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Journal of Advanced Ceramics 2024年第7期13卷 956-966页

作者： Cuiyan li Ruinan Gao Haibo Ouyang Tianzhan Shen Zihao Chen yanlei li Key Laboratory for Green Manufacturing&Functional Application of Inorganic Materials School of Materials Science and EngineeringShaanxi University of Science and TechnologyXi’an 710021China

To meet the emerging demands for thermal protection materials for hypersonic aircraft,developing porous ultrahigh-temperature ceramics with both robust mechanical properties and superior thermal insulation performance is a critical ***,we report novel porous(Ta_(0.2)Nb_(0.2)Ti_(0.2)Zr_(0.2)Hf_(0.2))C high-entropy carbide(PHEC)ceramics fabricated by a self-foaming method using commercially available metal chloride and furfuryl alcohol(FA)as *** PHEC ceramics are constructed of microspheres with a size of 2µm,leading to a high porosity of 91.3%and an interconnected *** microspheres consist of high-entropy carbide grains(20 nm),resulting in abundant interfaces and nanosized pores in the PHEC *** to its unique hierarchical structure,the prepared PHEC ceramics have outstanding compressive strength(28.1±2 MPa)and exceptionally low thermal conductivity(κT,0.046 W·m^(-1)·K^(-1))at room *** makes it a promising thermal insulation materials for ultrahigh temperature *** work provides a cost-effective and facile strategy for producing porous ultrahigh-temperature ceramics.

关键词： porous ceramics high-entropy carbides hierarchical structure thermal insulation self-foaming

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仿生超浸润界面传感技术在生物分析中的应用

分析试验室 2024年第2期43卷 168-178页

作者：孙梦雪赵泳森李延雷高中锋山东省高校界面反应与传感分析重点实验室济南大学化学化工学院济南250024

仿生超浸润界面材料是构建高灵敏度、高特异性生物传感器的一类新兴材料,广泛适用于环境监测、生物医药、食品分析等领域。本文介绍了4种典型的超浸润界面,包括超疏水界面、超亲水界面、超润滑界面以及图案化浸润性界面,总结了界面浸润... 详细信息

仿生超浸润界面材料是构建高灵敏度、高特异性生物传感器的一类新兴材料,广泛适用于环境监测、生物医药、食品分析等领域。本文介绍了4种典型的超浸润界面,包括超疏水界面、超亲水界面、超润滑界面以及图案化浸润性界面,总结了界面浸润性调控在电化学、荧光、可视化、表面增强拉曼和可穿戴检测器件等技术中的研究和最新进展,阐述了传感器构建机理和检测机制。最后,对仿生超浸润界面传感技术在生命分析应用中存在的问题和现存的挑战进行了总结和讨论。

关键词：浸润性生物传感技术仿生材料生物分析应用

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基于原型滤波器的OTFS通感一体信号技术

信号处理 2024年第8期40卷 1531-1543页

作者：王杰熊志薇陈军梁兴东李焱磊陈龙永南京信息工程大学电子信息工程学院江苏南京210044 中国科学院空天信息创新研究院北京100190 微波成像技术国家级重点实验室北京100190

随着无线技术的快速发展,无线设备呈现爆炸式增长趋势,导致频谱资源日益稀缺,雷达和通信频段不断重叠。为了避免无线通信和雷达感知之间的相互干扰,学术界广泛研究了通信感知一体化(Integrated Sensing and Communication,ISAC)技术,并... 详细信息

随着无线技术的快速发展,无线设备呈现爆炸式增长趋势,导致频谱资源日益稀缺,雷达和通信频段不断重叠。为了避免无线通信和雷达感知之间的相互干扰,学术界广泛研究了通信感知一体化(Integrated Sensing and Communication,ISAC)技术,并且重点关注了正交时频空(Orthogonal Time Frequency Space,OTFS)信号。OTFS信号具备实现无线通信与雷达感知一体化的潜力。然而,分数多普勒会抬高OTFS多普勒旁瓣,引起多普勒弥散效应,不仅在通信数据与通信数据之间、通信数据与雷达数据之间产生严重干扰,还将导致微弱目标被强目标旁瓣淹没,进而影响雷达探测概率和通信信道估计精度,恶化整体性能。针对分数多普勒导致的OTFS性能下降问题,提出了基于原型滤波器的OTFS通感一体化信号设计方法。通过原型滤波器调理多普勒旁瓣,在不显著损失多普勒分辨率的同时,抑制多普勒弥散效应,提升检测概率,降低误码率。针对OTFS互相关匹配滤波信道估计算法计算复杂度高等问题,进一步提出了利用恒虚警率(Constant False Alarm Rate,CFAR)检测进行信道估计的思路,在降低计算复杂度的同时,稳健检测出了同一时延、不同多普勒的多个目标,保障了信道估计和目标检测性能。依据理论分析和仿真实验可知,本文可将分数多普勒条件下的通信误码率降低2个数量级。

关键词：通感一体原型滤波器正交时频空信号处理

振镜激光飞行焊接技术在新能源储能模组生产中的应用研究

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电焊机 2024年第7期54卷 100-104,131页

作者：赵辛龙杨尚磊田嘉伟毕军航李岩磊上海工程技术大学材料工程学院上海201620 上海市激光智能制造及质量检测专业技术服务平台上海201620

随着新能源技术的不断进步,新能源储能模组装备的生产效率显得尤为重要。提出了一种基于振镜激光飞行焊接技术的解决方案。该方案通过设计连贯的生产设备,并引入振镜激光飞行焊接技术。振镜激光飞行焊接技术具有非接触性、高精度、动态... 详细信息

随着新能源技术的不断进步,新能源储能模组装备的生产效率显得尤为重要。提出了一种基于振镜激光飞行焊接技术的解决方案。该方案通过设计连贯的生产设备,并引入振镜激光飞行焊接技术。振镜激光飞行焊接技术具有非接触性、高精度、动态运行等优势,能够有效缩短加工时间,提高产品质量,降低人工成本,并推动新能源产业的发展。主要论述新能源储能模组的生产设备、生产工艺路线以及振镜激光飞行焊接的优势等,经过现场调试及工艺试验,掌握了振镜激光飞行焊接核心技术,实现了新能源储能模组的稳定高效应用。并验证了其在新能源储能模组生产过程中的可行性。

关键词：振镜激光焊接技术新能源储能模组工艺路线飞行焊接

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ENO1 expression and Erk phosphorylation in PDAC and their effects on tumor cell apoptosis in a hypoxic microenvironment

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Cancer Biology & Medicine 2022年第11期19卷 1598-1616页

作者： Huizhi Sun Jing Mo Runfen Cheng Fan li Yue li Yuhong Guo yanlei li Yanhui Zhang Xiaoyu Bai Yalei Wang Xueyi Dong Danfang Zhang Jihui Hao Tianjin Medical University Cancer Institute&Hospital National Clinical Research Center for CancerKey Laboratory of Cancer Prevention and TherapyTianjinTianjin's Clinical Research Center for CancerTianjin 300060China Department of Pathology Tianjin Medical UniversityTianjin300070China

Objective: Hypoxia is an important feature of pancreatic ductal adenocarcinoma(PDAC). Previously, we found that hypoxia promotes ENO1 expression and PDAC invasion. However, the underlying molecular mechanism was remains ***: The relationship between ENO1 expression and clinicopathological characteristics was analyzed in 84 patients with PADC. The effects of CoCl2-induced hypoxia and ENO1 downregulation on the apoptosis, invasion, and proliferation of PDAC cells were evaluated in vitro and in vivo. Hypoxia-and ENO1-induced gene expression was analyzed by transcriptomic ***: The prognosis of PDAC with high ENO1 expression was poor(P ling. Under hypoxic conditions, PDAC cells upregulated ENO1 expression, thereby accelerating ERK phosphorylation and inhibiting apoptosis(P limb ischemia ***: Hypoxia-induced ENO1 expression promotes ERK phosphorylation and inhibits apoptosis, thus leading to PDAC survival and invasion. These results suggest that ENO1 is a potential therapeutic target for PDAC.

关键词： Pancreatic cancer hypoxia ENOl apoptosis Erk phosphorylation

Microstructure characteristics and solidification behavior of wrought aluminum alloy 2024 rheo-diecast with self-inoculation method

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China Foundry 2012年第4期9卷 328-336页

作者： li yanlei li Yuandong li Chun Wu Huihui State Key Laboratory of Gansu Advanced Nonferrous Metal Materials Lanzhou University of TechnologyLanzhou 730050China Key Laboratory of Nonferrous Metal Alloys and Processing Ministry of EducationLanzhou University of TechnologyLanzhou 730050China

One important problem in casting wrought aluminum alloys is the high tendency to the formation of hot tears in the solidification *** using semi-solid metal(SSM) processing,the hot tearing tendency of alloys can be minimized during *** the present research,the semi-solid slurry of wrought aluminum alloy 2024 was firstly prepared with a novel self-inoculation method(SIM),and then the microstructure characteristics of the semi-solid slurry and the rheo-diecastings cast with the semi-solid slurry were *** results indicate that finer and more uniform globular primary α-Al particles can be obtained when the semi-solid slurry are isothermally held for a short period within the semi-solid temperature range,and the primary α-Al particles without entrapped liquid are uniformly fine,globular grains in the *** holding temperature and time affect the solid fraction,particle size,and shape *** the semi-solid slurry is held at 625 ℃ for 3 min and 5 min,the optimal values for the average equivalent diameter are 70.80 μm and 74.15 μm,and for the shape factor are 1.32 and 1.42,*** solidification process of the rheo-diecastings is composed of the following two distinct stages:primary solidification process and secondary solidification *** secondary solidification process consists further of the following three stages:(1) direct growth of secondary primary(α 2) phase from the surface of the primary α-Al phase particles without re-nucleation,(2) independent nucleation and growth of α 3 phase from the residual liquid,and(3) eutectic reaction at the end.

关键词：金属材料铝材料组织结构铝合金

p-a-SiC:H降低晶体硅异质结太阳能电池寄生损失的研究

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信阳师范学院学报（自然科学版） 2024年第2期37卷 159-164页

作者：陆晓曼肖振宇陈传亮李彦磊訾威方国家信阳师范大学建筑节能材料河南省协同创新中心河南信阳464000 武汉大学物理科学与技术学院湖北武汉430072 湖北文理学院物理与电子工程学院湖北襄阳441053

使用宽带隙的p型氢化非晶硅碳(p-a-SiC:H)薄膜作为晶体硅异质结(SHJ)太阳能电池的窗口层,使用时域有限差分法(FDTD)模拟证明,p-a-SiC:H不仅能明显降低窗口层的短波寄生吸收损失,而且可以减少SHJ太阳能电池的反射损失,从而增强SHJ太阳能... 详细信息

使用宽带隙的p型氢化非晶硅碳(p-a-SiC:H)薄膜作为晶体硅异质结(SHJ)太阳能电池的窗口层,使用时域有限差分法(FDTD)模拟证明,p-a-SiC:H不仅能明显降低窗口层的短波寄生吸收损失,而且可以减少SHJ太阳能电池的反射损失,从而增强SHJ太阳能电池的光谱响应。实验结果也证明,使用优化的p-a-SiC:H窗口层可以提升SHJ太阳能电池的短路电流(J_(sc))达1.4 mA/cm^(2),电池光电转化效率达到了21.8%。这主要是由于p-a-SiC:H低的寄生吸收以及使用p-a-SiC:H窗口层降低了SHJ太阳能电池的反射损失所致。

关键词：晶体硅异质结太阳能电池 p型非晶硅碳时域有限差分法寄生吸收

High-performance liquid metal electromagnetic actuator fabricated by femtosecond laser

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International Journal of Extreme Manufacturing 2024年第2期6卷 511-521页

作者： Yiyu Chen Hao Wu Rui li Shaojun Jiang Shuneng Zhou Zehang Cui Yuan Tao Xinyuan Zheng Qianqian Zhang Jiawen li Guoqiang li Dong Wu Jiaru Chu yanlei Hu CAS Key Laboratory of Mechanical Behavior and Design of Materials Key Laboratory of Precision Scientific Instrumentation of Anhui Higher Education InstitutesDepartment of Precision Machinery and Precision InstrumentationUniversity of Science and Technology of ChinaHefei 230027People’s Republic of China Key Laboratory of Testing Technology for Manufacturing Process of Ministry of Education Southwest University of Science and TechnologyMianyang 621010People’s Republic of China Department of Mechanical Engineering The University of Hong KongHong Kong Special Administrative Region of ChinaPeople’s Republic of China

Small-scale electromagnetic soft actuators are characterized by a fast response and simplecontrol,holding prospects in the field of soft and miniaturized *** use of liquid metal(LM)to replace a rigid conductor inside soft actuators can reduce the rigidity and enhance the actuation performance and *** research efforts,challenges persist in the flexible fabrication of LM soft actuators and in the improvement of actuation *** address these challenges,we developed a fast and robust electromagnetic soft microplate actuator based on a laser-induced selective adhesion transfer *** with unprecedentedly thin LM circuit and customized low Young’s modulus silicone rubber(1.03 kPa),our actuator exhibits an excellent deformation angle(265.25?)and actuation bending angular velocity(284.66 rad·s^(-1)).Furthermore,multiple actuators have been combined to build an artificial gripper with a wide range of *** actuator presents new possibilities for designing small-scaleartificial machines and supports advancements in ultrafast soft and miniaturized robotics.

关键词： soft actuators femtosecond laser liquid metal

Effects of processing parameters and addition of flame-retardant into moulding sand on the microstructure and fluidity of sand-cast magnesium alloy Mg-10Gd-3Y-0.5Zr

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Journal of Materials Science & Technology 2017年第6期33卷 558-566页

作者： yanlei li Guohua Wu Antao Chen Wencai liu Yingxin Wang liang Zhang National Engineering Research Center of light Alloy Net Forming and State Key Laboratory of Metal Matrix Composites School of Materials Science and Engineering Shanghai Jiao Tong University Shanghai light Alloy Net Forming National Engineering Research Center Co. Ltd.

In this study, the effects of processing parameters（such as pouring temperature and mould pre-heating temperature） and flame-retardant content on the microstructure and fluidity of sand-cast magnesium（Mg） alloy Mg-10Gd-3Y-0.5Zr（GW103K） were systematically investigated. It was found that the increase of pouring temperature leads to coarsened microstructure and decreased fluidity of sand-cast GW103 K alloy. Increase of mould pre-heating temperature incurs coarsening of as-cast microstructure and increase of fluidity. The addition of flame-retardant into moulding sand has a negligible influence on the microstructure of sand-cast GW103 K alloy. With the increase in flame-retardant content,fluidity of the alloy initially increases and then decreases. The optimized process parameters and flameretardant addition were obtained to be pouring temperature of 750？C, mould temperature of 110？C, and flame-retardant addition of 1%. The fire retardant mechanism of moulding sand was determined.

关键词： Magnesium alloy Fluidity Microstructure Flame retardant Fire retardant mechanism

Ionic liquid-trimetallic electrocatalytic system for C–O bond cleavage in lignin model compounds and lignin under ambient conditions

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Nano Research 2024年第4期17卷 2420-2428页

作者： Guangyong liu Yumiao Lu JunFeng Lu yanlei Wang Shijing liang Hongyan He lilong Jiang National Engineering Research Center of Chemical Fertilizer Catalyst Fuzhou UniversityFuzhou 350002China CAS Key Laboratory of Green Process and Engineering State Key Laboratory of Multiphase Complex SystemsBeijing Key Laboratory of Ionic Liquids Clean ProcessInstitute of Process EngineeringChinese Academy of SciencesBeijing 100190China Longzihu New Energy Laboratory Zhengzhou Institute of Emerging Industrial TechnologyZhengzhou 450000China

Electrocatalytic depolymerization of lignin into value-added chemicals offers a promising technique to make biorefining ***,we report a robust trimetallic PdNiBi electrocatalyst for reductive C–O bond cleavage of different lignin model dimers and oxidized lignin under mild *** reduction reaction proceeds with complete substrate conversion and excellent yields toward monomers of phenols(80%–99%)and acetophenones(75%–96%)in the presence of an ionic liquid electrolyte with operational *** experimental investigations together with density functional theory(DFT)calculations reveal that the outstanding performance of the catalyst results from the synergistic effect of the metal elements,which facilitates the easier formation of a key Cαradical intermediate and the facile desorption of the as-formed products at the *** results open up new opportunities for lignin valorization through the green electrocatalytic approach.

关键词： electrocatalytic depolymerization lignin Ionic liquids density functional theory(DFT)calculation