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Combining field-modulating electroosmotic vortex and insulating post to manipulate particles based on dielectrophoresis

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Applied Mathematics and Mechanics(English Edition) 2021年第3期42卷 371-386页

作者： Bing YAN Bo CHEN Fanyun LIU Jiankang WU yongliang xiong School of Civil Engineering and Mechanics Huazhong University of Science and TechnologyWuhan 430074China

The dielectrophoretic technology has been one of the most frequently applied microfluidic technologies to manipulate *** way of a combination of controlled electroosmotic micro-vortices and dielectrophoresis to manipulate particles of different sizes was proposed in our previous ***,the thickness of the modulating electrode is *** practice,when the thickness of the modulating electrode increases,the channel flux increases,while the ability of the vortex to capture the particles *** this study,a new method combining the field-modulating electroosmotic vortex and the insulating post is proposed to improve the manipulating capability of the field-modulated electroosmotic vortex to *** results indicate that there are three great advantages as the insulating post is placed on the channel wall on the same side of the modulating ***,the capturing ability of the vortex to particles is greater due to the reduction of channel flux and the squeezing ***,the range of regulating channel flux to achieve the optimal separation is ***,the separation efficiency improves since the perfect separation can be achieved at a higher flow ***,the effects of the location and the size of the insulating post on particle separation are analyzed in *** present work could provide the reference for the application of the DEP technology.

关键词： electroosmotic vortex dielectrophoresis(DEP) insulating post particle separation

Effect of Joule heating on the electroosmotic microvortex and dielectrophoretic particle separation controlled by local electric field

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Chinese Physics B 2021年第11期30卷 401-410页

作者： Bing Yan Bo Chen yongliang xiong Zerui Peng School of Aerospace Engineering Huazhong University of Science and TechnologyWuhan 430074China

Dielectrophoresis(DEP)technology has become important application of microfluidic technology to manipulate *** using a local modulating electric field to control the combination of electroosmotic microvortices and DEP,our group proposed a device using a direct current(DC)electric field to achieve continuous particle *** this paper,the influence of the Joule heating effect on the continuous separation of particles is *** show that the Joule heating effect is caused by the local electric field,and the Joule heating effect caused by adjusting the modulating voltage is more significant than that by driving ***,a non-uniform temperature distribution exists in the channel due to the Joule heating effect,and the temperature is the highest at the midpoint of the modulating *** channel flux can be enhanced,and the enhancement of both the channel flux and temperature is more obvious for a stronger Joule heating *** addition,the ability of the vortices to trap particles is enhanced since a larger DEP force is exerted on the particles with the Joule heating effect;and the ability of the vortex to capture particles is stronger with a stronger Joule heating *** separation efficiency can also be increased because perfect separation is achieved at a higher channel *** optimization of the separation device,such as the convective heat transfer coefficient of the channel wall,the length of modulating electrode,and the width of the channel,is performed.

关键词： dielectrophoresis microvortices Joule heating effect particle separation

On the Transient Numerical Simulation of Solid Rocket Motor by Coupling Quasi One⁃Dimension Internal Flow with Three⁃Dimension Propellant Grain Burnback

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Journal of Harbin Institute of Technology(New Series) 2021年第5期28卷 15-27页

作者： Juan Duan yongliang xiong Ningdong Hu Department of Mechanics Huazhong University of Science and TechnologyWuhan 430074China Hubei Key Laboratory of Engineering Structural Analysis and Safety Assessment Wuhan 430074China

The quasi one⁃dimension compressible flowfield coupled to the three⁃dimension propellant grain regression solved by the level⁃set method was used to simulate the transient internal ballistics of solid rocket ***⁃dimension flowfield instead of three⁃dimension can save computational cost on the premise of calculation accuracy because the radial and azimuthal variations parameters have little contribution to the internal *** grain regression in real⁃time could provide accurate geometrical information for simulation.A combination of flowfluid solver and grain regression can reappear in a relatively real internal ballistic flowfield,so it is good for further studying the instability of solid rocket *** level⁃set equations,the total variation⁃diminishing second⁃order Runge⁃Kutta method for temporal derivatives and a fifth⁃order weighted⁃essentially⁃non⁃oscillatory scheme for spatial derivatives were *** total variation⁃diminishing MacCormack method was used to discrete the Euler equations in flowfield *** modules of this code were tested in this study:one is the burning rate module and the other is the nozzle erosion *** show that the burning rate influenced the solid rocket motor efficiency,and the velocity profile in the chamber was affected by the nozzle shape,and the nozzle erosion could influence the head⁃end pressure spike.

关键词： transient compressible solver internal ballistics simulation level⁃set method solid rocket motor

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一种融合轨检信息的GNSS动态单历元多路径误差提取方法

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武汉大学学报（信息科学版） 2021年第6期46卷 905-912页

作者：张芮熊永良雷飞西南交通大学地球科学与环境工程学院四川成都611756 中国电子科技集团公司第十研究所四川成都610036

随着中国高铁的发展,全球导航定位系统(global navigation satellite system,GNSS)动态定位技术在列车定位及轨道检测中具有广阔的应用前景,但其精度目前难以满足轨道检测要求。多路径效应是影响GNSS动态定位精度的一个主要误差源,目前... 详细信息

随着中国高铁的发展,全球导航定位系统(global navigation satellite system,GNSS)动态定位技术在列车定位及轨道检测中具有广阔的应用前景,但其精度目前难以满足轨道检测要求。多路径效应是影响GNSS动态定位精度的一个主要误差源,目前已有的多路径误差削弱方法大多适用于静态测量环境,尚无有效的方法削弱动态多路径误差。分别采用传统算法和以轨检几何信息作为约束条件的算法解算GNSS观测数据,并将受到多路径影响的测量结果与轨检信息进行对比分析,同时利用小波多尺度分解算法分离坐标残差序列中的多路径误差和噪声,得到"干净"的轨道坐标序列。实验结果表明,由于信息量增加,融合轨检信息的GNSS数据解算方法可以有效提取多路径误差和观测噪声;利用小波相关分析能进一步削弱坐标域中的多路径误差,提高GNSS动态定位的精度,满足高铁轨道测量的需求。

关键词：轨检信息 GNSS动态定位多路径误差坐标域小波

低温热液成矿作用中铊有机络合物搬运形式的研究

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矿床地质 2010年第1期29卷 177-181页

作者：熊永良 Sandia National Laboratories 4100 National Parks Highway Carlsbad New Mexico 88220 USA

文章依据等库伦反应外推原理,计算了铊的醋酸(TlAc0)、柠檬酸(TlCit2-)、苹果酸(TlMal-)、草酸(TlOx-)及琥珀酸(TlSuc-)络合物在25～100℃之间的稳定常数。将这些稳定常数输入EQ3/6的***热力学数据库后,在75℃和100℃温度条件下,对铊的... 详细信息

文章依据等库伦反应外推原理,计算了铊的醋酸(TlAc0)、柠檬酸(TlCit2-)、苹果酸(TlMal-)、草酸(TlOx-)及琥珀酸(TlSuc-)络合物在25～100℃之间的稳定常数。将这些稳定常数输入EQ3/6的***热力学数据库后,在75℃和100℃温度条件下,对铊的诸物种于低温热液中在不同pH值条件下的分配进行了计算。计算表明,在中性及偏碱性条件下,在75℃还原环境中,自由铊离子(Tl+)所占比例约为55%,TlHS0约占10%,而其余则为铊的有机络合物,并以铊的柠檬酸络合物占绝对优势。在75℃氧化环境中,自由铊离子约占55%,而铊的有机络合物则为45%左右。在100℃还原环境中,自由铊离子所占比例约为20%,TlHS0约占20%,其余则为铊的有机络合物。在100℃氧化环境中,自由铊离子所占比例约为30%,其余则为铊的有机络合物。因而笔者认为,铊的有机络合物,尤其是铊的柠檬酸络合物,在低温热液中对于铊的溶解及搬运起着重要的作用。

关键词：地球化学铊矿床络合物稳定常数 SIT模式等库伦反应外推原理有机物质

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水下航行体超空泡外形控制的数值研究

哈尔滨工程大学学报 2011年第12期32卷 1556-1562页

作者：胡晓郜冶熊永亮哈尔滨工程大学航天与建筑工程学院黑龙江哈尔滨150001

为研究非稳态条件下的航行体空泡形态随空化器阻力的变化规律,采用FLUENT6.2的动网格技术,对传统变阻力空化器的非定常空泡流进行了模拟,比较了不同中心锥角的变阻力空化器的阻力系数和空泡外形,其中阻力系数的计算结果与试验数据吻合较... 详细信息

为研究非稳态条件下的航行体空泡形态随空化器阻力的变化规律,采用FLUENT6.2的动网格技术,对传统变阻力空化器的非定常空泡流进行了模拟,比较了不同中心锥角的变阻力空化器的阻力系数和空泡外形,其中阻力系数的计算结果与试验数据吻合较好;研究了传统控制方案下的空泡外形响应速度,结果显示空泡尺寸的变化要滞后于阻力系数;最后提出了一种新型的可变侧向力空化器的控制方案,模拟结果证明空化器上半周突出0.1Dn时,可以获得相当于30%阻力的升力.

关键词：可变空化器空泡流变阻力动网格数值模拟

A 256 Gb/s electronic−photonic monolithically integrated transceiver in 45 nm CMOS

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Journal of Semiconductors 2024年第7期45卷 7-10页

作者： Ang Li Qianli Ma Yujun Xie yongliang xiong Yingjie Ma Han Liu Ye Jin Menghan Yang Guike Li Haoran Yin Minye Zhu Yang Qu Peng Wang Daofa Wang Wei Li Liyuan Liu Nan Qi Ming Li Key Laboratory of Optoelectronic Materials and Devices Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China Institute of Semiconductors Chinese Academy of SciencesBeijing 100083China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100190China School of Electronic Electrical and Communication EngineeringUniversity of Chinese Academy of SciencesBeijing 100049China

With the explosive development of artificial intelligence(AI),machine learning(ML),and high-performance comput-ing(HPC),the ever-growing data movement is asking for high density interconnects with higher bandwidth(BW),lower power and lower latency[1−3].The optical I/O leverages silicon photonic(SiPh)technology to enable high-density large-scale integrated photonics.

关键词： Gb/s transceiver monolithic

基于CEEMDAN-LSTM组合方法的海平面变化预测分析

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大地测量与地球动力学 2023年第9期43卷 899-903页

作者：熊思亦熊永良西南交通大学地球科学与环境工程学院成都市611756

为提高海平面变化预测精度,将自适应噪声完备集合经验模态分解(CEEMDAN)与长短期记忆网络(LSTM)相结合,采用“分解-预测-重组”思路,提出一种海平面变化预测组合方法CEEMDAN-LSTM。结果表明,相对于直接使用LSTM神经网络进行预测(MAE=16.... 详细信息

为提高海平面变化预测精度,将自适应噪声完备集合经验模态分解(CEEMDAN)与长短期记忆网络(LSTM)相结合,采用“分解-预测-重组”思路,提出一种海平面变化预测组合方法CEEMDAN-LSTM。结果表明,相对于直接使用LSTM神经网络进行预测(MAE=16.87 mm, RMSE=21.51 mm),以及已有的EEMD-BP神经网络组合方法(MAE=10.4 mm, RMSE=15.44 mm),CEEMDAN-LSTM组合方法预测表现最优(MAE=8.89 mm, RMSE=11.34 mm),具有最低的预测误差。

关键词： CEEMDAN LSTM 海平面变化融合预测组合方法

GPS参考站对流层湿延迟近实时估计的三步滤波算法

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武汉大学学报（信息科学版） 2015年第7期40卷 918-923页

作者：刘宁张永志熊永良长安大学地质工程与测绘学院陕西西安710054 西南交通大学地球科学与环境工程学院四川成都610031

利用参考站坐标已知的先验信息,基于组合后的超快星历,提出了一种参考站对流层湿延迟近实时估计的三步Kalman滤波算法,该方法先利用Kalman滤波分离宽巷模糊度与伪距多路径误差,再基于电离层无关组合模型,启动Kalman滤波器进行L1模糊度... 详细信息

利用参考站坐标已知的先验信息,基于组合后的超快星历,提出了一种参考站对流层湿延迟近实时估计的三步Kalman滤波算法,该方法先利用Kalman滤波分离宽巷模糊度与伪距多路径误差,再基于电离层无关组合模型,启动Kalman滤波器进行L1模糊度与相对对流层湿延迟的分离,然后利用将正确固定的L1双差模糊度进行回代的方法,重新构建Kalman滤波器来估计准确的相对对流层湿延迟参数,通过实例验证了该方法的可行性和正确性。

关键词： GPS参考站超快星历对流层湿延迟 Kalman滤波整周模糊度