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本文研究了以种胚为外植体西伯利亚杏器官分化各阶段的培养条件以及影响因素,并在愈伤组织上诱导出幼苗。为山杏的进一步研究和利用提供了方法和材料。 相似文献
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运用文献资料、实地走访与田野调查等方法,对花腰彝女子舞龙活动的历史渊源、社会变迁、保护与发展传承等进行深入研究,探讨其内涵特征与体育社会价值意义。研究表明:花腰彝女子舞龙活动起源于神话祭祀活动和英雄祖先崇拜,具有浓烈的宗教气息;嬗变至今,经历了萌芽状态、习俗养成、飞速发展并蜚声海内外、文化品牌确立等4个阶段,值得深入挖掘和开发利用研究。需注重彰显其文化内涵,提炼其价值意义,建构科学合理的可持续发展模式与传承路径。 相似文献
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Multiparty quantum secret conference based on quantum encryption with pure entangled states
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We present a scheme for multiparty quantum remote secret conference
(MQRSC) with pure entangled states, not maximally entangled
multipartite quantum systems. The conferees first share a private
quantum key, a sequence of pure entangled states and then use them
to encode and decode the secret messages. The conferees exploit the
decoy-photon technique to ensure the security of the transmission of
qubits. This MQRSC scheme is more feasible and efficient than
others. 相似文献
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综合运用有机岩石学、有机地球化学等方法,以井下暗色泥岩的分析资料为主,研究和分析了鄂尔多斯盆地西缘石沟驿地区下二叠统烃源岩的有机质生烃特征和沉积环境。研究结果表明:太原组、山西组暗色泥岩和煤为二叠系主要的烃源岩层系,有机质类型以Ⅲ型为主,早二叠系烃源岩已不同程度地进入成熟—高成熟阶段。 相似文献
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从规划的角度出发,结合近年参与中心镇总体规划的经历,对小城镇发展进行了剖析,指出在规划编制过程中存在的一些不切实际的问题。并针对这些问题提出一些解决问题的措施和建议。 相似文献
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This paper presents a scheme for high-capacity three-party
quantum secret sharing with quantum superdense coding, following
some ideas in the work by Liu et al (2002 Phys. Rev. A
65 022304) and the quantum secret sharing scheme by Deng
et al (2008 Phys. Lett. A 372 1957). Instead of using
two sets of nonorthogonal states, the boss Alice needs only to
prepare a sequence of Einstein--Podolsky--Rosen pairs in
d-dimension. The two agents Bob and Charlie encode their
information with dense coding unitary operations, and security is
checked by inserting decoy photons. The scheme has a high capacity
and intrinsic efficiency as each pair can carry 2lbd bits of
information, and almost all the pairs can be used for carrying
useful information. 相似文献
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The protocol using spatial entanglement to purify polarization entanglement by entanglement transformation between different degrees of freedom in a realistic environment is elaborated. Our analyses show that the bit-flip error can be completely purified, but the pure maximally entangled state can not be obtained ultimately if the spatial entanglement is impure. The fidelity of the purified state is decided by the spatial entanglement. Furthermore, this protocol can also be extended to purify the multi-particle Greenberg—Horne—Zeilinger (GHZ) state. It is presented that the spatial entanglement can be served as another source to improve the quality of entanglement. 相似文献