检索结果-南通市图书馆

农业科技译丛（湖南） 1989年第2期18卷 77-80页

作者： wells.,r 陈金湘

Assessing 10-year coronary heart disease risk in people with Type 2 diabetes mellitus: Framingham versus United Kingdom prospective Diabetes Study

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Diabetes Mellitus 2014年第1期4卷 12-18页

作者： patricia A. Metcalf Susan wells rod T. Jackson Division of Epidemiology and Biostatistics School of Population Health University of Auckland Auckland New Zealand

Aims: previous studies have suggested that the Framingham coronary heart disease risk prediction equation underestimates risk among people with Type 2 diabetes. We compared the 10-year absolute risks of coronary heart disease (CHD) using a Framingham equation and a United Kingdom prospective Diabetes Study (UKpDS) equation in adults with Type 2 diabetes. Methods: participants were from a cross-sectional survey of a randomly selected population. There were 461 people with newly (n = 132) or previously diagnosed (n = 329) diabetes aged 35 to 74 years with no past history of cardiovascular disease or nephropathy. We examined predicted 10-year CHD risk by age, gender, and newly or previously diagnosed diabetes. results: Overall the mean 10-year CHD risks predicted by the two equations were similar. Among men, the UKpDS and Framingham scores were almost identical below 60 years of age but at older ages, the UKpDS score was 4% - 11% higher than Framingham. For women, the Framingham score was higher than the UKpDS score between ages 40 and 65 years, but the UKpDS score was about 4% - 5% higher for women aged 70 years and over. The UKpDS equation tended to give higher risk estimates in people with a predicted 10-year Framingham CHD risk above 15%. Conclusion: Framingham CHD risk scores tended to be lower than UKpDS scores primarily in people above standard thresholds for drug treatment, so the clinical impact of underestimating risk is likely to be limited. Moreover, the UKpDS equation predicted lower risks than Framingham for women and newly diagnosed diabetes at otherwise low to moderate CHD risk, which could result in later initiation of therapy in these groups if the UKpDS score was used instead of the Framingham score.

关键词： Framingham UKpDS risk Assessment Equations Diabetes Heart Disease

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Days of the Comet

Days of the Comet

Adiposity and spinal cord injury

作者： H.G.wells

来源：南通市图书馆图书评论

学校读者我要写书评

暂无评论

World Journal of Orthopedics 2015年第8期6卷 567-576页

作者： Ashraf S Gorgey Kathryn M wells Timothy L Austin Spinal Cord Injury and Disorder Service Hunter Holmes Mc Guire VA Medical Center Department of physical Medicine and rehabilitation Virginia Commonwealth University College of Health and Human performance Virginia Commonwealth University

The drastic changes in body composition following spinal cord injury(SCI) have been shown to play a significant role in cardiovascular and metabolic health. The pattern of storage and distribution of different types of adipose tissue may impact metabolic health variables similar to carbohydrate, lipid and bone metabolism. The use of magnetic resonance imaging provides insights on the interplay among different regional adipose tissue compartments and their role in developing chronic diseases. regional adipose tissue can be either distributed centrally or peripherally into subcutaneous and ectopic sites. The primary ectopic adipose tissue sites are visceral, intramuscular and bone marrow. Dysfunction in the central nervous system following SCI impacts the pattern of distribution of adiposity especially between tetraplegia and paraplegia. The current editorial is focused primarily on introducing different types of adipose tissue and establishing scientific basis to develop appropriate dietary, rehabilitation or pharmaceutical interventions to manage the negative consequences of increasing adiposity after SCI. We have also summarized the clinical implications and future recommendations relevant to study adiposity after SCI.

关键词： Adiposity Magnetic resonance imaging Dual-energy X-ray absorptiometry Ectopic adiposity Visceral and subcutaneous adiposity Intramuscular fat Spinal cord injury

penetrating Trauma resulting in Ventricular Septal Defect

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 Cardiovascular Surgery 2014年第5期4卷 77-80页

作者： Daniel Juneau Daniel Hermann Gretchen L. wells Wake Forest School of Medicine Department of Internal Medicine Section on Cardiology Winston-Salem USA

Most ventricular septal defects (VSDs) are congenital. Acquired VSDs are generally due to myocardial infarction. An unusual case of VSD from penetrating trauma is described. In this case, the lack of a hemopericardium at presentation led the treatment team not to pursue cardiac pathology. Once the patient developed heart failure, the diagnosis of a VSD was made. patients with penetrating chest wounds should undergo echocardiography, as such lesions may not be detected by physical examination or chest exploration.

关键词： Ventricular Septal Defect penetrating Trauma Echocardiography

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Accents of English

Accents of English

Deformation behavior and constitutive model for dual-phase Mg-Li alloy at elevated temperatures

1982年

作者： John C. wells

The first comprehensive study of how English is pronounced by different people in different places. It provides an integrated and unified framework for existing scholarly treatments of regional forms of speech and mak...

ISBN: (纸本)9780521246484

关键词：

来源：畅想之星图书光盘版（南... 评论

在线全文

畅想之星图书光盘版（南通市图书馆镜像）

学校读者我要写书评

暂无评论

作者： H.G.wells

学校读者我要写书评

暂无评论

Transactions of Nonferrous Metals Society of China 2016年第2期26卷 508-518页

作者：魏国兵彭晓东胡发平 Amir HADADZADEH 杨艳谢卫东 Mary A.wells 重庆大学材料科学与工程学院重庆400044 Mechanical and Mechatronics Engineering Department University of Waterloo

In order to study the deformation behavior and evaluate the workability of the dual-phase Mg-9Li-3Al-2Sr alloy, isothermal hot compression tests were conducted using the Gleeble-3500 thermal-mechanical simulator, in ranges of elevated temperatures （423-573 K） and strain rates （0.001-1 s^-1）. plastic instability is evident during the deformation which is in the form of serrated flow; serrated yielding is attributed to the locking of mobile dislocations by the Mg and Li atoms which diffuse during the deformation. The relationships between flow stress, strain rate and deformation temperature were analyzed and the deformation activation energy and some basic material factors at different strains were calculated using the Arrhenius equation. The effects of temperature and strain rate on deformation behavior were represented using the Zener–Hollomon parameter in an exponent-type equation. To verify the validity of the constitutive model, the predicted values and experimental flow curves under different deformation conditions were compared, the correlation coefficient （0.9970） and average absolute relative error （AArE=4.41%） were calculated. The results indicate that the constitutive model can be used to accurately predict the flow behavior of dual-phase Mg-9Li-3Al-2Sr alloy during high temperature deformation.

关键词： constitutive model Mg-Li alloy plastic instability Zener-Hollomon parameter

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

土壤阻力连续测试系统农田试验研究

农机化研究 2012年第8期34卷 111-115页

作者：赵新罗锡文 L.G.wells 华南农业大学南方农业机械与装备关键技术省部共建教育部重点实验室广州510642 美国肯塔基大学生物与农业工程系列克星敦40546

土壤阻力连续测试系统可连续获取农田压实的土壤阻力信息。为研究土壤阻力连续测试系统测试土壤阻力指数(TrI)的适用性,安排了小区对比、大田对比和工作速度影响3个试验,进行了土壤阻力指数TrI值与土壤圆锥指数CI值对比分析。试验结果表... 详细信息

土壤阻力连续测试系统可连续获取农田压实的土壤阻力信息。为研究土壤阻力连续测试系统测试土壤阻力指数(TrI)的适用性,安排了小区对比、大田对比和工作速度影响3个试验,进行了土壤阻力指数TrI值与土壤圆锥指数CI值对比分析。试验结果表明:在表征农田土壤压实程度上,TrI值与CI值具有一致性,即利用土壤阻力连续测量系统测取的TrI数据可以反应农田土壤的压实程度;土壤阻力连续测量系统采样连续、数据信息量大和采样效率高,适合于大面积农田土壤信息快速采集,有利于变耕深耕作技术的开展;在保证系统高效、安全和测试数据稳定的前提下,试验结果显示测试系统较理想的工作速度是1.0m/s。

关键词：土壤阻力测试信息采集土壤阻力指数土壤圆锥指数

Effect of Terrestrial LiDAr point Sampling Density in Ephemeral Gully Characterization

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Open Journal of Modern Hydrology 2013年第1期3卷 38-49页

作者： Henrique G. Momm ronald L. Bingner robert r. wells Seth M. Dabney Lyle D. Frees Department of Geosciences Middle Tennessee State University Murfreesboro USA National Sedimentation Laboratory United States Department of Agriculture—Agricultural Research Service Oxford USA United States Department of Agriculture—Natural resources Conservation Service Salina USA

Gully erosion can account for significant volumes of sediment exiting agricultural landscapes, but is difficult to monitor and quantify its evolution with traditional surveying technology. Scientific investigations of gullies depend on accurate and detailed topographic information to understand and evaluate the complex interactions between field topography and gully evolution. Detailed terrain representations can be produced by new technologies such as terrestrial LiDAr systems. These systems are capable of collecting information with a wide range of ground point sampling densities as a result of operator controlled factors. Increasing point density results in richer datasets at a cost of increased time needed to complete field surveys. In large research watersheds, with hundreds of sites being monitored, data collection can become costly and time consuming. In this study, the effect of point sampling density on the capability to collect topographic information was investigated at individual gully scale. This was performed through the utilization of semi-variograms to produce overall guiding principles for multi-temporal gully surveys based on various levels of laser sampling points and relief variation (low, moderate, and high). results indicated the existence of a point sampling density threshold that produces little or no additional topographic information when exceeded. A reduced dataset was created using the density thresholds and compared to the original dataset with no major discrepancy. Although variations in relief and soil roughness can lead to different point sampling density requirements, the outcome of this study serves as practical guidance for future field surveys of gully evolution and erosion.

关键词： Ephemeral Gully Ground-Based LiDAr Soil Erosion point Sampling Density remote Sensing