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Search Results: 1 - 10 of 68221 matches for " 冉秋红 "
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知识经济时代企业成本的核算与管理创新

科技进步与对策 , 2001,
Abstract: 在知识经济时代,知识成为最主要的生产要素,知识成本构成企业产品成本的一个重要组成部分。产品成本结构发生变化,客观上要求成本核算与管理的内容与方法应有所创新。智力资产的计价、知识成本的核算以及与知识管理相适应的成本管理新视角成为这一时代企业不容忽视的问题。知识经济智力资产知识成本成本管理企业成本核算管理创新
企业智力资本结构与自主创新绩效
,任重
科技进步与对策 , 2012, DOI: 10.6049/kjjbydc.2012040361
Abstract: 基于当前企业智力资本对自主创新的重要影响,以及资本结构与创新战略的已有研究成果,提出并探讨了智力资本结构影响自主创新绩效这一研究主题。分析了协调优化的智力资本结构,能够支撑与促进组织自主创新顺利进行,提升自主创新绩效的内在机理。运用数据包络分析(DEA)方法,根据各地大中型企业创新投入与产出的数据信息,较为直观地验证了这一机理。最后,在此基础上提出了相应的政策建议。智力资本结构创新绩效内在机理数据包络分析(DEA)政策建议
我国上市公司多元资本结构及其绩效影响研究
,陶莎,唐晓
科技进步与对策 , 2013, DOI: 10.6049/kjjbydc.2013100123
Abstract: 进入知识经济时代,企业的智力资本(知识资本)取代财务资本而成为关键要素资本。因而相对于传统财务资本结构而言,包括智力资本在内的多元资本结构能显著提升企业的价值创造能力。利用我国上市公司2000-2012年的财务数据进行实证分析,结果表明,近12年智力资本与财务资本的比例呈现出较显著的增长趋势,说明企业智力资本的增长幅度高于财务资本的增长幅度。并且,该多元资本结构对企业绩效具有正向、积极的促进作用。这一研究结果验证了企业资本以及资本结构变化的相关理论阐述,对于完善国家宏观投资政策以及企业多元资本投资组合与管理决策具有一定的参考价值。上市公司智力资本多元资本资本结构企业绩效
CE-1立体相机与激光高度计数据联合平差
赵双明,晓雅,付建,
测绘学报 , 2014, DOI: 10.13485/j.cnki.11-2089.2014.0178
Abstract: CE-1三线阵立体相机和激光高度计主要用于获取月球形貌信息.CE-1沿轨运动过程中,可同时获取高分辨率的三线阵扫描影像和高精度的激光测高数据.在分析立体影像与激光高度计数据不一致性的基础上,为提高定位精度,将激光测距数据引入三线阵立体影像光束法平差处理.本文提出一种改进的外定向参数模型,采用3阶Lagrange多项式模型(LPM)建立外定向线元素内插模型,采用四元数球面线性内插建立外定向角元素模型,并根据改进模型建立激光高度计数据与影像数据的联合平差数学模型.试验表明,本文立体相机和激光高度计数据联合平差模型是有效的.
解读《尘劫记》序文
The Understanding of “Jinkouki” Preface
 [PDF]


Advances in Social Sciences (ASS) , 2015, DOI: 10.12677/ASS.2015.44037
Abstract:
《尘劫记》是日本江户时代的和算家吉田光由以中国明代数学家程大位的《算法统宗》等中国数学著作为参考创作的实用数学著作,曾对日本社会产生过巨大影响。该书不仅内容上全盘学习中国数学,而且文中对中国数学和中国文化的引据亦随处可见。本论文旨在通过文化的视点,分析吉田在序文中所引据的与中国数学和中国文化相关的经典的来源及用意,探究中国古代数学作为实用科学被日本学者习得的具体过程,以及对日本社会生活产生的深远影响,以期对这个少有中国学者问津的课题起到抛砖引玉的效果。
“Jinkouki”, which was written by Yoshida Mituyoshi, an expert of Japanese mathematics, referred to Cheng Dawei’s “Suanfa Tongzong” and other Chinese mathematics books, had a huge impact on Japanese society. Not only the content completely learned Chinese mathematics, we can also see a lot about Chinese culture in the book everywhere. This paper aims to analyze what and why Yoshida had referenced classical Chinese culture in the preamble through the cultural point of view, in order to explore the process that Japanese scholars learned ancient Chinese mathematics, and the profound influence on Japanese social life which was given by Chinese mathematics. The aim of thesis is to offer a few commonplace remarks by way of introduction so that others may come up with valuable opinions about the study.
葡萄叶提取物对葡萄霜霉病的防治作用及有效成分分析
Control of grape downy mildew with extracts of grape leaves and analysis of its effective components

杨佳瑶,张敏,,甄志先,,隆贤,Yang Jiayao,Zhang Min,Shen Hongmiao,Zhen Zhixian,Bi Qiuyan,Ran Longxian
- , 2018, DOI: 10.13802/j.cnki.zwbhxb.2018.2017113
Abstract: 为探究葡萄叶提取物对葡萄霜霉病的防治作用,测定了葡萄叶提取物及其有效物质对葡萄生单轴霉Plasmopara viticola孢子囊和游动孢子的抑制作用以及对葡萄霜霉病的防治效果,观察了其对葡萄生单轴霉在叶片中扩展、产生孢子囊能力的影响,并对葡萄叶提取物组成成分进行了分析。结果表明,葡萄叶提取物对葡萄生单轴霉孢子囊的形成和萌发均有明显的抑制作用。当葡萄叶提取物浓度为10mg/mL时,其对孢子囊形成的抑制率为82.4%,葡萄生单轴霉孢子囊和游动孢子的萌发率仅为7.6%和1.1%,均显著低于菌水处理。荧光显微观察发现,葡萄叶提取物可以抑制葡萄生单轴霉在叶片内的扩展。当葡萄叶提取物浓度为10 mg/mL和50 mg/mL时,对葡萄霜霉病的室内防治效果分别为80.1%和100.0%;且浓度为10 mg/mL的葡萄叶提取物对葡萄霜霉病的田间预防效果为67.8%,与烯酰吗啉处理显著差异。液质联用技术检测显示,葡萄叶提取物中含有白藜芦醇和紫檀芪,其对葡萄生单轴霉均有显著的抑制作用,且紫檀芪的抑制效果强于白藜芦醇。
In order to explore the control effects of grape leaf extract (GLE) on grape downy mildew, the inhibitory effects of GLE and its effective components on sporangia and zoospores of Plasmopara viticola, and the control of grape downy mildew were determined, the spreading process of P. viticola in tissue of grape leaves and sporangial production were observed, and main active components of GLE were analyzed as well. The results showed that GLE had a strong inhibition effect on production and germination of sporangia of P. viticola. GLE significantly reduced sporangial production of P. viticola, with inhibition rate of 82.4% at 10 mg/mL, and germination rates of sporangia and zoospores were 7.6% and 1.1% at 10 mg/mL, both significantly lower than that of sterilized water. GLE could suppress the hyphae of P. viticola growth in the tissue of grapevine leaves based on observations under epi-fluoresence microscope. The control effect of GLE at 10 mg/mL and 50 mg/mL on grape downy mildew in vitro was 80.1% and 100.0%, respectively. The field preventive efficiency of GLE on grape downy mildew was 67.8% at 10 mg/mL, with no significant difference from that of dimethomorph. The active components of GLE contained resveratrol and pterostilbene by high performance liquid chromatography-mass spectrometry analysis, and they both had significant inhibition effects on P. viticola, but the inhibitive ability of pterostilbene was stronger than that of resveratrol.
凡纳滨对虾繁殖性状的SNP分子标记筛选的初步研究
,
上海海洋大学学报 , 2018, DOI: 10.12024/jsou.20180402287
Abstract: 对虾繁殖性状的相关分子遗传标记一直是甲壳动物中研究极少的部分,为了筛选与凡纳滨对虾(Litopenaeus vannamei)繁殖性状(产卵与产卵量)相关的SNP(Single Nucleotide Polymorphism,SNP)分子标记,为凡纳滨对虾的良种选育提供参考,选择卵黄蛋白原(vitellogenin,VG)基因作为筛选基因。本实验采用PCR产物直接测序法对VG基因进行SNP位点筛查,并与繁殖性状进行关联分析。结果表明:(1)在150个凡纳滨对虾样品中,VG基因的4个结构域一共可以检测到37个SNP位点,8个能引起蛋白质氨基酸的同义突变,3个错义突变,26个义突变。(2)对37个位点进行分析,发现4个可能的SNP候选位点。(3)多态性分析结果显示,4个候选位点都在中等多态水平,多态信息较为丰富。(4)对4个候选位点与产卵次数、产卵总量、平均产卵量和单位体质量产卵量繁殖性状进行单因素方差分析,结果显示位点3 839与总产卵量和单位体质量产卵量存在显著性差异(P < 0.05),其他位点不存在显著差异(P > 0.05)。
Molecular markers related with spawning traits in shrimps is limited. At present study, vitellogenin (VG) gene of Litopenaeus vannamei was selected for SNP (Single Nucleotide Polymorphism) marker screening on spawning traits (ie. spawn or not & egg number). Direct sequencing of VG gene was used for SNP loci screening. The detected SNP loci were further correlated with spawning traits. The experiment was based on 150 ablated female shrimps and the four domains of VT gene. During the discovered 37 SNP loci, there were 3 missense mutation, 8 synonymous mutation and 26 nonsense mutation. Further analysis found 4 potential SNP loci whose polymorphism information content (PIC) were between 0.31-0.36 indicated their middle standard of PIC. Single-factor ANOVA analysis was used for the reproductive variables (number of spawns, total egg number, average egg number, and egg number per body weight). Only the locus 3 839 showed the significance difference on total egg number and egg number per body weight (P < 0.05), no significance differences were found in the other 3 potential loci.
论科技期刊编辑人员的岗位优化管理
强辉?,何剑
天津体育学院学报 , 1998,
Abstract: 运用现代管理学与编辑学的有关理论,针对科技期刊管理工作存在的不足,论述了对编辑人员实施岗位优化管理时应注意的几个问题,即编辑人员的优化组合;聘任制;考查制;岗位责任制;奖惩制;进修制。
提高斜拉索索力估算精度的一种新方法
,李乔
公路交通科技 , 2007,
Abstract: 根据斜拉桥拉索振动的特点,建立了考虑垂度及斜度影响的振动微分方程,并利用奇异摄动解法进行求解。不仅考虑了索的刚度,而且将索的边界条件假定为简支和固支耦合的情况,在此基础上提出了频率法的索力计算实用公式。分析比较了目前国内外的其他主要计算公式,结果表明该公式具有高精度和计算方便的特点。将该实用计算公式用于南京长江三桥施工控制中,通过对实际斜拉索测试得到的各阶频率进行计算,并与设计索力和压力传感器得到的索力进行对比分析。计算表明该公式能够满足实际工程的需要,可广泛适用于频率法测估各种索类结构的内力。
中国非金属超大型矿床分布规律及成矿地质特征
曹俊臣,
地质与勘探 , 1996,
Abstract: 本文对中国非金属超大型矿床的种类、规模、时空分布规律、矿床成因类型与含矿建造,以及与中国板块构造和地壳演化史的关系进行了讨论,并与国外同类矿床做了对比。
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