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Computed tomography-based radiomics to predict early recurrence of hepatocellular carcinoma post-hepatectomy in patients background on cirrhosis

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World Journal of Gastroenterology 2024年第15期30卷 2128-2142页

作者： Gui-Xiang Qian Zi-Ling Xu yong-Hai Li Jian-Lin Lu Xiang-Yi Bu Ming-Tong Wei Wei-Dong Jia Department of Hepatic Surgery Anhui Provincial HospitalThe First Affiliated Hospital of USTCDivision of Life Science and MedicineUniversity of Science and Technology of ChinaHefei 230001Anhui ProvinceChina Department of Hepatic Surgery Anhui Provincial Hospital Affiliated to Anhui Medical UniversityAnhui Medical UniversityHefei 230001Anhui ProvinceChina Department of Anorectal Surgery the First People’s Hospital of HefeiHefei 230001Anhui ProvinceChina

BACKGROUND The prognosis for hepatocellular carcinoma(HCC)in the presence of cirrhosis is unfavourable,primarily attributable to the high incidence of *** To develop a machine learning model for predicting early recurrence(ER)of posthepatectomy HCC in patients with cirrhosis and to stratify patients’overall survival(OS)based on the predicted risk of *** In this retrospective study,214 HCC patients with cirrhosis who underwent curative hepatectomy were *** feature selection was conducted using the least absolute shrinkage and selection operator and recursive feature elimination ***-radiologic features were selected through univariate and multivariate logistic regression *** machine learning methods were used for model comparison,aiming to identify the optimal *** model’s performance was evaluated using the receiver operating characteristic curve[area under the curve(AUC)],calibration,and decision curve ***,the Kaplan-Meier(K-M)curve was used to evaluate the stratification effect of the model on patient *** Within this study,the most effective predictive performance for ER of post-hepatectomy HCC in the background of cirrhosis was demonstrated by a model that integrated radiomics features and clinical-radiologic *** the training cohort,this model attained an AUC of 0.844,while in the validation cohort,it achieved a value of *** K-M curves illustrated that the combined model not only facilitated risk stratification but also exhibited significant discriminatory ability concerning patients’*** The combined model,integrating both radiomics and clinical-radiologic characteristics,exhibited excellent performance in HCC with *** K-M curves assessing OS revealed statistically significant differences.

关键词： Machine learning Radiomics Hepatocellular carcinoma Cirrhosis Early recurrence Overall survival Computed tomography Prognosis Risk factor Delta-radiomics

METTL3 regulates glucose transporter expression in placenta exposed to hyperglycemia through the mTOR signaling pathway

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Chinese Medical Journal 2024年第13期137卷 1563-1575页

作者： Jie Ning Jing Huai Shuxian Wang Jie Yan Rina Su Muqiu Zhang Mengtong Liu Huixia yang Department of Obstetrics and Gynaecology Peking University First HospitalBeijing 100034China Beijing Key Laboratory of Maternal Foetal Medicine of Gestational Diabetes Mellitus Beijing 100034China Peking University Beijing 100034China

Background:Alterations in the placental expression of glucose transporters(GLUTs),the crucial maternal-fetal nutrient transporters,have been found in women with hyperglycemia in pregnancy(HIP).However,there is still uncertainty about the underlying effect of the high-glucose environment on placental GLUTs expression in ***:We quantitatively evaluated the activity of mammalian target of rapamycin(mTOR)and expression of GLUTs(GLUT1,GLUT3,and GLUT4)in the placenta of women with normal pregnancies(CTRL,n=12)and pregnant women complicated with poorly controlled type 2 diabetes mellitus(T2DM,n=12)by *** addition,BeWo cells were treated with different glucose concentrations to verify the regulation of ***,changes in the expression of GLUTs following the activation or suppression of the mTOR pathway were also assessed using MHY1485/rapamycin(RAPA)treatment or small interfering RNA(siRNA)-mediated silencing ***,we further explored the alteration and potential upstream regulatory role of methyltransferase-like 3(METTL3)when exposed to ***:mTOR,phosphorylated mTOR(p-mTOR),and GLUT1 protein levels were upregulated in the placenta of women with T2DM compared with those *** BeWo cells,mTOR activity increased with increasing glucose concentration,and the expression of GLUT1,GLUT3,and GLUT4 as well as GLUT1 cell membrane translocation were upregulated by hyperglycemia to varying *** the drug-mediated and genetic depletion of mTOR signaling in BeWo cells suppressed GLUTs expression,whereas MHY1485-induced mTOR activation upregulated GLUTs ***,high glucose levels upregulated METTL3 expression and nuclear translocation,and decreasing METTL3 levels suppressed GLUTs expression and mTOR activity and vice ***,in METTL3 knockdown BeWo cells,the inhibitory effect on GLUTs expression was eliminated by activating the mTOR signaling pathway using ***:High-g

关键词： Glucose transporters Hyperglycemia Type 2 diabetes mellitus Pregnancy Mammalian target of rapamycin Methyltransferase-like 3

Practical Experience of Management of Urban Parks at Home and Abroad

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Meteorological and Environmental Research 2024年第1期15卷 30-37页

作者： Wenqian LING yong ZHU Qinhuai XU Chengdu Institute of Planning&Design Chengdu 610061China

By systematically reviewing the practical experience of management of urban parks at home and abroad,the advanced experience in organization,management system,operation mechanism and social participation were summarized,and the optimization and improvement measures for the construction and management of urban parks in Chengdu were proposed to provide reference for the high-level construction,high-quality experience and efficient management of urban parks in the construction of park city demonstration zone in Chengdu.

关键词： Urban parks Management and operation Domestic and foreign experience Chengdu Park city

舰船脉冲功率负载Buck变换器自适应阻尼比控制方法

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中国电机工程学报 2024年第13期44卷 5246-5257,I0019页

作者：林周宏黄文焘邰能灵庞路李智鹃杨咏上海智能船舶综合电力系统工程技术研究中心(上海交通大学) 上海市闵行区200240 中船集团第708研究所上海市黄埔区200011 船舶与海洋工程特种装备与动力系统国家工程研究中心上海市徐汇区200030

针对脉冲功率负载的周期性功率突变造成接口变换器输出电压瞬时跌落和持续扰动的问题,提出一种Buck变换器的自适应阻尼比控制方法,使得输出电压的响应性能能够直接通过阻尼比实现精确调节,不依赖于控制参数,且对输入电压扰动具有抑制作... 详细信息

针对脉冲功率负载的周期性功率突变造成接口变换器输出电压瞬时跌落和持续扰动的问题,提出一种Buck变换器的自适应阻尼比控制方法,使得输出电压的响应性能能够直接通过阻尼比实现精确调节,不依赖于控制参数,且对输入电压扰动具有抑制作用。该方法通过引入类电压环消除了时变的输入和占空比的非线性饱和,建立输出电压与其参考值的单输入单输出二阶系统,将不确定负载扰动的控制问题转化为二阶系统的阻尼比控制问题。此外,在不影响电压调节性能的前提下,通过附加占空比调节实现并联变换器供电结构的均流控制。仿真和硬件在环实验结果表明,在脉冲功率负载的不同暂态过程,并联变换器均能够实现快速平滑的电压调节和输出电流均衡。

关键词： Buck变换器脉冲功率负载自适应阻尼比控制电压调节电流均衡舰船电力系统

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A numerical model study on the spatial and temporal variabilities of dissolved oxygen in Qinzhou Bay of the northern Beibu Gulf

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Acta Oceanologica Sinica 2024年第6期43卷 49-59页

作者： Gaolei Cheng Shiqiu Peng Bin yang Dongliang Lu State Key Laboratory of Tropical Oceanography South China Sea Institute of OceanologyChinese Academy of SciencesGuangzhou 510301China Laboratory for Regional Oceanography and Numerical Modeling Qingdao National Laboratory for Marine Science and TechnologyQingdao 266237China Guangxi Key Laboratory of Marine Environmental Change and Disaster in the Beibu Gulf Beibu Gulf UniversityQinzhou 535011China

Oxygen facilitates the breakdown of the organic material to provide energy for *** concentration of dissolved oxygen(DO) in the water must exceed a certain threshold to support the normal metabolism of marine *** in the northern B eibu Gulf,Qinzhou B ay receives abundant freshwater and nutrients from several rivers which significantly influence the level of the dissolved ***,the spatial-temporal variations of DO as well as the associated driving mechanisms have been rarely studied through field *** this study,a three-dimension al coupled physical-biogeochemical model is used to investigate the spatial and seasonal variations of the DO and the associated driving mechanisms in Qinzhou B *** validation against observations indicates that the model can capture the seasonal and inter-annual variability of the DO concentration with the range of 5-10 mg/*** experiments show that the river discharges,winds and tides play crucial roles in the seasonal variability of the DO by changing the vertical mixing and stratification of the water column and the circulation *** winter,the tide and wind forces have strong effects on the DO distribution by enhancing the vertical mixing,especially near the bay *** summer,the river discharges play a dominant role in the DO distribution by inhibiting the vertical water exchange and delivering more nutrients to the Bay,which increases the DO depletion and results in lower DO on the bottom of the estuary salt *** findings can contribute to the preservation and management of the coastal environment in the northern Beibu Gulf.

关键词： river plume dissolved oxygen stratification physical-biological model

高复发进展风险MIBC根治术后辅助化疗和辅助免疫治疗联合化疗的疗效

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中华泌尿外科杂志 2024年第3期45卷 187-194页

作者：李智杨绍博王泽今沈冲张英郎张羽姜润学张哲徐勇胡海龙天津医科大学第二医院泌尿外科天津300211 解放军总医院泌尿外科工作北京 100853

目的探讨高复发进展风险(pT_(2)期伴淋巴结阳性,pT_(3~4a)期伴或不伴淋巴结阳性)肌层浸润性膀胱癌(MIBC)根治术后,辅助化疗和辅助免疫治疗联合化疗的疗效。方法回顾性分析2016年8月至2022年1月天津医科大学第二医院收治的217例高复发进... 详细信息

目的探讨高复发进展风险(pT_(2)期伴淋巴结阳性,pT_(3~4a)期伴或不伴淋巴结阳性)肌层浸润性膀胱癌(MIBC)根治术后,辅助化疗和辅助免疫治疗联合化疗的疗效。方法回顾性分析2016年8月至2022年1月天津医科大学第二医院收治的217例高复发进展风险MIBC患者的临床资料。男183例(84.3%),女34例(15.7%);年龄(67.3±8.6)岁。217例均行根治性膀胱切除术+盆腔淋巴结清扫,根据术后接受辅助治疗情况分为观察组147例(67.7%)和治疗组70例(32.3%)。观察组和治疗组的年龄分别为(67.4±9.0)岁和(66.3±7.6)岁(P=0.14);术后病理分期T_(2)期伴淋巴结阳性分别为8例(5.4%)和6例(8.6%),T_(3~4a)期伴淋巴结阳性分别为34例(23.1%)和18例(25.7%),T_(3~4a)期不伴淋巴结阳性分别为105例(71.5%)和46例(65.7%)(P>0.05);肿瘤直径≥3cm分别为118例(80.3%)和54例(77.1%)(P>0.05),0.05)。治疗组70例中,36例(16.6%)术后应用吉西他滨(1000mg/m^(2),第1、8天)和顺铂(75mg/m^(2),第2~4天)方案化疗(化疗组);34例(15.7%)应用免疫检查点抑制剂(静脉滴注信迪利单抗200mg或替雷利珠单抗200mg或特瑞普利单抗240mg,第1天)和白蛋白紫杉醇(200mg,第2天)方案治疗(免疫联合化疗组)。化疗组和免疫联合化疗组的年龄分别为(66.8±8.4)岁和(65.8±6.8)岁(P>0.05);术后病理分期T_(2)期伴淋巴结阳性分别为3例(8.3%)和3例(8.8%),T_(3~4a)期伴淋巴结阳性分别为6例(16.7%)和12例(35.3%),T_(3~4a)期不伴淋巴结阳性分别为27例(75.0%)和19例(55.9%)(P>0.05);肿瘤直径≥3cm分别为30例(83.3%)和10例(29.4%)(P>0.05),0.05)。采用Kaplan-Meier法和多因素Cox回归分析观察组与治疗组术后1、3年的总生存期(OS),以及化疗组与免疫联合化疗组术后1、3年的无病生存期(DFS)。采用美国卫生及公共服务部发布的常见不良事件评价标准分析化疗组和免疫联合化疗组的并发症。结果本研究中位随访时间18.4(8.2,34.7)个月,观察组和治疗组中位随访时间分别为19.0(8.3,35.2)个月和17.5(7.9,33.2)个月;术后1年总生存率分别为76.2%和90.0%,差异有统计学意义(χ^(2)=6.92,P=0.009);术后3年总生存率分别为57.8%和82.9%,差异有统计学意义(χ^(2)=13.22,P<0.01)。观察组中位OS为35.9个月,治疗组中位OS未达到,差异有统计学意义(HR=2.51,95%CI1.36~4.65,P=0.003)。化疗组和免疫联合化疗组的中位随访时间分别为10.7(7.4,22.1)个月和14.4(6.3,40.7)个月;术后1年无病生存率分别为67.6%和91.2%,差异有统计学意义(χ^(2)=4.60,P=0.032);术后3年无病生存率分别为88.2%和55.6%,差异有统计学意义(χ^(2)=8.37,P=0.004)。化疗组中位DFS为27.7个月,免疫联合化疗组中位DFS未达到,差异有统计学意义(HR=3.39,95%CI1.46~7.89,P=0.016)。治疗组并发症分级1级140例,2级39例,3级8例,4级2例,5级0例。化疗组和免疫联合化疗组均出现5例≥3级不良反应,其中化疗组为2例贫血,2例血小板计数降低,1例中性粒细胞降低;免疫联合化疗组为1例贫血,1例血小板计数降低,2例中性粒细胞降低,1例-谷氨酰胺转移酶增高。化疗组和免疫联合化疗组≥3级不良反应发生率分别为13.9%(5/36)和14.7%(5/34),差异无统计学意义(χ^(2)=0.01,P=0.922)。结论对于高复发进展风险MIBC患者,术后行辅助治疗可明显延长OS。对于铂类化疗不耐受,或拒绝铂类辅助化疗的患者,可采用免疫检查点抑制剂联合白蛋白紫杉醇方案,作为根治性膀胱切除术后的辅助治疗方案,具有较好的疗效和安全性,不良反应可耐受。

关键词：膀胱肿瘤肌层浸润性膀胱癌辅助化疗免疫检查点抑制剂毒性作用

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反应合金材料冲击释能机理研究进展

科学通报 2024年第9期69卷 1211-1222页

作者：何勇杨岩松何源郭磊孙志超王传婷南京理工大学机械工程学院南京210094

反应合金在高速撞击目标过程中会发生破碎,产生大量可燃碎片,其极速氧化释能特性可对目标产生力热化耦合毁伤.反应合金优良的力学性能和释能特性为其在高效毁伤战斗部上的应用提供了广阔前景.本文主要介绍反应合金冲击释能过程中3个需... 详细信息

反应合金在高速撞击目标过程中会发生破碎,产生大量可燃碎片,其极速氧化释能特性可对目标产生力热化耦合毁伤.反应合金优良的力学性能和释能特性为其在高效毁伤战斗部上的应用提供了广阔前景.本文主要介绍反应合金冲击释能过程中3个需要解决的问题及相关研究进展,即材料撞击目标后,材料破碎的机理和生成的碎片尺寸分布规律;碎片尺寸与冲击和绝热剪切产生的瞬态温度之间的关系;控制碎片发生化学反应的反应温度阈值和临界尺寸.本文还对未来的发展前景进行了概述.应用反应合金将有力提升弹药战斗部的威力,实现结构功能的一体化.

关键词：反应合金冲击破碎反应毁伤

Investigation and improvement of tiny spot defects on hot-dip galvanized automotive steel sheets

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Baosteel Technical Research 2024年第2期18卷 32-38页

作者： GE zhiyong yang Bo yang Jiwu Baosteel Zhanjiang Iron&Steel Co. Ltd.Zhanjiang 524072GuandongChina

The causes of tiny spot defects on the surface of hot-dip galvanized automotive steel sheets were studied using scanning electron microscopy(SEM)and energy dispersive spectrometer(EDS),and effective control measures were *** results show that rubbing against the top roller after galvanizing is easy due to the local thickness of tiny spot defect location coating;therefore,the surface morphology is different from the normal *** kinds of defects,namely zinc slag,small slivers,and pitting,are likely to cause local thickening of the coating after galvanizing,leading to the formation of tiny ***,resolving the three types of defects can effectively control the generation of tiny spot *** them,due to the hereditary nature of the small sliver defect,focusing on its control and supervision is necessary.

关键词： hot-dip galvanizing tiny spot zinc slag pitting small sliver

Nickel-modified In_(2)O_(3) with inherent oxygen vacancies for CO_(2) hydrogenation to methanol

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Science China Chemistry 2024年第5期67卷 1715-1728页

作者： Zixuan Zhou Yuchen Wang Yuanjie Bao Haiyan yang Jiong Li Chunran Chang Shenggang Li Peng Gao CAS Key Laboratory of Low-Carbon Conversion Science and Engineering Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai 201210China University of Chinese Academy of Sciences Beijing 100049China School of Physical Science and Technology ShanghaiTech UniversityShanghai 201210China Shanghai Synchrotron Radiation Facility Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai 201204China Shaanxi Key Laboratory of Low Metamorphic Coal Clean Utilization School of Chemistry and Chemical EngineeringYulin UniversityYulin 719000China

Methanol synthesis is one of the most important industrially-viable approaches for carbon dioxide(CO_(2)) utilization, as the produced methanol can be used as a platform chemical for manufacturing green fuels and chemicals. The In_(2)O_(3) catalysts are ideal for sustainable methanol synthesis and have received considerable attention. Herein, Co-, Ni-and Cu-modified In_(2)O_(3) catalysts were fabricated with high dispersion and high stability to improve the hydrogenation performance. The Ni-promoted In_(2)O_(3) catalyst in the form of high dispersion possessed the largest amount of oxygen vacancies and the strongest ability for H_(2) activation, leading to the highest CO_(2) conversion and space time yield of methanol of 0.390 g_(Me OH)g_(cat)^(-1)h^(-1) with CH_(3)OH selectivity of 68.7%. In addition, the catalyst exhibits very stable performance over 120 h on stream, which suggests the promising prospect for industrial applications. Further experimental and theoretical studies demonstrate that surface Ni doping promotes the formation of oxygen defects on the In_(2)O_(3) catalyst, although it also results in lower methanol selectivity. Surprisingly, subsurface Ni dopants are found to be more beneficial for methanol formation than surface Ni dopants, so the Nipromoted In_(2)O_(3)catalyst with a lower surface Ni content at the similar Ni loading can reach higher methanol selectivity and productivity. This work thus provides theoretical guidance for significantly improving the CO_(2) reactivity of In_(2)O_(3)-based catalysts while maintaining high methanol selectivity.

关键词： carbon dioxide hydrogenation methanol synthesis indium oxides Ni doping sites transition metal promoters