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7篇 您的检索式:作者名="L.Jacobs"
    题名 作者 年代 出处 被引量
1一种基于非线性超声谐波幅值比的微裂缝探测方法显示文摘超声波穿过受损材料后,都会产生一定程度的非线性效应,如谐波.利用非线性波动理论中二阶谐波幅值与基波幅值的关系,探讨了通过测试谐波比关系的变化,获得材料非线性特征改变,进而判断材料损伤的方法,并进行了试验研究.试验中制作了两组水泥砂浆试棒,采用了相同活性碱骨料砂、相同水灰比,其中一组中通过碱骨料反应引入不同程度的微裂缝;另一组保持无损状态.两组水泥砂浆试验的对比试验结果表明,材料经碱骨料损伤后,其超声非线性特征变化十分明显.证明本方法对混凝土材料微裂缝的探测非常敏感,对于水泥基材料而言,是一种极具潜力的材料退化评估方法.陈小佳 沈成武 Laurence L.Jacobs 2007武汉大学学报(工学版)2007,40,6:14
2结构化在职培训方法的运用显示文摘近二十年来,结构化在职培训(S-OJT)逐渐走热于企业培训领域。它以系统理论和情境学习理论为基础,以标准化、灵活性、可迁移性为主要特征,适合用于企业员工或分工变化时、引入新技术或新机器时的培训以及需要记录的培训。关晶 Ronald L.Jacobs 2009中国人力资源开发2009,26,4:7
3China's advertising agencies:Problems and relations显示文摘Liang K L.Jacobs 0,,03:1
4An alternative approach for sustainable sheep meat production:implications for food security显示文摘Background:A pelleted diet containing camelina hay(CAMH)or camelina meal(CAMM)as a supplement along with a control pellet(CONT)diet formulated with commonly available feeds during summer was used to investigate an alternative pathway for sustainable meat production.Sustainable meat production was based on a simple estimation of income from meat produced versus feed costs if animals were fed for an extended period over summer compared to early slaughter at the beginning of summer.Eighty maternal composite wether lambs(Composite)based on Coopworth genetics and 80 pure Merino wether yearlings were divided into 10 groups within breed(n=8)using stratified randomisation based on liveweights.Following 1 week of adaptation to experimental diets,animals were fed experimental diets for up to10 weeks.Results:Animals were slaughtered after either 8,9 or 10 weeks of full feeding when the average liveweight of diet/genetic combination reached a weight appropriate for either‘heavy lamb’or‘heavy hogget’production,which occurred between 8 and 10 weeks of full feeding.There was no diet×breed interactions except for dressing percentage(DP),where Composite lambs fed the CAMH diet had the greatest DP(48.1±0.35)and the Merino yearlings fed the CAMM diet the lowest DP(45.8±0.33).Composite lambs gained 17.6–20.3 kg and Merino yearlings gained 10.7–12.9 kg liveweight.Based on their DP,this resulted in the production of approximately 8.3–9.5 kg additional carcass weight in Composites and 4.9–5.7 kg in Merinos,which in turn produced greater profit per Composite lamb and a small profit per Merino yearling.Conclusions:Composite lambs fed CAMM and CAMH had 5%greater carcass weights at slaughter compared to the CONT group,but dietary treatments did not change carcass weight of Merino yearlings at slaughter.The extended feeding approach offered the producer an estimated economic gain of AUD$20.00 to$25.00 when yearly average prices were used(Method 1)and AUD$40.00 to$47.70 when pre-and post-summer average prices were used(Method 2)per Composite lambs,but extra carcass gain did not result in the same profit per Merino yearling.Among the Composites,the profit for animals fed the CAMH and CAMM were AUD$2.75 to$4.50 greater than CONT group when full year average prices were applied while AUD$3.50 to$5.50 greater than CONT group when pre-and post-summer average prices were applied.However,we acknowledge a combination approach of extended feeding for a portion of animals already on ground and selling the remaining animals pre-summer with joining of additional ewes is the most likely strategy.Considering the scenario of extended feeding for 3 weeks,based on the growth rates observed for Composite lambs,if an additional 2 kg carcass weight per animal can be gained for 50%of the 22 million lambs slaughtered in Australia(=11 million animals),it would potentially supply an additional 22 million kg of lamb carcasses produced per annum.This is equivalent to producing an extra 1 million lamb carcasses per annum weighing 22 kg each.Feeding Composite lambs for an extended period and selling Merino yearlings pre-summer may be a good option due to faster growth rate of Composites that may help quick turn-over to market.Eric N.Ponnampalam Matthew I.Knight Peter J.Moate Joe L.Jacobs 2021Journal of Animal Science and Biotechnology2021,12,2:0
5Technology Deployment to Improve Clinical Outcomes显示文摘Improved child, newborn, and maternal health(CNM) is a top priority in developing countries. Many factors must be addressed simultaneously to improve clinical outcomes for CNM. A public-private project in Haiti that will deploy the World Health Organization(WHO) evidence-based medicine(EBM) and essential interventions utilizing CNM healthcare technologies(HT), is expected to be a model for improving national health systems. The CNM mortality rates in Haiti are the highest in the western hemisphere with rates similar to those found in Afghanistan and several African countries. Several factors perpetuating this crisis are noted, as well as the most cost-effective interventions proven to decrease CNM mortality rates in low-and middle-income countries. To create major change in health system infrastructure, two strategies are presented, requiring appropriate and leading-edge health technologies(HT), e.g., wireless cellular-network-based Telemedicine(TM):(1) Development of a countrywide network of geographical 'Community Care Grids' to facilitate implementation of frontline interventions;(2) The construction of a central hospital(called Bethesda Referral and Teaching Hospital-BRTH NGO) that will provide secondary and tertiary care for communities throughout the country, including helping local hospitals and clinics practice EBM care. We believe that these strategies-supported by HT will fast track improvement in CNM mortality rates throughout the country and that in a relatively short period of time Haiti's health care system will be among the leaders in the region. Primary factors contributing to the CNM crisis, all addressed by TM:(1) Limited access: demographics, geography, cost, transportation;(2) Inadequate health care facilities: less than 20 NICU beds for 10 million population; BRTH to provide 80 bed NICU and 40 bed PICU in 225 bed hospital;(3) Health care practitioners: inadequate numbers and training;(4) Low % of skilled attendants now at deliveries;(5) Low % of prenatal and postnatal visits; and(6) High risk deliveries in qualified health facilities: only 25% now. BRTH NGO guiding principles:(1) Partnerships: Internal: Public-Ministry of Health and Private hospitals; External: collaboration with USA-based CNM specialists(on-site at BRTH and via TM);(2) Philanthropic donor model for both capital and operating funds: a leading WHO CNM physician expert says BRTH to provide EBM care for 'pennies on the dollar comparatively';(3) Public-Private Partnership plan for national/regional HT Management Projects and Maintenance Centers; BTRH at new Port;(4) Care processes: to meet Joint Commission International(JCI)Standards;(5) Safety and Security design: addressing seismic issues;(6) Countrywide: hospitals in Haiti's 10 internal regions/provinces enabled for EBM; and(7) Financial: patient remuneration based on sliding scale for no charge care as needed. EBM and Essential Interventionsutilize HT at every stage of CNM care:(1) Pregnancy;(2) Delivery;(3) Post-Delivery: Mother and Baby; and(4) Infancy and Childhood up to age 5.T.M.Judd L.Jacobs M.Jansen B.Birch 2016中国医疗设备2016,31,1:0
6振动场下微裂材料的非线性超声调幅特征显示文摘一般在材料损伤后,其非线性力学特征更加明显.在高频声波和低频振动位移场下,开裂材料会出现非线性超声调幅现象.介绍了非线性超声调幅现象,对微裂材料的非线性超声调幅特征进行探讨,提出以旁频能量与振动输入能量之比,作为描述材料损伤的定量参数,并进行试验研究,采用碱骨料反应对2根混凝土试件引入微裂缝损伤,与1根无损试件进行对比.试验结果显示,振动场下微裂材料的非线性超声调幅特征十分明显,2根损伤试件在不同损伤水平上的相对损伤参数有较大改变,且在相同损伤水平上两者十分接近;而对比无损试件的相对损伤参数变化很小.表明该方法对微裂缝损伤极为敏感,运用相对损伤参数能够对损伤的程度给出定量化的描述,且具有较好的一致性.陈小佳 沈成武 Laurence L.Jacobs 2008武汉大学学报(工学版)2008,41,3:0
7企业员工培训“第三条道路”显示文摘企业要想取得优良业绩,需要员工具备解决问题、作出决策的专业技能。对许多中国公司来说,让员工获得专业知识的方法不外乎两个:课堂培训或者在职培训。结构化在职培训(structuredon-the-jobtraining)是'第三条道路',它综合了两种方法的长处,是促使员工能力突飞猛进的强大手段之一。Ronald L.Jacobs 2007职业技术教育2007,28,27:0
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