检索结果-南通市图书馆

关于大食物安全战略背景下我国油料保障底线目标及对策的商榷

在线全文

学校读者我要写书评

暂无评论

中国油料作物学报 2024年第1期46卷 1-6页

作者：廖伯寿中国农业科学院油料作物研究所湖北武汉430062

树立大食物观和实施大食物安全战略是我国新时代推动食物来源更多元、数量更充足、品质更营养、产业更高效、环境更友好、调控更自主、消费更健康、治理更有力的迫切需要。1978年我国实行改革开放以来,包括油料在内的主要农产品生产、... 详细信息

树立大食物观和实施大食物安全战略是我国新时代推动食物来源更多元、数量更充足、品质更营养、产业更高效、环境更友好、调控更自主、消费更健康、治理更有力的迫切需要。1978年我国实行改革开放以来,包括油料在内的主要农产品生产、贸易、消费发生了历史性巨变,人民生活水平不断提高,但也存在生产和消费结构失衡导致的慢性疾病增多、环境压力加大、安全风险升高等不容忽视的突出问题,其中油料和食用植物油近十多年处于既自给不足又消费超量的两难局面。基于我国自然资源禀赋和经济社会发展的实际,保障未来油料供给安全必须坚持“一靠油菜、二靠花生、多油并举、健康消费”的发展思路,通过综合施策在十年左右将国产植物油产量稳定提高到2000万吨,以确保居民食用油基本消费需求的安全自主供给底线,并不断改善油料产品质量、提高产业竞争力和促进脂质产品的科学健康消费。

关键词：食物安全油料油脂科学消费基本保障底线发展对策

晋语表消极感受的“好X”感叹构式——兼论南北“好X”的差异及其历史来源

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

语言研究 2024年第3期44卷 1-9页

作者：宗守云上海师范大学人文学院上海200234

晋语存在一种表说话人消极感受的“好X”感叹构式,这种感叹构式和南方方言的“好X”有本质的不同。南方方言的“好X”是普通句法结构,句法形式常规,形义关系透明,用法自由;晋语的“好X”是表说话人消极感受的构式,句法上有特异形式,形... 详细信息

晋语存在一种表说话人消极感受的“好X”感叹构式,这种感叹构式和南方方言的“好X”有本质的不同。南方方言的“好X”是普通句法结构,句法形式常规,形义关系透明,用法自由;晋语的“好X”是表说话人消极感受的构式,句法上有特异形式,形义关系不透明,用法上受到一些条件限制。南方方言和晋语的“好X”都是从近代汉语“好X”发展来的,南方方言“好X”是从近代汉语普通句法结构发展为现代汉语普通句法结构,晋语“好X”是从近代汉语普通句法结构发展为构式。

关键词：晋语 “好X” 普通句法结构构式

基于Wasim的三体船耐波性能的敏感性分析

在线全文

学校读者我要写书评

暂无评论

船海工程 2024年第S01期53卷 92-95,100页

作者：姜守阳许小颖中国船级社浙江分社浙江宁波315042 文华学院武汉430074

针对三体船舶在不同海况下的动力响应影响因素进行敏感性分析,并对三体船的主侧体布局进行优化设计。采用三维时域Rankine源法分析一艘典型三体船在不同分离比和不同侧体纵向位置时的耐波性响应特性。采用水动力分析软件Wasim针对3种航... 详细信息

针对三体船舶在不同海况下的动力响应影响因素进行敏感性分析,并对三体船的主侧体布局进行优化设计。采用三维时域Rankine源法分析一艘典型三体船在不同分离比和不同侧体纵向位置时的耐波性响应特性。采用水动力分析软件Wasim针对3种航速、5个浪向、2个横向位置及5个纵向位置多次进行升沉、横摇和纵摇运动响应模拟,对不规则海域内的响应振幅算子(RAO)进行敏感性分析。布局分析结果表明,在船舶的耐波性能方面,对于所有的航速、浪向和模态周期下,侧体布局并没有保持一致的最佳位置,在常规迎浪条件下,主侧体横向间距小利于耐波性能;垂荡和纵摇运动性能的优劣主要取决于主侧体的纵向相对位置。

关键词：三体船主侧体布局耐波性敏感性分析 RAO

Global research landscape of Peutz-Jeghers syndrome and successful endoscopic management of intestinal intussusception in patients with recurrent laparotomies

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

World Journal of Gastrointestinal Surgery 2024年第8期16卷 2702-2718页

作者： Qi Sun Xiao-Ying Wang Guang-Jin Guo Lei Wang Li-Min Meng Yun-Fei Guo Tao Sun shou-Bin Ning Department of Gastroenterology Air Force Medical CenterBeijing 100142China College of Life Science Northwest UniversityXi'an 710069Shaanxi ProvinceChina Clinical Medical Laboratory Air Force Medical CenterBeijing 100142China Department of Medical Imaging Air Force Medical CenterBeijing 100142China Department of Pathology Air Force Medical CenterBeijing 100142China

BACKGROUND Peutz-Jeghers syndrome(PJS)has brought significant physical,psychological and economic burdens on the patients and their families due to its early onset,diagnostic and therapeutic challenges and increased recurrence *** To explore the current research status and emerging hotspots of *** Studies on PJS published during 1994-2023 were gathered based on Web of Science Core ***,a case of PJS-induced intestinal intussusception,successfully treated with endoscopic methods despite three laparotomies,was *** bibliometric and visual analysis were conducted with VOSviewer,R and *** Altogether 1760 studies were identified,indicating a steady increase in the publication *** United States had the highest influence,whereas the University of Helsinki emerged as the leading institution,and Aaltonen LA from the University of Helsinki was the most prolific *** Research,Oncogene and Endoscopy were the top three journals based on *** burst direction analysis revealed that"cancer risk","management","surveillance"and"familial pancreatic cancer"were the potential hotspots for ***,"early detection","capsule endoscopy","clinical management","double-balloon endoscopy","familial pancreatic cancer"and"molecular genetic basis"were identified as the key clusters of co-cited *** polypectomy remained effective on resolving intestinal intussusception in patients who underwent three previous *** In the last three decades,global publications related to PJS show a steadily increasing trend in *** management is currently a research hotspot.

关键词： Peutz-Jeghers syndrome Endoscopy Management Cancer Microbiota Bibliometric

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

中国式现代化、共同富裕及其经济法理论解析

当代法学 2024年第1期38卷 57-69页

作者：张守文北京大学法学院

实现共同富裕是中国式现代化的应有之义,也是一个长期、复杂的系统工程。经济法作为典型的“分配法”和“发展促进法”,尤其有助于保障和促进共同富裕目标的实现。基于“目标—手段”、“价值—规范”的分析框架,对于实现共同富裕所需... 详细信息

实现共同富裕是中国式现代化的应有之义,也是一个长期、复杂的系统工程。经济法作为典型的“分配法”和“发展促进法”,尤其有助于保障和促进共同富裕目标的实现。基于“目标—手段”、“价值—规范”的分析框架,对于实现共同富裕所需解决的基本问题和基本矛盾,所需遵循的基本原理和基本价值,以及所需运用的基本手段等基本理论问题,可以从经济法理论的视角展开解析,由此有助于提炼共同富裕的相关基本理论。鉴于均衡分配和协调发展都是实现共同富裕的基本手段,应在制度规范层面加强两类手段的有机整合,并在此基础上提炼“均衡分配理论”和“协调发展理论”。厘清共同富裕的基本理论问题,有助于增进对共同富裕的系统理解,推进其相关制度建设和经济法治的完善,也有助于深化经济法学、社会法学和发展法学的理论研究。

关键词：共同富裕经济法目标与手段价值与规范分配与发展

Salinity fronts shape spatial patterns in zooplankton distribution in Hangzhou Bay

在线全文

学校读者我要写书评

暂无评论

Acta Oceanologica Sinica 2024年第6期43卷 96-106页

作者： Yepeng Xu Yiqi Wang Lin Zhan Yijun Ou Kangning Jia Ming Mao Xuyu Zhu Zhibing Jiang Yuanli Zhu Wei Huang Ping Du Jiangning Zeng Lu shou Feng Zhou Key Laboratory of Marine Ecosystem Dynamics Second Institute of OceanographyMinistry of Natural ResourcesHangzhou 310012China Key Laboratory of Nearshore Engineering Environment and Ecological Security of Zhejiang Province Hangzhou 310012China State Key Laboratory of Satellite Ocean Environment Dynamics Ministry of Natural ResourcesHangzhou 310012China Nantong Marine Environmental Monitoring Center Ministry of Natural ResourcesNantong 226002China Key Laboratory of Ocean Space Resource Management Technology Ministry of Natural ResourcesHangzhou 310012China Observation and Research Station of Marine Ecosystem in the yangtze River Delta Ministry of Natural ResourcesZhoushan 316021China

Ocean fronts play important roles in nutrient transport and in the shaping ecological *** zones in small bays are typically small in scale,have a complex structure,and they are spatially and temporally variable,but there are limited data on how biological communities respond to this *** Bay,a mediumsized estuary in China,is an ideal place in which to study the response of plankton to small-scale ocean fronts,because three water masses(Qiantang River Diluted Water,Changjiang River Diluted Water,and the East China Sea current) converge here and form dynamic salinity fronts throughout the *** investigate zooplankton communities,and temperature,salinity and chlorophyll a(Chl a) in Hangzhou Bay in June(wet perio d) and December(dry period) of 2022 and examine the dominant environmental factors that affect zooplankton community spatial *** then match the spatial distributions of zooplankton communities with those of salinity fronts.S alinity is the most important explanatory variable to affect zooplankton community spatial variability during both wet and dry periods,in that it contributes>60% of the variability in community ***,the spatial distributions of zooplankton match well with salinity *** December,with weaker Qiantang River Diluted Water and a stronger secondary Changjiang River Plume,zooplankton communities occur in moderate salinity(MS,salinity range 15.6±2.2) and high salinity(HS,22.4±1.7) regions,and their ecological boundaries closely match the Qiantang River Diluted Water *** June,different zooplankton communities occur in low salinity(LS,3.9±1.0),MS(11.7±3.6) and HS(21.3±1.9) *** the LS region occurs abnormally in the central bay rather than its apex because of the anomalous influence of rising and falling tides during the sampling perio d,the ecological boundaries still match salinity ***-salinity or brackish-water zooplankter taxa are relatively more abunda

关键词： zooplankton spatial distribution salinity fronts Hangzhou Bay

辅热式15 kA稀土电解槽电场和热场的仿真分析

在线全文

学校读者我要写书评

暂无评论

稀土 2024年第2期45卷 128-135页

作者：王郅阳逄启寿李彬江西理工大学机电工程学院江西赣州341000

市面上中、小型稀土电解槽存在效率低、底部金属易凝结、产量小等不足。以15 kA稀土电解槽为研究对象,先探究外部铺设辅热装置能否改善电流密度分布和提升温度,再探究辅热位置和辅热温度对电解槽的电场和热场的影响,建立辅热前后电解槽... 详细信息

市面上中、小型稀土电解槽存在效率低、底部金属易凝结、产量小等不足。以15 kA稀土电解槽为研究对象,先探究外部铺设辅热装置能否改善电流密度分布和提升温度,再探究辅热位置和辅热温度对电解槽的电场和热场的影响,建立辅热前后电解槽的电热场三维仿真模型,观察电热场分布情况。结果表明,电解槽外部铺设辅热装置能有效改善电流密度分布,阴极底部最大电流密度有效提升,同时槽内温度有所提升,高温面积增大,有利于电解反应高效持续进行。在电解槽下部铺设辅热设备,并设置辅热温度为1310 K时,阴阳极间电流密度最大,且分布均匀;有利于提升电解效率;同时底部坩埚保持较高温度,可减少稀土金属在坩埚内凝结沉积。

关键词：稀土电解槽辅热装置有限元分析电场分布热场分布

Persistence of charge density wave against variation of band structures in V_(x)Ti_(1−x)Se_(2)(x=0–0.1)

在线全文

学校读者我要写书评

暂无评论

Nano Research 2024年第3期17卷 2129-2135页

作者： Zhanfeng Liu Tongrui Li Wen Zhu Hongwei shou Mukhtar Lawan Adam Qilong Cui Yuliang Li Sheng Wang Yunbo Wu Hongen Zhu Yi Liu shuangming Chen Xiaojun Wu Shengtao Cui Li Song Zhe Sun National Synchrotron Radiation Laboratory CAS Center for Excellence in NanoscienceUniversity of Science and Technology of ChinaHefei 230029China CAS Key Laboratory of Strongly-coupled Quantum Matter Physics University of Science and Technology of ChinaHefei 230026China Collaborative Innovation Center of Advanced Microstructures Nanjing 210093China State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of ChemistryJilin UniversityChangchun 130012China School of Chemistry and Materials Sciences CAS Key Laboratory of Materials for Energy Conversionand CAS Center for Excellence in NanoscienceUniversity of Science and Technology of ChinaHefei 230026China School Zhejiang Institute of Photonelectronics Jinhua 321004China

Charge density wave(CDW)is a phenomenon that occurs in materials,accompanied by changes in their intrinsic electronic *** study of CDW and its modulation in materials holds tremendous significance in materials research,as it provides a unique approach to controlling the electronic properties of ***_(2) is a typical layered material with a CDW phase at low *** V substitution for Ti in TiSe_(2),we tuned the carrier concentration in V_(x)Ti_(1-x)Se_(2) to study how its electronic structures ***-resolved photoemission spectroscopy(ARPES)shows that the band-folding effect is sustained with the doping level up to 10%,indicating the persistence of the CDW phase,even though the band structure is strikingly different from that of the parent compound TiSe_(2).Though CDW can induce the band fold effect with a driving force from the perspective of electronic systems,our studies suggest that this behavior could be maintained by lattice distortion of the CDW phase,even if band structures deviate from the electron-driven CDW *** work provides a constraint for understanding the CDW mechanism in TiSe_(2),and highlights the role of lattice distortion in the band-folding effect.

关键词： charge density wave band structure lattice distortion

基于meta分析的丛枝菌根对小麦产量和品质的影响

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

草业学报 2024年第7期33卷 192-204页

作者：徐寿霞河南科技大学图书馆河南科技大学农学院河南洛阳471023

小麦是人类种植的最为重要的作物之一,对保障粮食安全有着极其重要的作用,因此,小麦的高产、稳产、优质一直是研究的热点科学问题;而丛枝菌根(arbuscular mycorrhizae,AM)是存在于植物根系的最广泛共生体,能够改善植物营养、提高植物产... 详细信息

小麦是人类种植的最为重要的作物之一,对保障粮食安全有着极其重要的作用,因此,小麦的高产、稳产、优质一直是研究的热点科学问题;而丛枝菌根(arbuscular mycorrhizae,AM)是存在于植物根系的最广泛共生体,能够改善植物营养、提高植物产量和提升植物品质。为了系统、全面地评估AM在小麦生产方面的功能,筛选有利于小麦生产的高效AM真菌,本研究采用meta分析方法,基于171篇相关研究文献建立了数据库,整体评价了AM对小麦产量和品质的影响,并探讨了不同AM真菌的效应差异。结果表明,AM能通过提高17.1%的穗粒数和15.7%的千粒重,而实现小麦增产24.2%;同时,AM改善了小麦的品质,使籽粒蛋白质含量提高15.7%,P和Zn含量分别增加15.2%和21.5%;AM对小麦产量和品质的改善可能是基于改善了小麦植物营养状况和叶片叶绿素含量,其提高小麦植株地上部N含量8.4%、P 16.2%、Ca 91.2%和Zn 11.3%,并提高叶绿素含量27.5%。不同属或种的AM真菌对小麦产量和品质的影响存在明显差异,其中,斗管囊霉属真菌的效应更显著和稳定。本研究全面评价了AM对小麦产量和品质的影响,探讨了其作用机制,分析了不同AM真菌的效应差异,以期为丛枝菌根应用于小麦生产,以及选择高效的AM真菌提供理论和实践依据。

关键词：丛枝菌根小麦产量品质菌根效应 meta分析