检索结果-南通市图书馆

人力资本扩张与企业出口贸易方式——高等教育改革驱动贸易高质量发展的证据

在线全文

学校读者我要写书评

暂无评论

商业经济与管理 2024年第6期 18-35页

作者：毛其淋杨琦南开大学经济行为与政策模拟实验室南开大学经济学院

由间接出口向直接出口的贸易方式转变对出口企业长远发展极为重要，是中国能否实现对外贸易高质量发展的关键。研究发现，人力资本扩张能够提高企业的直接出口概率。渠道检验表明，人力资本扩张能够有效提高企业的生产率、缓解企业融资... 详细信息

由间接出口向直接出口的贸易方式转变对出口企业长远发展极为重要，是中国能否实现对外贸易高质量发展的关键。研究发现，人力资本扩张能够提高企业的直接出口概率。渠道检验表明，人力资本扩张能够有效提高企业的生产率、缓解企业融资约束和降低企业的出口固定成本，进而促使企业更多地选择直接出口贸易方式。异质性分析发现，人力资本扩张对民营企业、小企业、技术密集型企业、东部沿海地区的企业选择直接出口贸易方式的促进效应更大。最后，发现人力资本扩张促进了企业从间接出口向直接出口转变，并且这种转变还是人力资本扩张提升企业出口国内附加值和扩大出口规模的重要途径。从人力资本扩张的视角揭示了企业出口贸易方式选择与转变的驱动因素，对于理解和深化高等教育改革、有效促进出口转型升级具有一定的政策参考价值。

关键词：人力资本出口贸易方式直接出口间接出口

VOCs催化燃烧催化剂抗SO_(2)中毒研究进展

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

分子催化（中英文） 2024年第3期38卷 284-296,I0004页

作者：杨丹董芳张继义唐志诚中国科学院兰州化学物理研究所精细石油化工中间体国家工程研究中心甘肃兰州730000 兰州理工大学石油化工学院甘肃兰州730050

在VOCs催化氧化过程中,二氧化硫易与反应物在催化剂活性位点上产生竞争吸附行为,且能够与活性物种或载体反应生成硫酸盐使催化剂中毒,严重影响了催化氧化反应的效率.我们总结了催化剂的SO_(2)中毒行为,概括了目前在贵金属、非贵金属催... 详细信息

在VOCs催化氧化过程中,二氧化硫易与反应物在催化剂活性位点上产生竞争吸附行为,且能够与活性物种或载体反应生成硫酸盐使催化剂中毒,严重影响了催化氧化反应的效率.我们总结了催化剂的SO_(2)中毒行为,概括了目前在贵金属、非贵金属催化剂的设计中应用较为广泛的抗SO_(2)中毒措施,如助剂掺杂、双金属体系构建、载体改性、核壳结构设计等,剖析了催化剂酸性位的增强、结构的稳固、壳层保护等抵御SO_(2)吸附与反应的原理,并对VOCs领域内抗SO_(2)中毒催化剂的设计进行了总结与展望.

关键词： VOCs 催化燃烧硫中毒核壳结构

Dynamic regulation of the irrigation-nitrogen-biochar nexus for the synergy of yield,quality,carbon emission and resource use efficiency in tomato

在线全文

学校读者我要写书评

暂无评论

Journal of Integrative Agriculture 2024年第2期23卷 680-697页

作者： Ping’an Zhang Mo Li Qiang Fu Vijay PSingh Changzheng Du Dong Liu Tianxiao Li Aizheng yang School of Water Conservancy&Civil Engineering Northeast Agricultural UniversityHarbin 150030China Key Laboratory of Effective Utilization of Agricultural Water Resources Ministry of Agriculture and Rural Affairs/Northeast Agricultural UniversityHarbin 150030China Department of Biological and Agricultural Engineering&Zachry Department of Civil&Environmental Engineering Texas A&M UniversityTX 77843-117USA National Water and Energy Center UAE UniversityAI Ain999041United Arab Emirates Heilongjiang Agricultural Engineering Vocational College Harbin 150030China

Integrated water and fertilizer management is important for promoting sustainable development of facility agriculture,and biochar plays an important role in guaranteeing food production,as well as alleviating water shortages and the overuse of *** field experiment had twelve treatments and a control(CK)trial including two irrigation amounts(I1,100%ETm;I2,60%ETm;where ETm is the maximum evapotranspiration),two nitrogen applications(N1,360 kg ha^(−1);N2,120 kg ha^(−1))and three biochar application levels(B1,60 t ha^(−1);B_(2),30 t ha^(−1)and B3,0 t ha^(−1)).A multi-objective synergistic irrigation-nitrogen-biochar application system for improving tomato yield,quality,water and nitrogen use efficiency,and greenhouse emissions was developed by integrating the techniques of experimentation and ***,a coupled irrigation-nitrogen-biochar plot experiment was ***,tomato yield and fruit quality parameters were determined experimentally to establish the response relationships between irrigation-nitrogen-biochar dosage and yield,comprehensive quality of tomatoes(TCQ),irrigation water use efficiency(IWUE),partial factor productivity of nitrogen(PFPN),and net greenhouse gas emissions(NGE).Finally,a multi-objective dynamic optimization regulation model of irrigation-nitrogen-biochar resource allocation at different growth stages of tomato was constructed which was solved by the fuzzy programming *** results showed that the application of irrigation and nitrogen to biochar promoted increase in yield,IWUE and PFPN,while it had an inhibitory effect on *** addition,the optimal allocation amounts of water and fertilizer were different under different *** yield of the S1 scenario increased by 8.31%compared to the B_(1)I_(1)N_(2) treatment;TCQ of the S2 scenario increased by 5.14%compared to the B_(2)I_(2)N_(1) treatment;IWUE of the S3 scenario increased by 10.01%compared to the B1I2N2 treatment;PFPN of the S4 scenario increased by

关键词： irrigation-nitrogen-biochar dynamic regulation multi-dimensional target collaboration tomato sustainability

UVR8-TCP4-LOX2 module regulates UV-B tolerance in Arabidopsis

在线全文

学校读者我要写书评

暂无评论

Journal of Integrative Plant Biology 2024年第5期66卷 897-908页

作者： Cheng Li Jiancan Du Huini Xu Zhenhua Feng Caspar CCChater Yuanwen Duan yongping yang Xudong Sun Yunnan Key Laboratory of Crop Wild Relatives Omics The Germplasm Bank of Wild SpeciesKunming Institute of BotanyChinese Academyof SciencesKunming 650201China University of Chinese Academy of Sciences Beijing 100049China CAs Key Laboratory of Tropical Plant Resources and Sustainable Use Xishuangbanna Tropical Botanical GardenChinese Academy of SciencesKunming 650223China Faculty of Life Science and Technology Kunming University of Science and TechnologyKunming 650031China Royal Botanic Gardens KewRichmondSurrey TW93AEUK

The phytohormone jasmonate(JA)coordinates stress and growth responses to increase plant survival in unfavorable *** JA can enhance plant UV-B stress tolerance,the mechanisms underlying the interaction of UV-B and JA in this response remain *** this study,we demonstrate that the UV RESISTANCE LOCUS 8-TEOSINTE BRANCHED1,Cycloidea and PCF 4-LIPOXYGENASE2(UVR8-TCP4-LOX2)module regulates UV-B tolerance dependent on JA signaling pathway in Arabidopsis *** show that the nucleus-localized UVR8 physically interacts with TCP4 to increase the DNA-binding activity of TCP4 and upregulate the JA biosynthesis gene ***,UVR8 activates the expression of LOX2 in a TCP4-dependent *** genetic analysis also provides evidence that TCP4 acts downstream of UVR8 and upstream of LOX2 to mediate plant responses to UV-B *** results illustrate that the UV-B-dependent interaction of UVR8 and TCP4 serves as an important UVR8-TCP4-LOX2 module,which integrates UV-B radiation and JA signaling and represents a new UVR8 signaling mechanism in plants.

关键词： anthocyanin accumulation jasmonic acid TCP4 UV-B UVR8

Survey of hepatitis B virus infection for liver cancer screening in China:A population-based,cross-sectional study

在线全文

学校读者我要写书评

暂无评论

Chinese Medical Journal 2024年第12期137卷 1414-1420页

作者： yongjie Xu Changfa Xia He Li Maomao Cao Fan yang Qianru Li Mengdi Cao Wanqing Chen Office of Cancer Screening National Cancer Center/National Clinical Research Center for Cancer/Cancer HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100021China Office of National Cancer Regional Medical Centre in Liaoning Province The First Affiliated Hospital of China Medical UniversityShenyangLiaoning 110001China

Background:Hepatitis B virus(HBV)infection is the primary cause of hepatocellular carcinoma(HCC)in *** target population for HCC screening comprises individuals who test positive for hepatitis B surface antigen(HBsAg).However,current data on the prevalence of HBV infection among individuals who are eligible for HCC screening in China are *** aimed to assess the seroepidemiology of HBV infection among Chinese individuals eligible for HCC screening to provide the latest evidence for appropriate HCC screening strategies in ***:Questionnaires including information of sex,age,ethnicity,marital status,educational level,source of drinking water,as well as smoking and alcohol consumption history and serum samples were collected from females aged 45-64 years and males aged 35-64 years in 21 counties from 4 provinces in eastern and central China between 2015 and ***-linked immunosorbent assay methods were used to detect the serum HBV marker ***:A total of 603,082 individuals were enrolled,and serum samples were collected for analysis from January 1,2015 to December 31,*** prevalence of HBsAg positive in the study population was 5.23%(31,528/603,082).The prevalence of HBsAg positive was greater in males than in females(5.60%[17,660/315,183]vs 4.82%[13,868/287,899],χ^(2)=187.52,P<0.0001).The elderly participants exhibited a greater prevalence of HBV infection than younger participants(χ^(2)=41.73,P<0.0001).Birth cohort analysis revealed an overall downward trend in HBV prevalence for both males and *** born in more recent cohorts exhibited a lower prevalence of HBV infection as compared to those born ***:The current prevalence of HBV infection remains above 5%in populations eligible for HCC screening in *** efforts should be made to increase the accessibility of HCC screening among individuals with HBV infection.

关键词： Hepatitis B virus Liver cancer screening China Hepatitis B surface antigens Early detection of cancer

Enabling an Inorganic-Rich Interface via Cationic Surfactant for High-Performance Lithium Metal Batteries

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2024年第8期16卷 1-17页

作者： Zejun Sun Jinlin yang Hongfei Xu Chonglai Jiang Yuxiang Niu Xu Lian Yuan Liu Ruiqi Su Dayu Liu Yu Long Meng Wang Jingyu Mao Haotian yang Baihua Cui Yukun Xiao Ganwen Chen Qi Zhang Zhenxiang Xing Jisheng Pan Gang Wu Wei Chen Department of Chemistry National University of Singapore3 Science Drive 3Singapore 117543Singapore Agency for Science Technology and Research(A*STAR)Institute of High-Performance Computing1 Fusionopolis Way#16‑16 ConnexisSingapore 138632Singapore Department of Physics National University of Singapore2 Science Drive 3Singapore 117542Singapore Joint School of National University of Singapore and Tianjin University International Campus of Tianjin UniversityBinhai New CityFuzhou 350207People’s Republic of China Agency for Science Technologyand Research(A*STAR)Institute of Materials Research and EngineeringInnovis2 Fusionopolis Way#08‑03Singapore 138634Singapore

An anion-rich electric double layer(EDL)region is favorable for fabricating an inorganic-rich solid-electrolyte interphase(SEI)towards stable lithium metal anode in ester ***,cetyltrimethylammonium bromide(CTAB),a cationic surfactant,is adopted to draw more anions into EDL by ionic interactions that shield the repelling force on anions during lithium *** situ electrochemical surface-enhanced Raman spectroscopy results combined with molecular dynamics simulations validate the enrichment of NO_(3)^(−)/FSI−anions in the EDL region due to the positively charged CTA^(+).In-depth analysis of SEI structure by X-ray photoelectron spectroscopy and time-of-flight secondary ion mass spectrometry results confirmed the formation of the inorganic-rich SEI,which helps improve the kinetics of Li^(+)transfer,lower the charge transfer activation energy,and homogenize Li *** a result,the Li||Li symmetric cell in the designed electrolyte displays a prolongated cycling time from 500 to 1300 h compared to that in the blank electrolyte at 0.5 mA cm^(-2) with a capacity of 1 mAh cm^(-2).Moreover,Li||LiFePO_(4) and Li||LiCoO_(2) with a high cathode mass loading of>10 mg cm^(-2) can be stably cycled over 180 cycles.

关键词： Cationic surfactant Lithium nitrate additive Solid-electrolyte interphase Electric double layer Lithium metal batteries

在线全文

学校读者我要写书评

暂无评论

永利铔厂创办史对理工类专业课程思政的启示

化学教育（中英文） 2024年第16期45卷 121-129页

作者：邓锋周治勇丁会玲马秀勤贵州工程应用技术学院贵州省高等学校新型锂离子电池材料研究与开发重点实验室贵州毕节551700 贵州工程应用技术学院机械工程学院贵州毕节551700 贵州工程应用技术学院马克思主义学院贵州毕节551700 毕节二中历史教研组贵州毕节551700

在“大思政课”格局下,开发利用永利铔厂等工业遗产是理工类专业课程思政建设的新途径。通过史料演绎范旭东、侯德榜等中国化学工业先驱创办永利铔厂的时代背景及承办权争取、筹办、建成等过程,可知其在创立中国基础化学工业、开创中国... 详细信息

在“大思政课”格局下,开发利用永利铔厂等工业遗产是理工类专业课程思政建设的新途径。通过史料演绎范旭东、侯德榜等中国化学工业先驱创办永利铔厂的时代背景及承办权争取、筹办、建成等过程,可知其在创立中国基础化学工业、开创中国化肥工业和合成氨工业、奠定中国工业产业链基础、保障国家农业和国防安全等方面的重大意义,生动体现了中国传统文化中自强不息的精神和不服输的民族主义情结,天下兴亡匹夫有责的家国情怀,勇攀高峰的科学家精神和精益求精的工匠精神。基于这些历史素材、意义和精神进行理工类专业课程思政建设,与高校课程思政建设的目标要求内在一致,可广泛传承弘扬工业遗产的精神价值,有助于增强思想政治教育的亲和力和协同性。

关键词：永利铔厂课程思政工业遗产工业文化范旭东侯德榜

Improving landscape connectivity through habitat restoration:application for Asian elephant conservation in Xishuangbanna Prefecture,China

在线全文

学校读者我要写书评

暂无评论

Integrative Zoology 2024年第2期19卷 319-335页

作者： Bin WAN Wenwen LI Peng LIU Nian yang Shang CHEN Xianming GUO Bin WANG Li ZHANG Key Laboratory for Biodiversity Science and Ecological Engineering Ministry of EducationCollege of Life SciencesBeijing Normal UniversityBeijingChina Research Center for Coastal Zone Science and Marine Development Strategy First Institute of OceanographyMinistry of Natural ResourcesQingdaoChina School of Biological Sciences The University of Hong KongPokfulamHong KongChina Research Institute of Xishuangbanna National Nature Reserve JinghongChina Xishuangbanna Asian Elephant Conservation and Management Center JinghongChina

Habitat restoration is an effective method for improving landscape connectivity,which can reduce habitat *** landscape connectivity could promote connections between habitat,which is extremely essential to preserve gene flow and population *** study proposes a methodological framework to analyze landscape connectivity for Asian elephant habitat conservation,aiming to provide practical options for reducing habitat fragmentation and improving habitat *** approach involved combining a species distribution model using MaxEnt and landscape functional connectivity models using graph theory to assess the impact on connectivity improvement via farmland/plantation restoration as *** results showed that:(1)there were 119 suitable habitat patches of Asian elephant covering a total area of 1952.41 km^(2).(2)The connectivity between habitats improved significantly after vegetation restoration and the gain first decreased and then increased with the increase of dispersal distance.(3)The first few new habitat patches that were identified played an important role in improving connectivity,and the variation rate of connectivity gradually leveled off as the number of new habitats increased.(4)Prioritization of the 25 best new habitat patches increased connectivity from 0.54%to 5.59%as the dispersal distance increased and mainly was located between two Asian elephant distribution regions and two *** of new habitat patches was effective for improving or restoring *** findings can be used as guidance for improving the studied fragmented Asian elephant habitats,and they can also be used as a reference for the habitat restoration of other endangered species heavily affected by habitat fragmentation.

关键词： Asian elephant connectivity habitat restoration habitat suitability landscape graphs

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

基于时间动态规划的机身冗余控制对接算法

振动．测试与诊断 2024年第1期44卷 30-36,195页

作者：杨超西北工业大学机电学院西安710072 中国航空工业集团公司北京长城航空测控技术研究所北京101111

为了提高中机身的对接精度,保证对接效率,减小支撑底板受力变形,提出了一种基于调姿时间动态规划的机身冗余控制对接算法。根据机身初始位姿以及机身对接精度要求计算机身目标位姿,以姿态调整量和调姿速度为约束条件计算调姿时间,规划... 详细信息

为了提高中机身的对接精度,保证对接效率,减小支撑底板受力变形,提出了一种基于调姿时间动态规划的机身冗余控制对接算法。根据机身初始位姿以及机身对接精度要求计算机身目标位姿,以姿态调整量和调姿速度为约束条件计算调姿时间,规划调姿轨迹。通过调姿轨迹计算定位器各轴驱动量,控制电机联动实现中机身调姿对接。仿真实验结果表明,经过基于调姿时间动态规划的冗余控制对接,飞机机身调姿定位过程中支撑底板无受力变形,减小调姿时间的同时对接精度相对较高,满足机身对接同轴度要求。

关键词：装配机身仿真调姿算法形状控制