BIM数据与现有运维系统的兼容与应用研究

作为一项价值被普遍认可的技术,BIM技术在在设计与施工阶段的应用日趋成熟,然而在运维管理方面还处于起步阶段,尤其是BIM产生的大数据与资产管理系统的兼容仍需进一步的研究与发展。本文基于中国南方航空大厦项目的BIM数据,探讨其与ARCHIBUS以及IBMS系统的兼容性以及应用,以BIM+FM技术路线为核心,研究了财务分析、租赁管理、资产管理、工位管理以及空间管理在实际项目中的实践。     

Nanoparticle–Cartilage Interaction: Pathology?Based Intra?articular Drug Delivery for Osteoarthritis Therapy

Osteoarthritis is the most prevalent chronic and debilitating joint disease, resulting in huge medical and socioeconomic burdens. Intra-articular administration...     

The Main Progress of Perovskite Solar Cells in 2020–2021

Perovskite solar cells (PSCs) emerging as a promising photovoltaic technology with high efficiency and low manufacturing cost have attracted the attention from ...     

U型辐射管的表面温度分布

本文分析了影响大型辐射管表面温度分布的因素,通过实验说明,对于单端吸入空气的扩散型燃烧辐射管,使用芯块可以明显地提高燃料的利用率,较好地控制空气消耗系数,强化气体与辐射管管壁之间的对流传热,从而改善辐射管的表面温度分布.     

F-containing cations improve the performance of perovskite solar cells

Organic–inorganic halide perovskite solar cells(PSCs)have delivered power conversion efficiency(PCE)on par with that of crystalline silicon solar cells,due to the considerable effort on the optimization of perovskite materials and devices[1].The three-dimensional(3D)perovskite-based PSCs with the standard n–i–p architecture gave a certified PCE of25.5%[2].However,the poor device stability under operating conditions remains an obstacle to commercialization.The 3D hybrid perovskite materials are susceptible to oxygen,UV light,humidity,heat,and electric fields[3].To improve device stability,two main strategies are applied:(1)improving the intrinsic stability[4];(2)providing sufficient protection.     

Detecting the One-Shot Dummy Attack on the Power Industrial Control Processes With an Unsupervised Data-Driven Approach

<正>Dear Editor,Dummy attack(DA), a deep stealthy but impactful data integrity attack on power industrial control processes, is recently recognized as hiding the corrupted measurements in normal measurements. In this letter, targeting a more practical case, we aim to detect the oneshot DA, with the purpose of revealing the DA once it is launched.Specifically, we first formulate an optimization problem to generate one-shot DAs. Then, an unsupervised data-driven approach based on a modified l...     

Rockfill material uncertainty inversion analysis of concrete-faced rockfill dams using stacking ensemble strategy and Jaya optimizer

Numerical simulation of concrete-faced rockfill dams (CFRDs) considering the spatial variability of rockfill has become a popular research topic in recent years. In order to determine uncertain rockfill properties efficiently and reliably, this study developed an uncertainty inversion analysis method for rockfill material parameters using the stacking ensemble strategy and Jaya optimizer. The comprehensive implementation process of the proposed model was described with an illustrative CFRD example. First, the surrogate model method using the stacking ensemble algorithm was used to conduct the Monte Carlo stochastic finite element calculations with reduced computational cost and improved accuracy. Afterwards, the Jaya algorithm was used to inversely calculate the combination of the coefficient of variation of rockfill material parameters. This optimizer obtained higher accuracy and more significant uncertainty reduction than traditional optimizers. Overall, the developed model effectively identified the random parameters of rockfill materials. This study provided scientific references for uncertainty analysis of CFRDs. In addition, the proposed method can be applied to other similar engineering structures.     

ADS-B技术在杭州空管自动化系统中的应用

提出一种广播式自动相关监视（ADS-B）天线配置分析模型,该模型可实现基于本地具体情况获得满足空管管制要求的ADS-B天线部署方案,为后续ADS-B站点部署实施时选择定向/全向天线提供决策工具。本文以报文正确解码率作为评估定向/全向天线效果的直接指标,从飞机数量、雷达/TCAS部署情况、飞机应答/广播速率等3个角度出发,获得空域单目标每秒发送报文的数量,分析其与定向/全向ADS-B接收设备报文解码率的关联性,从而得到定向天线与全向天线配置下报文解码率分析模型,然后设置模型相关参数,通过模型解算获得相应的正确解码率。通过实际录取数据对该模型正确性进行相关验证,结果与理论模型基本保持一致,证明ADS-B天线配置分析模型是正确有效的。

     

高炉冶炼硅锰合金试验

高炉法辅助电炉因地制宜地生产硅锰铁合金,可以充分利用我国贫锰矿资源,并有可能提供一个新的高炉铁合金品种。
在理论分析的基础上,在一座36m³的小高炉上进行了工业冶炼试验。试验表明:在高炉上用富氧鼓风冶炼含Si=12-14%的硅锰铁合金,在技术上是成功的,在我国条件下,经济上也是有益的。     

M-α-β三元系中α组元的扩散方程及两种特定条件下的解

根据扩散理论及组元间的交互作用,建立了M-α-β三元系中,β组元的分布变化时,α组元的扩散方程。并且给出了\