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EHD friction properties of ISO VG 320 gear oils with smooth and rough surfaces

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Friction 2020年第1期8卷 164-181页

作者： Balasubramaniam VENGUDUSAMY Claus ENEKES Reiner SPALLEK Klüber Lubrication München SE&Co.KG Geisenhausenerstraße 7Munich 81379Germany

The elastohydrodynamic(EHD)friction properties of seven ISO VG 320 gear oils including three polyalphaolefins(PAOs),three polyglycols(PG)and a mineral oil have been investigated in rolling/sliding conditions at six different temperatures and three *** thickness,Stribeck and traction curves have been generated using a ball‐on‐disc *** thickness results are in agreement with previous work that it is primarily controlled by pressure‐viscosity coefficient and viscosity of *** results with smooth surface show that all oils experience significant shear heating leading to friction reduction at higher strain rates or lambda ratios but only PGs reach limiting friction whereas mineral oil and PAOs do *** curves obtained at different temperatures and roughnesses enable simulating an extensive range of lubrication regimes and allow isothermal friction correction for shear *** curves with rough surfaces show an increase in friction in the lambda range of 0.5–3.5,where asperity separation varies from partial to full–indicating that roughness effects can be expected even under full film *** increase in friction is attributed to formation of a micro‐EHD region,and is seen only with mineral oil and PAOs whereas not with *** results also highlight how EHD friction properties of different family of fluids could be influenced by roughness effects,and the possible mechanisms are discussed.

关键词： ISO VG 320 gear oil roughness effect film thickness friction EHD micro‐EHD

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润滑剂改善设备的使用状况

传动技术 1999年第3期13卷 1-13页

作者： KlüberLubrication MünchenKG HelmutWinkler Klǖber Lubrication Mǖnchen KG

润滑剂是提高各种机器寿命的良方，如果选用产品不考虑摩擦方面的特殊要求，在长期运转下它将不能正常工作而机器将产生故障。　　润滑剂失效不是很快发生，轴承和齿轮在其完全失效前很早就发出警告信号，然而维修保养人员往往很少认识... 详细信息

润滑剂是提高各种机器寿命的良方，如果选用产品不考虑摩擦方面的特殊要求，在长期运转下它将不能正常工作而机器将产生故障。　　润滑剂失效不是很快发生，轴承和齿轮在其完全失效前很早就发出警告信号，然而维修保养人员往往很少认识这些早期信号，而十分经常的是在损坏发生后（图１）再行研究。很多公司认为采用现代的润滑剂来改进设备的使用寿命。然而，这种方法只有维修人员具有最好的润滑剂和应用经验方可实现。在这方面他们没有让这种可能的解决方法放任自流，而是开发了专门的维修策略。所有公司一直认为润滑剂仅仅是一种辅助手段，本文以下实例将说明在各种设备中广泛使用适当的润滑剂可改善设备的维修和保养。

关键词：润滑剂使用寿命维修保养设备机器

Multivariable Control Performance Assessment Based on Generalized Minimum Variance Benchmark

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Chinese Journal of Chemical Engineering 2010年第1期18卷 86-94页

作者：赵宇苏宏业褚健古勇 State Key Laboratory of Industrial Control Technology Institute'of Cy'ber-Systems and~Control'Zhejiang Univer-sity Hangzhou 310027 China

This paper is concerned with the control performance assessment based on the multivariable generalized minimum variance *** explicit expression for the feedback controller-invariant(the generalized minimum variance)term of the multivariable control system is obtained,which is used as a standard benchmark for the assessment of the control performance for multi input multi output(MIMO)*** proposed approach is based on the multivariable minimum variance *** comparison with the minimum variance benchmark, the developed method is more reasonable and practical for the control performance assessment of multivariable *** approach is illustrated by a simulation example and an industrial application.

关键词： control performance assessment generalized minimum variance minimum variance control multi- variable control system

为提高生产效率和生产质量采用的电子纱线自停装置

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国际纺织导报 2005年第8期33卷 12-12,14-16页

作者： R.Stüber 翁鸣 Otto Stüber公司

描述了各种用途的电子传感器。这些传感器分别用于监控短纤纱、粗纱条、单丝、复丝以及细金属丝的纺纱、加捻、络筒、并纱/络筒、梳棉、牵伸、粗纱等。在长丝工业中主要应用于拉伸卷绕、拉伸加捻和变形工艺;在织造准备中用于分批整经和... 详细信息

描述了各种用途的电子传感器。这些传感器分别用于监控短纤纱、粗纱条、单丝、复丝以及细金属丝的纺纱、加捻、络筒、并纱/络筒、梳棉、牵伸、粗纱等。在长丝工业中主要应用于拉伸卷绕、拉伸加捻和变形工艺;在织造准备中用于分批整经和分条整经;在针织工业中用于圆型针织机;此外还用于特殊纺织机械部门。这意味着电子传感器在各种需要监控纱线和单丝的场合都有实际应用。

关键词：纺纱纱线传感器效率质量

内镜下视频自动荧光成像继窄带成像技术用于诊断Barrett食管的早期瘤形成

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世界核心医学期刊文摘（胃肠病学分册） 2006年第12期2卷 36-37页

作者： Kara M.A. Peters F.P. Fockens P. J.J.G.H.M.bergman 周智勇 ber Academic Medical CenterAmsterdamNetherlands Drs ber Academic Medical CenterAmsterdamNetherlands Departments of Gastroenterology and Hepatology Dr.

Background:Video-autofluorescence imaging(AFI) and narrow band imaging(NBI) are new endoscopic techniques that may improve the detection of high-grade intraepithelial neoplasia(HGIN) in Barrett’s esophagus(BE) .AFI improves the detection of lesions but may give false-positive *** allows for detailed inspection of the mucosal and(micro) vascular patterns,which are related to ***:A proof-of-principle study to combine AFI and NBI to improve the detection of HGIN and to reduce false-positive ***:Cross-sectional study of consecutive eligible ***:***:Twenty patients with BE with suspected or endoscopically treated HGIN were investigated with 2 prototype imaging systems:AFI(inspection with high-resolution videoendoscopy and autofluorescence imaging for detection of lesions) and NBI(for detailed inspection of mucosal and vascular patterns of identified lesions) .Lesions were sampled for histopathologic *** Outcome Measurements:The positive predictive value of AFI alone and of AFI-NBI for detecting HGIN and the reduction of falsepositive findings because of the use of ***:All of the 28 lesions with HGIN were identified with *** were identified with white light(61%) .Forty-seven suspicious lesions were detected with AFI:28 contained HGIN(60%) and 19 were false positive(40%) .With NBI,25 of the true-positive lesions had definitely suspicious patterns,and 3 had dubiously suspicious *** the 19 false positives,14 were not suspicious on *** false-positive rate,therefore,was reduced from 40% to 10%.Low-grade dysplasia was found in 4 of the remaining 5 false *** of the 14 patients with HGIN were identified by AFI-NBI(sensitivity 100%) .Limitations:Uncontrolled study in high-risk ***:This proof-of-principle study confirms that AFI can be used as a red-flag technique to detect suspicious *** NBI,detailed inspection of the surface patterns can be

关键词： Barrett 窄带成像荧光成像瘤形成假阳性诊断率可疑病变上皮内瘤显像系统单中心

Simultaneously compensating tunable CD and adaptive PMD using two different nonlinearly chirped fiber Bragg gratings

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Chinese Optics Letters 2004年第8期2卷 445-448页

作者：于丽张晓光周光涛刘玉敏张建忠席丽霞杨伯君 School of Science Beijing University of Posts and Telecommunications Beijing 100876 School of Science Beijing University of Posts and Telecommunications Beijing 100876xperimental research of simultaneous tunable chromatic dispersion (CD) and adaptive polarization mode dispersion (PMD) compensations in optical fiber communication system was reported. Two different nonlinearly chirped fiber Bragg gratings fabricated through the equivalent chirp technology were adopted in the experiment. One of the gratings was used as CD compensator with a tunable dispersion range from 300 to 600 ps/nm. The other made of photosensitive polarization maintaining fiber was used as a tunable delay line of PMD compensator which provided a varying amount of differential group delay (DGD) from 40 to 110 ps. Our experiment was operated at 10-Gb/s non-return-to-zero (NRZ) system and the results showed that the eye pattern recovery is excellent after both PMD and CD are compensated. Especially the power penalty at a bit error rate (BER) of 10-9 is about 1 dB.

Experimental research of simultaneous tunable chromatic dispersion (CD) and adaptive polarization mode dispersion (PMD) compensations in optical fiber communication system was reported. Two different nonlinearly chirped fiber Bragg gratings fabricated through the equivalent chirp technology were adopted in the experiment. One of the gratings was used as CD compensator, with a tunable dispersion range from 300 to 600 ps/nm. The other made of photosensitive polarization maintaining fiber was used as a tunable delay line of PMD compensator, which provided a varying amount of differential group delay (DGD) from 40 to 110 ps. Our experiment was operated at 10-Gb/s non-return-to-zero (NRZ) system and the results showed that the eye pattern recovery is excellent after both PMD and CD are compensated. Especially, the power penalty at a bit error rate (ber) of 10-9 is about 1 dB.

关键词： Bit error rate Electromagnetic dispersion Fiber Bragg gratings

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扎哈·哈迪德建筑事务所:参数化塔楼研究

现代装饰 2012年第3期 18-19页

作者：代照 Jochen Stber Zaha Hadid Architects 德国AIT建筑沙龙

扎哈·哈迪德建筑事务所创办至今，已经走过了三十年的历程，期间在全球各地拔地而起，创作了大量独特和超前的项目。这些成就背后的学术支撑是扎哈，哈迪德女士（Zaha Hadid）与派特里克·舒马赫博士（Patrik Schumacher）令人印象深... 详细信息

扎哈·哈迪德建筑事务所创办至今，已经走过了三十年的历程，期间在全球各地拔地而起，创作了大量独特和超前的项目。这些成就背后的学术支撑是扎哈，哈迪德女士（Zaha Hadid）与派特里克·舒马赫博士（Patrik Schumacher）令人印象深刻的建筑理论工作。

关键词：建筑事务所哈迪德参数化塔楼建筑理论支撑

MULTIPLE ENDOCRINE NEOPLASIA TYPE IIB REPORT OF A CASE

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Chinese Medical Journal 1994年第1期 73-75页

作者：吴诚义姚榛祥吴凯南郁解非吕长虹 DepartmentofSurgery FirstAffiliatedHospitalChongqingUniversityofMedicalSciences DepartmentofPathologyMultipleendocrineneoplasia(MEN)typeIIb calledalsoMENIIIormucosalneuromasyndromeisararecondition.Atypicalcaseconfirmedbyau-topsyisherereportedanddiscussedbriefly.CASEREPORTA27-year-oldmalepatientcomplainedoffre-quentepigastricpainanddiarrheafor12years.Attheageof21hehadabiopsyofapapillarylesioninhiseyelidsandhistologicalexaminationcon-firmedthediagnosisofmucosalneuromas.Twoyearslatersubtotalgastrectomywasdoneforasus-pectedperforatedpepticulceratalocalhospital.Ex-plorationshowedanulceratthegastricantrumandanotherattheduodenalbulbandhypertrophicgastritisandproliferationoftheparietalcellswerefoundhistologically.Postoperativelydiarrheaper-sistedandepigastricdistentionappeared.OnSeptem-ber121990thepatientwasreferredtoourhospital.

Multiple endocrine neoplasia (MEN) type IIb,called also MEN III or mucosal neuroma syndrome,is a rare condition. A typical case confirmed by au-topsy is here reported and discussed *** REPORTA 27-year-old male patient complained of fre-quent epigastric pain and diarrhea for 12 years. Atthe age of 21, he had a biopsy of a papillary lesionin his eyelids, and histological examination con-firmed the diagnosis of mucosal neuromas. Twoyears later, subtotal gastrectomy was done for a sus-pected perforated peptic ulcer at a local hospital. Ex-ploration showed an ulcer at the gastric antrum andanother at the duodenal bulb and hypertrophicgastritis and proliferation of the parietal cells werefound histologically. Postoperatively, diarrhea per-sisted and epigastric distention appeared. On Septem-ber 12,1990, the patient was referred to ourhospital.

关键词： MTC MULTIPLE ENDOCRINE NEOPLASIA TYPE IIB REPORT OF A CASE

Comparison on Two Different Instrumental Methods for Determination of Fat Content in Washed Cashmere

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Animal Husbandry and Feed Science 2011年第4期3卷 47-48页

作者： WANG Hong-bo CHANG Yu-lan LI Wei-hong DU Tian-qing LIANG Li-na Lanzhou Institute of Animal Science and Veterinary Pharmaceutics of CAAS Quality Supervising Inspecting and Testing Center for Animal Fi-ber Fur Leather and Products (Lanzhou) of MOA of P. R. China Lanzhou 730050China

The aim of this study was to compare two different instrumental methods for determination of fat content in washed cashmere. The fat content in washed cashmere was determined using Soxhlet fat extraction unit and fiber grease extractor quickly, respectively. The results show that no significant difference was found between these two instrumental methods, and reliability of fiber grease extractor quickly was confirmed for deter- mination of fat content in washed cashmere. Therefore, the fiber grease extractor quickly can meet current standard for determination of fat content in washed cashmere.

关键词： Cashmere Fat content Fiber grease extractor quickly Soxhlet fat extraction unit