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Re-identifying Grateloupia yangjiangensis(Rhodophyta, Halymeniaceae) based on morphological observations, life history and rbcL sequence analyses

中国化学工程学报（英文版） 2024年第4期 94页

作者： xiaoming zhang Wen Xie Xiaolei Zhou Wenjie zhang Jiawei Wen Xin Wang Guoyong Huang Shengming Xu

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Acta Oceanologica Sinica 2014年第4期33卷 77-84页

作者： WANG Hongwei GUO Shaoru zhang xiaoming ZHAO Dan zhang Wen LUAN Rixiao College of Life Sciences Liaoning Normal University Dalian Natural History Museum

On the basis of morphological observations, life history and molecular phylogeny, Grateloupia yangjiangensis, which is similar to G. filicina, G. orientalis, G. catenata, and G. ramosissima in appearance, was re-examined. The results are as follows：（1） the auxiliary-cell ampullae of G. yangjiangensis were of Grateloupia type, thalli was fleshy and gelatinous in texture, and the erect axes were compressed; the cortex was 0.25–0.30 mm thick, consisting of five to seven outer layers, and there were five inner layers of triangular or stellate cells;（2） there was no filamentous stage in the development of the carpospores;（3） the ribulose-1,5-bisphosphate carboxylase/oxygenase gene（rbcL） sequence of four G. yangjiangensis examined showed that there was no intergeneric divergence among them, and for the phylogenetic tree, four sequences of G. yangjiangensis formed a single monophyletic subclade within the large Grateloupia clade of Halymeniaceae. In conclusion, G. yangjiangensis was a single species within the genus Grateloupia. This research provided criterion for identification and cultivation of G. yangjiangensis.

关键词： Grateloupia yangjiangensis Halymeniaceae Rhodophyta morphological observations life history rbcL

Three-dimensional temperature prediction in cylindrical turning with large-chamfer insert based on a modified slip-line field approach

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Chinese Journal of Aeronautics 2021年第10期34卷 265-281页

作者： Cheng HU Kejia ZHUANG Yuanwei TANG Jian WENG xiaoming zhang Han DING Hubei Digital Manufacturing Key Laboratory School of Mechanical and Electronic EngineeringWuhan University of TechnologyWuhan 430070China Institute of Advanced Materials and Manufacturing Technology Wuhan University of TechnologyWuhan 430070China AECC Guizhou Liyang Aviation Power CO.LTD Guiyang 550000China State Key Laboratory of Digital Manufacturing Equipment and Technology Huazhong University of Science and TechnologyWuhan 430074China

Chamfered inserts have found broader applications in metal cutting process especially in high-performance machining of hard-to-cut materials for their excellent edge resistance and cutting ***,excessive heat generation and resulting high cutting temperature eventually cause severe tool wear and poor surface integrity,which simultaneously limits the optimal selection of machining *** the present study,an analytical thermal–mechanical model is proposed for the prediction of the three-dimensional(3-D)temperature field in cylindrical turning with chamfered round insert based on a modified slip-line field ***,an innovative discretization method is introduced in a general 3-D coordinate system to provide a comprehensive demonstration of the irregular cutting geometry and heat generation ***,a plasticity-theory-based slip-line field model is developed and employed to determine the intensities and geometries of every elementary heat sources in Primary Deformation Zones(PDZ),Secondary Deformation Zones(SDZ)and Dead Metal Zones(DMZ).At last,a 3-D analytical model is suggested to calculate the temperature increases caused by the entire heat sources and associated *** maximum cutting temperature region predicted is found existing upon the chip-tool contact area rather than the tool ***,the rationalities of cutting parameters employed are analyzed along with theoretical material removal rates and ensuing maximum cutting *** results indicate that the cutting conditions with large depth of cut and high cutting speed are more desirable than those with high feed *** proposed models are respectively verified through a series of 3-D Finite Element(FE)simulations and dry cutting experiments of Inconel 718 with chamfered round *** agreement has been reached between the predictions and simulations as well as the measurements,which confirms the correctness and effectiveness of the presented analy

关键词： Analytical model Chamfered round insert Dead metal zone Prediction of temperature Slip-line field

The flexural property and its synergistic mechanism of multibody molded beetle elytron plates

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Science China(Technological Sciences) 2020年第5期63卷 768-776页

作者： YU XinDi zhang xiaoming CHEN JinXiang ZHAO CaiQi ZHAO TiDong FU YaQin School of Civil Engineering Southeast UniversityNanjing 211189China College of Materials and Textiles Zhejiang Sci-Tech UniversityHangzhou 310018China

To improve the applications of beetle elytron plates(BEPs,which are biomimetic sandwich plates inspired by beetle elytra),the flexural performance and its synergistic mechanism of multibody molded BEPs were investigated via cantilever testing and finite element method(FEM).The results are summarized as follows.(1)Although debonding damage causes failure of the multibody molded BEPs and honeycomb plate and the reasonable range of trabecular size for BEPs is narrow,both the optimal loading capacity per mass and failure deformation of the BEPs are over two times those of the honeycomb plate.(2)A flexural synergistic mechanism is revealed in the trabecular-honeycomb core structure of BEPs;this mechanism causes the maximum deformation of core structure to gradually transfer from the honeycomb wall to the trabeculae with the increase inη(the ratio of the trabecular radius to the distance between the center points of two trabeculae),which means the different stretching behaviors in these core structures.(3)Unlike the compressive mechanism of BEPs,by controlling and balancing the deformation degrees of the trabeculae and honeycomb walls,the flexural mechanism achieves a minimum core deformation and an optimal flexural *** results suggest a qualitative relationship between the deformation behavior of trabecular-honeycomb core structure and bending performance of the whole BEP,and provide a solid foundation for subsequent research and the considerable application potential of this biomimetic sandwich structure in many fields.

关键词： beetle elytra BEP biomimetic structure sandwich structure honeycomb plate flexural property

三维打印模具辅助以问题为基础教学法对住院医师批判性思维能力的影响

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中国高等医学教育 2024年第2期 107-109页

作者：吕杰张韬张学民李伟浩张小明北京大学人民医院北京100044

目的:探讨三维打印模具辅助以问题为基础教学法(PBL-3DM)对住院医师批判性思维(CT)能力的影响。方法:选取我院专科住院医师37人进行PBL-3DM教学并调研教学前后CT变化。结果:教学前对象CTDI-CV值为(228.38±5.30)分,83.8%对象CT未达正性,... 详细信息

目的:探讨三维打印模具辅助以问题为基础教学法(PBL-3DM)对住院医师批判性思维(CT)能力的影响。方法:选取我院专科住院医师37人进行PBL-3DM教学并调研教学前后CT变化。结果:教学前对象CTDI-CV值为(228.38±5.30)分,83.8%对象CT未达正性,24.3%没有CT,7个维度能力均欠佳。教学2周4周和12周后的CTDI-CV逐升为(245.40±5.32)分、(278.29±6.28)分和(326.46±3.37)分,负性CT比例降到27.0%无CT比例为0%;12周时除分析能力和认知成熟度,各维度评分均显著提高(P<0.05)。研究生医师负性比例最高(35.1%),规培医师比例最低(21.6%),培训后改善最明显的是研究生医师,进修医师改善度最低。结论:PBL-3DM教学法有助于提升不同背景住院医师的批判性思维能力。

关键词：以问题为基础的教学法三维打印模具批判性思维医学教育

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Vibration properties and transverse shear characteristics of multibody molded beetle elytron plates

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Science China(Technological Sciences) 2020年第12期63卷 2584-2592页

作者： zhang xiaoming YU XinDi CHEN JinXiang PAN LongCheng HU LiPing FU YaQin School of Civil Engineering Southeast UniversityNanjing 211189China College of Materials and Textiles Zhejiang Sci-Tech UniversityHangzhou 310018China

This study utilized cantilever experiments to investigate the vibration properties of multibody molded beetle elytron plates(BEPs),which is a type of biomimetic sandwich plate inspired by beetle elytra;the corresponding shear characteristics were further revealed by a finite element method(FEM). The following results were obtained:(1) Experimental results suggest that the maximum displacement response of the BEPs was about 25% less than that of a honeycomb plate with almost the same first natural frequency,which indicates that a BEP with reasonable structural parameters has the potential to replace a honeycomb plate to achieve better vibration performance;(2) The trabecular structure not only enhanced the shear stiffness of the core layer in column areas but also the skins in the honeycomb wall areas,thus changing the distribution of the shear force in the different components and improving the mechanical performances of the BEP;and(3) Although this enhancement effect from trabeculae was not uniform,the average shear force proportion of the skins(or core structure) in the entire BEP structure was very close to that of the honeycomb plate. Therefore,the shear calculation assumption used for honeycomb plates is still applicable in the *** results provide an experimental basis for the design and application of BEPs and inspiration for the development of related products in vibrational environments.

关键词： beetle elytra biomimetic structure sandwich structure honeycomb plate vibration shear

Dolomitization and the causes of dolomitization dolomite reservoir

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Chinese Journal Of Geochemistry 2012年第2期31卷 147-154页

作者： FAN Bojiang zhang xiaoming zhang Jian PANG Xiongqi LIU Chenglin Research Center of Basin and Reservoir China University of Petroleum Beijing 102249 China State Key Laboratory of Petroleum Resource and Prospecting China University of Petroleum Beijing 102249 China Jidong Oil Company PetroChina Tangshan 063004 China

This paper utilizes multi-methods,such as core observation,slice identification,isotope analysis,trace element analysis,fluid inclusion technique and so on,to study the causes of the dolomite in the Nanpu Sag and the origins of the dolomite *** study results show that the forming environment of dolomite in the Nanpu Sag is a fresh-water lake environment,and the dolomite is the product of dolomitization which is caused by volcanic thermal fluids in the Early Dongying *** the development of intergranular pores in the dolomitization process,a lot of dissolved pores/vugs and fractures were formed by denudation in the later periods because of the influence of thermal fluids including the associated fluids of volcanic activities and the expelled hydrocarbon fluids of the source *** the whole,these secondary dissolution spaces greatly enhance the reservoir ability of the dolomite,and there are enough reservoir spaces in the dolomite in the Nanpu Sag.

关键词：白云岩储层成因南堡凹陷湖泊环境地热流体火山活动储集空间同位素分析

少年精神障碍住院患者心理剧治疗效果的定性研究

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中国心理卫生杂志 2024年第3期38卷 213-217页

作者：刘彦茹王希林刘华清张晓鸣王志仁北京回龙观医院北京100096 北京大学第六医院北京大学精神卫生研究所国家卫生健康委员会精神卫生学重点实验室(北京大学)国家精神心理疾病临床医学研究中心(北京大学第六医院)北京100083

目的:探讨心理剧治疗对少年精神障碍住院患者的效果。方法:在某医院住院儿童病房招募精神障碍患者22例(年龄12~18岁),根据访谈提纲对连续参加4次心理剧治疗的患者(均按常规服用精神科药物)进行半结构式访谈,采用扎根理论的方法对访谈资... 详细信息

目的:探讨心理剧治疗对少年精神障碍住院患者的效果。方法:在某医院住院儿童病房招募精神障碍患者22例(年龄12~18岁),根据访谈提纲对连续参加4次心理剧治疗的患者(均按常规服用精神科药物)进行半结构式访谈,采用扎根理论的方法对访谈资料进行深度分析,采用自编心理剧治疗参与感受及评价调查表调查患者参加心理剧治疗后的感受、收获或变化。结果:访谈分析发现,心理剧治疗的效果包括减轻症状、提高自尊程度、促进功能康复和提高社会适应能力4个方面。自编心理剧治疗参与感受及评价调查表结果显示,排名前4位的是促进人际关系、有趣、愿意继续参加和提高自信。结论:心理剧治疗对少年精神障碍住院患者具有辅助治疗作用,可促进自尊水平和社交能力的提升。

关键词：扎根理论心理剧治疗精神障碍少年

低氧胁迫对瘤背石磺Toll样受体4、血细胞和免疫酶活性的影响

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水产学报 2024年第6期48卷 144-156页

作者：肖海明土志涵饶榕城陈锡林钱畅张小明沈和定上海海洋大学上海市水产动物良种创制与绿色养殖协同创新中心上海海洋大学水产种质资源发掘与利用教育部重点实验室上海海洋大学水产科学国家级实验教学示范中心

为探究瘤背石磺面临低氧环境时固有免疫的应激机制，实验以RACE法对瘤背石磺TLR4基因进行全长克隆，并进行生物信息学分析，测定了低氧胁迫下瘤背石磺TLR4基因的表达变化，以及分析了血细胞活力和溶菌酶(LSZ)活性、肝脏中超氧化物歧化酶... 详细信息

为探究瘤背石磺面临低氧环境时固有免疫的应激机制，实验以RACE法对瘤背石磺TLR4基因进行全长克隆，并进行生物信息学分析，测定了低氧胁迫下瘤背石磺TLR4基因的表达变化，以及分析了血细胞活力和溶菌酶(LSZ)活性、肝脏中超氧化物歧化酶(SOD)和碱性磷酸酶(ALP)活性。结果显示，瘤背石磺TLR4基因cDNA全长共3 605 bp，包括编码956 aa氨基酸的2 817 bp开放阅读框。系统进化树表明，瘤背石磺TLR4基因与光滑双脐螺TLR4基因的进化地位较为接近。qRT-PCR结果显示，TLR4基因在瘤背石磺7个组织中均有表达，其中表达量最高的是肝脏。低氧胁迫下，各组织中TLR4基因的表达量皆显著上升，其中神经节在4 h时率先达到峰值。此外，血细胞活力、LSZ活性、ALP活性都是呈先下降后上升的趋势，而SOD活性呈先上升再下降再上升的趋势，波动幅度最为明显。研究结果初步说明了TLR4的生理功能，为探究潮间带生物免疫系统的低氧应激机制提供理论参考。

关键词：瘤背石磺 TLR4 基因克隆低氧胁迫固有免疫

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基于水下磁感应定位技术的研究

工业仪表与自动化装置 2024年第2期 86-90页

作者：韩滨澧张晓明李欣甜中北大学电子测试技术国家重点实验室山西太原030051 中北大学仪器科学与动态测试教育部重点实验室山西太原030051

针对水下目标定位系统中发射信号端的位置不明确的问题,提出三维正交线圈磁感应定位的方法,以弥补单个线圈磁场信息较少的缺点,有效解决单个线圈严重依赖轴线对准且无法实现空间定位的问题。建立了单个线圈和全向线圈的磁偶极子数学模型... 详细信息

针对水下目标定位系统中发射信号端的位置不明确的问题,提出三维正交线圈磁感应定位的方法,以弥补单个线圈磁场信息较少的缺点,有效解决单个线圈严重依赖轴线对准且无法实现空间定位的问题。建立了单个线圈和全向线圈的磁偶极子数学模型,对磁感应强度的三分量值与其空间位置的几何关系进行分析,通过仿真和试验验证了基于三维正交线圈的定位技术可行性。仿真和试验结果表明,发射端坐标的相对误差分别为:X轴为6.70%和2.09%,Y轴为7.73%和5.64%,Z轴为8.74%和2.06%,距离的相对误差在7.0%和4.3%以内。

关键词：磁感应定位三维正交线圈磁场磁偶极子