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Superior sodium and lithium storage in strongly coupled amorphous Sb2S3 spheres and carbon nanotubes

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International Journal of Minerals,Metallurgy and Materials 2021年第7期28卷 1194-1203页

作者： Qiong Jiang wen-qi zhang Jia-chang zhao Pin-hua Rao Jian-feng Mao School of Chemistry and Chemical Engineering Shanghai University of Engineering ScienceShanghai 201620China Institute for Superconducting and Electronic Materials Australian Institute for Innovative MaterialsUniversity of WollongongWollongongNew South WalesAustralia

A facile one-step strategy involving the reaction of antimony chloride with thioacetamide at room temperature is successfully de-veloped for the synthesis of strongly coupled amorphous Sb_(2)S_(3)spheres and carbon nanotubes(CNTs).Benefiting from the unique amorphous structure and its strongly coupled effect with the conductive network of CNTs,this hybrid electrode(Sb_(2)S_(3)@CNTs)exhibits remarkable sodi-um and lithium storage properties with high capacity,good cyclability,and prominent rate *** sodium storage,a high capacity of 814 mAh·g^(−1)at 50 mA·g^(−1)is delivered by the electrode,and a capacity of 732 mAh·g^(−1)can still be obtained after 110 *** up to 2000 mA·g^(−1),a specific capacity of 584 mAh·g^(−1)can be *** lithium storage,the electrode exhibits high capacities of 1136 and 704 mAh·g^(−1)at 100 and 2000 mA·g^(−1),***,the cell holds a capacity of 1104 mAh·g^(−1)under 100 mA·g^(−1)over 110 *** preparation and remarkable electrochemical properties make the Sb_(2)S_(3)@CNTs electrode a promising anode for both sodium-ion(SIBs)and lithium-ion batteries(LIBs).

关键词： amorphous antimony sulfide spheres carbon nanotubes sodium-ion batteries lithium-ion batteries electrochemical performance

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SiC界面热化学反应演化响应机理研究

空气动力学学报 2024年第4期42卷 96-104,I0002页

作者：曹盈菲叶致凡汤巨赵瑾文东升北京航空航天大学国际通用工程学院北京100191 北京航空航天大学航空科学与工程学院北京100191

超高温陶瓷是保障飞行器在极端热环境下安全服役的理想热防护材料之一,其中SiC组分由于其优异的力热性能已成为陶瓷基体或抗氧化涂层领域的研究热点。但由于目前尚未能清晰认知其在高温边界层内界面热响应演化的复杂机理,限制了其热防... 详细信息

超高温陶瓷是保障飞行器在极端热环境下安全服役的理想热防护材料之一,其中SiC组分由于其优异的力热性能已成为陶瓷基体或抗氧化涂层领域的研究热点。但由于目前尚未能清晰认知其在高温边界层内界面热响应演化的复杂机理,限制了其热防护性能设计的进一步提升。为在微观尺度上研究SiC复杂界面演化及热响应机制提供新的可能,采用基于反应力场的反应分子动力学模拟方法,模拟了SiC界面的高温演化过程,并探究了界面在温度和压强变化下的热响应机理,包括热氧化反应及升华等;计算了典型工况下SiC界面的氧化反应速率、升华速率及烧蚀速率,并将计算获得的烧蚀后退速率结果与文献实验结果进行了对比,发现误差在10%以内,进一步验证了该方法在材料界面热化学反应定量计算方面应用的可行性。

关键词：反应分子动力学高温界面 SiC 热防护材料烧蚀

光子计数CT微小血管增强现实手术导航在巨乳缩小术中的应用

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中华放射学杂志 2024年第5期58卷 539-540页

作者：王沄张文超张超张大明于扬赵喜齐广昌曾昂中国医学科学院北京协和医学院北京协和医院放射科北京100730 中国医学科学院北京协和医学院北京协和医院整形美容外科北京100032 西门子数字医疗科技(上海)有限公司上海200135

该文报道1例重度乳腺肥大患者,借助光子计数CT微小血管增强现实手术导航工作流进行术前乳腺细小动脉分支走行规划,成功完成巨乳缩小整形术。患者女,62岁,乳腺重度肥大伴Ⅱ度下垂,术前行光子计数细小动脉CT血管成像评估乳腺血供情况,结... 详细信息

该文报道1例重度乳腺肥大患者,借助光子计数CT微小血管增强现实手术导航工作流进行术前乳腺细小动脉分支走行规划,成功完成巨乳缩小整形术。患者女,62岁,乳腺重度肥大伴Ⅱ度下垂,术前行光子计数细小动脉CT血管成像评估乳腺血供情况,结合光子计数CT超高分辨率解析优势、三维全息仿生实景渲染技术,以及增强现实可视化手术技术手段将重建三维解剖信息图像投射至患者体表,完成细小动脉血供术前定位。术中结果显示乳头乳晕复合体供血良好,血管走行与CT影像及增强现实所见高度一致,手术效果满意。

关键词：体层摄影术,X线计算机光子计数CT 增强现实巨乳症

Superior effectiveness and acceptability of saliva samples for the detection of SARS-CoV-2 in China

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Biosafety and Health 2024年第2期6卷 88-91页

作者： Hui Yao Ying Shen Zhichao Liang Xiaoyu Xue Chenxi zhao Xiang Xu Yuxin Cai Yonghong Liu Wei zhang Yang Pan Xiaoli Wang Beijing Office of Global Health Beijing Center for Disease Prevention and ControlBeijing 100013China Institute for Infectious Disease and Endemic Disease Control Beijing Center for Disease Prevention and ControlBeijing 100013China National Key Laboratory of Intelligent Tracking and Forecasting for Infectious Diseases Beijing Ditan HospitalCapital Medical UniversityBeijing 100015China Center for Drug Evaluation National Medical Products AdministrationBeijing 100176China School of Public Health Capital Medical UniversityBeijing 100069China

In response to problems of poor sampling quality,low sensitivity,and high demand for medical personnel regarding the current severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)oropharyngeal(OP)swab sampling used in China,we aimed to evaluate the diagnostic performance and acceptability of saliva-based nucleic acid amplification tests(NAATs)in *** results showed that,using nasopharyngeal(NP)swab results as the gold standard,the overall sensitivities for saliva specimens and OP swabs were 93.3%and 85.0%,the specificities were 92.6%and 93.8%,*** results of an acceptability survey showed that the scores for saliva,OP,and NP samples were 9.46±1.69,8.11±2.42,and 4.58±3.82 out of 10,respectively,with significant differences among the three groups(P<0.05).With higher sensitivity,comparable specificity,and strong public preference,saliva-based NAATs represent a convenient and effective method for detecting SARS-CoV-2 in future epidemics.

关键词： SARS-CoV-2 Saliva sample Sensitivity Acceptability

广泛期小细胞肺癌一线免疫联合化疗后胸部巩固放疗研究进展

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中华肿瘤杂志 2024年第6期46卷 526-535页

作者：赵文王璐谢照亮宋亚男孟雪李际盛山东大学齐鲁医院肿瘤内科济南250012 山东第一医科大学附属肿瘤医院放疗科济南250117 山东大学齐鲁医学院济南250012

小细胞肺癌约占原发性支气管肺癌的13%~17%,因其生长速度快、恶性程度高、转移早及预后差等特点,约70%的患者在确诊时已发展为广泛期。虽然绝大多数广泛期小细胞肺癌患者对初始化疗敏感,但短期内局部复发及远处转移仍不可避免。免疫治... 详细信息

小细胞肺癌约占原发性支气管肺癌的13%~17%,因其生长速度快、恶性程度高、转移早及预后差等特点,约70%的患者在确诊时已发展为广泛期。虽然绝大多数广泛期小细胞肺癌患者对初始化疗敏感,但短期内局部复发及远处转移仍不可避免。免疫治疗时代的到来为攻克这一临床难题带来了曙光。目前,免疫检查点抑制剂联合化疗已经成为广泛期小细胞肺癌一线治疗新策略,有效延长了患者生存。尽管如此,患者初始系统治疗后胸部病灶复发风险仍然较高,胸部巩固放疗的加入能否改善当前现状,尚待明确。文章汇总了一线化疗联合免疫治疗后行胸部巩固放疗这一模式在广泛期小细胞肺癌中的最新研究进展,旨在为临床实践提供参考依据。

关键词：肺肿瘤小细胞肺癌广泛期免疫检查点抑制剂胸部巩固放疗

淬熄高度和空气分配比例对RQL燃烧室燃烧特性的影响

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上海交通大学学报 2024年第3期58卷 312-323页

作者：惠蕾刘爱虢吴小取张云杰曾文沈阳航空航天大学、航空发动机学院、辽宁省航空推进系统先进测试技术重点实验室沈阳110136

基于富油/淬熄/贫油(RQL)技术原理,设计一种燃气轮机低排放燃烧室.在保持燃烧室进口参数不变的前提下,研究不同淬熄结构高度及空气流量分配比例对燃烧室内流场、温度场及污染物生成特性的影响.结果表明:淬熄结构高度和空气分配比例是影... 详细信息

基于富油/淬熄/贫油(RQL)技术原理,设计一种燃气轮机低排放燃烧室.在保持燃烧室进口参数不变的前提下,研究不同淬熄结构高度及空气流量分配比例对燃烧室内流场、温度场及污染物生成特性的影响.结果表明:淬熄结构高度和空气分配比例是影响燃烧室燃烧性能的重要参数,随着淬熄结构高度的降低,燃烧室出口氮氧化物NO_(x)的排放量增加;随着富油区主燃孔与淬熄空气质量流量的空气分配比例降低,燃烧室出口NO_(x)的排放量先降低后增加,存在一个最佳的空气分配比例使NO_(x)排放量最低;热力型NO_(x)的生成量与温度高于1900 K的区域大小和最高燃气温度存在直接关系.基于此设计的燃烧室在所研究的工况下,最低NO_(x)排放量可低于35 mg/m^(3),达到了低污染燃烧室排放标准.

关键词：富油/淬熄/贫油燃烧室淬熄结构空气分配氮氧化物

Load-bearing characteristics and energy evolution of fractured rock masses after granite and sandstone grouting

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Journal of Central South University 2024年第8期31卷 2810-2825页

作者： WU Xu-kun zhao Guang-ming MENG Xiang-rui LIU Chong-yan LIU Zhi-xi HUANG Shun-jie zhang Qi-hang Key Laboratory of Safe and Effective Coal Mining Ministry of EducationAnhui University of Science and TechnologyHuainan 232001China National Key Laboratory of Safe Mining of Deep Coal and Environmental Protection Anhui University of Science and TechnologyHuainan 232001China Joint National-Local Engineering Research Centre for Safe and Precise Coal Mining Anhui University of Science and TechnologyHuainan 232001China

Experiments on grouting-reinforced rock mass specimens with different particle sizes and features were carried out in this study to examine the effects of grouting reinforcement on the load-bearing characteristics of fractured rock *** strength and deformation features of grouting-reinforced rock mass were analyzed under different loading manners;the energy evolution mechanism of grouting-reinforced rock mass specimens with different particle sizes and features was investigated;the energy dissipation ratio and post-peak stress decreasing rate were employed to evaluate the bearing stability of grouting-reinforced rock *** results show that the strength and ductility of granite-reinforced rock mass(GRM)under biaxial loading are higher than that of sandstone-reinforced rock mass(SRM)under uniaxial ***,the energy evolution characteristics of grouting-reinforced rock mass under uniaxial and biaxial loading mainly could be divided into early,middle,and late *** the early stage,total,elastic,and dissipation energies were quite small with flatter curves;in the middle stage,elastic energy increased rapidly,whereas dissipation energy increased slowly;in the late stage,dissipation energy increased *** energy dissipation ratio was used to represent the pre-peak plastic *** uniaxial loading,this ratio increased as the particle size increased and the pre-peak plastic deformation of grouting-reinforced rock mass became larger;under biaxial loading,it dropped as the particle size increased,and the pre-peak plastic deformation of grouting-reinforced rock mass became *** post-peak stress decline rate A_(v) was used to assess the post-peak bearing performance of grouting-reinforced rock *** uniaxial loading,parameter A_(v) exhibited reduction as the particle size kept increasing,and the ability of post-peak of grouting-reinforced rock mass to allow deformation development was greater,and the bearing capacity was greater;

关键词： grouting-reinforced rock mass particle size energy dissipation ratio post-peak stress decreasing rate load-bearing characteristics

拧紧力矩作用下螺栓预紧力的高保真有限元仿真与实验验证

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机械强度 2024年第4期46卷 809-815页

作者：钱进陈果寸文渊赵旭升张旭赵正大南京航空航天大学民航学院南京211106 南京航空航天大学通用航空与飞行学院溧阳213300 航空工业成都飞机工业(集团)有限责任公司成都610092

针对实际螺栓结构,研究螺栓在拧紧力矩作用下的有限元仿真方法,得出了拧紧力矩和螺栓预紧力之间的定量关系。首先,建立了带三维斜螺纹的螺栓几何模型,并且使用Hypermesh软件进行带螺纹的有限元网格划分,并定义相应的力学接触状态;然后,... 详细信息

针对实际螺栓结构,研究螺栓在拧紧力矩作用下的有限元仿真方法,得出了拧紧力矩和螺栓预紧力之间的定量关系。首先,建立了带三维斜螺纹的螺栓几何模型,并且使用Hypermesh软件进行带螺纹的有限元网格划分,并定义相应的力学接触状态;然后,利用Ansys Workbench软件对螺母下表面施加不同大小拧紧力矩来得到对应的轴向力的大小,从而得出拧紧力矩与螺栓拉力之间的函数关系;最后,设计了螺栓预紧力实验,并将实验、仿真结果以及理论公式计算结果三者进行对比验证。结果表明,与扭拉关系理论计算式相比,有限元仿真模型的计算结果与实验更为接近,能准确反映螺栓预紧过程。螺栓预紧高保真有限元模型为进一步精确分析螺栓拧紧时的力学机制提供了一种可行方法。

关键词：拧紧力矩螺栓预紧力扭拉关系高保真有限元仿真螺栓预紧力实验

A deep neural network surrogate modeling benchmark for temperature field prediction of heat source layout

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Science China(Physics,Mechanics & Astronomy) 2021年第11期64卷 78-107页

作者： Xianqi Chen Xiaoyu zhao Zhiqiang Gong Jun zhang Weien Zhou Xiaoqian Chen wen Yao College of Aerospace Science and Engineering National University of Defense TechnologyChangsha 410073China Defense Innovation Institute Chinese Academy of Military ScienceBeijing 100071China

The thermal issue is of great importance during the layout design of heat source components in systems engineering,especially for high functional-density *** analysis requires complex simulation,which leads to an unaffordable computational burden to layout optimization as it iteratively evaluates different *** modeling is an effective method for alleviating computation ***,the temperature field prediction(TFP)with complex heat source layout(HSL)input is an ultra-high dimensional nonlinear regression problem,which brings great difficulty to traditional regression *** deep neural network(DNN)regression method is a feasible way for its good approximation ***,it faces great challenges in data preparation for sample diversity and uniformity in the layout space with physical constraints and proper DNN model selection and training for good generality,which necessitates the efforts of layout designers and DNN *** advance this cross-domain research,this paper proposes a DNN-based HSL-TFP surrogate modeling task *** consideration for engineering applicability,sample generation,dataset evaluation,DNN model,and surrogate performance metrics are thoroughly *** are conducted with ten representative state-of-the-art DNN models.A detailed discussion on baseline results is provided,and future prospects are analyzed for DNN-based HSL-TFP tasks.

关键词： temperature field prediction of heat source layout (HSL-TFP) heat source layout dataset (HSLD) deep neural network surrogates baseline methods benchmark