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太阳能-相变蓄热-新风供暖系统运行控制策略研究

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土木工程学报 2010年第S2期43卷 421-425页

作者：李志永陈超邓超北京工业大学北京100124

利用太阳能为建筑提供新风供暖负荷,难点之一是如何解决好太阳能变化不定、而建筑供暖需求连续稳定之间的矛盾。为此,根据所构建的太阳能-相变蓄热-新风供暖系统,以北京地区某办公建筑为具体案例,重点分析在北京冬季晴好天气条件下,针... 详细信息

利用太阳能为建筑提供新风供暖负荷,难点之一是如何解决好太阳能变化不定、而建筑供暖需求连续稳定之间的矛盾。为此,根据所构建的太阳能-相变蓄热-新风供暖系统,以北京地区某办公建筑为具体案例,重点分析在北京冬季晴好天气条件下,针对太阳辐射强度不断变化的特点,结合所研制的相变蓄热材料的蓄放热特性以及自动控制技术,确保房间供给新风温度相对稳定条件下的系统运行控制策略及其控制条件。研究结果表明,所提出的系统运行控制策略可以确保房间新风送风温度控制在27.5～28.5℃,该运行控制策略对于其他天气条件也是适应的。

关键词：全玻璃真空管集热器相变蓄热新风供暖运行策略

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A transmission electron microscopy study of submicrometer BiFeO3 particle prepared by an improved solid state reaction

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A transmission electron microscopy study of submicrometer Bi...

2011年全国压电和声波理论及器件应用研讨会

作者： Mei-ju SI Yu-dongHOU~* Hai-Yan GE Man-KangZHU Hui YAN Department of Materials Science and Engineering,beijing University of Technology,beijing 100124

In this work,submicrometer bismuth ferrite(BiFeO) particles have been prepared at the temperature 750℃by the improved solid state reaction,in which the quick sintering step is crucial in obtaining pure perovskite pha... 详细信息

关键词： Bismuth ferrite TEM Dielectric properties

An Optimizing Method based on Water-Filling for Case Attribute Weight

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An Optimizing Method based on Water-Filling for Case Attribu...

第24届中国控制与决策会议

作者： ZHAO Hui ,YAN Ai-jun, ZHANG Chun-xiao ,WANG Pu College of Electronic Information & Control Engineering, beijing University of Technology, beijing, 100124, China

Case retrieve is the key link in Case-Based Reasoning（CBR）system, and the distribution of attribute weights affects the retrieval accuracy directly. However, the traditional retrieval methods do not pay much attention to the weights distribution which led to low retrieval efficiency. In this paper, a new method based on Water-Filling principle in wireless communication field is proposed to optimize the case attribute weights. Regarding every single attribute in the case base as a sub channel, then calculates the importance of each case attribute by analyzing the data volatility with the Water-Filling principle. To prove the availability of the method, a glass identification dataset from the UCI database is used for a simulation experiment and the result illustrates that the new method could get a better and more accurate retrieval result compared with the traditional methods. The method could dig the inner information of each case attribute, and could assign proper weight to each attribute, which improves the retrieval accuracy and proves that the method the paper introduced is effective for CBR system.

关键词： Case-based reasoning case retrieve Water-Filling case attribute weights

An Algorithm Based on Time Series Similarity Measurement for Missing Data Filling

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An Algorithm Based on Time Series Similarity Measurement for...

第24届中国控制与决策会议

作者： LI Hui-min, WANG Pu, FANG Li-ying, LIU Jing-wei College of Electronic Information & Control Engineering, beijing University of Technology, beijing 100124

In data mining processing, filling incomplete data is very important in preprocessing of data mining project. An algorithm based on time series similarity measurement for incomplete data is proposed, this approach can fill missing data via following internal rule of data set reasonably. By experiments, we can draw a conclusion that algorithm is effective on condition that incomplete data are no more than half of the whole data in one case.

关键词： Incomplete data filling DTW distance Similarity measurement Time series

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基于分形维数权重的泥石流危险度评价

山地学报 2011年第6期29卷 747-752页

作者：王威田杰马东辉刘晓然北京工业大学抗震减灾研究所北京工业大学建筑工程学院

泥石流危险度评价是一个复杂的不确定系统问题,为了准确评价泥石流所处的危险度状态,进而为泥石流的防治提供科学依据,提出了基于分形维数权重的泥石流危险度评价方法。该方法首先选取影响泥石流危险度评价的10个主要因素,根据分类标准... 详细信息

泥石流危险度评价是一个复杂的不确定系统问题,为了准确评价泥石流所处的危险度状态,进而为泥石流的防治提供科学依据,提出了基于分形维数权重的泥石流危险度评价方法。该方法首先选取影响泥石流危险度评价的10个主要因素,根据分类标准,采用在每级标准中随机内插的方法,得到40个标准样本,用于构建泥石流危险度评价的分形—插值模型;其次根据最大似然分类原则确定每个泥石流指标的评价分维数;然后利用加权求和法计算样本的综合评价值,并根据样本综合评价值与经验等级之间的关系建立分形插值评价模型;最后,通过实例分析表明:该方法的评价结果是准确和可靠的,与采用其他分类方法所得结论一致。此外,该模型可以得出每个样本的具体得分值,即使对属于同一级的样本也可以排出它们的优劣顺序,因而具有较高的分类精度,为泥石流危险度评价提供了一种较好的新方法。

关键词：分形理论插值模型分维数泥石流危险度评价

Synthesis and study on activity of phosphorus-containing derivatives of quinolinone targeting at HIV-1 integrase

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Synthesis and study on activity of phosphorus-containing der...

中国化学会第28届学术年会

作者： Yan Song,Zhang Sulei,Hu Liming* College of Life Science and Bio-engineering,beijing University of Technology,Pingleyuan Street NO.100,Chaoyang District,beijing,100124,China

＜正＞Integrase（integrase,IN）,as an ideal target for the design of HIV drug[1-3],is a hot spot in the field of anti-HIV drug research. However,at present there’s only one, Raltegravir,which has been successfully listed as an integrase *** is exciting and auspicious that Gilead Sciences developed the first quinolinone acid-containing compound,Elvitegravir（GS-9137,JTK-303）,which has entered phase III[4].The quinolinone acid group of Elvitegravir has pharmacodynamic effects with HIV

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组合导航系统的自适应MCMC信息融合算法

系统仿真学报 2009年第16期21卷 5120-5123页

作者：周健裴福俊崔平远北京工业大学电子信息与控制工程学院北京100124

针对组合导航系统为高维非线性非高斯的特点,提出了一种在线实时调整粒子个数的自适应MCMC(Markov Chain Monte Carlo)粒子滤波算法。该算法利用基于KLD(Kullback-Leibler Distance)采样方法的自适应粒子个数调整算法在线调整MCMC粒子... 详细信息

针对组合导航系统为高维非线性非高斯的特点,提出了一种在线实时调整粒子个数的自适应MCMC(Markov Chain Monte Carlo)粒子滤波算法。该算法利用基于KLD(Kullback-Leibler Distance)采样方法的自适应粒子个数调整算法在线调整MCMC粒子滤波过程中的粒子个数,利用预测粒子在状态空间中的分布情况来在线实时的确定下一次滤波迭代所需的粒子个数,从而有效减小算法的运算量,提高MCMC粒子算法的实时处理能力。最后,将该算法应用到了组合导航系统中进行了仿真研究。通过仿真结果可以看出,该算法在保持了MCMC粒子滤波算法的估计能力的同时,有效降低了算法的计算量,更适合于实际应用。

关键词：组合导航 MCMC粒子滤波 KLD采样非线性非高斯

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Characterization and normalization factors of abiotic resource depletion for life cycle impact assessment in China

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中国科学:技术科学 2010年第4期 464-464页

作者： GAO Feng ,NIE ZuoRen,WANG ZhiHong,GONG XianZheng & ZUO TieYong College of Materials Science and Engineering,beijing University of Technology,beijing 100124,China

The availability of resources for economic activities differs between regions,and the importance of the resources is consequently observed to be different within regions compared to a global *** the current situation in Chinese mining industry and its statistic characteristics,the characterization procedures of abiotic resource in life cycle impact assessment(LCIA)have demonstrated certain limitations in the Chinese materials *** aim of this paper is to propose new characterization and normalization factors for abiotic resource depletion categories such as metals and non-renewable energy resources in a Chinese *** actual production of abiotic resources calculated by a modified model is compared to the reserve base in line with the new national standard to determine characterization factors in equivalence units,with antimony as the reference *** normalization factors are based on the total base reserves of the most important minerals in China.A case study on primary magnesium production using the Pidgeon process is used to compare LCIA results for abiotic resource categories that are between current LCIA factors and the new Chinese factors. These factors not only reflect the importance of abiotic resource with respect to region-specific resource depletion,but also can compare with the global factors.

关键词： resource depletion abiotic resource categories life cycle impact assessment (LCIA) magnesium production the Pidgeon process China

Compressive type accelerometer made of leadfree Bi0.5Na0.5TiO3-based piezoceramics

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Compressive type accelerometer made of leadfree Bi0.5Na0.5Ti...

2011年全国压电和声波理论及器件应用研讨会

作者： Kui-yong YANG Man-kang ZHU~* Yu-dongHOU Hui YAN, College of Materials Sci.& Eng..beijing University of Technology,beijing 100124

Compressive type accelerometers are widely used in various vibration ***-free piezoelectric ceramics as sensitive element have been preferred from the viewpoint of environmental *** this paper,0.30 wt%MnO-added BiNaKBaTiO(BNKB) piezoelectric ceramics were used as the sensitive element in a compressive type *** BNKB ceramics,prepared by a conventional mixed oxide method,presents

关键词： Accelerometer Lead-free piezoelectrics Sodium bismuth titanate Charge Sensitivity