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Laser Light Scattering Study on Aggregation of Cellulose Diacetate in Acetone

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Laser Light Scattering Study on Aggregation of Cellulose Dia...

Physically Constrained Adaptive Deep Learning for Ocean Vertical-Mixing Parameterization

作者： Ding-hai xie Xu-hua Li xi-ling fang Chun-feng Ma Technology Center China Tobacco Guangdong Industrial Co. Ltd. Faculty of Materials Science and Engineering South China University of Technology

We have investigated the properties of cellulose diacetate in solution by using laser light scattering. The cellulose diacetate molecules can form micelles and micellar clusters in acetone besides the individual chains. As the concentration increases, the average hydrodynamic radius R linearly increases, whereas the ratio of gyration radius to hydrodynamic radius R/R linearly decreases. It indicates that the micelles associate and form micellar clusters due to the intermolecular interactions.

关键词： Cellulose diacetate Laser light scattering Multi-aggregation form structure

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Advances in Atmospheric Sciences 2025年第1期42卷 165-177页

作者： Junjie fang xiaojie LI Jin LI Zhanao HUANG Yongqiang YU xiaomeng HUANG xi WU Chengdu University of Information Technology Chengdu 610225China Institute of Atmospheric Physics Chinese Academy of SciencesBeijing 100029China Tsinghua University Beijing 100084China

Existing traditional ocean vertical-mixing schemes are empirically developed without a thorough understanding of the physical processes involved,resulting in a discrepancy between the parameterization and forecast *** uncertainty in ocean-mixing parameterization is primarily responsible for the bias in ocean *** from deep-learning technology,we design the Adaptive Fully Connected Module with an Inception module as the baseline to minimize *** adaptively extracts the best features through fully connected layers with different widths,and better learns the nonlinear relationship between input variables and parameterization ***,to obtain more accurate results,we impose KPP(K-Profile Parameterization)and PP(Pacanowski–Philander)schemes as physical constraints to make the network parameterization process follow the basic physical laws more *** model data are calculated with human experience,lacking some unknown physical processes,which may differ from the actual data,we use a decade-long time record of hydrological and turbulence observations in the tropical Pacific Ocean as training *** physical constraints and a nonlinear activation function,our method catches its nonlinear change and better adapts to the oceanmixing parameterization *** use of physical constraints can improve the final results.

关键词： deep learning vertical-mixing parameterization ocean sciences adaptive network

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Machine learning-based grayscale analyses for lithofacies identification of the Shahejie formation, Bohai Bay Basin, China

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Petroleum Science 2025年第1期22卷 42-54页

作者： Yu-Fan Wang Shang Xu fang Hao Hui-Min Liu Qin-Hong Hu Ke-Lai xi Dong Yang National Key Laboratory of Deep Oil and Gas China University of Petroleum (East China) Shengli Oilfield Branch Company SINOPEC

It is of great significance to accurately and rapidly identify shale lithofacies in relation to the evaluation and prediction of sweet spots for shale oil and gas reservoirs. To address the problem of low resolution in logging curves, this study establishes a grayscale-phase model based on high-resolution grayscale curves using clustering analysis algorithms for shale lithofacies identification, working with the Shahejie Formation, Bohai Bay Basin, China. The grayscale phase is defined as the sum of absolute grayscale and relative amplitude as well as their features. The absolute grayscale is the absolute magnitude of the gray values and is utilized for evaluating the material composition(mineral composition + total organic carbon) of shale, while the relative amplitude is the difference between adjacent gray values and is used to identify the shale structure type. The research results show that the grayscale phase model can identify shale lithofacies well, and the accuracy and applicability of this model were verified by the fitting relationship between absolute grayscale and shale mineral composition, as well as corresponding relationships between relative amplitudes and laminae development in shales. Four lithofacies are identified in the target layer of the study area: massive mixed shale, laminated mixed shale, massive calcareous shale and laminated calcareous shale. This method can not only effectively characterize the material composition of shale, but also numerically characterize the development degree of shale laminae, and solve the problem that difficult to identify millimeter-scale laminae based on logging curves, which can provide technical support for shale lithofacies identification, sweet spot evaluation and prediction of complex continental lacustrine basins.

关键词： Shale Machine learning Absolute grayscale Relative amplitude Grayscale phase model Lithofacies identification

Macrophage polarization in cardiac transplantation:Insights into immune modulation and therapeutic approaches

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BIOCELL 2025年第1期49卷 61-78页

作者： JINGWEI JIANG BO JIA CHUAN WANG CHEN fang YUGUI LI GUOxiNG ling BAOSHI ZHENG CHENG LUO Department of Cardiovascular Surgery The First Affiliated Hospital of Guangxi Medical UniversityNanning530021China The First Clinical Medical College of Guangxi Medical University Nanning530021China Department of Cardiovascular Surgery Beijing Anzhen Hospital of Capital Medical UniversityBeijing100029China

The role and regulatory mechanisms of macrophage polarization in cardiac transplantation have gained significant *** can polarize into either the M1(pro-inflammatory)or M2(anti-inflammatory)phenotype in response to environmental cues.M1 macrophages facilitate transplant rejection by releasing inflammatory mediators and activating T cells,whereas M2 macrophages support graft survival by secreting antiinflammatory factors and promoting tissue *** quality control regulation plays a crucial role in macrophage polarization,which may influence graft survival and immune *** review provides an overview of the current understanding of mitochondrial quality control-regulated macrophage polarization in cardiac transplantation,its effects on graft outcomes,and potential therapeutic strategies to modulate this process to enhance transplant success *** review was conducted by systematically analyzing recent studies and integrating findings from key research articles to synthesize a comprehensive understanding of this emerging field.

关键词： Cardiac transplantation Mitochondrial quality control Macrophage polarization immune tolerance transplant rejection

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铁路机车乘务员作业能力调查

现代预防医学 2009年第19期36卷 3637-3639页

作者：凌喜凤杨蓉龙云芳成都铁路局疾病预防控制中心四川大学华西公共卫生学院

[目的]探讨铁路机车乘务员所接触的有害因素对其作业能力的影响。[方法]测定观察组和对照组作业环境的气象条件、噪声、振动、CO、细菌总数和照度;测试机车乘务员和对照组的剂量作业、视觉运动反应时、目标追踪、闪光融合临界频率等作... 详细信息

[目的]探讨铁路机车乘务员所接触的有害因素对其作业能力的影响。[方法]测定观察组和对照组作业环境的气象条件、噪声、振动、CO、细菌总数和照度;测试机车乘务员和对照组的剂量作业、视觉运动反应时、目标追踪、闪光融合临界频率等作业能力指标。[结果]观察组作业环境稳态噪声强度超过相关标准。观察组的视觉运动反应时错误率低于对照组(P﹤0.05);按工龄分层后,剂量作业错误率、AYP和平均反应时有统计学意义(P﹤0.05)。观察组按工龄分层后,各指标随工龄的增加而呈现不同程度的衰退。[结论]机车乘务员工龄增加,作业能力下降可能与噪声、振动和其他有害因素联合作用有关。

关键词：铁路机车乘务员有害因素作业能力

Comprehensive Chlorine Suppression:Advances in Materials and System Technologies for Direct Seawater Electrolysis

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Nano-Micro Letters 2025年第5期17卷 297-325页

作者： Cenkai Zhao Zheyuan Ding Kunye Zhang Ziting Du Haiqiu fang ling Chen Hao Jiang Min Wang Mingbo Wu State Key Laboratory of Heavy Oil Processing College of New EnergyChina University of Petroleum(East China)Qingdao 266580People’s Republic of China Beijing National Laboratory for Molecular Sciences New Cornerstone Science LaboratoryCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871People’s Republic of China Key Laboratory for Ultrafine Materials of Ministry of Education School of Materials Science and EngineeringEast China University of Science and TechnologyShanghai 200237People’s Republic of China

Seawater electrolysis offers a promising pathway to generate green hydrogen,which is crucial for the net-zero emission *** seawater electrolysis is severely limited by high energy demands and system complexity,while the direct seawater electrolysis bypasses pre-treatment,offering a simpler and more cost-effective ***,the chlorine evolution reaction and impurities in the seawater lead to severe corrosion and hinder electrolysis’s ***,we review recent advances in the rational design of chlorine-suppressive catalysts and integrated electrolysis systems architectures for chloride-induced corrosion,with simultaneous enhancement of Faradaic efficiency and reduction of electrolysis’s ***,promising directions are proposed for durable and efficient seawater electrolysis *** review provides perspectives for seawater electrolysis toward sustainable energy conversion and environmental protection.

关键词： Direct seawater electrolysis Oxygen evolution reaction Hydrogen evolution reaction Chlorine suppression Seawater electrolysis system

Compositions and Distributions of Secondary Organic Aerosols and Their Tracers over the Pearl River Estuary Region Influenced by Continental and Marine Air Masses

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ADVANCES IN ATMOSPHERIC SCIENCES 2025年第4期42卷 682-696页

作者： ling, Zhenhao Huang, Junlin Wu, Liqing Tham, Yee Jun fang, Guizhen Wu, Bing Ming, Lili Wang, Xuemei Ding, xiang Sun Yat Sen Univ Sch Atmospher Sci Minist Educ Key Lab Trop Atmosphere Ocean Syst Zhuhai Peoples R China Southern Marine Sci & Engn Guangdong Lab Zhuhai Zhuhai Peoples R China Guangdong Ocean Univ Coll Ocean & Meteorol Zhanjiang Peoples R China Sun Yat Sen Univ Sch Marine Sci Zhuhai Peoples R China Tech Ctr Gongbei Customs Dist China Zhuhai Peoples R China Jinan Univ Coll Environm & Climate Guangdong Hongkong Macau Joint Lab Collaborat Inno Guangzhou Peoples R China Chinese Acad Sci Guangzhou Inst Geochem Guangzhou Peoples R China

The compositions and distributions of monoterpenes, isoprene, aromatics and sesquiterpene SOA tracers (SOAM, SOAI, SOAA and SOAS, respectively) at an island site (Da Wan Shan Island, DWS) were investigated in the context of the influence of continental and marine air masses over the Pearl River Estuary (PRE) region in winter 2021. The sum concentration of SOA tracers was 6.2-132.8 ng m-3, with SOAM and SOAI as the main components in both continental (scenarios A1 and A2) and marine air masses (scenario A3), as well as their combination (scenario A4). The highest and lowest levels of SOAM were observed in A1 and A3, respectively, which were mainly related to the variations in meteorological conditions, precursor concentrations, and the degree of photochemical processes. Higher MBTCA/HGA (3-methyl-1,2,3-butanetricarboxylic acid/3-hydroxyglutaric acid) ratios suggested a less significant contribution from alpha-pinene to SOAM. The variations of SOAI in the different scenarios were associated with differences in relative humidity, particle acidity, and isoprene/NOx ratios. The respective highest and lowest concentrations of aromatics SOA tracers in A1 and A3 revealed the influence of anthropogenic precursors from upwind continental areas, which was confirmed by the correlation among biogenic and anthropogenic precursors. The results of the tracer-based-method suggested dominant contributions of SOAs from aromatics and monoterpenes, with the highest concentrations in A1. A WRF-Chem simulation revealed that the SOAs from the above precursors only contributed 12%-25% to the total SOA at DWS, while the spatial distributions of SOAs further highlighted that the abundance of SOAs over the PRE region in winter is highly associated with air masses transported from upwind continental areas.

关键词： secondary organic aerosols tracers continental and marine air masses Pearl River Estuary region

某烟气脱硝催化剂生产企业职业病危害控制效果评价

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职业卫生与病伤 2009年第3期24卷 131-133页

作者：凌喜凤杨蓉成都铁路局疾病预防控制中心四川成都610081

目的明确建设项目产生的职业病危害因素,分析其危害程度及对劳动者健康的影响,评价职业病危害防护措施及其效果,提出职业病控制措施的建议。方法采用职业卫生现场调查、职业卫生检测、职业健康检查和检查表法进行分析评价。结果该项目... 详细信息

目的明确建设项目产生的职业病危害因素,分析其危害程度及对劳动者健康的影响,评价职业病危害防护措施及其效果,提出职业病控制措施的建议。方法采用职业卫生现场调查、职业卫生检测、职业健康检查和检查表法进行分析评价。结果该项目在生产过程中存在的主要职业病危害因素种类有五氧化二钒、氨、乙二醇、三氧化钨、草酸、环氧乙烷、乙醇胺、甲烷、硫化氢、氮氧化物、一氧化碳、二氧化锰、二氧化钛粉尘、玻璃纤维粉尘、电焊烟尘、其它粉尘、噪声、高温、紫外线。经分析该项目属于职业病危害一般的建设项目。结论该项目采取的职业病防护措施基本有效,建设单位在按照建议内容进行改进后,其职业病危害控制效果基本上能够达到国家相关卫生标准的要求。

关键词：建设项目职业病危害因素控制效果评价

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某粉末冶金建设项目职业病危害预评价

职业卫生与病伤 2008年第4期23卷 193-195页

作者：杨蓉凌喜凤成都铁路局疾病预防控制中心四川成都610081

目的识别、分析和评价建设项目可能产生及存在的职业病危害因素,分析其危害程度及对劳动者健康的影响,对拟采取的职业病危害防护技术措施进行分析与评价,确定职业病危害的类别,提出职业病危害的关键控制点。方法采用检查表法、类比法进... 详细信息

目的识别、分析和评价建设项目可能产生及存在的职业病危害因素,分析其危害程度及对劳动者健康的影响,对拟采取的职业病危害防护技术措施进行分析与评价,确定职业病危害的类别,提出职业病危害的关键控制点。方法采用检查表法、类比法进行综合分析评价。结果该项目可能产生和存在苯、甲苯、二甲苯、钨、钴、金属镍、一氧化碳、二氧化氮、粉尘、噪声等职业病危害因素。该项目属于职业病危害一般的建设项目。结论该建设项目须将各项职业病防护设施和措施落实到位,完善职业卫生管理。从职业卫生角度分析,该建设项目基本可行。

关键词：建设项目职业病危害预评价

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