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Search Results: 1 - 10 of 35945 matches for " 付亚 "
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核电厂中主要弱β释放体的放射性量及控制方法研究
Main Low Energy β Emitter Radioactivity and Control Method Research in Nuclear Power Plant
 [PDF]

, 黎辉, 李怀斌
Nuclear Science and Technology (NST) , 2015, DOI: 10.12677/NST.2015.31002
Abstract:
随着核电厂中对正常满功率运行时裂变产物和腐蚀产物控制水平的不断提高,主要的弱β释放体(如氚和C-14)对公众的辐射影响变得日益重要。GB 6249-2011中对流出物中氚和C-14的单机组和厂址排放总量规定了控制值,也对内陆厂址排放口下游1 km处受纳水体中氚浓度进行了限制。本文根据核电厂中氚和C-14的主要产生途径,采用理论方法对其产生量进行分析,并从其产生途径和设计的角度,提出了切实可行的对释放到环境中的氚和C-14进行控制的方法和措施,以用于优化电厂设计,为环境影响评价和安全分析提供审评的依据。
As the control technology of fission and corrosion products develops during the full power operation in the nuclear power plant, the impact from the main β emitters (like tritium and Carbon-14) to people becomes increasingly important. Certain limits of the tritium and carbon-14 concentration in the effluences for both single unit and site are established in GB6249-2011, also, it includes the tritium concentration restriction in the 1 km downstream water from the discharge canal for inland sites. Based on the main generation pathway, a theoretical method is applied to analyze the tritium and carbon-14 generations in this paper, and some tritium and carbon-14 release control recommended measures are provided from both the generating pathway and design aspects. Also, these measures could be used for the NPP design optimization, safety analysis and environment assessment.
The network mine safety monitoring system based on ARM and data fusion technology
基于ARM和数据融合技术的网络化矿井安全监测系统

,
计算机系统应用 , 2007,
Abstract: 随着国家对煤炭安全生产的日益重视,在该领域非常需要一种低成本低功耗高性能的基于网络化的井下瓦斯安全系统.这里介绍了一种基于三星公司32位ARM处理器的用于煤矿环境监测的解决方案,提出了硬件实现方案和相关的软件实现方法,系统中采用神经网络技术来对多传感器状态进行判别,提高采集数据的可靠性,同时采用两层多传感器数据融合技术来处理数据,通过ARM良好的网络集成性能实现监测分析的网络化,使系统具有良好的性价比.
人口资源环境经济学青年论坛综述
,飞 ?
期刊检索-中国人口科学 , 2015,
Abstract:
鸭胆汁中鹅去氧胆酸提取方法的建立
杨清林,
重庆师范大学学报(自然科学版) , 2015, DOI: 10.11721/cqnuj20150525
Abstract: 以鸭胆膏为原料,以高效液相色谱法和薄层层析法测定鹅去氧胆酸(CDCA)含量,研究氯化钡沉淀法提取CDCA以及理化影响因素,建立了制备高纯度CDCA的工艺方法。以500mL鸭胆汁水解过后制得19.4g总胆酸,其中含有8.13gCDCA,而且在水解过程中部分牛磺鹅去氧胆酸(TCDCA)转化生成了CDCA。上述方法简单有效,成本低廉,为临床分离鹅去氧胆酸提供了新的工艺方案。关键词
锅炉总燃料跳闸的预防性维修策略
,白焰
热力发电 , 2015,
Abstract: 火电厂锅炉总燃料跳闸(mft)是实现锅炉保护功能的安全仪表系统,为了确保安全功能的正常运行,对其进行了预防性维修策略的研究。结合火电厂实际运行工况,以mft的炉膛压力保护系统为研究对象,建立了马尔科夫模型;应用可靠性和安全性理论,以可用率和可靠性最高、维修费用最低为目标,实施多目标优化策略;在规程规定时间范围内,优化预防性维修间隔。
司家营铁矿选矿厂主厂房基础强夯置换试验
振国, 董仲飞,
金属矿山 , 2007,
Abstract: 强夯置换法是地基基础处理的有效手段之一,但目前还没有一套成熟的设计计算方法进行强夯设计,因此采用现场试验确定强夯置换参数成为该工艺参数选取的主要手段。为此,针对司家营铁矿选矿厂主厂房地基开展了强夯试验,确定了击实次数与加密区厚度、密度等关系曲线,以试验参数为基础,进行了该基础的强夯设计与施工。
基于支持向量机的蛋白质命名实体识别的研究
Research of Protein Named Entity Recognition Based on SVMs
 [PDF]

龚乐君, , 孙啸, 谢建明, 于双鑫
Hans Journal of Computational Biology (HJCB) , 2011, DOI: 10.12677/hjcb.2011.12002
Abstract: 发展一种利用支持向量机识别蛋白质命名实体的方法,选择四组特征对蛋白质语料进行识别实验。实验表明,与基线系统相比,上下文特征有较小的增幅,而当前词的词性及词形的组合特征获得了最好的性能,达到78.43%的准确率。这一研究结果显示词性及词形特征在蛋白质实体识别中起着重要的作用。
This paper describes an approach to identify protein named entity using Supports Vector Machines (SVMs), and selects four groups of features to do experiments for the protein corpus. Experiment results show the system performance of context features increases smaller than baseline system, and the combined feature of part of speech (POS) and word type is achieved 78.43% accuracy which is the best performance in all ex- periments. The research results show the combined feature of POS and word type play important roles in the protein entity recognition.
STUDY ON PRE-THERMODENATURE PEAK OF PROTEINS OF LOW WATER CONTENT BY DIFFERENTIAL SCANNING CALORIMETER
用差示扫描量热计对低水含量蛋白质热变性前峰的研究

,章正廉
生物物理学报 , 1985,
Abstract: This paper reports the observations of the DSC heating scanning curves of seven different kinds of hydrated proteins with high purity from eleven sources. The observation has shown that there is an obvious low temperature endothermal peak for all of the orotein samples used. It was named as a <> (PD peak).The heating scanning curves of lysozyme with various water contents were measured. Both denaturation peak and PD peak are strongly dependent on the water content. The peak-temperature of PD peak,Tpd, decreases with the.increase in degree of hydration and there is a break at about R = 0.1 g water/g protein. Tpd drops down to 315 K when R = 0.45. The enthalpy change of PD peak, Hpd, increases firstly with the increase in hydration degree and reaches the maximum 8.0 Kcal/mole at R=0.19. Then Hpd decreases with further increase in water content. The PD peak disappears at R = 0.45.The reappearance phenomenon of the PD peak was observed when the scanned samples are kept at room temperature for a certain period of time. The reappearance dynamics was followed. Both Tpd and Hpd of reappenred peak depend on the hydration degree of sample, the length of the time of keeping the scanned sample at room temperature and the temperature at which first scan was ended.The PD peak was checked on some polymers, amino acids, polypeptids and denatured proteins. It is interesting to be found that the protein after thermal denaturation displays again a PD peak but no denaturation peak. Apparently, the PD peak and denaturation peak have different origin.The possible mechanism of PD peak is discussed.
燃煤电厂排烟粉尘浓度在线监测方法
On-Line Monitoring Method of Exhaust Dust Concentration in Coal-Fired Power Plants
 [PDF]

蒋宝平, 忠广, 齐敏芳, 李璐,
Advances in Energy and Power Engineering (AEPE) , 2014, DOI: 10.12677/AEPE.2014.26010
Abstract:
燃煤电厂烟气污染物排放到大气中,这不仅关系到环境问题,而且直接危害人们身体的健康。因此粉尘浓度的测量越来越重要。本文采用支持向量机软测量技术,利用支持向量机的非线性映射和强大的泛化能力,建立排烟粉尘浓度的软测量模型,实现粉尘浓度的最佳估计。仿真结果表明该方法可以对粉尘浓度进行有效估计,可以作为粉尘浓度的在线监测方法。
Coal-fired power plant flue gases are discharged into the atmosphere without treatment, which not only aggravates environmental issues, but also directly endangers people’s physical health. So the measurement of dust concentration becomes more and more important. In this paper, strong nonlinearity mapping and generalization ability of support vector machine soft-sensing technique is used to establish soft-sensing model and to reach best estimate of dust concentration. Simulation results show that this method can estimate the dust concentration effectively and it can be applied to online monitoring of dust concentration.
喜庆元素在本土化设计中的运用
永亮,
包装工程 , 2013,
Abstract: 分析了喜庆元素在不同喜庆节日中的符号、色彩的差异性,以及喜庆元素符号本身所具有的有形与无形的特点,结合设计案例,论述了喜庆元素中的色彩以及有形元素与无形元素在本土化设计中的体现,进而分析了喜庆元素本土化设计的可行性。提出了喜庆元素的本土化设计必须根植于传统喜庆文化,以及运用现代的设计理念,达到喜庆元素与本土化设计的完美融合,使设计作品具有鲜明的时代性和地域性。
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