oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

2019 ( 32 )

2018 ( 862 )

2017 ( 862 )

2016 ( 856 )

Custom range...

Search Results: 1 - 10 of 30030 matches for " 潘楠 "
All listed articles are free for downloading (OA Articles)
Page 1 /30030
Display every page Item
基于蒙特卡洛模拟的电动汽车充电负荷预测
The Prediction of Electric Vehicles Charging Load Based on Monte Carlo Simulation
 [PDF]

, 乔文娟,
Modeling and Simulation (MOS) , 2014, DOI: 10.12677/MOS.2014.34012
Abstract:
本文主要对未来各类电动汽车大规模充电时所造成的电网负荷进行预测。基于现有中国电动汽车的发展趋势,根据用途不同,分为电动公交车、电动出租车、电动公务车、电动私家车;讨论不同类型电动汽车充电时对应的充电方式及充电时段,采用蒙特卡洛模拟法抽取起始荷电状态、起始充电时间;计算四种电动汽车的充电负荷,应用C++语言仿真模拟对应负荷特性曲线,并计算得到总体负荷曲线;通过分析曲线特征,总结未来电动汽车充电负荷主要影响因素,为电动汽车的充电设备建设提供指导型意见。
The charging load of a large number of electric vehicles is predicted in this paper. Based on the trends of electric vehicles in China, the electric vehicles are divided into electric buses, electric taxis, electric officer’s car and electric private car according to different use. The charging mode and time of different kinds of electric vehicles are discussed. The Monte Carlo simulation method is applied to determine the starting state of charge (SOC) and the initial charging point. The charging loads of four kinds of electric vehicles are calculated. The corresponding four charging curves and the total curves are obtained via simulation. Through analyzing the character of the curves, the influence factors of electric vehicles charging load in future are summarized and the suggestion for charging equipment building is provided.
MSLB事故对主控制室剂量影响研究
Study on the Influence of MSLB Accident on Main Control Room Dose
 [PDF]

孙大威, , 张姗姗
Nuclear Science and Technology (NST) , 2015, DOI: 10.12677/NST.2015.34018
Abstract: 本文深入的阐述了AP1000主蒸汽管道破裂事故(MSLB)剂量分析基本方法,介绍了一回路、二回路初始放射性释放及碘尖峰释放三种方式的源项计算模型。以AP1000滨海厂址为例,分别评估了MSLB事故后应急可居留系统(VES)模式和非放射性通风系统(VBS)新风过滤模式投入情况下主控制室(MCR)内工作人员的剂量,其剂量结果均可满足HAD 002/01-2010限值要求,事故后主控制室具有良好的可居留性。同时,针对VES投入情况下主控制室剂量影响参数,开展了详细的敏感性分析。研究结果表明,二回路初始存在的碘及碱金属对剂量贡献最大;MCR剂量主要来自于0.052~4 h时间段,由VBS正常通风引入的放射性所产生;破损SG喷放时间、VES模式开始时间、MCR内循环风量为剂量敏感参数,MCR内渗透率、辅助风机风量为剂量不敏感参数。相关研究结论可为优化主控制室设计提供必要的理论参考。
In this paper, main steam line break (MSLB) accident dose assessment method on AP1000 is ela-borated, and three types of radiation source term analysis models are expounded, involving the primary coolant initial activity release, secondary coolant initial activity release and iodine spike release. Based on the AP1000 coastal site, the main control room (MCR) personal doses are eva-luated, during operation of emergency habitability system (VES) mode and nuclear island nonra-dioactive ventilation system (VBS) supplemental air filtration mode, respectively. All the above results can meet the requirement of HAD 002/01-2010, and the main control room has good habi-tability. Meanwhile, detailed parameter sensitivity analysis is performed for MCR dose based on VES mode. Research results have shown that the initial secondary iodine and alkali metals release makes the largest contribution to MCR dose, and the MCR dose mainly results from the VBS normal operation mode activity introduction during the period of 0.052~4 h. The blowdown period of SG, beginning time of VES mode, and recirculation flow are the sensitive parameters to MCR dose, but the in-leakage rate and auxiliary fan flow are insensitive parameters. These research conclusions could provide necessary theory reference to MCR design optimization.

谷氨酸钠碳纳米颗粒的荧光光谱及量子产率测定
Measurement of Fluorescence Spectra and Quantum Yield of Carbon Nanoparticles Made from Monosodium Glutamate
 [PDF]

, 楚险峰, 立志, 毕森林, 丁莎, 周兴平
Journal of Advances in Physical Chemistry (JAPC) , 2016, DOI: 10.12677/JAPC.2016.53008
Abstract:
本论文主要以高温热解谷氨酸钠得到的荧光碳纳米颗粒(Glu-FCN)为研究对象,对其荧光光谱及其量子产率进行研究。结果显示:一方面,Glu-FCN存在pH依赖性,当pH在3.0到9.0之间时它的荧光强度最强,而其他范围荧光较弱;另一方面,此荧光碳纳米颗粒水溶液发光位置稳定,最佳激发波长为338 nm和发射波长为391 nm,荧光稳定性极佳。在中性环境下,Glu-FCN水溶液的荧光强度和浓度之间存在很好的线性关系,线性范围在0.2~50 μg/mL,检出下限为0.2 μg/mL。最后,以硫酸奎宁溶液为参比,测量了Glu-FCN在不同激发波长下的荧光量子产率,在最佳激发波长338 nm处的荧光量子产率高达51.5%,适合作为荧光标记物使用。
In this article, fluorescent carbon nanoparticles (Glu-FCN), made by monosodium glutamate pyro-lysis, have been researched, mainly including measurements of Glu-FCN fluorescent spectra and quantum yields. On one hand, pH dependence has been shown to be present in Glu-FCN according to our works. The fluorescence intensity is pretty low when surrounding pH is less than 3.0 or over 12.0. In contrast, it will become quite high when the pH is between 3.0 and 9.0. On the other hand, luminous position of Glu-FCN is very fixed. Optimal excitation and emission wavelengths are respectively located at 338 nm and 391 nm in a stable state. Importantly, good linear relationship exists between fluorescence intensity and concentration of Glu-FCN neutral aqueous solutions. The linear range is 0.20 - 50.0 μg/mL, with 0.20 μg/mL limitation. Eventually, quantum yields of Glu-FCN have been determined using quinine sulfate as a reference under different excitations. And Glu-FCN quantum yield is concluded to be as high as 51.5% under the optimal excitation (338 nm), implying its feasibility for being a fluorescent marker.
从用户体验的角度建立以病人为中心的设计
,祖平
包装工程 , 2013,
Abstract: 通过服务设计的手段,探寻缓解院方压力及提升以病人为中心的就医体验设计。利用并改善现有资源,加入设计的方法与手段,为患者提供便捷优质的服务,从而提高患者对就诊体验的满意度。
表观遗传学及现代表观遗传生物医药技术的发展
,学峰
生物技术通报 , 2015, DOI: 10.13560/j.cnki.biotech.bull.1985.2015.03.005
Abstract: 表观遗传学和基于表观遗传机制的生物医药技术的研究已经成为后基因组时代生命科学技术领域的重要组成部分。围绕肿瘤、心脑血管疾病、糖尿病及中老年神经退行性疾病等过程中DNA甲基化修饰、组蛋白翻译后修饰及非编码RNA等表观遗传学改变的深入研究,不仅有利于理解相关疾病的分子病理机制,而且,更有助于探寻基于表观遗传机制的有效治疗手段。在阐释表观遗传学修饰机制的基础上,对疾病过程中异常的表观遗传学修饰及相关生物医药技术的研究现状进行了归纳总结。
基于频域盲信号处理的汽车制动异响定位方法研究
,羿泽光?
河北科技大学学报 , 2014, DOI: 10.7535/hbkd.2014yx05002
Abstract: 汽车基础制动器在汽车刹车过程中会产生剧烈的振动和噪声,影响乘员的舒适性,降低有关汽车零部件的寿命;同时,尖锐的制动噪声(尖叫)还会严重干扰人们的正常生活。针对汽车制动异响噪声的治理工作非常重要。总结了汽车制动噪声的产生机理、噪声特点和影响因素,回顾并分析了抑制和防治制动噪声的理论与工程研究进展。针对传统汽车制动异响检测分析方法手段单一、数据处理不便、灵活性差等突出性问题,提出了一种基于声信号频域盲处理的制动异响定位方法,详细介绍了其关键技术:利用动态粒子群优化形态滤波抑制路试背景噪声、使用峭度最大化复数单元固定点算法分离提取复分量、利用改进kl距离解决次序不确定性等。通过实际刹车制动声信号故障提取,验证了该方法的有效性和可靠性。
基于双POD模型的空间相关三维随机风场数值模拟
,孙炳,陈勇
工程力学 , 2008,
Abstract: POD法提供了一种高效、准确的风荷载模拟方法,通过对风场的功率谱密度矩阵进行Schur分解,得到一系列的特征值和特征向量,选取主要的几阶特征模态进行计算就可以得到比较精确的结果。该文讨论了具有空间相关性三维随机风场的数学模型,利用双POD模型和蒙特卡罗模拟法,详细描述了空间相关三维风场的数值模拟方法。通过大跨越输电塔三维风场的数值模拟研究表明,模拟的顺风向、横风向、竖直向风速的功率谱密度函数与理论值较为符合,并且具有较好的随机性。证实了该文提出的方法是一种高效、准确的结构三维风场模拟方法,并可应用于大跨空间结构、高层建筑及大跨度桥梁等结构之中。
古尔班通古特沙漠地衣结皮对放牧踩踏干扰的小尺度响应
,张元明,惠霞
干旱区研究 , 2012,
Abstract: 古尔班通古特沙漠地衣结皮对放牧踩踏干扰及其所引起的生境异质性具有重要的指示作用。研究表明①放牧踩踏干扰主要集中于结皮层(0~5cm),随机调查的样方中,90%的样方干扰率均低于30%,生物土壤结皮(BSCs)破损尚处于较安全的范围;②放牧踩踏干扰降低了BSCs总盖度,不同类型的结皮对践踏干扰的反应具差异性,其中,真菌-藻类共生形成的地衣结皮与干扰率呈极显著负相关(P30%的样方中,抗风蚀能力较强的苔藓结皮、地衣结皮盖度均显著低于未受干扰样方,地衣共生体的破坏导致真菌数量显著增加(P30%的样方中各指标均低于未受干扰样方。其中,土壤容重是对放牧干扰比较敏感的指标,与地衣结皮盖度亦呈极显著正相关(P<0.01),与流沙盖度呈显著负相关(P<0.05)。
葡萄果实降异戊二烯类物质合成调控研究进展
,刘斌,秋红
园艺学报 , 2015, DOI: 10.16420/j.issn.0513-353x.2015-0195
Abstract: 降异戊二烯类物质是构成葡萄果实香气的重要组分,其极低的感官阈值和怡人的花果香味,对葡萄及葡萄酒香气品质具有重要的贡献。综述了葡萄果实中主要降异戊二烯类物质的种类、香气特点、生物合成途径及关键酶、生物合成的影响因素等方面的研究进展,并提出关键酶的调节及相关转录因子、栽培措施的影响等是今后主要的研究方向。
FHIT基因与子宫颈癌关系研究进展
郑威,陈少泽,泽民
中国公共卫生 , 2009, DOI: 10.11847/zgggws2009-25-02-65
Abstract: ?1996年,Ohta等[1]利用外显子捕捉法在人类染色体3p14.2处克隆了一条新基因,此基因编码的蛋白质属于组氨酸三聚体结构(histidinetriad,HIT)类蛋白质,该基因跨越人类染色体脆性部位FRA3B,故得名脆性组氨酸三联体基因(fragilehistidinetriadgene,FHIT).FHIT基因是近年来发现的抑癌基因,该基因跨越人类染色体脆性部位和家族性肾细胞癌相关的染色体交叉易位断裂点,是第一个将染色体脆性易位点与肿瘤相联系的分子生物学证据.已有研究发现,该基因与多种肿瘤如子宫颈癌、食管癌、胃癌、结肠癌、肺癌、前列腺癌等发生发展有关.
Page 1 /30030
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.