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Application of GNSS-PPP on Dynamic Deformation Monitoring of Offshore Platforms

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China Ocean Engineering 2024年第2期38卷 352-361页

作者： YU li-na XIONG Kuan GAO Xi-feng li Zhi FAN li-long ZHANG Kai Institute of Ocean Energy and Intelligent Construction Tianjin University of TechnologyTianjin 300384China China Railway Construction Bridge Engineering Bureau Group Co.LTD Tianjin 300300China School of Civil Engineering Tianjin UniversityTianjin 300072China Department of Land Surveying and Geo-Informatics The Hong Kong Polytechnic UniversityHong KongChina State Key Laboratory of Precision Blasting Jianghan UniversityWuhan 430056China

The real-time dynamic deformation monitoring of offshore platforms under environmental excitation is crucial to their safe *** Global Navigation Satellite System-Precise Point Positioning(GNSS-PPP)has been considered for this purpose,its monitoring accuracy is relatively ***,the influence of background noise on the dynamic monitoring accuracy of GNSS-PPP remains ***,it is imperative to further validate the feasibility of GNSS-PPP for deformation monitoring of offshore *** address these concerns,vibration table tests with different amplitudes and frequencies are *** results demonstrate that GNSS-PPP can effectively monitor horizontal vibration displacement as low as±30 mm,which is consistent with ***,the spectral characteristic of background noise in GNSS-PPP is similar to that of GNSS-RTK(Real Time Kinematic).Building on this observation,an improved Complete Ensemble Empirical Mode Decomposition with Adaptive Noise(CEEMDAN)has been proposed to de-noise the data and enhance the dynamic monitoring accuracy of *** monitoring application research is also undertaken,successfully extracting and analyzing the dynamic deformation of an offshore platform structure under environmental excitation using GNSS-PPP monitoring in conjunction with improved CEEMDAN *** comparing the de-noised dynamic deformation trajectories of the offshore platform during different periods,it is observed that the platform exhibits reversible alternating vibration responses under environmental excitation,with more pronounced displacement deformation in the direction of load *** research results confirm the feasibility and potential of GNSS-PPP for dynamic deformation monitoring of offshore platforms.

关键词： GNSS-PPP offshore platform dynamic deformation monitoring improved CEEMDAN de-noising

杜儿坪煤矿72908工作面沿空掘巷支护技术应用

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江西煤炭科技 2025年第1期 93-96页

作者：李明峰山西焦煤西山煤电(集团)有限责任公司安全管理部山西太原030053

针对杜儿坪煤矿72908工作面回风巷进行窄煤柱沿空掘巷围岩稳定性问题,通过理论分析、数值模拟、工程经验等手段进行了研究,得到窄煤柱合理留设宽度为7 m;根据数值模拟结果得到锚杆间排距采用800 mm×800 mm,锚杆长度采用2.5 m;确定了巷... 详细信息

针对杜儿坪煤矿72908工作面回风巷进行窄煤柱沿空掘巷围岩稳定性问题,通过理论分析、数值模拟、工程经验等手段进行了研究,得到窄煤柱合理留设宽度为7 m;根据数值模拟结果得到锚杆间排距采用800 mm×800 mm,锚杆长度采用2.5 m;确定了巷道各项支护参数,并进行了井下试验,得到巷道掘进期间及工作面回采期间变形量可以满足巷道的安全稳定。

关键词：窄煤柱巷道支护变形量

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人民美好生活对西方消费主义的批判与超越

黑河学院学报 2025年第1期16卷 66-69,90页

作者：李海萍上海政法学院马克思主义学院上海201701

美好生活作为人类亘古追求的夙愿,也是新时代下以中国式现代化推动中华民族伟大复兴的价值旨归。从人与自身、人与社会、人与自然等多维视角出发来看,物质生活和精神生活相协调、个体幸福与集体幸福相统一、人与自然和谐共生构成中国式... 详细信息

美好生活作为人类亘古追求的夙愿,也是新时代下以中国式现代化推动中华民族伟大复兴的价值旨归。从人与自身、人与社会、人与自然等多维视角出发来看,物质生活和精神生活相协调、个体幸福与集体幸福相统一、人与自然和谐共生构成中国式现代化美好生活的基本内容。超越西方消费主义掣肘下美好生活陷入人与自身的异化、人与社会的失序、人与自然的失和陷进,从而出现物质需求僭越精神需要、虚假欲求遮蔽真实需要、个人利益凌驾集体利益、生态超载负荷等困境,实现中国式现代化美好生活对西方消费主义的实质性超越。面向未来,应立足于新时代新征程美好生活的现实境况,树立多维多样化的美好生活评价思维,培育良好的消费观念,强化政府对于消费的引导,从而实现美好生活的价值复归。

关键词：美好生活消费主义物质需求精神需要

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篮球运动员蛋白质摄入研究

食品安全导刊 2025年第4期 111-113页

作者：李可心山东师范大学体育学院山东济南250358

篮球是一项高强度的团队运动,涉及大量的跑动、跳跃、投篮和对抗,因此对运动员的体能和力量有较高的要求。蛋白质作为运动员饮食中的关键营养物质,对促进肌肉修复、增强力量和提高运动表现至关重要。本文通过研究篮球运动员蛋白质摄入... 详细信息

篮球是一项高强度的团队运动,涉及大量的跑动、跳跃、投篮和对抗,因此对运动员的体能和力量有较高的要求。蛋白质作为运动员饮食中的关键营养物质,对促进肌肉修复、增强力量和提高运动表现至关重要。本文通过研究篮球运动员蛋白质摄入困境及其对运动表现的影响,探讨如何通过科学的饮食调节提升篮球运动员的运动能力和恢复速度。

关键词：篮球运动员蛋白质饮食

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Interface-rich Au-doped PdBi alloy nanochains as multifunctional oxygen reduction catalysts boost the power density and durability of a direct methanol fuel cell device

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Nano Research 2022年第7期15卷 6036-6044页

作者： Xin li Ke Xin Yao Fengling Zhao Xiaotong Yang Jingwei li Yongfei li Qiang Yuan State-Local Joint Laboratory for Comprehensive Utilization of Biomass Center for R&D of Fine ChemicalsCollege of Chemistry and Chemical EngineeringGuizhou UniversityGuiyang 550025China State Key Laboratory of Coal Mine Disaster Dynamics and Control Chongqing UniversityChongqing 400044China Key Lab of Organic Optoelectronics&Molecular Engineering Tsinghua UniversityBeijing 100084China Multi-scale Porous Materials Center Institute of Advanced Interdisciplinary Studies&School of Chemistry and Chemical EngineeringChongqing UniversityChongqing 400044China

The development of cathode oxygen reduction reaction(ORR)catalysts with high characteristics for practical,direct methanol fuel cells(DMFCs)has continuously increased the attention of *** this work,interface-rich Au-doped PdBi(PdBiAu)branched one-dimensional(1D)alloyed nanochains assembled by sub-6.5 nm particles have been prepared,exhibiting an ORR mass activity(MA)of 6.40 A·mgPd^(−1) and long-term durability of 5,000 cycles in an alkaline *** MA of PdBiAu nanochains is 46 times and 80 times higher than that of commercial Pt/C(0.14 A·mgPt^(−1))and Pd/C(0.08 A·mgPd^(−1)).The MA of binary PdBi nanochains also reaches 5.71 A·mgPd^(−1).Notably,the PdBiAu nanochains exhibit high in-situ carbon monoxide poisoning resistance and high methanol *** actual DMFC device tests,the PdBiAu nanochains enhance power density of 140.1 mW·cm^(−2)(in O_(2))/112.4 mW·cm^(−2)(in air)and durability compared with PdBi nanochains and Pt/*** analysis of the structure–function relationship indicates that the enhanced performance of PdBiAu nanochains is attributed to integrated functions of surficial defect-rich 1D chain structure,improved charge transfer capability,downshift of the d-band center of Pd,as well as the synergistic effect derived from“Pd-Bi”and/or“Pd-Au”dual active sites.

关键词： Au-doped PdBi(PdBiAu)nanochains one-dimensional structure active auxiliary oxygen reduction reaction direct methanol fuel cells

A land use regression model incorporating data on industrial point source pollution

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Journal of Environmental Sciences 2012年第7期24卷 1251-1258页

作者： li Chen Yuming Wang Peiwu li Yaqin Ji Shaofei Kong Zhiyong li Zhipeng Bai College of Urban and Environmental Science Tianjin normal UniversityTianjin 300387China College of Environmental Science and Engineering Nankai UniversityTianjin 300071China State Environmental Protection Key Laboratory of Urban Ambient Air Particulate Matter Pollution and Control Tianjin 300071China Chinese Research Academy of Environmental Sciences Beijing 100012China

Advancing the understanding of the spatial aspects of air pollution in the city regional environment is an area where improved methods can be of great benefit to exposure assessment and policy support. We created land use regression （LUR） models for SO2, NO2 and PMI0 for Tianjin, China. Traffic volumes, road networks, land use data, population density, meteorological conditions, physical conditions and satellite-derived greenness, brightness and wetness were used for predicting SOa, NO2 and PMt0 concentrations. We incorporated data on industrial point sources to improve LUR model performance. In order to consider the impact of different sources, we calculated the PSIndex, LSIndex and area of different land use types （agricultural land, industrial land, commercial land, residential land, green space and water area） within different buffer radii （1 to 20 kin）. This method makes up for the lack of consideration of source impact based on the LUR model. Remote sensing-derived variables were significantly correlated with gaseous pollutant concentrations such as SO2 and NO2. R2 values of the multiple linear regression equations for SO2, NO2 and PM10 were 0.78, 0.89 and 0.84, respectively, and the RMSE values were 0.32, 0.18 and 0.21, respectively. Model predictions at validation monitoring sites went well with predictions generally within 15% of measured values. Compared to the relationship between dependent variables and simple variables （such as traffic variables or meteorological condition variables）, the relationship between dependent variables and integrated variables was more consistent with a linear relationship. Such integration has a discernable influence on both the overall model prediction and health effects assessment on the spatial distribution of air pollution in the city region.

关键词： land use regression air pollution Tianjin point source GIS

A short review of the recent progresses in the study of the cuprate superconductivity

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Chinese Physics B 2021年第10期30卷 14-17页

作者： Tao li Department of Physics Renmin University of ChinaBeijing 100872China

The last 15 years have witnessed important progresses in our understanding of the mechanism of superconductivity in the high-Tc *** is now strong evidence that the strange metal behavior is induced by the quantum critical fluctuation at the pseudogap end point,where the Fermi surface changes its topology from hole-like to ***,experiments show that the quantum critical behavior in the high-Tc cuprates is qualitatively different from that observed in the heavy Fermion systems and the iron-based superconductors,in both of which the quantum critical behavior can be attributed to the quantum phase transition toward a symmetry breaking *** fact that the pseudogap exists as a spectral gap without a corresponding symmetry breaking order,together with the fact that the strange metal behavior occurs as a quantum critical behavior without a corresponding symmetry breaking phase transition,exposes the central difficulty of the field:the lack of a universal low energy effective theory description of the high-Tc phenomenology beyond the Landau *** experiments imply that the dualism between the local moment and the itinerant quasiparticle character of the electron in the high-Tc cuprates may serve as an organizing principle to go beyond the Landau paradigm and may hold the key to the mystery of the pseudogap phenomena and the strange metal *** is the purpose of this review to provide an introduction to these recent progresses in the study of the high-Tc cuprate superconductors and their implications on the construction of a coherent picture for the high-Tc problem.

关键词： high-Tc superconductivity pseudogap phenomena strange metal behavior

In Situ-Constructed li_(x)MoS_(2)with Highly Exposed Interface Boosting High-Loading and Long-life Cathode for All-Solid-State li-S Batteries

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Energy & Environmental Materials 2024年第4期7卷 163-174页

作者： Hao li Rui Wang Jiangping Song Dan liu Hongyang Gao Yimin Chao Haolin Tang A State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Department of Chemistry Chemical Engineeringand Life ScienceWuhan University of TechnologyWuhan 430070China Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Xianhu Hydrogen ValleyFoshan 528200China School of Chemistry University of East AngliaNorwich NR47TJUK

As the persistent concerns regarding sluggish reaction kinetics and insufficient conductivities of sulfur cathodes in all-solid-state li-S batteries(ASSLSBs),numerous carbon additives and solid-state electrolytes(SSEs)have been incorporated into the cathode to facilitate ion/electron pathways around ***,this has resulted in a reduced capacity and decomposition of ***,it is worth exploring neotype sulfur hosts with electronic/ionic conductivity in the ***,we present a hybrid cathode composed of few-layered S/MoS_(2)/C nanosheets(life performance without the need of additional carbon additives in advanced *** multifunctional MoS_(2)/C host exposes the abundant surface for intimate contacting sites,in situ-formed lixMoS_(2)during discharging as mixed ion/electron conductive network improves the S/li2S conversion,and contributes extra capacity for the part of active *** a high active material content(S+MoS_(2)/C)of 60 wt%in the S/MoS_(2)/C/li_(6)PS_(5)Cl cathode composite(the carbon content is only~3.97 wt%),the S/MoS_(2)/C electrode delivers excellent electrochemical performance,with a high reversible discharge capacity of 980.3 mAh g^(-1)(588.2 mAh g^(-1)based on the whole cathode weight)after 100 cycles at 100 mA g^(-1).The stable cycling performance is observed over 3500 cycles with a Coulombic efficiency of 98.5%at 600 mA g^(-1),while a high areal capacity of 10.4 mAh cm^(-2)is achieved with active material loading of 12.8 mg cm^(-2).

关键词： all-solid-state lithium-sulfur batteries conversion/intercalation high-loading and long-life low carbon content mixed ionic/electronic conductivities

Comparison of using polyurethane foam passive samplers and tree bark samples from Western China to determine atmospheric organochlorine pesticide

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Journal of Environmental Sciences 2016年第3期28卷 90-98页

作者： Qiuxu li Yao Lu Jun Jin Guangyao li Peng li Chang He Ying Wang College of life and Environmental Sciences Minzu University of ChinaBeijing 100081China Engineering Research Center for Food Environment and Health Beijing 100081China

Polyurethane foam（PUF）passive samplers were deployed and tree bark samples were collected at 15 sites across western China in 2013,and the organochlorine pesticide（OCP）concentrations in the samples were *** and its degradation products（collectively called DDTs）,hexachlorocyclohexanes（HCHs）,and hexachlorobenzene（HCB）were the dominant OCPs in the PUF samples and tree bark *** mean DDTs,HCHs and HCB concentrations were 33,22 and 18 ng/sample in the PUF samples,and 428,74,and 43 ng/（g lipid weight（lw））in the tree bark,*** OCP concentrations in the air,calculated using PUF–air and tree-bark–air partitioning models,were of the same order of *** sample types showed that relatively fresh inputs of DDT and HCHs to the environment have occurred in western ***,PUF passive samplers were compared with the use of tree bark samples as passive *** OCP compositions in the PUF and tree bark samples were *** the relatively stable OCPs（such as HCB,β-HCH and p,p′-dichlorodiphenyldichloro-ethylene（DDE））were consistent in the PUF and tree bark samples.

关键词： Organochlorine pesticides Polyurethane foam Tree bark Passive sampler Western China