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真空罩盒气泡检漏法在常压储罐泄漏检测中的应用

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化工装备技术 2024年第3期45卷 20-24页

作者：刘金生张蔚张连杰天科泰瑞检测(天津)有限公司天津市300456

简要介绍了储罐常用泄漏检测技术的技术特点,和真空罩盒气泡检漏法的原理特点,分析了检测灵敏度的主要影响因素及检测方法优势。对某常压储罐泄漏事故现场进行勘察,结合储罐的基本情况和泄漏失效形式,制定了宏观检查、焊缝磁粉检测、真... 详细信息

简要介绍了储罐常用泄漏检测技术的技术特点,和真空罩盒气泡检漏法的原理特点,分析了检测灵敏度的主要影响因素及检测方法优势。对某常压储罐泄漏事故现场进行勘察,结合储罐的基本情况和泄漏失效形式,制定了宏观检查、焊缝磁粉检测、真空罩盒气泡检漏法检测相结合的无损检测方案,确定储罐底板上表面机械损伤部位发生泄漏。储罐泄漏检测方案的制定方法及真空罩盒气泡检漏法的参数选取方法可以为储罐现场的泄漏检测提供理论指导,对降低企业运行维护成本和保护环境具有重要意义。

关键词：储罐泄漏检测真空罩盒气泡检漏法

苯基取代苯并二噻吩二酮构建新型聚合物及其光伏性能研究

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化学学报 2024年第3期82卷 257-264页

作者：邓燧楠刘海珍张连杰罗文君罗妹张泽升梁嘉豪王新康陈军武华南理工大学高分子光电材料与器件研究所发光材料与器件国家重点实验室广州510640

随着材料和器件的不断发展,有机光伏(OPV)的器件效率不断提升,但制备仍存在较多额外加工工艺,不利于其大规模生产.如何合理调控活性层材料的溶解性、结晶性和两相形貌来简化器件制备工艺,实现高性能的as-cast器件将十分具有科学意义.本... 详细信息

随着材料和器件的不断发展,有机光伏(OPV)的器件效率不断提升,但制备仍存在较多额外加工工艺,不利于其大规模生产.如何合理调控活性层材料的溶解性、结晶性和两相形貌来简化器件制备工艺,实现高性能的as-cast器件将十分具有科学意义.本工作通过设计合成苯基取代的苯并二噻吩二酮单元(二维BDD)作为共聚单元,制备了三种新型聚合物材料.当二维BDD单元摩尔分数为10%时, FBDT-m10能实现良好的聚集性能和加工性能,与Y6-BO共混制备的as-cast器件就可以得到良好的活性层形貌,最终实现了71.14%的填充因子及16.06%的器件效率.

关键词：芳香取代苯并二噻吩二酮聚合物给体有机太阳电池

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生物炭对牛粪-酒糟-园林废弃物联合蚯蚓堆肥进程及重金属钝化的影响

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农业环境科学学报 2024年第6期43卷 1400-1410页

作者：罗梦琴龚崇艳方婷江俊贤唐志康张莲洁蔡琳琳龚小强西南科技大学生命科学与工程学院四川绵阳621000 绵阳职业技术学院旅游与管理学院四川绵阳621000

为探究生物炭对蚯蚓堆肥过程理化特性、微生物群落结构组成和重金属形态变化的影响,以牛粪、酒糟和园林废弃物为原料,分别添加5%(质量比)的竹炭、木屑生物炭和玉米芯生物炭,采用赤子爱胜蚯蚓(Eisenia fetida)开展为期60 d的堆肥试验。... 详细信息

为探究生物炭对蚯蚓堆肥过程理化特性、微生物群落结构组成和重金属形态变化的影响,以牛粪、酒糟和园林废弃物为原料,分别添加5%(质量比)的竹炭、木屑生物炭和玉米芯生物炭,采用赤子爱胜蚯蚓(Eisenia fetida)开展为期60 d的堆肥试验。结果表明:相比对照,3种生物炭添加显著增加了种子发芽指数,降低了堆体最终碳氮比,促进了堆肥腐熟,最终堆体全氮、硝态氮和腐植酸含量分别提高10.74%~13.20%、41.91%~54.29%和26.22%~33.44%,不同生物炭之间,添加玉米芯生物炭能提高有机质降解率和全氮含量,添加木屑生物炭可以提高堆体硝态氮含量和腐植酸含量。3种生物炭添加均提高了堆肥细菌的多样性和丰富度,提高了Actinomadura、Ilumatobacter和Saccharomonospora等木质纤维素降解菌的丰度;此外3种生物炭添加促进了铜和锌从可交换态转化为氧化态,钝化率分别提高了11.7个和5.87个百分点,添加竹炭处理对铜和锌的钝化率效果最好,能较好地促进铜和锌从活性较高的可交换态向着稳定性更高的氧化态转化。相关性分析表明,铜和锌的氧化态分配率与腐植酸、木质纤维素降解菌呈显著正相关(P<0.05)。研究表明,竹炭、木屑生物炭和玉米芯生物炭均能提高蚯蚓堆肥腐熟、改善细菌群落结构和增加重金属钝化效率。

关键词：玉米芯生物炭重金属赤子爱胜蚯蚓细菌群落结构园林废弃物

家庭医生个性化服务续约与医养结合服务连续性提升研究

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工业工程与管理 2024年第3期29卷 57-64页

作者：张连杰徐湖洋罗利房圆晨陈旭东梁靖成都理工大学管理科学学院四川成都610059 四川大学商学院四川成都610064

作为医养结合制度优势向实际效能转化的重要抓手,家庭医生签约服务整合医疗康复与养老护理,可以为老年人提供兼具综合性与连续性的健康养老服务。实际中,家庭医生签约服务可分为基础服务和个性化服务。相较于基础服务,个性化服务可以更... 详细信息

作为医养结合制度优势向实际效能转化的重要抓手,家庭医生签约服务整合医疗康复与养老护理,可以为老年人提供兼具综合性与连续性的健康养老服务。实际中,家庭医生签约服务可分为基础服务和个性化服务。相较于基础服务,个性化服务可以更好地满足老年人多元化健康需求,是提升医养结合服务综合性的关键。医养结合服务连续性的提升需要解决个性化服务情景下的家庭医生签约服务续约难的问题。本文采用演化博弈论,解析续约时的家庭医生签约服务与收益,并研究家庭医生与老年人的续约策略选择问题。结果表明:提高家庭医生续约后的收益、降低双方在服务过程中的利益侵占,是解决家庭医生续约难、提升医养结合服务连续性的有效途径。

关键词：家庭医生个性化服务续约策略选择家庭医生签约服务与收益医养结合连续性提升

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非晶合金纤维和钢纤维单/混掺增强混凝土开裂及断裂性能研究

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硅酸盐通报 2024年第6期43卷 2137-2148页

作者：乔险涛喻鹏陈喜健周佳乐张连杰李健朋中铁建(东莞)建设投资有限公司东莞523867 东莞理工学院生态环境与建筑工程学院东莞523803 中国矿业大学力学与土木工程学院徐州221018

为探索纤维混凝土抗裂性能,本文研究了不同类型纤维(平直型钢纤维、平直型非晶合金纤维、钢纤维+非晶合金纤维)和不同纤维体积掺量(1.0%,1.5%和2.0%)混凝土的早期开裂性能和硬化后的断裂性能。首先通过平板法试验并借助数字图像对混凝... 详细信息

为探索纤维混凝土抗裂性能,本文研究了不同类型纤维(平直型钢纤维、平直型非晶合金纤维、钢纤维+非晶合金纤维)和不同纤维体积掺量(1.0%,1.5%和2.0%)混凝土的早期开裂性能和硬化后的断裂性能。首先通过平板法试验并借助数字图像对混凝土的早期裂缝特征进行量化分析,评估了纤维混凝土的早期开裂性能;再通过带切口棱柱体试件的三点弯曲试验,基于双K断裂参数,分析并评估了混凝土硬化后的断裂性能。结果表明,钢纤维单掺和混掺纤维混凝土的早期抗裂性能最好;纤维掺量由1.0%增加至2.0%时,钢纤维、合金纤维和混掺纤维混凝土失稳韧度分别增加了58.9%、44.3%和55.5%,且掺量为2.0%的混掺混凝土断裂能是普通混凝土的11.8倍。钢纤维和非晶合金纤维可在混凝土硬化过程的不同时期发挥协同作用,两种纤维混掺不仅能阻止混凝土早期的塑性开裂,还可有效控制硬化后受拉裂缝的形成和发展,达到分阶段抗裂的目的。综合考虑混凝土的早期开裂性能、硬化后受拉性能以及断裂性能,体积掺量相同情况下混掺纤维混凝土整体性能更优。

关键词：纤维混凝土非晶合金纤维钢纤维开裂性能断裂性能混掺效应

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A dual-mode optical thermometer based on dual-excitation Bi^(3+),Sm^(3+)co-doped Y_(4)GeO_(8) phosphors

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Journal of Rare Earths 2024年第8期42卷 1437-1446,I0002页

作者： Danyu zhang Yuxuan Luo Junyu Chen lianjie Li Hai Guo Department of Physics Zhejiang Normal UniversityJinhua321004China

Dual-excitation and dual-emission Y_(4)GeO_(8):Bi^(3+),Sm^(3+)phosphors were manufactured by traditional solidphase sintering *** X-ray diffraction,morphology,photoluminescence,energy transfer process and temperature sensing properties of Y_(4)GeO_(8):Bi^(3+),Sm^(3+)samples were comprehensively *** Y4GeO_(8):Bi^(3+),Sm^(3+)phosphors exhibit characteristic emissions of Bi^(3+)(^(3)P_(1)→^(1)S_(0)) and Sm^(3+)(^(4)G_(5/2)→^(6)H)under both 290 and 347 nm *** fluorescence intensity ratio and Commission International de L'Eclairage coordinates modes,Y_(4)GeO_(8):Bi^(3+),Sm^(3+)samples present excellent temperature measurement *** maximum relative sensitivity(S_(r-max)) values of the former are 1.55%/K(460 K,290 nm excitation) and 0.82%/K(506 K,347 nm excitation).The S_(r-max)(x) values of the latter are 0.21 %/K(437 K,290 nm excitation) and 0.15%/K(513 K,347 nm excitation).These results illustrate that Y_(4)GeO_(8):Bi^(3+),Sm^(3+)phospho rs can be used as a candidate material for a dual-mode optical thermometer under dual-excitation.

关键词： Dual-mode optical thermometer Luminescent properties Y_(4)GeO_(8):Bi^(3+) Sm^(3+)phosphors Rare earths

Influence of rare earth oxides on microstructure and mechanical properties of nickel-based superalloys fabricated by high energy beam processing:A review

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Journal of Rare Earths 2024年第9期42卷 1629-1645页

作者： lianjie Bi Hua Yan Peilei zhang Haichuan Shi Zhiyuan Li Ruidi Li School of Materials Science and Engineering Shanghai University of Engineering Science College of Agricultural Science and Engineering Hohai University Department of Mechanics and Maritime Science Chalmers University of Technology State Key Laboratory of Powder Metallurgy Central South University

In this paper,the effects of rare earth oxides on the micro structure and mechanical properties of nickelbased superalloys prepared by high-energy beam processing technology were critically *** focus is on the optimal amount of rare earth oxides that can produce ideal *** attention was paid to their main strengthening mechanisms,including solid solution strengthening mainly in the form of solid solution dissolved in the nickel-based alloy and improving the microstructure of the alloy by grain refinement or fine grain strengthening produced by homogenizing the distribution phase.Y2O3,La2O3and CeO2rare earth oxides can also improve the fluidity of the alloy molten pool and reduce the segregation of alloying *** advantages can significantly improve the mechanical properties of the ***,this paper outlines the future research directions of rare earth oxides,aiming to expand their application potential.

关键词： Rare earths High energy beam Nickel-based superalloys Microstructure Mechanical properties

Dynamical Control of Asymmetrically Oblique Tidal Currents to the Sedimentary Characteristics and Development of Linear Sand Ridges in the Liaodong Shoal, East Bohai Sea

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Journal of Ocean University of China 2020年第1期19卷 101-112页

作者： zhang lianjie ZHU Longhai WU Jianzheng HU Rijun WANG Peng zhang Pan College of Marine Geosciences Ocean University of ChinaQingdao 266100China Key Laboratory of Submarine Geosciences and Prospecting Techniques Ministry of EducationOcean University of ChinaQingdao 266100China National Marine Environmental Monitoring Center Dalian 116000China

The Liaodong Shoal is a group of linear sand ridges located in the east Bohai Sea of *** this study,54 surface sediment samples have been collected,current measurements at 4 stations have been carried out and bathymetric data were *** current directions are rightward deflected relative to the strikes of the sand *** by the narrowing effect of the ridge,the current velocities exhibited an anti-‘C’type vertical *** velocities of the lower currents linearly correlate with the water *** near-bed current velocities over the troughs are estimated to be higher than those over the ridges,and this feature could be explained by the loss of kinetic energy together with the conversion between kinetic energy and gravitational potential *** sedimentary characteristics that are compatible with the tidal dynamics are developed across the ridges and troughs,including grain size compositions,grain size parameters,mineral compositions and Dhm *** existence of the angles between the current directions and the strikes of the sand ridges is the key factor for the growth of the sand *** asymmetric hydrodynamic features between the flood and ebb currents lead to the differences in the topographical and sedimentary characteristics on both sides of a sand *** material supply led to the degradation of the sand ridges,and the reduction of the tidal current intensity has led to the development of the subordinate sand ridges in the *** ridges are migrating.

关键词： Liaodong Shoal tidal current ridge heavy minerals sedimentary characteristic development and evolution

Genetic Insights into Glycine’s Protective Role Against CAD—European and East Asia,2015 and 2020

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China CDC weekly 2024年第9期6卷 168-172,I0003-I0008页

作者： Jiaying Yu Zhuolin Zhu Ting Wang Yuanhao Wei lianjie Huang Qianru zhang Yuting zhang Yiran Wang Guiyou Liu Xiang Shu Rennan Feng Department of Nutrition and Food Hygiene School of Public HealthHarbin Medical UniversityHarbin CityHeilongjiang ProvinceChina Key Laboratory of Precision Nutrition and Health of Ministry of Education School of Public HealthHarbin Medical UniversityHarbin CityHeilongjiang ProvinceChina Songyang County Center for Disease Prevention and Control Songyang CityZhejiang Province China Department of Neurology Xuanwu HospitalCapital Medical UniversityBeijingChina Department of Epidemiology and Biostatistics Memorial Sloan Kettering Cancer CenterNew York CityNYUSA

Introduction:The purpose of this study is to examine the potential causal relationship between levels of circulating glycine and coronary artery disease(CAD)using a two-step Mendelian randomization(MR)***:We analyzed data from genome-wide association studies(GWAS)conducted on European and East Asian *** assess the causal effects of circulating glycine levels on the risk of *** used the inverse-variance weighting(IVW),weighted median(WM),MR-Egger,and Mendelian Randomization Pleiotropy RESidual Sum and Outlier(MR-PRESSO)***,we conducted mediation analysis to investigate the contribution of blood pressure and other cardiovascular disease-related ***:The two-step Mendelian randomization analysis revealed that higher levels of glycine in the blood were associated with a reduced risk of CAD in Europeans[odds ratio(OR)=0.84,95%confidence interval(CI):0.72,−0.98;P=0.029]and East Asians:(OR=0.76,95%CI:0.66,−0.89;P=3.57×10−4).Sensitivity analysis confirmed the robustness of these ***,our results suggest that about 6.06%of the observed causal effect is mediated through genetically predicted systolic blood pressure(SBP)in the European ***:Our results contribute to the current knowledge regarding the involvement of glycine in the progression of CAD,and provide valuable methodological insights for the prevention and treatment of this condition.

关键词： CAD prevention involvement