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231.
K.?LiEmail author S.?Thompson P.?A.?Wieringa J.?Peng G.?R.?Duan 《Cognition, Technology & Work》2003,5(2):107-126
Artificial neural networks and genetic algorithms are two intelligent approaches initially targeted to model human information
processing and natural evolutionary process, with the aim of using the models in problem solving. During the last decade these
two intelligent approaches have been widely applied to a variety of social, economic and engineering systems. In this paper,
they have been shown as modelling tools to support human supervisory control to reduce fossil fuel power plant emissions,
particularly NOx emissions. Human supervisory control of fossil fuel power generation plants has been studied, and the need of an advisory
system for operator support is emphasized. Plant modelling is an important block in such an advisory system and is the key
issue of this study. In particular, three artificial neural network models and a genetic algorithm-based grey-box model have
been built to model and predict the NOx emissions in a coal-fired power plant. In non-linear dynamic system modelling, training data is always limited and cannot
cover all system dynamics; therefore the generalization performance of the resultant model over unseen data is the focus of
this study. These models will then be used in the advisory system to support human operators on aspects such as task analysis,
condition monitoring and operation optimization, with the aim of improving thermal efficiency, reducing pollutant emissions
and ensuring that the power system runs safely. 相似文献
232.
介绍了欧盟摩托车和轻便摩托车排放耐久性要求的法规草案,详述运行循环、劣化系数计算和型式认证扩展等内容。在此基础上进一步分析对比了美国法规、欧盟法规草案与我国标准草案有关摩托车排放耐久性要求的异同。 相似文献
233.
234.
《能源学会志》2020,93(4):1390-1398
Real-time combustion and emission control is an ongoing challenge in combustion technology and science. Hence, the scope of the present paper is the investigation of the relationship between the chemiluminescent signal and the CO and NOX emissions. Flame emission spectrometry measurements were carried out to determine the characteristic free radicals of the spectra. For the experiments, a lean premixed liquid fuel burner equipped with an airblast atomizer was used in a test rig at 15 kW combustion power. The following measurement parameters were modified: combustion air flow rate, atomizing pressure, and the vertical alignment of the spectrometer. Furthermore, various half-cone angle quarls were mounted on the burner lip to extend the lean flame blowout stability limit. The CO and NOX emissions and the chemiluminescence intensity ratios of the strongest peaks of OH*, CH*, C2*, HCO*, and CH2O* were evaluated separately at first. Then a correlation analysis of the intensity ratios and the pollutant emission components was carried out. A notable linear correlation was found between both the HCO*/C2* and OH*/C2* intensity ratios and the CO emission in certain parameter combinations. 相似文献
235.
《International Journal of Hydrogen Energy》2023,48(62):23956-23966
Metal organic frameworks (MOFs) could greatly improve the power generation and degradation performance of microbial fuel cells (MFCs). MOFs and their compound derivatives played key role in cathode, anode and proton exchange membrane of MFCs, which greatly promoted the power generation of MFC and the degradation efficiency of various pollutants. However, MOFs were still possessed some defects, such as complex synthesis process, difficult regulation, instability, etc. Moreover, the application of MFC was limited in low power density, system internal resistance, microbial consumption, etc. Which further limited the degradation of pollutants by MFC. The existing problems and various improvement schemes of MOFs for MFCs were further summarized, which would provide references for promoting the application of MOFs materials in MFC system. It was expected to enhance the application of MOFs materials and promote the performance of MFC. 相似文献
236.
237.
《工程（英文）》2021,7(7):991-1001
Semiconductor photocatalysis is a potential pathway to solve the problems of global energy shortage and environmental pollution. Black phosphorus (BP) has been widely used in the field of photocatalysis owing to its features of high hole mobility, adjustable bandgap, and wide optical absorption range. Nevertheless, pristine BP still exhibits unsatisfactory photocatalytic activity due to the low separation efficiency of photoinduced charge carriers. In recent years, the construction of heterostructured photocatalysts based on BP has become a research hotspot in photocatalysis with the remarkable improvement of photoexcited charge-separation efficiency. Herein, progress on the design, synthesis, properties, and applications of BP and its corresponding heterostructured photocatalysts is summarized. Furthermore, the photocatalytic applications of BP-based heterostructured photocatalysts in water splitting, pollutant degradation, carbon dioxide reduction, nitrogen fixation, bacterial disinfection, and organic synthesis are reviewed. Opportunities and challenges for the exploration of advanced BP-based heterostructured photocatalysts are presented. This review will promote the development and applications of BP-based heterostructured photocatalysts in energy conversion and environmental remediation. 相似文献
238.
风力发电作为一种成熟的可再生能源技术,是实现能源可持续发展的重要举措。东北地区风力资源丰富,但由于自身的局限性,导致东北电网电源结构的组成缺少调峰电源,造成电网不得不大量弃风。通过电厂的不投油最低稳燃负荷性能试验,确定东北电网全网的最小出力为10 500 MW,在《东北电网火电厂最小运行方式(2010)》最小出力为12 710 MW的基础上,调峰容量增加了2 210 MW。以2010年东北电网因调峰弃风发电量约6亿kWh计算,可节约燃用标煤18.9万t,按东北地区燃煤单价850元/t计算,折合成人民币为1.6亿元。其中,减排CO250.3万t,烟尘30 537 t,SO2845 t,直排方式下减排氮氧化物507 t。节约了传统能源,减少了环境污染,为可再生能源的利用创造了条件。 相似文献
239.
In this work, the effect of capping agent type on the structural, optical and photocatalytic properties of pure zinc sulfide (ZnS) quantum dots (QDs) has been investigated. ZnS QDs were prepared by a simple, fast and water based chemical precipitation method, in the presence of various capping agents including 2-mercaptoethanol, thiourea, and l-cysteine. The obtained QDs have been characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), Fourier transform infrared (FT-IR), and UV–visible absorption spectroscopy. The results revealed that the optical absorption band of ZnS nanostructures varied by capping agents. In the photocatalytic investigations, the prepared ZnS QDs were applied for the photodecolorization of crystal violet (CV) as a model molecule. Influence of affecting parameters on the decolorization efficiency of the capped ZnS QDs was studied and optimized. The results indicated that the prepared QDs can effectively remove different concentrations of CV dye at alkaline pH, in the presence of low concentrations of QDs. According to the photocatalytic results, the presented method can be considered as a green, quick and efficient strategy for photobleaching of organic pollutants based on the high performance photocatalytic behavior of ZnS QDs capped by different capping agents. 相似文献
240.
《Energy Policy》2016
This paper applies a panel of 28 provinces of China from 1996 to 2012 to study the impacts of economic development, energy consumption, trade openness, and urbanization on the carbon dioxide, waste water, and waste solid emissions. By estimating a dynamic panel model with the system Generalized Method of Moments (GMM) estimator and an autoregressive distributed lag (ARDL) model with alternative panel estimators, respectively, we find that the Environmental Kuznets Curve (EKC) hypothesis is well supported for all three major pollutant emissions in China across different models and estimation methods. Our study also confirms positive effects of energy consumption on various pollutant emissions. In addition, we find some evidence that trade and urbanization may deteriorate environmental quality in the long run, albeit not in the short run. From policy perspective, our estimation results bode well for Chinese government's goal of capping greenhouse emissions by 2030 as outlined in the recent China-US climate accord, while containing energy consumption and harm effects from expanding trade and urbanization remains some environmental challenges that China faces. 相似文献