oalib
匹配条件: “” ,找到相关结果约76条。
列表显示的所有文章,均可免费获取
第1页/共76条
每页显示
Building Predictive Models in R Using the caret Package  [PDF]
Max Kuhn
Journal of Statistical Software , 2008,
Abstract: The caret package, short for classification and regression training, contains numerous tools for developing predictive models using the rich set of models available in R. The package focuses on simplifying model training and tuning across a wide variety of modeling techniques. It also includes methods for pre-processing training data, calculating variable importance, and model visualizations. An example from computational chemistry is used to illustrate the functionality on a real data set and to benchmark the benefits of parallel processing with several types of models.
Tangent ray diffraction and the Pekeris caret function  [PDF]
David Peter Hewett
Mathematics , 2014,
Abstract: We study the classical problem of high frequency scattering of an incident plane wave by a smooth convex two-dimensional body. We present a new integral representation of the leading order solution in the "Fock region", i.e. the neighbourhood of a point of tangency between the incident rays and the scatterer boundary, from which the penumbra (light-shadow boundary) effects originate. The new representation, which is equivalent to the classical Fourier integral representation and its well-studied "forked contour" regularisation, reveals that the Pekeris caret function (sometimes referred to as a "Fock-type integral" or a "Fock scattering function"), a special function already known to describe the field in the penumbra, is also an intrinsic part of the solution in the inner Fock region. We also provide the correct interpretation of a divergent integral arising in the analysis of Tew et al. (Wave Motion 32, 2000), enabling the results of that paper to be used for quantitative calculations.
The Novartis-ILAR Rheumatology Prize 2001 Osteoarthritis: from molecule to man
Jean-Pierre Pelletier, Johanne Martel-Pelletier
Arthritis Research & Therapy , 2001, DOI: 10.1186/ar378
Abstract: The Novartis-ILAR Rheumatology Prize was awarded at the 20th ILAR Congress of Rheumatology in Edmonton, Canada in August 2001. The Editors-in-Chief would like to inform readers that this Commentary has not undergone peer-review, because it is based upon the acceptance speech for the Prize.In our work on osteoarthritis, we identified several enzymatic pathways that are intimately related to the development of this disease. More specifically, we demonstrated that, although the matrix metalloprotease (MMP) family is of pivotal importance in the degradation of osteoarthritic cartilage [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26] (Fig. 1), the serine- and cysteine-dependent proteases [27,28,29,30] also play a significant role. We were among the first to introduce and demonstrate the importance of an imbalance in enzymes and their specific inhibitors (tissue inhibitor of MMP, cathepsin B-inhibitors and plasminogen activator/plasmin/plasminogen activator inhibitor-1) in osteoarthritic tissues. This concept is now well recognized as an intimate element in the pathogenesis of osteoarthritis.In recent years, we have been involved in the discovery of a new collagenase, collagenase-3 (MMP-13), in cartilage and demonstrated its involvement in the osteoarthritis disease process [18]. We were also the first group to clone human collagenase-3 promoter, more specifically its 5' flanking region (GenBank #U52692) [20]. From the work undertaken in our laboratory, we have come to the hypothesis that collagenase-3, in contrast to collagenase-1 (MMP-1), is involved in the remodeling phase of osteoarthritic cartilage [21,22,23,24,26]. Moreover, we also found that, although many cytokines and factors can upregulate collagenase-3, transforming growth factor (TGF)-β appears to be the factor responsible for its upregulation in vivo in osteoarthritic cartilage [21,24,26].Altogether, these findings have proven to be of utmost importance, as some pharmaceutical companies
尖脊(caret)进气道地面气动特性试验研究  [PDF]
钟易成?,余少志?,陈晓?
推进技术 , 2000,
Abstract: 在地面静止状态下试验研究了尖脊进气道气动特性以及唇口厚度对进气道性能影响,给出了进气道各侧壁沿程静压分布及其出口总压分布图谱,研究了进气口流动特点及其对出口总压畸变流场的影响。试验表明,caret进气道进口存在一大一小的反向旋转涡,该旋涡的作用使得进气道高、低压区均旋转了90°以上。进口下唇口和外唇口厚度对地面静止状态下的进气道总压恢复系数和总压畸变指数有较大的影响,为进气唇口厚度的选择提供了依据。
THE LAST REPRESENTATIVES OF PROFESSIONS ON THE BRINK OF EXTINCTION IN MUSTAFAKEMALPA A MUSTAFAKEMALPA A’DAKAYBOLMAYA BA LAMI MESLEKLER N SON TEMS LC LER  [PDF]
Hülya TA?
Turkish Studies , 2012,
Abstract: Bir toplumun kültürünün ara t r lmas o ülke insan n ve toplumu tan man n temel unsurlar ndand r. 2003 y l nda UNESCO taraf ndan kabul edilen “Somut olmayan kültürel miras n korunmas ” s zle mesinde UNESCO’nun korunmas n istedi i halk kültürü alanlar ndan biri de “El Sanatlar Gelene i” dir. Teknolojinin h zla geli mesinden dolay toplumsal de er ve kültürel yap lar da h zla de i mektedir. Geleneksel meslekler, her türlü zorlu a kar koymaya al an ve rak bulamayan son ustalar n elindedir. Amac m z sahip oldu umuz kültürel zenginli i gelecek ku aklara aktarabilmektir. al mam zda Bursa’ya ba l Mustafakemalpa a il esinde yok olmaya ba layan protezcilik, sara c l k, has rc l k, mlek ilik mesleklerinin son temsilcilerine yer verilmi tir. Bursa, Mustafakemalpa a, geleneksel el sanatlar , geleneksel meslekler AOne of the main principles in recognizing the people of a country and their community is to look into their culture. One of the popular culture activities that UNESCO wanted to protect within the scope of the “Preservance of the intangible cultural heritage” contract is the “Hand Crafts Tradition”. The social values and cultural structures are rapidly changing parallel with the technological advances. The traditional professions are now held by the last master craftsmen fighting against all difficulties and having trouble finding apprentices. Our aim is to be able to transfer our cultural wealth to the next generations. In our study we have focused on the almost extinct occupations like prosthetics, saddlery, matting and pottery.
f/a-18e/f飞机发动机的caret进气道  [PDF]
杨国才?
推进技术 , 1997,
Abstract: 介绍了与f/a-18e/f飞机发动机提高性能相适应的、设计ma=2.0的固定几何的“caret”进气道的设计,分析了新设计的e/f进气道性能和机体/进气道一体化的模型风洞试验结果。该进气道新概念设计对我国在研或预研的某些机种都有较好的参考与借鉴价值。
Incidence of musculoskeletal pain in adult Kuwaitis using the validated Arabic version of the WHO-ILAR COPCORD core questionnaire.  [cached]
Al-Awadhi Adel,Olusi Samuel,Al-Saeid Khaled,Moussa Mohamed
Annals of Saudi Medicine , 2005,
Abstract: Background: The WHO-ILAR Community Oriented Program for Control of Rheumatic Diseases (COPCORD) primarily aims to estimate the burden of musculoskeletal symptoms/disorders. We estimated the incidence of musculoskeletal pain in the first community-based COPCORD study in Kuwait. Subjects and Methods: The validated Arabic version of the WHOILAR COPCORD Core Questionnaire was used in a survey of 2500 randomly selected Kuwaiti households to assess the frequency of musculoskeletal pain, disability, and health-seeking behavior in adult Kuwaitis. Those subjects reporting no musculoskeletal pain were identified and followed-up for a period of one year by contacting them every 2 weeks. Once a respondent reported pain, an appointment to report to hospital was offered and the subject was examined by a rheumatologist using American College of Rheumatology (ACR) criteria. Results: Of 5159 adults who were non-complainers in an earlier prevalence phase of the study, 3341 responded to phone calls (response rate of 65%). The incidence of musculoskeletal pain was 6.6% (95%CI, 3.4%- 9.7%). Age- and sex-adjusted incidence rates were 7.2% (95%CI, 3.4%- 10.5%) for females and 6.1% (95%CI, 3.1%-9.2%) for males. The incidence rate increased with increasing age, body mass index, and with being married. The common sites of pain were knee, low back and shoulder. Conclusion: The incidence of musculoskeletal pain among Kuwaiti adults is reported for the first time. Further studies adopting the same instrument in other communities are warranted to compare with our findings.
“SAYALAR” AND “SAYA ILAR” IN IRAN AZERBAIJAN (URMIYE) RAN AZERBAYCANI’NDA (URM YE’DE) “SAYALAR” VE “SAYA ILAR”  [PDF]
Talip DO?AN
Turkish Studies , 2011,
Abstract: Urmiye is the most important centre of Iran Azerbaijan. Turks livingin Urmiye substantially come from Av ars of Oghuz Tribe. The origin ofSaya tradition handled in the framework of village observation games inthe region stands up to antique abundance ceremonies of Turks andanimism beliefs. Saya ceremonies that come across the time when theduration of ship’s pregnancy is about a hundred have been known by themajority of Turkish world and changed from region to region and theyhave been performed enthusiastically with some stereotyped behavioursand clothes.Language saves the culture built as a result of thousands ofexperiences for ages, it moves the culture to these days and transfers tothe future. In this respect, it is available to find all the abstract andconcrete cultural elements in the language, in other words, in the verbalculture transferred from generation to generation. Verbal history which is the source of narratives based on the memories of living persons developsin the verbal culture environment. In this paper, the “sayalar” and“saya lar” observed on Turks in Urmiye region have been put forward bya compile text and in the context of verbal culture/history. Urmiye, ran Azerbaycan ’n n nemli merkezlerindendir. Bub lgedeki Türk varl n , büyük oranda, O uz boylar ndan Av arlar te kileder. B lgedeki k y seyirlik oyunlar er evesinde ele al nan sayagelene inin men ei, Türklerin eski bolluk t renlerine ve animizm(canl c l k) inan lar na dayan r. Kuzular n, gebe koyunlar n karn nda yüzgün oldu u zamana rast gelen saya t renleri, bugün de Türk dünyas n nbüyük bir b lümünde halk taraf ndan bilinmekte ve b lgeden b lgeyede i mekle beraber belirli günlerde baz kal pla m davran vek yafetlerle co ku i inde icra edilmektedir.Dil, as rlar boyunca binbir tecrübe neticesinde in a edilen kültürü,muhafaza ederek bugünlere ta makla birlikte gelece e de aktar r. Buitibarla, her türlü soyut ve somut kültürel unsuru dilde, ba ka birdeyi le, nesilden nesile devredilen s zlü kültür ortam nda bulmakmümkündür. Ya ayan fertlerin belle ine dayal anlat lar n kaynakl ketti i s zlü tarih ise s zlü kültür ortam nda olu ur. Bu yaz da, Urmiyeb lgesindeki Türklerde tespit edilen saya gelene i, s zlü kültür/tarihba lam nda ve derlenmi bir metin er evesinde sunulmaktad r.
Risk factors of knee osteoarthritis, WHO-ILAR-COPCORD study
Dahaghin S,Tehrani-Banihashemi SA,Frouzanfar MH,Barghamdi M
Tehran University Medical Journal , 2009,
Abstract: "nBackground: To evaluate the association between age, sex, BMI, waist/hip ratio, smoking, religion, ethnicity, education and knee osteoarthritis. "nMethods: Eligible subjects were randomly included from participants of Tehran COPCORD study, of whom 480 subjects with knee osteoarthritis were compared to 490 subjects without (case-control study). Using a questionnaire developed by COPCORD group (Asia & Oceania), we enquired about the risk factors of knee osteoarthritis i.e. age, sex, BMI, Waist/Hip ratio, religion, ethnicity, education and smoking. Knee osteoarthritis was defined using ACR criteria. Each knee was unit of analysis using GEE technique to evaluate these associations. "nResults: Age (OR; 1.096; CI95%: 1.091-1.1; P: 0.00) and sex (OR; 2.85; CI95%: 2.49-3.28; P: 0.00) showed significant association with knee osteoarthritis. Overweight (OR; 1.81; CI95%: 1.28-2.55; P: 0.00) and obesity (OR; 3.3; CI95%: 2.34-4.66; P: 0.00) both showed higher risk for knee osteoarthritis. The association between waist/hip ratio and knee osteoarthritis showed an OR of 5.28, CI95%: 0.89-31.44; P: 0.07. However, this association was only borderline significant. People with different religion or ethnicity and smokers had no extra risks for knee osteoarthritis. Higher education is a protective factor for knee osteoarthritis as people who had university education compared to people with no/primary education showed a lower risk for knee osteoarthritis (OR; 0.54; CI95%: 0.38-0.78; P: 0.00). "nConclusions: Our study confirmed that elderly, females, overweight and obese people are at higher risk to develop knee osteoarthritis as found in western societies. Higher education is a protective factor against knee osteoarthritis. Ethnicity, religion and smoking showed no extra risk of knee osteoarthritis.
KASTAMONU'DA 19. YüZYIL T CARET YAPILARI  [PDF]
Kutgün EYüPG?LLER,Mine TOP?UBA?I,I??l POLAT
Middle East Technical University Journal of the Faculty of Architecture , 2008,
Abstract:
第1页/共76条
每页显示


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.