检索结果-南通市图书馆

中华高血压杂志 2018年第6期26卷 598-598页

作者： Yong F Heiss G Couper D meyer ml Cheng S Tanaka H 陈云叶鹏

中心收缩压和脉压是脑和肾脏小血管病的危险性标志物。但在人群研究中这些标志物在多大程度上是可重复的尚不清楚。本研究估算中心收缩压和脉压的短期可重复性,并与外周血压的相关测量进行比较。

关键词：血压测量可重复性动脉粥样硬化危险性社区人群研究标志物收缩压

中心和外周动脉脉搏波传导速度测量的重复性:社区动脉粥样硬化风险研究

在线全文

学校读者我要写书评

暂无评论

中华高血压杂志 2016年第5期24卷 498-498页

作者： meyer ml Tanaka H Palta P Patel MD Camplain R Couper D Cheng S Al Qunaibet A Poon AK Heiss G 陈云叶鹏

通过脉搏波传导速度（pulsewavevelocity，PwV）检测动脉硬化程度是当前对高血压和心血管病风险评估和分层所日渐常用的方式。颈股动脉脉搏波传导速度（catroidfemoralarteryPWV，cfPWV）是一项公认的测定中心动脉硬化程度的方式。

关键词：脉搏波传导速度风险评估动脉粥样硬化动脉脉搏波速度测量重复性社区动脉硬化

Ice Induced Low Temperature Fatigue Crack Propagation in Offshore Structural Steel A131

在线全文

学校读者我要写书评

暂无评论

China Ocean Engineering 1998年第3期13卷 275-284页

作者： Duan, ml Gao, ZJ Liu, CT China Classificat Soc Beijing 100006 Peoples R China Chinese Acad Sci Inst Mech Beijing 100080 Peoples R China

To investigate the low temperature fatigue crack propagation behavior of offshore structural steel A131 under random ice loading, three ice failure modes that are commonly present in the Bohai Gulf are simulated according to the vibration stress responses induced by real ice loading. The test data are processed by a universal software FCPUSL developed on the basis of the theory of fatigue crack propagation and statistics. The fundamental parameter controlling the fatigue crack propagation induced by random ice loading is determined to be the amplitude root mean square stress intensity factor K-arm. The test results are presented on the crack propagation diagram where the crack growth rate da/dN is described as the function of K-arm. It is evident that the ice failure modes have great influence on the fatigue crack propagation behavior of the steel in ice-induced vibration. However, some of the experimental phenomena and test results are hard to be physically explained at present. The work in this paper is an initial attempt to investigate the cause of collapse of offshore structures due to ice loading.

关键词： low temperature fatigue crack propagation offshore structure steel A131 ice load random vibration

Molecular Weight Characterization of Partially Hydrolyzed Polyacrylamide in the Complex Salts Solution

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 1997年第1期8卷 73-74页

作者： Ye, ml Han, D Shi, LH ACAD SINICA INST CHEMPOLYMER PHYS LABBEIJING 100080PEOPLES R CHINA

The effects of the nature of salts, salt concentration, pH value, degree of hydrolysis as well as surfactant on molecular size of HPAM were studied. It is found that [eta] of HPAM changes with all the above variables, and the molecular weight of HPAM can be obtained through [eta] measurement at a specific salts environment in which the [eta] is independent of above factors.

关键词： Molecular Weight Characterization of Partially Hydrolyzed Polyacrylamide in the Complex Salts Solution

A New Triterpenoid Saponin from Aralia subcapitata

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2000年第10期11卷 913-914页

作者： Zou, ml Sang, SM Xia, ZH Lao, AN Chinese Acad Sci Shanghai Inst Mat Med Shanghai 200031 Peoples R China

A new oleanane-type saponin, named subcapitatoside A, has been isolated from the roots of Aralia subcapitata. On the basis of chemical and spectral evidence: the structure of subcapitatoside A has been established as:... 详细信息

关键词： Aralia subcapitat oleanane-type saponin subcapitatoside A

Impact of asialoglycoprotein receptor deficiency on the development of liver injury

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2009年第10期15卷 1194-1200页

作者： Serene ml Lee Carol A Casey Benita L McVicker Departments of Internal Medicine and Biochemistry & Molecular Biology University of Nebraska Medical Center Omaha NE 68105 United States Liver Study Unit Department of Veterans Affairs Medical Center and Departments of Internal Medicine and Biochemistry & Molecular Biology University of Nebraska Medical Center Omaha NE 68105 United States

The asialoglycoprotein （ASGP） receptor is a wellcharacterized hepatic receptor that is recycled via the common cellular process of receptor-mediated endocytosis （RME）. The RME process plays an integral part in the proper trafficking and routing of receptors and ligands in the healthy cell. Thus, the missorting or altered transport of proteins during RME is thought to play a role in several diseases associated with hepatocyte and liver dysfunction. Previously, we examined in detail alterations that occur in hepatocellular RME and associated receptor functions as a result of one particular liver injury, alcoholic liver disease （ALD）. The studies revealed profound ethanol- mediated impairments to the ASGP receptor and the RME process, indicating the importance of this receptor and the maintenance of proper endocytic events in normal tissue. To further clarify these observations, studies were performed utilizing knockout mice （lacking a functional ASGP receptor） to which were administered several liver toxicants. In addition to alcohol, we examined the effects following administration of anti- Fas （CD95） antibody, carbon tetrachloride （CCh） and lipopolysaccharide （LPS）/galactosamine. The results of these studies demonstrated that the knockout mice sustained enhanced liver injury in response to all of the treatments, as shown by increased indices of liver damage, such as enhancement of serum enzyme levels, histopathological scores, as well as hepatocellular death. Overall, the work completed to date suggests a possible link between hepatic receptors and liver injury. In particular, adequate function and content of the ASGP receptor may provide protection against various toxinmediated liver diseases.

关键词： Asialoglycoprotein receptor Asialoglycoproteinreceptor deficient mice Receptor-mediatedendocytosis Alcohol Carbon tetrachloride Anti-Fas Lipopolysaccharide/galactosamine Toxicant-induced liverinjury

Isolation of osRACD gene encoding a small GTP-binding protein from rice

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 Science Bulletin 2002年第20期47卷 1673-1679页

作者： ml Zhiyong WANG Shusheng WU Naihu Institute of Developmental Biology Chinese Academy of SciencesBeijing 100080China Academy of Life Sciences Peking UniversityBeijing 100871China

Using an improved version of mRNA differential display technology, we have obtained a differentially displayed fragment RDP-8. Homologous comparison indicated that the fragment RDP-8 has high homology with the gene encoding maize small GTP-binding protein. By screening cDNA library of the rice Nongken 58N panicle using the newly obtained fragment RDP-8 as probe, we further found the full-length cDNA of osRACD gene that encodes a rice small GTP-binding protein. As compared with maize RACD gene, the osRACD of rice shows remarkable homology in both nucleotide sequence and amino acid sequence, 88% and 97% respectively. Evidence from RT-PCR study indicates that osRACD gene is related to photoperiod fertility conversion of photoperiod sensitive genie male sterility (PSGMS) rice.

关键词： rice osRACD mRNA differential display light signal transduction.

Broadband antireflection coatings deposited by magnetron sputtering

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 1997年第19期42卷 1612-1615页

作者： Wang, ml Gong, H Fan, ZX Optical Coating Center Shanghai Institute of Optic and Fine Machine Chinese Academy of Sciences Shanghai China

IN 1938, antireflection coatings were prepared by Americans. Later, they were successfullygot by Europeans. The antireflection coatings are very important in optical films, and used inmost optical instruments such as photograph eyes, glasses, telescopes and microscopes. Atpresent, the technology of preparing antireflection is perfect. Especially, with the help ofcomputer, multi-antireflection coating can be constructed easily. Resistance heating

关键词： magnetron sputtering broadband antireflection deposition.

An approach to noble-gas isotopic compositions in natural gases and gas-source tracing in the Ordos Basin,China

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 2002年第6期47卷 489-493页

作者： Liu, WH Sun, ml Xu, YC Chinese Acad Sci Lanzhou Inst Geol State Key Lab Gas Geochem Lanzhou 730000 Peoples R China

Isotopic compositions of noble gases, i.e. He Ar Kr and Xe, are measured in natural gases from the Zhongbu gasfield in the Ordos Basin. And heavy noble-gas isotopes (Kr, Xe) are here first used in geochemically studying natural gases and gas-source correlation. Isotopic compositions of heavy noble gases in natural gases, especially Xe, show two-source mixing in the Zhongbu gasfield. Gas sources are somewhat different in the northeast and the southwest of the gasfield. Generally, the gas source of the Lower Paleozoic makes a greater contribution in the southwest than in the northeast in the field. Two kinds of gases can be differentiated from isotopic compositions of heavy noble gases and from their relation with the Ar isotopic composition. Therefore, the comprehensive study on isotopic compositions of light and heavy noble gases can supply more useful information on gas-source correlation and tracing.

关键词： noble gas Kr Xe isotope natural gas gas-source corre-lation.

An Ensemble Methods for Medical Insurance Costs Prediction Task

在线全文

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2022年第2期70卷 3969-3984页

作者： Nataliya Shakhovska Nataliia Melnykova Valentyna Chopiyak Michal Gregus ml Department of Artificial Intelligence Lviv Polytechnic National UniversityLviv79013Ukraine Department of Clinical Immunology and Allergology Danylo Halytsky Lviv National Medical UniversityLviv79010Ukraine Faculty of Management Comenius UniversityBratislava81499Slovakia

The paper reports three new ensembles of supervised learning predictors for managing medical insurance *** open dataset is used for data analysis methods *** usage of artificial intelligence in the management of financial risks will facilitate economic wear time and money and protect patients’*** learning is associated withmany expectations,but its quality is determined by choosing a good algorithm and the proper steps to plan,develop,and implement the *** paper aims to develop three new ensembles for individual insurance costs prediction to provide high prediction *** coefficient and Boruta algorithm are used for feature *** boosting,stacking,and bagging ensembles are built.A comparison with existing machine learning algorithms is *** modes based on regression tree and stochastic gradient descent is *** CART and Random Forest algorithms are *** boosting and stacking ensembles shown better accuracy than *** tuning parameters for boosting do not allow to decrease the RMSE ***,bagging shows its weakness in generalizing the *** stacking is developed using K Nearest Neighbors(KNN),Support Vector Machine(SVM),Regression Tree,Linear Regression,Stochastic Gradient *** random forest(RF)algorithm is used to combine the *** hundred trees are built *** Square Error(RMSE)has lifted the to 3173.213 in comparison with other *** quality of the developed ensemble for RootMean Squared Error metric is 1.47 better than for the best weak predictor(SVR).

关键词： Healthcare medical insurance prediction task machine learning ensemble data analysis