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Fate of organophosphate esters from the Northwestern Pacific to the Southern Ocean:Occurrence,distribution,and fugacity model simulation

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Journal of Environmental Sciences 2024年第3期137卷 347-357页

作者： Tengda Shi Ruijing Li Jie Fu Chao hou Hui Gao Guanjie Cheng Haibo Zhang Shuaichen Jin Liang Kong Guangshui Na College of Marine Technology and Environment Dalian Ocean UniversityDalian 116023China Laboratory for coastal marine eco-environment process and carbon sink of Hainan province/Yazhou Bay Innovation Institute Hainan Tropical Ocean UniversitySanya 572022China National Marine Environmental Monitoring Center Dalian 116023China College of Marine Ecology and Environment Shanghai Ocean UniversityShanghai 201306China NCS Testing Technology Co. Ltd.Beijing 10081China

Eleven organophosphate esters(OPEs)in the air and seawater were investigated from the northwestern Pacific Ocean to the Southern Ocean during the 2018 Chinese 34th Antarctic Scientific Expedition.The concentration of total OPEs ranged from 164.82 to 3501.79 pg/m~3in air and from 4.54 to 70.09 ng/L in seawater.Two halogenated OPEs,tri(chloropropyl)phosphate(TCPP)and tri(2-chloroethyl)phosphate(TCEP),were generally more abundant than the non-halogenated OPEs.A levelⅢfugacity model was developed to simulate the transfer and fate of seven OPEs in the air and seawater regions of the central Ross Sea.The model results indicate that OPEs are transferred from the air to the seawater in the central Ross Sea in summer,during which the Ross Sea acts as a final OPE sink.Dry and wet deposition dominated the processes involving OPE transfer to seawater.The OPE degradation process was also found to be more pervasive in the atmosphere than in the seawater region.These findings highlights the importance of long-range transport of OPEs and their air–seawater interface behavior in the Antarctic.

关键词： Organophosphate esters(OPEs) long-range transport Fugacity model Antarctic Fate

Ten- year follow- up investigation of stroke risk in systemic lupus erythematosus

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Stroke & Vascular Neurology 2024年第1期9卷 1-7页

作者： Jin-An Huang Ching-Heng Lin Ming-Ju Wu Yi-Hsing Chen Kuo-Cheng Chang Chung-Wei hou Division of Neurology Neurological InstituteTaichung Veterans General HospitalTaichungTaiwan Department of Health Business Administration Hungkuang UniversityTaichungTaiwan Department of Medical Research Taichung Veterans General HospitalTaichungTaiwan Division of Nephrology Department of Internal MedicineTaichung Veterans General HospitalTaichungTaiwan School of Medicine Chung Shan Medical UniversityTaichungTaiwan College of Medicine National Chung Hsing UniversityTaichungTaiwan Division of Allergy Immunology and RheumatologyDepartment of Internal MedicineTaichung Veterans General HospitalTaichungTaiwan School of Medicine National Yang-Ming Chiao Tung UniversityTaichungTaiwan

Background and purpose To analyse the long-term risk of ischaemic stroke and the clinical effects of antithrombotics on the risk of haemorrhagic stroke in patients with systemic lupus erythematosus(SLE).Methods A retrospective cohort study was conducted using a population-based database taken from Taiwan National Health Insurance Research Database.Patients with SLE between 2000 and 2008 were registered and matched with two controls by the index date,age,gender and Charlson Comorbidity Index(CCI).These subjects were followed until either stroke event or 31 December 2013.Adjusted HRs(aHRs)for strokes were estimated with Cox regression models,and the cumulative incidence of ischaemic stroke was analysed by log-rank test and Kaplan-Meier survival analysis.Results In total,8310 patients with SLE and 16620 patients without SLE were included.In general,patients with SLE had higher rates of ischaemic stroke(5.4%vs 3.3%)and haemorrhagic stroke(1.5%vs 0.6%)than in controls.In multivariate analysis adjusted to age,gender,CCI,urbanisation level and antithrombotics uses,aHRs of all strokes,ischaemic stroke and haemorrhagic stroke were 1.73(95%CI:1.54 to 1.94),1.65(95%CI:1.45 to 1.87)and 2.24(95%CI:1.71 to 2.95),respectively,in patients with SLE.Patients with SLE were significantly more likely to suffer ischaemic stroke than patients without SLE,even 10 years after SLE diagnosis(6.12%vs 3.50%,phould be carefully administered to prevent cardiovascular events in patients with SLE due to the risk of haemorrhagic stroke.

关键词： erythematosus diagnosis likely

职业认同对师范院校在校生从教意愿的影响研究

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教育经济评论 2022年第5期7卷 100-114页

作者：何赵颖侯龙龙潘艳萍朱涵北京师范大学教育学部北京市清河中学深圳市福田区竹香学校

随着基础教育由规模扩张走向内涵式发展,教师队伍素质的提升刻不容缓。高等师范院校作为高素质师范人才培养的摇篮,提升其在校生从教意愿是促进我国教育事业高质量发展的重要抓手。本文从角色价值观、职业行为倾向和职业价值观等视角下... 详细信息

随着基础教育由规模扩张走向内涵式发展,教师队伍素质的提升刻不容缓。高等师范院校作为高素质师范人才培养的摇篮,提升其在校生从教意愿是促进我国教育事业高质量发展的重要抓手。本文从角色价值观、职业行为倾向和职业价值观等视角下的六个维度进行职业认同界定,通过对在校生问卷调查和对公费师范生进行访谈,分析了职业认同对师范院校在校生从教意愿的影响。研究发现,职业认同对在校生从教意愿的影响在整体上是显著的。其中,在校生的性格匹配程度、教学工作态度和敬业态度对师范院校在校生从教意愿具有显著正向影响。师范生和非师范生在性格匹配度以及敬业态度上类似,在受尊敬程度、社会作用程度、教学工作态度和鼓励他人从教态度上有所不同。在此基础上,本研究从个人职业认同、家庭、学校、国家政策等不同层面提出政策建议,旨在提高师范院校在校生的职业认同,进而提升其从教意愿,为国家储备更多优秀从教人才。

关键词：职业认同从教意愿师范院校师范生非师范生

A comparative study of data-driven battery capacity estimation based on partial charging curves

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Journal of Energy Chemistry 2024年第1期88卷 409-420,I0010页

作者： Chuanping Lin Jun Xu Delong Jiang Jiayang hou Ying Liang Xianggong Zhang Enhu Li Xuesong Mei State Key Laboratory for Manufacturing Systems Engineering Xi’an Jiaotong UniversityXi’an 710049ShaanxiChina Shaanxi Key Laboratory of Intelligent Robots School of Mechanical EngineeringXi’an Jiaotong UniversityXi’an 710049ShaanxiChina Department of Electrical Engineering and Automation Luoyang Institute of Science and TechnologyLuoyang 471023HenanChina Wuhan Institute of Marine Electric Propulsion China State Shipbuilding Corporation LimitedWuhan 430064HubeiChina Gresgying Digital Technology Ltd. Xi’an 710086ShaanxiChina

With its generality and practicality, the combination of partial charging curves and machine learning(ML) for battery capacity estimation has attracted widespread attention. However, a clear classification,fair comparison, and performance rationalization of these methods are lacking, due to the scattered existing studies. To address these issues, we develop 20 capacity estimation methods from three perspectives:charging sequence construction, input forms, and ML models. 22,582 charging curves are generated from 44 cells with different battery chemistry and operating conditions to validate the performance. Through comprehensive and unbiased comparison, the long short-term memory(LSTM) based neural network exhibits the best accuracy and robustness. Across all 6503 tested samples, the mean absolute percentage error(MAPE) for capacity estimation using LSTM is 0.61%, with a maximum error of only 3.94%. Even with the addition of 3 m V voltage noise or the extension of sampling intervals to 60 s, the average MAPE remains below 2%. Furthermore, the charging sequences are provided with physical explanations related to battery degradation to enhance confidence in their application. Recommendations for using other competitive methods are also presented. This work provides valuable insights and guidance for estimating battery capacity based on partial charging curves.

关键词： Lithium-ion battery Partial charging curves Capacity estimation Data-driven Sampling frequency

不同类型高校的内部效率——从范围经济的角度

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清华大学教育研究 2006年第2期27卷 15-22页

作者：侯龙龙清华大学公共管理学院北京100084

范围经济是刻画高等教育内部效率的一个重要工具。本文运用鲍莫尔等人提供的多产出组织分析框架,对教育部直属高校的样本数据进行了实证分析。发现在考虑不同高校类型的情况下,在均值产出的各个水平上,不仅不同类型高校范围经济的变化... 详细信息

范围经济是刻画高等教育内部效率的一个重要工具。本文运用鲍莫尔等人提供的多产出组织分析框架,对教育部直属高校的样本数据进行了实证分析。发现在考虑不同高校类型的情况下,在均值产出的各个水平上,不仅不同类型高校范围经济的变化各不相同,而且同总体样本比较也存在差异。说明在从范围经济的角度考察高等学校的内部效率时,高校的类型是需要考虑的重要因素之一。

关键词：范围经济高校类型内部效率实证分析教育经济学

∼2.5 nm pores in carbon-based cathode promise better zinc-iodine batteries

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Chinese Chemical Letters 2024年第5期35卷 471-476页

作者： Yajun hou Chuanzheng Zhu Qiang Wang Xiaomeng Zhao Kun Luo Zongshuai Gong Zhihao Yuan School of Materials Science and Engineering Tianjin Key Laboratory of Photoelectric Materials&DevicesTianjin University of TechnologyTianjin 300384China

The relationship mechanism between the material pore structures and cathodic iodine chemistry plays a vital role in efficient Zn-I_(2) batteries,but is unclear,retarding further advances.This work innovatively indicates a great contribution of∼2.5nm pore structure of nanocarbons to efficient iodine adsorption,rapid I^(−)↔I_(2) conversion,and polyiodide inhibition,via scrupulously designing catalysts with controllable pore sizes systematically.The I_(2)-loading within the designed nitrogen-doped nanocarbons can reach up to as high as 60.8 wt%.The batteries based on the cathode deliver impressive performances with a large capacity of 178.8 mAh/g and long-term cycling stability more than 4000 h at 5.0 C.Notably,these is no polyiodide such as I_(3)−and I_(5)−detected during the charge-discharge processes from comprehensive electrochemical cyclic voltammetry,X-ray photoelectron spectroscopy,and Raman technique.This work provides a novel knowledge-guided concept for rational pore design,promising better Zn-I_(2) batteries,which is also hoped to benefit other advanced energy technologies,such as Li-S,Li-ion,and Al-I_(2) batteries.

关键词： Zinc-iodine batteries Structure-performance relationship Iodine conversion chemistry Cathode materials Porous carbon

采用新型MPC提高储能PCS虚拟同步机控制稳定性研究

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国外电子测量技术 2022年第7期41卷 82-88页

作者：侯龙王玉爽杨沛豪河南农业职业学院信息工程学院郑州451450 西安热工研究院有限公司西安710054

为了提升采用电压型换流器(PCS)的储能系统对电网频率支撑能力,采用模仿同步发电机特性的虚拟同步机(virtual synchronous generation, VSG)控制,实现储能系统对电网的虚拟惯性、阻尼支撑。针对传统VSG控制在功率调节过程中出现的频率... 详细信息

为了提升采用电压型换流器(PCS)的储能系统对电网频率支撑能力,采用模仿同步发电机特性的虚拟同步机(virtual synchronous generation, VSG)控制,实现储能系统对电网的虚拟惯性、阻尼支撑。针对传统VSG控制在功率调节过程中出现的频率偏差、功率振荡问题,提出一种采用功率模型预测控制(model predictive control, MPC)提高VSG稳定性的方法,采用MPC不断修正VSG功率参考值。为了加快MPC功率响应速度,提出两步MPC频率偏差功率约束函数,实现储能PCS稳态控制,为了验证采用MPC及VSG协调控制的储能电压型PCS控制系统稳定性,构建储能系统并网运行小信号模型。将上述控制策略通过MATLAB/Simulink仿真,验证方案可以有效提高储能PCS虚拟同步机控制系统稳定性。

关键词：储能系统电压型换流器虚拟同步机功率模型预测控制频率偏差功率约束函数小信号模型

Multi-scenario Simulation and Spatial-temporal Analysis of LUCC in China's Coastal Zone Based on Coupled SD-FLUS Model

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Chinese Geographical Science 2024年第4期34卷 579-598页

作者： hou Xiyong SONG Baiyuan ZHANG Xueying WANG Xiaoli LI Dong Yantai Institute of Coastal Zone Research Chinese Academy of SciencesYantai 264003China Shandong Key Laboratory of Coastal Environmental Processes Yantai 264003China CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation Yantai Institute of Coastal Zone ResearchChinese Academy of SciencesYantai 264003China Shanghai Fuxiong Environmental Technology Corporation Shanghai 200433China

Increased human activities in China's coastal zone have resulted in the depletion of ecological land resources.Thus,conducting current and future multi-scenario simulation research on land use and land cover change(LUCC)is crucial for guiding the healthy and sustainable development of coastal zones.System dynamic(SD)-future land use simulation(FLUS)model,a coupled simulation model,was developed to analyze land use dynamics in China's coastal zone.This model encompasses five scenarios,namely,SSP1-RCP2.6(A),SSP2-RCP4.5(B),SSP3-RCP4.5(C),SSP4-RCP4.5(D),and SSP5-RCP8.5(E).The SD model simulates land use demand on an annual basis up to the year 2100.Subsequently,the FLUS model determines the spatial distribution of land use for the near term(2035),medium term(2050),and long term(2100).Results reveal a slowing trend in land use changes in China's coastal zone from 2000–2020.Among these changes,the expansion rate of construction land was the highest and exhibited an annual decrease.By 2100,land use predictions exhibit high accuracy,and notable differences are observed in trends across scenarios.In summary,the expansion of production,living,and ecological spaces toward the sea remains prominent.Scenario A emphasizes reduced land resource dependence,benefiting ecological land protection.Scenario B witnesses an intensified expansion of artificial wetlands.Scenario C sees substantial land needs for living and production,while Scenario D shows coastal forest and grassland shrinkage.Lastly,in Scenario E,the conflict between humans and land intensifies.This study presents pertinent recommendations for the future development,utilization,and management of coastal areas in China.The research contributes valuable scientific support for informed,long-term strategic decision making within coastal regions.

关键词： land use and land cover change(LUCC) multi-scenario simulation system dynamic-future land use simulation(SD-FLUS)model SSP-RCP scenarios model coupling China's coastal zone

Anisotropic time-dependent behaviors of shale under direct shearing and associated empirical creep models

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Journal of Rock Mechanics and Geotechnical Engineering 2024年第4期16卷 1262-1279页

作者： Yachen Xie Michael Z.hou Hejuan Liu Cunbao Li Shenzhen Key Laboratory of Deep Engineering Sciences and Green Energy Shenzhen UniversityShenzhen518060China Institute of Subsurface Energy Systems Clausthal University of TechnologyClausthal-Zellerfeld38678Germany State Key Laboratory of Geomechanics and Geotechnical Engineering Institute of Rock and Soil MechanicsChinese Academy of SciencesWuhan430071China

Understanding the anisotropic creep behaviors of shale under direct shearing is a challenging issue.In this context,we conducted shear-creep and steady-creep tests on shale with five bedding orientations (i.e.0°,30°,45°,60°,and 90°),under multiple levels of direct shearing for the first time.The results show that the anisotropic creep of shale exhibits a significant stress-dependent behavior.Under a low shear stress,the creep compliance of shale increases linearly with the logarithm of time at all bedding orientations,and the increase depends on the bedding orientation and creep time.Under high shear stress conditions,the creep compliance of shale is minimal when the bedding orientation is 0°,and the steady-creep rate of shale increases significantly with increasing bedding orientations of 30°,45°,60°,and 90°.The stress-strain values corresponding to the inception of the accelerated creep stage show an increasing and then decreasing trend with the bedding orientation.A semilogarithmic model that could reflect the stress dependence of the steady-creep rate while considering the hardening and damage process is proposed.The model minimizes the deviation of the calculated steady-state creep rate from the observed value and reveals the behavior of the bedding orientation's influence on the steady-creep rate.The applicability of the five classical empirical creep models is quantitatively evaluated.It shows that the logarithmic model can well explain the experimental creep strain and creep rate,and it can accurately predict long-term shear creep deformation.Based on an improved logarithmic model,the variations in creep parameters with shear stress and bedding orientations are discussed.With abovementioned findings,a mathematical method for constructing an anisotropic shear creep model of shale is proposed,which can characterize the nonlinear dependence of the anisotropic shear creep behavior of shale on the bedding orientation.

关键词： Rock anisotropy Direct shear creep Creep compliance Steady-creep rate Empirical model Creep constitutive model