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Hypercalcemic crisis due to a mediastinal parathyroid cyst diagnosed by ultrasound-guided fine needle aspiration

Chinese Medical Journal 2010年第24期123卷 3731-3733页

作者： zhu Yan LI Nai-shi LU Lin CHEN Shi XING Xiao-ping meng Xun-wu GUAN Heng TAN Li LU Ke meng Yun-xiao Department of Endocrinology Key Laboratory of Endocrine and Metabolic Diseases Ministry of Health Peking Union Medical College Hospital Peking Union Medical College & Chinese Academy of Medical Sciences Beijing 100730 China Department of Vascular Surgery Peking Union Medical College Hospital Peking Union Medical College & Chinese Academy of Medical Sciences Beijing 100730 China Department of Ultrasound Peking Union Medical College Hospital Peking Union Medical College & Chinese Academy of Medical Sciences Beijing 100730 China Department of Pathology Peking Union Medical College Hospital Peking Union Medical College & Chinese Academy of Medical Sciences Beijing 100730 China

Hypercalcemic crisis, generally accepted as serum calcium concentration greater than 3.5 mmol/L,constitues a life-threatening endocrinologic emergency,and is most frequently caused by either primary hyperparathyroidism （PHPT） or malignant *** cysts are uncommon lesions, most of that are located in the low part of the neck. By routine neck ultrasound scan investigation in a large series of 6621 patients, only 5 parathyroid cysts were detected, yielding a prevalence of 0.075% in setting of unselected *** parathyroid cysts in the mediastinum are much less frequently encountered, with only 106 cases reported in English literature.2,3 Moreover, less than half of these cases presented as functional with elevated serum calcium and parathyroid hormone, and only 10 cases were associated with hypercalcemic crisis.3 Herein, we present a rare case of mediastinal parathyroid cyst associated with recurrent hypercalcemic crisis, which diagnosed by ultrasound-guided fine needle aspiration （FNA）.

关键词： primary hyperparathyroidism hypercalcemic crisis mediastinal parathyroid cyst ultrasound-guided fine needle aspiration

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Pyrolysis characteristics of Radix Rhizoma Rhei, Cortex Moudan Radicis, and Radix Sanguisorbae and correlations with the carbonizing process of Chinese herbs

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Chinese Journal of Natural Medicines 2014年第1期12卷 55-64页

作者： meng Xiang-long GUO Xiao-Hui CUI Nan-Nan MA Jun-Nan ZHANG Shuo-Sheng FAN Zhou Shanxi University of Traditional Chinese Medicine Institute of Coal Chemistry Chinese Academy of Sciences Key Laboratory of Carbon Material Hubei University of Traditional Chinese Medicine

AIM： The aim of the work is to study the pyrolysis characteristics of Radix Rhizoma Rhei, Cortex Moudan Radicis, and Radix Sanguisorbae in an inert atmosphere of argon （Ar）, and to investigate the mechanism of the carbonizing process of the three traditional Chinese herbs. METHODS： The pyrolysis characteristics of the crude materials and their extracts were studied by thermogravimetry-mass spectrometry （TG-MS） in a carrier gas of argon, coupled with Fourier transform infrared spectrometry （FTIR） and scanning electron microscopy （SEM） methods. Correlation of the pyrolysis behaviors with the carbonizing process by stir-frying of traditional Chinese medicines was made. RESULTS： Within the temperature range of 200-300 ℃, which is the testing range for the study of the carbonizing process of Chinese herbs, the temperatures indicated by the maximum weight loss rate peak of the above three extracts were taken as the upper-limit temperatures of the carbonizing process of the herbs, and which were 200, 240 and 247 ℃ for Radix Rhizoma Rhei, Cortex Moudan Radicis, and Radix Sanguisorbae, respectively. The ion monitoring signal peaks detected by the TG-MS method corresponded with reports that the level of chemical components of traditional Chinese medicinal materials would decrease after the carbonizing process. It was confirmed by Fourier transform infrared spectrometry （FTIR） and scanning electron microscopy （SEM） methods that better results of ＂medicinal property preservation＂ could be obtained by heating at 200 ℃ for Radix Rhizoma Rhei, at about 250 ℃ for Cortex Moudan Radicis, and Radix Sanguisorbae, as the relative intensity values of the common peaks were among the middle of their three carbonized samples by programmed heating. CONCLUSION： The upper-limit temperatures of the carbonizing process for Radix Rhizoma Rhei, Cortex Moudan Radicis and Radix Sanguisorbae were 200, 240 and 247 ℃ respectively. It is feasible to research the mechanism and technology of the carboniz

关键词： Chinese materia medica Mechanism and technology of carbonizing process Thermogravimetry-mass spectrometry(TG-MS) Fourier transform infrared spectrometry (FTIR) Scanning electron microscopy (SEM)

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longitudinal profiled plate straightening process based on curvature integral method

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Journal of Iron and Steel Research International 2021年第3期28卷 291-302页

作者： Jian-liang Sun Kai Li meng-qian Sun Xiang-hui Lu Yan Peng National Engineering Research Center for Equipment and Technology of Cold Strip Rolling Yanshan UniversityQinhuangdao066004HebeiChina Department of Mechatronics Engineering Hebei Construction Material Vocational and Technical CollegeQinhuangdao066004HebeiChina

Considering the variable cross section thickness of longitudinal profiled plate and the dynamic reductions of straightening rolls,an analytical model combining curvature integral method with linear decreasing straightening scheme was proposed to investigate the longitudinal profiled plate straightening ***,the calculation flow and solution algorithm of longitudinal profiled plate straightening process were *** verify the proposed model,calculated straightening forces were compared with the measured values,and very good agreements were ***,the reduction,contact angle,reverse bending curvature,residual curvature,straightening force and straightening moment of longitudinal profiled plate in the straightening process were calculated and analyzed,and the calculated results show that the curvature integral method can be used to reveal the mechanism of longitudinal profiled plate straightening.

关键词： longitudinal profiled plate straightening Curvature integral method Linear decreasing straightening scheme Residual curvature

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不同教研活动样态中的新手教师学习:基于专业发展系统视域

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教师教育研究 2021年第4期33卷 86-91,114页

作者：朱梦华上海师范大学教育学院上海200234

教研活动作为中国特色的教师专业发展活动,为新手教师学习提供了宝贵资源。基于教师专业发展系统要素理论,本研究以上海市三所学校的新手教师为个案,探究其如何在不同教研活动样态中学习。研究发现,三所学校分别呈现出三种教研活动样态... 详细信息

教研活动作为中国特色的教师专业发展活动,为新手教师学习提供了宝贵资源。基于教师专业发展系统要素理论,本研究以上海市三所学校的新手教师为个案,探究其如何在不同教研活动样态中学习。研究发现,三所学校分别呈现出三种教研活动样态:校本探索为主导、校际联合为主导、专家引领为主导。不同样态中新手教师专业发展的制度情境与互动情境具有差异性,在不同促进者的作用下呈现出独特的学习路径。本研究的发现有助于深入理解新手教师学习发生的情境特征,为优化校本、区域、跨界的教师专业发展活动,增强学习活动、促进者、新手教师之间的匹配性,激发教师个体学习潜能提供了实证研究基础。同时为新教师入职教育制度改进明确了方向。

关键词：教研活动教师学习新手教师专业发展系统

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A Secure Mutual Authentication Scheme of Blockchain-Based in WBANs

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China Communications 2020年第9期17卷 34-49页

作者： Jianbo Xu Xiangwei meng Wei Liang Hongbo Zhou Kuan-Ching Li School of Computer science and Engineering Hunan University of Science and TechnologyXiangtan 411201China College of Computer science and Electronic engineering Hunan UniversityChangsha 410082China School of Software Quanzhou University of Information engineeringQuanzhou 362000China Department of Computer Science and Information engineering Taichung 43301TaiwanChina

Wireless Body Area Networks(WBANs)refer to small sensor network that consists of sensor devices mounted on the surface of the body or implanted in the body,as such networks are employed to harvest physiological data of the human body or to act as an assistant regulator of several specific physiological indicators of the human *** sensor devices transmit the harvested human physiological data to the local node via a public *** transmitting data,the sensor device and the local node should perform mutual authentication and key *** is proposed in this paper a secure mutual authentication scheme of blockchain-based in *** analyze the security of this scheme,formal security analysis,and informal security analysis are used,then the computation and communication costs are compared with those of the relevant *** experimental results reveal that the proposed scheme exhibit more effective control over energy consumption and promising.

关键词： information security authentication blockchain WBANs Real-or-Random model

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不同养护温度下蒸养混凝土的冲击性能

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建筑材料学报 2020年第3期23卷 521-528,536页

作者：谢友均王猛马昆林龙广成中南大学土木工程学院湖南长沙410075

为掌握蒸养混凝土的冲击性能及养护温度对其影响规律,以高速铁路典型预制构件用C60蒸养混凝土为研究对象,采用分离式霍普金森压杆(SHPB)试验方法,对比研究了不同养护温度下蒸养混凝土在不同应变率下的破坏形态、应力-应变关系以及应变... 详细信息

为掌握蒸养混凝土的冲击性能及养护温度对其影响规律,以高速铁路典型预制构件用C60蒸养混凝土为研究对象,采用分离式霍普金森压杆(SHPB)试验方法,对比研究了不同养护温度下蒸养混凝土在不同应变率下的破坏形态、应力-应变关系以及应变率效应,提出了表征蒸养混凝土破碎程度的评价指标——颗粒细度模数,分析了养护温度对蒸养混凝土冲击性能的影响规律.结果表明:随着应变率的增加,各养护温度下的蒸养混凝土峰值应力均增大,峰值应变则降低,颗粒细度模数减小,破碎程度明显增加;随着养护温度的升高,各应变率下蒸养混凝土的峰值应力降低,表现出更强的应变率效应;所建立的考虑应变率的蒸养混凝土本构模型拟合结果与试验结果吻合良好;较高养护温度导致混凝土内部缺陷增多,从而使得其冲击性能与常温养护混凝土有所差异.

关键词：蒸养混凝土冲击性能分离式霍普金森压杆应力-应变关系本构模型

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In-situ surface transformation of magnesium to protect against oxidation at elevated temperatures

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Journal of Materials Science & Technology 2020年第9期44卷 48-53页

作者： Yuecun Wang meng Li Yueqing Yang Xin’ai Zhao Evan Ma Zhiwei Shan Center for Advancing Materials Performance from the Nanoscale(CAMP-Nano)&Hysitron Applied Research Center in China(HARCC) State Key Laboratory for Mechanical Behavior of MaterialsXi’an Jiaotong UniversityXi’an710049China Department of Materials Science and Engineering Johns Hopkins UniversityBaltimore21218MDUSA

The native oxide thin scale on magnesium(Mg)surface appears continuous and crack-free,but cannot protect the Mg matrix from further oxidation,especially at elevated *** thermal oxidation process is witnessed in its entirety using a home-made in-situ heating device inside an environmental electron transmission *** proposed,and verified with real-time experimental evidence,that transforming the native oxide scale into a thin continuous surface layer with high vacancy formation energy(low vacancy concentration),for example MgCO3,can effectively protect Mg from high-temperature oxidation and raise the threshold oxidation temperature by at least two hundred degrees.

关键词： Magnesium Thermal oxidation In-situ E-TEM Carbonation Oxidation inhibition

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An Internal Model Based Iterative Learning Control for Wafer Scanner Systems

An Internal Model Based Iterative Learning Control for Wafer...

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第37届中国控制会议

作者： Qiao zhu Jun’xiong Chen meng’en Xu School of Mechanical Engineering Southwest Jiaotong University

This work focuses on the model-free iterative learning control(ILC) design with good transient performance and fast convergence rate that is employed for precision control of a wafter stage. First, the experimental setup, the mathematical model,and the desired reference are introduced. Notice that the desired reference and its internal model(IM) are known in ***, based on the internal model principle(IMP), a new ILC scheme, named as IM-based ILC, is proposed by incorporating the IM of the reference. The proposed IM-based ILC is model-free, that is, independent on the system model of the controlled *** IM-based ILC is carefully constructed to track the reference along the time axis while tracking/rejecting repetitive variations along the iteration axis. Precisely because of the tracking capability along the time axis in every iteration, the IM-based ILC can achieve satisfactory performance even in the 0 th iteration and improve the transient performance and the convergence *** addition, the 2-D H theory is used to establish the design criterion for the IM-based ILC. Finally, in the experiments, the efficiency of the IM-based ILC is illustrated by comparing with a P-type ILC and a model-based one.

关键词： Iterative learning control internal model model-free wafter stage control

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High-voltage quasi-vertical GaN-on-Si Schottky barrier diode with edge termination structure of optimized multi-level N ion implantation

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Science China(Information Sciences) 2024年第12期67卷 339-340页

作者： Qingyuan CHANG Bin HOU Ling YANG Mei WU meng ZHANG Hao LU Fuchun JIA Xuerui NIU Chunzhou SHI Jiale DU Mao JIA Qian YU Shiming LI Youjun zhu Xiaohua MA Yue HAO School of Microelectronics Xidian University The 29th Research Institute of China Electronics Technology Group Corporation School of Advanced Materials and Nanotechnology Xidian University

GaN has several advantages, such as a large bandgap（3.44 eV）, high critical electric field（3.3 MV/cm）, and high carrier mobility（900 cm2/Vs）, making it a strong candidate for next-generation high-power applications. In recent years,vertical Schottky barrier diodes（SBDs） have garnered significant attention due to their ability to achieve high breakdown voltage in small device sizes, insensitivity to surface states, improved heat dissipation, and enhanced reliability,distinguishing them from lateral diodes.

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Dynamic Brain Responses Modulated by Precise Timing Prediction in an Opposing Process

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Neuroscience Bulletin 2021年第1期37卷 70-80页

作者： Minpeng Xu Jiayuan meng Haiqing Yu Tzyy-Ping Jung Dong Ming College of Precision Instruments and Optoelectronics Engineering Tianjin UniversityTianjin 300072China Academy of Medical Engineering and Translational Medicine Tianjin UniversityTianjin 300072China Swartz Center for Computational Neuroscience University of CaliforniaSan DiegoCA 92093USA

The brain function of prediction is fundamental for human beings to shape perceptions efficiently and successively. Through decades of effort, a valuable brain activation map has been obtained for prediction. However,much less is known about how the brain manages the prediction process over time using traditional neuropsychological paradigms. Here, we implemented an innovative paradigm for timing prediction to precisely study the temporal dynamics of neural oscillations. In the experiment recruiting 45 participants, expectation suppression was found for the overall electroencephalographic activity,consistent with previous hemodynamic studies. Notably,we found that N1 was positively associated with predictability while N2 showed a reversed relation to predictability. Furthermore, the matching prediction had a similar profile with no timing prediction, both showing an almost saturated N1 and an absence of N2. The results indicate that the N1 process showed a ‘sharpening' effect for predictable inputs, while the N2 process showed a‘dampening' effect. Therefore, these two paradoxical neural effects of prediction, which have provoked wide confusion in accounting for expectation suppression,actually co-exist in the procedure of timing prediction but work in separate time windows. These findings strongly support a recently-proposed opposing process theory.

关键词： Expectation suppression Predictive coding Event-related potentials Timing prediction

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