共查询到20条相似文献,搜索用时 31 毫秒
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建设工程量清单编制是我国工程造价管理中的一项重要工作。本文介绍了2种常用的工程造价管理模式,比较其优劣;在此基础上提出建筑工程工程量清单的编制要点,包括清单项目的设置,项目特征的描述,以及工程量的计算等;推出了工程量清单复核的步骤和方法。 相似文献
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通过对2005年夏播玉米生育中后期的气象条件分析,得出玉米拔节前后和抽穗、开花吐丝期的阴雨寡照是造成2005年夏播玉米出现空秆、畸形穗的主要原因,高温、高湿是辅助因素。 相似文献
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不同生态型玉米生长特点的研究 总被引:3,自引:0,他引:3
在海拔600m处夏播玉米,对平丘紧凑型(A)、平丘平展型(B)、低山中熟型(C)、中山晚熟型(D)和高山早熟型(E)5个生态型玉米品种生长特点的研究表明:(1)D生态型的植株和穗位最高、穗高系数最大、叶数最多、单叶和单株面积最大、生育期最长、单株干物重最大,E生态型的这些值最小,其他生态型介于它们之间;(2)后期时间系数、后期干物质积累系数和后期净同化率的变化规律是E型>A型>B型>C型>D型;(3)收获指数A型>B型、E型>C型>D型,分配指数B型>C型>A型>E型>D型。不同生态型玉米品种具有不同的植株生长、干物质积累和分配特点,这与各品种的地域来源、所适应的生态环境以及所处的育种阶段有关。 相似文献
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财务报告分析是了解过去、评价现在、预测未来,帮助利益关系集团改善决策的一种重要手段。本文介绍了上市公司财务报告分析的主要内容,分析了财务报告分析中存在的不足,并提出了提高上市公司财务报告分析质量的若干措施。 相似文献
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对云南省蒙自县石榴品种园中来源于全国石榴产区的 36 个石榴(Punica granatum L.)品种, 在相同栽培条件, 相同树龄, 均达到成熟的果实进行可溶性糖含量、 有机酸含量、 可溶性固形物含量、 籽粒硬度等指标进行测定与分析。 结果表明: ‘天红蛋’ 等 29 个石榴品种中达到优良, 适合在蒙自栽培发展; ‘净皮甜’ 等 9 个品种适合作为水果鲜食类在当地栽培; ‘酸绿籽’ 等 8 个作为有机酸含量高的酸石榴品种, 适合作为药用类在当地栽培。 结果为当地石榴栽培品种的选择奠定了基础。 相似文献
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This paper presents the influence of the gage length on the kenaf fiber Young’s modulus and the tensile strength characterization. Four different gage lengths of 10 mm, 15 mm, 20 mm and 25.4 mm are selected in this study and the tensile testing is performed at a quasi-static loading rate of 1 mm/min. The cross-sectional area of the fiber after failure is considered for the stress calculations. Weibull probability distribution is used to characterize the tensile strength of the kenaf fiber. The Weibull parameters are obtained for the two parameter, three parameter and Weibull of Weibull models and the average tensile strength of the fibers are evaluated. The predicted average tensile strength from all the three approaches are in good agreement with the experimental results for the obtained parameters. 相似文献
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豆科植物应用价值综述 总被引:1,自引:0,他引:1
豆科植物广布世界各地,用途广泛。从食用尧饲用、药用、肥用、生态用、园林绿化美化、材用等方面就其应用价值进行了综述,并对其应用前景做了展望。 相似文献
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Gerrit J. Gerwig Henry G. Hocking Reto St?cklin Johannis P. Kamerling Rolf Boelens 《Marine drugs》2013,11(3):623-642
Conotoxins are small peptides present in the venom of cone snails. The snail uses this venom to paralyze and capture prey. The constituent conopeptides display a high level of chemical diversity and are of particular interest for scientists as tools employed in neurological studies and for drug development, because they target with exquisite specificity membrane receptors, transporters, and various ion channels in the nervous system. However, these peptides are known to contain a high frequency and variability of post-translational modifications—including sometimes O-glycosylation—which are of importance for biological activity. The potential application of specific conotoxins as neuropharmalogical agents and chemical probes requires a full characterization of the relevant peptides, including the structure of the carbohydrate part. In this review, the currently existing knowledge of O-glycosylation of conotoxins is described. 相似文献
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对我国麻类生产质量安全的探讨 总被引:1,自引:0,他引:1
我国是世界上庥类生产、贸易大国。目前我国庥类生产加工中存在的主要问题:质量监控检测体系不健全,原料市场较乱,良种区域化程度低,初加工技术落后,庥纺织加工水平低。所以加强麻类质量监督检测体系建设,提高类庥检测手段,规范市场行为,加强优质育种,实行良种区域化,采用先进的加工技术,加强横向联合等是提高我国麻类生产质量水平和市场竞争力的主要对策。 相似文献
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Guy Fauconneau 《Plant foods for human nutrition (Dordrecht, Netherlands)》1983,32(3-4):205-223
The per capita levels of protein from various animal sources and from plant sources which are currently available for human consumption are presented and discussed. Changes in the patterns of consumption which occur as the standard of living is improved are documented for various countries. These patterns are used to suggest that increased production of plant protein alone will not necessarily be a solution to the problem of meeting increasing world needs for dietary protein. Products from plant protein sources need to be developed which will compete with animal protein sources. 相似文献
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阐述了无形资产的概念和科研单位无形资产的特点,分析中国热带农业科学院无形资产管理现状及存在的问题,提出加强其无形资产科学管理的对策。 相似文献
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