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| 1 | Requirements for the transfer of lead-free piezoceramics into application显示文摘The recent review for the Restriction of Hazardous Substances Directive(RoHS)by the expert committee,appointed by the European Union,stated that the replacement of PZT“…may be scientifically and technologically practical to a certain degree…”,although replacement“…is scientifically and technically still impractical in the majority of applications.”Thus,two decades of sustained research and development may be approaching fruition,at first limited to a minority of applications.Therefore,it is of paramount importance to assess the viability of lead-free piezoceramics over a broad range of application-relevant properties.These are identified and discussed in turn:1.Cost,2.Reproducibility,3.Mechanical and Thermal Properties,4.Electrical Conductivity,and 5.Lifetime.It is suggested that the worldwide efforts into the development of lead-free piezoceramics now require a broader perspective to bring the work to the next stage of development by supporting implementation into real devices.Guidelines about pertinent research requirements into a wide range of secondary properties,measurement techniques,and salient literature are provided. | Jurij Koruza Andrew J.Bell Till Fromling Kyle G.Webber Ke Wang Jürgen Rodel | 2018 | Journal of Materiomics2018，4，1： | 14 |
| 2 | 孕期补充叶酸:不仅仅是预防神经管缺陷显示文摘叶酸(维生素B9)是DNA复制的必需原料,并且是氨基酸合成、维生素代谢中酶促反应的底物之一。由于孕期胎儿的生长发育也需要叶酸,因此孕期对叶酸需求也相应增加。叶酸缺乏会引起母婴异常,孕妇主要有贫血、周围神经病变,而胎儿则有发生先天性畸形的可能。这篇文章综述了叶酸的代谢、孕期如何合理补充叶酸及其潜在的益处,以及补充左旋甲基叶酸对神经管缺陷以外的孕期相关并发症的预防作用。 | James A.Greenberg Stacey J.Bell Yong Guan Yan-hong Yu 高云飞 黄启涛 乔娟(译) | 2012 | 妇产与遗传(电子版)2012，2，3： | 3 |
| 3 | ω-3脂肪酸与妊娠显示文摘MedReviews,LLC与南方医科大学南方医院于2011年2月共同签署合作协议,授权南方医科大学南方医院拥有其旗下杂志Reviews in Obstetrics and Gynecology中所刊文章中文版权,英文文章版权仍归MedReviews所有。 | Jaclyn M.Coletta Stacey J.Bell DSc Ashley S.Roman 高云飞 乔娟 | 2011 | 妇产与遗传(电子版)2011，1，1： | 2 |
| 4 | FOREIGN ENTRY, CULTURAL BARRIERS, AND LEARNING显示文摘 | HARRY G.BARKEMA JOHN H. J.BELL JOHANNES M.PENNINGS | 1998 | Strat. Mgmt. J1998，，2： | 1 |
| 5 | Increasing hepatitis B viral load is associated with risk of significant liver fibrosis in HBeAg‐negative but not HBeAg‐positive chronic hepatitis B显示文摘 | Catherine M. N.Croagh Sally J.Bell JohnSlavin Yu X. G.Kong Robert YChen StephenLocarnini Paul VDesmond | 2010 | Liver International2010，，8： | 1 |
| 6 | Long-Term Safety of Recombinant Human Growth Hormone in Children显示文摘 | J.Bell K.L.Parker R.D.Swinford | | 0，，01： | 1 |
| 7 | Salesperson learning,organizational learning,and retail store performance显示文摘 | Simon J.Bell Bülent Mengüc Robert E.Widing II | | 0，，： | 1 |
| 8 | An equivalent dipole analysis of PZT ceramics and lead-free piezoelectric single crystals显示文摘The recently proposed Equivalent Dipole Model for describing the electromechanical properties of ionic solids in terms of 3 ions and 2 bonds has been applied to PZT ceramics and lead-free single crystal piezoelectric materials,providing analysis in terms of an effective ionic charge and the asymmetry of the interatomic force constants.For PZT it is shown that,as a function of composition across the morphotropic phase boundary,the dominant bond compliance peaks at 52%ZrO_(2).The stiffer of the two bonds shows little composition dependence with no anomaly at the phase boundary.The effective charge has a maximum value at 50%ZrO_(2),decreasing across the phase boundary region,but becoming constant in the rhombohedral phase.The single crystals confirm that both the asymmetry in the force constants and the magnitude of effective charge are equally important in determining the values of the piezoelectric charge coefficient and the electromechanical coupling coefficient.Both are apparently temperature dependent,increasing markedly on approaching the Curie temperature. | Andrew J.Bell | 2016 | Journal of Advanced Dielectrics2016，6，2： | 0 |
| 9 | BGP Pioneer船载地震数据处理显示文摘船载处理(Fast Track Processing)能力是多缆船队综合技术实力的体现,目前国际上大石油公司都要求合同执行者具备船载处理的能力。文中介绍了船载处理(Fast Track Processing或Back Deck Stack)的概念,并着重介绍了BGP Pioneer六缆勘探船在加纳深海C3P探区的三维海洋地震采集技术、船载地震数据处理系统软硬件配置及地震数据处理技术,展示了海洋三维地震数据的多次波压制、τ-p反褶积方法等特色技术,处理效果得到了甲方的认可。 | 李振勇 Peter J.Bell Gabriel Osatey 李东升 辜利民 姜浩 | 2008 | 石油地球物理勘探2008，43，S1： | 0 |
| 10 | Soil Water Hysteresis at Low Potential显示文摘Knowledge of the soil water characteristic curve is fundamental for understanding unsaturated soils.The objective of this work was to find scanning hysteresis loops of two fine textured soils at water potentials below wilting point.This was done by equilibration over NaCl solutions with water potentials of-6.6 to-18.8 MPa at 25℃.When cycled repeatedly through a series of potentials in the range noted previously both soils exhibited a hysteresis effect.The experimental differences in water content between the drying and wetting soils at the same water potential were much too large to be accounted for by failure to allow sufficient time to attain equilibrium as predicted by the exponential decay model.The wetting versus drying differences were relatively small,however,at only 4 mg g-1 or less in absolute terms and about 3% of the mean of wetting and drying,in relative terms.Hysteresis should be a consideration when modeling biological and physical soil processes at water contents below the wilting point,where small differences in water content result in large potential energy changes. | L.PRUNTY J.BELL | 2007 | Pedosphere2007，17，4： | 0 |
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