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Numerical investigation on thermomechanical behavior of alumina–calcium hexaluminate refractories for purging plug

Journal of Iron and Steel Research(International) 2024年第2期31卷 389-400页

作者： Li-ping Pan Ya-wei Li Fang-guan tan yi-chen Chen Yang-fan Xu Zhu He Bao-kuan Li The State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and TechnologyWuhan430081HubeiChina National-Provincial Joint Engineering Research Center of High Temperature Materials and Lining Technology Wuhan University of Science and TechnologyWuhan430081HubeiChina

Alumina–spinel refractories used in slit-type purging plugs are susceptible to cross-sectional damage,resulting in a serious mismatch between their service life and that of ***–calcium hexaluminate refractories have gradually become the new trend in purging plug materials with the development of refining *** thermomechanical damage of slit-type purging plugs with alumina–calcium hexaluminate refractory was investigated by the thermo-solid coupling *** with the polynomial fitting and design of experiments methods,the influence of thermophysical parameters on temperature and thermal stress of alumina–calcium hexaluminate refractories for purging plugs was systematically *** results show that the maximum thermal stress of the purging plugs appears during the stages of steel transporting and stirring,and the vulnerable parts are located above Y=0.323 *** thermal conductivity and the coefficient of thermal expansion of the material are the most sensitive parameters to the temperature and thermal stress inside the structure,*** addition of more calcium hexaluminate can relieve the stress concentration and large deformation around the ***,when the content of calcium hexaluminate is 47 wt.%and in the form of aggregate-binder,the temperature and thermal stress distribution inside the refractory are optimal,which can effectively improve the service life of the slit-type purging plug.

关键词： Purging plug Thermomechanical damage Refractory Design of experiments method Stress

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Superior Latent Heat Eutectic Salt Na_(2)CO_(3)-Li_(2)CO_(3)-LiF for Thermal Energy Storage:Preparation and Performance Investigation

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Journal of Thermal Science 2024年第2期33卷 501-508页

作者： LI Weiwei MIAO Qi ZHANG Yelong DING Hongliang YANG Sa LAI Yuan FENG Daili DING Yulong JIN yi tan Linghua School of Chemistry and Chemical Engineering Nanjing University of Science&TechnologyNanjing210094China National Special Superfine Powder Engineering Research Center Nanjing University of Science and TechnologyNanjing210094China Nanjing Jinhe Energy Material Co. LtdNanjing210047China School of Chemical Engineering University of BirminghamBirminghamB152TTUK School of Energy&Environmental Engineering University of Science and Technology BeijingBeijing100083China

In this paper,a novel ternary eutectic salt Na_(2)CO_(3)-Li_(2)CO_(3)-LiF was designed and investigated for concentrated solar power(CSP).The FactSage software was used to predict the composition and eutectic point of Na_(2)CO_(3)-Li_(2)CO_(3)-*** microstructure,thermophysical properties,and thermal stability of eutectic salts were experimentally measured using various analytical *** a mass ratio of 57%:32%:11%,the eutectic salt exhibited excellent thermal storage properties with a fusion enthalpy of 413 J/g and a melting point of 426.8℃.The excellent thermal stability of the eutectic salt was reflected by a weight loss of only 0.8% at 600℃.

关键词： phase change materials ternary eutectic salt latent heat thermal stability

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Effect of the addition of TEOS on the SiC fibers fabricated by electrospinning

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Journal of Advanced Ceramics 2013年第3期2卷 242-245页

作者： Jiayan LI Panpan CAO yi tan Lei ZHANG School of Materials Science and Engineering Dalian University of TechnologyDalian 116024China

Polycarbosilane(PCS)has been widely used to fabricate silicon carbide(SiC)fibers via *** this paper,for improving the morphology of SiC fibers,tetraethyl orthosilicate(TEOS,m=1 g,3 g and 5 g,respectively)was added into the PCS precursor solution(containing 1.5 g PCS).The continuous fibers have been prepared by electrospinning,and then the SiC fibers were synthesized by calcination at 1300℃,1400℃and 1600℃for 4 h respectively with a heating rate of 10℃/min in flowing nitrogen(N_(2)).The morphologies of the fibers were investigated by the scanning electron microscope(SEM)and it could be seen that the crystallinity of the SiC fibers was lower,the length of the SiC fibers was increased,and the diameter was uniform with the increase of the addition amount of TEOS.

关键词： silicon carbide(SiC) tetraethyl orthosilicate(TEOS) electrospinning fibers

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Dual-Confined Bead-Like CoSe_(2)@NC@NCNFs Bifunctional Catalyst Boosting Rechargeable Zinc-Air Batteries

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Chinese Journal of Chemistry 2024年第4期42卷 397-405页

作者： Kuixing Ding Jiugang Hu Liming Zhao Huanan Yu Shan Cai yi Yang Jun tan Hongshuai Hou Xiaobo Ji College of Chemistry and Chemical Engineering Central South UniversityChangshaHunan410083 China College of Materials and Chemistry China Jiliang UniversityHangzhouZhejiang310018 China College of Standardization China Jiliang UniversityHangzhouZhejiang310018 China

Rationally developing efficient and durable bifunctional catalysts toward oxygen reduction reaction(ORR)and oxygen evolution reaction(OER)is critical for rechargeable zinc-air batteries(ZABs).Herein,a bead-like CoSe_(2)@NC@NCNFs bifunctional catalyst was designed and fabricated by confining cubic CoSe_(2)nanoparticles to three-dimensional(3D)porous MOFs-derived nitrogen-doped carbon(NC)and one-dimensional(1D)N-doped carbon nanofibers(NCNFs)through a facile encapsulate *** 1D/3D continuous network structure contributes to the improvement of specific surface area and electronic conductivity,while the strong synergistic effect between CoSe_(2)sites and Co-Nx-C sites can effectively enhance electron/mass transfer and reduce the diffusion *** as-constructed CoSe_(2)@NC@NCNFs catalyst exhibits high catalytic activity and stability toward ORR/OER with a high half-wave potential of 0.80 V(***)in ORR and a low overpotential of 280 mV at 10 mA·cm^(−2)in *** encouragingly,the rechargeable ZABs with CoSe_(2)@NC@NCNFs cathode deliver high peak power densities(126.8 mW·cm^(−2)),large specific capacities(763.1 mA·h·g^(−1)),and robust charge-discharge cycling stability over 240 *** study provides a facile strategy for designing efficient bifunctional catalysts for rechargeable energy conversion applications.

关键词： Dual-confined Electrospinning Cobalt selenide Bifunctional catalysts Rechargeable zinc-air batteries

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Transcriptomic analysis of Andrias davidianus meat and experimental validation for exploring its bioactive components as functional foods

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Food Science and Human Wellness 2024年第1期13卷 166-172页

作者： Changge Guan Zhenglin tan Shucheng Li yi Wang Naoyuki Yamamoto Chong Zhang Songjun Wang Junjie Chen Xinhui Xing Key Laboratory for Industrial Biocatalysis Ministry of Education of ChinaDepartment of Chemical EngineeringTsinghua UniversityBeijing 100084China School of Life Science and Technology Tokyo Institute of TechnologyYokohama 226-0026Japan Sensing System Research Center National Institute of Advanced Industrial Science and TechnologyTsukuba 305-8565Japan Center for Synthetic and Systems Biology Tsinghua UniversityBeijing 100084China Henan Giant Salamander Protection and Development Association Luoyang 471000China Intelligent Computing Research Center Harbin Institute of TechnologyShenzhen 518071China Institute of Biopharmaceutical and Health Engineering Tsinghua Shenzhen International Graduate SchoolShenzhen 518055China Institute of Biomedical Health Technology and Engineering Shenzhen Bay LaboratoryShenzhen 518067China

Andrias davidianus(Chinese giant salamander,CGS)is the largest and oldest extant amphibian species in the world and is a source of prospective functional food in ***,the progress of functional peptides mining was slow due to lack of reference genome and protein sequence *** this study,we illustrated full-length transcriptome sequencing to interpret the proteome of CGS meat and obtain 10703 coding DNA *** functional annotation and amino acid composition analysis,we have discovered various genes related to signal transduction,and 16 genes related to *** have also found vast variety of functional peptides through protein coding sequence(CDS)analysis by comparing the data obtained with the functional peptide ***-Pro-Ile predicted by the CDS analysis was released from the CGS meat through enzymatic hydrolysis,suggesting that our approach is *** study suggested that transcriptomic analysis can be used as a reference to guide polypeptide mining in CGS meat,thereby providing a powerful mining strategy for the bioresources with unknown genomic and proteomic sequences.

关键词： Chinese giant salamander Transcriptomic analysis Bioactive components Functional peptides mining

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Diabetes and high-glucose could upregulate the expression of receptor for activated C kinase 1 in retina

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World Journal of Diabetes 2024年第3期15卷 519-529页

作者： Jian tan Ang Xiao Lin Yang Yu-Lin Tao yi Shao Qiong Zhou Department of Ophthalmology The First Affiliated HospitalJiangxi Medical CollegeNanchang UniversityNanchang 330006Jiangxi ProvinceChina

BACKGROUND Diabetic retinopathy(DR)is a major ocular complication of diabetes mellitus,leading to visual *** pigment epithelium(RPE)injury is a key component of the outer blood retinal barrier,and its damage is an important indicator of *** for activated C kinase 1(RACK1)activates protein kinase C-ε(PKC-ε)to promote the generation of reactive oxygen species(ROS)in RPE cells,leading to ***,we hypothesize that the activation of RACK1 under hypoxic/high-glucose conditions may promote RPE cell apoptosis by modulating PKC-ε/ROS,thereby disrupting the barrier effect of the outer blood retinal barrier and contributing to the progression of *** To investigate the role and associated underlying mechanisms of RACK1 in the development of early *** In this study,Sprague-Dawley rats and adult RPE cell line-19(ARPE-19)cells were used as in vivo and in vitro models,respectively,to explore the role of RACK1 in mediating PKC-εin early ***,the impact of RACK1 on apoptosis and barrier function of RPE cells was also investigated in the former *** Streptozotocin-induced diabetic rats showed increased apoptosis and upregulated expression of RACK1 and PKC-εproteins in RPE cells following a prolonged ***,ARPE-19 cells exposed to high glucose and hypoxia displayed elevated mRNA and protein levels of RACK1 and PKC-ε,accompanied by an increases in ROS production,apoptosis rate,and monolayer ***,silencing RACK1 significantly downregulated the expression of PKC-εand ROS,reduced cell apoptosis and permeability,and protected barrier *** RACK1 plays a significant role in the development of early DR and might serve as a potential therapeutic target for DR by regulating RPE apoptosis and barrier function.

关键词： Diabetic retinopathy Receptor for activated C kinase 1 Protein kinase C-ε Adult retinal pigment epithelium cell line-19

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基于Logistic回归模型的针刺蝶腭神经节治疗变应性鼻炎疗效影响因素研究

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中华中医药杂志 2024年第1期39卷 429-434页

作者：张鹏商晓娟谭翊杨静王奎吉许世闻汪芗孙三峰於堃赵新雨舒凝杨威陈陆泉首都医科大学附属北京同仁医院北京100010 北京市平谷区中医医院针灸科北京101200 北京市通州区中西医结合医院针灸科北京101149 北京市怀柔区中医医院康复科北京101400 首都医科大学附属复兴医院月坛社区卫生服务中心北京100032 北京市朝阳区中医医院针灸科北京100020 北京市丰台区洋桥门诊部北京100068

目的:探讨影响针刺蝶腭神经节治疗变应性鼻炎(AR)疗效的医患因素。方法:回顾2017年4月至2018年6月北京地区7个分中心收集的222例AR患者针刺蝶腭神经节治疗的病例报告,提取可能影响疗效的医患因素,计算患者针刺前后症状改善率,采用χ2检... 详细信息

目的:探讨影响针刺蝶腭神经节治疗变应性鼻炎(AR)疗效的医患因素。方法:回顾2017年4月至2018年6月北京地区7个分中心收集的222例AR患者针刺蝶腭神经节治疗的病例报告,提取可能影响疗效的医患因素,计算患者针刺前后症状改善率,采用χ2检验对提取因素进行筛选,再采用非条件Logistic回归模型分析筛选因素,并评估该模型的预测价值。结果:患者体质,医师年龄、年门诊量、学历是可能影响针刺疗效的因素,相比阳虚质,气虚质患者获得满意疗效的概率降低了79.489%,而平和质患者该概率增加了198.937%;相比30岁以下医师,40~49岁医师的患者获得满意疗效的概率降低了76.018%,50~59岁医师的该概率降低了97.472%;相比本科学历医师,研究生学历医师的患者获得满意疗效的概率疗降低了85.925%,该模型ROC曲线的AUC值为0.751。结论:平和质患者针刺治疗效果最佳,规范培训可以帮助针灸医师掌握该项技术,针刺蝶腭神经节治疗AR遵循中医针灸学理论指导。

关键词：蝶腭神经节变应性鼻炎多中心研究针刺疗效影响因素 Logistic回归模型

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Predicting hepatocellular carcinoma: A new non-invasive model based on shear wave elastography

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World Journal of Gastroenterology 2024年第25期30卷 3166-3178页

作者： Dong Jiang yi Qian yi-Jun Gu Ru Wang Hua Yu Hui Dong Dong-Yu Chen Yan Chen Hao-Zheng Jiang Bi-Bo tan Min Peng yi-Ran Li Department of Ultrasound Eastern Hepatobiliary Surgery HospitalThe Third Affiliated Hospital of Naval Medical UniversityShanghai 200433China Department of Pathology Shanghai Eastern Hepatobiliary Surgery HospitalThird Affiliated Hospital of Naval Medical UniversityShanghai 200433China Department of College of Art and Science Case Western Reserve UniversityClevelandOH 44106United States Ultrasound Diagnosis PLA Naval Medical CenterShanghai 200437China

BACKGROUND Integrating conventional ultrasound features with 2D shear wave elastography(2D-SWE)can potentially enhance preoperative hepatocellular carcinoma(HCC)*** To develop a 2D-SWE-based predictive model for preoperative identification of *** A retrospective analysis of 884 patients who underwent liver resection and pathology evaluation from February 2021 to August 2023 was conducted at the Oriental Hepatobiliary Surgery *** patients were divided into the modeling group(n=720)and the control group(n=164).The study included conventional ultrasound,2D-SWE,and preoperative laboratory *** logistic regression was used to identify independent predictive factors for RESULTS In the modeling group analysis,maximal elasticity(Emax)of tumors and their peripheries,platelet count,cirrhosis,and blood flow were independent risk indicators for *** factors yielded an area under the curve of 0.77(95%confidence interval:0.73-0.81)with 84%sensitivity and 61%*** model demonstrated good calibration in both the construction and validation cohorts,as shown by the calibration graph and Hosmer-Lemeshow test(P=0.683 and P=0.658,respectively).Additionally,the mean elasticity(Emean)of the tumor periphery was identified as a risk factor for microvascular invasion(MVI)in malignant liver tumors(P=0.003).Patients receiving antiviral treatment differed significantly in platelet count(P=0.002),Emax of tumors(P=0.033),Emean of tumors(P=0.042),Emax at tumor periphery(P<0.001),and Emean at tumor periphery(P=0.003).CONCLUSION 2D-SWE’s hardness value serves as a valuable marker for enhancing the preoperative diagnosis of malignant liver lesions,correlating significantly with MVI and antiviral treatment efficacy.

关键词： Shear wave elastography Predicting model Microvascular invasion Antiviral treatment Hepatocellular carcinoma

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三种机器学习算法预测心力衰竭死亡的价值研究

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医学信息 2024年第11期37卷 11-15页

作者：陈晓彤岑梓熹谭静仪栾雅彭师师严波何震广州新华学院健康学院江苏科技大学材料工程学院

目的用机器学习三种不同算法建立心力衰竭分类预测模型，比较模型的准确率，并分析心力衰竭死亡事件重要性特征，对人群尽早发现和实施介入措施提供援助，努力提高人们的健康水平和生活质量。方法使用Kaggle平台发布的心力衰竭数据集... 详细信息

目的用机器学习三种不同算法建立心力衰竭分类预测模型，比较模型的准确率，并分析心力衰竭死亡事件重要性特征，对人群尽早发现和实施介入措施提供援助，努力提高人们的健康水平和生活质量。方法使用Kaggle平台发布的心力衰竭数据集，通过缺失值填充法、数据标准化处理、SMOTE方法进行数据预处理。基于随机森林、C4.5、AdaBoost算法建立心力衰竭预测模型。使用性能评估指标混淆矩阵、ROC曲线、均方根误差以及均值绝对误差评估评价模型性能。结果 PermutationImportance给出的变量重要性排序中，血清肌酐水平、年龄、血清钠离水平排序靠前。三种模型中，随机森林模型准确率为85%，精确率为81%，召回率为68%;C4.5模型准确率为83%，精确率为80%，召回率为63%;AdaBoost模型准确率为80%，精确率为71%，召回率为63%。结论基于所用数据集，随机森林模型优于C4.5模型与AdaBoost模型，心力衰竭死亡风险预测模型能为心力衰竭早期预防控制及诊断提供参考依据。

关键词：心力衰竭死亡预测模型 C4.5 随机森林 AdaBoost

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Birefringence Optical Feedback with a Folded Cavity in HeNe Laser

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Chinese Physics Letters 2013年第1期30卷 75-78页

作者：吴云谈宜东 The State Key Laboratory of Precision Measurement Technology and Instruments Department of Precision InstrumentsTsinghua UniversityBeijing 100084

The birefringence optical feedback with a folded cavity in HeNe laser is investigated.A theory model based on the equivalent cavity of the Fabry–Perot interferometer is *** phase difference between the two intensities in birefringence feedback is twice the retardation of the wave *** phase difference is invariable when the length of the feedback cavity *** the adoption of a cube corner prism(CCP)to form a folded cavity,the fringe frequency is doubled,and the resolution of the displacement sensor based on birefringence optical feedback with a folded cavity is improved.A resistance chain of 5-fold subdivision and 4-fold logic subdivision is used as further *** resolution ofλ/80 is obtained eventually;for 632.8 nm HeNe laser it is 7.91 *** displacement sensor based on birefringence optical feedback with a folded cavity is simple and of high resolution,large measurement range,low cost,and is of great application potential in industry.

关键词： HeNe interferometer cavity

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