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基于Lamb波时间反转法的复合材料损伤检测

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中国机械工程 2021年第1期32卷 26-31,53页

作者：夏小松郑艳萍郑州大学机械与动力工程学院郑州450001

为检测复合材料损伤,利用Lamb波时间反转法的聚焦特性,在复合材料布置压电传感器激励和接收Lamb波。时间反转法无需对比基准信号就能快速准确地实现损伤的判别,提出的改进损伤成像方法可实现损伤情况可视化。实验研究验证了检测方法的... 详细信息

为检测复合材料损伤,利用Lamb波时间反转法的聚焦特性,在复合材料布置压电传感器激励和接收Lamb波。时间反转法无需对比基准信号就能快速准确地实现损伤的判别,提出的改进损伤成像方法可实现损伤情况可视化。实验研究验证了检测方法的有效性和改进损伤成像方法的优越性。

关键词： Lamb波时间反转法损伤成像复合材料健康监测

亚磷酸三苯酯调控聚乳酸/氯化铁共混体系的降解行为和性能

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材料研究学报 2021年第8期35卷 632-640页

作者：令狐昌开李小龙罗筑杨乐夏啸松贵州大学材料与冶金学院高分子材料工程系贵阳550025 贵州理工学院材料与能源工程学院贵阳550003

用熔融共混法制备了氯化铁(FeCl_(3))催化聚乳酸(PLA)快速降解材料。PLA材料降解的速率提高了10倍,但是PLA/FeCl_(3)在加工过程中分子量大幅度减小,使力学性能和可加工性能降低。为了减小PLA/FeCl_(3)在熔融加工中的过度降解,将有优良... 详细信息

用熔融共混法制备了氯化铁(FeCl_(3))催化聚乳酸(PLA)快速降解材料。PLA材料降解的速率提高了10倍,但是PLA/FeCl_(3)在加工过程中分子量大幅度减小,使力学性能和可加工性能降低。为了减小PLA/FeCl_(3)在熔融加工中的过度降解,将有优良扩链和增塑效果的亚磷酸三苯酯(TPPi)引入PLA/FeCl_(3)体系中,用熔融共混制备TPPi改性PLA/FeCl_(3)材料,使其具有一定的综合力学性能。通过碱溶液降解实验和多种测试研究了样品的降解速率和综合性能。结果表明,TPPi和FeCl_(3)的添加量之比为3∶1的P3-1样品性能最优,拉伸强度和弯曲强度分别达到43.78 MPa和99.04 MPa,在碱液中降解8d其质量损失率为65.76%,远大于纯聚乳酸的4.67%。含2.95 phr FeCl_(3)的样品能在碱液中产生高降解速率,加工时不发生过度降解,由此制备出一种可快速降解并保持良好力学性能的聚乳酸改性材料。

关键词：复合材料聚乳酸氯化铁亚磷酸三苯酯降解行为力学性能

凤眼莲(Eichhornia crassipes Solms)对染料色水脱色作用的初步研究

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环境科学学报 1987年第3期 353-360页

作者：夏晓松丁树荣南京大学环境科学研究所

经凤眼莲对染料色水的脱色作用静态试验表明,凤眼莲对阳离子、活性、直接、还原和酸性等染料有显著的脱色作用,其中对阳离子染料的脱色尤为有效,脱色率最高可达98％。还进行了小型动态实验,并建立了一个反映脱色率与进水色度、色水停留... 详细信息

经凤眼莲对染料色水的脱色作用静态试验表明,凤眼莲对阳离子、活性、直接、还原和酸性等染料有显著的脱色作用,其中对阳离子染料的脱色尤为有效,脱色率最高可达98％。还进行了小型动态实验,并建立了一个反映脱色率与进水色度、色水停留时间和凤眼莲生物量等参数间相关关系的数学模型。试验结果表明,凤眼莲的脱色作用具有酶促反应的若干特点,Ca2+、Mn2+等离子的存在可使脱色率显著提高。

关键词：凤眼莲染料色水脱色作用

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PVA纤维对再生透水混凝土的性能影响研究

非金属矿 2018年第6期41卷 98-100页

作者：黄军福王福胜周敬勇崔辉夏晓松合肥职业技术学院建筑工程学院安徽巢湖238000 安徽皖维高新材料股份有限公司安徽巢湖238000

以两种粒径(9.5~16.0 mm和4.75~9.5 mm)再生粗骨料掺比1∶1为基准,比较了干法和湿法两种掺加方式对PVA纤维分散性的影响。通过设计正交试验研究了纤维的掺加量、长度和分散剂对其在透水混凝土中的分散性及透水混凝土性能的影响规律。结... 详细信息

以两种粒径(9.5~16.0 mm和4.75~9.5 mm)再生粗骨料掺比1∶1为基准,比较了干法和湿法两种掺加方式对PVA纤维分散性的影响。通过设计正交试验研究了纤维的掺加量、长度和分散剂对其在透水混凝土中的分散性及透水混凝土性能的影响规律。结果表明:PVA纤维掺加量和长度对分散效果影响显著,对力学性能改善较为明显,纤维掺加量为0.1%(体积分数),长度为6 mm时,抗压和劈裂抗拉强度分别达到9.01 MPa和1.91 MPa。此外,3个因素对透水系数影响均不明显。

关键词：再生骨料透水混凝土 PVA纤维分散性强度透水性正交试验

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有线传输设备的节能降耗技术研究

通信电源技术 2024年第4期41卷 101-103页

作者：洪军夏小松杨星星章跃王钦中国移动通信集团设计院有限公司江苏分公司江苏南京210003

主要探讨有线传输设备在现代通信系统中的节能降耗技术及其应用。介绍有线传输设备的种类与工作原理,详细分析主要的节能降耗技术,如能效优化的传输技术、动态能源管理系统、高效编码和信号处理,并探讨这些节能降耗技术在数据中心、宽... 详细信息

主要探讨有线传输设备在现代通信系统中的节能降耗技术及其应用。介绍有线传输设备的种类与工作原理,详细分析主要的节能降耗技术,如能效优化的传输技术、动态能源管理系统、高效编码和信号处理,并探讨这些节能降耗技术在数据中心、宽带网络系统和移动通信基站中的实际应用。重点介绍有线传输设备节能降耗技术的创新,包括智能调制与解调技术、能量回收与再利用技术和低能耗材料与设备设计,旨在促进通信行业的可持续发展。

关键词：有线传输设备节能降耗技术通信系统

Understanding solid-gas and solid-liquid interfaces through near ambient pressure X-ray photoelectron spectroscopy

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Wuli Huaxue Xuebao/ Acta Physico - Chimica Sinica 2025年第2期41卷 14-31页

作者： Liu, Chongjing xia, Yujian Zhang, Pengjun Wei, Shiqiang Cao, Dengfeng Sheng, Beibei Chu, Yongheng Chen, Shuangming Song, Li Liu, xiaosong National Synchrotron Radiation Laboratory CAS Center for Excellence in Nanoscience University of Science and Technology of China Hefei 230026 China School of Nuclear Science and Technology University of Science and Technology of China Hefei 230027 China Institute of Energy Hefei Comprehensive Nation Science Center Hefei 230031 China

The surface of energy material is the direct place where energy storage and conversion reactions occur. Thus, the surface chemistry and the structure of the material under real reaction conditions are the key descriptors to clarify the reaction mechanism. However, such surfaces are usually immersed in gaseous or liquid environments under real reaction conditions, so it is not a simple task to identify the real physical and chemical properties of the interface under in situ conditions. X-ray photoelectron spectroscopy (XPS), as a surface-sensitive technique, is one of the main techniques for studying complex composition and electronic structure of material surfaces. However, due to the limited mean free path of photoelectrons in gas, liquid and solid media, the traditional XPS is confined to vacuum conditions, which poses a significant obstacle for studying solid-gas and solid-liquid interfaces under in situ conditions. With the introduction of differentially pumped analyzers and electrostatic lenses system, this limitation no longer restricts XPS only suitable for ultra-high vacuum conditions. With the active development of synchrotron radiation sources worldwide, near ambient pressure X-ray photoelectron spectroscopy (NAP-XPS) offers advanced features combined with the benefits of synchrotron radiation sources. Compared to traditional X-ray source, synchrotron radiation sources have significantly higher photon flux and much smaller spot size, which enables more electrons to escape to the electron analyzer, therefore can effectively improve the signal-to-noise ratio and the maximum working pressure, and the continuous wavelength tunability of synchrotron radiation makes experimental measurements more flexible and provides more information on the surface reaction. Over the years, NAP-XPS has rapidly emerged as an influential tool for investigating various solid-gas and solid-liquid interfaces, reflecting the importance of understanding reaction mechanisms and structu

关键词： Energy material Near ambient pressure Solid-gas interface Solid-liquid interface Synchrotron radiation X-ray photoelectron spectroscopy

In Situ Inducing Spinel/Rock Salt Phases to Stabilize Ni-Rich Cathode via Sucrose Heat Treatment

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Energy Material Advances 2023年第1期4卷 262-271页

作者： xiaosong Zhang Mengyuan Wang Ziyin Guo Chunhua Chen Ya-Jun Cheng Yonggao xia Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences1219 Zhongguan West RoadZhenhai DistrictNingboZhejiang Province 315201P.R.China University of Chinese Academy of Sciences 19A Yuquan RdShijingshan DistrictBeijing 100049P.R.China Nano Science and Technology Institute University of Science and Technology of China166 Renai RdSuzhou215123Jiangsu ProvinceP.R.China Department of Chemistry College of SciencesShanghai UniversityShanghai 200444P.R.China University of Science and Technology of China 96 Jinzhai RoadHefei 230026Anhui ProvinceP.R.China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences19A Yuquan RdShijingshan DistrictBeijing 100049P.R.China

Nickel-rich cathode materials have attracted widespread interest due to their high capacity;however,the structure is prone to degradation and collapse during cycling,resulting in poor stability performance and safety,hindering the development of high-nickel cathode ***,we propose a straightforward method to consume oxygen on the surface of primary particles during the high-temperature calcination process of precursors,inducing the coupled rearrangement of surface cations,resulting in the in situ generation of a nano-sized mixed spinel/rock salt defect phase,which is confirmed by high-angle annular dark-field scanning transmission electron ***_(0.8)Co_(0.1)Mn_(0.1)O_(2) modified with mixed phase not only can reduce side reactions with the electrolyte,resulting in fewer by-products such as LiF and Li2CO3,preventing the formation of excessively thick cathode-electrolyte interface layers,but also can avoid irreversible phase transitions and prevents lattice *** a result,the cycling performance has been improved to some extent,benefiting from structural *** addition,the special 3-dimensional structure of the spinel phase allows the material surface to expand ion transport channels and enhance multiplicative ***,this study provides a new perspective on the modification of highnickel materials and extends the application of nickel-rich materials.

关键词： cycling nickel electrolyte

LRP1B suppresses HCC progression through the NCSTN/PI3K/AKT signaling axis and affects doxorubicin resistance

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Genes & Diseases 2023年第5期10卷 2082-2096页

作者： xiangyu Zhai Zhijia xia Gang Du Xinlu Zhang Tong xia Delin Ma xiaosong Li Bin Jin Hao Zhang Department of Hepatobiliary Surgery The Second Hospital of Shandong UniversityJinanShandong 250033China Department of General Visceraland Transplant SurgeryLudwig-Maximilians-University MunichMunich 81377Germany Department of Reproductive Medicine Central Hospital Affiliated to Shandong First Medical UniversityJinanShandong 250013China Organ Transplant Department Qilu Hospital of Shandong UniversityJinanShandong 250012China Clinical Molecular Medicine Testing Center The First Affiliated Hospital of Chongqing Medical UniversityChongqing 400016China

Accumulating evidence supports the association of somatic mutations with tumor occurrence and *** aimed to identify somatic mutations with important implications in hepatocellular carcinoma(HCC)and explore their possible *** gene mutation profiles of HCC patients were assessed,and the tumor mutation burden was *** mutations closely associated with tumor mutation burden and patient overall survival were *** vivo and in vitro experiments were performed to verify the effects of putative genes on proliferation,invasion,drug resistance,and other malignant biological behaviors of tumor *** genes with a high mutation frequency were *** mutation status of 12 of these genes was closely related to the mutation *** these 12 genes,LRP1B mutation was closely associated with patient *** genes were associated with immune cell *** results of in vivo and in vitro experiments showed that the knockdown of LRP1B promotes tumor cell proliferation and migration and enhances the resistance of tumor cells to liposomal ***1B could directly bind to NCSTN and affect its protein expression level,thereby regulating the PI3K/AKT *** mutational analysis revealed complex and orchestrated liposomal alterations linked to doxorubicin resistance that may also render cancers less susceptible to immunotherapy and also provides new treatment alternatives.

关键词： Doxorubicin Hepatocellular carcinoma LRP1B PI3K/AKT pathway Tumor mutation burden

The evolution of local structure of Mo6S8 during Li+ electrochemical storage studied by in-situ tender X-ray absorption spectroscopy

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Progress in Natural Science:Materials International 2022年第6期32卷 739-744页

作者： Pengfei Yu Yujian xia Xuefei Feng Shun Zheng Guoxi Ren Nian Zhang xiaosong Liu Cheng Chen xiangxin Guo State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information Technology Chinese Academy of Sciences National Synchrotron Radiation Laboratory University of Science and Technology of China University of Chinese Academy of Sciences Tianmu Lake Institute of Advanced Energy Storage Technologies School of Physical Science and Technology Shanghai Tech University Shanghai BYD Co. Ltd. College of Physics Qingdao University

Chevrel phase Mo6S8has attracted great interest because of its capability to accommodate different types of small cations through reversible topotactic redox ***,the intercalation mechanism of Mo6S8is still far from being fully understood owing to the complexity of the crystal structure and limitation of the probe *** our study,the reaction mechanism of Li+intercalation into Mo6S8was studied as a model by in-situ tender X-ray absorption spectroscopy（itXAS） in the viewpoint of local *** to the isobestic points of the 1st derivative,the discharge process is divided into five regions while the charge process is divided into four regions,where most of the regions are assigned to the two-phase transition *** intensity change of the two spectroscopic features of the 1st derivative is found to be correlated,implying that the intercluster bond length directly affects the localization of the unoccupied states of the intracluster *** asymmetric evolution of the intensity of a' and b' as well as the asymmetric partition of reaction regions demonstrate the asymmetry of the reaction path in discharge and charge *** results help to clarify the remaining debates on the phase ***,itXAS is demonstrated to be a powerful tool to study the reaction mechanism of *** is complementary to NMR,XRD and so on.

关键词： Chevrel phases Cathode materials X-ray absorption In-situ measurement Local structure