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| 1 | 数学推广的类型与思想方法显示文摘本文研究了数学推广的概念与类型,在此基础上进一步提出数学推广的思想方法。 | Zheng longxin | 1999 | 江汉学术1999，30，3： | 21 |
| 2 | Machining deformation of single-sided component based on finishing allowance optimization显示文摘Owing to reliability and high strength-to-weight ratio,large thin-walled components are widely used in the aviation and aerospace industry.Due to the complex features and sequence involved in the machining process of large thin-walled components,machining deformation of component is easy to exceed the specification.In order to address the problem,it is important to retain the appropriate finishing allowance.To find the overall machining deformation,finishing allowance-induced deformation(web finishing allowance,sidewall finishing allowance)and initial residual stress-induced deformation were considered as major factors.Meanwhile,machined surface residual stress-induced deformation,clamping stress-induced deformation,thermal deformation,gravity-induced deformation and inertial force-induced deformation were neglected in the optimization model.Six-peak Gaussian function was introduced to fit the initial residual stress.Based upon the obtained function of initial residual stress,a deformation prediction model between initial residual stress and finishing allowance was established to attain the finishing allowanceinduced deformation.In addition,linear programming optimization model based on the simplex algorithm was developed to optimize the overall machining deformation.Results have concluded that the overall machining deformation reached the minimum value when sidewall finishing allowance and web finishing allowance varied between 1 and 2 mm.Additionally,web finishing allowance-induced deformation and sidewall finishing allowance-induced deformation were1.05 mm and 0.7 mm.Furthermore,the machining deformation decreased to 0.3–0.38 mm with the application of optimized finishing allowance allocation strategy,which made 39–56%reduction of the overall machining deformation compared to that in conventional method. | Xiaoyue LI Liang LI Yinfei YANG Guolong ZHAO Ning HE Xiaocen DING Yaowen SHI Longxin FAN Hui LAN Muhammad JAMIL | 2020 | Chinese Journal of Aeronautics2020，33，9： | 6 |
| 3 | Design and Optimization of Reverse Salient Permanent Magnet Synchronous Motor Based on Controllable Leakage Flux显示文摘In this paper,a controllable leakage flux reverse salient permanent magnet synchronous motor(CLF-RSPMSM)is designed,which has the advantages of wide speed range and low irreversible demagnetization risk.Firstly,the principle of controllable leakage flux and reverse saliency effect is introduced,and the design of the rotor flux barrier is emphatically discussed.Secondly,multiple design variables are stratified by the comprehensive sensitivity method,and the main variables are screened out.Then the relationship between the main variables and the optimization goal is discussed according to the response surface diagram.Thirdly,a sequential nonlinear programming algorithm(SNP)is used to optimize the three optimization objectives comprehensively.Finally,the electromagnetic performance of the proposed motor is compared with the initial IPM motor,the mechanical strength of the proposed rotor is analyzed,and the results verify the effectiveness of the design and optimization method of the proposed motor. | Longxin Du Xiping Liu Jiesheng Fu Jianwei Liang Chaozhi Huang | 2021 | CES Transactions on Electrical Machines and Systems2021，5，2： | 5 |
| 4 | CPGs control method using a new oscillator in robotic fish显示文摘A new oscillator is presented in this paper based on our pervious oscillator (Zhang’s oscillator). Using this new oscillator, a bionic neural control system, the central pattern generators (CPGs) control system, is built. This control system has a two-level form. To validate the function of this new oscillator and the control system, simulations and experiments were both carried out, a simple robotic fish was built with three joints, and the results showed that the new oscillator can be used in startup and stop control mode, angle offset control mode and amplitude changing control mode. The new oscillator can be used in bionic CPGs control area with a simple form, and may be a new progress in bionic control. | WANG Gang*, ZHANG DaiBing, LIN LongXin, XIE HaiBin, HU TianJiang & SHEN LinCheng School of Mechatronics and Automation, National University of Defense Technology, Changsha 410073, China | 2010 | Science China(Technological Sciences)2010，53，11： | 4 |
| 5 | Energy principle and material removal sequence optimization method in machining of aircraft monolithic parts显示文摘In the machining process of aircraft monolithic parts,the initial residual stress redistribution and structural stiffness evolution often lead to unexpected distortions.On the other hand,the stress redistribution and stiffness reduction during the machining process depend on the material removal sequence.The essence of the stress redistribution is releasing the initial elastic strain energy.In the present study,the influence of the material removal sequence on the energy release is studied.Moreover,a novel optimization method is proposed for the material removal sequence.In order to evaluate the performance of the proposed method,the mechanism of the machining distortion is firstly analyzed based on the energy principle.Then a calculative model for the machining distortion of long beam parts is established accordingly.Moreover,an energy parameter related to the bending distortion and the procedure of the material removal sequence optimization is defined.Finally,the bending distortion analysis and material removal sequence optimization are performed on a long beam with a Z-shaped cross-section.Furthermore,simulation and experiments are carried out.The obtained results indicate that the optimized sequence results in a low distortion fluctuation and decreases the bending distortion. | Yinfei YANG Longxin FAN Liang LI Guolong ZHAO Ning HAN Xiaoyue LI Hui TIAN Ning HE | 2020 | Chinese Journal of Aeronautics2020，33，10： | 2 |
| 6 | Inhibition of aldose reductase activates hepatic peroxisome proliferator-activated receptor-a and ameliorates hepatosteatosis in diabetic db/dbMice显示文摘 | Qiu Longxin Lin Jianhui Xu Fangui etal | 2012 | Experimental Diabetes Research2012，18，： | 1 |
| 7 | Biological inspirations, kinematics modeling, mechanism design and experiments on an undulating robotic fin inspired by Gymnarchus niloticus显示文摘 | Tianjiang Hu Lincheng Shen Longxin Lin Haijun Xu | 2008 | Mechanism and Machine Theory2008，，3： | 1 |
| 8 | Application of the High Molecular Water-keeping Compound Sodium Polyacrylate in Agriculture显示文摘The proparties of the high molecular water- absorbing compound sodium polyacrylate(SP) and its application in agriculture are reviewed; and its safety in application is also introduced. | Li Qingfeng,Liu Delin,Jin Longxin,and Wu Lijun Hunan Institute of Atomic Energy Application in Agriculture,Changsha 410125,China | 2001 | Hunan Agricultural Science & Technology Newsletter2001，2，4： | 1 |
| 9 | Mechanism of heavy oilrecovery by cyclic superheated steam stimulation显示文摘 | XU Anzhu MU Longxin FAN Zifei | 2013 | Journal ofPetroleum Science and Engineering2013，111，21： | 1 |
| 10 | Energy-Aware Scheduling with Uncertain Execution Time for Real-Time Systems显示文摘Energy-saving is extraordinary important for real-time systems. Dynamic voltage scaling(DVS) is an important technique to reduce the energy consumption of processors that support voltage scaling. It has been exploited extensively in task scheduling. However, many approaches take simple treatments and some of them even neglect the large voltage transition overheads. Although some strategies consider the penalty, frequency switching produces extra large time overhead and deadline misses occur frequently. In our paper, we propose an energy efficient soft real-time dynamic program scheme by using quantitative switching overhead and communication penalty for multitask scheduling with uncertain execution time. The experiments show that our approaches significantly outperform existing solutions both on simple-core and multi-core systems in terms of energy-saving. | ZHANG Longxin TONG Zhao ZHU Ningbo XIAO Zheng LI Kenli | 2017 | Chinese Journal of Electronics2017，26，1： | 1 |
| 11 | Study on Triaxial Mechanical Properties and Micro Mechanism of Fly Ash Reinforced Cement Calcareous Sand显示文摘In order to study the mechanical properties and micro-mechanism of industrial waste fly ash-reinforced cement calcareous sand(FCS),the triaxial unconsolidated undrained(UU)test and scanning electron microscope tests(SEM)were carried out on it.The results of UU test show that the peak stress and energy dissipation of the FCS sample first increase and then decrease with the increase in fly ash content.Fly ash enhances the cement calcareous sand by increasing both the cohesion and internal friction angle,and adding 10%content of fly ash gives the largest values.The SEM test results shows that the hydration products of cement and fly ash filled the pores and cracks on the surface of the calcareous sand,which increased the compactness and structure of the FCS samples.The porosity of cement calcareous sand can be reduced from 27.6%to 12.8%by adding 10%fly ash.A brittleness evaluation index based on energy dissipation is proposed to quantitatively characterize the brittleness of FCS samples.The results show that when the content of fly ash is 5%,the brittleness of FCS samples is the lowest.This study shows that the mechanical properties of cement calcareous sand can be effectively enhanced by adding the appropriate amount of fly ash. | Ben Li Na Li Chulei Fang Jun Hu Rong Yu Longxin Shu Kai Yao Fang Zhang | 2022 | Journal of Renewable Materials2022，10，6： | 1 |
| 12 | Red Clover Extract Ameliorates Dyslipidemia in Streptozotocin‐induced Diabetic C57BL/6 Mice by Activating Hepatic PPARα显示文摘 | Longxin Qiu Hong Ye Limei Chen Yamin Hong Fojin Zhong Tingting Zhang | 2011 | Phytother. Res2011，，6： | 1 |
| 13 | Channel Sandstone Architecture Characterization by Seismic Simulation显示文摘To describe the distribution of sandstone reservoirs between wells finely,this paper takes the sandstone reservoir of Layer Nm II-4 in Qinhuangdao 32-6 Oilfield for example,and uses the seismic forward simulation and well loggings to study the channel sandstone reservoir. Under the guidance of the modern rivers and outcrops sandstone distribution pattern,the predicting limitations of the seismic forward simulation about channel sandstone boundaries such as mudstone interlayer between channel sandstone and elevation distance between adjacent channel sandstone are clear. The research shows that the mudstone interlayer can be described by seismic forward simulation seismic when the mudstone interlayer is thicker than 2 m and the channel sandstone is thicker than 10 m because of the appearance of the seismic peak when the main frequency of seismic data is nearly 60 Hz. And the elevation distance between adjacent channel sandstone can be described by the seismic forward simulation when elevation distance is longer than 6 m and the channel sandstone is thicker than 10 m because of the appearance of the seismic peak. And the seismic waveform features of single channel sandstone boundaries such as elevation distance between channels,overbank sandstone and abandoned channels. Under the study mentioned above,the single channel boundaries are described in Layer Nm II-4 of Qinhuangdao 32-6 Oilfield,and the predicting boundaries are confirmed by the chemical tracers. The results show that the channel sandstone reservoir architecture characterization can be improved by the seismic forward simulation. | Hongwei Liang Xiaoqing Zhao Longxin Mu Zifei Fan Lun Zhao Shenghe Wu | 2019 | Journal of Earth Science2019，30，4： | 1 |
| 14 | Effects of Different Potassium (K) Fertilizer Rates on Yield Formation and Lodging of Rice显示文摘As one of the most important nutrients for plants,potassium(K)has substantial effects on growth and development of crops.Present study was conducted in three different sites in South China in late season in 2019 with the objective to study the effects of different applied amounts of K fertilizer on yield formation and lodging of rice.Four K fertilizer treatments,K_(0):0 kg potassium oxide(K_(2)O)ha^(−1)(control);K_(1):64.20 kg K_(2)O ha^(−1);K_(2):128.55 kg K_(2)O ha^(−1) and K_(3)153.90 kg K_(2)O ha^(−1) were applied in the field experiment.The results showed that K_(2) and K_(3) treatments significantly increased panicle number per unit area,grain number per panicle,seed-setting rate and the grain yield of rice compared with K_(0) treatment.Higher net photosynthetic rates were recorded in K_(2) and K_(3) treatments than K_(0) treatment at tillering stage,heading stage and maturity stage.K fertilizer treatments also increased the chlorophyll content and dry matter accumulation by 6.16–23.52%and 21.32–64.59%compared with K_(0) treatment,respectively.Moreover,the total N and K accumulation in the aboveground tissues of rice significantly increased under K_(2) and K_(3) treatments compared with K_(0) treatment.Furthermore,compared with K_(0) treatment,K fertilizer treatments significantly enhanced the breaking-resistant strength by 40.94–144.24%and reduced the lodging index of rice by 13.14–36.72%. | Tantan Zhang Xiaoping He Binglin Chen Longxin He Xiangru Tang | 2021 | Phyton-International Journal of Experimental Botany2021，90，3： | 1 |
| 15 | Safety Analysis of Riding at Intersection Entrance Using Video Recognition Technology显示文摘To study riding safety at intersection entrance,video recognition technology is used to build vehicle-bicycle conflict models based on the Bayesian method.It is analyzed the relationship among the width of nonmotorized lanes at the entrance lane of the intersection,the vehicle-bicycle soft isolation form of the entrance lane of intersection,the traffic volume of right-turning motor vehicles and straight-going non-motor vehicles,the speed of right-turning motor vehicles,and straight-going non-motor vehicles,and the conflict between right-turning motor vehicles and straight-going nonmotor vehicles.Due to the traditional statistical methods,to overcome the discreteness of vehicle-bicycle conflict data and the differences of influencing factors,the Bayesian random effect Poisson-log-normal model and random effect negative binomial regression model are established.The results show that the random effect Poisson-log-normal model is better than the negative binomial distribution of random effects;The width of non-motorized lanes,the form of vehicle-bicycle soft isolation,the traffic volume of right-turning motor vehicles,and the coefficients of straight traffic volume obey a normal distribution.Among them,the type of vehicle-bicycle soft isolation facilities and the vehicle-bicycle traffic volumes are significantly positively correlated with the number of vehicle-bicycle conflicts.The width of non-motorized lanes is significantly negatively correlated with the number of vehicle-bicycle conflicts.Peak periods and flat periods,the average speed of right-turning motor vehicles,and the average speed of straight-going non-motor vehicles have no significant influence on the number of vehicle-bicycle conflicts. | Xingjian Xue Linjuan Ge Longxin Zeng Weiran Li Rui Song Neal N.Xiong | 2022 | Computers, Materials & Continua2022，，9： | 1 |
| 16 | Study on characteristics of well-test type curves for composite reservoir with sealing faults显示文摘The pressure response for the composite reservoirs with a sealing fault locating in inner and outer region is different,which neglected by previous researchers,would cause significant errors during well-test interpretations.Based on seepage theory,a well-test model of two-region radial composite reservoir with infinite outer boundary has been built in this study considering wellbore storage and skin effects.The solutions for this model and characteristics of the type curves have been analyzed by applying the method of mirror image,Laplace transformation and superposition principle,including a straight fault,a perpendicular fault and parallel faults cases.The study shows that the dimensionless pressure derivative curves would be obviously different in two cases:the well to fault distance is larger,and smaller than the half length of the inner-region radius.Therefore,type curves are presented with reasonable parameters to analyze the distance effect on the dynamic pressure response.The results in this study are of great significance。 | Qiguo Liu Heng Lu Longxin Li Aiting Mu | 2018 | Petroleum2018，4，3： | 1 |
| 17 | Inhibition of aldose reductase activates hepatic peroxisome proliferator-activated receptor-a and ameliorates hepatosteatosis in diabetic db/dbMice显示文摘 | Qiu Longxin Lin Jianhui Xu Fangui etal | 2012 | Experimental Diabetes Research2012，18，： | 1 |
| 18 | Red clover extract exerts antidiabetic and hypolipidemic effects indb/db mice显示文摘 | Longxin Qiu Tong Chen Fojin Zhong Yamin Hong Limei Chen Hong Ye | 2012 | Experimental and Therapeutic Medicine2012，，4： | 1 |
| 19 | Biochanin A ameliorates the cytokine secretion profile of lipopolysaccharide-stimulatedmacrophages by a PPARγ-dependent pathway显示文摘 | Longxin Qiu Bo Lin Zhenzhen Lin Yiping Lin Meicong Lin Xiaoyan Yang | 2012 | Molecular Medicine Reports2012，，1： | 1 |
| 20 | Mechanism of Heavy Oil Recov- ery by Cyclic Superheated Steam Stimulation 显示文摘 | Anzhu Xu Longxin Mu Zifei Fan Xianghong VVM Lun Zhao Bing Bo Ting Xu | 2013 | Journal of petroleum Science andEngineering2013，，： | 1 |
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