检索结果-南通市图书馆

New discovery of fossil cycad-like plants from the Middle Jurassic of West Liaoning,china

在线全文

学校读者我要写书评

暂无评论

Science Bulletin 2005年第16期 134-137页

作者： SAIKI Keni’chi Natural History Museum and Institute Japan chiba 260-8086

Combined detection of serum tumor markers for differential diagnosis of solid lesions located at the pancreatic head

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Hepatobiliary & Pancreatic Diseases International 2007年第6期6卷 641-645页

作者： Liao, Quan Zhao, Yu-Pei Yang, Ying-chi Li, Li-Jun Long, Xiao Han, Shao-Mei Beijing Union Med Coll Hosp Dept Gen Surg Beijing 100730 Peoples R China

BACKGROUND: The differential diagnosis of solid lesions located at the pancreatic head is very important for choosing therapies and setting up surgical tactics. This study was designed to evaluate the clinical significance of combined measurement of multiple serum tumor markers and the application of the receiver-operating characteristic (ROC) curves in the differential diagnosis of solid lesions located at the pancreatic head. METHODS: The serum levels of CA19-9, CA242, CA50 and carcinoembryonic antigen (CEA) in 112 patients with carcinoma of the pancreatic head and 38 patients with focal chronic pancreatitis in the pancreatic head were measured with ELISA. The sensitivity, specificity, positive likelihood ratio (PLR) and negative likelihood ratio (NLR) of the four serum tumor markers were calculated. The ROC curves for the four serum tumor markers were constructed and the area under the curve (AUC) was calculated. RESULTS: The AUCs of CA19-9, CA242, CA50 and CEA were 0.805, 0.749, 0.738 and 0.705; the PLRs were 1.91, 3.43, 5.09 and 5.46; and the NLRs were 0.41, 0.56, 0.59 and 0.71, respectively. Combined measurements increased the diagnostic specificity, and parallel combined testing increased the diagnostic sensitivity. CONCLUSIONS: Combined measurement of serum tumor markers CA19-9, CA242, CA50 and CEA is valuable in differential diagnosis of solid lesions located at the pancreatic head, and CA19-9 has the best diagnostic ability. Combined measurements can increase the specificity of diagnosis. Evaluation with the ROC curve is better than the sensitivity or specificity alone and the results are more integrated and objective.

关键词： pancreatic neoplasm tumor markers ROC curve differential diagnosis

Higher risk of type 2 diabetes in young women with polycystic ovary syndrome: A 10-year retrospective cohort study

在线全文

学校读者我要写书评

暂无评论

World Journal of Diabetes 2022年第3期13卷 240-250页

作者： Wan-Ting Liao Jing-Yang Huang Ming-Tsung Lee Yu-Cih Yang chun-chi Wu Institute of Medicine Chung-Shan Medical UniversityTaichung 402Taiwan chinese Medicine Department Show Chwan Memorial HospitalChanghua 500Taiwan Research Center for Health Data Science Chung Shan Medical University HospitalTaichung 402Taiwan National Center for Geriatrics and Welfare Research National Health Research InstitutesYunlin 632Taiwan Clinical Trial Research Center China Medical University HospitalTaichung 404Taiwan

BACKGROUND Polycystic ovary syndrome(PCOS)is a common disorder in women of reproductive *** the last few decades,research studies have revealed that PCOS is strongly associated with metabolic disorders,including metabolic syndrome,obesity,insulin resistance and *** observation has shown that women with PCOS are expected to have an increased risk of developing type 2 diabetes(T2DM)in the *** To assess the hazard ratio(HR)of T2DM between women with/without *** This population-based,retrospective cohort study evaluated data retrieved from the National Health Insurance Research *** subjects were women with PCOS(n=2545)identified on the basis of diagnosis,testing,or treatment codes,and women without PCOS as controls(n=2545).The HR of T2DM between women with or without PCOS was the main outcome measure *** Our study found that, during a 10-year follow-up period, the overall incidence of T2DM was 6.25per 1000 person-years in the PCOS group compared with 1.49 in the control group. Afteradjustment for potential confounding variables, the overall incidence of T2DM was higher in thePCOS group vs the control group (HR = 5.13, 95%CI: 3.51-7.48, P ngT2DM subsequent to PCOS decreased with increasing diagnosis age: the adjusted HR was 10.4 inthe 18–24-year age group, 5.28 in the 25-29-year age group, and 4.06 in the 29-34-year age ***, no such significant association was noted in women older than 35 *** findings highlight the importance of prompting a more aggressive treatment to preventdiabetes in women diagnosed with PCOS at a young age, and, in contrast, the lessened importanceof this type of intervention in women diagnosed with PCOS at a late reproductive age.

关键词： Polycystic ovary syndrome Diabetes Incidence Hazard ratio Population-based cohort study

A 1,3-dipolar cycloaddition protocol to porphyrin- functionalized reduced graphene oxide with a push-pull motif

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2015年第3期8卷 870-886页

作者： Aijian Wang Wang Yu Zhengguo Xiao Yinglin Song Lingliang Long Marie P. Cifuentes Mark G. Humphrey chi Zhang china-Australia Joint Research Center for Functional Molecular Materials School of Chemical and Material Engineering Jiangnan University Wuxi 214122 China china-Australia Joint Research Center for Functional Molecular Materials Scientific Research Academy Jiangsu University Zhenjiang 212013 China School of Physical Science and Technology Soochow University Suzhou 215006 China Research School of chemistry Australian National University Canberra ACT0200 Australia

Reduced graphene oxide （RGO） has been covalently functionalized with porphyrin moieties by two methods： A straightforward Prato reaction （i.e. a 1,3-dipolar cycloaddition） with sarcosine and a formyl-containing porphyrin, and a stepwise method that involves a 1,3-dipolar cycloaddition to the RGO surface using 4-hydroxybenzaldehyde, followed by nucleophilic substitution with an appropriate porphyrin. The chemical bonding of porphyrins to the RGO surface has been confirmed by ultraviolet/visible absorption, fluorescence, Fourier-transform infrared, and Raman spectroscopies, X-ray powder diffraction and X-ray photoelectron specfroscop）~ transmission electron and atomic force microscopy, and thermogravimetric analysis; this chemical attachment assures efficient electron/energy transfer between RGO and the porphyrin, and affords improved optical nonlinearities compared to those of the RGO precursor and the pristine porphyrin.

关键词： porphyrin cycloaddition reduced graphene oxide nonlinear optics

Numerical simulation study on monoblock casting process of ultra-slender structural components and experimental validation

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

china Foundry 2017年第5期14卷 449-455页

作者： Xu-liang Zhang Xiu-mei chi Bo-dong Zeng Hao Sun Jia-yun chen Xian-fei Wang Shanghai Spaceflight Precision Machinery Institute Shanghai 201600China

Substrate, a typical ultra-slender aluminum alloy structural components with a large aspect ratio and complex internal structure, was traditionally manufactured by re-assembly and sub-welding. In order to realize the monoblock casting of the substrate, the Pro/E software was utilized to carry out three-dimensional(3D) modeling of the substrate casting, and the filling and solidification processes were calculated, as well as the location and types of casting defects were predicted by the casting simulation software Anycasting. Results of the filling process simulation show that the metal liquid is distributed into each gap runner evenly and smoothly. There is no serious vortex phenomenon in the mold cavity, and the trajectory of the virtual particles is clear. Results of the solidification process simulation show that shrinkage cavities mainly appear at the junction of gap runners and the rail surface of the substrate. The average deformation is 0.6 mm in X direction, 3.8 mm in Y direction, and 8.2 mm in Z direction. Based on the simulation results, the casting process of the substrate was optimized, and qualified castings were successfully produced, which will provide a reference for the casting process design of other ultraslender aluminum alloy structural components.

关键词： aluminum alloy structural component numerical simulation defect prediction

烤烟品种NC55在黑龙江省烟区的适应性研究

在线全文

学校读者我要写书评

暂无评论

现代农业科技 2024年第5期 33-36,46页

作者：宋振威崔海志颜培强迟鹏李莹王鹏黑龙江八一农垦大学黑龙江大庆163319 黑龙江省烟草公司哈尔滨烟叶公司黑龙江哈尔滨150001 农业农村部东北平原农业绿色低碳重点实验室黑龙江大庆163319

为明确NC55烤烟在黑龙江省烟区的适应性,以当地主栽品种龙江911为对照,2018—2020年连续3年对NC55的生长发育、产量、品质和致香成分变化进行了研究。结果表明:NC55在伸根期和旺长期株高与龙江911之间无显著差异,2019年高于龙江911;201... 详细信息

为明确NC55烤烟在黑龙江省烟区的适应性,以当地主栽品种龙江911为对照,2018—2020年连续3年对NC55的生长发育、产量、品质和致香成分变化进行了研究。结果表明:NC55在伸根期和旺长期株高与龙江911之间无显著差异,2019年高于龙江911;2018年和2019年NC55叶长与龙江911之间无显著差异,2019年叶宽在旺长期显著高于龙江911;与龙江911相比,NC55产量差异不显著,上等烟和中等烟比例显著提高;NC55与龙江911相比能够显著降低烟叶内总糖、氯离子和还原糖含量,提高烟叶外观质量和感官质量,显著增加叶黄素降解产物和新植二烯两种致香成分含量。综合分析认为,NC55在黑龙江省烟区具有较好的适应性。

关键词：烤烟 NC55 致香物质质量株高产量黑龙江省

维普期刊数据库博看期刊

Paradigm Shift of Japan＇s Monetary Policymaking： Implications of Abe Shinzo＇s Return to Power

在线全文

学校读者我要写书评

暂无评论

International Relations and Diplomacy 2014年第4期2卷 259-270页

作者： Victor chi Ming chAN Hang Seng Management College Hong Kong SAR China

The paper begins with reviewing the monetary policymaking of Japan since mid-1990s. The ＂Big Bang＂ reforms in 1996-1997 had developed the foundations of financial restructuring in both private and public sectors. More importantly, under the 1998 Bank of Japan （BOJ） Law, BOJ successfully earned an independence status to formulate ＂politically neutral＂ monetary policies but encountered political pressures from politicians and Ministry of Finance （MOF） bureaucrats. Then, the paper explores how the second Abe administration has forced BOJ to accommodate its financial agenda--boost economic growth and fight against deflation - in order to gain political interests but hurt BOJ independence. The paper proceeds to explain the conflict between politicians and appointed technocrats as an institutional game under government ch.nge. The paper concludes that Abe Shinzo handled the rivalry properly by acting aggressively on both economic and strategic issues and brought a significant electoral success of the Liberal Democratic Party＇s （LDP＇s） in the 2013 upper house election.

关键词： Abenomics Bank of Japan (BOJ) monetary policymaking Liberal Democratic Party (LDP) quantity easing

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

基于人工智能的大数据网络安全解决方案

计算机应用文摘 2024年第2期40卷 93-95页

作者：池泽娟重庆市合川区不动产登记事务中心重庆401520

随着大数据技术的飞速发展,越来越多的组织和企业将大数据应用于业务中,旨在促进经济的快速增长和创新。然而,大数据的广泛应用伴随着网络威胁的增加,传统的网络安全方法已无法抵御日益复杂且多变的网络攻击。为了应对这一挑战,文章将... 详细信息

随着大数据技术的飞速发展,越来越多的组织和企业将大数据应用于业务中,旨在促进经济的快速增长和创新。然而,大数据的广泛应用伴随着网络威胁的增加,传统的网络安全方法已无法抵御日益复杂且多变的网络攻击。为了应对这一挑战,文章将研究如何利用人工智能来增强大数据环境的网络安全性。其中,将分析人工智能在大数据网络安全中的应用,并介绍基于人工智能的解决方案,旨在提高大数据环境下的网络安全性。

关键词：人工智能大数据网络安全

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

空间导航参考系研究进展

空军航空医学 2024年第2期41卷 150-154页

作者：常琳丽白婉麒王会会张彦海迟丽屹空军军医大学空军第九八六医院神经内科西安710001 陕西中医药大学第二临床医学院咸阳712000 空军军医大学空军第九八六医院第一门诊部西安710001

空间导航是基于自身位置和外在环境构建复杂的认知地图,从而实现正确导航的过程。人类将同种异体中心和自我中心2种不同的参考系相结合,进行路线规划,导航到正确的目的地。空间导航能力与飞行安全密切相关,近几十年来国内外空军一直在... 详细信息

空间导航是基于自身位置和外在环境构建复杂的认知地图,从而实现正确导航的过程。人类将同种异体中心和自我中心2种不同的参考系相结合,进行路线规划,导航到正确的目的地。空间导航能力与飞行安全密切相关,近几十年来国内外空军一直在对飞行空间定向障碍进行研究和实践,但至今因飞行空间定向障碍造成的严重飞行事故仍然非常严重,也是A级飞行事故的主要原因。笔者综述不同空间导航参考系相关脑区的激活信息以及空间参考系在导航中的作用,从而探究人类导航与空间参考系之间的关系。基于现有研究,使用合适手段,如静息态功能磁共振等,对脑区激活和信息传导进行进一步研究,可以为选择合适的人群从事飞行等空间导航相关工作提供依据,对为飞行员制定个性化的空间导航能力训练方案具有现实意义。

关键词：空间导航空间参考系同种异体中心自我中心