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Predicting protein subchloroplast locations:the 10th anniversary

Frontiers of Computer Science 2021年第2期15卷 1-11页

作者： jian SUN Pu-feng DU College of Intelligence and Computing Tianjin UniversityTianjin300350China

Chloroplast is a type of subcellular organelle in green plants and *** is the main subcellular organelle for conducting photosynthetic *** proteins,which localize within the chloroplast,are responsible for the photosynthetic process at molecular *** chloroplast can be further divided into several *** in different compartments are related to different steps in the photosynthetic *** the molecular function of a protein is highly correlated to the exact cellular localization,pinpointing the subchloroplast location of a chloroplast protein is an important step towards the understanding of its role in the photosynthetic *** process for determining protein subchloroplast location is always costly and time ***,computational approaches were developed to predict the protein subchloroplast locations from the primary *** the last decades,more than a dozen studies have tried to predict protein subchloroplast locations with machine learning *** sequence features and various machine learning algorithms have been introduced in this research *** this review,we collected the comprehensive information of all existing studies regarding the prediction of protein subchloroplast *** compare these studies in the aspects of benchmarking datasets,sequence features,machine learning algorithms,predictive performances,and the implementation *** summarized the progress and current status in this special research *** also try to figure out the most possible future works in predicting protein subchloroplast *** hope this review not only list all existing works,but also serve the readers as a useful resource for quickly grasping the big picture of this research *** also hope this review work can be a starting point of future methodology studies regarding the prediction of protein subchloroplast locations.

关键词： subchloroplast locations sequence features performance measures online services machine learning

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Reconstruction of vector static magnetic field by different axial NV centers using continuous wave optically detected magnetic resonance in diamond

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Chinese Physics B 2019年第4期28卷 337-341页

作者： jian-feng Ye Zheng Jiao Kun ma Zhi-Yong Huang Hai-jiang Lv feng-jian jiang School of Information Engineering Huangshan University

We carried out a proof-of-principle demonstration of the reconstruction of a static vector magnetic field involving adjacent three nitrogen-vacancy(NV) sensors with corresponding different NV symmetry axes in a bulk diamond. By means of optical detection of the magnetic resonance(ODMR) techniques, our experiment employs the continuous wave(CW) to monitor resonance frequencies and it extracts the information of the detected field strength and polar angles with respect to each NV frame of reference. Finally, the detected magnetic field relative to a fixed laboratory reference frame was reconstructed from the information acquired by the multi-NV sensor.

关键词： diamond defect optical detection magnetic resonance magnetometer

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Twin-solute, twin-dislocation and twin-twin interactions in magnesium

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Journal of magnesium and Alloys 2023年第10期11卷 3427-3462页

作者： Yuan Yue jian Wang jian-feng Nie Department of materials Science and Engineering Monash UniversityVictoria 3800Australia Department of Mechanical&materials Engineering University of Nebraska-LincolnLincolnNE 68583USA

magnesium alloys have received considerable research interest due to their lightweight,high specific strength and excellent ***,their plastic deformation is more complicated compared to cubic materials,primarily because their low-symmetry hexagonal closepacked(hcp) crystal *** twinning is a crucial plastic deformation mechanism in magnesium,and twins can affect the evolution of microstructure by interacting with other lattice defects,thereby affecting the mechanical *** paper provides a review of the interactions between deformation twins and lattice defects,such as solute atoms,dislocations and twins,in magnesium and its *** review starts with interactions between twin boundaries and substitutional solutes like yttrium,zinc,silver,as well as interstitial solutes like hydrogen and *** is followed by twin-dislocation interactions,which mainly involve those between {10■2} tension or {10■1} compression twins and , or type *** following section examines twin-twin interactions,which occur either among the six variants of the same {10■2} or {10■1} twin,or between different types of *** resulting structures,including twin-twin junctions or boundaries,tension-tension double twin,and compression-tension double twin,are discussed in ***,this review highlights the remaining research issues concerning the interactions between twins and lattice defects in magnesium,and provides suggestions for future work in this area.

关键词： magnesium alloys Twin-solute interactions Twin-dislocation interactions Twin-twin interactions Microstructure Mechanical properties

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Nickel sulfide-based energy storage materials for high-performance electrochemical capacitors

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Rare Metals 2021年第2期40卷 353-373页

作者： Ramyakrishna Pothu Ravi Bolagam Qing-Hong Wang Wei Ni Jin-feng Cai Xiao-Xin Peng Yue-Zhan feng jian-Min ma School of Physics and Electronics Hunan UniversityChangsha410082China School of Chemistry and materials Science Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional MaterialsJiangsu Normal UniversityXuzhou221116China Institute for Advanced Study Chengdu UniversityChengdu610106China Faculty of Technology University of OuluOulu90014Finland Yiyang Wanjingyuan Electronics Co. Ltd.Yiyang413000China Key Laboratory of materials Processing and Mold(Zhengzhou University) Ministry of EducationZhengzhou UniversityZhengzhou450002China

Supercapacitors are favorable energy storage devices in the field of emerging energy technologies with high power density,excellent cycle stability and environmental *** performance of supercapacitors is definitively influenced by the electrode *** sulfides have attracted extensive interest in recent years due to their specific merits for supercapacitor ***,the distribution of electrochemically active sites critically limits their electrochemical *** improvements have been achieved through various strategies such as building synergetic structures with conductive substrates,enhancing the active sites by nanocrystallization and constructing nanohybrid architecture with other electrode *** article overviews the progress in the reasonable design and preparation of nickel sulfides and their composite electrodes combined with various bifunctional electric double-layer capacitor(EDLC)-based substances(e.g.,graphene,hollow carbon)and pseudocapacitive materials(e.g.,transition-metal oxides,sulfides,nitrides).Moreover,the corresponding electrochemical performances,reaction mechanisms,emerging challenges and future perspectives are briefly discussed and summarized.

关键词： Supercapacitors Nickel sulfides Hybrid structures Energy storage materials Pseudocapacitance

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Experimental investigation of vector static magnetic field detection using an NV center with a single first-shell ^(13)C nuclear spin in diamond

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Chinese Physics B 2018年第5期27卷 481-486页

作者： feng-jian jiang jian-feng Ye Zheng Jiao Jun jiang Kun ma Xin-Hu Yan Hai-jiang Lv School of Information Engineering Huangshan University Huangshan 245041 China

We perform a proof-of-principle experiment that uses a single negatively charged nitrogen–vacancy（NV） color center with a nearest neighbor ^13C nuclear spin in diamond to detect the strength and direction（including both polar and azimuth angles） of a static vector magnetic field by optical detection magnetic resonance（ODMR） technique. With the known hyperfine coupling tensor between an NV center and a nearest neighbor ^13C nuclear spin, we show that the information of static vector magnetic field could be extracted by observing the pulsed continuous wave（CW） spectrum.

关键词： color centers optical detection magnetic resonance (ODMR) magnetometer

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Thermal hazard assessment of TKX-50-based melt-cast explosive

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Defence Technology（防务技术） 2022年第9期18卷 1546-1551页

作者： Jun-feng Wang Shu-sen Chen Shao-hua Jin Qing-hai Shu feng-lei Huang jian Ruan Xiao ma Kun Chen School of materials Science and Engineering Beijing Institute of TechnologyBeijingChina State Key Laboratory of Explosion Science and Technology Beijing Institute of TechnologyBeijingChina Gansu Yinguang Chemical Industry Group Co.Ltd BaiyinChina

In the present study, thermal hazards of TNT and DNAN used as the molten binder in TKX-50-based meltcast explosives were comparatively studied through accelerating rate calorimeter(ARC) and Cook-off experiments. Two kinds of ARC operation modes were performed to investigate the thermal safety performance under adiabatic conditions(HWS mode) and constant heating(CHR mode). The obtained results demonstrated that at both heating modes, DNAN/TKX-50 outperformed TNT/TKX-50 from the thermal safety point of view. However, the sensitivity to heat of the samples was reverse because of the different heating modes. In addition, the results of thermal hazard assessment obtained from the cookoff experiment complied with ARC analysis which indicated the molten binder TNT replaced by DNAN would reduce the hazard of the TKX-50 melt cast explosive. Furthermore, the results of cook-off experiments also showed that DNAN/TKX-50 outperformed TNT/TKX-50 from the aspect of thermal stability, which was consistent with the result of CHR mode because of the similar heating process.

关键词： Dihydroxylammonium 5,5’-bistetrazole-1,1’-diolate(TKX-50) 2,4-Dinitroanisole(DNAN) Thermal safety performance Accelerating rate calorimeter(ARC) Cook-off

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红细胞生成素对大鼠脑缺血再灌注后神经元保护作用

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山西医科大学学报 2006年第7期37卷 688-690页

作者：何娅冯建军马琳陈松盛王辉西安交通大学第二医院老年病科西安710004

目的观察促红细胞生成素(erythropoietin,EPO)对大鼠脑缺血再灌注后的梗死体积及神经功能缺损评分的影响。方法线栓法复制大鼠左侧中动脉缺血再灌注模型,缺血2 h,于再灌注开始时经腹腔注入重组人促红细胞生成素(3 000U/kg),再灌注后2 h,... 详细信息

目的观察促红细胞生成素(erythropoietin,EPO)对大鼠脑缺血再灌注后的梗死体积及神经功能缺损评分的影响。方法线栓法复制大鼠左侧中动脉缺血再灌注模型,缺血2 h,于再灌注开始时经腹腔注入重组人促红细胞生成素(3 000U/kg),再灌注后2 h,12 h,24 h,48 h,72 h,7 d及10 d测定大鼠神经功能缺损评分后,断头取脑,用2%氯化三苯基四氮唑(TTC)标记梗死体积。结果对照组缺血再灌注后2 h已经出现梗死灶,随着时间的延长,梗死灶体积逐渐增大,24 h时梗死体积最大。EPO治疗组与相应时间点对照组相比,梗死灶体积明显缩小(P<0.05),神经功能缺损评分明显减少(P<0.05)。结论24 h时达最大,EPO能使梗死灶体积明显缩小、神经功能缺损评分明显减少,对损伤神经元有保护作用。

关键词：脑梗死脑缺血再灌注损伤红细胞生成素大鼠

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PARAMETRIC IDENTIFICATION AND SENSITIVITY ANALYSIS FOR AUTONOMOUS UNDERWATER VEHICLES IN DIVING PLANE

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Journal of Hydrodynamics 2012年第5期24卷 744-751页

作者： XU feng ZOU Zao-jian YIN jian-chuan CAO jian School of Naval Architecture Ocean and Civil Engineering Shanghai Jiao Tong University Shanghai 200240China School of Naval Architecture Ocean and Civil Engineering and State Key Laboratory of Ocean EngineeringShanghai Jiao Tong University Shanghai 200240 China College of Shipbuilding Engineering Harbin Engineering University Harbin 150001 China

The inherent strongly nonlinear and coupling performance of the Autonomous Underwater Vehicles （AUV）, maneuvering motion in the diving plane determines its difficulty in parametric identification. The motion parameters in diving plane are obtained by executing the Zigzag-like motion based on a mathematical model of maneuvering motion. A separate identification method is put forward for parametric identification by investigating the motion equations. Support vector machine is proposed to estimate the hydrodynamic derivatives by analyzing the data of surge, heave and pitch motions. Compared with the standard coefficients, the identified parameters show the validation of the proposed identification method. Sensitivity analysis based on numerical simulation demonstrates that poor sensitive derivative gives bad estimation results. Finally the motion simulation is implemented based on the dominant sensitive derivatives to verify the reconstructed model.

关键词： parametric identification Autonomous Underwater Vehicles (AUVs) support vector machine sensitivity analysis

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Effects of heat treatment on microstructure and mechanical properties of Mg-6Zn-4Sm-0.4Zr alloy

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China Foundry 2018年第2期15卷 103-109页

作者： Xiao-feng Huang Yu Zhang feng Guo jian-chang Yang Ying ma Yuan Hao State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals Lanzhou University of Technology

A new rare earth magnesium alloy(Mg-6 Zn-4 Sm-0.4 Zr, wt.%) was prepared by permanent mould casting. The microstructure and mechanical properties of the alloy sample in as-cast and various heat treatment situations were characterized with an optical microscope(OM), X-ray diffractometer(XRD), scanning electron microscope(SEM) equipped with energy dispersive spectroscope(EDS), transmission electron microscope(TEM) and mechanical tests at room temperature, respectively. The experimental results show that the as-cast alloy mainly consists of α-Mg, eutectic Mg_2Zn_3, MgZnSm and Mg_(41)Sm_5. These eutectic phases with continuous or semicontinuous morphology principally distribute along grain boundaries. Almost all the eutectic compounds dissolve in α-Mg and the grains have no obvious growth trend after optimum solution treatment at 490 °C for 18 h. Meanwhile, the ultimate tensile strength(UTS) of 229 MPa and elongation(EL) to rupture of 9.78% can be achieved through the optimal solution treatment, which increase by 37 MPa and 57.74%, respectively, compared with that of the as-cast alloy. Further aging treatments at 200 °C for different durations lead to the conspicuous increment of mechanical properties and prominent age-hardening response. Peak-aged alloy(treated at 200 °C for 12 h) reveals better mechanical properties(UTS 258 MPa, EL 9.42%, hardness 73.4 HV) compared with the same alloy treated in other aging conditions, which is mainly ascribed to precipitated Mg_2Zn_3 and MgZn_2 phases. Fracture analysis demonstrates that the as-cast alloy belongs to inter-granular and cleavage fracture patterns, while the solutionized alloy(treated at 490 °C for 18 h) reveals trans-granular and quasi-cleavage fracture modes. For the peak-aged alloy, the fracture pattern obeys the mixture of trans-granular and cleavage modes.

关键词： Mg-6Zn-4Sm-0.4Zr alloy heat treatment microstructure evolution mechanical properties fracture mode

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Numerical study of nonlinear interactions of bi-chromatic progressive deep-water waves

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Journal of Hydrodynamics 2021年第3期33卷 602-620页

作者： jian-jian Xie Yu-xiang ma Guo-hai Dong Xiao-zhou ma State Key Laboratory of Coastal and Offshore Engineering Dalian University of TechnologyDalian116023China

This paper proposes a 3-D non-hydrostatic free surface flow model with a newly proposed general boundary-fitted grid system to simulate the nonlinear interactions of the bi-chromatic deep-water gravity ***,the monochromatic bidirectional and bi-chromatic bidirectional waves of small wave steepness are successively simulated to verify the abilities of the numerical ***,a series of bi-chromatic progressive waves of moderate wave steepness and different crossing angles are simulated and analyzed in *** is found that if the crossing angle is close to or smaller than the resonant angle,apparent discrepancies are observed among the numerical results,the linear wave theory,and the steady third-order ***,the three solutions coincide *** analysis,it is concluded that the discrepancies are caused by the third-order quasi-resonant interactions between the bi-chromatic progressive *** interactions not only could modify the wave spectrum,but could also change the wave shape patterns.

关键词： Non-hydrostatic model nonlinear interactions bi-chromatic progressive waves quasi-resonant interactions

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