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Measurements of γ/γ' lattice Misfit and γ' Volume Fraction for a Ru-containing Nickel-based Single Crystal Superalloy

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journal of Materials Science & Technology 2011年第10期27卷 899-905页

作者： X.P. Tan j.l. liu X P Song T. jin X.F. Sun Z.Q. Hu Superalloy Division Institute of Metal Research Chinese Academy of Sciences- Shenyang 110016 China Analysis and Testing Division Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China

A conventional X-ray difFractometer has been used to determine the -y/y＇ lattice misfit and γ＇ volume fraction for a Ru-containing nickel-based single crystal superalloy at room temperature. The rocking curve was used to characterize the distribution of subgrains. The diffraction peaks obtained by w-20 scan were used to determine the γ/γ＇ lattice misfit and γ＇ volume fraction. A three peaks fitting model was proposed. The peak fitting results are in good agreement with the model. The X-ray diffraction results indicate that the nickel-based single crystal superalloy was not a perfect monocrystalline material, which is comprised of many subgrains; and each subgrain also consists of large numbers of mosaic structures. In addition, two anomalous reflection phenomena were found during the experiment and discussed with respect to their occurrence and impact on the measurement. The experimental results show that the γ/γ＇ lattice misfit and ~/r volume fraction will be various at the different regions of its dendritic microstructure. The average γ/γ＇ lattice misfit and γ＇ volume fraction of the experimental alloy are approximately-0.2% and 70%, respectively. Furthermore, the γ＇ volume fraction calculated by atom microprobe （AP） data is also basically consistent with the experimental results.

关键词： Nickel-based superalloy Microstructure X-ray diffraction lattice misfit y' volume fraction

Probabilistic Verification over GF(2m) Using Mod2-OBDDs

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Intelligent Information Management 2010年第2期2卷 95-103页

作者： j.l. Imana 不详

Formal verification is fundamental in many phases of digital systems design. The most successful verification procedures employ Ordered Binary Decision Diagrams (OBDDs) as canonical representation for both Boolean circuit specifications and logic designs, but these methods require a large amount of memory and time. Due to these limitations, several models of Decision Diagrams have been studied and other verification techniques have been proposed. In this paper, we have used probabilistic verification with Galois (or finite) field GF(2m) modifying the CUDD package for the computation of signatures in classical OBDDs, and for the construction of Mod2-OBDDs (also known as ?-OBDDs). Mod2-OBDDs have been constructed with a two-level layer of ?-nodes using a positive Davio expansion (pDE) for a given variable. The sizes of the Mod2-OBDDs obtained with our method are lower than the Mod2-OBDDs sizes obtained with other similar methods.

关键词： Verification Probabilistic OBDD Mod2-OBDD Galois Field GF(2m)

Ductile deformation within Upper Himalaya Crystalline Sequence and geological implications,in Nyalam area,Southern Tibet

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Chinese Science Bulletin 2012年第26期57卷 3469-3481页

作者： lIU XiaoBing lIU XiaoHan lElOUP P.H. MAHEO G. PAQUETTE j.l. ZHANG XinGang ZHOU Xuejun Key laboratory of Continental Collision and Plateau UpliftInstitute of Tibetan Plateau ResearchChinese Academy of SciencesBeijing 100085China laboratoire des sciences de la terre de lyon TerrePlanktesEnvironementCNRS UMR 5276Universitd Lyonl-ENS LyonVilleurbanne69622France Graduate University of Chinese Academy of Scienees Beijing 100049China laboratoire Magmas et Volcans CNRS UMR 6524Universite Blaise PascalClermont-Ferrand63038France

The South Tibet Detachment System(STDS) is a flat normal fault that separates the Upper Himalaya Crystalline Sequence(UHCS) below from the Tethyan Sedimentary Sequence(TSS) *** of deformations related to the STDS is critical to understand the mechanism and evolution of the Himalaya collision *** Nyalam detachment(ND)(～86°E) locates in the middle portion of STDS(81°-89°E).Dating of deformed leucocratic dykes that are most probably syntectonic at different depth beneath the ND,allow us to constrain the timing of deformation.(1) Dyke T11N37 located ～3500 m structurally below the ND emplaced at 27.4± 0.2 Ma;(2) Dyke T11N32 located ～1400 m structurally below the ND emplaced at 22.0±0.3 Ma;(3) T11N25 located within the top to the north STD shear zone,～150 m structurally below the ND,emplaced at 17.1±0.2 *** ND footwall cooling history and T11N25 deformation temperature,we indicate a probable onset of top to the north deformation at ～16 Ma at this *** results show an upward younging of the probable timing of onset of the deformation at different structural distance below the *** then propose a new model for deformation migration below the ND with deformation starting by pure shear deformation at depth prior to ～27.5 Ma that migrates upward at a rate of ～ 0.3 mm/a until ～18 Ma when deformation switches to top to the north shearing in the South Tibet Detachment shear zone(STDsz).As deformation on the ND stops at 14-13 Ma this would imply that significant top to the North motion would be limited to less than 5 Ma and would jeopardize the importance of lower channel flow.

关键词：喜马拉雅碰撞带塑性变形聂拉木地区西藏南部地质意义序列结晶藏南拆离系

RElATIVE IMPORTANCE OF WOOD DENSITY AND CARBOHYDRATE CONTENT ON PUlPING YIElD AND PRODUCT QUAlITY

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天津科技大学学报 2004年第S1期 73-82页

作者： Colodette j.l. Mokfienski A. Gomide j.l. Oliveira R.C. Forestry Engineering DepartmentFederal University of Vicosa Vicosa Brazil MG 36.570-000

SUMMARYThe purpose of this study was to evaluate basic density, chemical composition and fiber dimensions of ten Eucalyptus sp wood samples and verify the impact of this set of parameters and their combination on the Kraft pulping process yield and on bleached pulp quality. Ten eucalypt woods of different species, with basic densities varying from 365 to 544 kg/m3 and total wood carbohydrate contents varying from 70.0 to 74.5%, were transformed into kraft pulp of kappa number 17-18 and bleached to 90% ISO brightness by the sequence OD(PO)D. Wood basic density showed stronger correlations with fiber dimensions, pulping yield and pulp quality than did chemical composition. lighter woods resulted in higher yields. However, wood specific consumption was lower for denser woods, even though these demanded more drastic pulping conditions to achieve a given kappa number. The pulp quality results suggest that lower density woods should be directed towards fabrication of refined paper (printing and writing grades) while the denser woods be directed to the sanitary papers segment (tissue grades).

关键词： Eucalyptus wood density chemical composition fiber dimensions bleached kraft pulp.

RElATIVE IMPORTANCE OF WOOD DENSITY AND CARBOHYDRATE CONTENT ON PUlPING YIElD AND PRODUCT QUAlITY

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天津科技大学学报 2004年第A1期19卷 71-80页

作者： Colodette j.l. Mokfienski A. Gomide j.l. Oliveira R.C. Forestry Engineering DepartmentFederal University of Vicosa Vicosa MG 36.570-000 BrazilForestry Engineering DepartmentFederal University of Vicosa Vicosa MG 36.570-000 BrazilForestry Engineering DepartmentFederal University of Vicosa Vicosa MG 36.570-000 BrazilForestry Engineering DepartmentFederal University of Vicosa Vicosa MG 36.570-000 Brazil

关键词：纸浆生产产量木质纤维密度碳水化合物桉木漂白牛皮纸浆

INTERACTION OF PRECIPITATION AND RECRYSTAllIZATION IN RAPIDlY SOlIDIFIED Cu-Cr-Zr-Mg AllOY

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Acta Metallurgica Sinica(English letters) 1999年第3期12卷 273-275,576-277页

作者： liu, P. Kang, B.X. Cao, X.G. Huang, j.l. Yin, B. Gu, H.C. Xi'an jiaotong Univ Xi'an China

The recrystallization process of a rapidly solidified Cu-Cr-Zr-Mg alloy during its aging was investigate experimentally. It was found that (1) upon aging, the precipitation process takes place prior to recrystallization for the cold-deformed Cu-Cr-Zr-Mg alloy produced by rapid solidification, and the precipitates have a restrained effect on the following recrystallization process; (2) the hindrance of the dispersed fine precipitates to the common recrystallization leads to the simultaneous in situ and discontinuous recrystallization; (3) the resolution of the precipitates in the front of migrating grain boundaries takes place during the nucleation and growth of recrystallization, which results in a supersaturation in the recrystallized zones, while the re-precipitation of the supersaturated solute atoms in vacancies further increases the dispersion hardening effect.

关键词： Crystal microstructure Precipitation (chemical) Rapid solidification Recrystallization (metallurgy) Supersaturation

Deadly oasis:Recurrent annihilation of Cretaceous desert bryophyte colonies;the role of solar,climate and lithospheric forcing

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Geoscience Frontiers 2021年第1期12卷 1-12页

作者： juan Pedro Rodríguez-lópeza Eduardo Barrón Daniel Peyrot Gary B.hughes Department of Geology.Faculty of Science.United Arab Emirates University.50009.Al Ain Abu DhabiUnited Arab Emirates Instituto Geológico y Minero de Espana(IGME) Ríos Rosas 23E-28003MadridSpain School of Earth and Environment University of Western Australia.6101CrawleyWestern AustraliaAustralia Centre for Energy Geosciences University of Western Australia.6101CrawleyWestern AustraliaAustralia Physics Department University of CaliforniaSanta BarbaraCA93106USA

Many oases(wet interdunes)are sedimentary systems characterized by high-frequency water-level oscillations,marked changes in salinity and intense biological activity at their *** are considered to be one of the most challenging environments on Earth for ecosystem *** dynamic,depositional settings are usually unfavourable for fossilization and subsequent preservation of vegetal *** paper describes bryophyte(liverwort)assemblages occurring in three successive horizons interpreted to represent(i)recurrent early successional phases of biological soil crust colonization of wet interdune margins or(ii)exceptional preservation of floating or riparian liverworts in oasis pond waters associated with a progressive fall of the interdune water *** record of in situ colonization surfaces characterized by delicate(***-free)three-dimensional structures represents an exceptional type of preservation herein associated with a rapid variation in phreatic interdune water level and the subsequent establishment of anoxic and reducing *** occurrence of exceptionally preserved liverwort colonies coincides with the sedimentary record of,at least,three seismite levels in the *** gathered from the site suggests that the water table of the oasis was controlled by a combination of(i)a positive creation of accommodation space due to subsidence associated with movement on syn-sedimentary extensional faults,and(ii)the rise and fall of the oasis water table controlled by the oscillations of the groundwater system due to orbital changes which appear to drive the variability of the climate *** groundwater levels flooded the oasis soil crusts and lead to the exceptional recurrent preservation of liverwort colonies at the oasis ***,considering the hypothesis of floating or riparian liverworts in the oasis pond waters,the fall in the level of the oasis water table placed the floating liverworts in contact with the

关键词： Oasis Cretaceous liverworts Colonies Extensional tectonics Solar cyclicity

Pathophysiology of cerebral oedema in acute liver failure

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World journal of Gastroenterology 2013年第48期19卷 9240-9255页

作者： Teresa R Scott Victoria T Kronsten Robin D hughes Debbie l Shawcross Institute of liver Studies King’s College London School of Medicine at King’s College Hospital King’s College Hospital London SE5 9RS United Kingdom

Cerebral oedema is a devastating consequence of acute liver failure(AlF)and may be associated with the development of intracranial hypertension and *** AlF,some patients may develop cerebral oedema and increased intracranial pressure but progression to lifethreatening intracranial hypertension is less frequent than previously described,complicating less than one third of cases who have proceeded to coma since the advent of improved clinical *** rapid onset of encephalopathy may be dramatic with the development of asterixis,delirium,seizures and *** and vasogenic oedema mechanisms have been implicated with a preponderance of experimental data favouring a cytotoxic *** swelling is the most consistent neuropathological finding in humans with AlF and ammonia plays a definitive role in the development of cytotoxic brain *** mechanism(s)by which ammonia induces astrocyte swelling remains unclear but glutamine accumulation within astrocytes has led to the osmolyte *** evidence also supports an alternate‘Trojan horse’hypothesis,with glutamine as a carrier of ammonia into mitochondria,where its accumulation results in oxidative stress,energy failure and ultimately astrocyte *** a complete breakdown of the blood-brain barrier is not evident in human AlF,increased permeation to water and other small molecules such as ammonia has been demonstrated resulting from subtle alterations in the protein composition of paracellular tight *** present,there is no fully efficacious therapy for cerebral oedema other than liver transplantation and this reflects our incomplete knowledge of the precise mechanisms underlying this process which remain largely unknown.

关键词： Cerebral oedema Acute liver failure Ammonia Hepatic encephalopathy Intracranial pressure Intracranial hypertension Cerebral blood flow

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《马丁·菲耶罗札记》

外国文学 1999年第4期 72-76页

作者： j.l.博尔赫斯北京大学

关于高乔人马丁·菲耶罗１８２４年苏克雷在阿亚古丘展开的军事行动实现了“美洲的独立”；半个世纪以后，在布宜诺斯艾利斯省的乡村，“征服”却尚未了结。在卡斯特列尔、宾森或纳姆古拉的指挥下，印第安人侵扰基督徒的庄园并抢掠牲畜... 详细信息

关于高乔人马丁·菲耶罗１８２４年苏克雷在阿亚古丘展开的军事行动实现了“美洲的独立”；半个世纪以后，在布宜诺斯艾利斯省的乡村，“征服”却尚未了结。在卡斯特列尔、宾森或纳姆古拉的指挥下，印第安人侵扰基督徒的庄园并抢掠牲畜；过了胡宁和阿苏尔，一溜碉堡标志着...

关键词：《浮士德》札记印第安人《堂吉诃德》主人公第一次世界大战现实主义阿斯卡布宜诺斯艾利斯时代庄园