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Search Results: 1 - 10 of 313718 matches for " 王天 "
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关于资金价格双轨制并轨思路的研究
A Study on the Merger of Dual-Track of Capital Price
 [PDF]

李正刚,
Finance (FIN) , 2012, DOI: 10.12677/FIN.2012.24019
Abstract: 管制利率在反应资金价格方面存在失真,不能正确反应资金市场上供求双方的力量。近年来,虽然随着利率市场化改革的不断深化,我国在货币市场上已经基本实现了利率的市场化,但我国的存贷款利率仍然是管制利率,即我国的利率体系呈现出价格“双轨”并行的现象。作者认为,利率市场化不仅要体现在货币市场的利率上,也要表现在存贷款利率上。因此资金价格“双轨”并轨是我国的必然选择。
Control rates can not correctly reflect the price of capital and the strength of the market supply and demand sides. In recent years, with the interest rate market reform continued to deepen, China’s money market interest has been largely achieved on the market, but China’s deposit and lending rates are still controlled interest, so interest rate system in China showing a price on the “dual track” parallel phenomenon. Authors believe that the interest rate market not only reflected in the money market interest rates, but also reflected in the deposit and lending interest rates. Therefore, the merger of Dual-Track of capital price is an inevitable choice in China.
采场顶板稳定性的非线性可拓综合评价
Nonlinear Extension Synthesize Evaluation of Stope Roof Stability
 [PDF]

春祥,, 高峰
Advances in Geosciences (AG) , 2014, DOI: 10.12677/AG.2014.45040
Abstract:
可拓学作为一门新兴学科,在工程实践中得到越来越广泛的应用。本文采用非线性可拓综合评价方法对矿山采场顶板稳定性进行评价。通过分析影响采场顶板稳定性的相关因素,选取了有代表性的特征因子建立可拓评价的物元模型。应用物元模型对选取的实际采场通过关联度计算进行了综合评价,取得了满意的效果。
Extenics as a new discipline has been widely used in more and more engineering projects. In this paper, nonlinear extension synthesize evaluation method is used for stope roof stability evaluation in mine. By analyzing influence factors of roof stability, extension evaluation matter-element model was established based on the characteristic factor. Then by calculating the degree associated with a series of processing, several stopes were evaluated and got better results.
磷酸盐对盐生杜氏藻生长和细胞色素积累的影响
Effects of Phosphate on the Growth and Cell Pigment Accumulation of Dunaliella salina
 [PDF]

刘笑, 培磊
Adances in Marine Sciences (AMS) , 2016, DOI: 10.12677/AMS.2016.33014
Abstract:
研究了不同浓度(0~0.30 mmol/L)的KH2PO4对盐生杜氏藻生长和细胞色素积累的影响,结果表明,添加0.10 mmol/L KH2PO4,细胞生长最快,最高密度为153 × 104 cell/mL,无磷对照组密度最低,仅为36 × 104 cell/mL;KH2PO4浓度为0.20 mmol/L时,β-胡萝卜素积累量最高,为12.8 mg/L,其次是0.15 mmol/L,对照组很低,仅为6.28 mg/L,KH2PO4超过0.25 mmol/L对β-胡萝卜素积累有抑制作用;适当添加KH2PO4对D. salina叶绿素a合成有促进作用;在培养的前6天,pH值明显上升,随后4~5天又下降;添加0.1 mmol/L KH2PO4细胞蛋白质含量最高,为37.34%,对照组仅为24.86%;0.10 mmol/L组的KH2PO4在6天内吸收完毕,KH2PO4吸收的时间与其最初的浓度呈正相关关系,建立了藻液中KH2PO4被盐生杜氏藻吸收的动力学方程。
The effects of KH
光滑Weyl和的分数幂次均值数值边界(英文)
,
河南大学学报(自然科学版) , 2012,
Abstract: 讨论了分数幂次光滑Weyl和的均值数值边界之间的关系,给出了幂次区间[4,5]中的数时相应均值数值边界的一些新结果.
腐朽虫蛀木构件的耐久性预测模型研究进展
Review of the Prediction Model for Durability of Structural Wood under Decay and Termite Attack
 [PDF]

小丽, 刘昊, 雪亮
Hans Journal of Civil Engineering (HJCE) , 2015, DOI: 10.12677/HJCE.2015.45026
Abstract: 对木结构进行剩余寿命预测需要从材料层面考虑木材的腐朽、虫蛀、干缩裂缝和持续荷载对木材长期抗力的影响。木构件腐朽深度的增大和木材强度的降低是腐朽引起木材长期抗力降低的主要原因,构件中的虫洞数量和虫洞深度减小了构件的有效横截面积是虫蛀对木材长期抗力降低的主要影响。因此,本文从木材腐朽和虫蛀的角度,分析总结了木构件耐久性预测模型研究进展,包括地面木构件腐蚀随时间变化的模型,与土壤接触的地面木构件的腐朽模型,地下木桩的腐蚀模型和虫蛀的可靠度模型等。并在此基础上,指出腐朽机理的研究,考虑各种环境因素建立更加合理的腐朽规律和虫蛀规律是有待解决的关键问题。
The mechanical properties of the structural wood are affected by its surrounding such as shrinkage cracks, decay fungi, termite attack and duration of load effect. It is necessary to study how these factors affect the resistance of the wood member during service life in order to predict the residual life of timber structure. Decay fungi induce the depth of decay increasing as time and the termite attack makes the wood have more pinholes. Both of them will greatly reduce the effective area of the wood member and meanwhile decay fungi decrease the strength properties in wood. In this paper the research development and achievement of the prediction model for durability of structural wood under decay and termite attack are reviewed in detail including decay model of in-ground timber, exposed timber in ground contact, above-ground exposed timber, protected timber and a reliability model under termite attack, and then it is concluded that it is the key problem and main future research to study on the mechanics of timber decay and to develop the quantitative prediction model under decay and termite attack considering various environmental factors.
Regression Analysis of IF Values of Chinese Sci-tech Journals Cited by SCI as Compared with Values of Citations by Chinese Databases CSCD and CSTPCD
SCI和CSCD、CSTPCD收录中国科技期刊的IF值的回归分析


中国科技期刊研究 , 2005,
Abstract: 针对传统提高论文时效性的办法不能很好解决学术论文时效性差这一问题,提出了依靠“中国科技论文在线”,中国学术期刊网或万方数字化期刊群等网络媒体,发表论文全文或详细中英文摘要,这是提高学术论文时效性的一种途径。
约束和最宜指数对经济权重的独立性1)

遗传 , 1989,
Abstract: 综合指数法是家畜多种经济性状改良中最常用的育种方法之一。一般情况下,不论在理论上还是实践上,综合指数的选择效率均比单项选择法和独立水平法要高。 纵观近20多年来世界各国学者对综合指数的理论研究和实际应用,普遍感到制订经济权重很棘手。究其原因,不外乎三个,一是某些经济性状对复合育种值(H)的贡献不呈简单的线性关系(在育种目标中,其遗传进展限制在一定水平的那些辅助性状,如产蛋鸡的开产体重对提高产蛋量并不表现为简单的线性关系,往往为抛物线关系);二是某些性状(如开产天数,蛋形指数等)没有具体的经济价格;三是各地的环境条件,市场价格,还有同一品种在各地的表
Scattering Characteristics and Targets Recognition of Laser TDD
激光目标探测装置的回波特性及目标识别技术研究

张辉,
光子学报 , 2005,
Abstract: Based on the 3D coordinates of target facet primitives and flying-time of laser pulse, a novel method is presented here to describe the scattering characteristics of Laser Target Detection Device. The scattering power equations of target and aerosol are derived theoretically, as well as the simulating pulses wave of receiving signal is given. According to the amplitude-width information of pulse, a recognition method of discriminating target and disturbing signals is shown.
液体变焦透镜简介

现代物理知识 , 2006,
Abstract: 关于电化毛细管作用的研究始于1875年,李普曼(G.Lippmann)在当时用相关理论来解释对浸在电解液中的水银滴表面施加电压时其形状发生变化这种现象。弗洛姆金(A.Froumkine)用同样的原理解释了电解液体表面的净电荷会改变其与金属表面张角的现象,也就是所谓的电湿润过程。最近,一个巧妙的实验更加形象地展示了这种过程,从而将其应用进行了推广,并使用水银液滴对传感器和光学开关进行了测试。人们在电极和电解质之间插入一种绝缘体的时候,发现电湿润过程起到了很大作用,它使电极和电解质之间的接触角度改变了50多度,并且人们更进一步确定了电…
中国植物生理学会成立

科学通报 , 1964,
Abstract: 中国植物生理学会于1963年10月16日在北京成立,并从10月16日至26日举行了代表大会暨第一屆年会。年会收到論文259篇,宣讀了78篇。这些論文大多数是近二年来的研究成果。論文总数比解放前发表的植物生理学論文总数多一倍,而与建国后
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