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Achieving ultralow leakage current in Schottky-MIS cascode anode lateral field-effect diode based on AlGaN/GaN HEMT

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Science China(Information Sciences) 2025年第1期68卷 379-385页

作者： Fangzhou WANG Changhong GAO guojian DING cheng yu Zhuocheng WANG Xiaohui WANG Qi FENG Ping yu Peng ZUO Wanjun CHEN Yang WANG Haiqiang JIA Hong CHEN Bo ZHANG Zeheng WANG Songshan Lake Materials Laboratory School of Microelectronics Southern University of Science and Technology State Key Laboratory of Electronic Thin Films and Integrated Devices University of Electronic Science and Technology of China Manufacturing Commonwealth Scientific and Industrial Research Organisation

In this paper,we design and fabricate a Schottky-metal-insulator-semiconductor（MIS） cascode anode GaN lateral field-effect diode（CA-LFED） to achieve ultralow reverse leakage current(ILEAK).The device based on AlGaN/GaN highelectron-mobility-transistor（HEMT） includes a normally-off MIS-controlled channel that is cascoded with a high barrier height Schottky *** reverse bias,the high electric-field is effectively prevented by the normally-off MIS-controlled channel *** with the high barrier height Schottky contact,this feature significantly suppresses the *** by the device fabrication,the CA-LFED with high breakdown voltage（BV）>600 V shows an ultralow ILEAKof 3.6×10-9A/mm as well as a low forward voltage drop（VF） of 2.2 *** performance suggests that the CA-LFED can be a promising candidate for ultralow ILEAKand better VF-ILEAKtrade-off GaN power diode applications.

关键词： Schottky-MIS cascode anode lateral field-effect diode (LFED) ultralow reverse leakage current ($I_{\rm{LEAK}}$) forward drop and reverse leakage trade-off AlGaN/GaN HEMTs

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Impacts of near-M_(s)austempering treatment on microstructure evolution and bainitic transformation kinetics of a medium Mn steel

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Journal of Iron and Steel Research International 2025年第1期32卷 249-259页

作者： Yong-gang Yang Xin-yue Liu Rui-zhi Li yu-lai Chen Hong-xiang Wu guo-min Sun Zhen-li Mi National Engineering Research Center for Advanced Rolling and Intelligent Manufacturing University of Science and Technology BeijingBeijing 100083China Technology Center Ningbo Iron&Steel Co.Ltd.Ningbo 315800ZhejiangChina

The microstructure evolution and bainitic transformation of an Fe-0.19C-4.03Mn-1.48Si steel subjected to near-M_(s)austempering treatment were systematically investigated by combining dilatometer,X-ray diffraction,and electron *** additional austempering treatments with isothermal temperatures above M_(s)were used as *** show that the incubation period for the bainitic transformation occurs when the medium Mn steel is treated with the austempering temperature above M_(s).However,when subjected to near-M_(s)isothermal treatment,the medium Mn steel does not show an incubation period and has the fastest bainitic transformation ***,the largest volume fraction of bainite with a value of 74.7%is obtained on the condition of near-M_(s)austempering treatment after cooling to room *** and microstructure evolution analysis indicates that the elimination of the incubation period and the fastest rate of bainitic transformation are related to the preformed *** advent of preformed martensite allows the specimen to generate more bainite in a limited *** bainitic ferrite nucleation at austenite grain boundaries and through autocatalysis at ferrite/austenite interfaces,a model is established to understand the kinetics of bainite formation and it can describe the nucleation rate of bainitic transformation well when compared to the experimental results.

关键词： Medium manganese steel Bainitic transformation Microstructure Near-M_(s)austempering Transformation modeling

A comparison of the proto-dolomite induced by cyanobacteria and halophilic bacteria:implications for dolomite-inducing microbe identification

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Journal of Palaeogeography 2025年第01期14卷 277-290页

作者：赵延洋 Xiang-yu Wei Xiao Gao Na guo Jie Li Kai-Ming Hu Chao Han Qi-yu Wang 韩作振 Shandong Provincial Key Laboratory of Depositional Mineralization and Sedimentary Minerals College of Earth Science and Engineering Shandong University of Science and Technology Laboratory for Marine Mineral Resources Qingdao National Laboratory for Marine Science and Technology Key Laboratory of Sedimentary Basin and Oil and Gas Resources Ministry of Natural Resources Key Laboratory of Deep Oil and Gas China University of Petroleum

This study investigates the morphological and mineralogical characteristics of proto-dolomite induced by two specific microorganisms with varying lifestyles:the extremely halophilic bacterium Vibrio harveyi QPL2 and the cyanobacterium Leptolyngbya boryana. Halophilic bacterially-induced proto-dolomite(HBD) and cyanobacterially-induced proto-dolomite (CBD) were subjected to comprehensive characterization techniques, including X-ray diffraction, scanning electron microscopy, Focused Ion Beam, thermogravimetric analysis, and X-ray photoelectron spectroscopy. The results indicate that both HBD and CBD exhibit a low degree of crystallinity and possess comparable molar ratios of MgCO3to CaCO3. Moreover, neither of them exhibits the ordered structure of ideal dolomite. HBD and CBD exhibit notable distinctions in external morphology and internal structure. HBD forms a subunit aggregate with a less dense surface and numerous pinhole structures resulting from bacterial survival. In contrast, CBD adopts a bispherical shape with a relatively dense surface and minimal indications of cyanobacterial survival. Both HBD and CBD have an internal hollow structure. However, HBD is characterized by sparse population and loosely arranged subunits, while CBD features only a central cavity. Additionally, HBD particles are smaller compared to CBD particles. These morphological differences suggest that HBD primarily grows through bacterial surface-dependent processes,whereas the growth of CBD is not directly reliant on the surface of cyanobacteria. Compositionally, the weightpercentage of crystalline water in CBD exceeded that of HBD with a value of 29.42%compared to 5.9%. This increase in internal crystalline water enables a faster conversion of CBD to the ordered ideal dolomite in a specific diagenetic environment. This study implies that the morphology and composition of microbial protodolomite may aid in identifying the type of dolomite-inducing microbes.

关键词： Proto-dolomite Cyanobacteria Halophile Crystal morphology Water of crystallization

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月见草油微乳冻干粉性能研究

现代食品科技 2014年第9期30卷 109-113页

作者：吴红艳孙长豹刘宁郭成宇齐齐哈尔大学食品与生物工程学院黑龙江齐齐哈尔161006 东北农业大学食品学院黑龙江哈尔滨150030

研究冻干保护剂对月见草油微乳冻干粉性能的影响并对冻干粉稳定性进行考察。采用DSC法分析微乳冻干粉中苏丹Ⅱ的存在形式;以外观性状、粒径、再分散性为指标对微乳冷冻干燥中所使用的冻干保护剂进行筛选;以包封率为指标考察贮藏温度和... 详细信息

研究冻干保护剂对月见草油微乳冻干粉性能的影响并对冻干粉稳定性进行考察。采用DSC法分析微乳冻干粉中苏丹Ⅱ的存在形式;以外观性状、粒径、再分散性为指标对微乳冷冻干燥中所使用的冻干保护剂进行筛选;以包封率为指标考察贮藏温度和时间对冻干粉稳定性的影响。结果显示以甘露醇为冻干保护剂的月见草油微乳冻干粉形态好复水速度快,复溶后粒径变大。冻干粉在37℃下贮存6个月后,微乳包封率从原来的90.92±0.79%下降为82.58±0.66%,变化显著;4℃和20℃下贮存包封率分别为89.50±0.76%、88.80±0.98%,下降较少。DSC数据显示苏丹Ⅱ的加入对微乳冻干粉的热性能没有影响,苏丹Ⅱ以无定形形式存在于冻干粉中。以月见草油为油相,以甘露醇为冻干保护剂制备的微乳冻干粉性质稳定,包封率较高,在室温下贮存6个月无明显变化。

关键词：微乳液保护剂冷冻干燥月见草油

Demirjian法结合机器学习算法推断北方汉族儿童及青少年牙龄

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法医学杂志 2024年第2期40卷 135-142页

作者：郭瑜鑫卜雯卿唐羽吴迪杨徽孟昊天郭昱成陕西省颅颌面精准医学研究重点实验室西安交通大学口腔医院陕西西安710004 西安交通大学口腔医院正畸科陕西西安710004

目的探讨Demirjian法结合机器学习算法在北方汉族儿童及青少年牙龄推断中的应用价值。方法收集10256例我国北方汉族5~24岁人群的口腔全景片,运用Demirjian法对左下颌8颗恒牙的发育进行分期,并结合支持向量回归、梯度提升回归、线性回归... 详细信息

目的探讨Demirjian法结合机器学习算法在北方汉族儿童及青少年牙龄推断中的应用价值。方法收集10256例我国北方汉族5~24岁人群的口腔全景片,运用Demirjian法对左下颌8颗恒牙的发育进行分期,并结合支持向量回归、梯度提升回归、线性回归、随机森林回归和决策树回归等多种机器学习算法,分别基于总样本、女性样本和男性样本构建年龄推断模型,并评价不同机器学习算法在3组样本中的拟合性能。结果对于总样本和女性样本,推断准确率最高的模型均为支持向量回归模型;对于男性样本,推断准确率最高的模型为梯度提升回归模型。最佳年龄推断模型在总样本、女性样本和男性样本的平均绝对误差分别为1.2463、1.2818和1.1538岁。最佳年龄推断模型对各年龄区间的推断准确率不同,对于18岁以下人群的年龄推断相对准确。结论本研究构建的年龄推断机器学习模型在我国北方汉族儿童及青少年中具有较好的准确率,但在成年人群中的推断效果不理想,可以考虑联合其他变量以提高年龄推断的准确性。

关键词：法医人类学法医齿科学年龄推断机器学习 Demirjian法口腔全景片儿童青少年

Node ranking based on graph curvature and PageRank

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Chinese Physics B 2025年第2期34卷 496-507页

作者： Hongbo Qu yu-Rong Song Ruqi Li Min Li guo-Ping Jiang School of Computer Science Nanjing University of Posts and TelecommunicationsNanjing 210023China College of Automation&College of Artificial Intelligence Nanjing University of Posts and TelecommunicationsNanjing 210023China

Identifying key nodes in complex networks is crucial for understanding and controlling their dynamics. Traditional centrality measures often fall short in capturing the multifaceted roles of nodes within these networks. The Page Rank algorithm, widely recognized for ranking web pages, offers a more nuanced approach by considering the importance of connected nodes. However, existing methods generally overlook the geometric properties of networks, which can provide additional insights into their structure and functionality. In this paper, we propose a novel method named Curv-Page Rank(C-PR), which integrates network curvature and Page Rank to identify influential nodes in complex networks. By leveraging the geometric insights provided by curvature alongside structural properties, C-PR offers a more comprehensive measure of a node's influence. Our approach is particularly effective in networks with community structures, where it excels at pinpointing bridge nodes critical for maintaining connectivity and facilitating information flow. We validate the effectiveness of C-PR through extensive experiments. The results demonstrate that C-PR outperforms traditional centrality-based and Page Rank methods in identifying critical nodes. Our findings offer fresh insights into the structural importance of nodes across diverse network configurations, highlighting the potential of incorporating geometric properties into network analysis.

关键词： important nodes graph curvature complex networks network geometry

Receiver-device-independent quantum secure direct communication

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Science China(Physics,Mechanics & Astronomy) 2025年

作者： cheng Liu cheng Zhang Shi-Pu Gu Xing-Fu Wang Lan Zhou yu-Bo Sheng College of Science Nanjing University of Posts and Telecommunications College of Electronic and Optical Engineering College of Flexible Electronics (Future Technology)Nanjing University of Posts and Telecommunications

Quantum secure direct communication (QSDC) enables the sender to directly transmit secure messages to the receiver via a quantum channel without the need for ***-independent (DI) and measurement-device-independent (MDI) QSDC protocols theoretically enhance the practical security of ***,DI QSDC requires extremely high global detection efficiency and has a limited secure communication *** DI and MDI QSDC protocols depend on high-quality *** entanglement sources,which generate entangled photon pairs with low efficiency,significantly reduce their practical communication *** this paper,we propose a single-photon-based receiver-device-independent (RDI) QSDC *** protocol relies solely on the practical single-photon source,which is nearly on-demand with current technology,and treats all receiving devices on both ends of the communication as“black boxes”.The security of the message is ensured only through the observed *** also develop a numerical method to simulate the protocol’s performance under practical noisy communication *** RDI QSDC protocol provides the same security level as MDI *** to DI and MDI QSDC,RDI QSDC has several ***,it uses single-photon sources and single-photon measurements,which allow it to achieve practical communication efficiency approximately 3415 times greater than that of DI QSDC,while being easier to *** entire protocol is feasible with current ***,it offers higher robustness to photon loss and better noise tolerance than DI QSDC,enabling a secure communication distance approximately 26 times greater than that of DI *** on these advantages,the RDI QSDC protocol presents a promising approach for achieving highly secure and efficient QSDC in the near future.

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民国时期女子习武解读

体育文化导刊 2019年第12期 20-25页

作者：张泽平郭玉成上海体育学院武术学院

运用文献资料法等研究民国时期女子习武的历史背景、表现形式及社会影响。女子习武是民国时期武术发展的特征之一,其历史背景为:束缚女子的封建思想逐渐瓦解,学校武术教育的发展,武术运动会与国术国考女子竞赛项目的设置。女子习武的表... 详细信息

运用文献资料法等研究民国时期女子习武的历史背景、表现形式及社会影响。女子习武是民国时期武术发展的特征之一,其历史背景为:束缚女子的封建思想逐渐瓦解,学校武术教育的发展,武术运动会与国术国考女子竞赛项目的设置。女子习武的表现形式为:学校体育课程中有女子习武内容;官方与民间武术组织中有女子习武成员;武术名家传承中有女子习武范例;军队武术文献中有女子习武记载等。女子习武的社会影响为:习武女子对武术的传授,扩大了女子习武群体;习武女子主动推广武术,加快了武术的海外传播;习武女子参加武术竞赛,助力女子体育观的形成;习武女子投身于保家卫国战争,推进了武术的军队传播。

关键词：武术体育史女子习武民国时期

设计中的艺术渗透——从工业设计发展的历史看设计与艺术的关系

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河北理工学院学报 2001年第2期23卷 90-93页

作者：郭宇承河北理工学院机械系河北唐山063009

介绍了早期的设计与艺术及工业革命后艺术与设计的状况 ,说明设计与艺术始终是相互影响、相互渗透、相互作用的关系。同时。

关键词：艺术设计工业设计文化现象