检索结果-南通市图书馆

基于ANSYS Workbench的高密机织滤料动态形变模拟与分析

在线全文

学校读者我要写书评

暂无评论

纺织学报 2024年第9期45卷 63-69页

作者：田少萌张丽石浩轩徐阳江南大学纺织科学与工程学院江苏无锡214122 南通醋酸纤维有限公司江苏南通226008

为优化过滤机织物的设计,进一步探究机织滤料在受压时的动态形变及孔径变化规律,依据在实际应用时过滤机织物的纱线线密度、经纬密、面密度等参数,借助建模软件Solidworks建立织物三维细观模型,利用有限元软件ANSYS Workbench对不同压... 详细信息

为优化过滤机织物的设计,进一步探究机织滤料在受压时的动态形变及孔径变化规律,依据在实际应用时过滤机织物的纱线线密度、经纬密、面密度等参数,借助建模软件Solidworks建立织物三维细观模型,利用有限元软件ANSYS Workbench对不同压力条件下织物的形变情况进行模拟,分析织物最大变形量、变形轮廓以及孔径变化趋势,并将模拟结果与实验结果进行比较。结果表明:织物最大变形量在圆心处,变形量沿直径呈梯度递减;随着压力升高,织物中心的变形量呈非线性增加,织物的变形轮廓曲线类似于正弦曲线;在压力作用下织物孔径增大,且中心区域孔径大于远离圆心处孔径,同一周向孔径大小和形状也会发生改变。模拟结果与实验结果具有较好的一致性。

关键词：机织物过滤数值模拟动态形变孔径分布

An integrated machine learning model for accurate and robust prediction of superconducting critical temperature

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2023年第3期78卷 232-239,I0007页

作者： Jingzi Zhang Ke Zhang shaomeng x. Yi Li Chengquan Zhong Mengkun Zhao Hua-Jun Qiu Mingyang Qin x.-D.x.ang Kailong Hu x. Lin School of Materials Science and Engineering Harbin Institute of TechnologyShenzhen 518055GuangdongChina Blockchain Development and Research Institute Harbin Institute of TechnologyShenzhen 518055GuangdongChina State Key Laboratory of Advanced Welding and Joining Harbin Institute of TechnologyHarbin 150001HeilongjiangChina School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001HeilongjiangChina Department of Materials Science and Engineering&Department of Physics Southern University of Science and TechnologyShenzhen 518055GuangdongChina

Discovering new superconductors via traditional trial-and-error ex.erimental approaches is apparently a time-consuming process,and the correlations between the critical temperature(Tc) and material features are still *** rise of machine learning(ML) technology provides new opportunities to speed up inefficient ex.loration processes,and could potentially uncover new hints on the unclear *** this work,we utilize open-source materials data,ML models,and data mining methods to ex.lore the correlation between the chemical features and Tcvalues of superconducting *** further improve the prediction accuracy,a new model is created by integrating three basic algorithms,showing an enhanced accuracy with the coefficient of determination(R2) score of 95.9 % and root mean square error(RMSE) of 6.3 *** average marginal contributions of material features towards Tcvalues are estimated to determine the importance of various features during prediction *** results suggest that the range thermal conductivity plays a critical role in Tcprediction among all element ***,the integrated ML model is utilized to screen out potential twenty superconducting materials with Tcvalues beyond 50.0 *** study provides insights towards Tcprediction to accelerate the ex.loration of potential high-Tcsuperconductors.

关键词： Superconductors Integrated machine learning Superconducting critical temperature

基于视景匹配的重载列车自主辅助定位方法研究

在线全文

学校读者我要写书评

暂无评论

现代工程科技 2024年第13期3卷 93-96页

作者：汪少猛石江北京交通大学机械与电子控制工程学院北京100044 国能运输技术研究院有限责任公司北京100190

列车定位是列车安全运行的重要问题,现有列车定位技术主要依靠列车速度传感器及地面应答器进行定位,但是重载铁路沿线地形多山,隧道众多。轨旁设备不可用,卫星信号受到极大削减甚至受遮蔽,这些都严重影响列车自主定位精度。提出将图像... 详细信息

列车定位是列车安全运行的重要问题,现有列车定位技术主要依靠列车速度传感器及地面应答器进行定位,但是重载铁路沿线地形多山,隧道众多。轨旁设备不可用,卫星信号受到极大削减甚至受遮蔽,这些都严重影响列车自主定位精度。提出将图像检索技术集成运用到列车自主定位中,基于线路视景特征的图像检索定位技术,采用车载相机实时采集处理系统对地面线路特征图进行检测,并将检测后的结果与电子地图内存储的线路特征进行匹配,得到匹配特征对应的位置,并以此作为列车定位信息,有效实现了重载列车的自主辅助定位。

关键词：视景匹配重载列车自主定位深度学习

Research on thermal risk and decomposition behavior of methyl nitrite

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Engineering 2020年第8期28卷 2131-2136页

作者： Haoyu Zhai shaomeng Wang Diankun Chen x.anying Cheng Chuanx.n x.e College of Environment and Safety Engineering Qingdao University of Science and TechnologyQingdao 266042China

The thermal hazards of methyl nitrite(MN)were investigated in the present *** determination and evaluation of MN decomposition were conducted using a C600 micro *** thermal runaway reaction characteristics of the compound under different initial pressures were obtained using a VSP2 *** kinetic parameters of MN were obtained by regression fitting and calculation of the microthermal ex.erimental *** ex.erimental and calculated results demonstrated that the potential ex.losion risk of MN is very *** addition,there was a high energy barrier in the early stage of the uncontrolled decomposition of MN;however,once the decomposition reaction was initiated,the subsequent decomposition was easily *** the conditions of adiabatic simulation,the possibility that the reaction was uncontrolled increases with the initial temperature and pressure of the system,and there is a great potential safety risk.

关键词： Methyl nitrite Process safety Thermal risk

基于人工蜂群优化支持向量机的儿童流感疾病的预测模型研究

在线全文

学校读者我要写书评

暂无评论

今日药学 2024年第1期34卷 74-80页

作者：丁维靖张少萌裴云涛河北省儿童医院河北石家庄050031 河北省药品审评中心河北石家庄050031

目的利用人工蜂群优化SVM的预测分析模型(ABC-SVM),改善SVM缺陷的同时提高模型的预测准确度,并运用此模型对儿童流感疾病进行分析预测,为医院提供合理的数据支撑,以更好地应对流感季。方法根据河北省儿童医院在2022~2023年采集的151 d... 详细信息

目的利用人工蜂群优化SVM的预测分析模型(ABC-SVM),改善SVM缺陷的同时提高模型的预测准确度,并运用此模型对儿童流感疾病进行分析预测,为医院提供合理的数据支撑,以更好地应对流感季。方法根据河北省儿童医院在2022~2023年采集的151 d的磷酸奥司他韦颗粒用药量作为研究数据,抽取其中的前101 d作为训练样本,剩余的50 d数据作为测试样本,利用MATLAB R2018b软件编程实现数据的学习与预测,对比预测数据与实际数据的相对误差,且采用决定系数(R2)、均方根误差(RMSE)、平均绝对百分比误差(MAPE)和平均绝对误差(MAE)对所建模型进行对比分析,验证ABC-SVM的预测精度。结果ABC-SVM模型误差的各项指标均最小,且与实际数据相对误差值最小,预测效果最佳。结论本文所建立的ABC-SVM预测模型能预测流感季,对流感控制和预防具有重要意义。

关键词：疾病预测儿童流感支持向量机人工蜂群季节趋势模型

THz trapped ion model and THz spectroscopy detection of potassium channels

在线全文

学校读者我要写书评

暂无评论

Nano Research 2022年第4期15卷 3825-3833页

作者： Kaicheng Wang shaomeng Wang Lix.a Yang Zhe Wu Baoqing Zeng Yubin Gong School of Electronic Science and Engineering University of Electronic Science and Technology of ChinaChengdu 610054China School of Physics University of Electronic Science and Technology of ChinaChengdu 610054China

Advanced molecular dynamics(MD)simulation and infrared(IR)spectroscopy have been widely adopted to reveal the detailed dynamic process of high-speed selective permeability of potassium *** these MD simulations cannot avoid the choice of empirical molecular force fields and high transmembrane voltages(as driving electric fields for ions)far ex.eeding physiological ***,the IR spectroscopy method usually requires isotope labels for carbonyl groups of the channels,which may change the original permeation ***,we build the terahertz(THz)trapped ion model for the selectivity filter(SF)of potassium channels KcsA based on the density functional theory(DFT)calculation of ion *** this model,the zero-point energy of trapped ions and quantum tunneling effect provide the physical basis for near diffusion limited permeation rates of ions and ex.lain the high driving electric field in MD *** calculations of zero-point energy and tunneling probability show that the quantum effect assisted knock-on mechanism may help to realize the physiological functions of potassium ***,based on the trapped ion model,we calculated the ion decoherence timescale under the influence of protein environmental *** use the quantum optics method to describe the interaction between THz waves and the trapped *** the novel THz spectroscopy approaches through the THz resonance fluorescence and the intense field non-resonant effect are presented *** are ex.ected to be isotope label-free detective methods of the rapid ion permeation dynamics.

关键词： potassium channels trapped ions zero-point energy quantum tunneling effect terahertz spectrum density functional theory(DFT)calculation

Effect of Co on the martensitic transformation,crystal structure and magnetization of Ni_(52.5) Mn_(23.5) Ga_(24) based ferromagnetic shape memory alloys

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Science Bulletin 2011年第8期56卷 796-802页

作者： YAN shaomeng PU Jian CHI Bo LI Jian School of Materials Science and Engineering State Key Laboratory of Material Processing and Die & Mould Technology Huazhong University of Science & Technology Wuhan 430074 China

Five(Ni52.5Mn23.5Ga24)100-x.ox.x.= 0,2,4,6,8) alloys were prepared by arc melting,and the effects of Co addition on the martensitic phase transformation,crystal structure and magnetization were *** phase transformation temperatures Ms,Mf,As and Af are proportional to the content of Co in the(Ni52.5Mn23.5Ga24)100-x.ox.alloys,which appears to be due to the variation in the valance electron *** Curie temperature is sensitive to the composition of the *** the amount of Co changes,both the Co-Mn ex.hange interaction and the distance between Mn atoms ***,in turn,affect the Curie temperature and magnetization behavior of the *** martensite phases in all the alloys are domained in three different orientations,the domain boundary was determined to belong to the family of {112} lattice planes.

关键词：铁磁形状记忆合金马氏体相变晶体结构磁化强度 Co 真空电弧熔炼相变温度电子浓度

20736-node weighted max.cut problem solving by quadrature photonic spatial Ising machine

在线全文

学校读者我要写书评

暂无评论

Science China(Information Sciences) 2023年第12期66卷 289-290页

作者： x.n YE Wenjia ZHANG shaomeng WANG x.aox.an YANG Zuyuan HE State Key Laboratory of Advanced Optical Communication Systems and Networks Shanghai Jiao Tong University Peng Cheng Laboratory

The max.cut problem is one of the fundamental NP-hard problems in combinatorial optimization, which can describe the practical applications such as data clustering, machine scheduling, and image recognition. This prob...

关键词：

基于光学显微及电镜分析技术的土霉素片溶出行为解析

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

河北医药 2024年第13期46卷 2055-2060页

作者：张少萌张冬杨天风丁维靖河北省药品审评中心石家庄市050090 河北省药品医疗器械检验研究院河北省儿童医院

目的建立土霉素片溶出度测定方法,考察不同企业产品体外溶出行为的差异;利用光学显微、电镜分析技术追溯引发溶出行为差异的根本原因。方法采用桨法-HPLC法测定溶出度,采用光学显微及电镜分析技术对片芯中土霉素与辅料形态与溶出行为... 详细信息

目的建立土霉素片溶出度测定方法,考察不同企业产品体外溶出行为的差异;利用光学显微、电镜分析技术追溯引发溶出行为差异的根本原因。方法采用桨法-HPLC法测定溶出度,采用光学显微及电镜分析技术对片芯中土霉素与辅料形态与溶出行为进行分析。结果土霉素在18.5~92.6μg/mL浓度范围内线性关系良好,平均回收率为98.4%,RSD为0.7%(n=9),方法准确可靠。偏光显微镜法和扫描电镜法的分析结果显示制剂中原、辅料的晶体形态与存在状态与药物的溶出行为存在一定的相关性。结论对于多晶型药物,利用光学显微及电镜分析与溶出度相结合的方法可更有效、全面地评价其口服固体制剂的质量。

关键词：土霉素片溶出行为光学显微电镜分析药物评价