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Nano Research 2023年第8期16卷 11303-11311页

作者： Yifan Gu Zhiguang Qiu Simu Zhu hao Lu Lisha Peng Gaofan Zhang Ziyi Wu Xuchun Gui Zong Qin Bo-ru Yang State Key Laboratory of Optoelectronic Materials and Technologies Guangdong Province Key Laboratory of Display Material and TechnologySchool of Electronics and Information TechnologySun Yat-Sen UniversityGuangzhou 510006China

Stretchable transparent electrode(STE)plays a key role in numerous emerging applications as an indispensable component for future stretchable *** embedded STE,as a promising candidate,possesses balanced performances and facile preparation ***,it still suffers from the defects of conductive materials caused by the transferring,which results in the irreversible failure of *** this work,a patternable silver nanowire(AgNW)STE was fabricated by a plasma-enhanced cryo-transferring(PEC-transferring)*** to the plasma-induced sintering,the AgNW network obtained remarkable improvement in robustness,which ensured the intact network after transferring and thus led to superior tensile electrical properties of the ***,serpentine patterns were utilized to optimize the tensile electrical properties of the STE,which achieved a figure of merit of 292.8 and 150%resistance changing under 50%*** a practical application,a 4×3 array of the mutual-capacitive type stretchable touch sensors was demonstrated for future touch sensors in stretchable *** PEC-transferring process opened a new avenue for patternable embedded STEs and exhibited its high potential in wearable electronics and the Internet of Thing devices.

关键词： stretchable transparent electrode silver nanowire plasma treatment transferring process serpentine

Microstructure and microhardness of a novel TiZrAlV alloy by laser gas nitriding at different laser powers

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Rare Metals 2020年第3期39卷 270-278页

作者： Zhi-hao Feng Xin-Yang Sun Peng-Biao Han Hang Fu Hui-Cong Dong Shun Guo ru Su Jian-Hui Li Hebei Key Laboratory of Material Near-net Forming Technology Hebei University of Science and TechnologyShijiazhuang050000China Hebei Engineering Laboratory of Aviation Lightweight Composite Materials and Processing Technology Hebei University of Science and TechnologyShijiazhuang050000China State Key Laboratory of Metastable Materials Science and Technology Yanshan UniversityQinhuangdao066004China School of Materials Science and Engineering Jiangsu UniversityZhenjiang212013China

The Ti-20Zr-6.5Al-4V(T20Z,wt%)alloy surface was treated by the process of laser surface *** evolution of microstructures and microhardness has been investigated by changing the laser power parameter from 120 to 240 *** laser-treated T20Z samples show two regions with distinctly different microstructural features,as compared with the untreated substrate:dense TiN dendrites and(α+β)-Ti(remelting zone,RMZ),nanoscaleαlaths doped with part of p phase(heat-affected zone,HAZ).The formation of TiN dendrites can be analyzed by a series of complex reactions during the process of melting and *** increase in laser power results in the increase in content of TiN dendrite which is mainly due to the increase in energy *** HAZ,the self-quenching effect leads to the formation of nanoscale a laths and the residue ofβ*** profile of different regions was measured from the surface to the interior,and the highest microhardness was obtained(~HV 916.8)in the RMZ,as the laser power was set to 240 *** the present study,we explained various microstructural characteristics induced by laser surface nitriding treatment.

关键词： TiZrAlV alloy Laser surface nitriding Microstructure TiN dendrites Microhardness

A non-invasive diagnostic method of cavity detuning based on a convolutional neural network

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Nuclear Science and Techniques 2022年第7期33卷 25-35页

作者： Liu-Yuan Zhou hao Zha Jia-ru Shi Jia-Qi Qiu Chuan-Jing Wang Yun-Sheng Han Huai-Bi Chen Department of Engineering Physics Tsinghua UniversityBeijing100084China Key Laboratory of Particle and Radiation Imaging Tsinghua UniversityBeijing100084China

As modern accelerator technologies advance toward more compact sizes,conventional invasive diagnostic methods of cavity detuning introduce negligible interference in measurements and run the risk of harming structural *** overcome these difficulties,this study developed a non-invasive diagnostic method using knowledge of scattering parameters with a convolutional neural network and the interior point *** construction and training of the neural network led to remarkable results on three typical acceleration structures:a 13-cell S-band standing-wave linac,a 12-cell X-band traveling-wave linac,and a 3-cell X-band RF *** trained networks significantly reduced the burden of the tuning process,freed researchers from tedious tuning tasks,and provided a new perspective for the tuning of side-coupling,semi-enclosed,and total-enclosed structures.

关键词： Cavity detuning Convolutional neural network Equivalent circuit

Design,fabrication,and testing of an X-band 9-MeV standing-wave electron linear accelerator

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Nuclear Science and Techniques 2023年第7期34卷 219-230页

作者： Jian Gao hao Zha Jia-ru Shi Qiang Gao Xian-Cai Lin Fang-Jun Hu Qing-Zhu Li Huai-Bi Chen Department of Engineering Physics Tsinghua UniversityBeijing 100084China Key Laboratory of Particle and Radiation Imaging(Tsinghua University) Ministry of EducationBeijing 100084China

In this study,an X-band standing-wave biperiodic linear accelerator was developed for medical radiotherapy that can accel-erate electrons to 9 MeV using a 2.4-MW *** structure works atπ/2 mode and adopts magnetic coupling between cavities,generating the appropriate adjacent mode separation of 10 *** accelerator is less than 600-mm long and constitutes four bunching cells and 29 normal *** optimizations,full-scale radiofrequency(RF)simulations,and beam dynamics calculations were *** accelerator was fabricated and examined using a low-power RF *** cold test results showed a good agreement with the simulation and actual measurement *** the high-power RF test,the output beam current,energy spectrum,capture ratio,and spot size at the accelerator exit were *** the input power of 2.4 MW,the pulse current was 100 mA,and the output spot root-mean-square radius was approximately 0.5 *** output kinetic energy was 9.04 MeV with the spectral FWHM of 3.5%,demonstrating the good performance of this accelerator.

关键词： Standing-wave accelerating structure RF analysis Thermal DC gun Low-power RF test High-power experiment

CYFIP1对结直肠癌细胞HT29增殖和凋亡的影响

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中国药理学通报 2025年第1期41卷 116-121页

作者：余富龙李亮强昊袁慧王松程晓虎江闰犇杨雅茹刘志宁安徽医科大学第二附属医院普外科安徽合肥230000 安徽医科大学安徽合肥230032 安徽医科大学第二附属医院药物临床实验研究中心安徽合肥230000

目的分析CYFIP1(cytoplasmic FMR1-interacting protein-1,CYFIP1)在结直肠癌中的表达水平,并探究敲低CYFIP1对结直肠癌细胞HT29增殖与凋亡的影响及其可能机制。方法通过免疫组化实验检测32例结直肠癌组织及对应癌旁组织中CYFIP1的表达... 详细信息

目的分析CYFIP1(cytoplasmic FMR1-interacting protein-1,CYFIP1)在结直肠癌中的表达水平,并探究敲低CYFIP1对结直肠癌细胞HT29增殖与凋亡的影响及其可能机制。方法通过免疫组化实验检测32例结直肠癌组织及对应癌旁组织中CYFIP1的表达水平;通过GEPIA2数据库筛选共表达基因,预测二者相关性及可能结合位点;构建siRNA-CYFIP1后,分别用CCK-8、细胞凋亡荧光Hoechst 33342/PI双染实验和Western blot分别检测HT29细胞的增殖、凋亡水平以及细胞凋亡相关蛋白表达水平的变化。结果免疫组化结果显示结直肠癌组织中CYFIP1的表达水平明显高于其对应的癌旁组织(P<0.05);CYFIP1的表达与患者的年龄、性别无关,与TNM分期,淋巴结转移相关(P<0.05);利用GEPIA2、JASPAR数据库和rVista 2.0启动子预测软件在CYFIP1基因上游的3kbps的DNA区域预测了一个保守的TP53结合位点;HT29转染siRNA-CYFIP1后,细胞增殖能力均明显降低(P<0.05);HT29转染siRNA-CYFIP1后细胞凋亡相关蛋白cleaved caspase-3水平升高,caspase-3,Bcl-2的表达水平降低(P<0.05),这可能与CYFIP1与TP53相互作用有关。结论CYFIP1在结直肠癌中高表达,与TNM分期,以及淋巴结转移相关,敲低CYFIP1后可以抑制结直肠癌细胞HT29的增殖、影响相关凋亡蛋白表达。

关键词：结直肠癌 CYFIP1 凋亡增殖 HT29 小分子干扰RNA

Dynamic mechanical characteristics of deep Jinping marble in complex stress environments

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Journal of Rock Mechanics and Geotechnical Engineering 2024年第2期16卷 630-644页

作者： Chendi Lou Heping Xie ru Zhang Hai Ren hao Luo Kun Xiao Yuan Peng Qiang Tan Li Ren Institute for Disaster Management and Reconstruction Sichuan UniversityChengdu610207China College of Water Resource&Hydropower Sichuan UniversityChengdu610065China MOE Key Laboratory of Deep Earth Science&Engineering Sichuan UniversityChengdu610065China Yalong River Hydropower Development Company Ltd.Chengdu610051China (Chongqing)International Engineering Technology Company Ltd.Chongqing401121China

To reveal the dynamic mechanical characteristics of deep rocks,a series of impact tests under triaxial static stress states corresponding to depths of 300-2400 m were *** results showed that both the strain rates and the stress environments in depth significantly affect the mechanical characteristics of *** sensitivity of strain rate to the dynamic strength and deformation modulus shows a negative correlation with depth,indicating that producing penetrative cracks in deep environments is more difficult when damage *** dynamic strength shows a tendency to decrease and then increase slightly,but decreases sharply *** demonstrates a similar trend as that of strength,whereas reflectivity indicates the opposite ***,two critical depths with high dynamically induced hazard possibilities based on the China Jinping Underground Laboratory(CJPL)were proposed for deep *** first critical depth is 600-900 m,beyond which the sensitivity of rock dynamic characteristics to the strain rate and restraint of circumferential stress decrease,causing instability of surrounding rocks under axial stress *** second one lies at 1500-1800 m,where the wave impedance and dynamic strength of deep surrounding rocks drop sharply,and the dissipation energy presents a negative *** suggests that the dynamic instability of deep surrounding rocks can be divided into dynamic load dominant and dynamic load induced types,depending on the second critical depth.

关键词： Rock mechanics Split-Hopkinson pressure bar Coupled static‒dynamic loading Different depths Holmquist-Johnson-Cook(HJC)model

Observation of Two-Level Critical State in the Superconducting FeTe Thin Films

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Chinese Physics Letters 2019年第7期36卷 94-97页

作者： hao ru Yi-Shi Lin Yin-Cong Chen Yang Feng Yi-Hua Wang Department of Physics and State Key Laboratory of Surface Physics Fudan University

FeTe, a non-superconducting parent compound in the iron-chalcogenide family, becomes superconducting after annealing in oxygen. Under the presence of magnetism, spin-orbit coupling, inhomogeneity and lattice distortion,the nature of its superconductivity is not well understood. Here we combine the mutual inductance technique with magneto transport to study the magnetization and superconductivity of FeTe thin films. It is found that the films with the highest TC show non-saturating superfluid density and a strong magnetic hysteresis distinct from that in a homogeneous superconductor. Such a hysteresis can be well explained by a two-level critical state model and suggests the importance of granularity to superconductivity in this compound.

关键词： a non-superconducting iron-chalcogenide superconductivity in this compound

Revealing the interfacial electron modulation effect of CoFe alloys with CoC_(X) encapsulated in N-doped CNTs for superior oxygen reduction

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Advanced Powder Materials

Advanced Powder Materials 2022年第3期1卷 11-17页

作者： Jing Sun Niankun Guo Tianshan Song Yi-ru hao Jiawen Sun Hui Xue Qin Wang College of Chemistry and Chemical Engineering Inner Mongolia UniversityHohhot010021PR China

Rationally designing and developing robust and durable electrocatalytic materials for oxygen reduction/evolution are essential for metal-air ***,an effective approach is proposed to fabricate high-performance electrocatalysts based on CoFe alloy and CoC_(X) nanoparticles sandwiched in nitrogen-doped carbon *** preparation of CoFe-CoC_(X)@NCNT is achieved by the calcination of CoFe_(2)O_(4) spinel and dicyandiamide under reducing *** CoFe-CoC_(X)@NCNT catalyst exhibits remarkable oxygen reduction reaction(ORR)performance with the onset and half-wave potential of 1.01 V and 0.89 V,respectively,exceeding the commercial Pt/C ***,the Zn-air battery using CoFe-CoC_(X)@NCNT as air cathode shows a power density of 175 mW cm-2,which is also higher than that of the industrial Pt/C t ruO_(2).The super electrocatalytic performance is attributed to the multiple heterointerface and strong coupling effect among CoFe,CoC_(X),and NCNT,which can regulate conductivity and electron structure of the *** study supplies a practical strategy to exploit active and low-cost catalytic material for Zn-air batteries,and presents an in-depth insight into the designing of efficient green energy storage devices.

关键词： Electronic structure Interfacial Synergistic effect Oxygen reduction Zinc-air battery

Analytic RF design of a linear accelerator with a SLED-Ⅰ type RF pulse compressor

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Nuclear Science and Techniques 2020年第11期31卷 12-22页

作者： Jia-Yang Liu Jia-ru Shi hao Zha Alexej Grudiev Ping Wang Ying-Chao Du Huai-Bi Chen Department of Engineering Physics Tsinghua UniversityBeijing 100084China Key Laboratory of Particle and Radiation Imaging(Tsinghua University) Ministry of EducationBeijing 100084China European Organization for Nuclear Research(CERN) 1211 GenevaSwitzerland

This study presents the RF design of a linear accelerator(linac)operated in single-bunch *** accelerator is powered by a compressed RF pulse produced from a SLED-I type RF pulse *** compressed RF pulse has an unflattened shape with a gradient distribution which varies over the structure *** analytical study to optimize the accelerating structure together with the RF pulse compressor is *** optimization aims to maximize the efficiency by minimizing the required RF power from the generator for a given average accelerating *** study shows that,owing to the compressed RF pulse shape,the constant-impedance structure has a similar efficiency to the optimal structure using varying iris *** constant-impedance structure is easily fabricated and is favorable for the design of a linac with a pulse *** utilize these findings to optimize the RF design of a X-band linac using the constant-impedance accelerating structure for the Tsinghua Thomson X-ray source facility.

关键词： X-band linac High gradient structure RF pulse compressor Thomson X-ray source Single-bunch mode

The Stereocomplex Formation and Phase Separation of PLLA/PDLA Blends with Different Optical Purities and Molecular Weights

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Chinese Journal of Polymer Science 2015年第12期33卷 1713-1720页

作者： Jun Shao Yan-long Liu Sheng Xiang Xin-chao Bian Jing-ru Sun 李杲陈学思 hao-qing Hou College of Chemistry and Chemical Engineering Jiangxi Normal University Key Laboratory of Polymer Ecomaterials Changchun Institute of Applied Chemistry Chinese Academy of Sciences

In this study, the poly（L-lactide）/poly（D-lactide）（PLLA/PDLA） blends with different optical purities of PLLA and various molecular weights of PDLA are prepared by solution mixing, and the stereocomplex formation and phase separation behaviors of these blends are investigated. Results reveal that optical purity and molecular weight do not vary the crystal structure of PLA stereocomplex （sc） and homochiral crystallites （hc）. As the optical purity increasing in the blends, the melting temperature of sc （Tsc） and the content of sc （AHsc） increased, while the melting temperature of hc （Thin） hardly changes, although the content ofhc （AHhm） decreased gradually. The Tsc and AHsc are also enhanced as the molecular weight of PDLA reduces, and the AHhm reduces rapidly even though the Thin does not vary apparently. With lower optical purities of PLLA and higher molecular weights of PDLA, three types of crystals form in the blends, i.e., PLA sc, PLLA hc and PDLA hc. As molecular weight decreases and optical purity enhances, the crystal phase decreases to two （sc and PDLA hc）, and one （sc） finally. This investigation indicates that the phase separation behavior between PLLA and PDLA in the PLLA/PDLA blends not only depends on molecular weights, but also relies on the optical purities of polymers.

关键词： Poly(L-lactide) Poly(D-lactide) Poly(lactide) stereocomplex Homocrystallites Phase separation.