检索结果-南通市图书馆

Journal of Geographical Sciences 2025年第1期 112-138页

作者： chen Junxu WANG Yuan ZHAO Zhifang FAN Yunjiang LUO Xiaochuan YI Lu feng Siqi YANG liang Emlyn Yunnan Key Laboratory of Soil Erosion Prevention and Green Development Yunnan University International Joint Research Center for Karstology Yunnan University School of Engineering Westlake University Department of Geography Ludwig Maximilian University of Munich (LMU)

Due to water conflicts and allocation in the Lancang-Mekong River Basin(LMRB), the spatio-temporal differentiation of total water resources and the natural-human influence need to be clarified. This work investigated LMRB's terrestrial water storage anomaly(TWSA) and its spatio-temporal dynamics during 2002–2020. Considering the effects of natural factors and human activities, the respective contributions of climate variability and human activities to terrestrial water storage change(TWSC) were separated. Results showed that:(1) LMRB's TWSA decreased by 0.3158 cm/a.(2) TWSA showed a gradual increase in distribution from southwest of MRB to middle LMRB and from northeast of LRB to middle LMRB. TWSA positively changed in Myanmar while slightly changed in Laos and China. It negatively changed in Vietnam, Thailand and Cambodia.(3) TWSA components decreased in a descending order of soil moisture, groundwater and precipitation.(4) Natural factors had a substantial and spatial differentiated influence on TWSA over the LMRB.(5) Climate variability contributed 79% of TWSC in the LMRB while human activities contributed 21% with an increasing impact after 2008. The TWSC of upstream basin countries was found to be controlled by climate variability while Vietnam and Cambodia's TWSC has been controlled by human activities since 2012.

关键词：

Recent Advances in Fibrous Materials for Hydroelectricity Generation

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Nano-Micro Letters 2025年第2期17卷 109-133页

作者： Can Ge Duo Xu Xiao feng Xing Yang Zheheng Song Yuhang Song Jingyu chen Yingcun Liu Chong Gao Yong Du Zhe Sun Weilin Xu Jian Fang College of Textile and Clothing Engineering Soochow UniversitySuzhou 215123People’s Republic of China National Engineering Laboratory for Modern Silk Soochow UniversitySuzhou 215123People’s Republic of China State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile UniversityWuhan 430200People’s Republic of China Institute of Functional Nano&Soft Materials(FUNSOM) Soochow UniversitySuzhou 215123People’s Republic of China Department of Electrical and Computer Engineering University of MassachusettsAmherstMA 01003USA Department of Materials Imperial College LondonSouth Kensington CampusLondon SW72AZUK College of Textile Science and Engineering Zhejiang Sci-Tech UniversityHangzhou 310018People’s Republic of China School of Materials Science and Engineering Shanghai Institute of Technology100 Haiquan RoadShanghai 201418People’s Republic of China

Depleting fossil energy sources and conventional polluting power generation pose a threat to sustainable *** generation from ubiquitous and spontaneous phase transitions between liquid and gaseous water has been considered a promising strategy for mitigating the energy *** materials with unique flexibility,processability,multifunctionality,and practicability have been widely applied for fibrous materials-based hydroelectricity generation(FHG).In this review,the power generation mechanisms,design principles,and electricity enhancement factors of FHG are first ***,the fabrication strategies and characteristics of varied constructions including 1D fiber,1D yarn,2D fabric,2D membrane,3D fibrous framework,and 3D fibrous gel are ***,the advanced functions of FHG during water harvesting,proton dissociation,ion separation,and charge accumulation processes are analyzed in ***,the potential applications including power supply,energy storage,electrical sensor,and information expression are also ***,some existing challenges are considered and prospects for future development are sincerely proposed.

关键词： Hydroelectricity Fibrous material Streaming potential Ion diffusion

碳酸二甲酯与苯胺合成苯氨基甲酸甲酯催化研究

在线全文

学校读者我要写书评

暂无评论

应用化工 2016年第11期45卷 2088-2090,2094页

作者：戈军伟陈梁锋李亚男李骏何文军上海石油化工研究院绿色化工与工业催化国家重点实验室上海201208

以碳酸二甲酯(DMC)和苯胺为原料,在锌基催化剂作用下直接生成苯氨基甲酸甲酯(MPC)。筛选了一系列无机、有机锌化合物,发现醋酸锌是合成MPC的高效催化剂。以醋酸锌为催化剂,考察了原料摩尔比、反应时间、反应温度等对反应的影响。结果表... 详细信息

以碳酸二甲酯(DMC)和苯胺为原料,在锌基催化剂作用下直接生成苯氨基甲酸甲酯(MPC)。筛选了一系列无机、有机锌化合物,发现醋酸锌是合成MPC的高效催化剂。以醋酸锌为催化剂,考察了原料摩尔比、反应时间、反应温度等对反应的影响。结果表明,在DMC与苯胺摩尔比9,反应温度170℃,反应时间2 h时,苯胺的转化率达到99%,MPC选择性大于90%,催化体系具有较好的工业应用前景。

关键词：苯氨基甲酸甲酯苯胺碳酸二甲酯醋酸锌

尼妥珠单抗联合GS化疗治疗晚期胰腺癌患者临床研究

在线全文

学校读者我要写书评

暂无评论

中国合理用药探索 2019年第10期16卷 29-31页

作者：毛雨秋陈良峰韩菲菲信阳市中心医院肿瘤内一科河南信阳464000

目的:探讨尼妥珠单抗联合GS化疗方案治疗晚期胰腺癌患者的临床疗效。方法:选取2015年1月—2017年2月我院收治的61例晚期胰腺癌患者,按随机数字表法分为对照组(n=30)和试验组(n=31)。对照组予以GS化疗方案(吉西他滨+替吉奥),试验组在对... 详细信息

目的:探讨尼妥珠单抗联合GS化疗方案治疗晚期胰腺癌患者的临床疗效。方法:选取2015年1月—2017年2月我院收治的61例晚期胰腺癌患者,按随机数字表法分为对照组(n=30)和试验组(n=31)。对照组予以GS化疗方案(吉西他滨+替吉奥),试验组在对照组基础上予以尼妥珠单抗治疗。比较两组疾病控制率、不良反应,并于治疗后3个月、6个月、12个月随访两组生存情况。结果:试验组疾病控制率高于对照组,差异有统计学意义(P0.05);试验组治疗后12个月生存率高于对照组,差异有统计学意义(P<0.05)。结论:采用GS化疗方案联合尼妥珠单抗治疗晚期胰腺癌,可提高患者生存率及疾病控制率,且具有较高安全性。

关键词：晚期胰腺癌尼妥珠单抗 GS化疗方案吉西他滨替吉奥

在线全文

学校读者我要写书评

暂无评论

人工基质在对虾养殖中的应用

海洋科学 2016年第9期40卷 135-139页

作者：张家松陈亮亮冯震华段亚飞董宏标李华刘青松中国水产科学研究院南海水产研究所农业部南海渔业资源开发利用重点实验室广东广州510300 上海海洋大学水产与生命学院上海201306

目前中国对虾养殖业快速发展,同时也伴随近海养殖水体日益恶化、抗生素和化学药物被滥用和水产品食品安全等一系列问题。这些问题严重制约着对虾集约化养殖的可持续发展,因此选择一种更加健康、绿色和安全的养殖模式显得尤为重要。作者... 详细信息

目前中国对虾养殖业快速发展,同时也伴随近海养殖水体日益恶化、抗生素和化学药物被滥用和水产品食品安全等一系列问题。这些问题严重制约着对虾集约化养殖的可持续发展,因此选择一种更加健康、绿色和安全的养殖模式显得尤为重要。作者通过介绍人工基质这种新型水处理技术表面生物膜的结构和形成过程,探讨了其功能性(水质调节、饲料补充和病害防治)机理,对其在对虾养殖业中的实际应用做了展望。

关键词：对虾人工基质生物膜机理

航天搭载后福橘(Citrus reticulata Blanco)茎尖无性系有丝分裂行为和细胞超微结构的变化

在线全文

学校读者我要写书评

暂无评论

核农学报 2011年第2期25卷 259-265,297页

作者：吴如健黄镜浩温寿星蔡子坚罗土炎陈良锋王周文福建省农科院果树研究所福建福州350013 福建省农科院中心实验室福建福州350003 闽侯县鸿尾乡政府福建福州350106 闽侯县科技局福建福州350100

福橘(Citrus reticulata Blanco)茎尖经‘实践八号’育种卫星搭载后,经组织培养获得其再生植株,以此为材料,结合常规压片法与超薄切片技术,研究航天搭载对福橘当代无性系细胞有丝分裂行为及细胞超微结构的影响。结果表明:航天搭载对福... 详细信息

福橘(Citrus reticulata Blanco)茎尖经‘实践八号’育种卫星搭载后,经组织培养获得其再生植株,以此为材料,结合常规压片法与超薄切片技术,研究航天搭载对福橘当代无性系细胞有丝分裂行为及细胞超微结构的影响。结果表明:航天搭载对福橘茎尖具有诱变作用,所得13个诱变无性系中,有丝分裂过程存在不同程度的异常,其中‘08004’无性系植株的有丝分裂畸变率明显高于其他无性系:中期染色体数目异常畸变率为0.34%,落后染色体畸变率为0.69%,微核畸变率为0.86%;并且有丝分裂过程中纺锤体结构发生异常,可见C-形(0.17%)或S-形纺锤体(1.20%),细胞发生多极分裂(1.03%)。绝大多数航天搭载当代无性系的细胞超微结构正常。‘08004’无性系植株叶肉细胞超微结构呈现细胞程序性死亡(PCD)典型特征:细胞核内染色质凝集;叶绿体类囊体结构解体;出现自体吞噬小体;细胞液泡化并发生质壁分离,最终形成凋亡小体。PCD过程中,线粒体保持其结构完整性,直至PCD末期才发生结构变化。

关键词：航天育种福橘有丝分裂纺锤体超微结构染色质凝集自体吞噬小体细胞程序性死亡

在线全文

学校读者我要写书评

暂无评论

湖南现代农业发展对策研究

湖南农业科学 2010年第1期 152-154页

作者：黄大金陈良凤陈烈臣刘正清湖南农业大学湖南长沙410128 湖南省农学会湖南长沙410125

提出了湖南现代农业战略定位是"一个基地,三个中心":即国家粮仓基地,主要农产品生产与加工中心,农业物流中心,科技创新中心。并就重点支持优势农产品产业开发,着力打造湖南现代农业产业体系;创新体制机制,形成推进湖南现代农业发展的强... 详细信息

提出了湖南现代农业战略定位是"一个基地,三个中心":即国家粮仓基地,主要农产品生产与加工中心,农业物流中心,科技创新中心。并就重点支持优势农产品产业开发,着力打造湖南现代农业产业体系;创新体制机制,形成推进湖南现代农业发展的强大合力等方面进行了系统论述。

关键词：现代农业产业战略定位湖南

A data and physical model dual-driven based trajectory estimator for long-term navigation

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

Defence Technology（防务技术） 2024年第10期40卷 78-90页

作者： Tao feng Yu Liu Yue Yu liang chen Ruizhi chen School of Communications and Information Engineering Chongqing University of Posts and TelecommunicationsChongqing400065China Department of Land Surveying and Geo-Informatics The Hong Kong Polytechnic UniversityHong Kong999077China Chongqing Key Laboratory of Autonomous Navigation and Microsystem Chongqing University of Post and TelecommunicationsChongqing400065China State Key Laboratory of Information Engineering in Surveying Mapping and Remote Sensing(LIESMARS)Wuhan UniversityWuhan430000China

Long-term navigation ability based on consumer-level wearable inertial sensors plays an essential role towards various emerging fields, for instance, smart healthcare, emergency rescue, soldier positioning et al. The performance of existing long-term navigation algorithm is limited by the cumulative error of inertial sensors, disturbed local magnetic field, and complex motion modes of the pedestrian. This paper develops a robust data and physical model dual-driven based trajectory estimation(DPDD-TE) framework, which can be applied for long-term navigation tasks. A Bi-directional Long Short-Term Memory(Bi-LSTM) based quasi-static magnetic field(QSMF) detection algorithm is developed for extracting useful magnetic observation for heading calibration, and another Bi-LSTM is adopted for walking speed estimation by considering hybrid human motion information under a specific time period. In addition, a data and physical model dual-driven based multi-source fusion model is proposed to integrate basic INS mechanization and multi-level constraint and observations for maintaining accuracy under long-term navigation tasks, and enhanced by the magnetic and trajectory features assisted loop detection algorithm. Real-world experiments indicate that the proposed DPDD-TE outperforms than existing algorithms, and final estimated heading and positioning accuracy indexes reaches 5° and less than 2 m under the time period of 30 min, respectively.

关键词： Long-term navigation Wearable inertial sensors Bi-LSTM QSMF Data and physical model dual-driven

Role of the Greenland Sea ice anomaly in the late-spring drought over Northwest China

在线全文

学校读者我要写书评

暂无评论

Atmospheric and Oceanic Science Letters 2025年第1期18卷 1-5页

作者： Yang Liu Huopo chen Nansen-Zhu International Research Centre Institute of Atmospheric Physics Chinese Academy of SciencesBeijingChina Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters Nanjing University for Information Science and TechnologyNanjingChina

Drought across Northwest China in late spring has exerted a vital effect on the local climate and agricultural production,and has been alleviated during the past *** study explored the influence of the preceding Arctic sea ice on the May drought in Northwest China caused by the precipitation *** analysis indicated that when the Greenland Sea ice concentration is abnormally high during February to April,the dry conditions in Northwest China tend to be *** increase of sea ice in the Greenland Sea can excite a meridional circulation,which causes sea surface temperature(SST)anomalies in the North Atlantic via the sea-air interaction,manifested as significant warm SST anomalies over the south of Greenland and the subtropical North Atlantic,but negative SST anomalies over the west of the *** abnormal SST pattern maintains to May and triggers a zonal wave train from the North Atlantic through Scandinavia and Central Asia to Northwest China,leading to abnormal cyclones in Northwest ***,Northwest China experiences a more humid climate than usual.

关键词： Arctic sea ice Greenland Sea North Atlantic SST Drought Northwest China

Cell polarization in ischemic stroke: molecular mechanisms and advances

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第3期20卷 632-645页

作者： Yuanwei Li Xiaoxiao Xu Xuan Wu Jiarui Li Shiling chen Danyang chen Gaigai Li Zhouping Tang Department of Neurology Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhanHubei ProvinceChina

Ischemic stroke is a cerebrovascular disease associated with high mortality and disability rates. Since the inflammation and immune response play a central role in driving ischemic damage, it becomes essential to modulate excessive inflammatory reactions to promote cell survival and facilitate tissue repair around the injury site. Various cell types are involved in the inflammatory response, including microglia, astrocytes, and neutrophils, each exhibiting distinct phenotypic profiles upon stimulation. They display either proinflammatory or anti-inflammatory states, a phenomenon known as ‘cell polarization.’ There are two cell polarization therapy strategies. The first involves inducing cells into a neuroprotective phenotype in vitro, then reintroducing them autologously. The second approach utilizes small molecular substances to directly affect cells in vivo. In this review, we elucidate the polarization dynamics of the three reactive cell populations(microglia, astrocytes, and neutrophils) in the context of ischemic stroke, and provide a comprehensive summary of the molecular mechanisms involved in their phenotypic switching. By unraveling the complexity of cell polarization, we hope to offer insights for future research on neuroinflammation and novel therapeutic strategies for ischemic stroke.

关键词： astrocyte polarization immune regulation inflammation ischemic injury microglia polarization neutrophil polarization signaling pathways stroke