Department of Geology&Geophysics National University of Mongolia15141Mongolia

The wetland ecosystem and its driving mechanism are significance impact on the ecological environment and the sustainable development of semi-arid regional *** and industrial land use/land cover change(LUCC) is also important for wetland *** Daihai wetland(DW)in Inner Mongolia has been suffering from severe environmental problems such as water resource shortages and wetland areas *** analyzed spatiotemporal LUCC at the catchment scale of Daihai Lake,which has recently exhibited a dramatic loss of water area,and investigated the potential role of climatic changes and human activities in the wetland *** 1976 to 2015,the arable land and construction land increased by 71.72 and 15.81 km2,with ranges of 18.72% and 39.61%,***,the wetland area decreased by 84.47 km2,accounting for 29.07% of the area *** 1960 to 2015,the area of Daihai Lake decreased by 100.73 km^2,diminishing to 37.09% of the area in 1960,and the lake storage accordingly shrank from 12.9×10~8 to approximately 3.9×10~8 m^*** lake level also rapidly *** 1962 to2014,the lake water mineralization,total nitrogen(TN),and total phosphorus(TP) increased by 2410,7.86,and 0.182 mg L-1,*** pollution sources included not only mineral fertilizers and pesticides,but also livestock,poultry breeding,aquaculture,and rural household *** lake area decreased with increasing agricultural development,Daihai power plant(DHPP) water consumption,and catchment climatic ***,the urgent implementation of effective restoration and mitigation measures are needed.

关键词： Semi-arid environment Lake level fluctuation Water shortage Wetland loss

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Runoff variation and its response to climate change in Huolin River catchment,Northeast China

引用

Journal of Mountain Science 2021年第12期18卷 3165-3178页

作者： DAN Dan CHUN Xi SHI Lei xia ying-ying ZHOU Hai-jun WAN Zhi-qiang Inner Mongolia Restoration Engineering Laboratory of Wetland Eco-environment System Inner Mongolia Normal UniversityHohhot 010022China Key Laboratory of Mongolian Plateau’s Climate System Inner Mongolia Normal UniversityHohhot 010022China College of Geographical Science Inner Mongolia Normal UniversityHohhot 010022China

The Huolin River catchment(HRC)is located in the semi-arid region of Northeast China,which is very sensitive to climate *** runoff in HRC is closely related to the recovery of local vegetation in the Greater Khingan Mountains and the survival of downstream *** runoff fluctuations and increasing no-flow days confirmed the water crisis in this ***,it is extremely urgent to study the current situation and characteristics of *** this study,hydrological and meteorological data of HRC during 1956-2018 were analyzed to elucidate the processes,characteristics,trends of the river runoff and revealed its response to climate *** Mann-Kendall test and linear regression method showed that runoff in the HRC demonstrated a downward trend over the study period with a marked annual *** runoff in the high flow years was 100 times that of the low flow years,showing a typical continental climatic river *** are two runoff peak flows in the intra-annual runoff distribution in March and July,whereas two runoff valleys occurred around May and September to *** runoff positively correlates with precipitation in summer and temperature in early *** influenced by rising temperatures in April and precipitation in July is the main driving factor for the two peaks *** rose with precipitation decline and temperature increased,which may influence the runoff *** annual runoff is well synchronized with the annual precipitation,and precipitation change is the main driving factor of variation and abrupt change points of annual runoff in the *** study would be beneficial for water resource management in developing adaptation strategies to offset the negative impact of climate change in HRC.

关键词： Precipitation-runoff system Mann-Kendall test Abrupt change Regional response Semi-arid area

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Abrupt change of winter temperature over the Mongolian Plateau during 1961-2017

引用

Journal of Mountain Science 2023年第4期20卷 996-1009页

作者： xia ying-ying CHUN Xi DAN Dan LIU Hong-yu ZHOU Hai-jun WAN Zhi-qiang Inner Mongolia Restoration Engineering Laboratory of Wetland Eco-environment System Inner Mongolia Normal UniversityHohhot010022China Key Laboratory of Mongolian Plateau’s Climate System Inner Mongolia Normal UniversityHohhot010022China College of Geographical Science Inner Mongolia Normal UniversityHohhot010022China College of Resources and Environment Baotou Teachers’CollegeBaotou014030China

Studying the abrupt change of winter temperature(ACWT)over the Mongolian Plateau(MP,including Inner Mongolia Autonomous Region and State of Mongolia)is of great significance for understanding the spatiotemporal distribution of temperature and the mechanism of global climate *** temperature data during 1961–2017was collected,and the abrupt change point was determined by the Mann–Kendall test and sliding ttest,to analyze the characteristics and causes of *** results showed that(a)The winter temperature has rapidly increased with a trend of 0.41℃/10a,which was significantly higher than that of the rest area of Chinese mainland,indicating that climate change in the MP was more sensitive to global warming.(b)The abrupt change point occurred in 1988,with temperature of-15.5℃and-14.1℃before and after abrupt change,*** ACWT in 50°N was 1–3 years later than that in 40°N,and the isotherms of different temperatures moved northward by 10–200 km,especially-16℃isotherms moved approximately 200 km northward after 1988.(c)The Arctic Oscillation(AO)and Mongolian High(MH)anomaly affects winter temperature over the *** the AO is unusually strong,the MH and East Asian winter monsoon are weak,and southerly winds prevail in most regions,which is not conducive to the cold air developing southward,leading to higher winter temperature in the ***,abnormally northerly winds prevail and temperature is ***,the abrupt change time of AO occurred in 1987 before winter *** shows that the AO indirectly causes winter temperatures to rise by influencing the MH and is also the main driving factor of ACWT.

关键词： Abrupt temperature change Spatiotemporal distribution Arctic Oscillation Winter temperature Mongolian Plateau

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Evaluation of neuro-intensive care unit performance in China： predicting outcomes of Simplified Acute Physiology Score II or Glasgow Coma Scale

引用

Chinese Medical Journal 2013年第6期126卷 1132-1137页

作者： ZHAO xiao-xia SU ying-ying WANG Miao ZHANG Yan YE Hong FENG Huan-huan ZHANG Yun-zhou GAO Dai-quan CHEN Wei-bi Department of Neurocritical Care Unit Xuanwu Hospital Capital Medical University Beijing 100053 China

Background Severity scoring systems are useful tools for measuring the severity of the disease and its outcome. This pilot study was to verify and compare the prognostic performance of the Simplified Acute Physiology Score II （SAPS II） and Glasgow Coma Scale （GCS） in neuro-intensive care unit （N-ICU） patients. Methods A total of 1684 patients consecutively admitted to the N-ICU at Xuanwu Hospital between January 1, 2005 and December 31, 2011 were enrolled in this study. The data-base included admission data, at 24-, 48-, and 72-hour SAPS II and GCS. Repeated measure data analysis of variance, Logistic regression analysis, the Hosmer-Lemeshow goodness-of-fit statistic, and the area under the receiver operating characteristic were used to evaluate the performance. Results There was a significant difference between the SAPS II or GCS score at four time points （F=16.110, P=0.000 or F=8.108, P=0.000）. The SAPS II scores or GCS score at four time points interacted with the outcomes with significant difference （F=116.771, P=0.000 or F=65.316, P=0.000）. Calibration of the SAPS II or GCS score at each time point on all patients was good. The percentage of a risk estimate prediction corresponding to observed mortality was also good. The 72-hour score have the greatest consistency. Discriminations of the SAPS II or GCS score at each time were all satisfactory. The 72-hour score had the greatest discriminative power. The cut-off value was 33 （sensitivity of 85.2% and specificity of 74.3%） and 6 （sensitivity of 70.6% and specificity of 65.0%）. The SAPS II at each time point on all patients showed better calibration, consistency and discrimination than GCS. The binary Logistic regression analysis identified physiological variables, GCS, age, and disease category as significant independent risk factors of death. After the two variables including underlying disease and type of admission were excluded, we built the simplified SAPS II model. A correlation was suggested between the si

关键词： Simplified Acute Physiology Score II Glasgow Coma Scale neuro-intensive care unit repeated measure data analysis calibration discriminations

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Chondroitinase ABC combined with Schwann cell transplantation enhances restoration of neural connection and functional recovery following acute and chronic spinal cord injury

引用

Neural Regeneration Research 2025年第5期20卷 1467-1482页

作者： Wenrui Qu xiangbing Wu Wei Wu ying Wang Yan Sun Lingxiao Deng Melissa Walker Chen Chen Heqiao Dai Qi Han ying Ding Yongzhi xia George Smith Rui Li Nai-Kui Liu xiao-Ming Xu Spinal Cord and Brain Injury Research Group Stark Neurosciences Research InstituteDepartment of Neurological SurgeryIndiana University School of MedicineIndianapolisINUSA Department of Hand Surgery the Second Hospital of Jilin UniversityChangchunJilin ProvinceChina Shriners Hospitals Pediatric Research Center Temple University School of MedicinePhiladelphiaPAUSA Department of Anatomy&Cell Biology Indiana University School of MedicineIndianapolisINUSA

Schwann cell transplantation is considered one of the most promising cell-based therapy to repair injured spinal cord due to its unique growth-promoting and myelin-forming properties.A the Food and Drug Administration-approved Phase I clinical trial has been conducted to evaluate the safety of transplanted human autologous Schwann cells to treat patients with spinal cord injury.A major challenge for Schwann cell transplantation is that grafted Schwann cells are confined within the lesion cavity,and they do not migrate into the host environment due to the inhibitory barrier formed by injury-induced glial scar,thus limiting axonal reentry into the host spinal *** we introduce a combinatorial strategy by suppressing the inhibitory extracellular environment with injection of lentivirus-mediated transfection of chondroitinase ABC gene at the rostral and caudal borders of the lesion site and simultaneously leveraging the repair capacity of transplanted Schwann cells in adult rats following a mid-thoracic contusive spinal cord *** report that when the glial scar was degraded by chondroitinase ABC at the rostral and caudal lesion borders,Schwann cells migrated for considerable distances in both rostral and caudal *** Schwann cell migration led to enhanced axonal regrowth,including the serotonergic and dopaminergic axons originating from supraspinal regions,and promoted recovery of locomotor and urinary bladder ***,the Schwann cell survival and axonal regrowth persisted up to 6 months after the injury,even when treatment was delayed for 3 months to mimic chronic spinal cord *** findings collectively show promising evidence for a combinatorial strategy with chondroitinase ABC and Schwann cells in promoting remodeling and recovery of function following spinal cord injury.

关键词： axonal regrowth bladder function chondroitinase ABC functional recovery glial scar lentivirus migration Schwann cell spinal cord injury transplantation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

基于循环追踪的船舶圆形编队控制

引用

厦门大学学报（自然科学版） 2015年第1期54卷 93-98页

作者：夏盈盈孙洪飞厦门大学信息科学与技术学院福建厦门361005

针对欠驱动船舶之间的协同合作问题,对船舶的圆形编队控制进行了研究.采用坐标变换,得到新的船舶圆形编队控制的运动学模型.基于这种模型,运用循环追踪控制策略,得到船舶圆形编队的虚拟控制输入量.由于采用循环追踪控制,故每艘船只需了... 详细信息

针对欠驱动船舶之间的协同合作问题,对船舶的圆形编队控制进行了研究.采用坐标变换,得到新的船舶圆形编队控制的运动学模型.基于这种模型,运用循环追踪控制策略,得到船舶圆形编队的虚拟控制输入量.由于采用循环追踪控制,故每艘船只需了解所追踪的前一艘船的信息,而不需要知道其他船舶的信息就可以得到期望的整体队形要求,因此是所需通信数较少的方法之一.考虑船舶欠驱动的特点,将虚拟输入量与反步控制算法相结合,得到船舶圆形编队的实际控制输入.最后通过数值仿真,验证了该编队控制策略的有效性,实现了预期的编队控制目标.

关键词：欠驱动船舶圆形编队循环追踪反步法

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

HPLC测定复方硫酸新霉素口腔溃疡药膜中克霉唑的含量

引用

华西药学杂志 2006年第3期21卷 290-291页

作者：王琼芬夏瑛瑛浙江省舟山市药品检验所浙江定海316000

目的建立测定复方硫酸新霉素口腔溃疡药膜中克霉唑含量的方法。方法采用HPLC法。色谱柱为Agilent ZORBAX SB-C18柱（150mm×4．6mm，5μm）；流动相为甲醇-0．025mol·L^-1磷酸氢二钾溶液（75：25）；检测波长225nm；流速1．0ml·min^-... 详细信息

目的建立测定复方硫酸新霉素口腔溃疡药膜中克霉唑含量的方法。方法采用HPLC法。色谱柱为Agilent ZORBAX SB-C18柱（150mm×4．6mm，5μm）；流动相为甲醇-0．025mol·L^-1磷酸氢二钾溶液（75：25）；检测波长225nm；流速1．0ml·min^-1。结果克霉唑在25～200μg·ml^-1范围内，峰面积与浓度呈良好的线性关系（r=0．9999），平均回收率为100．8％，RSD=0．86％（n=6）。结论方法简便、灵敏、准确。

关键词：复方硫酸新霉素口腔溃疡药膜克霉唑高效液相色谱法含量测定

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

宏基因组测序法对林可霉素利多卡因凝胶中污染细菌的鉴定与溯源研究

引用

药物分析杂志 2024年第8期44卷 1407-1414页

作者：严卓彦谭宇翔夏瑛瑛舟山市食品药品检验检测研究院国家海洋食品质量检验检测中心舟山316012 中国科学院深圳先进技术研究院深圳合成生物学创新研究院中国科学院定量工程生物学重点实验室深圳518055

目的:评价宏基因组测序法在药品污染细菌鉴定和溯源中的应用。方法:分别通过培养法、扩增子测序法和宏基因组测序法,对2批微生物限度控制菌检查中检出未知微生物的林可霉素利多卡因凝胶药剂进行菌种鉴定和溯源。培养法分离得到的细菌,... 详细信息

目的:评价宏基因组测序法在药品污染细菌鉴定和溯源中的应用。方法:分别通过培养法、扩增子测序法和宏基因组测序法,对2批微生物限度控制菌检查中检出未知微生物的林可霉素利多卡因凝胶药剂进行菌种鉴定和溯源。培养法分离得到的细菌,通过革兰氏染色、生化反应、生物质谱法、16srDNA测序及芽孢杆菌特异性PCR方法进行菌种鉴定,并通过多位点序列分型(MLST)法对药品和环境中均检出的蜡样芽孢杆菌进行菌株分型。宏基因组测序结果通过MetaPhlan软件进行菌株水平的分析。结果:MLST与Meta⁃Phlan结果均显示药品与检测环境中存在同一组蜡样芽孢杆菌,显示药品中的蜡样芽孢杆菌极有可能来自检测环境的污染。培养法与宏基因组测序法均在药品中检出污染微生物土壤短芽孢杆菌、类芽孢杆菌及新芽孢杆菌,但扩增子测序还在环境样本中检出上述细菌,因此不能排除药品中此类污染菌来自检测环境的可能性。结论:宏基因组测序技术相比培养法,能够更全面发现具有潜在风险的微生物,同时也能准确地进行菌株水平的溯源分析,在药品污染菌鉴定与溯源中具有重要的应用价值。

关键词：宏基因组测序扩增子测序多位点序列分型 MetaPhlan分析药品污染菌的鉴定与溯源

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

白芍甘草配伍中不同成分群的溶出关系及识别研究

引用

中国中药杂志 2006年第21期31卷 1776-1780页

作者：邹华彬杜爱琴夏瑛瑛袁久荣山东大学化学化工学院(东校区) 山东济南250100 山东中医药大学药学院山东济南250014

目的:研究中药中不同极性区间成分的溶出关系及不同成分群的识别。方法:用不同极性溶剂依次提取不同配伍的白芍、甘草,分析了提取物的紫外指纹图谱吸收峰的绝对及相对吸光度值。结果:不同成分群之间的溶出关系不同,有些成分群之间存在... 详细信息

目的:研究中药中不同极性区间成分的溶出关系及不同成分群的识别。方法:用不同极性溶剂依次提取不同配伍的白芍、甘草,分析了提取物的紫外指纹图谱吸收峰的绝对及相对吸光度值。结果:不同成分群之间的溶出关系不同,有些成分群之间存在协同溶出关系。通过这些关系可以识别提取物中不同的成分群。结论:中药中不同成分群的溶出过程不同。

关键词：中药配伍成分群协同溶出识别溶出动力学

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

基于集合卡尔曼滤波的渤海水位低频波动数值模拟

引用

海洋与湖沼 2024年第5期55卷 1070-1081页

作者：李相豪夏颖颖宋德海中国海洋大学物理海洋教育部重点实验室山东青岛266100 中国海洋大学海洋与大气学院山东青岛266100 国家海洋信息中心天津300171

风松弛导致亚潮尺度的水位低频波动是渤黄海秋冬季常见的海洋动力过程,这一过程的数值模拟要求模型空间范围要覆盖整个渤黄海区域甚至是整个东部陆架海区域。对于以渤海海峡为开边界的渤海模型,则由于风区过小无法再现这一过程。针对这... 详细信息

风松弛导致亚潮尺度的水位低频波动是渤黄海秋冬季常见的海洋动力过程,这一过程的数值模拟要求模型空间范围要覆盖整个渤黄海区域甚至是整个东部陆架海区域。对于以渤海海峡为开边界的渤海模型,则由于风区过小无法再现这一过程。针对这一问题,本文在渤海模型上使用集合卡尔曼滤波(ensemble Kalman filter,ENKF)进行同化,成功再现了这一现象,并进一步分析了ENKF同化的作用及其影响因素。主要结论如下:渤海的水位低频波动与输入渤海的开边界水位有关,仅使用潮汐数据和风场数据无法准确地模拟出渤海水位的变化,然而通过ENKF同化则可以再现渤海内的水位低频波动,且同化效果优于两类不同开边界输入的结果。ENKF同化的准确性与集合数目以及观测数据采样位置有关。集合数目越多同化效果越强,但超过40个集合后,同化效果改善不明显。使用的观测数据应尽量均匀分布且要远离开边界。

关键词：低频波动数据同化集合卡尔曼滤波渤海开边界

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：