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Abstract: Voyage to the West is a novel recording the history of Zheng He's seven trips to the western seas and his visits to more than 30 countries in the Yongle era.
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提要：《西洋记》以明朝永乐年间郑和七下西洋、通使30余国事为线索，以小说的形式记述了这段历史。 |
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Abstract: Wangjiang county is a large agricultural county in cotton, grain crop and oil production.
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文摘:望江县是一个以生产棉粮油为主的农业大县。 |
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Abstract: Water environment is a very important part of natural geographical environment, and its change is bound to influence the evolution of society and culture because human society depends on water.
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文摘:水环境作为自然地理环境的一个重要组成部分，其变迁影响到人类社会、文化的演变，对地域文化的形成和发展起着重要的作用。 |
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Abstract: Water feature can play the special role in the landscape, can bring happy enjoy to the person, but is day by day short along with the water resources, how built is suitable for the person appreciates water feature becomes the question which each
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摘要：水景能够在景观中发挥特殊的作用，能够给人带来美好的享受，可是随着水资源的日益短缺，如何去营建适于人欣赏的水景成为每一个景观设计师所面临的问题，本文只是做了一个简单的分析及思考，希望能够起到一定的抛砖引玉的作用。 |
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Abstract: Water resource is a major limited factor for western develo p ment of China.
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文摘:实行西部经济大开发，水资源是制约的首要因素。 |
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Abstract: We can distinguish the evolvement of a institution into three kinds by institutional character of advantage, whether action without regard to institution have exterior nature or not, and the character of politics' institution: individual pattern
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内容提要：可以根据制度的利益中性和非中性，不遵守制度的行为是否具有外部性，以及政治制度的不同性质把单项制度的演化方式可以分为三类：个体式，协议式和强制式。 |
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Abstract: We conduct a theoretical study on the properties of a bound polaron in a quantum well under an electric field using linear combination operator and unitary transformation methods,which are valid in the whole range of electron-LO phonon coupling.
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文摘:采用线性组合算符及幺正变换方法研究了电场对量子阱弱耦合束缚极化子的性质的影响.推导出量子阱中束缚极化子的基态能量和库仑束缚势、电场和阱宽的变化关系.数值计算结果表明,基态能量因电场和库仑束缚势的不同而不同,随电场和库仑束缚势的增大而增大,随阱宽的增大而迅速减小. |
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Abstract: We documented a case of a young male Francois langur attacking humans near Lenglei village near Longgang Nature Reserve,Guangxi,on August 17,2002.Shortly after we parked our car and sounded its horn,a young male Francois langur rushed out of the
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文摘:2002年8月17日,对在广西弄岗国家级自然保护区附近楞垒自然屯发生的黑叶猴攻击人的事件进行实地考察.当小车发出鸣笛后,一只亚成体雄性黑叶猴从保护区边缘的丛林中冲出来.十分冲动或激怒地冲到了汽车旁,后来在路边的树上、石头、矮墙上不停地跳来跳去.围观群众躲到很远的地方观望,其中一人被扑到身上,幸好逃得及时而没有被咬伤.据访问了解,这只亚成体公猴从2001年初开始在保护区边界村庄附近已连续伤害了15个人和2只狗.分析和探讨这种攻击人类行为的形成是十分有意义的. |
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Abstract: We have studied the polarization beats spectroscopy with phase-conjugation geometry in a cascade three-level system.It was found that the accuracy for the energy-level difference measurement is determined by the homogeneous linewidths of the opt
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文摘:研究了级联三能级系统中的相位共轭极化拍频光谱术.发现其对能级差的测量精度决定于光学跃迁的均匀增宽.在符合拍频条件时，两独立光源拍频的频差可以超出激光线宽，激光绝对频率的测量精度可达到与激光线宽同一量级. |
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Abstract: We have studied the spontaneous emission from a three-level atom with an external-driving field in a photonic crystal.As a result of quantum interference and photon localization,the population in the two upper levels displays quasi-oscillatory o
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文摘:讨论了在双光子驱动场作用下，三能级原子在光子晶体中的自发发射问题.由于量子干涉和光的局域化作用，两个上能级中的占据数将具有周期振荡或准周期振荡的性质，这不仅依赖于两个上能级与禁带的相对位置，同时也依赖于原子的初始状态，而且还与驱动场的强度、驱动场的入射位相有关.这些性质既与真空中带有驱动场的原子的自发发射性质不同，也有别于无驱动场作用下光子晶体中三能级原子的自发发射性质. |
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Abstract: We have studied theoretically a beat effect in a four-level system due to fifth-order optical polarization,and considered the cases that the pump beams have either narrowband or broadband linewidth.We have found that the accuracy for the energy-
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文摘:研究了四能级系统中基于五阶极化的拍频效应，考虑了抽运光束为窄带线宽或宽带线宽的情形.发现其对能级分裂的测量精度决定于光学跃迁的均匀增宽.也就是说，这种技术在测量与基态是偶极禁戒跃迁的两激发态之间的能级分裂时，可得到消除多普勒增宽的精度. |
