检索结果-南通市图书馆

在线全文

学校读者我要写书评

暂无评论

西北温带荒漠典型短生植物对积雪变化的响应

Journal of Plant Ecology 2023年第4期16卷 1-14页

作者： jin-fei Yin Xiao-Bing Zhou Nan Wu Yuanming Zhang State Key Laboratory of Desert and Oasis Ecology Xinjiang Institute of Ecology and GeographyChinese Academy of SciencesUrumqi 830011China Yantai Key of Coastal Hydrological Process and Environment Security Ludong UniversityYantai 264025China

温带荒漠生态系统积雪变化影响植物的多样性、丰富度及其分布。这些生态系统中草本植物的生长和分布与积雪深度密切相关,积雪由于旱季缺水而成为生长期最重要的水资源。然而,温带荒漠植物对冬季积雪变化的响应仍不清楚。本研究旨在探讨... 详细信息

温带荒漠生态系统积雪变化影响植物的多样性、丰富度及其分布。这些生态系统中草本植物的生长和分布与积雪深度密切相关,积雪由于旱季缺水而成为生长期最重要的水资源。然而,温带荒漠植物对冬季积雪变化的响应仍不清楚。本研究旨在探讨积雪变化对草本植物根系生长的影响。以古尔班通古特沙漠为研究对象,研究了冬季4种积雪深度处理下荒漠典型短生植物尖喙牻牛儿苗(Erodium oxyrhinchum)的生长情况。4种积雪深度处理分别是:移除积雪(−S)、自然降雪、加2倍深度积雪(+S)和加3倍深度积雪(+2S)。研究结果显示,积雪深度的增加提高了草本植物的丰度和生长速度,同时也提高了这些植物的生物量(包括总生物量和个体生物量)。雪的添加显著增加了尖喙牻牛儿苗的叶面积,而叶干物质含量则对雪的添加呈现相反的响应。这些结果表明,该植物的地上部分比地下部分对积雪变化更敏感。积雪深度的变化也影响根系形态。积雪移除使侧根增多,增加积雪深度促进主根伸长,有助于其吸收更多的水分和养分。这些结果解释了冬季积雪深度的变化如何改变温带沙漠生态系统生长期间的植物生长、群落结构和生态系统功能。

关键词：积雪覆盖植物生长根系形态温带荒漠短生植物

Clinical Value of Hepatoma-Specific Alpha-Fetoprotein in the Diagnosis of Hepatocellular Carcinoma

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

Chinese Journal of Clinical Oncology 2006年第3期3卷 153-157页

作者： Runzhou Ni Mingbing Xiao fei jin Cuihua Lu Jiefei Huang Xianyong Meng Department of Gastroenterology Affiliated Hospital of Nantong University Nantong 226001 Jiangsu Province China.

OBJECTIVE To study the clinical value of hepatoma-specific alpha-feto- protein (HS-AFP) in the diagnosis and differential diagnosis of hepato- cellular carcinoma (HCC). METHODS A method of vertical slab polyacrylamide gel electrophoresis with discontinuous buffer system was developed to separate AFP sub- types. After separation, the AFP subtypes were transferred to nitrocellu- lose and reacted first with rabbit anti-human AFP and then with goat an- ti-rabbit IgG -HRP. Finally, AFP subtypes were visualized by reacting with 3,3’-diaminobenzidine tetrahydrochloride. A HS-AFP band was de- termined in 82 cases with HCC and 95 cases with benign liver diseases. The correlations between the positive rates of HS-AFP and serum AFP concentration, tumor size as well as portal vein metastasis were analyzed. RESULTS Serum AFP in the cases with various liver diseases was sepa- rated into one to several bands. The fastest band on electrophoresis (F- AFP) was found in all patients, while the band at the cathodal site (HS- AFP) was detected predominantly in HCC but rarely in benign liver dis- eases. The positive rate of HS-AFP in HCC was 74.4%, which was sig- nificantly higher than that in benign liver diseases (9.1%, 7.3% and 10.0% in liver cirrhosis, chronic hepatitis and acute hepatitis respectively). HS- AFP was detected in 3 out of 9 HCC cases with AFP<50 μg/L , but in none of 22 cases of benign liver diseases with the same AFP concentra- tion. HS-AFP correlated with serum AFP concentration and tumor size to some extent, but not with portal vein metastasis. CONCLUSION HS-AFP increases the sensitivity of diagnosing HCC in patients with negative AFP, and is useful in distinguishing high AFP due to HCC from that caused by benign liver diseases.

关键词： hepatoma alpha-fetoprotein heterogeneity diagnosis.

Anlotinib in combination with pembrolizumab for low-grade myofibroblastic sarcoma of the pancreas: A case report

在线全文

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2023年第35期11卷 8385-8391页

作者： Rong-Ting Wu Ji-Cheng Zhang Cheng-Nan Fang Xiao-Yu Qi jin-fei Qiao Ping Li Li Su Graduate School of Anhui University of Chinese Medicine Anhui University of Chinese MedicineHefei 230022Anhui ProvinceChina Department of Chinese Integrative Medicine Oncology The First Affiliated Hospital of Anhui Medical UniversityHefei 230022Anhui ProvinceChina Oncology and General Practice Suzhou Hospital of Traditional Chinese MedicineSuzhou 234000Anhui ProvinceChina The First Clinical College of Anhui Medical University Anhui Medical UniversityHefei 230022Anhui ProvinceChina

BACKGROUND Low-grade myofibroblastic sarcoma(LGMS)is a rare spindle cell sarcoma espe-cially in the pancreas,with myofibroblastic ***,only a few cases have been *** SUMMARY Herein,we report a case involving the discovery of a pancreatic mass detected during a routine physical *** imaging and pathological tests of the patient led to the diagnosis of LGMS of the *** surgical intervention,the patient experienced recurrence and *** treatment is not effective for postoperative recurrent pancreatic LGMS with multiple *** communicating with the patients and their families,informed consent was obtained for the treatment of anlotinib combined with *** of imaging and clinical symptoms post-treatment revealed a relatively favorable response to the combination of anlotinib and *** Based on the comprehensive literature review,our report aimed to provide evidence for a better understanding of the disease characteristics,diagnostic criteria,imaging findings,and identification of *** explore novel treatment strategies for this disease.

关键词： Low-grade myofibroblastic sarcoma Pancreas Pembrolizumab Anlotinib Immunohistochemistry Pathology Case report

对英国君主立宪制的再认识——“延续与变迁”概念在历史教学中的运用

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

历史教学（上半月） 2019年第3期 39-44页

作者：金飞苏州市南环实验中学

提到英国君主立宪制,以往总被拿作与波澜壮阔的法国大革命作比较,借以说明英国革命的保守性、不彻底性。但2018年9月开始使用的教育部统编《世界历史》九年级新教材的论述表明,英国君主立宪制的形成是对英国历史文化传统的继承与发展,... 详细信息

提到英国君主立宪制,以往总被拿作与波澜壮阔的法国大革命作比较,借以说明英国革命的保守性、不彻底性。但2018年9月开始使用的教育部统编《世界历史》九年级新教材的论述表明,英国君主立宪制的形成是对英国历史文化传统的继承与发展,是符合英国国情的理性设计,显然这一认识与旧教材有较大差别。

关键词：君主立宪部编历史教科书延续变迁

在线全文

学校读者我要写书评

暂无评论

产业数字化多维度创新特征及发展策略

现代经济探讨 2023年第8期 78-85页

作者：金飞南通大学江苏长江经济带研究院南通226019 南通大学经济与管理学院南通226019

数字技术与实体经济相互渗透,成为推动区域经济协同发展和产业经济转型调整的重要推动力。中国数字经济规模庞大,正处于从消费互联网向产业互联网转化渗透的阶段,但受区域经济差异、地方保护主义、区域市场分割等影响,产业数字化发展存... 详细信息

数字技术与实体经济相互渗透,成为推动区域经济协同发展和产业经济转型调整的重要推动力。中国数字经济规模庞大,正处于从消费互联网向产业互联网转化渗透的阶段,但受区域经济差异、地方保护主义、区域市场分割等影响,产业数字化发展存在地区失衡、投入成本过高、软硬件基础设施薄弱、创新不足限制市场需求等问题,影响了区域经济均衡发展。因此,在产业数字化发展过程中,需要多维发力,在技术创新、产业结构、场景应用和配套机制上完善创新,提升数字技术基础研究能力,实现基础设施的软硬件技术突破,建立健全产业数字化基础发展制度,构建技术创新的全方位保护机制,支持产业数字化创新场景的设计及商业应用,健全产业数字化人才培养交流机制,明晰完善产业数字化发展过程中相关主体关系,以充分发挥数字经济的正向提升作用,抑制其负向效应,促进区域和产业的均衡发展。

关键词：产业数字化数字经济创新应用场景

面向控制的空天飞行器低速段动力学建模及性能折衷分析（英文）

在线全文

学校读者我要写书评

暂无评论

Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2019年第12期20卷 893-907页

作者： Hai-dong SHEN Rui CAO Yan-bin LIU fei-teng jin Yu-ping LU College of Astronautics Nanjing University of Aeronautics and AstronauticsNanjing 210016China College of Automation Engineering Nanjing University of Aeronautics and AstronauticsNanjing 210016China State Key Laboratory of Virtual Reality Technology and Systems Beihang UniversityBeijing 100191China

目的:水平起降空天飞行器需兼顾高速巡航和低速起降性能。本文旨在构建一种面向控制的空天飞行器低速段动力学建模与迭代分析流程,探究质心位置对空天飞行器稳定性及控制性能的影响,并在保证空天飞行器水平起降能力的约束下,迭代获得合... 详细信息

目的:水平起降空天飞行器需兼顾高速巡航和低速起降性能。本文旨在构建一种面向控制的空天飞行器低速段动力学建模与迭代分析流程,探究质心位置对空天飞行器稳定性及控制性能的影响,并在保证空天飞行器水平起降能力的约束下,迭代获得合理的飞行器质心位置。创新点:1.结合几何外形参数化方法、势流理论和0维混合排气涡扇发动机建模方法实现空天飞行器低速段气动/推进性能数据的快速获取;2.基于所获得的气动/推进性能数据,开展代理建模研究,获得适用于性能分析及控制器设计需要的气动力/力矩系数代理模型;3.基于可变质心的气动力/力矩系数代理模型进行空天飞行器水平起降性能分析及质心位置迭代设计。方法:1.通过形状/类型函数法建立空天飞行器几何参数化模型;2.基于势流理论和0维涡扇发动机理论快速获取空天飞行器低速段气动/推进性能数据;3.通过代理模型技术,获得不同质心位置下的飞行器气动力/力矩系数拟合表达式,并基于该表达式确定符合水平起降约束的质心位置。结论:1.空天飞行器研究中,需综合考虑高低速性能,并协调水平起降、稳定性和控制性能等多方面指标;2.本文所提出的空天飞行器概念方案,满足抬头、触地约束的质心范围在距机头65%机身长度处;3.本文所提出的面向控制建模与性能分析流程可以满足空天飞行器概念方案阶段数据快速获取、方案快速迭代优化的要求。

关键词：面向控制建模水平起降稳定性与控制分析性能折衷分析

Activation of Na^＋/K^＋ ATPase with DR Region Antibody Produces Cardioprotection

在线全文

学校读者我要写书评

暂无评论

中国药理通讯 2013年第3期30卷 10-11页

作者： fei Hua jin Zheng jinsong Bian Department of Pharmacology Yong Loo Lin School of Medicine National University of Singapore Singapore

An underdamped and delayed tri-stable model-based stochastic resonance

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

Chinese Physics B 2024年第1期33卷 280-286页

作者：靳艳飞王昊天张婷婷 Department of Mechanics Beijing Institute of TechnologyBeijing 100081China

Stochastic resonance(SR) is investigated in an underdamped tri-stable potential system driven by Gaussian colored noise and a periodic excitation, where both displacement and velocity time-delayed states feedback are considered. It is challenging to study SR in a second-order delayed multi-stable system analytically. In this paper, the improved energy envelope stochastic average method is developed to derive the analytical expressions of stationary probability density(SPD)and spectral amplification. The effects of noise intensity, damping coefficient, and time delay on SR are analyzed. The results show that the shapes of joint SPD can be adjusted to the desired structure by choosing the time delay and feedback gains. For fixed time delay, the SR peak is increased for negative displacement or velocity feedback gain. Meanwhile, the SR peak is decreased while the optimal noise intensity increases with increasing correlation time of noise. The Monte Carlo simulations(MCS) confirm the effectiveness of the theoretical results.

关键词： stochastic resonance underdamped tri-stable system spectral amplification time-delayed feedback

Elevation and Land Use Types Have Significant Impacts on Spatial Variability of Soil Organic Matter Content in Hani Terraced Field of Yuanyang County,China

在线全文

学校读者我要写书评

暂无评论

Rice science 2015年第1期22卷 27-34页

作者： LI Feng-bo LU Guang-de ZHOU Xi-yue NI Hui-xiang XU Chun-chun YUE Chao YANG Xiu-mei FENG jin-fei FANG Fu-ping Rice Science & Technology Information Center China National Rice Research Institute Agro-Tech Extension Center of Yuanyang

Soil organic matter （SOM） content is one of the most important indicators of the sustainability of soil. To maintain sustainable soil utilization and management in fragile Hani terraced field, it is meaningful to investigate the effects of topography and land use type on SOM content. Descriptive statistics and geostatistics were used to analyze the data and the kriging method was applied to map the spatial patterns of SOM content. The results showed that the mean SOM content was 32.76 g/kg, with a variation coefficient of 40%. The SOM content was affected by elevation and land use type. As the increase of elevation, the SOM content in Hani terraced field also increased obviously. The SOM content in tea garden, which is almost at high elevation, was the highest in all six land use types, and the SOM content decreased in a following sequence： tea garden 〉 paddy field 〉 corn field 〉 banana garden 〉 cassava field 〉 sugarcane field. In addition, at the same elevation, the paddy field had the highest SOM content compared with other land use types. All these results demonstrate that paddy field is the most efficient and suitable land use type for SOM conservation at high, middle or low elevations in the fragile Hani terraced field. In order to protect soil quality and maintain the sustainable agricultural development, it is necessary to maintain or even to enlarge the area of paddy field in Yuanyang county, Yunnan Province, China.

关键词： Hani terraced field elevation land use type geostatistics soil organic matter content