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学者姓名:张健
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摘要 :
Commuting carbon emissions (CCE) constitute a significant portion of urban carbon emissions and exert a notable influence on urban land use policies and spatial planning strategies. Traditional methods for estimating CCEs have many disadvantages and are less accurate in terms of space and time. In this study, a typical weekday in the main urban area of Beijing is selected as the research object. First, taxi CCEs are estimated by an improved VSP model based on GPS trajectory data. Second, taxi CCEs are obtained by filtering the commuting trajectories based on POI data and taxi trajectories. Finally, the spatial distribution characteristics of taxi CCEs are analysed by spatial autocorrelation. The results show that (1) the morning peak commuting carbon emission in Beijing reaches 5338.04 kg/h, accounting for 26.13 % of the total carbon emission of cab trips; the evening peak commuting carbon emission reaches 3858.73 kg/h, accounting for 18.89 % of the total carbon emission of cab trips; (2) the spatial distribution of CCE in Beijing shows that the western part of the core area is higher, while the northeast and southwest of the central city are higher; (3) High-value commuting carbon emission areas are mainly concentrated in regions with a more developed financial industry; the carbon emissions from the city ring road and airport highway significantly surpass those of other areas. This research introduces an innovative approach to examine CCE and measure it within various functional zones of urban areas. The findings of this study can serve as valuable guidance for informing future urban spatial configurations and land use policies, leading to more effective and sustainable urban development.
关键词 :
VSP model VSP model GPS trajectory data GPS trajectory data Commuting carbon emissions Commuting carbon emissions Urban land use Urban land use Beijing Beijing
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GB/T 7714 | Tian, Dongwei , Zhang, Jian , Li, Boxuan et al. Spatial analysis of commuting carbon emissions in main urban area of Beijing: A GPS trajectory-based approach [J]. | ECOLOGICAL INDICATORS , 2024 , 159 . |
MLA | Tian, Dongwei et al. "Spatial analysis of commuting carbon emissions in main urban area of Beijing: A GPS trajectory-based approach" . | ECOLOGICAL INDICATORS 159 (2024) . |
APA | Tian, Dongwei , Zhang, Jian , Li, Boxuan , Xia, Chuyu , Zhu, Yongqiang , Zhou, Chenxi et al. Spatial analysis of commuting carbon emissions in main urban area of Beijing: A GPS trajectory-based approach . | ECOLOGICAL INDICATORS , 2024 , 159 . |
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摘要 :
Green space accessibility affects housing prices, which is an issue that has been underappreciated. This paper takes Beijing's central urban area as an example. First, the Gaussian-based two-step floating catchment area (G2SFCA) method is used to measure four levels (community green space, subdistrict green space, district green space, and municipal green space) of green space accessibility by multiple travel modes (walking, cycling and driving). Second, the spatial error model (SEM) is used to examine the factors influencing housing prices. Finally, the geographically weighted regression (GWR) model is introduced to explore the spatial relationship between green space accessibility by walking, cycling and driving and housing prices. The results show the following: (1) The SEM shows that only driving accessibility has a positive spatial spillover effect on housing prices, indicating that the spatial inequity of local community green spaces by driving will exacerbate surrounding spatial inequity. (2) The GWR model shows that from the perspective of walking and driving accessibility, most areas within the Second Ring Road show spatial equity in green spaces, while cycling accessibility shows that the spatial inequity of green space exists only outside the Second Ring Road. (3) We find that municipal green space and subdistrict green space most affect the spatial equity of green spaces. Community green space, which is not open to the public, plays a minimal role. Regarding walking and driving accessibility, municipal green space increases the spatial equity of green spaces. In contrast, this type of green space can promote the spatial equity of green spaces regarding cycling accessibility. This study can significantly improve the quality of urban settlements in the Global South and has important implications for policy-makers, planners, and stakeholders in other large cities worldwide to create green and liveable cities.
关键词 :
Housing price Housing price Green space accessibility Green space accessibility Beijing Beijing Multiple travel modes Multiple travel modes Spatial equity Spatial equity
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GB/T 7714 | Tian, Dongwei , Wang, Jian , Xia, Chuyu et al. The relationship between green space accessibility by multiple travel modes and housing prices: A case study of Beijing [J]. | CITIES , 2023 , 145 . |
MLA | Tian, Dongwei et al. "The relationship between green space accessibility by multiple travel modes and housing prices: A case study of Beijing" . | CITIES 145 (2023) . |
APA | Tian, Dongwei , Wang, Jian , Xia, Chuyu , Zhang, Jian , Zhou, Jun , Tian, Zihao et al. The relationship between green space accessibility by multiple travel modes and housing prices: A case study of Beijing . | CITIES , 2023 , 145 . |
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摘要 :
一种基于特征数据的电动公交车行程能耗快速预测方法属于交通领域。本发明为了电动公交车车队充电计划提供车辆能耗预测值,基于历史数据,对车辆行程能耗进行预测。考虑车辆能耗与特征数据的关系,发明了一种基于特征数据的电动公交车能耗的快速计算方法。该方法首先收集电动公交车历史上的电量数据和行程数据,提取稳定的关键特征,寻找与新行程的特征最接近的历史数据,以历史能耗数据的均值作为新行程能耗预测值。本发明在已有的电动公交车运营数据中,充分挖掘车辆行程能耗特征;提出了快速精准预测电动公交车能耗的新方法。
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GB/T 7714 | 何佳 , 史淼 , 张健 et al. 一种基于特征数据的电动公交车行程能耗快速预测方法 : CN202211299932.1[P]. | 2022-10-24 . |
MLA | 何佳 et al. "一种基于特征数据的电动公交车行程能耗快速预测方法" : CN202211299932.1. | 2022-10-24 . |
APA | 何佳 , 史淼 , 张健 , 贺正冰 , 陈宁 , 陈艳艳 . 一种基于特征数据的电动公交车行程能耗快速预测方法 : CN202211299932.1. | 2022-10-24 . |
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摘要 :
本发明公开了基于多维感知系统的城市公共空间被动式公众参与方法,包括S1、针对整体进行功能区划分;S2、根据所述功能区使用特点选择多维感知系统传感器类型,并按一定密度在不同功能区安装,实现区域全覆盖;S3、预设边缘计算阈值,进行有效信息记录回传;S4、在预设时间段内采集空间使用者使用信息,并进行信息留存;S5、根据指标对照表,将空间信息结合客观要素转化为公众参与的量化评价结果;S6、根据所述量化评价结果,形成公众参与成果,支撑设计优化。本发明旨在利用多维感知系统,形成城市公共空间被动式公众参与方法,实现公共空间使用者被动式公众参与,在无客观因素影响下覆盖全空间、全时段、全使用人群。
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GB/T 7714 | 张健 , 王宇琛 , 陈硕 et al. 基于多维感知系统的城市公共空间被动式公众参与方法 : CN202210606826.7[P]. | 2022-05-31 . |
MLA | 张健 et al. "基于多维感知系统的城市公共空间被动式公众参与方法" : CN202210606826.7. | 2022-05-31 . |
APA | 张健 , 王宇琛 , 陈硕 , 吉彦平 , 李梦 , 李婧 et al. 基于多维感知系统的城市公共空间被动式公众参与方法 : CN202210606826.7. | 2022-05-31 . |
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摘要 :
本发明提出一种基于大数据的居民点出行碳排放的核算方法,所述方法主要包括:利用出租车轨迹大数据测算出租车碳排放量;根据出租车轨迹的上、下车点及其步行范围内的POI,确定出租车轨迹的出行类型;将轨迹碳排放汇总至居民点,获得居民点的出行碳排放。本发明充分挖掘出租车大数据的各种时间、空间信息,从出租车轨迹大数据当中筛选出符合要求的通勤样本进行碳排放的计算;所获得的通勤样本的准确性、实时性、普适性均显著优于传统调研方法。
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GB/T 7714 | 夏楚瑜 , 李淞 , 薛飞 et al. 一种基于大数据的居民点出行碳排放的核算方法 : CN202210651549.1[P]. | 2022-06-10 . |
MLA | 夏楚瑜 et al. "一种基于大数据的居民点出行碳排放的核算方法" : CN202210651549.1. | 2022-06-10 . |
APA | 夏楚瑜 , 李淞 , 薛飞 , 张健 , 李强 . 一种基于大数据的居民点出行碳排放的核算方法 : CN202210651549.1. | 2022-06-10 . |
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摘要 :
本发明提供了一种基于前后车轨迹的驾驶人实时反应时间提取方法。本发明提供的提取方法可在不额外增加过多设备的前提下,快速提取驾驶人实时反应时间并判断驾驶人驾驶状态。本发明利用前后车辆的轨迹数据和交通流理论,将轨迹数据扩展为包含前车速度、前车速度、预反应时间、预最小间隔、波速和通过率的参数集,利用统计分析方法计算关键参数实际波速,得到实时反应时间,进而降低预警成本并提高驾驶安全性。
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GB/T 7714 | 何佳 , 曲洁 , 张健 et al. 一种基于前后车轨迹的驾驶人实时反应时间提取方法 : CN202111249371.X[P]. | 2021-10-26 . |
MLA | 何佳 et al. "一种基于前后车轨迹的驾驶人实时反应时间提取方法" : CN202111249371.X. | 2021-10-26 . |
APA | 何佳 , 曲洁 , 张健 , 贺正冰 , 陈宁 , 陈艳艳 . 一种基于前后车轨迹的驾驶人实时反应时间提取方法 : CN202111249371.X. | 2021-10-26 . |
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摘要 :
本发明公开一种基于变分模态分解和预测性能的单模态子信号选择方法。首先,依据经验确定多个进行变分模态分解(VMD)所必需设定的分解层数的取值;接着,采用VMD将原始机械信号分解为具有不同带宽和时间尺度的时域单模态子信号,进一步变换至频域获得候选单模态子信号频谱集合;最后,基于这些候选单模态子信号频谱集合构建候选磨机负荷参数预测子模型,并进一步构建选择性集成模型获得约简单模态子信号频谱集合,再依据实际需求和模型预测性能选择得到具有较强互补特性的单模态子信号集合。
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GB/T 7714 | 刘卓 , 汤健 , 张健 et al. 基于变分模态分解和预测性能的单模态子信号选择方法 : CN202010198524.1[P]. | 2020-03-20 . |
MLA | 刘卓 et al. "基于变分模态分解和预测性能的单模态子信号选择方法" : CN202010198524.1. | 2020-03-20 . |
APA | 刘卓 , 汤健 , 张健 , 余刚 , 赵建军 . 基于变分模态分解和预测性能的单模态子信号选择方法 : CN202010198524.1. | 2020-03-20 . |
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摘要 :
Three new water-stable In(III)-based metalorganic frameworks, namely, [In-3(TTTA)(2)(OH)(3)(H2O)]center dot(DMA)3 (BUT-70, DMA = N,N-dimethylacetamide), [In-3(TTTA)(2)(CH3O)(3)] (BUT-70A), and [In-3(TTTA)(2)(OH)(3)] (BUT-70B), with rod-shaped secondary building units (SBUs) and an new acrylate-based ligand, (2E,2'E,2 '' E)-3,3',3 ''-(2,4,6-trimethylbenzene-1,3,5-triyl)-triacrylate (TTTA(3)) were obtained and structurally characterized. BUT-70A and -70B were generated in a single-crystal to single-crystal transformation fashion from BUT-70 through guest exchange followed by their removal. The solvents used for guest exchange were methanol and dichloromethane, respectively. Single-crystal structure analyses show that the guest exchange and removal process is accompanied by the substitution of coordinated water molecules of In(III) centers with uncoordinated carboxylate O atoms of TTTA(3) ligands. Moreover, hydroxyl groups bridging two In(III) centers are also replaced by methoxyl groups in the transformation from BUT-70 to -70A. Overall, three metalorganic frameworks (MOFs) are constructed by infinite chains consisting of corner-sharing InO4(OR)(2) (R = H or Me) octahedral entities, which are interconnected by TTTA(3) ligands to form three-dimensional frameworks. Unlike most reported MOFs with infinite chains as SBUs, such as well-known MIL-53 and M-MOF-74, which have one-dimensional channels along the chain direction, the BUT-70 series contain two-dimensional intersecting channels. The BrunauerEmmettTeller surface area and pore volume of BUT-70A were estimated to be 460 m(2) g(1) and 0.18 cm(3) g(1), respectively, which are obviously lower than those of BUT-70B (695 m(2) g(1) and 0.29 cm(3) g(1)). Gas adsorption experiments demonstrated that BUT-70A and -70B are able to selectively adsorb C2H2 over CO2 and CH4. At 1 atm and 298 K, BUT-70A uptakes 3.1 mmol g(1) C2H2, which is 3.6 times that of the CO2 uptake and 7.2 times that of the CH4 uptake. Compared with BUT-70A, BUT-70B presents an even higher C2H2 uptake of 3.9 mmol g1 at the same conditions, but slightly lower Ideal Adsorbed Solution Theory C2H2/CO2 and C2H2/CH4 selectivities.
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GB/T 7714 | Guo, Zhen-Ji , Yu, Jiamei , Zhang, Yong-Zheng et al. Water-Stable In(III)-Based Metal-Organic Frameworks with Rod-Shaped Secondary Building Units: Single-Crystal to Single-Crystal Transformation and Selective Sorption of C2H2 over CO2 and CH4 [J]. | INORGANIC CHEMISTRY , 2017 , 56 (4) : 2188-2197 . |
MLA | Guo, Zhen-Ji et al. "Water-Stable In(III)-Based Metal-Organic Frameworks with Rod-Shaped Secondary Building Units: Single-Crystal to Single-Crystal Transformation and Selective Sorption of C2H2 over CO2 and CH4" . | INORGANIC CHEMISTRY 56 . 4 (2017) : 2188-2197 . |
APA | Guo, Zhen-Ji , Yu, Jiamei , Zhang, Yong-Zheng , Zhang, Jian , Chen, Ya , Wu, Yufeng et al. Water-Stable In(III)-Based Metal-Organic Frameworks with Rod-Shaped Secondary Building Units: Single-Crystal to Single-Crystal Transformation and Selective Sorption of C2H2 over CO2 and CH4 . | INORGANIC CHEMISTRY , 2017 , 56 (4) , 2188-2197 . |
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摘要 :
Antibiotics and organic explosives are among the main organic pollutants in wastewater; their detection and removal are quite important but challenging. As a new class of-porous materials, Metal organic frameworks (MOPs) are considered as a promising platform for the sensing and adsorption applications. In this work, guided by a topological design approach, two stable isostructural Zr(IV)-based MOFs, Zr6O4(OH)(8)(H2O)(4)(CTTA)(8/3) (BUT-12, H(3)CTTA = 5'-(4-carboxyphenyl)-2',4',6'-trimethyl-[1,1':3',1 ''-terphenyl]-4,4 ''-dicarboxylic acid) and Zr6O4(OH)(8)(H2O)(4)(TTNA)(8/3) (BUT-13, H(3)TTNA = 6,6',6 ''-(2,4,6-trimethylbenzene-1,3,5-triyl)tris(2-naphthoic acid)) with the the-a topological structure constructed by D-4h 8-connected Zr-6 clusters and D-3h 3-connected linkers were designed and synthesized. The two MOFs are highly porous with the Brunauer-Emmett-Teller surface area of 3387 and 3948 m(2) g(-1), respectively. Particularly, BUT-13 features one-of the most porous water-stable MOFs reported so far. Interestingly, these MOFs, represent excellent fluorescent properties, which can be efficiently quenched by trace amounts of nitrofurazone (NZF) and nitrofurantoin (NFT) antibiotics as well as 2,4,6: trinitrophenol (TNP) and 4-nitrophenol (4-NP) organic explosives in water solution. They are responsive to NZF and TNP at parts per billion (ppb) levels, which are among the best performing luminescent MOP-based sensing materials. Simultaneously, both MOFs also display high adsorption abilities toward these organic molecules. It was demonstrated that the adsorption plays an important role in the preconcentration of analytes, which can further increase the fluorescent quenching efficiency. These results indicate that BUT-12 and -13 are favorable materials for the simultaneous selective detection and removal of specific antibiotics and organic explosives from water, being potentially useful in monitoring water quality and treating wastewater.
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GB/T 7714 | Wang, Bin , Lv, Xiu-Liang , Feng, Dawei et al. Highly Stable Zr(IV)-Based Metal-Organic Frameworks for the Detection and Removal of Antibiotics and Organic Explosives in Water [J]. | JOURNAL OF THE AMERICAN CHEMICAL SOCIETY , 2016 , 138 (19) : 6204-6216 . |
MLA | Wang, Bin et al. "Highly Stable Zr(IV)-Based Metal-Organic Frameworks for the Detection and Removal of Antibiotics and Organic Explosives in Water" . | JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 138 . 19 (2016) : 6204-6216 . |
APA | Wang, Bin , Lv, Xiu-Liang , Feng, Dawei , Xie, Lin-Hua , Zhang, Jian , Li, Ming et al. Highly Stable Zr(IV)-Based Metal-Organic Frameworks for the Detection and Removal of Antibiotics and Organic Explosives in Water . | JOURNAL OF THE AMERICAN CHEMICAL SOCIETY , 2016 , 138 (19) , 6204-6216 . |
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摘要 :
Through ligand modification, we have replaced the central benzene ring of H2TDBA ([1,1': 3', 1.-terphenyl]-4,4.-dicarboxylicacid) with the pyridine structurally related ligand H2PDDA (4,4'-(pyridine-2,6-diyl) dibenzoic acid), which makes the central pyridine ring of H2PDDA more coplanar with two benzene rings on both sides of the ligand. The modification results in a dramatically different linkage configuration, thereby allowing structural changes to the metal-organic frameworks (MOFs). Two 2-D MOFs, [Cu(TDBA)(DMA)2].H2O (BUT-221, DMA = N,N-dimethylacetamide), and [Cu 3 (PDDA) 3 (DMA) 2 (H2O)].5H2O (BUT-223) have been synthesized through reactions of two ditopic carboxylate ligands with Cu(NO3)2.3H2O under solvothermal conditions, and characterized by single-crystal X-ray diffraction, powder X-ray diffraction, thermogravimetric analysis and infrared spectroscopy. Topological analysis shows that BUT-221 is a twofold parallel interpenetrating 44 2-D network with a skl topology, while BUT-223 is a 2-D network with a kgm topology.
关键词 :
crystal structure crystal structure topology topology Metal-organic frameworks Metal-organic frameworks ligand modification ligand modification
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GB/T 7714 | Zhang, Jian , Wang, Bin , Li, Ming et al. Different two-dimensional metal-organic frameworks through ligand modification [J]. | JOURNAL OF COORDINATION CHEMISTRY , 2016 , 69 (14) : 2193-2199 . |
MLA | Zhang, Jian et al. "Different two-dimensional metal-organic frameworks through ligand modification" . | JOURNAL OF COORDINATION CHEMISTRY 69 . 14 (2016) : 2193-2199 . |
APA | Zhang, Jian , Wang, Bin , Li, Ming , Zhao, Min-Jian , Xie, Ya-Bo , Li, Jian-Rong . Different two-dimensional metal-organic frameworks through ligand modification . | JOURNAL OF COORDINATION CHEMISTRY , 2016 , 69 (14) , 2193-2199 . |
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