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Thermodynamic modeling of Fe-C-Mn-Si alloys

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Journal of Iron and Steel Research International 2017年第2期24卷 190-197页

作者： wei-sen zheng Xiao-gang Lu Yan-lin He Lin Li School of Materials Science and Engineering Shanghai University Shanghai 200444 China Department of Materials Science and Engineering KTH Royal Institute of Technology Stockholm 10044 Sweden State Key Laboratory of Advanced Special Steel Shanghai University Shanghai 200072 China

The thermodynamic database of the Fe C Mn-Si system has been developed in the framework of the CALPHAD approach. The sub-ternary systems have been carefully evaluated and revised based on available experimental data. A satisfactory description of the liquid phase in the Fe C-Si system has been obtained. The C Mn Si system was assessed treating the liquid phase as a substitutional solution. Phase equilibria in the C- Mn-Si system, especially those involving the liquid phase, can be well described. Based on the extrapolation of the experimental data in the quaternary system, the Fe Mn Si system has been modified to agree well with experimental data at high temperatures. The comparison between the calculated and measured phase transformation tempera tures confirms the reliability of the present quaternary database. Additionally, the solidification process of Fe-0. 16C-1. 5Mn-1. 5Si （wt. %） alloy was simulated by using the thermodynamic database developed.

关键词： Fe-C-Mn-Si alloy Thermodynamic mode CALPHAD Solidification Partial equilibrium

Experimental study of phase equilibria on Co-Fe-rich side of Co-Al-Fe system

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Journal of Iron and Steel Research International 2020年第6期27卷 673-680页

作者： Jing-jing Wang wei-sen zheng Xiao-gang Lu Yan-lin He Qing-rong Yao Jiang Wang School of Materials Science and Engineering Shanghai UniversityShanghai 200444China Materials Genome Institute Shanghai UniversityShanghai200444China State Key Laboratory of Advanced Special Steel Shanghai UniversityShanghai200444China School of Materials Science and Engineering Guilin University of Electronic TechnologyGuilin 541004GuangxiChina

Despite various studies on Co-Al-Fe ternary system, its phase equilibria are still in doubt. Phase equilibria, magnetic transition and bcc_A2/bcc_B2 order-disorder transformation at the Co-Fe-rich side of the Co-Al-Fe alloys were carefully investigated by means of electron probe microanalysis (EPMA), X-ray diffraction (XRD) and differential scanning calo-rimetry. The equilibrium phases and their compositions were determined by 18 alloy samples annealed at 900, 1000, 1100 and 1200℃ for 528, 336, 168 and 96h, respectively, followed by quenching. However, by adopting the above traditional method, bcc_A2 and fcc_A1 phases are difficult to be distinguished through XRD analysis at room temperature due to the martensitic transformation of fcc_A1 phase during quenching. For this reason, high-temperature insitu XRD technique was utilized to correctly establish the phase relationships among bcc_A2, bcc_B2 and fcc_A1 phases. The phase transformation between bcc_A2 and B2 phases was determined to be second order instead of first order at temperatures higher than 900℃. The equilibrium phases and compositions were further confirmed by fabricating 16 diffusion couples together with EPMA. Meanwhile, using three-dimensional differential scanning calorimetry method, bcc_A2/B2 and ferro-/paramagnetic transi-tions were determined with high accuracy.

关键词： Co-Al-Fe system Phase equilibrium Martensitic transformation Order-disorder transition

Role of iron ore in enhancing gasification of iron coke:Structural evolution,influence mechanism and kinetic analysis

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International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 58-69页

作者： Jie Wang wei Wang Xuheng Chen Junfang Bao Qiuyue Hao Heng zheng Runsheng Xu School of Chemistry and Materials Science Hubei Engineering UniversityXiaogan 432000China Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education Wuhan University of Science and TechnologyWuhan 430081China Institue of Ironmaking Technology Baosteel Central Research InstituteShanghai 201999China State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China

The utilization of iron coke provides a green pathway for low-carbon *** uncover the influence mechanism of iron ore on the behavior and kinetics of iron coke gasification,the effect of iron ore on the microstructure of iron coke was ***,a comparative study of the gasification reactions between iron coke and coke was conducted through non-isothermal thermogravimetric *** findings indicate that compared to coke,iron coke exhibits an augmentation in micropores and specific surface area,and the micropores further extend and *** provides more adsorption sites for CO_(2) molecules during the gasification process,resulting in a reduction in the initial gasification temperature of iron *** the heating rate in non-isothermal gasification can enhance the reactivity of iron *** metallic iron reduced from iron ore is embedded in the carbon matrix,reducing the orderliness of the carbon structure,which is primarily responsible for the heightened reactivity of the carbon *** kinetic study indicates that the random pore model can effectively represent the gasification process of iron coke due to its rich pore ***,as the proportion of iron ore increases,the activation energy for the carbon gasification gradually decreases,from 246.2 kJ/mol for coke to 192.5 kJ/mol for iron coke 15wt%.

关键词： low-carbon ironmaking iron coke gasification structural evolution kinetic model

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一种基于偏转镜的激光空间合束方法研究

电光与控制 2018年第5期25卷 96-99,114页

作者：郭豹张兵黄伟李卫森郑耀锋中国电子科技集团公司第二十七研究所郑州450047

为提高激光武器系统的作战效能,通过分析激光远场空间合束发展现状,设计了一种基于偏转镜的激光自动合束装置,并进行了2路激光聚焦、合束、打击效能试验。试验结果表明,该方法达到了预期的调焦效果及合束性能;与单路高能激光毁伤时间相... 详细信息

为提高激光武器系统的作战效能,通过分析激光远场空间合束发展现状,设计了一种基于偏转镜的激光自动合束装置,并进行了2路激光聚焦、合束、打击效能试验。试验结果表明,该方法达到了预期的调焦效果及合束性能;与单路高能激光毁伤时间相比,2路合束后的高能激光对无人机的打击毁伤时间减少了58%,为今后的多路激光空间合束工作提供了坚实的研究基础。

关键词：激光武器作战效能偏转镜高能激光合束调焦

Pretreatment red blood cell distribution width as a predictive marker for postoperative complications after laparoscopic pancreatoduodenectomy

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World Journal of Gastrointestinal Oncology 2025年第1期17卷 143-157页

作者： Xian-Rang Cao Yin-Long Xu Jia-wei Chai Kai zheng Jun-Jie Kong Jun Liu Shun-Zhen zheng Department of Liver Transplantation and Hepatobiliary Surgery Shandong Provincial Hospital Affiliated to Shandong First Medical UniversityJinan 250021Shandong ProvinceChina Department of Breast and Thyroid Surgery Shandong Provincial Maternal and Child Health Care HospitalJinan 250014Shandong ProvinceChina

BACKGROUND Red blood cell distribution width(RDW)is associated with the development and progression of various *** To explore the association between pretreatment RDW and short-term outcomes after laparoscopic pancreatoduodenectomy(LPD).METHODS A total of 804 consecutive patients who underwent LPD at our hospital between March 2017 and November 2021 were retrospectively *** between pretreatment RDW and clinicopathological characteristics and short-term outcomes were *** Patients with higher pretreatment RDW were older,had higher Eastern Cooperative Oncology Group scores and were associated with poorer short-term outcomes than those with normal *** pretreatment RDW was an independent risk factor for postoperative complications(POCs)(hazard ratio=2.973,95%confidence interval:2.032-4.350,P<0.001)and severe POCs of grade IIIa or higher(hazard ratio=3.138,95%confidence interval:2.042-4.824,P<0.001)based on the Clavien-Dino classification *** analysis showed that high pretreatment RDW was an independent risk factor for Clavien-Dino classi-fication grade IIIb or higher POCs,a comprehensive complication index score≥26.2,severe postoperative pancreatic fistula,severe bile leakage and severe *** pretreatment RDW was positively associated with the neutrophil-to-lymphocyte ratio and platelet-to-lymphocyte ratio and was negatively associated with albumin and the prognostic nutritional *** Pretreatment RDW was a special parameter for patients who underwent *** was associated with malnutrition,severe inflammatory status and poorer short-term *** could be a surrogate marker for nutritional and inflammatory status in identifying patients who were at high risk of developing POCs after LPD.

关键词： Biomarker Laparoscopic pancreatoduodenectomy Postoperative complication Red blood cell distribution width Short-term outcomes

Small modifications of endo-functionalized cavities lead to large changes in molecular interaction in water

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Science China Chemistry 2025年第01期 369-376页

作者： Song-Meng Wang Hao Nian Yan-Fang Wang Li-Shuo zheng Yu-Tao zheng Yi-wei Dong Liping Huang Xiaoping Wang wei Jiang Liu-Pan Yang Department of Chemistry Southern University of Science and Technology School of Chemistry and Pharmaceutical Sciences State Key Laboratory for Chemistry and Molecular Engineering of Medicinal ResourcesGuangxi Normal University School of Pharmaceutical Science Hengyang Medical School University of South China

Studying molecular recognition in aqueous environments is crucial for understanding biological processes. Herein, we present a series of N-doped endo-functionalized anthracene-based cavities by introducing inward-directed pyridine units. The subtle modifications can significantly affect the binding properties of these receptors, which is similar to the mutations in biological systems. Combining theoretical calculations and molecular recognition experiments demonstrated that these “mutations” have an impact on the hydrophobicity and charge distribution of the hosts, consequently significantly influencing molecular *** is crucial for understanding the intricate mechanisms of molecular-level interactions in biological receptors.

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农村生活垃圾集中处理的农户认知与行为响应:以治理情境为调节变量

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生态与农村环境学报 2017年第2期33卷 127-134页

作者：林丽梅刘振滨黄森慰郑逸芳福建农林大学公共管理学院福建福州350002

农户既是农村生活垃圾污染的制造者和受害者,同时也是污染治理的主要受益者,这一多重身份使得研究农户参与生活垃圾集中处理的行为机理具有重要意义。基于福建省270位农户的调查数据,利用层次回归模型分析农村生活垃圾集中处理中农户心... 详细信息

农户既是农村生活垃圾污染的制造者和受害者,同时也是污染治理的主要受益者,这一多重身份使得研究农户参与生活垃圾集中处理的行为机理具有重要意义。基于福建省270位农户的调查数据,利用层次回归模型分析农村生活垃圾集中处理中农户心理认知与其行为响应的关系,并引入治理情境作为调节变量,分析治理情境对农户的心理认知-处理行为关系的调节效应。研究结果表明:(1)农村生活垃圾处理中农户的行为态度对其垃圾分类、处理费支付以及定点倾倒行为均具有显著的正向影响,而主观规范仅对垃圾处理费支付与定点倾倒等集体性质行为具有显著正向影响。(2)治理情境因素中的生活垃圾处理设施清理频率在农户心理认知与3类处理行为之间均起到正向调节作用,农户住房到垃圾处理设施距离对处理费支付行为和定点倾倒行为具有显著负向调节作用,而对垃圾分类行为具有显著正向调节作用。生活垃圾收集设施数量对处理费支付行为和定点倾倒行为具有正向调节作用,对生活垃圾分类行为不具有调节作用。

关键词：农村生活垃圾集中处理行为态度主观规范治理情境

Development of a nomogram for overall survival in patients with esophageal carcinoma:A prospective cohort study in China

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World Journal of Gastrointestinal Oncology 2025年第1期17卷 158-168页

作者： Shi-Shi Yu Xi zheng Xiao-Sheng Li Qian-Jie Xu wei Zhang Zhong-Li Liao Hai-Ke Lei Department of Gastroenterology Chongqing University Cancer HospitalChongqing 400030China Chongqing Cancer Multi-omics Big Data Application Engineering Research Center Chongqing University Cancer HospitalChongqing 400030China Department of Health Statistics School of Public HealthChongqing Medical UniversityChongqing 400016China

BACKGROUND Esophageal carcinoma(EC)presents a significant public health issue in China,with its prognosis impacted by myriad *** creation of a reliable prog-nostic model for the overall survival(OS)of EC patients promises to greatly advance the customization of treatment *** To create a more systematic and practical model that incorporates clinically significant indicators to support decision-making in clinical *** This study utilized data from a prospective longitudinal cohort of 3127 EC patients treated at Chongqing University Cancer Hospital between January 1,2018,and December 12,*** the least absolute shrinkage and selection operator regression alongside multivariate Cox regression analyses helped pinpoint pertinent variables for constructing the *** efficacy was assessed by concordance index(C-index),area under the receiver operating characteristic curve(AUC),calibration curves,and decision curve analysis(DCA).RESULTS Nine variables were determined to be significant predictors of OS in EC patients:Body mass index(BMI),Karnofsky performance status,TNM stage,surgery,radiotherapy,chemotherapy,immunotherapy,platelet-to-lymphocyte ratio,and albumin-to-globulin ratio(ALB/GLB).The model demonstrated a C-index of 0.715(95%CI:0.701-0.729)in the training cohort and 0.711(95%CI:0.689-0.732)in the validation *** the training cohort,AUCs for 1-year,3-year,and 5-year OS predictions were 0.773,0.787,and 0.750,respectively;in the validation cohort,they were 0.772,0.768,and 0.723,respectively,illustrating the model's *** curves and DCA verified the model's predictive accuracy and net *** A novel prognostic model for determining the OS of EC patients was successfully developed and validated to help clinicians in devising individualized treatment schemes for EC patients.

关键词： Esophageal carcinoma High-risk factors Prognosis Overall survival Prediction model

Association between autoimmune gastritis and gastric polyps:Clinical characteristics and risk factors

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World Journal of Gastrointestinal Oncology 2025年第1期17卷 73-87页

作者： Jing-zheng Jin Xiao Liang Shu-Peng Liu Rui-Lan Wang Qing-wei Zhang Yu-Feng Shen Xiao-Bo Li Division of Gastroenterology and Hepatology Renji HospitalShanghai Jiao Tong University School of MedicineShanghai 200127China Division of Gastroenterology and Hepatology Shanghai Institute of Digestive DiseasesShanghai 200001China Division of Gastroenterology and Hepatology Renji Hospital Affiliated to Shanghai Jiao Tong University School of MedicineShanghai 200127China Division of Gastroenterology and Hepatology Sichuan Armed Police Corps HospitalLeshan 610041Sichuan ProvinceChina Division of Gastroenterology and Hepatology NHC Key Laboratory of Digestive DiseasesRenji HospitalShanghai Jiao Tong University School of MedicineShanghai 200127China Department of Gastroenterology Renji Hospital Affiliated to Shanghai Jiao Tong University School of Medicine Shanghai Institute of Digestive DiseasesShanghai 200127China

BACKGROUND The relationship between autoimmune gastritis(AIG)and gastric polyps(GPs)is not well *** To explore the clinical characteristics and risk factors of AIG with GPs in *** This double center retrospective study included 530 patients diagnosed with AIG from July 2019 to July *** collected clinical,biochemical,serological,and demographic data were of each *** regression analyses,both multivariate and univariate,were conducted to pinpoint independent risk factors for GPs in patients with AIG *** operating characteristic curves were utilized to establish the optimal cutoff values,sensitivity,and specificity of these risk factors for predicting GPs in patients with *** Patients with GPs had a higher median age than those without GPs[61(52.25-69)years vs 58(47-66)years,P=0.006].The gastrin-17 levels were significantly elevated in patients with GPs compared with those without GPs[91.9(34.2-138.9)pmol/mL vs 60.9(12.6-98.4)pmol/mL,P<0.001].Additionally,the positive rate of parietal cell antibody(PCA)antibody was higher in these patients than in those without GPs(88.6%vs 73.6%,P<0.001).Multivariate and univariate analyses revealed that PCA positivity[odds ratio(OR)=2.003,P=0.017],pepsinogen II(OR=1.053,P=0.015),and enterochromaffin like cells hyperplasia(OR=3.116,P<0.001)were significant risk factors for GPs,while pepsinogen I was identified as a protective *** PCA positivity and enterochromaffin like cells hyperplasia are significant risk factor for the development of GPs in patients with *** gastrin-17 levels may also play a role in this *** findings suggest potential targets for further research and therapeutic intervention in managing GPs in patients with AIG.

关键词： Autoimmune gastritis Gastric polyps Neuroendocrine tumor Risk factors Nomogram