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| 1 | The influence of Sc addition on microstructure and tensile mechanical properties of Mg-4.5Sn-5Zn alloys显示文摘The microstructure and tensile properties of the as-cast and as-rolled Mg-4.5Sn-5Zn alloys by adding various Sc content were investigated.Improvement of the tensile properties in as-cast Sc-containing alloys is attributed to the grain refinement and modification of secondary phase morphology.Three types of precipitates,namely spherical Mg2Sn,rod-like MgZn and Sc-rich phases were dispersed in the matrix of the Sc added M g-4.5Sn-5Zn alloys after hot rolling deformation.In addition,weakening and deflecting of the basal texture in as-rolled alloys were found and were attributed to Sc addition.Further increasing the Sc addition rate to 0.4 wt.%,however,resulted in the clustering of the Sc-rich phases and was found to reduce the tensile properties of the alloy,especially the elongation.The as-rolled Mg-4.5Sn-5Zn-0.3Sc alloy exhibits an optimum combination of tensile properties.The ultimate tensile strength,yield strength and elongation are 293.0MPa,164.2Mpa and 21.5%,respectively,and the elongation is about 68%higher than that of Sc-free alloy. | Pengqi Wang Enyu Guo Xuejian Wang Huijun Kang Zongning Chen Zhiqiang Cao Tongmin Wang | 2019 | Journal of Magnesium and Alloys2019，7，3： | 6 |
| 2 | A novel surface molecularly imprinted polymer as the solid-phase extraction adsorbent for the selective determination of ampicillin sodium in milk and blood samples显示文摘Surface molecularly imprinted polymers(SMIPs) for selective adsorption of ampicillin sodium were synthesized using surface molecular imprinting technique with silica gel as a support.The physical and morphological characteristics of the polymers were investigated by scanning electron microscope(SEM),Fourier transform infrared spectroscopy(FT-IR),thermogravimetric analysis(TGA),elemental analysis and nitrogen adsorption–desorption test.The obtained results showed that the SMIPs displayed great adsorption capacity(13.5 μg/mg),high recognition ability(the imprinted factor is 3.2) and good binding kinetics for ampicillin sodium.Finally,as solid phase extraction adsorbents,the SMIPs coupled with HPLC method were validated and applied for the enrichment,purification and determination of ampicillin sodium in real milk and blood samples.The averages of spiked accuracy ranged from 92.1% to 107.6%.The relative standard deviations of intra- and inter-day precisions were less than 4.6%.This study provides a new and promising method for enriching,extracting and determining ampicillin sodium in complex biological samples. | Ningli Wu Zhimin Luo Yanhui Ge Pengqi Guo Kangli Du Weili Tang Wei Du Aiguo Zeng Chun Chang Qiang Fu | 2016 | Journal of Pharmaceutical Analysis2016，6，3： | 6 |
| 3 | Highly efficient K-Fe/C catalysts derived from metal-organic frameworks towards ammonia synthesis显示文摘Fe-based catalysts have been discovered as the best elementary metal-based heterogeneous catalysts for the ammonia synthesis in industrial application during the last century.Herein,a novel and scalable strategy is developed to prepare the K-promoted Fe/C catalyst with extremely high Fe loading (> 50 wt.%) through pyrolysis of the Fe-based metal-organic framework (MOF) xerogel.The obtained K-Fe/C catalysts exhibited superior activity and stability towards ammonia synthesis.The weight-specific reaction rate of Fe/C with K2O as promoter can achieve 12.4 mmol·g-1·h-1 at 350 ℃ and 30.4 mmol·g-1·h-1 at 400 ℃,approximately four and two times higher than that of the commercial fused-iron catalyst (3.4 mmol·g-1·h-1 at 350 ℃ and 16.7 mmol·g-1·h-1 at 400 ℃) under the same condition,respectively.The excellent performance of K-Fe/C can be ascribed to the inherited structure derived from the metal-organic frame precursors and the promotion of potassium,which can modify the binding energy of reactant molecules on the Fe surface,transfer electrons to iron for effective activation of nitrogen,prevent agglomeration of Fe nanoparticle (NPs) and restrain side reaction of carbon matrix to methane. | Pengqi Yan Wenhan Guo Zibin Liang Wei Meng Zhen Yin Siwei Li Mengzhu Li Mengtao Zhang Jie Yan Dequan Xiao Ruqiang Zou Ding Ma | 2019 | Nano Research2019，12，9： | 4 |
| 4 | Synthesis of Novel Chitosan Microspheres Grafted with β-Cyclodextrins and Their Adsorption for Iodine for Antibacterial Activities显示文摘The novel chitosan microspheres grafted with β-cyclodextrins (CMGC) were prepared by means of the reaction of chitosan microspheres and mono-(6-p-tosyl)- β-cyclodextrins(β-CD-OTs-6). β-CD-OTs-6 were gained by the reaction of p-toluenesulfonyl chloride (TsCl) and β-cyclodextrins (β-CDs). Their structures were proved by Fourier transform infrared spectral analysis (FT-IR), X ray powder diffraction analysis, and ~13C NMR; the configuration of CMGC was characterized by scanning electron micrograph (SEM) and transmittance electron micrograph (TEM). The inclusion complex of CMGC with iodine was prepared and its inclusion ability was studied. The experimental results showed that some iodine was included with CMGC and formed a stable inclusion. The stable complex of CMGC and iodine (CMGC-I) shows good antibacterial effect. | YIYing WANGYu-ting ZHANGXue-yong PANGZhi-yi PENGQi LIUHui | 2005 | Wuhan University Journal of Natural Sciences2005，10，3： | 3 |
| 5 | Theory-driven designed TiO_(2)@MoO_(2)heterojunction:Balanced crystallinity and nanostructure toward desirable kinetics and highrate sodium-ion storage显示文摘Sodium-ion batteries(SIBs)are promising candidates for large-scale energy storage due to their cost effectiveness and the unlimited availability of sodium.However,there remains a need for the rational design of better anodic materials than are currently available,as these materials are critical for the sodium-ion storage process.In this work,theoretical calculations were performed to design a conceptually novel TiO_(2)@MoO_(2)heterojunction(TMH)anode that was expected to exhibit better electrochemical performance than current anodes.The TMH anode was fabricated via a facile and cost-effective method,and the results of in-depth sodium-ion-storage performance and reaction kinetics analyses indicate that it exhibited an excellent rate capability and enhanced pseudocapacitive response,due to its high crystallinity.This electrochemical performance was superior to that of previously reported anodic materials,confirming the accuracy of the theoretical calculations.Destruction of TMH’s nanostructure at high temperatures resulted in a decrease in its electrochemical performance,indicating the key role played by the nanostructure in TMH’s ability to store sodium ions.This study demonstrates that integration of theoretical predictions with experimental investigations offers insights into how materials’crystallinity and nanostructure affect their pseudocapacitive sodiumion storage capabilities,which will help to guide the rational design of effective anodic materials for SIBs. | Junyi Yin Pengqi Hai Yuan Gao Zihan Gan Chao Wu Yonghong Cheng Xin Xu | 2023 | Nano Research2023，16，4： | 1 |
| 6 | Novel confinement combustion method of nanosized WC/C for efficient electrocatalytic oxygen reduction显示文摘Nanosized tungsten carbide(WC)/carbon(C)catalyst was synthesized via a novel ultra-rapid confinement combustion synthesis method.The amount of activated carbon(AC)plays an important role in the morphology and structure,controlling both the precursor and final powder.The WC particles synthesized inside the pores of the AC had been 10-20 nm because of the confinement of the pore structure and the large specific surface area of AC.When used for oxygen reduction performance,the half-wave potential was−0.24 V,and the electron transfer number was 3.45,indicating the main reaction process was the transfer of four electrons.The detailed electrocatalytic performance and underlying mechanism were investigated in this work.Our study provides a novel approach for the design of catalysts with new compositions and new structures,which are significant for promoting the commercialization of fuel cells. | Pengqi Chen Yunxiao Tai Huan Wu Yufei Gao Jiayu Chen Jigui Cheng | 2022 | International Journal of Minerals,Metallurgy and Materials2022，29，8： | 1 |
| 7 | Rapidandeffectiveadsorptionofleadionsonfinepoly(phen-ylenediamine)microparticles显示文摘 | HuangM R PengQY LiXG | 2006 | Chemistry A EuropeanJournal2006，12，： | 1 |
| 8 | Simulation research for mobile robot path planning based on improved artificial potential field method recommended by the AsiaSim显示文摘Mobile robot path planning is an important research branch in the field of mobile robots.The main disadvantage of the traditional artificial potential field(APF)method is prone to local minima problems.Improved artificial potential field(IAPF)method is presented in this paper to solve the problem in the traditional APF method for robot path planning in different conditions.We introduce the distance between the robot and the target point to the function of the original repulsive force field and change the original direction of the repulsive force to avoid the trap problem caused by the local minimum point.The IAPF method is suitable for mobile robot path planning in the complicated environment.Simulation and experiment results at the robot platform illustrated the superiority of the modified IAPF method. | Pengqi Hou Hu Pan Chen Guo | 2017 | International Journal of Modeling, Simulation, and Scientific Computing2017，8，2： | 0 |
| 9 | Acrylamide induces HepG2 cell proliferation through upregulation of miR-21 expression显示文摘Acrylamide, a potential carcinogen, exists in carbohydrate-rich foods cooked at a high temperature. It has been reported that acrylamide can cause DNA damage and cytotoxicity. The present study aimed to investigate the potential mechanism of human hepatocarcinoma HepG2 cell proliferation induced by acrylamide and to explore the antagonistic effects of a natural polyphenol curcumin against acrylamide via miR-21. The results indicated that acrylamide(≤100μmol/L) significantly increased HepG2 cell proliferation and miR-21 expression. In addition, acrylamide reduced the PTEN expression in protein level, while induced the expressions of p-AKT, EGFR and cyclin D1. The PI3 K/AKT inhibitor decreased p-AKT protein expression and inhibited the proliferation of HepG2 cells. In addition, curcumin effectively reduced acrylamide-induced HepG2 cell proliferation and induced apoptosis through the expression of miR-21. In conclusion, the results showed that acrylamide increased HepG2 cell proliferation via upregulating miR-21 expression, which may be a new target for the treatment and prevention of cancer. | Yuyu Xu Pengqi Wang Chaoqi Xu Xiaoyun Shan Qing Feng | 2019 | The Journal of Biomedical Research2019，33，3： | 0 |
| 10 | Design of concise robust control for longitudinal motionof YuKun显示文摘With the rapid development of the shipping industry,the safety and comfort of ship transportation have been paid more and more attention,and the pitch and heave motion of ships are the most serious factors.In this paper,the longitudinal motion mathematical model of YuKun is esta b lished.By assigning the zero-pole to the left half-plane and using the properties of the symmetric matrix,the shaping weighting functions matrix is designed to stabilize the multi-input multi-output(MIMO)system of YuKun.Finally,a new concise robust controller is designed using the steady output of the shaped system.The simulation results show that under the control of the concise robust controller,the pitch angle and heave of YuKun decrease by 79.9% and 86.2%,respectively.Theoretical analysis and simulation results show that the concise robust controller has a good control effect on the longitudinal motion of YuKun,and is simple and easy to use,with clear engineering significance. | Chenfei Liu Peikun Xiao Xianku Zhang Pengqi Wang Jiafu Wang Dinghuo Hu | 2023 | Transportation Safety and Environment2023，5，3： | 0 |
| 11 | Methods for fatigue-life estimation:A review of the current status and future trends显示文摘With the development of modern industry and ever more complex structural loads,the possibility of fatigue failure is increasing.Fatigue analysis can be used to evaluate the service life of components and reduce the probability of accidents.Therefore,the development and application of fatigue-analysis technology have important research significance.This paper collects information from a wide field of literature and summarizes the current status of fatigue-analysis research.It covers related theoretical knowledge,fatigue-life prediction methods,and fatigue design methods and their application scenarios,and it summarizes the challenges and research hotspots in the field.On the basis of this examination,future development directions of fatigue-life prediction methods are proposed.The conclusions will have a certain guiding role in the development of fatigue-analysis methods. | Lufan Zhang Boshi Jiang Pengqi Zhang Heng Yan Xiangbo Xu Ruizhuo Liu Jingjing Tang Caixia Ren | 2023 | Nanotechnology and Precision Engineering2023，6，2： | 0 |
| 12 | China's agriculture green development: from concept to actions显示文摘China has initiated a green transformation plan in 2015, which was soon applied to agriculture, known as the agriculture green development(AGD)initiative, with the goals of achieving food security, high resource use efficiency, and an ecofriendly environment. To assess the agricultural transformation from 1997 to 2020, this paper proposes a national-scale indicator system consisting three dimensions(socioeconomic, food production and eco-environmental) and ten sub-dimensions to quantify the AGD score.This study showed that AGD score in China was at a moderate level during 1997–2010, scoring 40 out of 100. During this stage, decreased scores in the sub-dimensions of resource consumption, environmental quality, and environmental cost have offset the improvement in the socioeconomic dimension, resulting in fluctuated scores around 40. In the second stage(2011–2020), China's AGD score improved but still at moderate level, scoring an average of 46.3, with each dimension increasing by 5.3%–25.0%. These results indicate that China has made progress in the agricultural transformation, transitioning from conceptualization to actions through the implementation of various policies and projects. However, the study emphasizes the need for more effort to address the insufficient and unbalanced development, along with the growing eco-environmental challenges, especially the trade-offs among dimensions. | Haixing ZHANG Yuan FENG Yanxiang JIA Pengqi LIU Yong HOU Jianbo SHEN Qichao ZHU Fusuo ZHANG | 2024 | Frontiers of Agricultural Science and Engineering2024，11，1： | 0 |
| 13 | Research trends in methods for controlling macro-micro motion platforms显示文摘With ongoing economic,scientific,and technological developments,the electronic devices used in daily lives are developing toward precision and miniaturization,and so the demand for high-precision manufacturing machinery is expanding.The most important piece of equipment in modern high-precision manufacturing is the macro-micro motion platform(M3P),which offers high speed,precision,and efficiency and has macro-micro motion coupling characteristics due to its mechanical design and composition of its driving components.Therefore,the design of the control system is crucial for the overall precision of the platform;conventional proportional–integral–derivative control cannot meet the system requirements,and so M3Ps are the subject of a growing range of modern control strategies.This paper begins by describing the development history of M3Ps,followed by their platform structure and motion control system components,and then in-depth assessments of the macro,micro,and macro-micro control systems.In addition to examining the advantages and disadvantages of current macro-micro motion control,recent technological breakthroughs are noted.Finally,based on existing problems,future directions for M3P control systems are given,and the present conclusions offer guidelines for future work on M3Ps. | Lufan Zhang Pengqi Zhang Boshi Jiang Heng Yan | 2023 | Nanotechnology and Precision Engineering2023，6，3： | 0 |
| 14 | Banana-shaped electron acceptors with an electron-rich core fragment and 3D packing capability显示文摘The emergence of Y6-type nonfullerene acceptors has greatly enhanced the power conversion efficiency(PCE)of organic solar cells(OSCs).However,which structural feature is responsible for the excellent photovoltaic performance is still under debate.In this study,two Y6-like acceptors BDOTP-1 and BDOTP-2 were designed.Different from previous Y6-type acceptors featuring an A–D–Aʹ–D–A structure,BDOTP-1,and BDOTP-2 have no electron-deficient Aʹfragment in the core unit.Instead,there is an electron-rich dibenzodioxine fragment in the core.Although this modification leads to a marked change in the molecular dipole moment,electrostatic potential,frontier orbitals,and energy levels,BDOTP acceptors retain similar three-dimensional packing capability as Y6-type acceptors due to the similar banana-shaped molecular configuration.BDOTP acceptors show good performance in OSCs.High PCEs of up to 18.51%(certified 17.9%)are achieved.This study suggests that the banana-shaped configuration instead of the A–D–Aʹ–D–A structure is likely to be the determining factor in realizing high photovoltaic performance. | Pengqi Li Xianyi Meng Ke Jin Zhiwei Xu Jianqi Zhang Lixiu Zhang Chuang Niu Furui Tan Chenyi Yi Zuo Xiao Yaqing Feng Guan-Wu Wang Liming Ding | 2023 | Carbon Energy2023，5，1： | 0 |
| 15 | Perception Enhanced Deep Deterministic Policy Gradient for Autonomous Driving in Complex Scenarios显示文摘Autonomous driving has witnessed rapid advancement;however,ensuring safe and efficient driving in intricate scenarios remains a critical challenge.In particular,traffic roundabouts bring a set of challenges to autonomous driving due to the unpredictable entry and exit of vehicles,susceptibility to traffic flow bottlenecks,and imperfect data in perceiving environmental information,rendering them a vital issue in the practical application of autonomous driving.To address the traffic challenges,this work focused on complex roundabouts with multi-lane and proposed a Perception EnhancedDeepDeterministic Policy Gradient(PE-DDPG)for AutonomousDriving in the Roundabouts.Specifically,themodel incorporates an enhanced variational autoencoder featuring an integrated spatial attention mechanism alongside the Deep Deterministic Policy Gradient framework,enhancing the vehicle’s capability to comprehend complex roundabout environments and make decisions.Furthermore,the PE-DDPG model combines a dynamic path optimization strategy for roundabout scenarios,effectively mitigating traffic bottlenecks and augmenting throughput efficiency.Extensive experiments were conducted with the collaborative simulation platform of CARLA and SUMO,and the experimental results show that the proposed PE-DDPG outperforms the baseline methods in terms of the convergence capacity of the training process,the smoothness of driving and the traffic efficiency with diverse traffic flow patterns and penetration rates of autonomous vehicles(AVs).Generally,the proposed PE-DDPGmodel could be employed for autonomous driving in complex scenarios with imperfect data. | Lyuchao Liao Hankun Xiao Pengqi Xing Zhenhua Gan Youpeng He Jiajun Wang | 2024 | Computer Modeling in Engineering & Sciences2024，140，7： | 0 |
| 16 | Mechanisms of Myocardial Stunning in Stress-Induced Cardiomyopathy显示文摘Stress-induced cardiomyopathy,in contrast to acute myocardial infarction,is a type of acute heart failure characterized by reversible left ventricular dysfunction.Cardiac imaging primarily reveals left ventricle myocardial stunning,81.7%of which is apical type.Emotional or psychological stress usually precedes the onset of stress-induced cardiomyopathy,which is increasingly being recognized as a unique neurogenic myocardial stunning disease.To distinguish between acute myocardial infarction and acute viral or auto-immune myocarditis,this review summarizes specific mechanisms of myocardial stunning in stress-induced cardiomyopathy,such as calcium disorders,metabolic alterations,anatomical and histological variations in different parts of the left ventricle,and microvascular dysfunction. | Quanwei Pei Nadine Mbabazi Lina Zou Junpei Zhang Hongpeng Yin Bin Li Jiaxin Wang Weifa Wang Pengqi Lin Junjie Yang Dechun Yin | 2022 | Cardiovascular Innovations and Applications2022，7，3： | 0 |
| 17 | The Role of Sleep Deprivation in Arrhythmias显示文摘Sleep is essential to the normal psychological and physiological activities of the human body.Increasing evidence indicates that sleep deprivation is associated with the occurrence,development,and poor treatment effects of various arrhythmias.Sleep deprivation affects not only the peripheral nervous system but also the central nervous system,which regulates the occurrence of arrhythmias.In addition,sleep deprivation is associated with apoptotic pathways,mitochondrial energy metabolism disorders,and immune system dysfunction.Although studies increasingly suggest that pathological sleep patterns are associated with various atrial and ventricular arrhythmias,further research is needed to identify specific mechanisms and recommend therapeutic interventions.This review summarizes the findings of sleep deprivation in animal experiments and clinical studies,current challenges,and future research directions in the field of arrhythmias. | Wenlong Wang Hongpeng Yin Ge Sun Junpei Zhang Jingmei Sun Nadine Mbabazi Lina Zou Bin Li Pengqi Lin Quanwei Pei Xin Wang Penghe Wang Xuanrui Ji Xiufen Qu Dechun Yin | 2022 | Cardiovascular Innovations and Applications2022，7，3： | 0 |
| 18 | VGIS-AntiJitter: an effective framework for solving jitter problems in virtual geographic information systems显示文摘With the proposition of the Digital Earth(DE)concept,Virtual Geographic Information System(VGIS)has started to play the role of a Digital Earth prototype system.Many core problems involved in VGIS,such as out-of-core management and interactive rendering of very large scale terrain and image data,have been well studied in the past decades.However,the jitter problem,a common problem in VGIS that often causes annoying visual artefacts and deteriorates the output image quality,draws little attention.In this paper,after an intensive analysis of the jitter problem,a comprehensive framework is proposed to address such a problem while accounting for the characteristics of different data types in VGIS,such as terrain or ocean mesh data,vector data and 3-D model data.Specifically,this framework provides an improved dynamic local coordinate system(DLCS)method for terrain or ocean mesh data.For vector data,the framework provides a simple and effective multiple local coordinate systems(MLCS)method.The framework provides a MLCS method for 3-D model data making full use of the existing local coordinate system of the model.The advantages of the proposed methods over current approaches are analysed and highlighted through case studies involving large GIS datasets. | Feixiong Luo Ershun Zhong Guofeng Cao Ricardo Delgado Tellez Pengqi Gao | 2013 | International Journal of Digital Earth2013，6，1： | 0 |
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