检索结果-南通市图书馆

出土文献 2024年第1期 89-99,157,172页

作者：刘同川武汉大学简帛研究中心 “古文字与中华文明传承发展工程”协同攻关创新平台

古人堤东汉简牍残泐严重,虽历经多次整理,但部分释文仍有较大改释、补释的空间。本文在最新整理成果的基础之上,对释文中误释和阙释的七、孙、猛、侍、县、长、属、君等字提出个人见解,力求提供更加准确的释文参考。

关键词：东汉古人堤汉简释文校补

THEORETICAL AND EXPERIMENTAL STUDIES OF HYDRAULIC CHARACTERISTICS OF DISCHARGE TUNNEL WITH VORTEX DROP

在线全文

学校读者我要写书评

暂无评论

Journal of Hydrodynamics 2010年第4期22卷 582-589页

作者： CHEN Hua-yong XU Wei-lin DENG jun NIU Zhi-pan liu Shan-jun WANG Wei State Key Laboratory of Hydraulics and Mountain River Engineering Sichuan University Chengdu 610065 China

The velocities at given points in the volute chamber,the contracted section and the vertical dropshaft of a discharge tunnel with vortex drop were measured by a small specially designed L-shaped tube,as Laser Doppler Velocimetry（LDV） or Particle Image Velocimetry（PIV） would not work there due to the special structure of the discharge tunnel with vortex *** empirical formulas were proposed to predict the velocities and the angles of the velocities made with the vertical direction θ.The theoretical analysis results were in good agreement with experimental ***,the method proposed in this paper can be used to analyze related characteristics of discharge tunnels with vortex ***,different model scales were considered to predict the cavitation characteristics on the wall of a dropshaft in practical engineering.

关键词： discharge tunnel with vortex drop dropshaft velocity wall pressure cavitation

Photoperiodism dynamics during the domestication and improvement of soybean

在线全文

学校读者我要写书评

暂无评论

Science China(Life Sciences) 2017年第12期60卷 1416-1427页

作者： Sheng-Rui Zhang Huan Wang Zhongyu Wang Yao Ren Lifang Niu jun liu Bin liu National Key Facility for Crop Resources and Genetic Improvement Institute of Crop Science Chinese Academy of Agricultural Sciences Biotechnology Research Institute Chinese Academy of Agricultural Sciences College of Plant Science Jilin University

Soybean(Glycine max) is a facultative short-day plant with a sensitive photoperiod perception and reaction system, which allows it to adjust its physiological state and gene regulatory networks to seasonal and diurnal changes in environmental conditions. In the past few decades, soybean cultivation has spread from East Asia to areas throughout the world. Biologists and breeders must now confront the challenge of understanding the molecular mechanism of soybean photoperiodism and improving agronomic traits to enable this important crop to adapt to geographical and environmental changes. In this review, we summarize the genetic regulatory network underlying photoperiodic responses in soybean. Genomic and genetic studies have revealed that the circadian clock, in conjunction with the light perception pathways, regulates photoperiodic flowering. Here, we provide an annotated list of 844 candidate flowering genes in soybean, with their putative biological functions. Many photoperiod-related genes have been intensively selected during domestication and crop improvement. Finally, we describe recent progress in engineering photoperiod-responsive genes for improving agronomic traits to enhance geographic adaptation in soybean, as well as future prospects for research on soybean photoperiodic responses.

关键词： photoperiodism soybean circadian clock flowering

Development and validation of a nutrition-related genetic-clinical-radiological nomogram associated with behavioral and psychological symptoms in Alzheimer’s disease

在线全文

学校读者我要写书评

暂无评论

中华医学杂志(英文版) 2024年第18期137卷 2023 Nov 29页

作者： Jiang Jiwei liu Yaou Wang Anxin Zhuo Zhizheng Shi Hanping Zhang Xiaoli Li Wenyi Sun Mengfan Jiang Shirui Wang Yanli Zou Xinying Zhang Yuan Jia Ziyan Xu jun Department of Neurology Beijing Tiantan Hospital Capital Medical University Beijing China National Clinical Research Center for Neurological Diseases Beijing China Department of Radiology Beijing Tiantan Hospital Capital Medical University Beijing China Department of Gastrointestinal Surgery Beijing Shijitan Hospital Capital Medical University Beijing China Department of Clinical Nutrition Beijing Shijitan Hospital Capital Medical University Beijing China Beijing International Science and Technology Cooperation Base for Cancer Metabolism and Nutrition Beijing China

Background: Few evidence is available in the early prediction models of behavioral and psychological symptoms of dementia (BPSD) in Alzheimer’s disease (AD). This study aimed to develop and validate a novel genetic-clinical-radiological nomogram for evaluating BPSD in patients with AD and explore its underlying nutritional ***: This retrospective study included 165 patients with AD from the Chinese Imaging, Biomarkers, and Lifestyle (CIBL) cohort between june 1, 2021, and March 31, 2022. Data on demographics, neuropsychological assessments, single-nucleotide polymorphisms of AD risk genes, and regional brain volumes were collected. A multivariate logistic regression model identified BPSD-associated factors, for subsequently constructing a diagnostic nomogram. This nomogram was internally validated through 1000-bootstrap resampling and externally validated using a time-series split based on the CIBL cohort data between june 1, 2022, and February 1, 2023. Area under receiver operating characteristic (ROC) curves, calibration curves, and decision curve analysis (DCA) were used to assess the discrimination, calibration, and clinical applicability of the ***: Factors independently associated with BPSD were:CETP rs1800775 (odds ratio [OR] = 4.137, 95% confidence interval [CI]: 1.276-13.415,P = 0.018), decreased Mini Nutritional Assessment score (OR = 0.187, 95% CI: 0.086-0.405,P <0.001), increased caregiver burden inventory score (OR = 8.993, 95% CI: 3.830-21.119,P <0.001), and decreased brain stem volume (OR = 0.006, 95% CI: 0.001-0.191,P = 0.004). These variables were incorporated into the nomogram. The area under the ROC curve was 0.925 (95% CI: 0.884-0.967,P <0.001) in the internal validation and 0.791 (95% CI: 0.686-0.895,P <0.001) in the external validation. The calibration plots showed favorable consistency between the prediction of nomogram and actual observations, and the DCA showed that the model was clinically useful in both validatio

关键词： Alzheimer’s disease Behavioral and psychological symptoms Nutrition Brain stem Cholesterol ester transfer proteins Nomogram

Valence and Electronic Shell Configuration Characters of Damage-Resistant Dopants in LiNbO_(3) Crystals

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics Letters 1998年第9期15卷 686-688页

作者： ZHANG Guo-quan ZHANG Guang-yin liu Si-min XU Jing-jun SUN Qian liu Jian-jun Photonics Center College of Physics ScienceNankai UniversityTianjin 300071

We analyze the valence and electronic shell configuration characters of all damage-resistant dopants found in LiNbO_(3) crystals up to *** show that all damage-resistant dopants have only one valence *** also show that the electronic shell configurations of these damage-resistant ions are filled fully,as are the cases of the inert *** this point of view,we conclude that the anti-site NbLi should be involved in the charge transport process,while the Li vacancy VLi is not involved in the charge transport *** also can give us some insights about how to select a damage-resistant dopant for LiNbO_(3) crystal.

关键词： process. valence Configuration

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

基于灰色神经网络的地铁牵引用电预测模型

城市轨道交通研究 2024年第7期27卷 16-20,26页

作者：张军王凯刘佳喜李根赵岩王鹏耿伟张浩陈欢天津市地下铁道集团有限公司天津300011 天津凯发电气股份有限公司天津300392

[目的]为了提高列车运行效率,需对地铁牵引能耗进行监测,并建立相关能耗模型对地铁牵引能耗进行预测分析。[方法]介绍了灰色预测模型和BP(反向传播)神经网络的基本原理;以天津某典型地铁车站2021年6月的牵引日用电量数据为例,采用灰色... 详细信息

[目的]为了提高列车运行效率,需对地铁牵引能耗进行监测,并建立相关能耗模型对地铁牵引能耗进行预测分析。[方法]介绍了灰色预测模型和BP(反向传播)神经网络的基本原理;以天津某典型地铁车站2021年6月的牵引日用电量数据为例,采用灰色关联分析法筛选出与地铁牵引日用电量关联度大的影响因素,基于GM(1,1)灰色预测模型预测出短期牵引日用电量;将所筛选出的关联度大的影响因素、GM(1,1)灰色预测模型预测的短期牵引日用电量及相邻历史牵引日用电量数据,作为BP神经网络模型中的输入量进行训练,建立GM-BP灰色神经网络模型,并生成所需短期地铁牵引日用电量预测数据。[结果及结论]与传统GM(1,1)灰色预测模型和BP神经网络模型相比,通过GM-BP灰色神经网络模型预测的短期牵引日用电量预测误差有明显的改善,能够作为有效的地铁牵引能耗数据进行短期预测数据分析。

关键词：地铁牵引日用电预测量灰色神经网络

Dry-sliding tribological properties of AlCoCrFeNiTi_(0.5)high-entropy alloy

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

Rare Metals 2022年第12期41卷 4266-4272页

作者： Yuan Yu jun Wang Jin-Shan Li Hong-Chao Kou Si-Zhe Niu Sheng-Yu Zhu jun Yang Wei-Min liu State Key Laboratory of Solidification Processing School of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi'an 710072China State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China

High-entropy alloys(HEAs),with a new alloying concept,could possess many unique mechanical and functional *** current work investigated whether one such alloy offers potential for bearing surfaces under dry *** dry,reciprocating sliding wear characteristics of AlCoCrFeNiTi0.5alloy were investigated under various applied loads and sliding *** electron microscopy(TEM) and scanning electron microscopy(SEM) were utilized to characterize internal structure and wear surfaces of the alloy,*** is found that the AlCoCrFeNiTi0.5alloy preserves better wear resistance than Fe77Ni23solid solution alloy,Ti-46Al-2Cr-2Nb intermetallic alloy,or a wear-resistant steel AISI52100,especially under higher *** wear rate increases slowly with the applied loads increasing and keeps steady under different sliding *** wear mechanisms are abrasive wear,adhesive wear and oxidative *** nano-sized Fe-Cr solid solution and Al-NiTi rich intermetallic phase precipitated in the dendritic regions and the formation of oxidation play important roles in the good wear resistances of this high-entropy alloy.

关键词： High-entropy alloy Sliding wear Hardness Surface analysis

老年患者脊柱手术术后谵妄发生的危险因素分析

在线全文

学校读者我要写书评

暂无评论

中国骨伤 2024年第7期37卷 700-705页

作者：张维平常雯茜刘卫义李振军毛建伟甘肃省中医院甘肃兰州730050 甘肃中医药大学甘肃兰州730030

目的:探讨老年患者脊柱手术后谵妄的危险因素。方法:回顾性分析自2021年1月至2023年1月在全麻下行脊柱手术566例患者的基本病例资料,其中男296例,女270例;年龄(71.58±4.21)岁;颈椎手术195例,胸椎手术26例,腰椎手术345例。根据术后是否... 详细信息

目的:探讨老年患者脊柱手术后谵妄的危险因素。方法:回顾性分析自2021年1月至2023年1月在全麻下行脊柱手术566例患者的基本病例资料,其中男296例,女270例;年龄(71.58±4.21)岁;颈椎手术195例,胸椎手术26例,腰椎手术345例。根据术后是否出现谵妄分为术后谵妄组41例与无谵妄组525例。对患者的性别、年龄、体重、吸烟史、饮酒史、手术部位、术前焦虑、术中低血压次数、失血量等可能影响因素进行单因素分析,并对P<0.05的单因素采用二元Logistic回归进行多因素分析。结果:术后谵妄者41例,单因素分析显示,年龄(P=0.000)、手术时间(P=0.039)、术前焦虑(P=0.001)、失血量(P=0.000)、阿片类药物使用史(P=0.003)、脑卒中病史(P=0.005)、术后C反应蛋白(P=0.000)、术后钠离子(P=0.000)在谵妄组与非谵妄组间差异有统计学意义。将上述因素纳入二元Logistic回归分析,结果显示:年龄[OR=0.729,95%CI(0.569,0.932),P=0.012]、阿片类药物使用[OR=21.500,95%CI(1.334,346.508),P=0.031]、失血量[OR=0.932,95%CI(0.875,0.993),P=0.029]、术后C反应蛋白[OR=0.657,95%CI(0.485,0.890),P=0.007]、术前焦虑[OR=23.143,95%CI(1.859,288.090),P=0.015]、术后钠离子[OR=1.228,95%CI(1.032,1.461),P=0.020]是老年患者脊柱手术术后发生谵妄的独立危险因素。结论:年龄、阿片类药物使用、失血量、术前焦虑、C反应蛋白升高、低钠血症是老年患者脊柱手术术后谵妄发生的独立危险因素。

关键词：脊柱手术谵妄危险因素

医疗工程ICU项目施工质量影响因素评价指标体系构建研究

在线全文

学校读者我要写书评

暂无评论

价值工程 2024年第26期43卷 50-55页

作者：朱中静何森熊三娃范伟民刘琪中建科工集团有限公司深圳518118 四川港通医疗设备集团股份有限公司成都610000

医疗工程重症监护病房(ICU)施工质量控制难度大,容易出现医疗工艺设计三级流程不合理、医疗设备安装不精确、医疗设备管理布置不合理等问题,为医疗工程ICU项目质量带来隐患。本文针对医疗工程ICU项目施工质量影响因素进行研究,采用文献... 详细信息

医疗工程重症监护病房(ICU)施工质量控制难度大,容易出现医疗工艺设计三级流程不合理、医疗设备安装不精确、医疗设备管理布置不合理等问题,为医疗工程ICU项目质量带来隐患。本文针对医疗工程ICU项目施工质量影响因素进行研究,采用文献研究法结合德尔菲法构建了医疗工程ICU项目施工质量影响因素指标评价体系,并采用问卷调查法结合模糊综合评价法研究所得到的指标对医疗工程ICU项目施工质量影响程度,发现ICU医疗病房设备配置、ICU病房的设备及环境、ICU病房医疗工艺设计对医疗工程ICU项目施工质量影响程度最大。本研究识别了医疗工程ICU项目施工质量影响因素,分析了这些因素对医疗工程ICU项目施工质量影响程度,为该类型项目参与主体有针对性制定施工质量目标及施工过程中的质量控制提供基础。

关键词：医疗工程ICU项目施工质量问题施工质量影响因素施工质量控制

烟草西柏烷二萜醇类突变体的理化特征及其突变机制解析

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

种子 2024年第3期43卷 61-66页

作者：蒙骏崔帅陆安彬龙本山陈刚刘仁祥贵州大学烟草学院/贵州省烟草品质研究重点实验室贵阳550025 贵州大学农学院/贵州省烟草品质研究重点实验室贵阳550025

以烟草突变体及其野生型为材料,通过测定农艺性状、腺毛密度、西柏烷二萜醇及其代谢前体物含量、西柏烷二萜醇类代谢关键基因的表达量,分析了突变体的生理生化和代谢差异,并结合基因表达差异初步解析了其突变的生理与分子机制。结果表明... 详细信息

以烟草突变体及其野生型为材料,通过测定农艺性状、腺毛密度、西柏烷二萜醇及其代谢前体物含量、西柏烷二萜醇类代谢关键基因的表达量,分析了突变体的生理生化和代谢差异,并结合基因表达差异初步解析了其突变的生理与分子机制。结果表明,突变体西柏三烯一醇和西柏三烯二醇含量分别是野生型的2.63倍和4.03倍,均极显著高于野生型;突变体分泌型腺毛密度为757.38条/cm 2,极显著大于野生型;突变体西柏烷二萜醇类代谢前体物IPP和GGPP分别为849.83 ng/g、298.29 ng/g,与野生型间的差异不显著;突变体西柏三烯一醇合成酶基因NtCYC-1、西柏三烯二醇合成酶基因NtCYP71D16的表达量分别是野生型的17.77倍和20.89倍,均极显著高于野生型。研究表明,突变体是一个培育优质、抗虫烤烟新品种的优良材料;其发生突变的原因是NtCYC-1、NtCYP71D16基因发生表达上调,促进了西柏三烯一醇、西柏三烯二醇的合成反应,同时,突变体的分泌型腺毛密度更高,为西柏烷二萜醇类的合成提供了更多的场所,使得西柏烷二萜醇类的含量显著提高。

关键词：烟草西柏三烯一醇西柏三烯二醇腺毛蚜虫