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Deep tectonics and seismogenic mechanisms of the seismic source zone of the Jishishan M_(s)6.2 earthquake on December 18,2023,at the northeast margin of the Tibetan Plateau

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Earth and Planetary Physics 2024年第3期8卷 514-521页

作者： Qiong Wang shuyu li XinYi li Yue Wu PanPan Zhao Yuan Gao Key Laboratory of Earthquake Prediction Institute of Earthquake ForecastingChina Earthquake AdministrationBeijing 100036China Institute of Geophysics China Earthquake AdministrationBeijing 100081China

On December 18,2023,an M_(s)6.2 earthquake occurred in Jishishan,Gansu Province,*** earthquake happened in the eastern region of the Qilian Orogenic Belt,which is situated at the forefront of the NE margin of the Tibetan Plateau(i.e.,Qinghai-Tibet Plateau),encompassing a rhombic-shaped area that intersects the Qilian-Qaidam Basin,Alxa Block,Ordos Block,and South China *** this study,we analyzed the deep tectonic pattern of the Jishishan earthquake by incorporating data on the crustal thickness,velocity structure,global navigation satellite system(GNSS)strain field,and *** discovered that the location of the earthquake was related to changes in the crustal *** results showed that the Jishishan M_(s)6.2 earthquake occurred in a unique position,with rapid changes in the crustal thickness,Vp/Vs,phase velocity,and S-wave *** epicenter of the earthquake was situated at the transition zone between high and low velocities and was in proximity to a low-velocity ***,the source area is flanked by two high-velocity anomalies from the east and *** principal compressive strain orientation near the Lajishan Fault is primarily in the NNE and NE directions,which align with the principal compressive stress direction in this *** some areas of the Lajishan Fault,the principal compressive strain orientations show the NNW direction,consistent with the direction of the upper crustal fast-wave polarization from local earthquakes and the phase velocity azimuthal *** features underscore the relationship between the occurrence of the Jishishan M_(s)6.2 earthquake and the deep inhomogeneous structure and deep tectonic *** NE margin of the Tibetan Plateau was thickened by crustal extension in the process of northeastward expansion,and the middle and lower crustal materials underwent structural deformation and may have been filled with salt-containing fluids during the extension *** presence

关键词： Jishishan M_(s)6.2 earthquake crustal structure anisotropy stress and strain seismogenic mechanism northeast margin of the Tibetan Plateau

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Shifts in intrinsic neural timescale of hippocampus support the maturation of inhibitory control and working memory in youth

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Medicine in Novel Technology and Devices 2024年第2期22卷 115-123页

作者： Debin Zeng Qiongling li Deyu li shuyu li Beijing Advanced Innovation Center for Biomedical Engineering School of Biological Science&Medical EngineeringBeihang UniversityBeijing100083China State Key Laboratory of Cognitive Neuroscience and Learning Beijing Normal UniversityBeijing100875China Beijing Key Laboratory of Brain Imaging and Connectomics Beijing Normal UniversityBeijing100875China IDG/McGovern Institute for Brain Research Beijing Normal UniversityBeijing100875China State Key Laboratory of Virtual Reaility technology and Systems Beihang UniversityBeijing100083China

The intrinsic neural timescale(INT)provides temporal windows in brain activity that process information of different durations,crucial for the integration and segregation of external inputs and ultimately shaping cognition and *** research has uncovered a pronounced INT hierarchy along the adult hippocampus's long***,the development of INT organization within the hippocampus—particularly the pattern of its hierarchical structure and its impact on cognitive development—has not been thoroughly investigated in ***,we discovered that the INT distribution in youth presents a distinct hierarchical structure along both posterioranterior and proximal-distal axes of the ***,this hierarchical structure correlates signifi-cantly with the first principal gradient of the hippocampal-cortical functional connectome and the thickness of hippocampal grey ***,we observed notable changes in the hippocampal INT landscape during youth,characterized by a general narrowing of timescales,alongside dedifferentiation along the hippocampal organizational *** maturational changes significantly link to improvements in inhibitory control and working memory ***,our findings reveal the developmental patterns of temporal integration and segregation hierarchies within hippocampus,and highlights the profound significance of INT as a neural underpinning that orchestrates cognitive growth.

关键词： Intrinsic neural timescale Hippocampus Development Inhibitory control and working memory

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Recent advances of mechanosensitive genes in vascular endothelial cells for the formation and treatment of atherosclerosis

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Genes & Diseases 2024年第3期11卷 206-219页

作者： shuyu li Zichen Xu Yi Wang lizhao Chen Xiangxiu Wang Yanghao Zhou Daoxi Lei Guangchao Zang Guixue Wang Key Laboratory of Biorheological Science and Technology of Ministry of Education National and Local Joint Engineering Laboratory for Vascular ImplantsBioengineering College of Chongqing UniversityChongqing 400030China College of Basic Medical Sciences Chongqing Medical UniversityChongqing 400016China Department of Neurosurgery Daping HospitalArmy Medical Center of PLAArmy Medical UniversityChongqing 400042China

Atherosclerotic cardiovascular disease and its complications are a high-incidence disease *** studies have shown that blood flow shear has a huge impact on the function of vascular endothelial cells,and it plays an important role in gene regulation of pro-inflammatory,pro-thrombotic,pro-oxidative stress,and cell *** impor-tant endothelial cell mechanosensitive genes have been discovered,including KLK10,CCN gene family,NRP2,YAP,TAZ,HIF-1α,NF-kB,FOS,JUN,TFEB,KLF2/KLF4,NRF2,and *** of them have been intensively studied,whereas the relevant regulatory mechanism of other genes remains *** on these mechanosensitive genes will provide new strategies for therapeutic intervention in atherosclerotic vascular ***,this article reviews the mechanosensitive genes affecting vascular endothelial cells,including classical pathways and some newly screened genes,and summarizes the latest research progress on their roles in the pathogenesis of atherosclerosis to reveal effective therapeutic targets of drugs and provide new insights foranti-atherosclerosis.

关键词： Atherosclerosis Blood flow Endothelial cell Mechanosensitive gene Therapeutic target

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NIR-II Organic Photothermal Cocrystals with Strong Charge Transfer Interaction for Flexible Wearable Heaters

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Chinese Journal of Chemistry 2024年第14期42卷 1563-1570页

作者： Dong Zhang shuyu li Shaosong Gao Siyao Fu Kexin liu Dan He Huapeng liu Xiaotao Zhang Wenping Hu Key Laboratory of Organic Integrated Circuit Ministry of Education&Tianjin Key Laboratory of Molecular Optoelectronic SciencesDepartment of ChemistryInstitute of Molecular Aggregation ScienceTianjin UniversityTianjin300072 China Key Laboratory of Organic Integrated Circuits Ministry of Education&Tianjin Key Laboratory of Molecular Optoelectronic SciencesDepartment of ChemistrySchool of ScienceTianjin UniversityTianjin300072 China Joint School of National University of Singapore and Tianjin University International Campus of Tianjin UniversityFuzhouFujian350207 China College of Chemistry and Chemical Engineering Central South UniversityChangshaHunan410083 China

The organic cocrystal strategy has provided a convenient and efficient platform for preparing organic photothermal ***,the rapidly directional preparation of cocrystals with desirable photothermal properties remains challenging due to a lack of suitable design ***,two new photothermal cocrystals,MTC and MFC,based on acceptor molecules(TCNQ and F4TCNQ)with different electron-withdrawing capacities were quickly prepared by the coprecipitation method,aiming to explore the effect of charge transfer(CT)interaction on photothermal *** with MTC,the stronger intermolecular CT interaction in MFC facilitates extending the absorption range(from the NIR-I to the NIR-II region)and enhancing the non-radiative transition *** the 808 nm laser irradiation,the photothermal conversion efficiency(PCE)of MFC is 54.6%,whereas MTC displays a mere 36.8%.The MFC cocrystal was further combined with a flexible polymer substrate(HPDMS)to prepare a flexible wearable heater(HPDMS@MFC),which exhibits excellent NIR-II photothermal *** work points out a research direction for the rapid assembly of efficient photothermal cocrystals and additionally provides an extensive application prospect for organic photothermal cocrystals in the field of wearable devices.

关键词： Organic photothermal cocrystals Charge transfer NiR-II region Density functional calculations Flexible wearable heaters Crystal engineering Orbital hybridization Fluorides

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Highly crystalline,highly stable n-type ultrathin crystalline films enabled by solution blending strategy toward organic single-crystal electronics

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Chinese Chemical Letters 2024年第1期35卷 321-325页

作者： Yang liu shuyu li Yihan Zhang Xiaoting Zhu Fangxu Yang Fei Jiao Wenping Hu Tianjin Key Laboratory of Molecular Optoelectronic Sciences Department of ChemistrySchool of ScienceTianjin UniversityTianjin 300072China Haihe Laboratory of Sustainable Chemical Transformations Tianjin 300192China

The development of n-type semiconductor is still far behind that of p-type semiconductor on account of the challenges in enhancing carrier mobility and environmental ***,by blending with the polymers,n-type ultrathin crystalline thin film was successfully prepared by the method of meniscus-guided ***,the n-type crystalline films exhibit ultrathin thickness as low as 5 nm and excellent mobility of 1.58 cm^(2) V^(-1) s^(-1),which is outstanding in currently reported organic n-type ***,the PS layer provides a high-quality interface with ultralow defect which has strong resistance to external interference with excellent long-term stability,paving the way for the application of n-type transistors in logic circuits.

关键词： n-type organic field effect transistors Ultrathin film High-performance Composites

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不同涂覆配方对缸内直喷发动机颗粒物捕集器性能的影响

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柴油机设计与制造 2024年第3期30卷 28-33页

作者：李树宇奇瑞汽车股份有限公司安徽芜湖241007

为探讨不同涂覆配方对缸内直喷(GDI)发动机在颗粒物捕集器试验中的性能影响,采用台架标定系统PUMA软件对某GDI发动机不同涂覆颗粒物捕集器样件(GPF-A、GPF-B)进行台架试验,试验中未对发动机进行任何改动。试验结果表明:GPF-A、GPF-B的... 详细信息

为探讨不同涂覆配方对缸内直喷(GDI)发动机在颗粒物捕集器试验中的性能影响,采用台架标定系统PUMA软件对某GDI发动机不同涂覆颗粒物捕集器样件(GPF-A、GPF-B)进行台架试验,试验中未对发动机进行任何改动。试验结果表明:GPF-A、GPF-B的压差基本一致;在颗粒物捕集器温度为650℃下,随着氧流量的增加,GPF-A、GPF-B的燃烧速率均明显升高,且在相同氧流量下,GPF-A的燃烧速率较高;在氧质量流量为500 mg/s下,随着颗粒物捕集器温度的增加,GPF-A、GPF-B的燃烧速率均明显升高,且GPF-A的燃烧速率较高;GPF-A、GPF-B在700℃断油后的内部温度场变化较为一致,GPF-A在断油18 s后从初始温度710℃上升到最高温度960℃,而GPF-B在断油24 s后从初始温度705℃上升到最高温度942℃;发动机在台架中等负荷(70%额定负荷)、中等转速(3 000 r/min)的工况下运行相同时间,GPF-A捕集的载碳量较小,说明在此工况下,GPF-B的捕集效率优于GPF-A。

关键词：缸内直喷发动机颗粒物捕集器燃烧速率性能台架标定

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在WLTC工况下不同驾驶模式对轻型车高原排放特性的影响

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柴油机设计与制造 2024年第1期30卷 30-35页

作者：李树宇奇瑞汽车股份有限公司安徽芜湖241000

为研究在高原和平原地区的不同驾驶模式对全球轻型车统一测试循环(WLTC)工况下污染物排放特性的影响,针对搭载汽油缸内直喷(GDI)发动机的动力总成,在高原和平原实验室内采用底盘测功机进行WLTC工况行驶测试。结果表明:在不同驾驶模式下... 详细信息

为研究在高原和平原地区的不同驾驶模式对全球轻型车统一测试循环(WLTC)工况下污染物排放特性的影响,针对搭载汽油缸内直喷(GDI)发动机的动力总成,在高原和平原实验室内采用底盘测功机进行WLTC工况行驶测试。结果表明:在不同驾驶模式下,高原与平原地区的CO排放量相差不大,均为国六b排放法规限值的40%左右;在高原地区经济模式下CO相对排放量较平原略有升高,在运动模式和正常模式下CO相对排放量略有下降;相对于平原地区,不同驾驶模式下高原地区的总碳氢化合物(THC)、非甲烷碳氢化合物(NMHC)排放情况整体表现较好,均为国六b排放法规限值的65%左右,其中运动和经济模式下THC、NMHC相对排放量均略有降低,正常模式下THC与NMHC的相对排放量增幅超过8%;相对于平原地区,在高原地区运动模式下,氮氧化物(NOx)相对排放量的增幅达到23.7%,正常模式次之,达到11.4%;与平原地区相比,3种驾驶模式下高原地区颗粒物(PM)和颗粒数(PN)排放均有所降低,正常模式下PM相对排放量降幅最大(30.6%),经济模式下PN相对排放量降幅最大(13.3%);低速时段是不同驾驶模式下污染物排放量占比最大的阶段,也是进行排放物改进优化的关键阶段。

关键词：轻型车驾驶模式排放特性全球轻型车统一测试循环(WLTC)

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五指毛桃水提液制备泡腾片工艺优化

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食品工业科技 2024年第8期45卷 200-207页

作者：杨琳江蓉倩张杭颖李树玉武马璐张君诚三明学院资源与化工学院药用植物开发利用福建省高校工程研究中心福建三明365000

为研究五指毛桃泡腾片制备工艺,以水为溶剂,超声辅助提取五指毛桃中活性成分,采用高效液相色谱质谱联用技术(HPLC-MS/MS)测定提取物种类,通过单因素实验和正交试验优化五指毛桃泡腾片配方。结果表明,五指毛桃水提液检测到433种物质,种... 详细信息

为研究五指毛桃泡腾片制备工艺,以水为溶剂,超声辅助提取五指毛桃中活性成分,采用高效液相色谱质谱联用技术(HPLC-MS/MS)测定提取物种类,通过单因素实验和正交试验优化五指毛桃泡腾片配方。结果表明,五指毛桃水提液检测到433种物质,种类最多的三种物质分别是羧酸及其衍生物(103种)、脂肪酰基(45种)和苯及其取代衍生物(36种)。主要活性成分糖类23种(含量6.71%),黄酮9种(含量0.22%),酚类16种(含量1.65%),香豆素类化合物5种(含量0.51‰),苯丙素类9种。五指毛桃泡腾片最佳制备工艺条件为:25%五指毛桃水提液干粉,50%崩解剂(柠檬酸与碳酸氢钠质量比为1:1.5),20%甘露醇,5%PEG-6000。此工艺条件下制得的五指毛桃泡腾片溶液呈棕黄色,且澄清透明,口感酸甜适口,对DPPH自由基的清除率IC50为1.65 mg/mL。五指毛桃水提液制备泡腾片含有丰富的活性成分且具备抗氧化活性。

关键词：五指毛桃水提液活性成分泡腾片制备工艺

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A Differentially Private Data Aggregation Method Based on Worker Partition and Location Obfuscation for Mobile Crowdsensing

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Computers, Materials & Continua 2020年第4期63卷 223-241页

作者： shuyu li Guozheng Zhang School of Computer Science Shaanxi Normal UniversityXi’an710119China

With the popularity of sensor-rich mobile devices,mobile crowdsensing(MCS)has emerged as an effective method for data collection and ***,MCS platform usually need workers’precise locations for optimal task execution and collect sensing data from workers,which raises severe concerns of privacy *** to preserve workers’location and sensing data from the untrusted MCS platform,a differentially private data aggregation method based on worker partition and location obfuscation(DP-DAWL method)is proposed in the ***-DAWL method firstly use an improved K-means algorithm to divide workers into groups and assign different privacy budget to the group according to group size(the number of workers).Then each worker’s location is obfuscated and his/her sensing data is perturbed by adding Laplace noise before uploading to the *** the stage of data aggregation,DP-DAWL method adopts an improved Kalman filter algorithm to filter out the added noise(including both added noise of sensing data and the system noise in the sensing process).Through using optimal estimation of noisy aggregated sensing data,the platform can finally gain better utility of aggregated data while preserving workers’*** experiments on the synthetic datasets demonstrate the effectiveness of the proposed method.

关键词： Mobile crowdsensing data aggregation differential privacy K-means kalman filter

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海上平台火灾人员疏散路线优化研究

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中国安全生产科学技术 2024年第3期20卷 141-148页

作者：李舒羽曹杨盖文妹崔永强中国地质大学(北京) 北京100083 中海油研究总院有限责任公司北京100028 中海石油(中国)有限公司天津分公司辽东作业公司天津300450

为分析海上平台发生火灾时作业人员安全疏散情况,对应急疏散提出路径优化建议,使用PyroSim还原海上平台火源被引燃后的烟气蔓延规律,研究烟气温度、能见度、CO体积分数随时间的变化情况,选择各参数最快到达极限值的时刻作为作业人员的... 详细信息

为分析海上平台发生火灾时作业人员安全疏散情况,对应急疏散提出路径优化建议,使用PyroSim还原海上平台火源被引燃后的烟气蔓延规律,研究烟气温度、能见度、CO体积分数随时间的变化情况,选择各参数最快到达极限值的时刻作为作业人员的可用安全疏散时间。利用Pathfinder将不同场景的火灾情况与作业人员疏散进行耦合,对疏散情况进行综合分析后得到作业人员逃离危险位置所用的必需疏散时间。研究结果表明:钻井区空间和走廊2风险系数较高。研究结果可对不同初始位置作业人员疏散路径提出优化建议。

关键词：海上平台火灾疏散作业人员路径优化

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