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A new method of preparing high-performance high-entropy alloys through high-gravity combustion synthesis

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International Journal of Minerals,Metallurgy and Materials 2020年第10期27卷 1347-1352页

作者： Fu-kai Zheng Guan-nan Zhang Xiu-juan Chen Xiao yang zeng-chao yang Yong Li Jiang-tao Li College of Materials Science and Engineering Lanzhou University of TechnologyLanzhou 730050China College of Mechano-Electronic Engineering Lanzhou University of TechnologyLanzhou 730050China Key Laboratory of Cryogenics Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China

A new method of high-gravity combustion synthesis(HGCS)followed by post-treatment(PT)is reported for preparing high-performance high-entropy alloys(HEAs),Cr0.9FeNi2.5V0.2Al0.5 alloy,whereby cheap thermite powder is used as the raw *** this process,the HEA melt and the ceramic melt are rapidly formed by a strong exothermic combustion synthesis reaction and completely separated under a high-gravity ***,the master alloy is obtained after ***,the master alloy is sequentially subjected to conventional vacuum arc melting(VAM),homogenization treatment,cold rolling,and annealing treatment to realize a tensile strength,yield strength,and elongation of 1250 MPa,1075 MPa,and 2.9%,*** present method is increasingly attractive due to its low cost of raw materials and the intermediate product obtained without high-temperature *** on the calculation of phase separation kinetics in the high-temperature melt,it is expected that the final alloys with high performance can be prepared directly across master alloys with higher high-gravity coefficients.

关键词： high-entropy alloys high gravity combustion synthesis post-treatment low-cost high performance

Force and impulse multi-sensor based on flexible gate dielectric field effect transistor

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International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 214-220页

作者： chao Tan Junling Lü Chunchi Zhang Dong Liang Lei yang Zegao Wang College of Materials Science and Engineering Sichuan UniversityChengdu 610065China The 54th Research Institute of China Electronics Technology Group Corporation Shijiazhuang 050081China

Nowadays,force sensors play an important role in industrial production,electronic information,medical health,and many other ***-dimensional material-based filed effect transistor(2D-FET)sensors are competitive with nano-level size,lower power consumption,and accurate ***,few of them has the capability of impulse detection which is a path function,expressing the cumulative effect of the force on the particle over a period of *** we fabricated the flexible polymethyl methacrylate(PMMA)gate dielectric MoS_(2)-FET for force and impulse sensor *** systematically investigated the responses of the sensor to constant force and varying forces,and achieved the conversion factors of the drain current signals(I_(ds))to the detected impulse(I).The applied force was detected and recorded by I_(ds)with a low power consumption of~30 *** sensitivity of the device can reach~8000%and the 4×1 sensor array is able to detect and locate the normal force applied on ***,there was almost no performance loss for the device as left in the air for two months.

关键词： flexible gate dielectric transistor force sensor impulse sensor force sensor array

Constructing quasi-2D perovskite to collect hot carriers to reduce open-circuit voltage loss for efficient inverted perovskite solar cells

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Science China Chemistry 2025年

作者： Lei Gu Xing Li chao Wu yang Feng Chunming yang Lin Song Frontiers Science Center for Flexible Electronics Institute of Flexible Electronics Northwestern Polytechnical University Shanghai Synchrotron Radiation Facility Shanghai Advanced Research Institute Chinese Academy of Sciences

Inverted perovskite solar cells （PSCs） have received great attention owing to the high certificated power conversion efficiency（PCE） reaching 26.7%. However, interfacial charge recombination is far superior to perovskite bulk charge recombination due to the use of fullerenes and their derivatives in inverted perovskite solar cells, which induces devastating open circuit voltage（VOC） losses. For this reason the present work attempts to use 4-chloropiperidine hydrochloride for the upper surface modification of perovskite to construct a quasi-two-dimensional （2D） structure with suitable 2D layer widths （n=2, 3 dominant）,which has a smaller electron carrier transport barrier without sacrificing short-circuit current （JSC） in the device. This strategy effectively passivates the interfacial defect states while promoting energy level alignment to achieve carrier dissociation and equilibrium transport at the interface, which in turn resulted in improved fill factor （FF）. In addition, additional energy levels are provided by 2D perovskites to collect hot carriers, resulting in improved device open circuit voltage （VOC）. As a result, the device PCE increases from 22.37%to 24.11%after the 4CPD treatment. In addition, the 4CPD-treated PSCs maintain 90%of the initial PCE after storage in an N2atmosphere at 50°C for 1,080 h, whereas the control devices show a 15%PCE loss under the same aging conditions. This work provides new opportunities to suppress interfacial charge recombination in inverted devices.

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Tribo-piezoelectric hybrid nanogenerator based on temporary solution template process

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Science China Technological Sciences 2025年

作者： Jinxian ZHANG Peng PAN Zhengchun yang Jie HE Peifeng zeng College of Integrated Circuit Science and Engineering Tianjin University of Technology

In this study, a friction piezoelectric hybrid nanogenerator （HNG） with a sponge-like structure was developed. A novel temporary solution template process was proposed to create smaller, uniformly distributed pores within the sponge structure, allowing for the complete volatilization of the porous agent without causing structural defects. The output voltage of the porous HNG structure was nearly twice that of its solid structure, demonstrating superior electrical output performance. A peak-to-peak open circuit voltage of 168 V, a short circuit current density of 36.41μA cm-2, and a maximum power density of 32 W m-2were obtained at a load resistance of 200 MΩby periodically compressing an HNG with a dimension of 0.8 cm×0.8 cm. The generated electricity was sufficient to directly illuminate 180 tandem white LEDs and power small electronic devices. In addition, this study shows that the HNG could detect electrical signals from different parts of the human body during movement, suggesting significant potential for applications in energy harvesting and motion sensing.

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Repetitive traumatic brain injury–induced complement C1–related inflammation impairs long-term hippocampal neurogenesis

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Neural Regeneration Research 2025年第3期20卷 821-835页

作者： Jing Wang Bing Zhang Lanfang Li Xiaomei Tang Jinyu zeng Yige Song chao Xu Kai Zhao Guoqiang Liu Youming Lu Xinyan Li Kai Shu Department of Neurosurgery Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhanHubei ProvinceChina Department of Neurosurgery Shanxi Bethune HospitalShanxi Academy of Medical SciencesTongji Shanxi HospitalThird Hospital of Shanxi Medical UniversityTaiyuanShanxi ProvinceChina Department of Pathophysiology School of Basic Medicine and Tongji Medical CollegeHuazhong University of Science and TechnologyWuhanHubei ProvinceChina Institute for Brain Research Wuhan Center of Brain ScienceHuazhong University of Science and TechnologyWuhanHubei ProvinceChina Department of Graduate Student Chongqing Medical UniversityChongqingChina Department of Basic Medicine School of Medical ScienceHubei University for NationalitiesEnshiHubei ProvinceChina Department of Anatomy School of Basic Medicine and Tongji Medical CollegeHuazhong University of Science and TechnologyWuhanHubei ProvinceChina

Repetitive traumatic brain injury impacts adult neurogenesis in the hippocampal dentate gyrus,leading to long-term cognitive ***,the mechanism underlying this neurogenesis impairment remains *** this study,we established a male mouse model of repetitive traumatic brain injury and performed long-term evaluation of neurogenesis of the hippocampal dentate gyrus after repetitive traumatic brain *** results showed that repetitive traumatic brain injury inhibited neural stem cell proliferation and development,delayed neuronal maturation,and reduced the complexity of neuronal dendrites and *** with repetitive traumatic brain injuryalso showed deficits in spatial memory ***,following repetitive traumatic brain injury,neuroinflammation was enhanced in the neurogenesis microenvironment where C1q levels were increased,C1q binding protein levels were decreased,and canonical Wnt/β-catenin signaling was *** inhibitor of C1 reversed the long-term impairment of neurogenesis induced by repetitive traumatic brain injury and improved neurological *** findings suggest that repetitive traumatic brain injury–induced C1-related inflammation impairs long-term neurogenesis in the dentate gyrus and contributes to spatial memory retrieval dysfunction.

关键词： complement C1 dendrite dentate gyrus hippocampus neural stem cell neurogenesis neuroinflammation neurological function neuron traumatic brain injury

远古的馈赠:近现代人类基因溯源突破性进展——写在2022年诺贝尔生理学或医学奖颁布之际

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生物化学与生物物理进展 2022年第12期49卷 2253-2265页

作者：关凡吴晓敏黄河曾朝阳熊炜范春梅中南大学基础医学院长沙410013 中南大学肿瘤研究所国家卫健委癌变原理重点实验室和教育部癌变与侵袭原理重点实验室长沙410078

2022年诺贝尔生理学或医学奖授予瑞典生物学家斯万特·帕博(Svante P??bo),以表彰他在古人类基因组学和人类起源方面做出的决定性贡献。关于人类起源,存在各种学说,目前主流的观点是“走出非洲学说”。斯万特·帕博在开创一门新的学科... 详细信息

2022年诺贝尔生理学或医学奖授予瑞典生物学家斯万特·帕博(Svante P??bo),以表彰他在古人类基因组学和人类起源方面做出的决定性贡献。关于人类起源,存在各种学说,目前主流的观点是“走出非洲学说”。斯万特·帕博在开创一门新的学科——古人类基因组学的同时,一直在不断完善“走出非洲学说”。他借助各种生物学技术,从基因组学的角度去深入探究人类起源,发现我们身体内保留着一些来自古人类的基因印迹。这项研究意味着在研究某些疾病的时候可以追根溯源,而不是将眼光局限于基因本身,探究某个基因从哪里来将会是研究疾病的全新思路。本文总结了他在研究过程中对相关生物技术的革新、基于线粒体和核基因组对古人类的探究以及相关成果,并介绍了一些源自古人类的基因及其有关信息。

关键词：尼安德特人丹尼索瓦人走出非洲核基因组测序基因交流抗感染

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小剂量轻比重腰麻-硬膜外联合麻醉在老年下肢骨折手术患者中的应用

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系统医学 2020年第4期5卷 49-51页

作者：陈栋曾朝阳重钢总医院麻醉科重庆400080

目的探讨小剂量轻比重腰麻-硬膜外联合麻醉在老年下肢骨折手术患者中的应用。方法选择2018年9月-2019年9月于该院进行手术治疗的老年下肢骨折患者82例,以随机数表法将其分为两组,即对照组与研究组各41例。对照组应用持续硬膜外麻醉,研... 详细信息

目的探讨小剂量轻比重腰麻-硬膜外联合麻醉在老年下肢骨折手术患者中的应用。方法选择2018年9月-2019年9月于该院进行手术治疗的老年下肢骨折患者82例,以随机数表法将其分为两组,即对照组与研究组各41例。对照组应用持续硬膜外麻醉,研究组应用小剂量轻比腰麻-硬膜外联合麻醉。对比两组感觉阻滞起效时间、麻醉维持时间、改良下肢运动阻滞程度评分(Bromage),以及麻醉相关并发症情况。结果研究组感觉阻滞起效时间(1.5±1.0)min低于对照组(2.1±0.5)min(t=3.436,P0.05)。研究组麻醉相关并发症发生率为2.44%低于对照组19.51%(χ^2=6.116,P<0.05)。结论小剂量轻比重腰麻-硬膜外联合麻醉在老年下肢骨折手术患者中具有显著的应用效果,不仅起效快速,且安全性佳,值得临床推广。

关键词：小剂量轻比重腰麻-硬膜外麻醉老年下肢骨折手术

Grid-Connected/Islanded Switching Control Strategy for Photovoltaic Storage Hybrid Inverters Based on Modified Chimpanzee Optimization Algorithm

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Energy Engineering 2025年第1期122卷 265-284页

作者： chao Zhou NarisuWang Fuyin Ni Wenchao Zhang School of Electrical and Information Engineering Jiangsu University of TechnologyChangzhou213001China Jiangsu Key Laboratory of Power Transmission&Distribution Equipment Technology Jiangsu University of TechnologyChangzhou213001China

Uneven power distribution,transient voltage,and frequency deviations are observed in the photovoltaic storage hybrid inverter during the switching between grid-connected and island *** response to these issues,this paper proposes a grid-connected/island switching control strategy for photovoltaic storage hybrid inverters based on the modified chimpanzee optimization *** proposed strategy incorporates coupling compensation and power differentiation elements based on the traditional droop ***,it combines the angular frequency and voltage amplitude adjustments provided by the phase-locked loop-free pre-synchronization control *** pre-synchronization is achieved by regulating the virtual current to zero and aligning the photovoltaic storage hybrid inverter with the grid ***,two novel operators,learning and emotional behaviors are introduced to enhance the optimization precision of the chimpanzee *** operators ensure high-precision and high-reliability optimization of the droop control parameters for photovoltaic storage hybrid inverters.A Simulink model was constructed for simulation analysis,which validated the optimized control strategy’s ability to evenly distribute power under load *** strategy effectively mitigated transient voltage and current surges during mode ***,seamless and efficient switching between gridconnected and island modes was achieved for the photovoltaic storage hybrid *** enhanced energy utilization efficiency,in turn,offers robust technical support for grid stability.

关键词： Photovoltaic storage hybrid inverters modified chimpanzee optimization algorithm droop control seamless switching

子宫腺肌瘤切除术后延续治疗方案的多中心临床研究

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中国医学创新 2014年第24期11卷 51-54页

作者：曾朝阳谭琛梁婷南方医科大学中西医结合医院广东广州510315 湖南省郴州市第一人民医院

目的:比较促性腺激素释放激素激动剂(GnRH-a)和左炔诺酮宫内缓释系统(LNG-IUS)作为子宫腺肌瘤切除术后延续治疗方案的治疗效果。方法:选取本院妇科及湖南省郴州市第一人民医院妇科2010年1月-2012年1月行子宫腺肌瘤切除术住院患者160例,... 详细信息

目的:比较促性腺激素释放激素激动剂(GnRH-a)和左炔诺酮宫内缓释系统(LNG-IUS)作为子宫腺肌瘤切除术后延续治疗方案的治疗效果。方法:选取本院妇科及湖南省郴州市第一人民医院妇科2010年1月-2012年1月行子宫腺肌瘤切除术住院患者160例,按随机数字表法分为A组(GnRH-a治疗组)80例和B组(LNG-IUS治疗组)78例(2例患者因宫内环脱落退出),随访2年对比各组疗效。结果:两组复发率的比较差异无统计学意义(P>0.05)。两组术后2年疼痛强度、影响活动程度、活动力丧失等方面比较差异均无统计学意义(P>0.05)。A组术后6个月子宫体积明显小于B组[(65.7±17.3)cm3 vs(79.6±17.1)cm3,P=0.0035]。两组的疼痛评分、血红蛋白和CA-125比较差异均无统计学意义(P>0.05)。结论:促性腺激素释放激素激动剂和左炔诺酮宫内缓释系统均可作为子宫腺肌瘤切除术后延续治疗方案,促性腺激素释放激素激动剂有利于术后早期控制子宫体积。

关键词：子宫腺肌瘤促性腺激素释放激素激动剂左炔诺酮宫内缓释系统