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Study of the influence of added water and contained water on structural vibrations and acoustic radiation using different dynamic modeling methods

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Journal of Hydrodynamics 2023年第6期35卷 1157-1167页

作者： Li-bo Qi yue yu huai-cheng Tang Ming-song Zou China Ship Scientific Research Center Wuxi214082China State Key Laboratory of Deep-sea Manned Vehicles Wuxi214082China Taihu Laboratory of Deepsea Technological Science Wuxi214082China

Using the 3-D sono-elasticity method and the simplified nonstructural mass method,the different dynamic modeling methods of the added water for a single-hull structure are first analyzed in this ***,the complete internal flow field method and the simplified nonstructural mass method of the contained water between the double hulls of a double-hull structure are ***,based on the calculation and analysis under multiple conditions,a reasonable and simplified dynamic modeling method of added water and contained water is *** is indicated that the mass of added water for a single-hull structure is closely related to the mass of total underwater displacement of the *** the increase in the analysis frequency,the mass of added water is characterized by first decreasing rapidly and then decreasing gradually and *** contained water between the double hulls is distributed to the pressure hull and the light shell based on the ratio of the impedances of the double *** results can basically reflect the acoustic radiation characteristics of the double-hull structure.

关键词： Added water contained water vibration acoustic radiation dynamic modeling methods

Preparation of Fe_(3)Si and FeSi intermetallic compounds from copper slag by electrochemical method

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Journal of Iron and Steel Research International 2023年第2期30卷 305-316页

作者： Hui Li Chao-long Xue yu Yang Jing-long Liang Key Laboratory of Ministry of Education for Modern Metallurgy Technology and College of Metallurgy and Energy North China University of Science and TechnologyTangshan063009HebeiChina Comprehensive Testing and Analyzing Center North China University of Science and TechnologyTangshan063009HebeiChina

Fe_(3)Si and FeSi intermetallic compounds were prepared by CaCl_(2)-NaCl melt electrolysis at 800℃from the non-magnetic copper slag *** phase transition of the cathode particles with different electrolysis voltages and durations was investigated by X-ray fluorescence spectroscopy,inductively coupled plasma spectroscopy,X-ray diffraction,and scanning electron *** results showed that Fe_(3)Si and FeSi intermetallic compounds can be obtained by one-step electrolysis for 10 h at 3.2 V and two-step electrolysis of 2.5 V for 4 h and 3.2 V for 6 ***,the current efficiency increased from 31.70%of one-step electrolysis to 39.87%of two-step *** formation of Fe_(3)Si and FeSi intermetallic compounds is a gradual evolution process with the increase in Si content,following the formation law of Fe→FeSi→Fe_(3)Si+FeSi→*** metallic impurities of the final product were 1.29 wt.%Mg and 3.85 wt.%Al,respectively.

关键词： Ferroalloy Intermetallic compound Molten salt electrolysis Copper slag Formation process

Influence of Ce and Mn addition on α-Fe morphology in recycled Al-Si alloy ingots

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International Journal of Minerals,Metallurgy and Materials 2013年第9期20卷 890-895页

作者： Chao Fan Si-yuan long huai-de Yang Xiang-jie Wang Jun-cheng Zhang College of Materials Science and Engineering Chongqing University Engineering Training Center Guangxi University of Science and Technology

The influence of Ce or Ce and Mn combined additions on the morphology of a-Fe phases in recycled AloSi alloys was experimentally investigated by microstructure observation and room temperature tensile testing. It is found that Ce modifies the morphology of a-Fe phase from the large Chinese script-like into the individual and fine nodular shape. A combined addition of Ce and Mn results in the promotion of primary a-Fe formation, and their size increases considerably with the increase in Ce content. The mechanism of the above morphological changes was discussed in accordance with the nucleation and growth of a-Fe phase during solidification.

关键词： aluminum-silicon alloys cerium manganese modification morphology

BER analysis of MPSK space-time code with differential detection over correlated block-fading Rayleigh channel

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The Journal of China Universities of Posts and Telecommunications 2008年第2期15卷 18-25页

作者： ZOU yu-long ZHENG Bao-yu Institute of Signal Processing and Transmission Nanjing University of Postsand Telecommunications Nanjing 210003 China

MIMO technology proposed in recent years can effectively combat the multipath fading of wireless channel and can considerably enlarge the channel capacity, which has been investigated widely by researchers. However, its performance analysis over correlated block-fading Rayleigh channel is still an open and challenging objective. In this article, an analytic expression of bit error rate （BER） is presented for multiple phase shift keying （MPSK） space-time code, with differential detection over correlated block-fading Rayleigh channel. Through theoretical analysis of BER, it can be found that the differential space-time scheme without the need for channel state information （CSI） at receiver achieves distinct performance gain compared with the traditional nonspace-time system. And then, the system simulation is complimented to verify the above result, showing that the diversity system based on the differential space-time block coding （DSTBC） outperforms the traditional nonspacetime system with diversity gain in terms of BER. Furthermore, the numerical results also demonstrate that the error floor of the differential space-time system is much lower than that of the differential nonspace-time system.

关键词： differential space-time block code correlated blockfading Rayleigh channel CSI error floor

Microscopic Phase-Field Simulation for the Influence of Interatomic Potential on the Precipitation Process of Ni_(75)Al_(14)Mo_(11) Alloy

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Acta Metallurgica Sinica(English Letters) 2016年第10期29卷 975-984页

作者： Qing-Shuang Ma yu-Chun Jin yu-Hong Zhao huai-Ming Sui Pu Zhang School of Materials Science and Engineering North University of China Yangzhou Feng Ming Metal Products Co. Ltd

Abstract The process of γ＇ phase precipitating from Ni75Al14MO11 is studied by a computational simulation technique based on microscopic phase-field kinetics model. We studied the phase transformation with the purpose of clarifying the influence of the nearest interatomic potential V Ni-Al （the nearest interatomic potential） on the precipitation process of γ＇ phase. The result demonstrates that there are two kinds of ordered phases, respective Llo and L12 in the early stage, and Llo phase transforms into L12 phase subsequently. For L12 phase, Ni atoms mainly occupy α site （face center positions）, while Al and Mo atoms occupy fl sites （the vertex positions）. When VNi-Al is increased by 10 MeV, the occupation probability of Ni atoms on α sites and Al atoms on β sites are enhanced. Enhanced VNi-Al facilitates clustering and ordering of Al atom, which promotes the formation of the γ＇ phase. At last, the simulation result was discussed by employing the thermodynamic stability.

关键词： Interatomic potential Phase transformation Microscopic phase-field Occupation probability

Black hole evaporation and its remnants with the generalized uncertainty principle including a linear term

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Communications in Theoretical Physics 2024年第2期76卷 125-136页

作者： Bo yu Zheng-wen long College of Physics Guizhou UniversityGuiyang550025China

In recent years,researchers have investigated the evaporation of Schwarzschild black holes using various forms of the generalized uncertainty principle(GUP),metric quantum correction,and noncommutative geometry,***,there are differences between the GUP correction and the other two methods in terms of describing the later stages of black hole ***,some studies argue that the GUP with a negative parameter cannot effectively correct black hole evaporation,while others contend that the positivity or negativity of the GUP parameters should not affect the correction *** the above into consideration,we reconsider black hole evaporation with the generalized uncertainty principle including a linear term(LGUP),and examine the case of negative *** results indicate that the evaporation behavior of both Schwarzschild black holes and Reissner–Nordstr?m black holes,under LGUP correction,is consistent with the results of metric quantum correction and non-commutative ***,the negative parameter LGUP can also effectively correct for black hole evaporation.

关键词： black hole evaporation generalized uncertainty principle negative parameter

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骨质疏松症治疗分子靶点的研究进展

食品与药品 2023年第4期25卷 I0016-I0023页

作者：於怀龙张秀华邵华荣刘英梅张小刚郭新艳刘飞山东省药学科学院山东省生物药物重点实验室山东省多糖类药物工程实验室多糖类药物发酵与精制国家地方联合工程实验室山东济南250101

维持骨量和骨密度的骨重塑过程是通过成骨细胞和破骨细胞的平衡作用实现骨量和矿物质稳态。骨重塑平衡被打破,会导致骨质和骨骼强度退化,继而引发骨质疏松症。这种不平衡可能是骨细胞产生的各种分子作用于其他骨细胞并影响细胞活动的结... 详细信息

维持骨量和骨密度的骨重塑过程是通过成骨细胞和破骨细胞的平衡作用实现骨量和矿物质稳态。骨重塑平衡被打破,会导致骨质和骨骼强度退化,继而引发骨质疏松症。这种不平衡可能是骨细胞产生的各种分子作用于其他骨细胞并影响细胞活动的结果。了解这些分子对骨骼的影响有助于确定预防和治疗骨骼疾病的靶点。本文重点介绍了由成骨细胞和破骨细胞产生的分子及其作用机制研究进展,同时也简要概括了骨质疏松症中性激素对这些细胞的调控作用。

关键词：骨质疏松症骨重塑成骨细胞骨细胞破骨细胞

QUANTITATIVE FRET MEASUREMENT BASED ON CONFOCAL MICROSCOPY IMAGING AND PARTIAL ACCEPTOR PHOTOBLEACHING

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Journal of Innovative Optical Health Sciences 2012年第3期5卷 21-27页

作者： XIAO-PING WANG huai-NA yu TONG-SHENG CHEN Department of Anesthesiology The First A±liated Hospital of Jinan University Guangzhou 510632 P.R.China MOE Key Laboratory of Laser Life Science and Institute of Laser Life Science College of Biophotonics South China Normal University Guangzhou 510631 P.R.China

Fluorescence resonance energy transfer(FRET)technology had been widely used to study proteinprotein interactions in living *** this study,we developed a ROI-PbFRET method to real-time quantitate the FRET efficiency of FRET construct in living cells by combining the region of interest(ROI)function of confocal microscope and partial acceptor *** validated the ROI-PbFRET method using GFPs-based FRET constructs including 18AA and SCAT3,and used it to quantitatively monitor the dynamics of caspase-3 activation in single live cells stably expressing SCAT3 during staurosporine(STS)-induced *** results for thefirst demonstrate that ROI-PbFRET method is a powerful potential tool for detecting the dynamics of molecular interactions in live cells.

关键词： Fluorescence resonance energy transfer(FRET) partial acceptor photobleaching caspase-3 living cells

Novel approach for identifying Z-axis drift of RLG based on GA-SVR model

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Journal of Systems Engineering and Electronics 2014年第1期25卷 115-121页

作者： Guo Wei Xudong yu Xingwu long College of Optoelectric Science and Engineering National University of Defense Technology

This paper describes a novel approach for identifying the Z-axis drift of the ring laser gyroscope （RLG） based on ge-netic algorithm （GA） and support vector regression （SVR） in the single-axis rotation inertial navigation system （SRINS）. GA is used for selecting the optimal parameters of SVR. The latitude error and the temperature variation during the identification stage are adopted as inputs of GA-SVR. The navigation results show that the proposed GA-SVR model can reach an identification accuracy of 0.000 2 （？）/h for the Z-axis drift of RLG. Compared with the ra-dial basis function-neural network （RBF-NN） model, the GA-SVR model is more effective in identification of the Z-axis drift of RLG.

关键词： ring laser gyroscope (RLG) support vector regression (SVR) inertial navigation system (INS) genetic algo-rithm (GA)