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| 1 | Unsteady Flow Variability Driven by Rotor-stator Interaction at Rotor Exit显示文摘Numerical investigation of the unsteady flow variability driven by rotorstator interaction in a transonic axial compressor is performed. Two models with close and far axial gap between rotor and stator rows are studied in the simulation. Particular attention is attached to the analysis of mechanisms involved in driving rotor wake oscillation, rotor wake skewing and flow angle fluctuation at rotor exit. The results show that smaller axial gap is favorable to enhance the interaction in the region between two adjacent rows, and the fluctuation of the static pressure difference between two sides of rotor wake is improved by potential field from down stator, which is the driving force for rotor wake oscillation. The interaction between rotor and stator is weakened by increasing axial distance, rotor wake shifts to suction side of rotor blade with 5%-10% of rotor pitch, the absolute value of flow angle at rotor exit is less than that in the case of close interspace for every time step, and the fluctuation amplitude is also decreased. | ZHAO Ben YANG Ce CHEN Shan QI Mingxu ZHOU Mi | 2012 | Chinese Journal of Aeronautics2012，25，6： | 5 |
| 2 | Investigation on Centrifugal Impeller in an Axial-radial Combined Compressor with Inlet Distortion显示文摘Assembling an axial rotor and a stator at centrifugal compressor upstream to build an axial-radial combined compressor could achieve high pressure ratio and efficiency by appropriate size augment.Then upstream potential flow and wake effect appear at centrifugal impeller inlet.In this paper,the axial-radial compressor is unsteadily simulated by three-dimensional Reynolds averaged Navier-Stokes equations with uniform and circumferential distorted total pressure inlet condition to investigate upstream effect on radial rotor.The results show that spanwise nonuniform total pressure distribution is generated and radial and circumferential combined distortion is formed at centrifugal rotor inlet.The upstream stator wake deflects to rotor rotation direction and decreases with blade span increases.Circumferential distortion causes different separated flow formations at different pitch positions.The tip leakage vortex is suppressed in centrifugal blade passages.Under distorted inlet condition,flow direction of centrifugal impeller leading edge upstream varies evidently near hub and shroud but varies slightly at mid-span.In addition,compressor stage inlet distortion produces remarkable effect on blade loading of centrifugal blade both along chordwise and pitchwise. | Du Li Ce Yang Ben Zhao Mi Zhou Mingxu Qi Jizhong Zhang | 2011 | Journal of Thermal Science2011，20，6： | 3 |
| 3 | Block copolymer electrolyte with adjustable functional units for solid polymer lithium metal battery显示文摘Solid polymer electrolytes have been considered as the promising candidates to improve the safety and stability of high-energy lithium metal batteries.However,the practical applications of solid polymer electrolytes are still limited by the low ionic conductivity,poor interfacial contact with electrodes,narrow electrochemical window and weak mechanical strength.Here,a series of novel block copolymer electrolytes with three-dimensional networks are designed by cross-linked copolymerization of the polyethylene glycol soft segments and hexamethylene diisocyanate trimer hard segments.Their ionic migration performances and interface compatibilities with Li metal anode have been optimized delicately by tailoring the ratio of these functional units.The optimized block copolymer electrolyte has shown an amorphous crystalline structure,a high ionic conductivity of ~5.7×10^(-4)S cm^(-1),high lithium ion transference number(~0.49),wide electrochemical window up to ~4.65 V(vs.Li+/Li) and favorable mechanical strength at 55℃.Furthermore,the enhanced interface compatibility can well support the normal operations of lithium metal batteries using both LiFePO4 and LiNi0.8Co0.15Al0.05O2 cathodes.This study not only paves a new way to develop solid polymer electrolyte with optimizing functional units,but also provides a polymer electrolyte design strategy for the application demand of lithium metal battery. | Zhiyuan Lin Xianwei Guo Yubo Yang Mingxue Tang Qi Wei Haijun Yu | 2021 | Journal of Energy Chemistry2021，30，1： | 1 |
| 4 | Investigation on the Forced Response of a Radial Turbine under Aerodynamic Excitations显示文摘Rotor blades in a radial turbine with nozzle guide vanes typically experience harmonic aerodynamic excitations due to the rotor stator interaction. Dynamic stresses induced by the harmonic excitations can result in high cycle fatigue(HCF) of the blades. A reliable prediction method for forced response issue is essential to avoid the HCF problem. In this work, the forced response mechanisms were investigated based on a fluid structure interaction(FSI) method. Aerodynamic excitations were obtained by three-dimensional unsteady computational fluid dynamics(CFD) simulation with phase shifted periodic boundary conditions. The first two harmonic pressures were determined as the primary components of the excitation and applied to finite element(FE) model to conduct the computational structural dynamics(CSD) simulation. The computed results from the harmonic forced response analysis show good agreement with the predictions of Singh's advanced frequency evaluation(SAFE) diagram. Moreover, the mode superposition method used in FE simulation offers an efficient way to provide quantitative assessments of mode response levels and resonant strength. | MA Chaochen HUANG Zhi QI Mingxu | 2016 | Journal of Thermal Science2016，25，2： | 1 |
| 5 | Yolk-shell nanoarchitecture for stabilizing a Ce_(2)S_(3)anode显示文摘Rare-earth sulfides are of research interest for lithium-ion batteries(LIBs)due to their abundant lithium intercalation sites and low redox voltage.However,their electrochemical performances are not satisfactory because of poor conductivity and volume change upon electrochemical cycling.Herein,nanoarchitectures ofγ-Ce_(2)S_(3)encapsulated in a hollow mesoporous carbon nanosphere(Ce_(2)S_(3)@HMCS)are fabricated using the self-template strategy combined with the in-sphere sulfuration method and tested as an LIB anode.The void space between the Ce_(2)S_(3)core and the outer layer of the carbon nanosphere has been properly designed and modulated to achieve excellent electrochemical performance in terms of electronic conductivity,reversibility,and rate capability.The reversible capacity of Ce_(2)S_(3)@HMCS is 2.6 times that of the pure Ce_(2)S_(3)anode,which can gradually increase and maintain a capacity of 282 mAh·g^(−1)at a current density of 1 A·g^(-1),and a high Coulombic efficiency(~100%)can be achieved even after 1000 cycles.This good performance is attributed to the unique yolk-shell nanostructure with a highly crystallized and stable Ce3S2 core and volume expansion buffer space upon lithiation/delithiation.Ex situ X-ray diffraction and nuclear magnetic resonance results indicate that the lithiation of Ce_(2)S_(3)@HMCS is an intercalation process.This study represents an important advancement in precise structural design with in-sphere sulfuration and sheds light on a potential direction for highperformance lithium storage. | Kanglong Hui Jipeng Fu Jie Liu Yongjin Chen Xiang Gao Tian Gao Qi Wei Chengyu Li Hongjie Zhang Mingxue Tang | 2021 | Carbon Energy2021，3，5： | 0 |
| 6 | Single-event upset prediction in static random access memory cell account for parameter variations显示文摘Dear editor,As technology downscales, the impact of process variations (PVs) becomes a harmful problem,which significantly affects the integrated circuit(IC) performance (1)The transistor parameters can be significantly affected by the lithography,random dopant fluctuations (RDFs), surface-state charge, gate depletion, and line edge roughness[1, 2]. | Mingxue HUO Guoliang MA Bin ZHOU Liyi XIAO Chunhua QI Yanqing ZHANG Jianning MA Yinghun PIAO Tianqi WANG | 2019 | Science China(Information Sciences)2019，62，6： | 0 |
| 7 | An Optimized Resource Scheduling Strategy for Hadoop Speculative Execution Based on Non-cooperative Game Schemes显示文摘Hadoop is a well-known parallel computing system for distributed computing and large-scale data processes.“Straggling”tasks,however,have a serious impact on task allocation and scheduling in a Hadoop system.Speculative Execution(SE)is an efficient method of processing“Straggling”Tasks by monitoring real-time running status of tasks and then selectively backing up“Stragglers”in another node to increase the chance to complete the entire mission early.Present speculative execution strategies meet challenges on misjudgement of“Straggling”tasks and improper selection of backup nodes,which leads to inefficient implementation of speculative executive processes.This paper has proposed an Optimized Resource Scheduling strategy for Speculative Execution(ORSE)by introducing non-cooperative game schemes.The ORSE transforms the resource scheduling of backup tasks into a multi-party non-cooperative game problem,where the tasks are regarded as game participants,whilst total task execution time of the entire cluster as the utility function.In that case,the most benefit strategy can be implemented in each computing node when the game reaches a Nash equilibrium point,i.e.,the final resource scheduling scheme to be obtained.The strategy has been implemented in Hadoop-2.x.Experimental results depict that the ORSE can maintain the efficiency of speculative executive processes and improve fault-tolerant and computation performance under the circumstances of Normal Load,Busy Load and Busy Load with Skewed Data. | Yinghang Jiang Qi Liu Williams Dannah Dandan Jin Xiaodong Liu Mingxu Sun | 2020 | Computers, Materials & Continua2020，，2： | 0 |
| 8 | A Survey of Lower Limb Rehabilitation Systems and Algorithms Based on Functional Electrical Stimulation显示文摘Functional electrical stimulation is a method of repairing a dysfunctional limb in a stroke patient by using low-intensity electrical stimulation.Currently,it is widely used in smart medical treatment for limb rehabilitation in stroke patients.In this paper,the development of FES systems is sorted out and analyzed in a time order.Then,the progress of functional electrical stimulation in the field of rehabilitation is reviewed in details in two aspects,i.e.,system development and algorithm progress.In the system aspect,the development of the first FES control and stimulation system,the core of the lower limb-based neuroprosthesis system and the system based on brain-computer interface are introduced.The algorithm optimization for control strategy is introduced in the algorithm.Asynchronous stimulation to prolong the function time of the lower limbs and a method to improve the robustness of knee joint modeling using neural networks.Representative applications in each of these aspects have been investigated and analyzed. | Mingxu Sun Xueyan Wu Qi Liu | 2020 | Computers, Materials & Continua2020，，1： | 0 |
| 9 | Multiple transition metals modulated hierarchical networks for high performance of metal-ion batteries显示文摘Searching anodes with excellent electrochemical performance has been in great demand for rechargeable metal ion batteries. In this contribution, Fe/Co co-doped Ni S with N-based carbon(Fe Co-NiS@NC) derived from trimetallic Prussian blue analogue is designed and synthesized. The composition can be easily adjusted and modulated by multi-metals. In addition, the well-designed carbon nanocubes effectively promote electronic conductivity and buffer the volume change upon charge and discharge cycling, resulting in good capacity and long-term cycle life for both lithium-ion batteries and sodium-ion batteries, with capacities of 1018 m Ah g^(-1)(vs. Li/Li^(+)) and 454 m Ah g^(-1)(vs. Na/Na^(+)), respectively, after 100 cycles.Kinetics studies indicate that the electrochemical behaviors are manipulated by both diffusion and pseudocapacitance processes. These strategies would open new opportunities and potention for novel energy storage. | Jie Liu Chenjie Lou Jipeng Fu Xuan Sun Jingrong Hou Jiwei Ma Yongjin Chen Xiang Gao Ligang Xu Qi Wei Mingxue Tang | 2022 | Journal of Energy Chemistry2022，31，7： | 0 |
| 10 | A Survey of Error Analysis and Calibration Methods for MEMS Triaxial Accelerometers显示文摘MEMS accelerometers are widely used in various fields due to their small size and low cost,and have good application prospects.However,the low accuracy limits its range of applications.To ensure data accuracy and safety we need to calibrate MEMS accelerometers.Many authors have improved accelerometer accuracy by calculating calibration parameters,and a large number of published calibration methods have been confusing.In this context,this paper introduces these techniques and methods,analyzes and summarizes the main error models and calibration procedures,and provides useful suggestions.Finally,the content of the accelerometer calibration method needs to be overcome. | Bo Xiao Yinghang Jiang Qi Liu Xiaodong Liu Mingxu Sun | 2020 | Computers, Materials & Continua2020，，7： | 0 |
| 11 | A Discussion on setting up the socialized Medical Equipment Maintenance Organization显示文摘This paper analyzes the main current characteristics of three operational modes ofmedical equipment maintenance (depending on the hospital inal,maintenance capability themanufacturers who produce and sell the plants, and the part-time organizations), and points outtheir commnon problems which are that all the three modes are not comprehensive, specialized,and socialized maintenance service organizations that are suitable to hospitals. | Duan.Liwei Yu.Zhonghai Sahn.Guoxin(Epuipment.Section.Zhujiang.HospitalFirst..Military.Surgeon.University,GuangZhou,510282, P.R.China Qi Liangxin Wang Mingxue Xu Peng(Education Guarantee DepartmentFirst Military Surgeon UniversityGuangzhou, 510015, P.R.C | 1999 | International Journal of Plant Engineering and Management1999，4，1： | 0 |
| 12 | Design of a high-performance 12T SRAM cell for single event upset tolerance显示文摘Dear editor,As an important part of a cache, static random-access memory(SRAM) has been extensively utilized to satisfy the application requirements in modern embedded processors.It plays an important role in data interaction between the central processing unit and internal memory. Moreover,these data interactions are safety critical requiring highly reliable SRAM. However, owing to complementary metaloxide-semiconductor(CMOS) manufacturing processes entering the nanoscale era, SRAM is increasingly vulnerable to a single event upset(SEU). | Chunhua QI Yanqing ZHANG Guoliang MA Chaoming LIU Tianqi WANG Liyi XIAO Mingxue HUO Guofu ZHAI | 2021 | Science China(Information Sciences)2021，64，11： | 0 |
| 13 | Dual-enhancement of chromaticity and thermal stability:In-situ synthesis of core-shell γ-Ce_(2)S_(3) @CePO_(4) configuration显示文摘Non-toxic rare earth(RE) composite materials are promising and active in optoelectronic fields,such as pigment.In this work,Na ions doped γ-Ce_(2) S_(3) pigments were synthesized by solid-phase vulcanization and followed by in-situ synthesis to prepare an outer layer of CePO_(4) film.The characterizations of X-ray diffraction(XRD),scanning electron microscopy(SEM),transmission electron microscopy(TEM),X-ray photoelectron spectroscopy(XPS),solid state nuclear magnetic resonance(NMR) indicate that Na-dopedγ-Ce_(2) S_(3) and CePO_(4) uniformly and tightly coated core-shell structure was successfully synthesized.The thermogravimetric analysis(TG) and reflection spectrum(RS) reveal that the CePO_(4) coating significantly improves the colorant and thermal stability performance of γ-Ce_(2) S_(3) .The excellent color quality of γ-Ce_(2) S_(3) @CePO_(4)(L*=45.16,a*=55.94.b*=44.53) is achieved and the red color(L*=43.82,a*=49.79,b*=38.04) is still retained even if the sample is heated in air at 400℃ for 30 min. | Kanglong Hui Wei Dong Jipeng Fu Mingxue Tang Qi Wei Chengyu Li Hongjie Zhang | 2022 | Journal of Rare Earths2022，40，5： | 0 |
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