基于土地流转的草尾镇城乡统筹发展规划设计研究

土地流转是城镇化建设的需要,也是现代农业的基础和前提,通过土地流转的桥梁作用,可以加快统筹城乡一体化发展,最终促进农村社会经济统筹发展,缩小农村与城市的差距。本文对沅江市草尾镇土地流转现状及措施进行分析,基于土地流转的城乡空间统筹布局进行研究,探讨城乡统筹发展实施成效,为研究城乡统筹发展规划抛砖引玉。     

跨行政区游憩空间柔性一体化研究——以高莱茵河沿岸地区为例

随着城市化与区域一体化的迅速发展,不同行政区之间的联动关系越来越紧密,这种联动关系在城市各功能空间的设计上有所体现,更渗透到了与市民息息相关的游憩空间建构之中.受制于行政管理等方面的原因,在跨行政区的游憩空间一体化实施过程中,往往会采取一系列柔性措施.以欧洲高莱茵河沿岸地区为研究对象,分析高莱茵河沿岸地区游憩空间的发展...     

Particulate matter emitted from ultrasonic humidifiers—Chemical composition and implication to indoor air

Household humidification is widely practiced to combat dry indoor air. While the benefits of household humidification are widely perceived, its implications to the indoor air have not been critically appraised. In particular, ultrasonic humidifiers are known to generate fine particulate matter (PM). In this study, we first conducted laboratory experiments to investigate the size, quantity, and chemical composition of PM generated by an ultrasonic humidifier. The mass of PM generated showed a correlation with the total alkalinity of charge water, suggesting that CaCO₃ is likely making a major contribution to PM. Ion chromatography analysis revealed a large amount of SO₄²⁻ in PM, representing a previously unrecognized indoor source. Preliminary results of organic compounds being present in humidifier PM are also presented. A whole-house experiment was further conducted at an actual residential house, with five low-cost sensors (AirBeam) monitoring PM in real time. Operation of a single ultrasonic humidifier resulted in PM_2.5 concentrations up to hundreds of μg m⁻³, and its influence extended across the entire household. The transport and loss of PM_2.5 depended on the rate of air circulation and ventilation. This study emphasizes the need to further investigate the impact of humidifier operation, both on human health and on the indoor atmospheric chemistry, for example, partitioning of acidic and basic compounds.     

Black-box models for fault detection and performance monitoring of buildings

Black-box models such as linear regression have proven to be helpful in ongoing building commissioning in many ways. The aim of this work is to improve linear models with change point for fault detection in buildings. Building simulations revealed poor performance of them (R 2 2. Remark: In the Inverse Modelling Toolkit (IMT) (Kissock et al. 2003) similar models are called CP-MVR or rather 3P-MVR or 4P-MVR. The difference to the CPMLRs used here is that there are different intercept terms for all linear regressions for the CPMLRs instead of one equal intercept term for all linear regression models 3P-MVR. This is introducing discontinuities on continuous independent variables but for the mean daily perspective taken here this is not disadvantageous.  < 0.7) for some low energy buildings. The regression models (RMs) can be considerably improved by introducing the rate of change of the indoor air temperature (ΔT _ind) as an independent variable. Thus, R ² values were raised by up to 0.5 (e.g. from 0.2 to 0.7, example with the lowest R ²). A new training and application process for the RMs revealed further improvements by using a hierarchical agglomerative clustering algorithm to determine different day-types as additional (categorical) variables in the RM. The application of these improved RMs for outlier detection is demonstrated in three buildings.     

建筑水循环设计

对排水与生态、水资源利用与污水处理这三方面进行了分析,提出了保水、节水、净水的绿色建筑的水循环设计方法,以实现居住环境的永续水资源利用,从而使得人、建筑和自然环境共同协调发展。     

“新一题多解模式”在城市规划设计类课程教学中的运用

当前针对城市规划设计课程教学主要采用的“一题多解模式”在城市规划学科发展及社会对城市规划学科人才需求的变化过程中,出现了命题方式、成果要求及评判标准等方面的滞后等问题,应形成以各个年级不同教学要求为标准,有助于学生多元化、多角度认知城市,科学合理地挖掘城市问题,培养学生创新意识的“新一题多解模式”。     

多重互相关函数在剪切波速测量中的应用

论文介绍了一种提高剪切波速测量精度的新方法——多重互相关函数法。考虑到判断场地剪切波到时差的困难,提出了用多重互相关函数来求得两剪切波的到时差。对噪声比较大的信号需要进行多重自相关分析才能达到较高的信噪比;互相关分析可求取两相似信号的到时差,但当两信号噪声比较大时,所求得的到时差误差较大;自相关函数本身可进行多重自相关分析,互相关函数结合多重自相关函数后,也可以进行多重互相关分析。实验表明：多重互相关函数能提高触发信号和井中三分向探头输出信号的信噪比和精确地识别出它们的到时差。基于此原理设计了剪切波波速的测试系统,此系统能自动分析出测点的剪切波速和形成完整的报告。     

XPS,SSIMS, TGA,FTIR, AND SEM STUDIES OF CATALYTIC PYROLYSIS OF METHANE OVER Ni:Cu/Al- AND Ni:Cu:K/Al-MODIFIED SUPPORTED NANO-CATALYSTS

The surface interaction of Ni:Cu/Al- and Ni:Cu:K/Al-modified catalyst has been studied using X-ray photo electron studies (XPS), static secondary ion mass spectrometry (SSIMS), thermal gravimetric analysis (TGA), Fourier transform infrared (FTIR), scanning electron microscopy (SEM), and temperature programmed desorption (TPD). These techniques revealed that during catalytic studies of methane conversion to carbon nano tubes and hydrogen, the active metals are converted into different ionic and non ionic states coupled with formation of bimetallic/trimetallic oxides. The addition of potassium modified the metal active sites through ensemble effect by donating electrons to the catalytic multiple active sites. These species are responsible for the control of surface morphology and product selectivity during the catalytic reactions.     

多相材料的连续体结构拓扑优化设计

采用改进的过滤技术进行多相材料的连续体结构拓扑优化设计。以应变能最小化作为目标函数,结构体积作为约束,建立多相材料的连续体结构拓扑优化模型,将移动近似算法用于拓扑优化问题求解,采用改进的过滤求解技术对目标函数灵敏度及单元设计变量进行过滤,避免迭代过程中出现数值不稳定现象。数值算例结果表明,采用改进的过滤技术的多相材料连续体结构拓扑优化设计方法是有效的,能够获得清晰的结构拓扑图。     

氢气压缩机机封冷却水循环利用改造

针对18万t/a离子膜烧碱装置中氢气处理系统的氢气压缩机机封水压力不稳定等问题,对工艺进行了改造,改造后的生产工艺安全、稳定,每年可节约电费14.26万元,节约水费3.8万元。