裂隙岩石中的地震速度:对Hudson理论的实验验证

由于裂缝或裂隙的存在,不同油气层和含水层中流体的流动得到加强。通过研究对储层中纵横波传播的影响后可对其进行检测。这种影响可通过一些理论(包括Hudson)来预测。虽然Hundon理论已用于计算裂缝密度,但这种理论预测仍未用分布有已知裂缝     

结构应用的CVD钨和钨—铼合金

研究了ＣＶＤ钨和钨－铼合金的显微组织，估价了它们作为高温材料的适用性。我们发现反应室的分压影响了沉积纯钨和钨－铼合金的显微组织和表面粗糙度。沉积纯钨和钨－铼合金的晶粒度都在０．５ｕｍ以下。实验证明，细晶粒钨的硬度（Ｈｖ〉１０００，室温（Ｒ．Ｔ）、弯曲强度（Ｒ．Ｔ￣１１７５Ｋ，δ＝７００￣１２３０ＭＰａ）和线性热膨胀系数（５７５￣１１７５Ｋ，β＝４．５￣４．９×１０＾－６Ｋ＾－１）比柱状结构钨大。     

罩式退火炉的控制系统

茹尔克拉钢厂罩式退火炉由于应用于符合现代化工艺规范的仪表和分布式控制系统，而大大提高了产品的质量和产量，并使能耗显著降低。     

“发动”艺术

“艺术”、“设计”、“奥迪”,三个彼此独立却息息相关的名词。作为全球最强设计品牌之一的奥迪,在过去四十多年中,从未间断与全球顶级艺术和设计领域的亲密对话与无间合作。如今,奥迪已经成为全球诸多顶级艺术与设计活动及顶尖艺术家最亲密的合作伙伴,“跨界”更成为品牌对艺术与设计支持的独特标签。     

Dynamic proteome in enigmatic preeclampsia: an account of molecular mechanisms and biomarker discovery

The coevolution of genomics and proteomics has led to advancements in the field of diagnosis and molecular mechanisms of disease. Proteomics is now stepping into the field of obstetrics, where early diagnosis of pregnancy complication such as preeclampsia (PE) is imperative. PE is a multifactorial disease characterized by hypertension with proteinuria, which is a leading cause of maternal and neonatal morbidity and mortality occurring in 5-7% of pregnancies worldwide. This review discusses the probable molecular mechanisms that lead to PE and summarizes the proteomics research carried out in understanding the pathogenicity of PE, and for identifying the candidate biomarker for diagnosis of the disease.     

Just a matter of time

As Midwestern foodservice directors & dietitians recently discovered when an earthquake alert was sounded in their area, it's never too early to review & update emergency plans. Herein is a compendium of tips that can be used by any foodservice professional working in an area at risk of disaster, whether it be earthquake, tornado, hurricane, blackout or flood.     

砷化镓材料中EPR“As_(Ga)”的退火行为

本文比较了中子辐照。压缩变形和原生LEC砷化镓等三种不同来源样品的EPR“As_(Ga)”的Hamiltonian参数。并系统地研究了EPR“As_(Ga)”的浓度和低温光猝灭行为随退火温度的变化,从而进一步验证了EPR“As_(Ga)”的本性,即除孤立As_(Ga)反位原子外,还可能包括As_(Ga)的一些空位络合物。这些不同本性的EPR“As_(Ga)”缺陷及其它有关的缺陷在样品热处理过程中可能相互转化。按照物理化学中Le Chatlier原理,缺陷的原始浓度和晶体内部应变能似应是引起这些转化反应的重要因素。