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Four new species of free-living marine nematode from the sea areas of China

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Journal of Oceanology and Limnology 2021年第4期39卷 1547-1558页

作者： Jing sUN mian HUANG Yong HUANG College of Life sciences Liaocheng UniversityLiaocheng 252059China Department of Marine Organism Taxonomy and Phylogeny Institute of OceanologyChinese Academy of SciencesQingdao 266071China University of Chinese Academy of sciences Beijing 100049China

Two new species of genus Diplopeltoides Gerlach,1962 and two new species of genus Minolaimus Vitiello,1970 were described based on recently collected specimens from marine sediments of the south China sea and the East China sea,*** conoicaudatus *** characterized by annulated cuticle;tiny terminal buccal cavity;short cephalic setae about 2-μm long;loop-shaped amphideal fovea without sclerotized plate;slender and arcuate spicules;triangular gubernaculum possessing a small dorso-caudal apophysis;female with two opposed and reflexed *** longifoveatus *** characterized by its papilliform cephalic sensilla;long and narrow amphideal fovea with fine transverse striations;inverse s-shaped spicules with a dorsally bent manubrium;gubernaculum with dorso-caudal apophysis;cylindrical tail with round terminal *** multisupplementatus *** characterized by cuticle with lateral differentiation of three longitudinal rows of large dots,spiral amphideal fovea with seven turns,pharynx cylindrical without posterior bulb,spicules arcuated with central lamella,gubernaculum arcuate and parallel to spicule,without dorso-caudal apophysis,a papilliform and 29 cup-shaped precloacal supplement;tail conical with long flagelliform *** apicalis *** characterized by cuticle with lateral differentiation of three longitudinal rows of larger dots from the middle of pharynx to the conical portion of tail and a longitudinal row of pores in the pharyngeal region and precloacal region;spiral amphidial fovea with four turns and close to anterior end;pharynx cylindrical with oval posterior bulb,spicules arcuated and proximal end bent dorsally,gubernaculum with a broad curved dorsal apophysis;two sucked-like and six cup-shaped cuticularized precloacal supplements;tail conico-cylindrical with slightly enlarged *** keys to species of Diplopeltoides and Minolaimus were provided.

关键词： Diplopeltoides conoicaudatus sp.nov. Diplopeltoides longifoveatus sp.nov. Minolaimus multisupplementatus sp.nov. Minolaimus apicalis sp.nov. East China sea south China sea

多项超声技术联合探查颈动脉斑块预测缺血性脑卒中复发的价值

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中华全科医学 2024年第7期22卷 1204-1208页

作者：张茜勉丽王霞省部共建中亚高发病成因与防治国家重点实验室新疆医科大学第二附属医院超声诊断科新疆乌鲁木齐830063

目的探讨二维和三维超声、超声造影(CEUs)和剪切波弹性成像(sWE)联合探查颈动脉斑块并分析其预测缺血性脑卒中(Is)复发的价值。方法筛选新疆医科大学第二附属医院2021年10月—2023年1月收治的首发Is合并颈动脉粥样硬化斑块患者95例,根... 详细信息

目的探讨二维和三维超声、超声造影(CEUs)和剪切波弹性成像(sWE)联合探查颈动脉斑块并分析其预测缺血性脑卒中(Is)复发的价值。方法筛选新疆医科大学第二附属医院2021年10月—2023年1月收治的首发Is合并颈动脉粥样硬化斑块患者95例,根据是否复发分为复发组和未复发组。采用logistic回归分析研究影响Is患者复发的危险因素。采用ROC曲线分析多项超声技术联合预测Is复发的价值。结果失访5例,有37例患者复发,复发率为41.11%,复发组高血压占比高于未复发组,药物依从性好占比则低于未复发组(Ps-血流Ⅲ~Ⅳ级占比及二维-动脉内中膜厚度(IMT)、三维-颈动脉斑块总面积(TPA)值高于未复发组,杨氏模量平均值则低于未复发组(Pstic回归分析显示,CEUs-血流Ⅲ~Ⅳ级、二维-IMT高和三维-TPA大及杨氏模量平均值低是影响Is患者复发的危险因素,药物依从性好则是其保护因素(Ps-血流Ⅲ~Ⅳ级单项预测Is患者复发的AUC分别为0.674、0.717、0.729、0.746,联合预测AUC为0.908,高于单项检测(PsWE、CEUs超声技术通过评估颈动脉斑块不稳定性,在预测Is复发方面具有一定的临床价值,四者联合价值更高。

关键词：缺血性脑卒中颈动脉斑块三维超声超声造影剪切波弹性成像技术

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疲劳对操纵员监视行为影响机制的脑电试验

中国安全科学学报 2024年第9期34卷 50-58页

作者：张勉易灿南蒋复量胡鸿吴文张思佳南华大学资源环境与安全工程学院湖南衡阳421001 湖南工学院安全与管理工程学院湖南衡阳421002

为优化操纵员疲劳风险管理,降低疲劳对操纵员作业绩效的影响,完成疲劳诱发前后的监视任务,首先,以某压水堆核电厂数字化主控室为背景,设计2-back范式的疲劳诱发任务和oddball范式的监视任务,并以低、中、高3种复杂度的控制界面为素材;然... 详细信息

为优化操纵员疲劳风险管理,降低疲劳对操纵员作业绩效的影响,完成疲劳诱发前后的监视任务,首先,以某压水堆核电厂数字化主控室为背景,设计2-back范式的疲劳诱发任务和oddball范式的监视任务,并以低、中、高3种复杂度的控制界面为素材;然后,采集23名被试的主观疲劳评分、行为数据和脑电(EEG)信号,用相关疲劳指标验证疲劳诱发的有效性;最后,对比分析疲劳诱发前后3种不同复杂度界面下被试的行为数据、事件相关电位P3成分的差异性。结果表明:最短30 min、最长60 min的2-back任务能够诱发疲劳;疲劳或界面复杂度增加都会导致监视行为的绩效水平下降,疲劳状态下高复杂度界面与中复杂度界面之间的绩效水平差异最大;其中,正确率下降4.9%,反应时增加10.4%;P3潜伏期的变化趋势与反应时一致,P3波幅仅在高复杂度界面下显著增大。结合绩效数据和事件相关电位数据变化特征分析表明:界面复杂度的提高会加深疲劳对操纵员脑力负荷的负面影响。

关键词：疲劳操纵员监视行为脑电(EEG) 界面复杂度

精神分裂症和重性抑郁障碍与快感缺失有关的近红外光谱成像研究

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中国神经精神疾病杂志 2024年第9期50卷 533-539页

作者：吴月李冕李涵翛然丁金琦梁素改浙江大学医学院附属精神卫生中心/杭州市第七人民医院心身二科杭州310013浙江中医药大学第四临床医学院浙江大学医学院附属精神卫生中心/杭州市第七人民医院转化精神医学研究室浙江大学医学院附属精神卫生中心/杭州市第七人民医院物理诊疗中心

目的基于功能性近红外光谱技术(functional near-infrared spectroscopy,fNIRs)言语流畅性任务(verbal fluency task,VFT)探索精神分裂症(schizophrenia,sCZ)患者和重性抑郁障碍(major depressive disorder,MDD)患者与快感缺失有关的脑区激活差异。方法纳入45例首发MDD患者、31例首发sCZ患者和45名健康对照(healthy controls,HC)。采用17项汉密尔顿抑郁量表(17-item Hamilton depression scale,HAMD-17)、阳性与阴性症状量表(positive and negative syndrome scale,PANss)和斯奈思-汉密尔顿快感量表(snaith-Hamilton pleasure scale,sHAPs)评估受试者的临床症状。所有受试者使用“白”“北”“大”3个汉字组词以完成VFT,同时进行48通道fNIRs检测,应用Matlab Homer2软件提取任务下氧合血红蛋白(oxy-hemoglobin,Oxy-Hb)浓度变化的信息。结果3组在执行fNIRs-VFT任务时,与HC组相比,sCZ组患者在双侧额中回、额上回、额下回,右侧颞上回及左侧中央后回Oxy-Hb浓度降低(包括25个通道,PsCZ组在双侧额上回、左侧额中回及右侧颞上回Oxy-Hb浓度降低(包括6个通道,PsHAPs评分与右侧额上回(通道26、42)的Oxy-Hb浓度呈负关联(β=-5.46,P=0.02;β=-5.01,P=0.01)。结论首发sCZ患者和首发MDD患者双侧额中回和左侧额上回、额下回、中央后回激活异常,右侧颞上回和额上回激活异常或是sCZ的神经生物学标志物,右侧额上回激活异常或与MDD快感缺失有关。

关键词：精神分裂症重性抑郁障碍快感缺失言语流畅性任务功能性近红外光谱额颞叶氧合血红蛋白

statistical inference for the nonparametric and semiparametric hidden Markov model via the composite likelihood approach

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science China Mathematics 2023年第3期66卷 601-626页

作者： mian Huang Yue Huang Weixin Yao school of statistics and Management Shanghai University of Finance and EconomicsShanghai 200433China Department of statistics University of CaliforniaRiversideRiversideCA 92521USA

In this paper, we propose a new estimation method for a nonparametric hidden Markov model(HMM), in which both the emission model and the transition matrix are nonparametric, and a semiparametric HMM, in which the transition matrix is parametric while emission models are nonparametric. The estimation is based on a novel composite likelihood method, where the pairs of consecutive observations are treated as independent bivariate random variables. Therefore, the model is transformed into a mixture model, and a modified expectation-maximization(EM) algorithm is developed to compute the maximum composite *** systematically study asymptotic properties for both the nonparametric HMM and the semiparametric HMM. We also propose a generalized likelihood ratio test to choose between the nonparametric HMM and the semiparametric HMM. We derive the asymptotic distribution and prove the Wilk’s phenomenon of the proposed test statistics. simulation studies and an application in volatility clustering analysis of the volatility index in the Chicago Board Options Exchange(CBOE) are conducted to demonstrate the effectiveness of the proposed methods.

关键词： nonparametric HMM nonhomogeneous HMM semiparametric estimate composite likelihood generalized likelihood ratio test

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螺旋桨桨叶根部断裂飞脱轨迹数值仿真

航空发动机 2024年第4期50卷 142-149页

作者：温庆刘冠冕程志航杨康智魏猛中航通飞华南飞机工业有限公司广东珠海519040

螺旋桨桨叶断裂飞脱轨迹对飞机的安全性有重要的影响。为了研究螺旋桨桨叶根部断裂后的运动过程,采用数值模拟方法进行了仿真分析,并与风洞试验结果对比。将求解区域划分为10个网格区域,对其中3个螺旋桨旋转区域单独划分网格,通过滑移... 详细信息

螺旋桨桨叶断裂飞脱轨迹对飞机的安全性有重要的影响。为了研究螺旋桨桨叶根部断裂后的运动过程,采用数值模拟方法进行了仿真分析,并与风洞试验结果对比。将求解区域划分为10个网格区域,对其中3个螺旋桨旋转区域单独划分网格,通过滑移网格进行数据传递,对有飞脱桨叶的螺旋桨的6个桨叶分别设置重叠网格。采用螺旋桨真实旋转的非定常方法获得周期性稳定的空间流场,当飞脱桨叶到达指定位置后,求解桨叶的6自由度运动方程,计算桨叶的飞行轨迹。结果表明:在短时间内,该螺旋桨的桨叶飞脱后的运动轨迹主要受惯性力的影响,而气动力的影响不大;飞脱桨叶的桨根在第0.015 s左右与后继桨叶的桨尖相撞,与测力风洞试验的断桨事故诊断结果相符。

关键词：螺旋桨重叠网格根部断裂飞行轨迹数值模拟航空发动机

同方期刊数据库博看期刊评论

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“00后”大学生劳动价值观及教育引导研究

上海理工大学学报（社会科学版） 2024年第1期46卷 83-88页

作者：周强熊冕秦治国上海理工大学管理学院上海200093 上海理工大学学生处上海200093

做好劳动教育是培养德智体美劳全面发展型人才的重要举措,是落实立德树人根本任务的路径之一。通过对“00后”大学生进行调查,了解劳动教育现状等方面内容,挖掘出高校劳动实践教育内容设置、学生功利化思想、重脑力而轻体力劳动、劳动... 详细信息

做好劳动教育是培养德智体美劳全面发展型人才的重要举措,是落实立德树人根本任务的路径之一。通过对“00后”大学生进行调查,了解劳动教育现状等方面内容,挖掘出高校劳动实践教育内容设置、学生功利化思想、重脑力而轻体力劳动、劳动认知和劳动行为不一致、培养体系构建等具体问题。就此提出明晰劳动育人意义、全路径推进劳动教育、研究创造性劳动学习经历和构建有效实施机制等对策,以期为劳动教育改革提供参考。

关键词：劳动教育 “00后”大学生对策

Interpretation of appropriate places: state ceremonies and the imperial main halls of the Tang and song dynasties

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Frontiers of Architectural Research 2022年第6期11卷 1007-1029页

作者： mian Guo Yang shen school of Archaeology and Museology Peking UniversityBeijing 100871China school of Architecture Southeast UniversityNanjing 210096China Member of Key scientific Research Base of Traditional Wooden Architecture(southeast University) State Administration for Cultural HeritageNanjing 210096China

This paper aims to inquiry on the dialectical relationships between Chinese architecture’s form and function in the horizon of long-term historical evolution,by clarifying how the histories of imperial main halls and state ceremonies relate to and interact with each other during the Tang and song *** imperialmain halls are themost archetypical and accomplished ones among traditional Chinese buildings,and their function is primarily ritual rather than *** these magnificent buildings are indisputably considered the crowning achievement of Chinese architectural history,how the built space cooperates with ritual practices did not receive deserved *** the thorough reading of voluminous official ritual documents and comprehensive utilization of archaeological discoveries together with visual materials,the research presents a broad understanding of the asynchronous developments of the ground-level architectural arrangement and the ritual configuration across these *** specifically depicted are details of how architecture engaged in the ritual narration and was used as an apparatus to articulate emperor-courtier relationships.

关键词： Ritual function Architecture and ritual Chinese architecture Architectural meaning Form and function

EFFECTs OF sURFACE WAVEs AND MARINE sOIL PARAMETERs ON sEABED sTABILITY

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Applied Mathematics and Mechanics(English Edition) 2001年第8期22卷 904-916页

作者： LIN mian(林缅) LI Jia-chun(李家春) Institute of Mechanics CAS Beijing 100080 P R China Institute of Mechanics CAS Beijing 100080 P R China

Based on the Yamamoto's soil model by considering the Coulomb friction effects, the wave-induced seabed instability has been investigated. An analytical solution is derived for soil response of a finite depth seabed tinder surface water wave. The effects of wave parameters and soil characteristics on the seabed instability are addressed for three types of soil. Finally, the roles of Coulomb friction stability are then analyzed as well.

关键词： seabed instability shear failure liquefaction