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Validation of Autonomous Microbe Sensor Prototype for Monitoring of Microorganisms in Injection Seawater Systems

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Journal of Sensor Technology 2016年第4期6卷 81-100页

作者： Mohammed A. Al-Moniee Xiangyang Zhu Lone Tang Fuad I. Nuwaiser Niels V. Voigt Peter F. Sanders Fahad N. Al-Abeedi Hanaa H. Al-Habboubi Saudi Arabian Oil company (Saudi Aramco) Dhahran KSA Danish Technological Institute (DTI) Aarhus Denmark

Microbial growth in the water injection system is a well-known problem with severe operational and financial consequences for the petroleum industry, including microbiologically influenced corrosion (MIC), reduced injectivity, reservoir plugging, production downtime, and extensive repair costs. Monitoring of system microbiology is required in any mitigation strategy, enabling operators to apply and adjust countermeasures properly and in due time. In previous studies [1] [2], DNA staining technology with SYBR Green dye was evaluated to have a sufficient detection limit and automation potential for real-time detection of microbial activity in the Saudi Aramco injection seawater. In this study, technical requirements and design solutions were defined, and an autonomous microbe sensor (AMS) prototype was constructed, tested and optimized in the laboratory, and validated in the field for automated detection of microorganisms in the harsh Saudi Arabia desert environment and injection seawater. The AMS prototype was able to monitor and follow the general microbial status in the system, including detection of periods with increased microbial growth or decreased microbial numbers following biocide injection. The infield AMS detection limit was 105 cells/mL. The long-term field testing also identified the areas for technical improvement and optimization for further development of a more robust and better performing commercial microbial sensing device.

关键词： DNA Staining Automated Monitoring Autonomous Microbe Sensor Microbial Sensor Prototype Injection Seawater

Wet flue gas desulfurization performance of 330 MW coal-fired power unit based on computational fluid dynamics region identification of flow pattern and transfer process

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Chinese Journal of Chemical Engineering 2021年第1期34卷 13-26页

作者： Jiangyuan Qu Nana Qi Kai Zhang Lifeng Li PengchengWang Beijing Key Laboratory of Emission Surveillance and Control for Thermal Power Generation North China Electric Power UniversityBeijing 102206China Key Laboratory of Power Station Energy Transfer Conversion and System(North China Electric Power University) Ministry of EducationBeijing 102206China Shanxi Hepo Power Generation company Limited Yangquan 045011China

Wet Flue Gas Desulfurization(WFGD)unit based upon spray scrubber has beenwidely employed to control SO_(2) emissions from flue gas in coal-fired power *** clarify the dependence of desulfurization performance on inter-phase transfer behaviors with non-ideal contacting patterns of flue gas and slurry droplets,three regions in spray scrubber are distinguished in terms of gas-slurry flow structures using CFD method in the Eulerian-Lagrangian framework.A comprehensive model is established by involving the transfer process between two phases and chemical reactions in aqueous phase,which is validatedwith the measured data froma WFGD scrubber of 330 MW coal-fired power *** results show that the overall uniformity degree of flue gas in whole scrubber is largely determined by the force-balanced droplets in the middle part of scrubber,which is dominated by counter-current *** momentum transfer behavior and SO_(2) chemical absorption process present the synchronicity with the evolution of gas-slurry flow pattern,whilst the heat transfer together with H_(2)O evaporation has little effect on overall absorption *** regions are firstly defined as Gas Inlet Region(GIR),Dominant Absorption Region(DAR)and Slurry Dispersed Region(SDR)from the bottom to top of ***_(2) is mainly scrubbed in DAR,which provides much more intensive interaction between two phases compared to GIR or SDR.A better understanding of the desulfurization process is obtained from the fundamental relationship between transport phenomena and chemical reactions based upon the complicated hydrodynamics of gas-slurry two-phase flow,which should be useful for designing and optimizing the scrubber in coal-fired power unit.

关键词： Wet flue gas desulfurization Gas-liquid flow Eulerian-Lagrangian model Flow pattern Transport processes Absorption

Adsorption behavior of carbon dioxide and methane in bituminous coal:A molecular simulation study

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Chinese Journal of Chemical Engineering 2016年第9期24卷 1275-1282页

作者： Jing You Li Tian Chao Zhang Hongxing Yao Wu Dou Bin Fan Songqing Hu Production Engineering Research Institute in Huabei Oilfield company of CNPC Renqiu 062552China College of Science China University of Petroleum(East China)Qingdao 266580China Huabei Oilfield Shanxi Coalbed Methane Exploration and Development Branch of CNPC Changzhi 048000China Huabei Oilfield Changzhi Coalbed Methane Exploration and Development Branch of CNPC Changzhi 046000China

The adsorption behavior of CO_2, CH_4 and their mixtures in bituminous coal was investigated in this study. First, a bituminous coal model was built through molecular dynamic(MD) simulations, and it was confirmed to be reasonable by comparing the simulated results with the experimental data. Grand Canonical Monte Carlo(GCMC)simulations were then carried out to investigate the single and binary component adsorption of CO_2 and CH_4with the built bituminous coal model. For the single component adsorption, the isosteric heat of CO_2 adsorption is greater than that of CH_4 adsorption. CO_2 also exhibits stronger electrostatic interactions with the heteroatom groups in the bituminous coal model compared with CH_4, which can account for the larger adsorption capacity of CO_2 in the bituminous coal model. In the case of binary adsorption of CO_2 and CH_4mixtures, CO_2 exhibits the preferential adsorption compared with CH_4 under the studied conditions. The adsorption selectivity of CO_2 exhibited obvious change with increasing pressure. At lower pressure, the adsorption selectivity of CO_2 shows a rapid decrease with increasing the temperature, whereas it becomes insensitive to temperature at higher pressure. Additionally, the adsorption selectivity of CO_2 decreases gradually with the increase of the bulk CO_2 mole fraction and the depth of CO_2 injection site.

关键词：沥青的煤模型吸附选择提高的煤床甲烷恢复二氧化碳隐遁分子的模拟

A non-destructive channel stress characterization for gate-allaround nanosheet transistors by confocal Raman methodology

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National Science Open 2023年第2期2卷 37-45页

作者： Ziqiang Huang Tao Liu Jingwen Yang Xin Sun Kun Chen Dawei Wang Hailong Hu Min Xu Chen Wang Saisheng Xu David Wei Zhang School of Microelectronics Fudan UniversityShanghai 200433China Shanghai Integrated Circuit Manufacturing Innovation Center company Ltd. Shanghai 200433China Zhangjiang Fudan International Innovation Center Shanghai 200433China WITec(Beijing)Scientific Technology Co. Ltd.Beijing 100027China

Non-destructive stress characterization is essential for gate-all-around(GAA)nanosheet(NS)transistors technology,while it is a big challenge to be realized on nanometer-sized GAA devices by using traditional Micro-Raman spectroscopy due to its light spot far exceeding the *** this work,a non-destructive stress characterization methodology of confocal Raman spectroscopy was proposed and performed for GAANS device *** stress evolution along the fabrication process was successfully characterized by designing high-density NS array and analyzing the linear scanned spectra in different *** related mechanism of stress evolution was systematically studied by Sentaurus process ***,applying this methodology on detecting the bending of suspended NS after channel release process was ***,this work might provide a promising solution to realize in-line characterization of channel stress in GAA NS transistors and process monitor of NS channel integrity.

关键词： non-destructive characterization channel stress gate all around(GAA) confocal Raman

鄂尔多斯盆地上三叠统延长组长7段泥级凝灰质岩的发现及识别

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Journal of Central South University 2020年第6期27卷 1814-1827页

作者：郑庆华刘行军柳益群周鼎武尤继元杨开艳 School of Chemistry&Chemical Engineering Yulin UniversityYulin 719000China Changqing Division China Petroleum Well Logging Limited CompanyXi’an 710201China Department of Geology Northwest UniversityXi’an 710069China College of Earth Science and Engineering Shandong University of Science and TechnologyQingdao 266510China Fengcheng Field Operation District PetroChina Xinjiang Oilfield CompanyKaramay 834000China

在鄂尔多斯盆地上三叠统延长组长73亚段中,发现一些能肉眼观察到的"泥级泥岩"(如泥级黑色泥岩、泥级油页岩等),实际为富含黑色石油、沥青质等黑色有机质并具有较强生烃能力的泥级凝灰岩、泥级沉凝灰岩、泥级凝灰质沉积岩等泥级凝灰质岩... 详细信息

在鄂尔多斯盆地上三叠统延长组长73亚段中,发现一些能肉眼观察到的"泥级泥岩"(如泥级黑色泥岩、泥级油页岩等),实际为富含黑色石油、沥青质等黑色有机质并具有较强生烃能力的泥级凝灰岩、泥级沉凝灰岩、泥级凝灰质沉积岩等泥级凝灰质岩,可定义为泥级凝灰质烃源岩。泥级凝灰质岩的识别对长7段页岩油的勘探开发具有重要意义。通过钻井取心及野外露头剖面观察,电子探针薄片的显微镜镜下观察,全岩主量元素、微量元素、稀土元素等无机地球化学分析,认为富含黑色石油、沥青质等黑色有机质的泥级凝灰质岩,特别是泥级凝灰岩主要具有以下识别标志:仅少量黑色有机质覆盖的部位主要呈灰白色、土黄褐色和紫灰色,斑脱岩化作用强烈时颜色杂乱;脱玻化-重结晶作用强烈时,生成大量呈片状定向分布的铝硅酸盐矿物,在电子探针薄片的偏光显微镜正交光下插入石膏试板、旋转载物台,干涉色整体呈现最低干涉色一级黄、最高干涉色二级蓝绿的规律变化;在Ti O2-Si O2图解上落在火成岩范围,微量元素和稀土元素蜘蛛图特征大体相似,反映同源特征。结果表明,鄂尔多斯盆地上三叠统延长组长73亚段可能发育很多泥级凝灰质岩。

关键词：鄂尔多斯盆地长7段泥级泥岩泥级凝灰质岩岩性识别

Automated Picture Crawling for Electrical Power Maintenance

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Journal of Computer and Communications 2017年第3期5卷 60-68页

作者： Bing He Xuqi Zhang Mei Wang Xiu Cao Zikun Zhuang Shanghai Inspection & Maintenance of Power company Shanghai China School of Computer Science Fudan University Shanghai China

Defect recognition based on picture analysis is one of the most important means to detect key failure points or damages. However, the recognition rate is low due to the limited number of pictures collected on site, so the computer training set is limited, which leads to a lack of studying and training. Meanwhile, the internet provides a large number of related pictures which can be used as an important data source for training picture analyzing engines. By using an internet spider under certain rules, one can freely collect information on the internet. The internet spider described in this paper can automatically collect related images from the internet as well as search for similar images by leveraging on a local seed picture. This spider also has a parallel version, which can give significant performance boost when run.

关键词： Electrical Power Maintenance Web Crawler Image Search Parallel

Doing a Good Job in Inspection and Maintenance of Facilities and Equipments in Bulk Curing Barn

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Plant Diseases and Pests 2022年第3期13卷 35-37页

作者： Yonghua CHEN Hongquan SUN Pengzhen LONG Guoquan LIU Taiwei LIU Pengyu LU Tongren Tobacco company in Guizhou Province Tongren 554300China

Due to the limited management funds and insufficient management efforts,curing barns in traditional tobacco area are outdated and equipments are seriously damaged,which affects the normal operation and increases the maintenance cost of bulk curing barns,bringing adverse effects on tobacco leaf curing in the coming year and the sustainable development of tobacco industry in the *** ensure the normal operation of curing barns and effectively prolong the service life of curing barns during tobacco leaf curing,we should do a good job in the publicity of management and maintenance,improve the system of management and maintenance,raise funds for management and maintenance,inspect facilities and equipments,carefully maintain equipments in curing barn and strictly perform examination and inspection.

关键词： Bulk curing barn Facilities and equipments Inspection Maintenance

Mineral Deposit Model of Cu-Fe-Au Skarn System in the Edongnan Region, Eastern China

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Acta Geologica Sinica(English Edition) 2020年第6期94卷 1797-1807页

作者： XIE Guiqing MAO Jingwen ZHU Qiaoqiao HAN Yingxiao LI Wei DUAN Chao YE Hui Institute of Earth Sciences China University of GeosciencesBeijing 100083China MLR Key Laboratory of Metallogeny and Mineral Assessment Institute of Mineral ResourcesCAGSBeijing 100037China Faculty of Geosciences and Resources China University of GeosciencesBeijing 100083China Hubei Sanxin Gold Copper Limited company DayeHubei 435102China

Cu and Fe skarns are the world's most abundant and largest skarn type deposits,especially in China,and Au-rich skarn deposits have received much attention in the past two decades and yet there are few papers focused on schematic mineral deposit models of Cu-Fe-Au skarn *** types of Au-rich deposits are recognized in the Edongnan region,Middle-Lower Yangtze River metallogenic belt:~140 Ma Cu-Au and Au-Cu skarn deposits and distal Au-Tl deposits.137-148 Ma Cu-Fe and 130-133 Ma Fe skarn deposits are recognized in the Edongnan *** Cu-Fe skarn deposits have a greater contribution of mantle components than the Fe skarn deposits,and the hydrothermal fluids responsible for formation of the Fe skarn deposits involved a greater contribution from evaporitic sedimentary rocks compared to Cu-Fe skarn *** carbonate-hosted Au-Tl deposits in the Edongnan region are interpreted as distal products of Cu-Au skarn mineralization.A new schematic mineral deposit model of the Cu-Fe-Au skarn system is proposed to illustrate the relationship between the Cu-Fe-Au skarn mineralization,the evaporitic sedimentary rocks,and distal Au-Tl *** model has important implications for the exploration for carbonate-hosted Au-Tl deposits in the more distal parts of Cu-Au skarn systems,and Fe skarn deposits with the occurrence of gypsum-bearing host sedimentary rocks in the MLYRB,and possibly elsewhere.

关键词： mineral deposit model exploration Cu-Fe-Au skarn system Middle-Lower Yangtze River metallogenic belt

Developing a Super-lift Luo-converter with Integration of Buck Converters for Electric Vehicle Applications

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CSEE Journal of Power and Energy Systems 2021年第4期7卷 811-820页

作者： Behdad Faridpak Meisam Farrokhifar Mojtaba Nasiri Arman Alahyari Nasser Sadoogi Faculty of Electrical and Computer Engineering University of TabrizTabriz ***Iran Center for Energy Science and Technology Skolkovo Institute of Science and TechnologyMoscow 121205Russia Solar Energy Applications Group School of EngineeringTrinity College DublinD02 PN40 DublinIreland Research and Development Department of Jam Hoor Tabriz company Tabriz ***Iran

In this paper,a DC-DC multi-port converter is introduced by integrating a super-lift and a buck converter(SLBC).The proposed single-input dual-output(SIDO)converter has conventional positive output voltage super-lift advantages while simultaneously generating a step・up voltage by Luo・converter and a step-down voltage by the buck *** this structure,without utilizing electromagnetic components to generate a dual output,the ripple in output voltages is kept ***,the introduced SLBC has a simple structure and an appropriate control method providing a wide range of output ***,to illustrate the advantages of the proposed SIDO converter,a comparison with other similar configurations is carried ***,simulation and experiment results indicate a considerable reduction in conduction losses compared to other SIDO converters in the same *** operation accuracy of SLBC is validated by performing several simulations in PSCAD/EMTDC software and testing a 150W prototype in the laboratory.

关键词： DC-DC converter Luo-converter single-input dual-output(SIDO) super-lift(SL) high voltage gain