检索结果-南通市图书馆

Comparative Assessment of Impacts of Future Climate Change on Runoff in Upper Daqinghe Basin,China

Chinese Geographical Science 2024年第3期34卷 564-578页

作者： INGABIRE Romaine CHANG yuru LIU Xia CAO Bo UMUGWANEZA Adeline SHEN Yanjun Key Laboratory of Agricultural Water Resources Hebei-Key Laboratory of Water Saving AgricultureCenter for Agricultural Re-sources ResearchInstitute of Genetics and Developmental BiologyChinese Academy of SciencesShijiazhuang 050022China Uni-versity of Chinese Academy of Sciences Beijing 100049China State Key Laboratory of Desert and Oasis Ecology Xinjiang Insti-tute of Ecology and GeographyChinese Academy of SciencesUrumqi 830011China

Assessing runoff changes is of great importance especially its responses to the projected future climate change on local scale basins because such analyses are generally done on global and regional scales which may lead to generalized conclusions rather than specific *** change affected the runoff variation in the past in the upper Daqinghe Basin,however,the climate was mainly considered uncertain and still needs further studies,especially its future impacts on runoff for better water resources management and *** with a set of climate simulations,a daily conceptual hydrological model(MIKE11-NAM)was applied to assess the impact of climate change on runoff conditions in the Daomaguan,Fuping and Zijingguan basins in the upper Daqinghe *** hydrological data(2008–2017)were used to evaluate the applicability of the MIKE11-NAM *** bias correction,future projected climate change and its impacts on runoff(2025–2054)were analysed and compared to the baseline period(1985–2014)under three shared social economic pathways(SSP1-2.6,SSP2-4.5,and SSP5-8.5)scenarios from Coupled Model Intercomparison Project Phase 6(CMIP6)*** MIKE-11 NAM model was applicable in all three Basins,with both R^(2)and Nash-Sutcliffe Efficiency coefficients greater than 0.6 at daily scale for both calibration(2009–2011)and validation(2012–2017)periods,*** uncertainties remain,temperature and precipitation are projected to increase compared to the baseline where higher increases in precipitation and temperature are projected to occur under SSP2-4.5 and SSP5-8.5 scenarios,respectively in all the *** changes will range between 12%–19%whereas temperature change will be 2.0℃–2.5℃ under the SSP2-4.5 and SSP5-8.5 scenarios,*** addition,higher warming is projected to occur in colder months than in warmer ***,the runoff of these three basins is projected to respond to projected climate changes differe

关键词： runoff climate change MIKE11-NAM model Coupled Model Intercomparison Project Phase 6(CMIP6) upper Daqinghe Basin,China

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

短视频过度使用及注意力不集中与初中生拒学行为的关系

引用

中国心理卫生杂志 2025年第1期39卷 49-56页

作者：李幼东王建强王紫妍刘久楹吕晶葛怡然杜玉茹河北医科大学第一医院临床心理科石家庄050000 河北省脑科学与精神心理疾病重点实验室石家庄050000

目的:探讨初中生短视频过度使用、注意力不集中与拒学行为的显要表现及内在关联。方法:选取1 106名在校初中生进行调查,采用短视频APP过度使用量表、注意力缺陷多动障碍评定量表的注意力不集中维度、拒绝上学行为问卷评估短视频过度使... 详细信息

目的:探讨初中生短视频过度使用、注意力不集中与拒学行为的显要表现及内在关联。方法:选取1 106名在校初中生进行调查,采用短视频APP过度使用量表、注意力缺陷多动障碍评定量表的注意力不集中维度、拒绝上学行为问卷评估短视频过度使用程度、注意力不集中、拒学行为。采用R语言网络分析工具包评估单个网络的核心节点和共存网络的桥梁节点,比较不同性别和年级的网络结构差异。结果:短视频过度使用、注意力不集中、拒学行为网络的核心节点分别为“使用短视频会增强与他人的联系”(预期影响值=1.03)、“容易分心”(预期影响值=1.99)、“学校疏离”(预期影响值=0.83)。共存网络的桥梁节点为“违抗行为”(桥预期影响值=0.69)、“难以从事持续性的脑力活动”(桥预期影响值=0.47)。网络结构差异分析发现,初一、初二、初三学生共存网络的核心节点分别为“因使用短视频而停止做其他事”“违抗行为”“学习能力”。结论:初中生短视频过度使用、注意力不集中、拒学行为的显要表现分别为使用短视频会增强与他人的联系、容易分心、学校疏离;三者共存时最重要的影响因素为违抗行为、难以从事持续性的脑力活动。

关键词：短视频过度使用注意力不集中拒绝上学行为初中生网络分析

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Comparing containment measures among nations by epidemiological effects of COVID-19

引用

National Science Review 2020年第12期7卷 1847-1851页

作者： jia Gu Han Yan Yaxuan Huang yuru Zhu Haoxuan Sun Yumou Qiu Songxi Chen Center for Statistical Science Peking University Guanghua School of Management Peking University School of Mathematical Sciences Sichuan University Yuanpei College Peking University Center for Data Science Peking University Department of Statistics Iowa State University

The coronavirus disease 2019 (COVID-19) has evolved to a global pandemic since its inception in December *** have responded to the epidemics with different levels of responses and containment *** the unprecedented pressure on nations’healthcare systems and the deaths so far,there is an urgent need to evaluate the effects of the containment measures,which would be useful for countries to plan for their responses to counter the first or possibly the second wave of the epidemic.

关键词：

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Role of nutrition in diabetes mellitus and infections

引用

World Journal of Clinical Cases 2025年第3期13卷 1-8页

作者： Xue-Lu Yu Li-Yun Zhou Xiao Huang Xin-Yue Li Ming-Ke Wang ji-Shun Yang Naval Medical Center of PLA Naval Medical UniversityShanghai 200052China

In this editorial,we have commented on the article that has been published in the recent issue of World Journal of Clinical *** authors have described a case of unilateral thyroid cyst and have opined that the acute onset of infection may be linked to diabetes mellitus(DM).We have focused on the role of nutrition in the association between DM and *** with DM are at a high risk of infection,which could also be attributed to nutrition-related *** interventions for patients with diabetes are mainly based on a low-calorie diet,which can be achieved by adhering to a low-carbohydrate ***,dietary fiber supplementation is recommended to maintain the diversity of the gut ***,high-quality protein can prevent the increased risk of infection due to *** of vitamins C,vitamins A,vitamins D,and folic acid improves blood sugar control and facilitates immune *** deficiencies augment the risk of infection,but the relationship with diabetes is mostly U-shaped and a good intake should be maintained.

关键词： Diabetes mellitus Infection Macronutrients Vitamins Minerals

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Simple decision-making model for orchard air-assisted spraying airflow

引用

International Journal of Agricultural and Biological Engineering 2023年第2期16卷 23-29页

作者： Xiang Wang yuru Feng Wei Fu jiangtao Qi jianli Song Center for Chemicals Application Technology(CCAT) College of ScienceChina Agricultural UniversityBeijing 100193China College of Mechanical and Electrical Engineering Hainan UniversityHaikou 570100China College of Biological and Agricultural Engineering Jilin UniversityChangchun 130022China

Airflow speed is one of the three factors of air-assisted *** the matching model between airflow speed and target canopy characteristics is an effective way to improve the orchard precision spraying technology,as airflow can significantly affect droplet deposition and drift loss.A simple model of airflow speed was established in this ***,air-assisted spraying experiments were carried out on a standard simulation canopy to study the airflow speed depended on canopy width,leaf area index,and porosity ***,determined by Ribbon Method and verified by droplet drift data,the airflow speed through the canopy was between 0.5 m/s and 0.7 m/***,multiple tests were carried out under standard simulation canopy with different characteristics,and the airflow speed model was established ultimately:with a fixed leaf area index(LAI),the relationship between canopy upwind boundary airflow speed and canopy width satisfied the exponential model(y=ae^(bx)),and the coefficients a and b are well related to the density of branches and leaves in the *** LAI=3.456,y=2.036e^(1.5887x),R^(2)=0.994;LAI=1.728,y=1.639e^(1.445x),R^(2)=*** growers can acquire needed airflow speed through this simple model,it is quick and precise and appropriate to most growth periods of a variety of fruit trees,such as apples,pears,and vines.

关键词： airflow speed canopy width porosity rate LAI air-assisted spraying

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

芍药苷对血管紧张素Ⅱ诱导心肌成纤维细胞纤维化的保护作用

引用

中国组织工程研究 2025年第25期29卷 5382-5389页

作者：纪雅琼宁忠平上海中医药大学上海市201203 上海健康医学院附属周浦医院心血管内科上海市201318

背景:研究表明芍药苷对肝、肾等器官纤维化具有改善作用,尤其是在肝纤维化中表现出突出优势,但芍药苷对于血管紧张素Ⅱ诱导的心肌纤维化的保护作用尚不明确。目的:探讨芍药苷对血管紧张素Ⅱ诱导的心肌成纤维细胞的保护作用及分子机制。... 详细信息

背景:研究表明芍药苷对肝、肾等器官纤维化具有改善作用,尤其是在肝纤维化中表现出突出优势,但芍药苷对于血管紧张素Ⅱ诱导的心肌纤维化的保护作用尚不明确。目的:探讨芍药苷对血管紧张素Ⅱ诱导的心肌成纤维细胞的保护作用及分子机制。方法:在分离培养的SD大鼠乳鼠心肌成纤维细胞中加入血管紧张素Ⅱ(1μmol/L)干预48 h作为模型组;芍药苷低、高剂量组给予不同剂量的芍药苷(50,100μmol/L)预处理2 h,再用血管紧张素Ⅱ处理48 h;SIRT1抑制剂组先用10μmol/L SIRT1抑制剂EX527处理2 h,再用100μmol/L芍药苷处理2 h,最后用血管紧张素Ⅱ处理48 h。采用CCK-8法检测细胞活力,Transwell检测细胞迁移能力,用DHA荧光探针检测细胞内活性氧水平,用试剂盒检测氧化应激标志物水平,Western blot检测纤维化相关基因的蛋白表达,qRT-PCR检测细胞外基质和纤维化相关基因的mRNA表达。结果与结论:①与对照组相比,血管紧张素Ⅱ干预后心肌成纤维细胞的增殖、迁移能力明显提高,细胞内活性氧和丙二醛水平升高,超氧化物歧化酶和过氧化氢酶活性降低,α-平滑肌肌动蛋白、Ⅰ型胶原蛋白、Ⅲ型胶原蛋白、纤维连接蛋白、结缔组织生长因子、基质金属蛋白酶9的mRNA表达增加;与模型组相比,芍药苷剂量依赖性抑制上述效应改变(P<0.01);②与模型组相比,芍药苷剂量依赖性上调SIRT1的蛋白表达(P<0.001);③与芍药苷高剂量组相比,SIRT1抑制剂组细胞迁移数量、α-平滑肌肌动蛋白、Ⅰ型胶原蛋白、Ⅲ型胶原蛋白表达水平显著增加(P<0.01)。结果表明,芍药苷可能通过上调SIRT1的表达,有效减轻了血管紧张素Ⅱ诱导的心肌成纤维细胞纤维化改变,剂量依赖性地抑制了心肌成纤维细胞氧化应激和细胞外基质沉积,对于心肌成纤维细胞纤维化具有保护作用。

关键词：芍药苷心肌成纤维细胞血管紧张素Ⅱ 细胞外基质纤维化氧化应激

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

Design of a Lightweight Force-Feedback Glove with a Large Workspace

引用

Engineering 2018年第6期4卷 869-880页

作者： Yukai Zheng Dangxiao Wang Ziqi Wang Yu Zhang yuru Zhang Weiliang Xu State Key Laboratory of Virtual Reality Technology and Systems Beihang UniversityBeijing 100083China Beijing Advanced Innovation Center for Biomedical Engineering Beihang UniversityBeijing 100083China Department of Mechanical Engineering University of AucklandAuckland 1142New Zealand

A wearable force-feedback glove is a promising way to enhance the immersive sensation when a user interacts with virtual objects in virtual reality *** challenges for such a glove include allowing a large fingertip workspace,providing a desired force sensation when simulating both free-and constrained-space interactions,and ensuring a lightweight *** this paper,we present a forcefeedback glove using a pneumatically actuated mechanism mounted on the dorsal side of the user’s *** means of a triple kinematic paired link with a curved sliding slot,a hybrid cam-linkage mechanism is proposed to transmit the resistance from the pneumatic piston rod to the *** order to obtain a large normal component of the feedback force on the user’s fingertip,the profile of the sliding slot was synthesized through an analysis of the force equilibrium on the triple kinematic paired link.A prototype five-fingered glove with a mass of 245 g was developed,and a wearable force-measurement system was constructed to permit the quantitative evaluation of the interaction performance in both free and constrained *** experimental results confirm that the glove can achieve an average resistance of less than 0.1 N in free-space simulation and a maximum fingertip force of 4 N in constrained-space *** experiment further confirms that this glove permits the finger to move freely to simulate typical grasping gestures.

关键词： Force-feedback glove Lightweight Large workspace Pneumatic Virtual reality

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Interactions between natural biofilm,substratum surface wettability,and mussel plantigrade settlement

引用

Science China Earth Sciences 2017年第2期60卷 382-390页

作者： YANG jinLong GUO XingPan DING DeWen GAO Wei HUANG DaoFen CHEN yuru LIANG Xiao Marine Ecology Research Center The First Institute of Oceanography State Oceanic AdministrationQingdao 266061China Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources Shanghai Ocean UniversityMinistry of EducationShanghai 201306China Collaborative Innovation Center for Zhejiang Marine High-efficiency and Healthy Aquaculture Ningbo 315211China

Mytilus galloprovincialis is a major fouling organism in the inter-tidal ***,the interactions between *** plantigrade settlement,biofilm characteristics,and surface wettability remains ***,we examined *** plantigrade settlement responses to marine biofilms(BFs)on surfaces of varying *** significant difference in mussel settlement was observed on young BFs(7 d)on surfaces of differing wettability;while settlement decreased on older BFs(14,21,and 28 d)formed on low compared to high wettability *** wettability affected BF *** standardized harmonic mean and water contact angles values were not correlated with diatom density and chlorophyll a concentration,but were correlated with bacterial density,dry weight,and *** gradient gel electrophoresis revealed that bacterial community structure differed on BFs on surfaces of varying ***,surface wettability affects biofilm characteristics,and the subsequent changes in BF characteristics may be responsible for the variation in biofilm-inducing activity of *** plantigrade settlement.

关键词： Mytilus galloprovincialis Plantigrade settlement Biofilms Surface wettability Bacterial community

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

Effect of carbon coating on electrochemical properties of AB_(3.5)-type La-Y-Ni-based hydrogen storage alloys

引用

Journal of Rare Earths 2022年第8期40卷 1264-1271页

作者： Ran Wu Huiping Yuan yuru Liu Zhenyu Hou Zhinian Li Shumao Wang Lijun jiang Lei Hao National Engineering Research Center of Nonferrous Metals Materials and Products for New Energy GRINM Group Co.Ltd.Beijing 100088China GRIMAT Engineering Institute Co. Ltd.Beijing 101407China General Research Institute for Nonferrous Metals Beijing 100088China Institute for Advanced Materials and Technology University of Science&Technology BeijingBeijing 100083China

The superlattice La-Y-Ni-based hydrogen storage alloys have high discharge capacity and are easy to ***,there is still a gap in commercial applications because of the severe corrosion of the alloys in electrolyte and poor high-rate dischargeability(HRD).Therefore,(LaSmY)(NiMnAl)_(3.5) alloy was prepared by magnetic levitation induction melting,and then the alloy was coated with different contents(0.1 wt%-1.0 wt%) of nano-carbons by low-temperature sintering with sucrose as the carbon source in this *** results show that the cyclic stability and HRD of the alloy first increase and then decrease with the increase of carbon *** kinetic results show that the electrocatalytic activity and conductivity of the alloy electrodes can be enhanced by carbon *** electrochemical properties of the alloy are the best when the carbon coating content is 0.3 wt%.Compared with the uncoated alloy,the maximum discharge capacity(C_(max)) improves from 354.5 to 359.0 mAh/g,the capacity retention rate after 300 cycles(S_(300)) enhances from 73.15% to 80.01%,and the HRD_(1200) of the alloy enhances from 74.39% to 74.39%.

关键词： La-Y-Ni-based alloy Sucrose Carbon coating Electrochemical properties Ni/MH batteries Rare earths

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

Influence of magnetic filter field on the radio-frequency negative hydrogen ion source of neutral beam injector for China Fusion Engineering Test Reactor

引用

Plasma Science and Technology 2021年第11期23卷 185-192页

作者： Yingjie WANG jiawei HUANG yuru ZHANG Fei GAO Younian WANG Key Laboratory of Materials Modification by Laser Ionand Electron Beams(Ministry of Education)School of PhysicsDalian University of TechnologyDalian 116024People's Republic of China

In the design of negative hydrogen ion sources,a magnetic filter field of tens of Gauss at the expansion region is essential to reduce the electron temperature,which usually results in a magnetic field of around 10 Gauss in the driver region,destabilizing the *** magnetic shield technique is proposed in this work to reduce the magnetic field in the driver region and improve the discharge *** this paper,a three-dimensional fluid model is developed within COMSOL to study the influence of the magnetic shield on the generation and transport of plasmas in the negative hydrogen ion *** is found that when the magnetic shield material is applied at the interface of the expansion region and the driver region,the electron density can be effectively *** instance,the maximum of the electron density is 6.7×10^(17)m^(-3)in the case without the magnetic shield,and the value increases to 9.4×10^(17)m^(-3)when the magnetic shield is introduced.

关键词： radio-frequency negative hydrogen ion sources three-dimensional fluid model neutral beam injection

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：