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复合词在言语产生的词汇通达中的表征 被引量:2
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作者 方杰 李小健 《心理科学进展》 CSSCI CSCD 北大核心 2009年第6期1116-1123,共8页
言语产生研究对于复合词的通达形成什么表征存在分歧。是形成整词表征还是分解为词素表征?用整词和词素频率效应考察,荷兰语的结果支持复合词的分离阶段通达模型和相应的分解表征假设,汉语和英语的结果支持复合词的独立网络通达模型和... 言语产生研究对于复合词的通达形成什么表征存在分歧。是形成整词表征还是分解为词素表征?用整词和词素频率效应考察,荷兰语的结果支持复合词的分离阶段通达模型和相应的分解表征假设,汉语和英语的结果支持复合词的独立网络通达模型和相应的整词表征假设。本文经过文献回顾指出,词汇表征不同于心理词典,语言、加工方式和加工通道都很可能造成复合词表征的差异。 展开更多
关键词 言语产生 复合词 词素 分解表征 整词表征
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2,4-二羟基二苯甲酮合镍(Ⅱ)配合物的合成及热分解动力学研究 被引量:5
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作者 魏先红 李萍 《化学世界》 CAS CSCD 北大核心 2006年第8期463-466,共4页
合成了一种新的镍(Ⅱ)配合物Ni(C13H9O3)2.2H2O,并用元素分析I、R、UV和摩尔电导分析等手段对配合物进行了表征,用热重-差热法(TG-DTG)研究了配合物的热分解动力学,得到第二步的动力学方程。结果表明,配体中羰基氧、邻位羟基氧与金属离... 合成了一种新的镍(Ⅱ)配合物Ni(C13H9O3)2.2H2O,并用元素分析I、R、UV和摩尔电导分析等手段对配合物进行了表征,用热重-差热法(TG-DTG)研究了配合物的热分解动力学,得到第二步的动力学方程。结果表明,配体中羰基氧、邻位羟基氧与金属离子配位,金属离子与配体的化学计量比为1∶2。配合物在动态空气气氛中第二步热分解由机理函数f(α)=1-α控制,反应速率方程为:dα/dt=5.295×109[exp(-105.61×103)/RT]×(1-α)。 展开更多
关键词 2 4-二羟基二苯甲酮 镍(Ⅱ)配合物 合成与表征 分解 非等温动力学
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探析话语的认知修辞格式 被引量:2
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作者 熊学亮 《天津外国语学院学报》 2008年第6期1-7,共7页
从古典的话语自然结构和功能结构的研究出发,概括了语义学由静态研究向动态研究演变的要素,指出当代认知动态语义学的一大突破是在古典话语功能结构理论基础上引入话语修辞结构和毗邻命题之间的逻辑关系等概念,从而产生了非线性的话语... 从古典的话语自然结构和功能结构的研究出发,概括了语义学由静态研究向动态研究演变的要素,指出当代认知动态语义学的一大突破是在古典话语功能结构理论基础上引入话语修辞结构和毗邻命题之间的逻辑关系等概念,从而产生了非线性的话语分析方式。比如,SDRT(分解式话语表征理论)可以解释许多传统语义学、逻辑学和话语分析理论不能解决的问题,因为SDRT可以在话语分析中缺省性地模拟话语的认知状态,如遇到与缺省知识相悖的信息,可用更新逻辑来重新建立命题或言语行为之间的修辞关系,并用粘合逻辑来进行细度描述,因此可以对表层不连贯或句间得不到关联解释的话语结构的建制状况和推理状况进行精度非常高的模拟。 展开更多
关键词 动态语义学 认知 修辞 非线性的 分解式话语表征理论
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Isolation and Properties Characterization of Biosurfactant Synthesized by Pyrene Degrading Bacillus subtilis C19
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作者 Anondho Wijanarko Hanif Yuliani +1 位作者 Heri Hermansyah Muhamad Sahlan 《Journal of Chemistry and Chemical Engineering》 2012年第10期889-896,共8页
Bacillus subtilis strain C19, capable of ulilizing pyrene as a sole of carbon and energy, was isolated from marine Indonesian Archipelago. In biodegradation of pyrene by B. subtilis C19, various metabolites was isolat... Bacillus subtilis strain C19, capable of ulilizing pyrene as a sole of carbon and energy, was isolated from marine Indonesian Archipelago. In biodegradation of pyrene by B. subtilis C19, various metabolites was isolated and identified by chromatographic and spectral analyses. Lipopeptide biosurfactant was produced and it has stable emulsification activity. Biosurfactant was produced for enhancing pyrene uptake and bioavaibility. After 30 days incubation, there were no toxic metabolite and biodegradation of pyrene was already complete (only 0.02% undegradable metabolite). Therefore, this strain is suitable for PAHs (polyaromatic hydrocarbons) contaminated environment recovery. 展开更多
关键词 BIOEMULSIFIER Bacillus subtilis PYRENE BIODEGRADATION characterization.
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Expression, Characterization and Antimicrobial Ability of a Variant T4 Lysozyme in Pichia pastoris
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作者 Ning SUN Sanfeng CHEN +4 位作者 Xiangming XIE Yueju WANG Gangqiang LI Nan WANG Dehu LIU 《Agricultural Science & Technology》 CAS 2014年第3期321-325,共5页
T4 lysozyme was engineered with disulfide bonds and expressed in Pichia pastoris. The secreted proteins were purified and made into powder by lyophiliza-tion. Recombinant protein purity was more than 70% measured by H... T4 lysozyme was engineered with disulfide bonds and expressed in Pichia pastoris. The secreted proteins were purified and made into powder by lyophiliza-tion. Recombinant protein purity was more than 70% measured by HPLC. The lytic activity of variant T4-lysozyme was measured by the lysis of the cel wal of Xan-thomonas oryzae pv. oryzae, X. oryzae pv. oryzicola, Ralstonia solanacearum comb. nov, Clavibacter michiganensis subsp. michiganensis, X. campestris pv. mal-vacearum, Fusarium oxysporium sp. vasinfectum, Verticil ium dahliae kleb. Inhibition zone assay showed that variant T4 lysozyme significantly inhibited X. o. oryzicola and X. c. malvacearum. The antifungal activities of this protein against F. o. vasin-fectum and V. d. kleb were also analyzed. 展开更多
关键词 Antibacterial activity EXPRESSION Pichia pastoris T4 lysozyme VARIANT
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A relaxation scheme for a multi-class Lighthill-Whitham-Richards traffic flow model 被引量:6
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作者 Jian-zhong CHEN Zhong-ke SHI Yan-mei HU 《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》 SCIE EI CAS CSCD 2009年第12期1835-1844,共10页
We present a high-resolution relaxation scheme for a multi-class Lighthill-Whitham-Richards (MCLWR) traffic flow model. This scheme is based on high-order reconstruction for spatial discretization and an implicit-expl... We present a high-resolution relaxation scheme for a multi-class Lighthill-Whitham-Richards (MCLWR) traffic flow model. This scheme is based on high-order reconstruction for spatial discretization and an implicit-explicit Runge-Kutta method for time integration. The resulting method retains the simplicity of the relaxation schemes. There is no need to involve Riemann solvers and characteristic decomposition. Even the computation of the eigenvalues is not required. This makes the scheme particularly well suited for the MCLWR model in which the analytical expressions of the eigenvalues are difficult to obtain for more than four classes of road users. The numerical results illustrate the effectiveness of the presented method. 展开更多
关键词 Relaxation scheme Multi-class LWR model Traffic flow CWENO reconstruction Implicit-explicit Runge-Kutta
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Photoelectrode for water splitting: Materials,fabrication and characterization 被引量:6
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作者 Zhiliang Wang Lianzhou Wang 《Science China Materials》 SCIE EI CSCD 2018年第6期806-821,共16页
Photoelectorchemical(PEC) water splitting is an attractive approach for producing sustainable and environment-friendly hydrogen. An efficient PEC process is rooted in appropriate semiconductor materials, which shoul... Photoelectorchemical(PEC) water splitting is an attractive approach for producing sustainable and environment-friendly hydrogen. An efficient PEC process is rooted in appropriate semiconductor materials, which should possess small bandgap to ensure wide light harvest, facile charge separation to allow the generated photocharges migrating to the reactive sites and highly catalytic capability to fully utilize the separated photocharges. Proper electrode fabrication method is of equal importance for promoting charge transfer and accelerating surface reactions in the electrodes. Moreover,powerful characterization method can shed light on the complex PEC process and provide deep understanding of the rate-determining step for us to improve the PEC systems further. Targeting on high solar conversion efficiency, here we provide a review on the development of PEC water splitting in the aspect of materials exploring, fabrication method and characterization. It is expected to provide some fundamental insight of PEC and inspire the design of more effective PEC systems. 展开更多
关键词 PHOTOELECTRODE water splitting semiconductor material electrode fabrication CHARACTERIZATION
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