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Origin and structures of solar eruptions Ⅰ: Magnetic flux rope

Science China Earth Sciences 2017年第8期60卷 1383-1407页

作者： CHENG Xin guo Yang ding MingDe School of Astronomy and Space Science Nanjing University Key Laboratory for Modern Astronomy and Astrophysics (Nanjing University) Ministry of Education

Coronal mass ejections(CMEs) and solar flares are the large-scale and most energetic eruptive phenomena in our solar system and able to release a large quantity of plasma and magnetic flux from the solar atmosphere into the solar wind. When these high-speed magnetized plasmas along with the energetic particles arrive at the Earth, they may interact with the magnetosphere and ionosphere, and seriously affect the safety of human high-tech activities in outer space. The travel time of a CME to 1 AU is about 1–3 days, while energetic particles from the eruptions arrive even earlier. An efficient forecast of these phenomena therefore requires a clear detection of CMEs/flares at the stage as early as possible. To estimate the possibility of an eruption leading to a CME/flare, we need to elucidate some fundamental but elusive processes including in particular the origin and structures of CMEs/flares. Understanding these processes can not only improve the prediction of the occurrence of CMEs/flares and their effects on geospace and the heliosphere but also help understand the mass ejections and flares on other solar-type stars. The main purpose of this review is to address the origin and early structures of CMEs/flares, from multi-wavelength observational perspective. First of all, we start with the ongoing debate of whether the pre-eruptive configuration, i.e., a helical magnetic flux rope(MFR), of CMEs/flares exists before the eruption and then emphatically introduce observational manifestations of the MFR. Secondly, we elaborate on the possible formation mechanisms of the MFR through distinct ways. Thirdly, we discuss the initiation of the MFR and associated dynamics during its evolution toward the CME/flare. Finally, we come to some conclusions and put forward some prospects in the future.

关键词： Coronal mass ejections Flares Magnetic flux ropes Magnetic field EUV/UV emissions Photosphere Corona Particle acceleration

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Interpolation-based contour error estimation and componentbased contouring control for five-axis CNC machine tools

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Science China(Technological Sciences) 2018年第11期61卷 1666-1678页

作者： LI XiangFei zhao Huan zhao Xin ding Han State key Laboratory of Digital Manufacturing Equipment and Technology Huazhong University of Science and Technology

High accuracy contour error estimation and direct contour error control are two major approaches to reduce the contour ***, two key factors make them complex for five-axis machine tools: the nonlinear kinematics and the coupling between the tool position and orientation. In this study, by finding the reference point nearest to the current actual position, and interpolating the point with two neighboring reference points and using the distance ratio, a new contour error estimation method for five-axis machine tools is proposed, which guarantees high accuracy while depending on only the reference points. By adding a weighted contour error on the tracking error in the workpiece coordinate system, and specifying a desired second-order error dynamics based on the error variable, an effective contouring control method is proposed, which can alleviate the problem: when the contour error components are introduced into the controller, the contour errors increase instead in some regions of the tracking trajectory. A series of experiments are performed on a tilting-rotary-table(TRT) type five-axis machine tool. The results reveal that the proposed estimation method has high accuracy, and compared with the case without contour error control, the proposed control approach can reduce the contour error along the whole trajectory.

关键词： five-axis contour error contouring control interpolation component-based

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Origin and structures of solar eruptions Ⅱ: Magnetic modeling

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Science China Earth Sciences 2017年第8期60卷 1408-1439页

作者： guo Yang CHENG Xin ding MingDe School of Astronomy and Space Science Nanjing University Key Laboratory for Modern Astronomy and Astrophysics (Nanjing University) Ministry of Education

The topology and dynamics of the three-dimensional magnetic field in the solar atmosphere govern various solar eruptive phenomena and activities, such as flares, coronal mass ejections, and filaments/prominences. We have to observe and model the vector magnetic field to understand the structures and physical mechanisms of these solar activities. Vector magnetic fields on the photosphere are routinely observed via the polarized light, and inferred with the inversion of Stokes profiles. To analyze these vector magnetic fields, we need first to remove the 180° ambiguity of the transverse components and correct the projection effect. Then, the vector magnetic field can be served as the boundary conditions for a force-free field modeling after a proper preprocessing. The photospheric velocity field can also be derived from a time sequence of vector magnetic ***-dimensional magnetic field could be derived and studied with theoretical force-free field models, numerical nonlinear force-free field models, magnetohydrostatic models, and magnetohydrodynamic models. Magnetic energy can be computed with three-dimensional magnetic field models or a time series of vector magnetic field. The magnetic topology is analyzed by pinpointing the positions of magnetic null points, bald patches, and quasi-separatrix layers. As a well conserved physical quantity,magnetic helicity can be computed with various methods, such as the finite volume method, discrete flux tube method, and helicity flux integration method. This quantity serves as a promising parameter characterizing the activity level of solar active regions.

关键词： Solar activity Solar corona Coronal Mass Ejections(CMEs) Solar flares Magnetic fields Solar photosphere

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Effect of Nb on Microstructure and Mechanical Properties in Non-magnetic High Manganese Steel

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Journal of Iron and Steel Research International 2014年第6期21卷 600-605页

作者： Jia-li CAO Ai-min zhao Ji-xiong LIU Jian-guo HE Ran ding National Engineering Research Center for Advanced Rolling Technology University of Science and Technology Beijing Beijing Laboratory of Metallic Materials and Processing for Modern Transportation Baotai Group Co. Ltd.

Microstructure and mechanical properties of two kinds of non-magnetic high manganese steels with and without Nb addition which experienced the same rolling and heating treatment were investigated by means of scan ning electron microscopy, electron back-scattered diffraction, transmission electron microscopy, X-ray diffraction and tensile test. It was found that the microstructure of the high manganese steel was refined by the Nb addition. Moreover, steel with Nb addition has a higher stacking fault energy which favors the deformation twinning, Twin ning is the most important deformation mechanism in the Nb-bearing steel. Therefore, steel with Nb addition has much higher strength and higher plasticity. The product of tensile strength and total elongation exceeds 61.8 GPa ·%. In addition, steel with Nb addition also has excellent non magnetic property.

关键词： non-magnetic high manganese steel Nb addition rolling twinning mechanical property

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Severe hyperlipemia-induced pseudoerythrocytosis - Implication for misdiagnosis and blood transfusion: A case report and literature review

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World Journal of Clinical Cases 2020年第19期8卷 4595-4602页

作者： Xi-Chen zhao Bo Ju Na Wei Jian ding Fan-Jun Meng Hong-guo zhao Department of Hematology The Central Hospital of Qingdao West Coast New AreaQingdao 266555Shandong ProvinceChina Department of Clinical Laboratory The Central Hospital of Qingdao West Coast New AreaQingdao 266555Shandong ProvinceChina Department of Hematology The Affiliated Hospital of Qingdao UniversityQingdao 266000Shandong ProvinceChina

BACKGROUND Severe hyperlipemia(SHLE)has an impact on the results of many kinds of laboratory *** blood count(CBC)examination by automated blood cell counter(ABCC)is a quick and convenient measurement for screening abnormalities of blood cells that are triggered by various pathogenic insults in disease diagnosis and for monitoring changes in the treatment of existing hematological ***,CBC results are frequently affected by many intrinsic and extrinsic factors from blood samples,such as in the setting of hypergammaglobulinemia and certain *** could also affect CBC *** SUMMARY A 33-year-old Chinese male presented with painful foot numbness and abdominal *** was initially misdiagnosed as having a myeloproliferative neoplasm(MPN)because of the marked abnormalities in CBC examination by the *** evaluation of the bone marrow smears and biopsy showed no evidence of *** mutations in Breakpoint cluster regions-Abelson murine leukemia viral oncogene homologue 1(BCR-ABL1),Janus kinase 2(JAK2),calreticulin(CALR),myeloproliferative leukemia virus(MPL),and colony-stimulating factor 3 receptor(CSF3R)were *** noticed the thick chylomicron layer on blood samples and the dramatically fluctuating CBC results,we speculated that the fat droplets formed by shaking the blood samples in the setting of SHLE were mistakenly identified as blood cells due to the limited parameters of ***,we removed a large part of the chylomicron layer and then reexamined the CBC,and the CBC results,as we expected,differed significantly from that of the sample before the chylomicron layer was *** significant differences had been validated by the subsequently repeated laboratory tests by measuring dual blood samples that the chylomicron layer was removed in one sample and was not in another,and comparing the CBC *** tomography reexamination of the upper abdomen revealed an exudative lesion

关键词： Case report Hyperlipemia Fat droplet Pancreatitis Pseudoerythrocytosis Blood transfusion indication

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Width Compensation and Correction for the Plan View Pattern Control Function on Plate Mill

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Journal of Harbin Institute of Technology(New Series) 2013年第5期20卷 31-35页

作者： Zhi-Jie Jiao Chun-Yu He Zhong zhao Jing-guo ding State Key Laboratory of Rolling and Automation Northeastern University

Research works on width compensation and correction were carried out in order to eliminate the effects of the PVPC （ plan view pattern control） on width accuracy of plate mill. The thickness correction calculation formula was derived for compensation the width deviation caused by PVPC function, and the formula is unified under the thinning and thickening conditions. In order to improve the width calculation accuracy, width spread calculation process was modified with dividing one large reduction pass to several small reduction calculation steps. The thickness wedge was simplified to rectangle based on the volume constant principle, and the width spread model for PVPC was constructed. The width compensation and correction for the PVPC functions are used for the online control process, and the Product dimension accuracy is improved. With the decrease of Crop losses, the Droduct yield was increased with 0. 2%.

关键词： Lplate mill plan view pattern control width correction and compensation width spread model

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Influence of Inactivation Treatment of Ship′s Ballast Water on Corrosion Resistance of Ship Steel Plate

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Journal of Iron and Steel Research International 2013年第11期20卷 85-89页

作者： WANG Zi-xi zhao Jing-hui JIA Xiao-hong FANG Jian-guo ZHANG Bo ding guo-qing Department of Precision Instruments and Mechanology State Key Laboratory of TribologyTsinghua University Powder Metallurgy Division Advanced Technology and Materials Co. COSCO Shipbuilding Industry Co. Qingdao Marine Corrosion Institute China Iron and Steel Research Institute Group

The effect of seawater after ultraviolet inactivation on corrosion of a shipbuilding steel plate was investiga- ted by means of natural corrosion potential experiments and immersion corrosion test. The effects of natural seawater and treated seawater after ultraviolet inactivation on corrosion of the selected steel plate samples were compared with each other. The results showed that there was no obvious change in the chemical composition of treated seawater compared with natural seawater. The corrosion potential slightly increased by 10 mV, whereas the corrosion rate rose significantly by 20~. The experiments verified the naturally formed biofilm in the natural seawater for the inhi- bition of corrosion on the shipbuilding steel plate. The possible influences of ballast water treatment on biofilm by ul- traviolet and electrolysis inactivation under the condition of practical usage were also investigated. And it was found that ballast water treatment methods with no continuous disinfection could protect original tank biofilm structure, reducing the intensity of tank corrosion.

关键词： corrosion ballast water biofilm

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An AND-type 1T-FeFET array with robust write and read operations

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Science China(Information Sciences) 2025年

作者： Jiacheng XU Jiayi zhao Hongrui ZHANG Haoji QIAN Jiani GU Bowen CHEN Gaobo LIN Rongzong SHEN Xinda SONG Huan LIU Yian ding Minglei MA Miaomiao ZHANG Xiao YU Bing CHEN Ran CHENG Gaobo XU Huaxiang YIN Yan LIU Jiajia CHEN Chengji JIN Genquan HAN Hangzhou Institute of Technology and School of Microelectronics Xidian University Zhejiang Lab College of Integrated Circuits Zhejiang University Key Laboratory of Microelectronics Devices and Integrated Technology Institute of MicroelectronicsChinese Academy of Sciences

HfO2-based ferroelectric field-effect transistor （FeF ET） has become a promising solution for next-generation embedded non-volatile memory （NVM） owing to its complementary metal-oxide-semiconductor （CMOS） compatibility,small footprint, high performance, and non-destructive readout [1]. Recent research of HfO2-based FeF ET has focused on the device operation mechanisms as well as reliability issues such as the interplay between polarization switching and charge trapping/detrapping [2], read-after-write latency [3] and endurance degradation [4]. It has been demonstrated that endurance higher than 1010cycles with negligible read-after-write latency is possible if the gate stack of FeF ET is well engineered [5].

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JIT在苏南中小型电子制造企业深入应用的探讨

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中国制造业信息化（学术版） 2010年第1期39卷 29-33页

作者：金青朱惠芳彭伏期甘信华丁兆国常州工学院管理科学与工程系江苏常州213022 江苏国光信息产业股份有限公司江苏常州213015

阐述了JIT生产方式对苏南地区中小型电子制造企业的适宜性,以及苏南中小企业推行JIT生产方式存在的优势;提出了将JIT方式深入应用的3个方向,即瓶颈环节"准时物料供应"的解决方案,JIT生产系统的整体架构而不是仅仅只是"看板系统",以及深... 详细信息

阐述了JIT生产方式对苏南地区中小型电子制造企业的适宜性,以及苏南中小企业推行JIT生产方式存在的优势;提出了将JIT方式深入应用的3个方向,即瓶颈环节"准时物料供应"的解决方案,JIT生产系统的整体架构而不是仅仅只是"看板系统",以及深入推行的实施手段。

关键词： JIT生产方式(准时制生产方式) 中小企业电子制造业苏南地区生产方式

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Cross-coupled controller design for triaxial motion systems based on second-order contour error estimation

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Science China(Technological Sciences) 2015年第7期58卷 1209-1217页

作者： zhao Huan ZHU LiMin ding Han State Key Laboratory of Digital Manufacturing Equipment and Technology Huazhong University of Science and Technology State Key Laboratory of Mechanical System and Vibration Shanghai Jiao Tong University

The cross-coupled control(CCC)is widely applied to reduce contour errors in contour-following *** such situation,the contour error estimation plays an important ***,the linear or second-order estimation approach is adopted for biaxial motion systems,whereas only linear approach is available for triaxial *** this paper,the second-order contour error estimation,which was presented in our previous work,is utilized to determine the variable CCC gains for motion control systems with three *** integrated stable motion control strategy,which combines the feedforward,feedback and CCC controllers,is developed for multiaxis CNC *** results on a triaxial platform indicate that the CCC scheme based on the second-order estimation,compared with that based on the linear one,significantly reduces the contour error even in the conditions of high tracking feedrate and small radius of curvature.

关键词： cross-coupled controller contour error cross-coupled gains triaxial motion system computer numerical control (CNC)

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