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Search Results: 1 - 10 of 254312 matches for " 张琦 "
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资源约束下我国循环经济发展战略探讨

资源科学 , 2006,
Abstract: 中国经济已经从短缺经济阶段、剩余经济阶段进入到了资源约束经济新阶段,当前面临矛盾是:经济增长是以牺牲大量资源为代价;受世界经济波动风险影响增大;越来越多的经济贸易摩擦给中国经济造成了巨大损伤;生态环境日益恶化给未来经济持续增长构成严重阻碍,经济安全风险增大、也造成国家安全隐患。因此,本文提出推进循环经济发展模式不仅是必然选择,而且要从以下几个方面进行战略性调整:从指导思想上用“以经济持续增长为重心”替代“以经济建设为重心”;建立以绿色GDP为核心的国民经济核算体系;建立科学规范的政府考核评估指标体系;建立推进循环经济的产业技术标准、市场准入标准和科技创新体制和技术创新体系;改革和完善我国资源产权制度,推进循环经济的利益补偿机制的建立;从思想上彻底实现观念转变,树立循环经济发展的节约型习惯和行为方式。
国际式工业建筑空间风格的构成

工业建筑 , 2009, DOI: 10.13204/j.gyjz200905010
Abstract: 国际式工业建筑空间风格是现代主义建筑运动发展的一个组成部分,是国际式建筑风格的延续和极至的发展阶段。通过回顾国际式风格形成的社会背景,剖析国际式风格形成、发展的过程,诠释国际式工业建筑空间风格构成的主要因素,探讨国际式风格对当今我国工业建筑设计风格的影响。
对新形势下国际赠书转运工作的探讨
 
图书馆工作与研究 , 2013,
Abstract: ?本文以南开大学图书馆国际赠书转运站工作为研究对象,分析了到站赠书的特点以及我国接收赠书现状,揭示国际赠书工作发展的新趋势,就如何更好的开展赠书转运工作进行了分析和讨论。
现阶段我国社会游资的疏导与管理探讨

天府新论 , 1998,
Abstract:
方相氏源流考

天府新论 , 2008,
Abstract: 方相氏是上古礼制中的重要神礻氏,其历史传承按照上古以来的两条脉络进行:傩仪与葬礼。随历史演进,其地位在历代宫廷傩仪中逐步降低,以至于消失,而在民间则存留下来。在古代葬礼中,方相氏逐步演化为两个民间神礻氏,即开路神与显道神,为葬礼之前驱。
从肝论治崩漏浅谈
,
中国中医药信息杂志 , 2001,
Abstract:
浓香型白酒蒸馏过程中挥发性风味物质的变化规律

- , 2018, DOI: 10.13982/j.mfst.1673-9078.2018.6.034
Abstract: 建立直接进样结合气相色谱-质谱法(Gas Chromatography-Mass Spectrometry,GC-MS),分别对100年、300年窖龄窖池的酒醅在蒸馏过程中挥发性物质变化规律进行研究,准确定性浓香型白酒中70种典型挥发性化合物,包括酯类39种,醇类14种,酸类6种、烷烃类3种,醛酮类5种,其他3种;其中46种化合物属于两个不同窖龄窖池酿造白酒中的共有成分。同时,在蒸馏过程中,丙二醇、2,3-丁二醇、乙酸、苯乙酸乙酯、十四酸乙酯、棕榈酸乙酯、油酸乙酯和亚油酸乙酯均呈上升的趋势;辛酸乙酯、丁酸己酯、己酸丁酯、庚酸乙酯、乙酸己酯、丁酸丁酯、戊酸乙酯、乙酸异戊酯、正丁醇、戊醇、2-甲基丁醇呈下降的趋势;己酸、丁酸、己醇、辛醇均增加。本研究初步阐释了不同窖龄馏分酒中风味物质的含量差异,发掘了不同馏分酒蒸馏过程中风味物质含量与流酒时间之间的关系,为酒企科学蒸馏、质量摘酒和分级贮存提供了科学数据。
A direct injection combined with Gas Chromatography-Mass Spectrometry (GC-MS) was established to study the variation of volatile substances in the distilled fermented grains with 100 years and 300 years, and 70 volatiles compounds in Luzhou flavor liquor were indentified, including 39 esters, 14 alcohols, 6 acids 3 alkanes, 5 aldehyde ketones and other 3 compounds, in which 46 compounds were found out both in the two kinds of liquors. In the process of distillation, propylene glycol, 2,3-butanediol, acetic acid, phenyl ethyl acetate, ethyl myristate, ethyl palmitate, ethyl oleate and ethyl linoleate were all rising, and ethyl caprylate, hexyl butyrate, butyl caproate, ethyl heptanoate, hexyl acetate, butyrate butyrate, ethyl pentanoate, isoamyl acetate, n-butyl alcohol, n-amyl alcohol and 2-methyl butanol showed a decreasing trend. In addition, hexanoic acid, butanoic acid, 1-hexanol, 1-octanol showed an increasing trend. The study initially investigated the difference of flavor substances in the distillation liquor from different pit ages, and explored the relationship between the content of flavor substances and the flow time of liquor in the distillation process of different distillates. The results provided a scientific basis of liquor distillation, efficiently liquor selection and optimized storage.
UPLC-MS/MS测定油蒿叶片中4种内源植物激素
Determination of Four Endogenous Phytohormones in Artemisia ordosica Leaves by Ultra-Performance Liquid Chromatography-Tandem Mass Spectrometry
 [PDF]

邓文红,
Botanical Research (BR) , 2015, DOI: 10.12677/BR.2015.41001
Abstract:
本文以菊科植物油蒿(Artemisia ordosica)为研究材料,采用超高效液相色谱串联质谱法对叶片中的植物激素进行分析,以探讨植物组织中的植物激素鉴定方法。油蒿叶片经异丙醇–水–盐酸(2:1:0.002, V/V/V)浸提,二氯甲烷萃取,反相C18柱分离,流动相为0.1%的乙酸水溶液和乙腈,梯度洗脱。多反应监测离子模式进行定性和定量分析,外标法定量。用该方法测定吲哚-3-乙酸、脱落酸、赤霉素和茉莉酸4种内源植物激素的回收率高于94.0%,精密度和重现性均较好(相对标准偏差为0.92%~1.56%)。对实际植物样品的分析也取得了较理想的结果,表明该方法完全适用于植物样品中植物激素含量的检测。
Four endogenous phytohormones, indole-3-acetic acid, abscisic acid, gibberellins and jasmonic acid in the leaves of Artemisia ordosica were examined by ultra performance liquid chromatogra-phy-tandem mass spectrometry (UPLC-MS/MS) to provide effective and reliable methods for iden-tification of phytohormones in plants. The four analytes were extracted from A. ordosica leaves by isopropanol-water-hydrochloric acid (2:1:0.002, V/V/V), and partitioned by dichloromethane, and then separated by Agilent C18 column with gradient elution using acetonitrile and 0.1% acetic acid in water as mobile phases. Negative electrospray ionization with multiple reaction monitor mode was used in the detection. External standard method was used to quantify the analytes concentra-tions. The recoveries of this method were higher than 94.0%, and the relative standard deviations were 0.92% - 1.56%. The results showed that phytohormones was well separated, and the ideal quantitative data of phytohormones in A. ordosica leaves were obtained, and this method suited the purpose of the determination for phytohormones in plant material.
钻孔应变差应变耦合系数反演与有关机理的探讨
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大地测量与地球动力学 , 2012,
Abstract: 研究反演分量式钻孔应变差应变耦合系数的方法,采用考虑方位角校正和相位滞后影响两种计算模型,计算结果显示大多数测站采用两种方法反演的耦合系数均比较相近,相位滞后、方位角校正以及拟合残差的结果相对稳定;但是有部分测站的差应变相位滞后偏离较大,从而导致采用两种方法反演的耦合系数差异较大。结合测站周边的构造分布,对可能导致该现象的物理机制进行了探讨。
Technical implementation of distributed mobile GIS based on LBS
基于LBS应用的分布式移动GIS技术实现

卜健,
重庆邮电大学学报(自然科学版) , 2004,
Abstract: 分布式移动地理信息系统是传统GIS在21世纪移动互联网时代发展的新方向。笔者分析了应用于 空间定位服务(LBS)的分布式移动地理信息系统(DM-GIS)的原理>特点和有关关键技术,提出了应用 DM-GIS技术的解决方案。
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