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哈利·波特与“混血王子”

作者： (英)j.k.罗琳(j.k.rowling)

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哈利·波特与火焰杯

作者： (英)j.k.罗琳(j.k.rowling)

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哈利·波特与凤凰社

作者： (英)j.k.罗琳(j.k.rowling)

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哈利·波特与魔法石

作者： (英)j.k.罗琳(j.k.rowling)

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哈利·波特与阿兹卡班囚徒

作者： (英)j.k.罗琳(j.k.rowling)

Prognostication of hydrocarbon generative potential in the onshore and offshore Niger Delta, Nigeria using TOC content and rock-eval pyrolysis techniques

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Chinese journal Of Geochemistry 2014年第2期33卷 138-144页

作者： Nyantakyi E.k. Li Tao Hu Wangshui Borkloe j.k. Nagre R.D. Civil Engineering Department Kumasi Polytechnic School of Earth Science Yangtze University Chemical Engineering Department Kumasi Polytechnic College of Petroleum Engineering Yangtze University

This article prognosticates the hydrocarbon generation potential of core samples from fields A, B, C and D in Niger delta, Nigeria. The objectives of this study are to characterize the quality of these core samples by organic geochemical analyses. A total of ten core samples collected from fields A, B, C and D in Niger delta were analyzed using total organic carbon(TOC) content analysis, rock-eval pyrolysis technique. The analytical results of the studied core samples reveal that they have generally high total organic carbon contents(TOC), suggesting that conditions in the Niger delta favour organic matter production and preservation. There is a variation in the kerogen types and this may be attributed to the relative stratigraphic positions of the core samples within the Niger delta. The rock-eval results indicate that the samples from fields C and D contain predominantly Type II kerogen with a capacity to generate oil and gas and hence have good generative potential. The samples from fields A and B contain mainly Type III kerogen and are gas-prone with moderate generative potential.

关键词：尼日尔三角洲热解技术尼日利亚生烃潜力 TOC 岩石潜力预测干酪根类型

Alfvn Waves in the Solar Wind

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空间科学学报 2013年第4期33卷 353-373页

作者： L. YANG j.k. CHAO Purple Mountain Observatory Chinese Academy of Sciences Nanjing 210008 key Laboratory of Solar Activity Chinese Academy of Sciences Beijing 100012 Institute of Space Science National Central University Jhongli 320

Alfvn waves are found to be ubiquitous in the solar *** progress in observational studies of the waves is reviewed to formulate a microscopic picture for the Alfvenic fluctuations. The main aspects of the observational properties of these waves,including the wave intervals, propagation,evolution,origin and generation,are *** Alfven wave heating and acceleration of the solar wind plasma are briefly *** relation of the waves to rotational and tangential discontinuities,magnetic decreases,and other relatively large-scale structures such as flux tubes/ropes,magnetic clouds and interplanetary coronal mass ejections in the solar wind is particularly ***,some remaining open questions are also indicated due to their fundamental importance of understanding of the physical nature of Alfven waves and the role of the waves in heating and accelerating the solar wind.

关键词： Alfven wave Solar wind Rotational Discontinuity(RD) Tangential Discontinuity(TD) Solar wind structures

First-principles Investigation of Bi Segregation at the Solder Interface of Cu/Cu_3Sn(010)

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journal of Materials Science & Technology 2010年第12期26卷 1057-1062页

作者： X.Y. Pang Z.Q. Liu S.Q. Wang j.k. Shang Shenyang National Laboratory for Materials Science Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China Department of Materials Science and Engineering University of Illinois at Urbana-Champaign IL 61801 USA

Density functional theory was employed to investigate the bismuth segregation at Cu/Cu3Sn（010） interface. Five initial constructions were introduced by adopting the adhesion energy criterion. Among them, the so-called ＂between-Cu＂ construction in which the interface Cu atoms of Cu slab locate along Cu-Cu bond direction in Cu3Sn slab was found to be the most energy-favored at an adhesion energy of 1.96 j/m^2. Based on this construction, five possible segregation sites were examined, and the most likely segregation site was determined with adhesion energy as low as 1.06 j/m^2, which was almost half of the initial one. Comparing with other sitest adhesion energies, it was concluded that size effect took a large part in embrittlement. The analyses of atomic structure and electronic density revealed that the slabs shifted away from interfaces due to bismuth segregation, and the atoms around Bi atom were Dressed away. This calculated work agreed aualitativelv with reported experimental results.

关键词： First-principles calculation Segregation Bismuth Interface SnBi solder

New Terms for Compact Form of Electroweak Chiral Lagrangian

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Communications in Theoretical Physics 2008年第3期49卷 723-724页

作者： ZHANG Hong-Hao YAN Wen-Bin j.k. Parry LI Xue-Song School of Physics and Engineering Sun Yet-Sen University Gunagzhou 510275 China Center for High Energy Physics ＆ Department of Physics Tsinghua University Beijing 100084 China Science College Hunan Agricultural University Changsha 410128 China Department of Physics and Astronomy State University of New York at Stony Brook New York 11794 USA

The compact form of the electroweak chiral Lagrangian is a reformulation of its original form and is expressed in terms of chiral rotated electroweak gauge fields, which is crucial for relating the information of underlying theories to the coefficients of the low-energy effective Lagrangian. However the compact form obtained in previous works is not complete. In this letter we add several new chiral invariant terms to it and discuss the contributions of these terms to the original electroweak chiral Lagrangian.

关键词： electroweak chiral Lagrangian beyond standard model