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摘要 ：
针对燃气产业转型升级的需求,基于高精准的北斗定位技术、5G、物联网、人工智能等前沿技术,对燃气行业业务链条进行分析,针对门站-管线-调压站-用户燃气业务链条的各个环节创新推出数字化、智慧化的各项应用.通过分析工业互联网平台建设的关键技术问题,提出基于燃气业务特点构建城市燃气工业互联网平台,以满足燃气行业的信息化需求,提高管网运营安全和运营效率,大幅提升企业经济效益和综合竞争力,推进基于北斗应用的工业互联网平台赋能燃气行业数字化转型.
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| GB/T 7714 | 贾婧媛 , 李宁 , 杨梦馨 et al. 基于北斗时空信息的城市燃气工业互联网平台 [J]. | 信息通信技术 , 2021 , 15 (3) : 7-13 . |
| MLA | 贾婧媛 et al. "基于北斗时空信息的城市燃气工业互联网平台" . | 信息通信技术 15 . 3 (2021) : 7-13 . |
| APA | 贾婧媛 , 李宁 , 杨梦馨 , 王博 . 基于北斗时空信息的城市燃气工业互联网平台 . | 信息通信技术 , 2021 , 15 (3) , 7-13 . |
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摘要 ：
超疏水表面能够通过形成水下气液界面有效降低流体的摩擦阻力,具有良好的减阻性能,在水下航行器、微流体器件及管道运输等领域有着广阔的应用前景。本文基于超疏水表面的润湿特性,讨论介绍了其表面产生减阻现象的机理,重点总结了国内外超疏水表面减阻效率的影响因素与水下气液界面增稳、恢复问题的研究现状。最后,对超疏水表面在水下减阻应用上面临的问题和发展前景进行了探讨,为超疏水表面水下减阻技术的研发工作提供参考。
关键词 ：
减阻 减阻 微结构 微结构 气液界面 气液界面 超疏水表面 超疏水表面
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| GB/T 7714 | 张春来 , 王潇 , 吴银涛 et al. 超疏水表面水下减阻技术研究进展 [J]. | 功能材料与器件学报 , 2021 , 27 (05) : 445-455 . |
| MLA | 张春来 et al. "超疏水表面水下减阻技术研究进展" . | 功能材料与器件学报 27 . 05 (2021) : 445-455 . |
| APA | 张春来 , 王潇 , 吴银涛 , 王波 . 超疏水表面水下减阻技术研究进展 . | 功能材料与器件学报 , 2021 , 27 (05) , 445-455 . |
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摘要 ：
为了制备形貌良好性能优良的硅纳米线,利用金属辅助化学刻蚀法,在AgNO3和HF的混合水溶液中沉积Ag颗粒,使之作为刻蚀反应的催化剂,并在H2 O2和HF的混合溶液中进行刻蚀反应制备硅纳米线.通过改变实验中的工艺参数,包括刻蚀反应时间、刻蚀反应温度、刻蚀液中HF浓度及反应过程中的搅拌速度,用扫描电子显微镜(scanning electron microscope,SEM)图像进行对比分析,讨论制备优良硅纳米线的最佳参数.结果表明:当刻蚀反应时间为1 h,反应温度在室温下,HF浓度为4.8 mol/L时,硅纳米线的表面形貌是最好的,但对刻蚀液的搅拌会严重破坏硅纳米线的表面形貌,不利于优良硅纳米线的制备.
关键词 ：
HF浓度 HF浓度 刻蚀反应时间 刻蚀反应时间 刻蚀反应温度 刻蚀反应温度 形貌结构 形貌结构 搅拌速度 搅拌速度 硅纳米线 硅纳米线 金属辅助化学刻蚀法 金属辅助化学刻蚀法
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| GB/T 7714 | 王波 , 高灿灿 , 薛睿 . 金属辅助化学刻蚀法制备硅纳米线及其工艺参数优化 [J]. | 北京工业大学学报 , 2021 , 47 (2) : 179-185 . |
| MLA | 王波 et al. "金属辅助化学刻蚀法制备硅纳米线及其工艺参数优化" . | 北京工业大学学报 47 . 2 (2021) : 179-185 . |
| APA | 王波 , 高灿灿 , 薛睿 . 金属辅助化学刻蚀法制备硅纳米线及其工艺参数优化 . | 北京工业大学学报 , 2021 , 47 (2) , 179-185 . |
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摘要 ：
金属辅助化学刻蚀法制备硅纳米线及其工艺参数优化
关键词 ：
HF浓度 HF浓度 刻蚀反应时间 刻蚀反应时间 刻蚀反应温度 刻蚀反应温度 形貌结构 形貌结构 搅拌速度 搅拌速度 硅纳米线 硅纳米线 金属辅助化学刻蚀法 金属辅助化学刻蚀法
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| GB/T 7714 | 王波 , 高灿灿 , 薛睿 et al. 金属辅助化学刻蚀法制备硅纳米线及其工艺参数优化 [J]. | 王波 , 2021 , 47 (2) : 179-185 . |
| MLA | 王波 et al. "金属辅助化学刻蚀法制备硅纳米线及其工艺参数优化" . | 王波 47 . 2 (2021) : 179-185 . |
| APA | 王波 , 高灿灿 , 薛睿 , 北京工业大学学报 . 金属辅助化学刻蚀法制备硅纳米线及其工艺参数优化 . | 王波 , 2021 , 47 (2) , 179-185 . |
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摘要 ：
为剖析城市轨道交通突发事件下乘客出行选择规律,提出基于Logit模型和非线性回归方法的乘客选择影响因素分析方法.首先,从乘客个体属性、出行属性和突发事件属性3个方面确定影响出行选择的主要因素,并进行敏感性分析,在此基础上提出客流浮动率与空间影响系数指标,探索乘客出行选择与时空属性的关系.结果表明:年龄、职业和收入对乘客选择有显著影响,通勤乘客倾向于城市轨道交通出行;乘客选择受事发时间影响明显,而受事发位置或出行距离单一指标影响较小,但空间影响系数对出行选择影响显著.研究可以为突发事件客流预测提供支持,并辅助制定突发客流疏散政策.
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| GB/T 7714 | 李臣 , 陈艳艳 , 周雨阳 et al. 城市轨道交通突发事件下乘客出行选择影响因素研究 [J]. | 铁道运输与经济 , 2021 , 43 (7) : 105-111 . |
| MLA | 李臣 et al. "城市轨道交通突发事件下乘客出行选择影响因素研究" . | 铁道运输与经济 43 . 7 (2021) : 105-111 . |
| APA | 李臣 , 陈艳艳 , 周雨阳 , 黄建玲 , 汪波 . 城市轨道交通突发事件下乘客出行选择影响因素研究 . | 铁道运输与经济 , 2021 , 43 (7) , 105-111 . |
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摘要 ：
The (002) oriented GaN nanostructured films prepared by pulsed laser deposition (PLD) on n-type Si (100) substrates were treated by H- and O-plasma, finding both treatments do not make the sizable changes in crystalline structure and morphology of GaN nanofilms. However, the field emission (FE) performance of GaN nanofilms is considerably improved by H-plasma treatment (H-GaN) but deteriorated by O-plasma treatment (O-GaN). The turn-on fields, Eon, for H- and O-plasma treated GaN nanofilms are determined to be 0.52 and 1.79 V μm−1, respectively, in contrast with that of pristine GaN nanofilms, 0.95 V μm−1. The improvement of FE performance by the H-plasma treatments could be attributed to the reasons of the reduced surface potential barrier, the increased electron concentration, the increased surface conductivity, and the increased effective emission area. The first-principles calculations represents that the experimental and theoretical work function results have the same trend with the descending sequence of O-plasma treated GaN > pristine GaN > the H-plasma treated GaN. © 2021 IOP Publishing Ltd
关键词 ：
Calculations Calculations Field emission Field emission Gallium nitride Gallium nitride Hydrogen Hydrogen III-V semiconductors III-V semiconductors Morphology Morphology Plasma applications Plasma applications Pulsed laser deposition Pulsed laser deposition Silicon Silicon Surface potential Surface potential
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| GB/T 7714 | Song, Zhi-Wei , Wang, Changhao , Guo, Gen-Cai et al. Field emission of GaN nanofilms on Si substrates enhanced by hydrogen plasma treatment [J]. | Surface Topography: Metrology and Properties , 2021 , 9 (1) . |
| MLA | Song, Zhi-Wei et al. "Field emission of GaN nanofilms on Si substrates enhanced by hydrogen plasma treatment" . | Surface Topography: Metrology and Properties 9 . 1 (2021) . |
| APA | Song, Zhi-Wei , Wang, Changhao , Guo, Gen-Cai , Yang, Meng-Qi , Liang, Qi , Wang, Bo et al. Field emission of GaN nanofilms on Si substrates enhanced by hydrogen plasma treatment . | Surface Topography: Metrology and Properties , 2021 , 9 (1) . |
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摘要 ：
Achieving the anammox process in suspended sludge system without supplementing carriers or inoculating anammox bacteria is a challenging topic, especially inmunicipal wastewater treatment. Long-termmaintenance of partial nitrificationwas realized in this study bymaintaining dissolved oxygen (DO) below0.5 mg/L, by using a DO meter and controlling the oxygen diffuser apparatus in anaerobic-aerobic-anoxicmode in a sequencing batch reactor, leading to successful enrichment of anammox bacteria. Under 134 maintenance days of partial nitrification with an average nitrite accumulation rate of 94.5%, anammox bacteria gradually enriched in suspended sludge with an increasing relative abundance from 0% on 18th day to 0.44% on 124th day, and the nitrogen removal efficiency improved from 30% to 85%. (NO2-)-N-15 N isotope labeling test showed that activities of anammox and denitrification were 1.48 and 1.22 mu molN/(gVSS.h), respectively. The contribution of anammox in the anoxic stage to nitrogen removal was 20%, but anammox N removal continued in the aerobic stage, as well. Long-term maintenance of partial nitrification and lowdissolved oxygen levelswere the key factors leading to enrichment of anammox bacteria. (C) 2021 Elsevier B.V. All rights reserved.
关键词 ：
Anammox Anammox Municipal wastewater Municipal wastewater Natural enrichment Natural enrichment Nitrogen removal Nitrogen removal
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| GB/T 7714 | Gong, Qingteng , Wang, Bo , Gong, Xiaofei et al. Anammox bacteria enrich naturally in suspended sludge system during partial nitrification of domestic sewage and contribute to nitrogen removal [J]. | SCIENCE OF THE TOTAL ENVIRONMENT , 2021 , 787 . |
| MLA | Gong, Qingteng et al. "Anammox bacteria enrich naturally in suspended sludge system during partial nitrification of domestic sewage and contribute to nitrogen removal" . | SCIENCE OF THE TOTAL ENVIRONMENT 787 (2021) . |
| APA | Gong, Qingteng , Wang, Bo , Gong, Xiaofei , Liu, Xuefan , Peng, Yongzhen . Anammox bacteria enrich naturally in suspended sludge system during partial nitrification of domestic sewage and contribute to nitrogen removal . | SCIENCE OF THE TOTAL ENVIRONMENT , 2021 , 787 . |
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摘要 ：
Partial-denitrification (PD; NO3??NO2?) has recently been proposed to be a feasible choice of NO2?-N supply for anammox bacteria. In this study, an aerobic/anoxic process for treating domestic wastewater was operated for 176 days to evaluate the feasibility of using sludge fermentation liquid for partial denitrification of the wastewater. Results show that, with the ratio of C/N (COD/ NO3?-N) increased at anoxic stage, the average NO2?-N concentration in the effluent and nitrate-to-nitrite transformation ratio (NTR) at anoxic stage showed relative growth. High-throughput sequencing analysis demonstrated that the enhancement of PD can be explained by the increases of Thauera, Paracoccus and Enterobacteriaceae. Moreover, Candidatus_Brocadia (0.13%) was detected as the predominant anammox bacteria. Ex-situ isotopic tracing technique analysis assessed that the ratio of anammox role (ra%) was 7.29%. This study has a great potential for being coupled with the anammox bacteria for advanced nitrogen removal.
关键词 ：
Anammox Anammox Fermentation liquid Fermentation liquid Nitrite accumulation Nitrite accumulation Partial denitrification Partial denitrification
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| GB/T 7714 | Liu, Xuefan , Wang, Bo , Peng, Yongzhen et al. A novel strategy for enhancing the partial denitrification to treat domestic wastewater by feeding sludge fermentation liquid [J]. | BIORESOURCE TECHNOLOGY , 2021 , 330 . |
| MLA | Liu, Xuefan et al. "A novel strategy for enhancing the partial denitrification to treat domestic wastewater by feeding sludge fermentation liquid" . | BIORESOURCE TECHNOLOGY 330 (2021) . |
| APA | Liu, Xuefan , Wang, Bo , Peng, Yongzhen , Gong, Xiaofei , Gong, Qingteng , Li, Xiyao . A novel strategy for enhancing the partial denitrification to treat domestic wastewater by feeding sludge fermentation liquid . | BIORESOURCE TECHNOLOGY , 2021 , 330 . |
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摘要 ：
Endogenous denitrification (ED) is an effective approach to achieve advanced nitrogen removal for low COD/N (C/N) municipal wastewater, in which internal carbon sources are used for denitrification. However, phosphorus-accumulating organisms (PAOs) and denitrifying ordinary heterotrophic organisms (DOHOs) outcompeting glycogen-accumulating organisms (GAOs) for carbon sources decreases total inorganic nitrogen (TIN) removal efficiency. This study proposed a novel side-stream sludge treatment strategy, i.e., through phosphorus famine, to selectively strengthen GAOs. Two sequencing batch reactors (SBR) were used, with one served as an anaerobic/aerobic/anoxic SBR (AOA-SBR) and the other as a side SBR. Side-stream phosphorus famine treatment was conducted three times during 140 days’ experiment, of which 20–30% of the sludge collected from the AOA-SBR was imposed to phosphorus famine condition in the side SBR for 4 days (24 cycles). Results showed that the average TIN and phosphorus removal efficiencies were 88.76% and 95.31%, and the average TIN and phosphorus in the effluent were 8.01 and 0.30 mg/L, respectively, treating low C/N (~3.25) municipal wastewater in the AOA-SBR. The relative abundance of PAOs decreased from 3.23% to 2.15% and that of DOHOs reduced by 62.78%. In contrast, the abundance of GAOs increased from 3.09% to18.25%, which should be the key reason for the improvement of the ED efficiency. Moreover, the enrichment of GAOs promoted ED simultaneously using glycogen and poly-β-hydroxyalkanoates (PHA) as carbon sources. The strategy of side-stream treatment proved the potential of rapid proliferation of GAOs while achieving improved nitrogen removal. © 2021 Elsevier B.V.
关键词 ：
Activated sludge process Activated sludge process Anoxic water Anoxic water Batch reactors Batch reactors Biology Biology Carbon Carbon Denitrification Denitrification Efficiency Efficiency Effluents Effluents Nitrogen removal Nitrogen removal Phosphorus Phosphorus Sewage Sewage Wastewater treatment Wastewater treatment
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| GB/T 7714 | Dan, Qiongpeng , Peng, Yongzhen , Wang, Bo et al. Side-stream phosphorus famine selectively strengthens glycogen accumulating organisms (GAOs) for advanced nutrient removal in an anaerobic-aerobic-anoxic system [J]. | Chemical Engineering Journal , 2021 , 420 . |
| MLA | Dan, Qiongpeng et al. "Side-stream phosphorus famine selectively strengthens glycogen accumulating organisms (GAOs) for advanced nutrient removal in an anaerobic-aerobic-anoxic system" . | Chemical Engineering Journal 420 (2021) . |
| APA | Dan, Qiongpeng , Peng, Yongzhen , Wang, Bo , Wang, Qi , Sun, Tiantian . Side-stream phosphorus famine selectively strengthens glycogen accumulating organisms (GAOs) for advanced nutrient removal in an anaerobic-aerobic-anoxic system . | Chemical Engineering Journal , 2021 , 420 . |
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摘要 ：
The vertical van der Waals heterostructures based on 2-D materials have attracted tremendous attention in optoelectronic devices as they can offer perfect interface without dangling bonds, atomic layer thicknesses, and conveniently tunable energy band alignment. However, the carrier transport mechanism in vertically stacked van der Waals heterostructure photodetectors is usually neglected in regards of photoresponse enhancement strategy, leading to low photoresponsivity and quantum efficiency. Here, we report a vertically stacked tunneling photodetector based on WSe2/graphene/WS2 van der Waals heterostructure. By introducing graphene film into the WSe2/WS2 interface, the interface composition was ameliorated and the Fowler-Nordheim tunneling (FNT) was enhanced with the reduced tunneling barrier height and thickness, caused by the elevated energy level of electrons since strong electron-electron interaction, ultrafast thermalization (similar to 50 fs), and massless Dirac electrons of graphene. Therefore, the device exhibits a high photocurrent/dark current ratio (>10(4)), fast response time (similar to 300 mu s), high detectivity (similar to 1.58 x 10(12) Jones), and high responsivity (429 mA W-1) across a broad spectral range till 1 mu m at room temperature. The optimized detectivity and responsivity are about 150 times and 50 times higher than WSe2/WS2 device without graphene, respectively. These results contribute to offer a novel and versatile strategy for overcoming the performance limitation in van der Waals photodetector.
关键词 ：
Electrodes Electrodes Graphene Graphene heterojunction heterojunction Heterojunctions Heterojunctions Performance evaluation Performance evaluation photodetector photodetector Photodetectors Photodetectors Substrates Substrates tunneling tunneling Tunneling Tunneling
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| GB/T 7714 | You, Congya , Deng, Wenjie , Chen, Xiaoqing et al. Enhanced Photodetection Performance in Graphene-Assisted Tunneling Photodetector [J]. | IEEE TRANSACTIONS ON ELECTRON DEVICES , 2021 , 68 (4) : 1702-1709 . |
| MLA | You, Congya et al. "Enhanced Photodetection Performance in Graphene-Assisted Tunneling Photodetector" . | IEEE TRANSACTIONS ON ELECTRON DEVICES 68 . 4 (2021) : 1702-1709 . |
| APA | You, Congya , Deng, Wenjie , Chen, Xiaoqing , Zhou, Wencai , Zheng, Zilong , An, Boxing et al. Enhanced Photodetection Performance in Graphene-Assisted Tunneling Photodetector . | IEEE TRANSACTIONS ON ELECTRON DEVICES , 2021 , 68 (4) , 1702-1709 . |
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