Detection of singularities in the pressure fluctuations of circulating fluidized beds based on wavelet modulus maximum method

Pressure fluctuations are often selected to analyze the dynamic changes in the gas-solid fluidized bed. In this study, the wavelet modulus maximum method is applied to analyze the pressure fluctuations in a circulating fluidized bed. Continuous wavelet transform is put on the pressure signals, then, maxima lines are extracted and the Lipschitz exponent, α, of every maximum line is calculated using the non-linear least-squares method. The mean of the negative α is adopted to describe the hydrodynamic characteristics in the circulating fluidized bed. The value of the mean of the negative α increases with the superficial gas velocity and turns stable when the flow regime is fast fluidization. This method has been tested effective under various operation conditions.     

A transient method for characterizing flow regimes in a circulating fluid bed

In recent years, although an increasing number of literature have been devoted to circulating fluidized bed (CFB), the prediction of velocities over which different fluidization regimes exist is still difficult. In this study, a transient method was applied which readily allows one to identify operational features and critical transitions. The method is based on stopping the solids flow rate into the riser when riser is operating in fully dense transport regime. The analysis of transient pressure drop data across the riser during a solids flow cut-off experiment against its time derivative demonstrate the three distinct operating regimes that exist as the gas deplete the solid out of the riser. The transient was compared to data taken under steady state operations using statistically designed experiments. Results indicated that although there were significant differences when comparing operations in dilute conditions, there were no significant differences between the two methods in the fast fluidized and dense transport regimes. The transient method was capable of reproducing the solids circulation dependence on riser solids holdup and on the axial pressure profile. This transient method offers an accurate, easy, rapid, and reproducible means of characterizing CFB operations over a wide range of flow conditions. The lack of accuracy in the dilute regime is conjectured to be due to the wide particle size distribution that resulted in segregation during the transient testing.     

石油钻井往复泵的系统仿真技术

本文将系统仿真技术应用于以往复泵为核心的整个钻井液力循环做功系统。以该系统为例，讨论了复杂工程的建模方法与混合模型系统仿真器开发方法。系统模型的仿真实验结果与实体系统实验结果吻合，证明了方法和结果的正确性     

循环流化床燃烧技术的应用

本文简略概述了循环流化床燃烧技术,介绍了湘潭锅炉厂在锅炉设计及对旧锅炉进行改造方面应用循环流化床燃烧技术的成果。     

具有防冷凝加热系统空—空冷却高压电机的研制

阐述了空—空冷却高压电机的电磁设计特点及通风冷却系统、防冷凝加热系统     

大容量高参数水泵在火电机组中的应用及节能潜力评述

简述了大型火电机组的发展状况,详细介绍了给水泵、凝结水泵、循环水泵在大型火电厂中的应用特点及经济指标.通过对已投运水泵存在的问题及对电厂经济性影响的分析,确认了这3种水泵在设计、制造加工、运行方式方面还存在较大的节能潜力,对提高火电厂的经济性、降低发电成本起到至关重要作用.     

基于循环流化床锅炉特性的115MW发电机组协调控制策略

通过对循环流化床（CFB）锅炉特性的研究,对机炉协调控制策略进行优化,成功地解决了CFB锅炉由于在负荷变动中存在惯性大、参数时变性、强耦合、强非线性和更难控制等特点所带来的问题。     

Proteomics of plaques and novel sources of potential biomarkers for atherosclerosis

Cardiovascular disease (CVD) is the leading cause of death and loss of productive life years in the world. The underlying syndrome of CVD, atherosclerosis, is a complex disease process, which involves lipid metabolism, inflammation, innate and adaptive immunity, and many other pathophysiological aspects. Furthermore, CVD is influenced by genetic as well as environmental factors. Early detection of CVD and identification of patients at risk are crucial to reduce the burden of disease and to allow personalized treatment. As established risk factors fail to accurately predict which part of the population is likely to suffer from the disease, novel biomarkers are urgently needed. Proteomics can play a significant role in identifying these biomarkers. In this review, we describe the progress made in proteome profiling of the atherosclerotic plaque and several novel sources of potential biomarkers, including circulating cells and plasma extracellular vesicles. The importance of longitudinal biobanking in biomarker discovery is highlighted and exemplified by several plaque proteins identified in the biobank study Athero-Express. Finally, we discuss the PTMs of proteins that are involved in atherosclerosis, which may become one of the foci in the ongoing quest for biomarkers through proteomics of plaque and other matrices relevant to the progression of atherosclerosis.     

不停车清洗预膜在2号高炉净循环水系统的应用

循环冷却水系统长期运行过程中，由于多种因素影响，管道、阀门、水泵等设备产生结垢和腐蚀，为使水系统保持长期正常运行，减缓腐蚀结垢速度，需投加杀菌剂和阻垢缓蚀剂，2a进行一次清洗和预膜。主要介绍了2号高炉净循环水系统不停车清洗预膜的步骤、效果，并推荐在工况相似循环水系统中参考应用。     

燃煤循环流化床锅炉计算机测控系统的设计

系统采用研华工控的ADAM-4000系列远端数据采集与控制模块及工业控制计算机开发了35t/h循环流化床锅炉计算机测控系统和远程监控网络．应用KingView6．0组态软件．实现对循环流化床锅炉的智能控制．大大提高了控制系统的自动化水平。实践表明，该系统实时性好。控制稳定．操作方便.