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Vehicle height and leveling control of electronically controlled air suspension using mixed logical dynamical approach

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Science China(Technological Sciences) 2016年第12期59卷 1814-1824页

作者： SUN Xiao Qiang CAI Ying Feng YUAN Chao Chun wang Shao hua CHEN Long Automotive Engineering Research Institute Jiangsu University Zhenjiang 212013 China School of Automotive and Traffic Engineering Jiangsu University Zhenjiang 212013 China

Vehicle height and leveling control of electronically controlled air suspension(ECAS) still poses theoretical challenges for researchers that have not been adequately addressed in prior research. This paper investigates the design and verification of a new controller to adjust the vehicle height and to regulate the roll and pitch angles of the vehicle body(leveling control) during the height adjustment procedures. A nonlinear mechanism model of the vehicle height adjustment system is formulated to describe the dynamic behaviors of the system. By using mixed logical dynamical(MLD) approach, a novel control strategy is proposed to adjust the vehicle height by controlling the on-off statuses of the solenoid valves directly. On this basis, a correction algorithm is also designed to regulate the durations of the on-off statuses of the solenoid valves based on pulse width modulated(PWM) technology, thus the effective leveling control of the vehicle body can be guaranteed. Finally, simulations and vehicle tests results are presented to demonstrate the effectiveness and applicability of the proposed control methodology.

关键词： electronically controlled air suspension vehicle height control leveling control hybrid system mixed logical dynamical approach

RESEARCH PROGRESS IN NONLINEAR ANALYSIS OF HEART ELECTRIC ACTIVITIES

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Chinese Science Bulletin 2006年第4期51卷 385-393页

作者： NING Xinbao BIAN Chunhua wang jun CHEN Ying State Key Laboratory of Modem Acoustics Institute for BiomedicalElectronic Engineering Department of Electronic Science & Engineering Nanjing University Nanjing 210093 China

Nonlinear science research is a hot point in the world. It has deepened our cognition of determinism and randomicity, simplicity and com-plexity, noise and order and it will profoundly influ-ence the progress of the study of natural science, including life science. Life is the most complex nonlinear system and heart is the core of lifecycle system. In the late more than 20 years, nonlinear research on heart electric activities has made much headway. The commonly used parameters are based on chaos and fractal theory, such as correlation dimension, Lyapunov ex-ponent, Kolmogorov entropy and multifractal singu-larity spectrum. This paper summarizes the commonly used methods in the nonlinear study of heart electric signal. Then, considering the shortages of the above tradi-tional nonlinear parameters, we mainly introduce the results on short-term heart rate variability (HRV) signal (500 R-R intervals) and HFECG signal (1-2s). Finally, we point out it is worthwhile to put emphasis on the study of the sensitive nonlinearity parameters of short-term heart electric signal and their dynamic character and clinical effectivity.

关键词：心电图心率非线性分析混沌信号研究进展

Development of New Generation Cooling Control System After Rolling in Hot Rolled Strip Based on UFC

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Journal of Iron and Steel Research International 2013年第7期20卷 29-34页

作者： LI Hai-jun LI Zhen-lei YUAN Guo wang Zhao-dong wang Guo-dong State Key Laboratory of Rolling and Automation Northeastern University

Ultra-fast cooling （UFC） is an advanced technology in hot rolling field. Through this technology, great changes on the run-out table are produced in the strip cooling process. In order to adapt to these changes, a new gen-eration of hot strip cooling control system after rolling was developed based on the UFC basic principle. The system can not only accomplish temperature of UFC delivery side, coiling temperature, cooling rate, etc, and multi-objective accuracy control, but also offer more flexibility and new attractive possibilities in terms of cooling pattern on the run-out table, which could be of prime importance for the production of some difficult steels. In addition, through the time-velocity-distance （TVD） profile prediction combined with speed feed-forward control and coiling temperature feedback control, the coiling temperature control precision can be effectively improved during accelerative rolling in the system. At present, the system has been successfully used in the conventional strip production line and CSP short process production line, and its application effect is perfect.

关键词： ultra-fast cooling hot rolled strip laminar cooling new generation cooling control system run-out rollertable strip cooling

MicroRNAs in septic acute kidney injury

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Burns & Trauma 2023年第1期11卷 300-313页

作者： Bo wang jun Xu Ping Fu Liang Ma Kidney Research Institute Department of NephrologyWest China Hospital of Sichuan UniversitySichuanChengdu 610041China Department of Nephrology Affiliated Hospital of Guizhou Medical UniversityGuiyang550004China

Sepsis is a potentially fatal complication of burns and trauma that can cause acute kidney injury(AKI)with substantial morbidity and mortality,but this disease is poorly *** medical advances,effective therapeutic regimens for septic AKI remain ***(miRNAs)are endogenous non-coding RNAs that influence the translation of target messenger RNAs in a variety of biological *** evidence has shown that miRNAs are intimately associated with septic *** goal of this review was to summarize recent advances in the profound understanding of the functional role of miRNAs in septic AKI,as well as to provide new insights into miRNAs as feasible biomarkers and therapeutic targets for septic AKI.

关键词： MicroRNAs Sepsis Acute kidney injury Biomarkers Therapeutic targets

The Effect of In situ Melt Pre-shear Induced Oriented Precursors on the Crystallization of Poly(1-butene)/Polypropylene Blends

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Chinese Journal of Polymer Science 2024年第12期42卷 2011-2020,I0012页

作者： Wen-Kang Wei Jing-Jing Zhao Chen-Guang Liu Dong wang Ai-hua He Shandong Provincial Key Laboratory of Olefin Catalysis and Polymerization Key Laboratory of Rubber-Plastics(Ministry of Education)School of Polymer Science and EngineeringQingdao University of Science and TechnologyQingdao266042China State Key Laboratory of Organic-Inorganic Composites Beijing University of Chemical TechnologyBeijing100029China

Melt pre-shear induced crystallization of polymer blends holds great significance in industrial processing and product *** this work,two typical PB/PP blends(50/50,90/10),possessing commercial value and academic hotspot,were employed to investigate the effect of melt pre-shear on the crystallization of isotactic poly(1-butene)(PB)and polypropylene(PP)by applying shearing slightly above the melting temperature of PP with subsequent non-isothermal crystallization to simulate actual processing *** was discovered that in PB/PP(90/10)blend,in situ melt pre-shear generated oriented PP precursors induced the formation of PP-FIC(Flow-induced crystallization)which acted as row crystal nucleus significantly promoting PB crystallization into spherulite with higher melting temperatures(T_(m)),crystallinity(X_(c)),and thicker lamellar thickness(d_(c)).While in PB/PP(50/50)blend,the melt pre-shear generated PP-shish precursors induced the formation of PP shish-kebab that exerted a confining effect on the crystal growth of PB,resulting in truncated spherulite formation with higher T_(m) and thicker d_(c) but lower X_(c).This research provides insight into the mechanism underlying oriented crystal structure formation,crystal properties,and phase morphology of PB/PP blends under melt pre-shear fields,which have significant theoretical and practical implications for their industrial processing and preparation of high-performance products.

关键词： Meltpre-shear PB/PPblends Precursors Crystallization

Application of metal-based biomaterials in wound repair

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Engineered Regeneration 2021年第1期2卷 137-153页

作者： Heni wang Zejun Xu Qing Li jun Wu School of Biomedical Engineering Sun Yat-sen UniversityShenzhen 518107PR China School and Hospital of Stomatology Cheeloo College of MedicineShandong UniversityJinnanShandongChina

Wound repair,as one of the most intricate biological mechanisms,is essential to ensure the formation and integrity of the skin ***,multiple factors can cause delays and severe debilitating effects in wound repair,which bring serious *** elements such as calcium,copper,iron,and zinc serve irreplaceable roles in various regulatory pathways of the human body and directly or indirectly affect the orderly wound repair *** have proven to be an attractive strategy that can be applied to wound repair and have excellent potential to induce skin *** recent decades,with in-depth research on the regulatory mechanisms of metal elements involved in wound repair,metal-based biomaterials have been widely ***-based zero-dimensional(0D)biomaterials such as Angstrom-scale metallic materials and metal quantum dots,metal-based one-dimensional(1D)biomaterials such as nanorods,nanowires and nanofibers,metal-based two-dimensional(2D)biomaterials such as nanofilms and nanosheets,and metal-based three-dimensional(3D)biomaterials such as nanoframes have achieved remarkable results,which provide great support for accelerated wound *** this review,we systematically investigated the advances and impacts of various metal-based biomaterial platforms for wound repair to provide valuable guidance for future breakthroughs in wound treatment.

关键词： Wound repair Metal Biomaterials

Cloning and mRNA expression of macrophage migration inhibitory factor (MIF) gene of large yellow croaker (P seudosciaena crocea)

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Acta Oceanologica Sinica 2010年第3期29卷 63-73页

作者： MAO Yong XU Bing SU Yongquan ZHANG Zhiwen DING Shaoxiong wang Ding wang jun Fisheries College of Guangdong Ocean University Zhanjiang 524025 China State Key Laboratory of Marine Environmental Science Xiamen University Xiamen 361005 China

Mammalian macrophage migration inhibitory factor （MIF） plays an important role as an indispensable mediator in the pathogenesis of inflammatory disease like septicemia, but little is known about the role of MIF homologue in fish septicemia. The authors have cloned the MIF homologue in large yellow croaker Pseudosciaena crocea （LycMIF） using RACE approach. The full-length cDNA of LycMIF was 634 bases and contained an ORF of 345 bases encoding a protein of 115 amino acid residues. As demonstrated by RT-PCR and QRT-PCR assay, MIF mRNAs were constitutively expressed in 11 selected tissues and were abundant in brain and liver. Moreover, the LycMIF transcripts in the liver and head kidney were responsive to bacteria infection and could be significantly up-regulated. Our results provide the first direct evidence that fish MIF was implicated in pathogenesis of fish vibrosis and play an important role in response to bacteria infection.

关键词： macrophage migration inhibitory factor (MIF) vibriosis large yellow croaker mRNA expression

Event plane determination from the zero degree calorimeter at the cooling storage ring external-target experiment

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Nuclear Science and Techniques 2023年第7期34卷 113-121页

作者： Li-Ke Liu hua Pei Ya-Ping wang Biao Zhang Nu Xu Shu-Su Shi Key Laboratory of Quark and Lepton Physics(MOE)and Institute of Particle Physics Central China Normal UniversityWuhan 430079China

The Cooling Storage Ring external-target experiment(CEE)spectrometer is used to study the nuclear matter created in heavy-ion collisions at√sNN=2.1-2.4 GeV with the aim to reveal the quantum chromodynamics phase structure in the high-baryon-density *** flow is considered an effective probe for evaluating the properties of media during high-energy nuclear *** of the main functions of the zero-degree calorimeter(ZDC),a subdetector system in the CEE,is to determine the reaction plane in heavy-ion *** step is crucial for measuring the collective flow and other reaction-plane-related *** this paper,we illustrate the procedures for event plane determination using the ***,isospin-dependent quantum molecular dynamics model-based predictions of the rapidity dependence of the directed and elliptical flows for p,d,t,3He,and 4He,produced in 2.1 GeV U+U collisions,are presented.

关键词： QCD phase structure Heavy-ion collisions Collective flow Reaction plane Zero-degree calorimeter

Effect of Cyclic Annealing on Microstructure and Mechanical Properties of Medium Carbon Steel

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Journal of Iron and Steel Research International 2016年第2期23卷 145-150页

作者： Zhi-qing LÜ Hui-fang ZHANG Qing MENG Zhen-hua wang Wan-tang FU College of Mechanical Engineering Yanshan UniversityQinhuangdao 066004HebeiChina State Key Laboratory of Metastable Material Science and Technology Yanshan UniversityQinhuangdao 066004HebeiChina

The microstructure and mechanical properties of medium carbon steel after cyclic heat treatment were in- vestigated. The effects of cyclic numbers and long time annealing on the microstructure and mechanical properties of the experimental steel were compared. A short duration （5 min） holding at 1023 K （above A1 temperature） and a short-duration （3 min） holding at 893 K are adopted in each cyclic heat treatment. The spheroidization is accelerated during cyclic heat treatment, and the spheroidizing ratio grows with cyclic numbers. After 12-cycle heat treatments, there are few incompletely spheroidized regions in the specimens, and cementite lamellae mostly change into cement- ite particles. The morphological character of cementite for 12 cycles is similar to that undergoing annealing for 10 h at 973 K. The strength of the experimental steel after 5-cycle heat treatment is the lowest in the following cyclic heat treatment, but it is still higher than that of specimens with subcritical annealing over a long period （10 h）. After 12- cycle heat treatment, the strength of the experimental steel is close to that of the normalized steel, and the plasticity is the best in all heat treated specimens.

关键词： rapid spheroidizing mechanical property cyclic annealing cementite medium carbon steel