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Quantitative business modeling /

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System for Measuring Elevator Guide Rail Quality and Its Calibration

2002年

作者： Meredith jack R.

来源：畅想之星图书光盘版（南... 评论

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Transactions of Tianjin University 2006年第2期12卷 84-91页

作者：李醒飞 HU S jack 张国雄郭敬滨 State Key Laboratory of Precision Measurement Technology and Instruments Tianjin University Tianjin 300072China Department of Mechanical Engineering University of Michigan Ann ArborMI 48109USA

A system for measuring the quality parameters of elevator guide rails is developed. The quality parameters the system can measure include straightness, flatness, squareness, width and height of the rail. The system consists of six parts：main guideway, auxiliary guideway, reference rail, saddle, control casing and measured rail. The guide rail to be measured is mounted on a bed. The straightness errors of surfaces are checked by five linear displacement sensors mounted on the saddle. The deviation of readings from the sensor, which is in contact with top guiding surface, gives the straightness error of the surface and height of the rail. The other four sensors are used to measure side guiding surfaces respectively and give other parameters including flatness on the surfaces, squareness, width and height of the rail. A novel calibration method is also developed to calibrate the straightness motion error of the system in horizontal and vertical directions. The deflection deformation of the measured rail is fitted by using a fourth-order polynomial. Experimental results show that the uncertainty of the system on the side surfaces after compensating the straightness motion error is less than 0. 01 mm, and the uncertainty of the system on the top surface after compensating the straightness motion error and the deflection deformation of the rail is less than 0. 03 mm.

关键词： error compensation elevator rail calibration method

裂缝性油气藏采收率:100个裂缝性油气田实例的经验总结(英文)

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石油勘探与开发 2003年第6期30卷 129-136页

作者： jack Allan S Qing Sun C&CReservoirsInc. C&CReservoirsInc. 10333HarwinDriveSuite550HoustonTexas77036USA10333HarwinDriveSuite550HoustonTexas77036USA

通过对世界上100个裂缝性油气藏的综合评价,研究储集层及流体本身的性质(包括孔隙度、渗透率、黏度、可动油比例、含水饱和度、润湿性及裂缝分布特征等)和驱动机制及油藏管理战略(优化日产量和采用不同类型的提高采收率技术)对其最终采... 详细信息

通过对世界上100个裂缝性油气藏的综合评价,研究储集层及流体本身的性质(包括孔隙度、渗透率、黏度、可动油比例、含水饱和度、润湿性及裂缝分布特征等)和驱动机制及油藏管理战略(优化日产量和采用不同类型的提高采收率技术)对其最终采收率的影响。将裂缝性油气藏分为4类:Ⅰ类的基质几乎没有孔隙度和渗透率,裂缝是储存空间和流体流动的通道;Ⅱ类的基质有较低的孔隙度和渗透率,基质提供储存空间,裂缝提供流动通道;Ⅲ类(微孔隙)的基质具有高孔隙度和低渗透率,基质提供储存空间,裂缝提供流动通道;Ⅳ类(大孔隙)的基质具有高的孔隙度和渗透率,基质提供储存空间和流动通道,裂缝仅增加渗透率。对26个Ⅱ类油气藏和20个Ⅲ类油气藏的开采历史的研究表明:Ⅱ类油气藏的采收率受水驱强度和最优日产量控制,日产量过高会很容易破坏Ⅱ类油气藏,一些Ⅱ类油气藏如果管理得当,采收率可以很高,不需要二次或三次采油;Ⅲ类油气藏的采收率主要受岩石和流体本身性质的影响,特别是基质渗透率、流体重度、润湿性以及裂缝强度等,不进行二次或三次采油不可能完全开采,往往需要采用一些提高采收率的专门技术。以往将Ⅱ类和Ⅲ类裂缝性油气藏归为一类,认识它们的区别将有助于选择更好的开发策略。

关键词：采收率裂缝性油气藏驱油机理裂缝性油气藏分类

Influence of birth order, birth weight, colostrum and serum immunoglobulin G on neonatal piglet survival

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Journal of Animal Science and Biotechnology 2013年第2期4卷 128-136页

作者： Rafael A Cabrera Xi Lin Joy M Campbell Adam J Moeser jack Odle Laboratory of Developmental Nutrition Department of Animal Science North Carolina State University Huvepharma USA Inc. 525 West Park Drive Suite 230 Peachtree City American Protein Corporation Department of Population Health and Pathobiology College of Veterinary Medicine North Carolina State University 101 Polk Hall North Carolina State University

Background： Intake of colostrum after birth is essential to stimulate intestinal growth and function, and to provide systemic immunological protection via absorption of Immunoglobulin G （IgG）. The birth order and weight of 745 piglets （from 75 litters） were recorded during a one-week period of farrowing. Only pigs weighing greater than 0.68 kg birth weight were chosen for the trial. Sow colostrum was collected during parturition, and piglets were bled between 48 and 72 hours post-birth. Piglet serum IgG and colostral IgG concentrations were determined by radial immunodiffusion. Results： Sow parity had a significant （P 〈 0.001） effect on sow colostral IgG concentration, being 5% higher in multiparous females. Sow colostral IgG concentration explained 6% and piglet birth order accounted for another 4% of the variation observed in piglet serum IgG concentration （P 〈 0.05）; however, birth weight had no detectable effect. Piglet serum IgG concentration had both a linear （P 〈 0.05） and quadratic effect （P 〈 0.05） on % survival. Piglets with 1,000 mg/dl serum IgG or less （n=24） had a 67% survival; whereas, piglets with IgG concentrations between 2250 to 2500 mg/dl （n=247） had a 91% survival. Birth order had no detectable effect on survival, but birth weight had a positive linear effect （P 〈 0.05）. Piglets weighing 0.9 kg （n = 107） at birth had a 68% survival rate, and those weighing 1.6 kg （n = 158） had an 89% survival. Conclusion： We found that the combination of sow colostrum IgG concentration and birth order can account for 10% of the variation of piglet serum IgG concentration and that piglets with less than 1,000 mg/dl IgG serum concentration and weight of 0.9 kg at birth had low survival rate when compared to their larger siblings. The effective management of colostrum uptake in neonatal piglets in the first 24 hrs post-birth may potentially improve survival from birth to weaning.

关键词： Birth order Birth weight Immunoglobulin G Colostrum Survivability

Greater bud outgrowth of Bromus inermis than Pascopyrum smithii under multiple environmental conditions

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Journal of Plant Ecology 2017年第3期10卷 518-527页

作者： Jacqueline P.Ott jack L.Butler Yuping Rong Lan Xu Department of Natural Resource Management South Dakota State UniversityBox 2140BBrookingsSD 57007USA Forest and Grassland Research Laboratory US Forest ServiceRocky Mountain Research Station8221 South Highway 16Rapid CitySD 57702USA Department of Grassland Science Animal Science&Technology CollegeChina Agricultural University2 Yuan Ming Yuan West RoadHaidian DistrictBeijing 100193China

Aims Tiller recruitment of perennial grasses in mixed-grass prairie primar-ily occurs from belowground *** conditions,such as temperature,soil moisture and grazing can affect bud outgrowth of both invasive and native perennial *** bud out-growth responses of native and invasive species to climate change and grazing could alter competitive interactions that have impli-cations for future land *** aims of this work were to(i)compare how spring temperature altered bud outgrowth of native Pascopyrum smithii(Rydb.)Á.Löve(western wheatgrass)and introduced Bromus inermis Leyss.(smooth brome),(ii)compare how watering frequency altered bud outgrowth of these two species and(iii)evaluate how clipping interacts with spring temperature or watering frequency to affect *** bud *** Individual plants of *** and *** were harvested from North American mixed-grass *** outgrowth from tillers of both species were evaluated under three spring temperature regimes(Average:12,18 and 24°C)and two watering frequen-cies(frequent and intermittent)in a growth chamber *** response of *** bud outgrowth to clipping was also *** Findings Bromus inermis had more buds per tiller and initiated a greater pro-portion of these buds than *** under all temperature and mois-ture *** smithii bud development was reduced at 24°*** watering did not significantly impact bud out-growth of either *** increased *** bud mortality and reduced its bud development for the 2-week period of the *** robust vegetative reproductive capacity of *** under a range of environmental conditions is a key mechanism enabling the expansion of *** into ***-dominated mixed-grass prai-rie in North ***-grass prairie dominated by *** experiencing repeated defoliation may require longer recovery times and be more susceptible to ***

关键词： bud bank climate change drought grazing invasive species perennial grass

The Photoshop 3 wow! book : tips, tricks & techniques for Adobe Photoshop 3 Macintosh ed

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Project management : a managerial approach / 6th ed.

1995年

作者： Linnea Dayton & jack Davis.

来源：畅想之星图书光盘版（南... 评论

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Appropriate use criteria for cardiac catheterization and coronaryrevascularization

2006年

作者： Meredith jack R.

来源：畅想之星图书光盘版（南... 评论

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Chinese Medical Journal 2014年第6期127卷 1161-1165页

作者： jack P.Chen Thach Nguyen Faisal Latif Theodore A.Bass Department of Medicine Northside Hospital Atlanta Georgia USA Indiana University School of Medicine Community Healthcare System St Mary Medical Center Hobart Indiana USA Department of Medicine Cardiovascular Section VA Medical Center and University of Oklahoma Health Sciences Center Oklahoma CityOklahoma USA Division of Cardiology University of Florida USA

Challenges Since its inception,the field of invasive and interventionalcardiology has witnessed tremendous procedural andtechnological advancements,thereby offering quantumexpansion in clinical *** the complexity ofth... 详细信息

关键词： appropriate use criteria cardiac catheterization percutaneous coronary intervention treadmill risk factors

The Impact of Sea Level Rise on Roadway Design and Evacuation Routes in Delaware

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