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Search Results: 1 - 10 of 133283 matches for " 杨欣 "
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基于周期图的频谱检测改进算法
Improved Spectrum Detecting Algorithm Based on Periodogram
 [PDF]

龚锐, ,
Hans Journal of Wireless Communications (HJWC) , 2013, DOI: 10.12677/HJWC.2013.35016
Abstract: 传统的周期图检测法是一种近似无偏的估计方法,但存在估计偏差和估计方差相互制约的问题。针对此问题,本文采用多窗谱估计,该方法是基于滤波器组理论改进的周期图检测法,利用多个正交窗进行谱估计,有极佳的能量集中性,能解决谱估计存在较大方差的问题。理论推导及仿真结果证明,基于多窗谱的频谱检测算法是一种低方差、高分辨率的频谱检测方法,能有效实现低信噪比条件下的信号检测,且相比于其他检测算法能达到更好的检测性能。
 The traditional periodogram spectral estimation method is an approximately unbiased spectral estimation method, however, with the difficulties of estimated bias and estimated variance dilemmatic. To solve this problem, a kind of accurate non-parametric multitaper method was introduced in this paper which is actually regarded as the improved periodogram spectral estimation method based on filter banks. The multitaper method makes use of multiple orthogonal windows for spectral estimation. By this means, the spectrum is estimated with excellent energy concentration. It can solve the problem of spectral estimation variance. The theoretical derivations and simulations show that the multitaper spectral spectrum detecting algorithm is a low variance and high resolution spectrum detection method, especially for the weak signal detection under strong noise background. It has effective performance and outperforms other spectrum detecting methods in low SNR.
控制混合处理水质监测废液的效能及机理

化工进展 , 2015, DOI: 10.16085/j.issn.1000-6613.2015.11.042
Abstract: 监测COD、NH3-N产生的废液量大、剧毒,因此对于控制混合工艺采用以废治废的思路。本文针对原液特性及工艺需求选择控制点,监测COD废液(总银478mg/L,总铬207.5mg/L,总汞411.6mg/L)与NH3-N废液(总汞464.7mg/L)在控制点(废液体积比1.16、1.2)进行反应,固液分离后,滤液中汞含量降至10.07mg/L、10.12mg/L,汞去除率为97.7%;银含量降至0.07mg/L,银去除率99.97%,大大减轻后续处理负担。汞和银被富集于污泥,废液体积比为0.3~1.25,固液分离后溶液Ag含量低于0.5mg/L;去除汞的较佳范围为废液体积比1.11~1.25倍,汞去除率达到96%以上。控制混合法处理1L监测COD废液,同时还可减少约0.86L的监测NH3-N废液,使废液本身含有的I-、Cl-等成为沉淀剂。相比常规工艺,该方法加药量大幅减少,运行费用低,重金属盐纯度较高,污泥量少。
朱培庭教授治疗胆石病经验撷要
,
中国中医药信息杂志 , 2001,
Abstract:
“环境正义”视域下的环境法基本原则解读
Analyses on the principles of new environmental law from environmental justice perspective


- , 2015, DOI: 10.11835/j.issn.1008-5831.2015.06.019
Abstract: 2015年正式施行的新《环境保护法》作为环境保护领域的基本法首次明确了环境法基本原则,体现了形式法治的要求,释放出环境法要以基本原则规范为中心来构建和发展基本原则解释体系的信号。环境正义理论体现实质法治的要求,虽源起美国,但中国也面临环境保护与经济发展交织的环境正义问题。新法确立的“保护优先”、“预防为主,综合治理”、“公众参与”、“损害担责”四项原则的内涵与环境正义理论存在着深度契合。以“环境正义”为视域思考环境法基本原则,在丰富、深化环境法基本原则解释的同时,也为环境正义法律化提供路径思考,促成环境形式法治与实质法治的统一。
The new environmental law implemented from 2015 defined the basic principles for the first time. These principles are the embodiment of formalized rule of law and this amendment releases the signal that environmental law should build and develop the interpretation system centers at the basic principles. The environmental justice issues originated from America also consists in China because of requirements for economic development and environmental protection. The new law established “conservation priority” principle, “prevention and comprehensive management” principle, “public participation” principle, “saboteur responsibility” correspond to the environmental justice theory profoundly. Analyzing the principles of new environmental law from environmental justice perspective is a way to enrich the interpretation of principles and provide a path for the legalization of environmental law and unification of formal and substantial rule of law.
患疟疾小鼠红细胞内脱氧核糖核酸结合蛋白

科学通报 , 1986,
Abstract: 已知血清、脑脊液、癌性腹水等休液中存在着脱氧核糖核酸结合蛋白(简称为DBP)。本实验用DNA-纤维素亲和层析法分离DBP,并用十二烷基硫酸钠-聚丙烯酰胺凝胶电泳(SDS-PAGE)分析之,发现小鼠红细胞内也存在着DBP,而且正常小鼠和患疟疾小鼠的红细胞DBP成分有一定差异。收集40~50只Swiss种小白鼠抗凝全血,用生理盐水洗涤红细胞去除血浆蛋白质,并以30倍体积的蒸馏水溶破红细胞,10,000rpm离心10min除去细胞有形成分后,将红细胞溶胞产物过DNA-纤维素亲和层析柱。先用磷酸盐缓冲液洗去非DBP部分(主要是血红蛋白),再用含0.5M/NaCl的磷酸盐缓冲液将DBP洗脱。收集洗脱部分,用蒸馏水将其彻底透
巫家拳的缘起、流派及拳理拳路初探

湖南工业大学学报(社会科学版) , 2011,
Abstract: 巫家拳由清嘉庆时期巫必达创立,盛传于湖南,现已传承八代,分李氏、冯氏、唐氏三大流派。其拳劲力内含,动作松柔,拳路多以“六肘”命名。
线粒体细胞色素b基因在鱼类系统发育研究中的应用
,太有
生物技术通报 , 2010,
Abstract: 阐述了线粒体Cytb基因在鱼类系统发育研究中的应用进展和方法步骤,分析了Cytb基因在研究中面临的问题并综合了相应的解决办法。
低功率激光无线能量传输的初步研究
Preliminary Research on Low-Power Laser Wireless Energy Transmission
 [PDF]

, 刘长军, 吴昕,
Modern Physics (MP) , 2013, DOI: 10.12677/MP.2013.31009
Abstract: 本文构建了一种分布式激光输能系统,该系统采用半导体激光器发射激光,经透镜调节后,照射到远处的太阳能电池上转换为直流电能。利用该系统,实验研究了在发射端与接收端距离10 m的情况下,三种波长的激光单独输能及相同和不同波长激光混合输能时的系统的光电能量转换效率,并对150 m输能距离的激光输能进行了初步实验探索。同时本文研究分析了该系统的设计和激光在传输过程中的功率损耗等问题。
In the paper, a kind of distributed laser-powered system is constructed. The system can transmit power with laser beam directed to the photovoltaic cells by the beam-steering lens from the semiconductor laser. At the distance of 10 m between the emitter and receiver, the light-electricity transmission efficiency is studied by experiments with this system in the different situations, using single wavelength or different wavelength laser of three kinds to transmit power, and a preliminary exploration is implemented for the wireless energy transmission at the distance of 150 m. At the same time, the design of the system and the energy consumption are analyzed.
木质素炭化物及其应用研究
Study on Lignin Carbonization with Its Application
 [PDF]

胡佳萍,, 史瑞
Hans Journal of Chemical Engineering and Technology (HJCET) , 2015, DOI: 10.12677/HJCET.2015.53009
Abstract:
木质素是制浆造纸工业的副产物,是地球上最丰富的可再生资源之一。木质素的高值化利用已倍受研究学者的关注。本文全面归纳了木质素炭化及其在活性炭、碳纤维、炭黑等领域的研究现状,并对今后木质素炭化材料的开发提出了展望,旨在使国内的研究者对当前木质素炭化材料的研究有一个概括性的了解,为科学、高效地利用木质素提供参考。
The lignin is a kind of by-product from pulp and paper industry, also one of the abundant renewable resources on Earth. Efficient utilization of lignin has caused intense interest in the scientific community. This paper generalizes the lignin carbonization process and its research in the acti-vated carbon, carbon fiber, carbon black and other fields systematically, expecting to provide an overview of current research in lignin carbonized materials and give a reference to scientific and efficient utilization of lignin.
农田生态补偿方式的选择及市场运作——基于武汉市383户农户问卷的实证研究
,,蔡银莺
长江流域资源与环境 , 2012,
Abstract: 选择交易成本低、具有操作性的补偿方式,实现农田生态产品的市场运作,是农田生态补偿制度实施的关键。利用问卷调查资料,分析了武汉市农户对不同农田生态补偿方式的认知、选择以及其影响因素,在此基础上指出了政府补偿方式在农田生态补偿领域的缺陷及引进市场方式的建议。研究表明(1)武汉市农户对农田生态补偿的认知程度较低,仅有1071%的受访农户听说过生态补偿、生态危机等概念;(2)4902%农户对现行的现金补偿方式不太满意,认为补偿金额太低,9465%的受访者更倾向于接受更高额度的现金补偿方式;(3)农户对现金、实物、技术(智力)、政策等农田生态补偿方式的选择偏好受其性别、年龄、家庭人口、家庭年收入、家庭中需抚养人口数和文化程度的显著影响。研究提出构建农田生态补偿的交易平台、完善生态环境物品数量化的体系设计和管理模式的多样化是推进农田生态补偿的市场化运作的关键
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