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GRAIN GROWING DyNAMICS OF MgO-CaO COMPOSITE CERAMICS

中国空间科学学会空间物理学专业委员会第十五届全国日地空间物理学研讨会

作者： Li,S.y. y.Omura IPSL Deng,X.H. H.Kojima y.Saito Zhang,S.F. Research Institute for Sustainable Humanosphere Kyoto UniversityUjiKyoto 611-0011Japan College of Aerospace Science and Engineering National University of Defense Technology Nanchang University Department of Space Physics Wuhan University Institute of Space and Astronautical Sciences Japan Aerospace Exploration AgencySagamiharaKanagawa229-8510Japan

Analysis on electrostatic solitary waves(ESWs)observed in the upstream and downstream of the slow-shock near the magnetic reconnection diffusion region is *** show that the ESWs propagate outwards in the upstream region while inwards in the downstream *** amplitude of ESWs in the downstream is more than 6 times those in the upstream,suggesting that energy outwards from reconnection X-line is much larger than ***,observations show,that electron beams associated with ESWs,which are parallel to ambient magnetic are much stronger in the downstream than in the upstream region of slow *** of electron beams in both upstream and downstream are coherent with the propagation directions of *** are consistent with the generation mechanism of ESWs which are suggested to be related to electron *** result is helpful for solving the issue of ESWs’generation mechanism associated with magnetic *** also provides an important hint for the understanding of fast energy release during the magnetic reconnection process.

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来源： cnki会议评论

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Acta Metallurgica Sinica(English Letters) 2000年第6期13卷 1155-1158页

作者： T.M. Jia and G. y. An (Harbin University of Technology, Harbin 150001, China) S.X. Che (Liaoning Institute of Technology, Jinzhou 121000, China) Harbin Univ. of Technol. Harbin 150001 China

The grain growing dynamics including the growing process, the growing exponent and the growing activation energy is obtained for the MgO-CaO composite ceramics with the additions of Fe2O3, CeO2 and/or ZrO2 as fluxes by measuring the size of grains with the method of Straight Line Across. The results show that all of the additions, in which Fe2O3 is the strongest, have notable effects on the grain growing dynamics by reducing the growing activation energy and promoting the grain growing. The research gives a good reference for the additions of fluxes to the matrix of ceramic filter.

关键词： MgO-CaO composite ceramics growing exponent activation energy

Turbulence and mixing in a freshwater-influenced tidal bay: Observations and numerical modeling

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Science China Earth Sciences 2015年第7期58卷 2049-2058页

作者： LIAN Qiang LIU Zhiyu Department of Physical Oceanography College of Ocean & Earth Sciences Xiamen University State Key Laboratory of Marine Environmental Science Xiamen University

In situ observations and numerical simulations of turbulence are essential to understanding vertical mixing processes and their dynamical controls on both physical and biogeochemical processes in coastal embayments. Using in situ data collected by bottom-mounted acoustic Doppler current profilers(ADCPs) and a free-falling microstructure profiler, as well as numerical simulations with a second-moment turbulence closure model, we studied turbulence and mixing in the Xiamen Bay, a freshwater-influenced tidal bay located at the west coast of the Taiwan Strait. Dynamically, the bay is driven predominantly by the M2 tide, and it is under a significant influence of the freshwater discharged from the Jiulong River. It is found that turbulence quantities such as the production and dissipation rates of the turbulent kinetic energy(TKE) were all subject to significant tidal variations, with a pronounced ebb-flood asymmetry. Turbulence was stronger during flood than ebb. During the flooding period, the whole water column was nearly well mixed with the depth-averaged TKE production rate and vertical eddy viscosity being up to 5?10?6 W kg?1 and 2?10?2 m2 s?1, respectively. In contrast, during the ebb strong turbulence was confined only to a 5?8 m thick bottom boundary layer, where turbulence intensity generally decreases with distance from the seafloor. Diagnosis of the potential energy anomaly showed that the ebb-flood asymmetry in turbulent dissipation and mixing was due mainly to tidal straining process as a result of the interaction between vertically shared tidal currents and horizontal density gradients. The role of vertical mixing in generating the asymmetry was secondary. A direct comparison of the modeled and observed turbulence quantities confirmed the applicability of the second-moment turbulence closure scheme in modeling turbulent processes in this weakly stratified tidally energetic environment, but also pointed out the necessity of further refinements of the model.

关键词： tidal bay turbulent mixing second-moment turbulence closure model turbulent kinetic energy dissipation rate vertical eddy viscosity

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On the Discovery of Bothriolepis in the Devonian of Central Hunan

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地质学报 1940年第1期 57-72+118页

作者： y.S.CHI Geological Survey of China

A new species of Antiarchi, Bothriolepis sinensis Chi (sp. nov.), was discovered from theUpper (?) Devonian purple shale of Nanmuchung, near Tiaomachien, southeast of the city ofChangsha in central Hunan. Besides a detailed pal?ontological description of the fish, discussionson its stratigraphical positien, and on the age of the fossil plants collected from beds eight metersbelow the Bothriolepis-bed are given. This is the first Devonian Antiarch definitely recordedfrom the continent of Asia (vide P.S. on p.71).

关键词： On the Discovery of Bothriolepis in the Devonian of Central Hunan

Design of Magnet System for RIKEN Superconducting ECR Ion Source

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Chinese Physics C 2007年第S1期31卷 37-40页

作者： J.Ohnishi T.Nakagawa y.Higurashi M.Kidera H.Saito A.Goto Nishina Cnter for Accelerator-based Science RIKENHirosawa 2-1WakoSaitarna351-0198Japan

Superconducting magnet system for a 28GHz ECR ion source has been *** maximum axial magnetic fields are 4T at the rf injection side and 2T at the beam extraction side,*** hexapole magnetic field is about 2T on the inner surface of the plasma *** superconducting coils consist of six solenoids and six racetrack windings for a hexapole *** kinds of coil arrangements were investigated:one is an arrangement in which the hexpole coil is located in the bore of the solenoids,and another is the reverse of *** coils use NbTi-Copper conductor and are bath-cooled in liquid *** six solenoids are excited with individual power supplies to search for the optimal axial field *** current leads use high Tc material and the cryogenic system is operated in LHe re-condensation mode using small *** thermal insulated supports of the cold mass have also been designed based on the calculated results of the magnetic *** heat loads to 70K and LHe stages were estimated from the design of the supports,the current leads and so on.

关键词： ECR ion source superconducting coil cryogenic system

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运动性骨骼肌微损伤的特性

中国组织工程研究与临床康复 2007年第19期11卷 3842-3845页

作者：魏源广州体育学院科学实验中心广东省广州市510500

目的:分析运动性骨骼肌微损伤的特性。方法:应用计算机检索HighWire Press1989-01/2006-12关于运动性骨骼肌微损伤的文章。检索词“musclemicro-damage”并限定文章的语言种类为English。同时利用计算机检索中国期刊全文数据库1989-01/2... 详细信息

目的:分析运动性骨骼肌微损伤的特性。方法:应用计算机检索HighWire Press1989-01/2006-12关于运动性骨骼肌微损伤的文章。检索词“musclemicro-damage”并限定文章的语言种类为English。同时利用计算机检索中国期刊全文数据库1989-01/2006-12的相关文章,限定文章语言种类为中文,检索词“运动性骨骼肌微损伤”。结果:运动后骨骼肌微损伤的发生的直接证据主要表现在运动对骨骼肌微结构和超微结构的影响,其间接证据主要表现在血液中肌肉酶活性和肌红蛋白含量增加、血液中C-反应蛋白含量升高、尿液中肌肉蛋白质分解产物增加和骨骼肌组织中炎症反应标志物增高。结论:了解运动性微损伤的特性可以预防和干预运动后微损伤的发生,为有效地预防延迟性肌肉酸痛提供理论参考。

关键词：骨骼肌微损伤延迟性肌肉酸痛肌肉微细损伤

温情的音乐与运动同步共振疗法最适合过劳人群

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中国组织工程研究与临床康复 2007年第52期11卷 10632-10635页

作者：陈勇嘉兴学院体军部浙江省嘉兴市314001

目的:探讨并设计与中国知识分子这一过劳群体相适用的,寓娱乐、健身、疗疾于一体的调节身心、摆脱疲劳、增进健康、治疗疾病的有效方法。从而拓展音乐与运动疗法的理论与方法。资料来源:应用计算机检索与手工查阅书籍二者结合,检索了在... 详细信息

目的:探讨并设计与中国知识分子这一过劳群体相适用的,寓娱乐、健身、疗疾于一体的调节身心、摆脱疲劳、增进健康、治疗疾病的有效方法。从而拓展音乐与运动疗法的理论与方法。资料来源:应用计算机检索与手工查阅书籍二者结合,检索了在中国学术期刊全文数据库于2004-01/2006-09期间与音乐疗法相关的文章;以及中国医药健康保健网网站。前者检索词为音乐疗法,后者为亚健康。资料选择:通过阅读文章的文题和大部分文章的摘要,筛除明显不相关的内容,入选资料主要是音乐疗法的基础研究和保健养生及临床应用的文献,少数是亚健康和运动疗法相关的文献,然后查找全文。资料提炼:共收集到音乐疗法的有关基础、保健养生及临床实践研究的原著文献168篇,从中筛除不相关的116篇,排除重复性研究39篇,对剩余13篇和相关书刊4篇及1个网页资料进行分析。资料综合:在音乐与运动同步共振疗法中,由运动产生的振动和强身效果显而易见。作者在原乐理和运动原理的基础上作了拓展,使音乐与运动能巧妙地组合在一起,这是创造性地应用而产生的一种新疗法。音乐共振疗法的机制可能与人体许多生理活动,如心跳、脉搏,肺的张缩,胃肠蠕动,脑与自律神经的节律电波等具有音乐的旋律有关。音乐疗法集生理和心理疗法为一体。娱乐的积极心情与音乐和运动同步可以提高人体健康,加强人体免疫力。结论:温情的音乐与运动同步共振疗法,是集生理和心理疗法为一体的一种时尚疗法,是过劳人群亚健康时期比较适用的调节与治疗方法之一。

关键词：过劳人群亚健康音乐运动同步共振疗法

A method for solving relative dispersion of the cloud droplet spectra

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Science China Earth Sciences 2015年第5期58卷 929-938页

作者： LIU yu LI WeiLiang Chinese Academy of Meteorological Sciences

The relative dispersion of the cloud droplet spectra or the shape parameter is usually assumed to be a constant in the two-parameter cloud microphysical scheme, or is derived through statistical analysis. However, observations have revealed that the use of such methods is not applicable for all actual cases. In this study, formulas were derived based on cloud microphysics and the properties of gamma function to solve the average cloud droplet radius and the cloud droplet spectral shape parameter. The gamma distribution shape parameter, relative dispersion, and cloud droplet spectral distribution can be derived through solving the droplet spectral shape parameter equation using the average droplet radius, volume radius, and their ratio, thereby deriving an analytic solution. We further examined the equation for the droplet spectral shape parameter using the observational droplet spectral data, and results revealed the feasibility of the method. In addition, when the method was applied to the two-parameter cloud microphysical scheme of the Weather Research and Forecast(WRF) model to further examine its feasibility, the modeling results showed that it improved precipitation simulation performance, thereby indicating that it can be utilized in two-parameter cloud microphysical schemes.

关键词： cloud droplet spectrum gamma distribution relative dispersion shape parameter average radius

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Exact elastic impedance tensor for isotropic media

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Science China Earth Sciences 2015年第6期58卷 1350-1360页

作者： ZHANG Feng LI Xiangyang State Key Laboratory of Petroleum Resource and Prospecting China University of Petroleum

The existing expressions of elastic impedance,as the generalized form of acoustic impedance,represent the resistance of subsurface media to seismic waves of non-normal incidence,and thus include information on the shear-wave *** this sense,conventional elastic impedance is an attribute of the seismic reflection and not an intrinsic physical property of the subsurface *** derivation of these expressions shares the approximations made for reflectivity,such as weak impedance contrast andisotropic or weakly anisotropic media,which limits the accuracy of reflectivity reconstruction and seismic *** this paper,we derive exact elastic impedance tensors of seismic P-and S-waves for isotropic media based on the stress-velocity *** componentof the impedance tensor represents a unique mechanical property of the *** of P-wave elastic impedance tensor components are discussed for seismic inversion and *** to synthetic data and real data shows the accuracy and robust interpretation capability of the derived elastic impedance in lithology characterizations.

关键词： stress tensor velocity tensor elastic impedance inversion reservoir characterization

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