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First-principles investigation of the significant anisotropy and ultrahigh thermoelectric efficiency of a novel two-dimensional Ga_(2)I_(2)S_(2) at room temperature

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International Journal of Extreme Manufacturing 2022年第2期4卷 100-112页

作者： Zheng Chang Ke Liu Zhehao Sun Kunpeng Yuan shuwen cheng Yufei Gao Xiaoliang Zhang Chen Shen Hongbin Zhang Ning Wang Dawei Tang Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education School of Energy and Power EngineeringDalian University of TechnologyDalian 116024People’s Republic of China Research Office of Propulsion Technology Expace Technology Corporation LimitedBeijing 100176People’s Republic of China Research School of Chemistry Australian National UniversityCanberraACT 2601Australia School of Metallurgy Northeastern UniversityShenyang 100819People’s Republic of China Institut fur Materialwissenschaft Technische Universitat DarmstadtDarmstadt 64283Germany School of Physics University of Electronic Science and Technology of ChinaChengdu 610054People’s Republic of China

Two-dimensional(2D)thermoelectric(TE)materials have been widely developed;however,some 2D materials exhibit isotropic phonon,electron transport properties,and poor TE performance,which limit their application ***,exploring excellent anisotropic and ultrahigh-performance TE materials are very ***,we first investigate the phonon thermal and TE properties of a novel 2D-connectivity ternary compound named *** paper comprehensively studies the phonon dispersion,phonon anharmonicity,lattice thermal conductivity,electronic structure,carrier mobility,Seebeck coefficient,electrical conductivity,and the dimensionless figure of merit(ZT)versus carrier concentration for 2D Ga_(2)I_(2)S_(2).We conclude that the in-plane lattice thermal conductivities of Ga_(2)I_(2)S_(2) at room temperature(300 K)are found to be 1.55 W mK^(−1) in the X-axis direction(xx-direction)and 3.82 W mK^(−1)in the Y-axis direction(yy-direction),which means its anisotropy ratio reaches ***,the TE performance of p-type and n-type doping 2D Ga2I2S2 also shows significant anisotropy,giving rise to the ZT peak values of p-type doping in xx-and yy-directions being 0.81 and 1.99,respectively,and those of n-type doping reach ultrahigh values of 7.12 and 2.89 at 300 K,which are obviously higher than the reported values for p-type and n-type doping ternary compound Sn2BiX(ZT∼1.70 and∼2.45 at 300 K)(2020 Nano Energy 67104283).This work demonstrates that 2D Ga_(2)I_(2)S_(2) has high anisotropic TE conversion efficiency and can also be used as a new potential room-temperature TE material.

关键词： thermoelectricity strong anisotropy two-dimensional materials room temperature first-principles calculation

Machine learning accelerated calculation and design of electrocatalysts for CO_(2) reduction

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SmartMat 2022年第1期3卷 68-83页

作者： Zhehao Sun Hang Yin Kaili Liu shuwen cheng Gang Kevin Li Sibudjing Kawi Haitao Zhao Guohua Jia Zongyou Yin Research School of Chemistry Australian National UniversityCanberraAustralian Capital TerritoryAustralia Department of Chemical and Biomolecular Engineering National University of SingaporeSingapore Department of Chemical Engineering The University of MelbourneMelbourneVictoriaAustralia Materials Interfaces Center Shenzhen Institutes of Advanced TechnologyChinese Academy of SciencesShenzhenChina Curtin Institute of Functional Molecules and Interfaces School of Molecular and Life SciencesCurtin UniversityWestern AustraliaAustralia

In the past decades,machine learning(ML)has impacted the field of *** researchers have begun to take advantage of ML‐based data‐driven techniques to overcome the computational and experimental limitations to accelerate rational catalyst ***,significant efforts have been made to perform ML to accelerate calculation and aid electrocatalyst design for CO_(2) *** review discusses recent applications of ML to discover,design,and optimize novel ***,insights into ML aided in accelerating calculation are ***,ML aided in the rational design of the electrocatalyst is introduced,including establishing a data set/data source selection and validation of descriptor selection of ML algorithms validation and predictions of the ***,the opportunities and future challenges are summarized for the future design of electrocatalyst for CO_(2) reduction with the assistance of ML.

关键词： CO_(2)reduction reaction DFT calculation electrocatalyst machine learning rational design

Survival benefit after radiotherapy for patients with malignant pleural mesothelioma:A propensity score-matched study

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Survival benefit after radiotherapy for patients with malign...

Radiotherapy in Gastric Cancer Patients with Liver Metastases:A Propensity Score-Matched SEER Database Analysis

2022CCTB中国肿瘤标志物学术大会暨中国整合肿瘤学大会暨第十六届肿瘤标志物青年科学家论坛暨中国肿瘤标志物产业创新大会

作者： Liyou Lian shuwen cheng Rujie Zheng Hongxia Yao Jinfei Chen Tianhui Chen First Affiliated Hospital of Wenzhou Medical University Nanjing University Medical School Cancer Hospital of the University of Chinese Academy of Sciences (Zhejiang Cancer Hospital)

Background:Malignant pleural mesothelioma(MPM) is an aggressive cancer with dismal *** radiotherapy is commonly used to treat malignant tumors,survival benefits after radiotherapy for MPM patients remains ***,we aimed to evaluate survival benefits after radiotherapy for MPM *** and Methods:Data on MPM patients were extracted from the Surveillance,Epidemiology,and End Results(SEER) *** bias between the radiotherapy and no-radiotherapy groups was minimized using propensity score matching(PSM).Kaplan-Meier(KM) and Cox proportional hazard models were used to explore the therapeutic role of radiotherapy presented with hazard ratio(HR) and 95% confidence intervals(CI).Results:Overall 7,299 patients with microscopically confirmed primary MPM were extracted for further analyses and among them,803(11%) underwent *** found the radiotherapy group had statistically significant higher median overall survival(OS),compared to the group without radiotherapy(12 months vs.8 months,respectively;HR:0.868,95% CI 0.785-0.961) and after adjustment for PSM,the statistical significance remained(HR:0.874,95% CI:0.789-0.968).We found reduced OS after radiotherapy for MPM patients with lung metastases(2 months vs.8 months,respectively;HR:2.446,95% CI1.303-4.592).Additionally,patients in a combination of radiotherapy with surgery had better OS compared with surgery alone(19 months vs.13 months,respectively;HR:0.758,95CI%:0.659-0.872).We also found that the OS in combination with surgery,chemotherapy and radiotherapy group significantly improved,compared to radiotherapy with chemotherapy or with surgery(20 months vs.11 months;HR:0.612,95% CI:0.518-0.722).Conclusion:We found radiotherapy prolonged the OS for MPM patients,though radiotherapy should be administered with caution for MPM patients with metastases.

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Radiotherapy in Gastric Cancer Patients with Liver Metastase...

Survival benefit after radiotherapy for pancreatic ductal adenocarcinoma patients with liver metastases:A propensity score-matched study

2022CCTB中国肿瘤标志物学术大会暨中国整合肿瘤学大会暨第十六届肿瘤标志物青年科学家论坛暨中国肿瘤标志物产业创新大会

作者： Liyou Lian shuwen cheng Rujie Zheng Hongxia Yao Tianhui Chen Jinfei Chen First Affiliated Hospital of Wenzhou Medical University Nanjing University Medical School Department of Radiology the First Affiliated Hospital of Wenzhou Medical University Department of Cancer Prevention/Zhejiang Cancer Institute Cancer Hospital of the University of ChineseAcademy of Sciences(Zhejiang Cancer Hospital) Department of Oncology First Affiliated Hospital of Wenzhou Medical University

Background and purpose:Gastric cancer with liver metastases(GCLM) remains a challenge in clinical *** purpose of the study was to access the therapeutic role of radiotherapy in GCLM patients in the Surveillance,Epidemiology,and End Results(SEER) *** and methods:Data on GCLM patients were extracted from the SEER *** score matching(PSM) was used to minimize bias between radiotherapy and no-radiotherapy *** therapeutic role of radiotherapy was evaluated by comparing Kaplan-Meier(KM) curves and Cox proportional hazard models presented with hazard ratio(HR) and 95% confidence intervals(CI).Results:A total of 2300 patients with microscopically confirmed GCLM were extracted from the database,including 356 patients who received radiotherapy that was 1:1 PSM with patients who did not receive *** patients could not benefit from radiotherapy(HR:1.08,95% CI:0.93-1.26,P= 0.33).Multivariate analyses revealed receiving surgery,chemotherapy and low grade were protective prognostic *** median overall survival(OS) time of radiotherapy and no-radiotherapy groups were both 7 months(P > 0.05).The median OS time of chemotherapy with radiotherapy was shorter than those chemotherapy alone(8 months,95% CI 8-10 months versus 10 months,95% CI 9-12 months,P > 0.05).The median OS time of surgery with radiotherapy was similar to those with surgery alone(11months,95% CI 8-17 months versus 11 months,95% CI 6-22 months,P > 0.05).Conclusion:Radiotherapy is not associated with better prognosis in GCLM *** combined with chemotherapy or surgery does not prolong the OS.

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Survival benefit after radiotherapy for pancreatic ductal ad...

2022CCTB中国肿瘤标志物学术大会暨中国整合肿瘤学大会暨第十六届肿瘤标志物青年科学家论坛暨中国肿瘤标志物产业创新大会

作者： Liyou Lian shuwen cheng Rujie Zheng Hongxia Yao Tianhui Chen Jinfin Chen First Affiliated Hospital of Wenzhou Medical University Nanjing University Medical School Department of Radiology the First Affiliated Hospital of Wenzhou Medical University Department of Cancer Prevention/Zhejiang Cancer Institute Cancer Hospital of the University of Chinese Academy of Sciences (Zhejiang Cancer Hospital) Department of Oncology First Affiliated Hospital of Wenzhou Medical University

Background:Pancreatic ductal adenocarcinoma(PDAC) patients are commonly metastasized to the liver,which are extremely *** radiotherapy is commonly used to treat metastatic tumors,survival benefits after radiotherapy for PDAC patients with liver metastases remains ***,we aimed to evaluate survival benefits after radiotherapy for PDAC patients with liver ***:Data on PDAC patients with liver metastasis were extracted from the Surveillance,Epidemiology,and End Results(SEER) *** bias between radiotherapy and no-radiotherapy groups was minimized using propensity score matching(PSM).Kaplan-Meier and Cox proportional hazard models were used to explore the therapeutic role of radiotherapy presented with hazard ratio(HR) and 95% confidence intervals(CI).Results:Overall,12,945 PDAC patients with liver metastasis were extracted from the SEER database,including 473 patients who underwent radiotherapy(1:1 matched with patients without radiotherapy).We found that PDAC patients with liver metastasis receiving radiotherapy alone could significantly prolong the OS(HR:0.78,95% CI:0.682-0.882,P<0.001) or receiving radiotherapy in combination with either surgery or chemotherapy could also prolong the OS(HR:0.752,95% CI:0.661-0.855,P<0.001;HR:0.784,95% CI0.689-0.892,P= 0.008,respectively).Radiotherapy appeared to prolong the OS(with median OS increasing from 1 month to 4 months).Additionally,we found that several protective prognostic factors including younger age,low stage,and receiving chemotherapy and surgery(all P<0.001).Conclusions:PDAC patients with liver metastases could benefit from radiotherapy alone or in combination with either surgery or chemotherapy,suggesting radiotherapy was most effective for PDAC patients with liver metastases,especially for younger age(< 65 year),low stage,and receiving chemotherapy and surgery.

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隧洞开挖下的边坡变形灰色预测分析

河南水利与南水北调 2023年第7期52卷 72-73页

作者：程书文河南省水利第二工程局河南郑州450016

隧洞是常见的水利工程结构形式。在开挖过程中受施工条件和受力形式变化的影响,隧洞进出口边坡会产生一定的变形,一旦变形过大,会对工程安全造成不利影响。及时监测和预测边坡变形具有重要的工程意义。针对隧洞开挖过程中的边坡变形预... 详细信息

隧洞是常见的水利工程结构形式。在开挖过程中受施工条件和受力形式变化的影响,隧洞进出口边坡会产生一定的变形,一旦变形过大,会对工程安全造成不利影响。及时监测和预测边坡变形具有重要的工程意义。针对隧洞开挖过程中的边坡变形预测问题,引入灰色预测模型,通过构建经典灰色预测的GM(1,1)模型,基于实测点位的变形数据,对未来的变形趋势进行预测。选取某输水隧洞实例进行分析,在该隧洞开挖的进出口边坡上设置若干监测点,记录监测点的水平、垂直位移数据,采用文章提出的灰色预测模型对监测点位的变形进行预测,并将预测值和实测值进行对比。结果表明预测的位移量与真实的位移量相差较小,误差均在5%以内,可以较好地实现隧洞开挖过程中边坡位移的预测,具有较高的预测精度。提出的边坡变形灰色预测分析模型可以较好实现隧洞开挖下的变形预测,方法简单实用,可为隧洞开挖过程中的变形控制提供技术支持,可在类似工程中推广应用。

关键词：隧洞开挖边坡变形预测 GM(1,1)模型

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极性润滑剂对滑石粉填充PP性能的影响

工程塑料应用 2020年第5期48卷 149-155页

作者：刘乐文程书文姜向新上海金发科技发展有限公司上海201714 上海工程塑料功能化工程技术研究中心上海201714 金发科技股份有限公司企业技术中心广州510520

以滑石粉(Talc)填充聚丙烯(PP)为研究对象,引入了两种不同结构的酰胺类极性润滑剂,其结构分别为AB(A代表极性锚固基团;B代表长支链或直链烷烃)型和BAB型,考察了两者对PP/Talc复合材料力学性能和流变行为的影响,同时借助仪器化冲击,着重... 详细信息

以滑石粉(Talc)填充聚丙烯(PP)为研究对象,引入了两种不同结构的酰胺类极性润滑剂,其结构分别为AB(A代表极性锚固基团;B代表长支链或直链烷烃)型和BAB型,考察了两者对PP/Talc复合材料力学性能和流变行为的影响,同时借助仪器化冲击,着重研究了极性润滑剂对材料冲击过程中裂纹产生功和裂纹扩展功的影响。结果表明,润滑剂的引入对流变行为影响较小,随着润滑剂添加量的增加,复合材料的熔体流动速率有所提高,加工性能改善,弯曲弹性模量和断裂伸长率有小幅度升高。BAB型润滑剂对PP/Talc复合材料具有更优异的增韧作用,实验范围内低温(0℃)缺口冲击强度最高提高了35%,冲击韧性提升主要得益于裂纹扩展功的增加。此外,扫描电子显微镜结果显示,BAB润滑剂的引入有利于改善Talc在PP基体中的分散均匀性,从而提高复合材料的冲击韧性。

关键词：聚丙烯滑石粉极性润滑剂仪器化冲击冲击强度

相容剂对LLDPE/PET共混材料性能的影响

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塑料 2017年第3期46卷 39-42,46页

作者：贾鹏飞程书文薛峰何和智黄思淇华南理工大学聚合物新型成型装备国家工程研究中心聚合物成型加工工程教育部重点实验室广东广州510640

选用不同相容剂对LLDPE/PET共混材料进行增容改性,研究了不同相容剂对LLDPE/PET共混材料力学性能、热性能、流变性能和微观形貌的影响。结果表明:相容剂的加入,能够明显提升共混材料的力学性能,当相容荆含量为3%时,拉伸强度比未加相容... 详细信息

选用不同相容剂对LLDPE/PET共混材料进行增容改性,研究了不同相容剂对LLDPE/PET共混材料力学性能、热性能、流变性能和微观形貌的影响。结果表明:相容剂的加入,能够明显提升共混材料的力学性能,当相容荆含量为3%时,拉伸强度比未加相容剂时最大提升了25.4%,相容剂含量为9%时,冲击强度最大提升了156%。随着相容剂含量的增加,共混材料的熔体流动性逐渐降低,两相基体熔点向中间温度变化,LLDPE结晶温度和结晶度先减小后增大,过多的相容剂会起到成核剂的作用。微观形貌分析表明:相容剂能够降低分散相粒径大小,增加界面黏结性。综合来看,LLDPE-g-MAH对共混材料相容性的提升效果要优于LDPE-g-GMA。

关键词：相容剂共混材料力学性能热性能微观形貌

2020年达州市恶性肿瘤发病与死亡情况分析

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预防医学情报杂志 2024年第9期40卷 1088-1095,1103页

作者：吴伟侯英成姝雯达州市疾病预防控制中心四川达州635002 四川省疾病预防控制中心成都610041

目的了解2020年达州市居民恶性肿瘤发病与死亡状况,为制定达州市恶性肿瘤防控措施提供参考依据。方法通过国家肿瘤登记平台导出2020年达州市发病与死亡数据,使用SPSS 25.0、Excel 2016等软件进行整理分析,用描述性分析计算粗发病(死亡)... 详细信息

目的了解2020年达州市居民恶性肿瘤发病与死亡状况,为制定达州市恶性肿瘤防控措施提供参考依据。方法通过国家肿瘤登记平台导出2020年达州市发病与死亡数据,使用SPSS 25.0、Excel 2016等软件进行整理分析,用描述性分析计算粗发病(死亡)率、标化发病(死亡)率、0~74岁发病(死亡)累积率、发病(死亡)顺位等,率间的比较用χ^(2)检验,检验水准α=0.05。结果2020年达州市恶性肿瘤新发病例数15822例,粗发病率为242.36/10万,中标率为139.21/10万,世标率为137.42/10万,0~74累积率为15.90%,男女性别发病比为1.58∶1,发病前10位依次为肺癌、肝癌、食管癌、胃癌、结直肠癌、乳腺癌、子宫颈癌、子宫体癌、脑和神经系统肿瘤、胰腺癌。恶性肿瘤死亡10958例,粗死亡率167.85/10万,中标率91.19/10万,世标率90.84/10万,0~74岁累积率为10.38%,男女性别死亡比为2.07∶1,死亡前10位依次为肺癌、肝癌、食管癌、胃癌、结直肠癌、子宫颈癌、乳腺癌、胰腺癌、脑和神经系统肿瘤、口腔癌。结论达州市恶性肿瘤发病与死亡低于全国及四川省,男性发病与死亡显著高于女性,肺癌、肝癌、食管癌、胃癌、结直肠癌以及女性乳腺癌和子宫颈癌是影响达州市居民健康的主要癌种,应重点加强防治。

关键词：恶性肿瘤发病率死亡率达州