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Learning curve of total ankle replacement from the lateral approach 认领 引用 被引量：1
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作者 Henryk Liszka Artur Gądek +5 位作者 Anna Maria Zięba Kaja Surowiecka Jakub Kwiatkowski Tomasz Kozioł Michał Sebastian Bochenek Konrad Kwolek 《World Journal of Orthopedics》 2026年第3期52-63,共12页
BACKGROUND According to recent systematic reviews and meta-analyses,the long-term results of total ankle replacement(TAR)are equivalent or superior to ankle arthrodesis with an average 10-year survival approaching 90%... BACKGROUND According to recent systematic reviews and meta-analyses,the long-term results of total ankle replacement(TAR)are equivalent or superior to ankle arthrodesis with an average 10-year survival approaching 90%.Almost all fourth-generation TAR implants are inserted from the anterior approach except for ZimmerTM,which is implanted laterally and with lateral malleolus osteotomy.AIM To evaluate the clinical outcomes and complication rates and to define a multifactorial learning curve of lateral approach TAR.METHODS This single-center retrospective cohort study included 85 ZimmerTMlateralapproach TARs performed by one surgeon from 2019 to 2024.Patient-reported outcome measures were evaluated in 65 patients using the Manchester-Oxford Foot Questionnaire(MOXFQ)and European Foot and Ankle Society(EFAS)scores.Underlying diagnoses,functional outcomes,operative time trends,secondary procedures,and complications rates were analyzed to define a learning curve considering the first 60 consecutive cases.RESULTS The mean follow-up was 30.8 months.Post-traumatic arthritis was the most common underlying diagnosis accounting for 53.5%of cases.Mean EFAS improved by 13.0 points(P0.4),indicating that proficiency is readily achieved due to the short learning curve of this technique.Operative time decreased from approximately 175 min to 125 min after about 25-30 cases.Complication rates declined with experience.In the first 30 cases,there were 19 reoperations in 13 patients(43%)with an additional 5 being managed conservatively compared with 10 reoperations in 7 patients(23%)with 2 conservatively treated complications in the subsequent 30 cases(relative risk=1.86,P>0.05).Infection-related revisions also decreased markedly from 5(16.7%)to 1(3.3%)(relative risk=5.00,P>0.05)between these cohort.Two cases of deep infection occurred in patients with rheumatoid arthritis.One was successfully managed with debridement,and the other required implant removal with cement spacer implantation.CONCLUSION Lateral-approach TAR achieved early patient-reported outcome measure benefits with efficiency and safety improving with experience,requiring 30 cases.This rapid learning curve integrates functional outcomes,operative timing,and complication rates. 展开更多
关键词 Arthroplasty replacement ankle Osteoarthritis Ankle joint Surgical procedures operative methods Surgical approach Lateral approach Learning curve Patient-reported outcome measures
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Large-time asymptotic wave dynamics of rogue curves in the Davey-Stewartson Ⅰ equation 认领 引用
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作者 Qun Yuan Yi Zhang Bo Yang 《Communications in Theoretical Physics》 SCIE CAS CSCD 2026年第3期54-64,共11页
In this article,the large-time asymptotic wave dynamics of rogue curves are analytically investigated and numerically confirmed in the Davey-Stewartson(DS)I equation.We show that,when time in bilinear expressions of t... In this article,the large-time asymptotic wave dynamics of rogue curves are analytically investigated and numerically confirmed in the Davey-Stewartson(DS)I equation.We show that,when time in bilinear expressions of the rogue curves is large,a certain number of localized lump-shaped waves would arise on the uniform background,exhibiting various wave patterns.We further show that,as time increases,the individual lump-shaped wave asymptotically evolves into a line soliton on the constant background that persist at large time.By performing large-time asymptotic analysis,we reveal that such wave patterns as well as the numbers of lump-shaped waves can be analytically determined by the structure of nonzero roots of the Wronskian-Hermite polynomials.Our asymptotic predictions are compared to true solutions quantitatively and excellent agreement is obtained. 展开更多
关键词 Davey-StewartsonⅠequation rogue curves wave dynamics asymptotic bilinear method
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Bio-convective flow of gyrotactic microorganisms in nanofluid through a curved oscillatory channel with Cattaneo-Christov double diffusion theory 认领 引用
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作者 Imran M Naveed M +1 位作者 Rafiq M Y Abbas Z 《Chinese Physics B》 SCIE EI CAS CSCD 2026年第1期522-533,共12页
The present study investigates the flow,heat,and mass transfer analysis in the bioconvection of nanofluid containing motile gyrotactic microorganisms through a semi-porous curved oscillatory channel with a magnetic fi... The present study investigates the flow,heat,and mass transfer analysis in the bioconvection of nanofluid containing motile gyrotactic microorganisms through a semi-porous curved oscillatory channel with a magnetic field.These microorganisms produce density gradients by swimming,which induces macroscopic convection flows in the fluid.This procedure improves the mass and heat transfer,illustrating the interaction between biological activity and fluid dynamics.Furthermore,instead of considering traditional Fourier's and Fick's law the energy and concentration equations are developed by incorporating Cattaneo-Christov double diffusion theory.Moreover,to examine the influence of thermophoresis and Brownian diffusions in the fluid we have adopted the Buongiorno nanofluid model.Due to the oscillation of the surface of the channel,the mathematical development of the considered flow problem is obtained in the form of partial differential equations via the curvilinear coordinate system.The convergent series solution of the governing flow equations is obtained after applying the homotopy analysis method(HAM).The effects of different pertinent flow parameters on velocity,motile microorganism density distribution,concentration,pressure,temperature,and skin friction coefficient are examined and discussed in detail with the help of graphs and tables.It is observed during the current study that the density of microorganisms is enhanced for higher values of Reynolds number,Peclet number,radius of curvature variable,and Lewis number. 展开更多
关键词 semi-porous oscillatory curved channel gyrotactic microorganisms magnetohydrodynamic viscous nanofluid Cattaneo-Christov double diffusion homotopy analysis method
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Artificial intelligence large model for logging curve reconstruction 认领 引用 被引量：2
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作者 CHEN Zhangxing ZHANG Yongan +5 位作者 LI Jian HUI Gang SUN Youzhuang LI Yizheng CHEN Yuntian ZHANG Dongxiao 《Petroleum Exploration and Development》 SCIE 2025年第3期842-854,共13页
To improve the accuracy and generalization of well logging curve reconstruction,this paper proposes an artificial intelligence large language model“Gaia”and conducts model evaluation experiments.By fine-tuning the p... To improve the accuracy and generalization of well logging curve reconstruction,this paper proposes an artificial intelligence large language model“Gaia”and conducts model evaluation experiments.By fine-tuning the pre-trained large language model,the Gaia significantly improved its ability in extracting sequential patterns and spatial features from well-log curves.Leveraging the adapter method for fine-tuning,this model required training only about 1/70 of its original parameters,greatly improving training efficiency.Comparative experiments,ablation experiments,and generalization experiments were designed and conducted using well-log data from 250 wells.In the comparative experiment,the Gaia model was benchmarked against cutting-edge small deep learning models and conventional large language models,demonstrating that the Gaia model reduced the mean absolute error(MAE)by at least 20%.In the ablation experiments,the synergistic effect of the Gaia model's multiple components was validated,with its MAE being at least 30%lower than that of single-component models.In the generalization experiments,the superior performance of the Gaia model in blind-well predictions was further confirmed.Compared to traditional models,the Gaia model is significantly superior in accuracy and generalization for logging curve reconstruction,fully showcasing the potential of large language models in the field of well-logging.This provides a new approach for future intelligent logging data processing. 展开更多
关键词 logging curve reconstruction large language model adapter pre-trained model fine-tuning method
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Free vibration and transient response of double curved beams connected by intermediate straight beams 认领 引用 被引量：1
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作者 R.A.JAFARI-TALOOKOLAEI H.GHANDVAR +2 位作者 E.JUMAEV S.KHATIR T.CUONG-LE 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI CSCD 2025年第1期37-62,共26页
This paper investigates the free vibration and transient response of interconnected structures including double curved beams and intermediate straight beams,which are all constructed from functionally graded porous(FG... This paper investigates the free vibration and transient response of interconnected structures including double curved beams and intermediate straight beams,which are all constructed from functionally graded porous(FGP)materials.The strain potential and kinetic energies of each beam along with the work done by the external force are calculated.Additionally,a higher-order beam element is introduced to derive stiffness and mass matrices,along with the force vector.The curved and straight beams are discretized,and their assembled stiffness,mass matrices,and force vectors,are obtained.Continuity conditions at the joints are used to derive the total matrices of the entire structure.Subsequently,the natural frequencies and transient response of the system are determined.The accuracy of the mathematical model and the self-developed computer program is validated through the comparison of the obtained results with those of the existing literature and commercial software ANSYS,demonstrating excellent agreement.Furthermore,a comprehensive study is conducted to investigate the effects of various parameters on the free vibration and transient response of the considered structure. 展开更多
关键词 double curved beam vibration analysis intermediate straight beam functionally graded porous(FGP)material finite element method
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Improved Nonlinear Equation Method for Numerical Prediction of Jominy End-Quench Curves 认领 引用 被引量：8
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作者 SONG Yue-peng LIU Guo-quan +2 位作者 LIU Sheng-xin LIU Jian-tao FENG Cheng-ming 《Journal of Iron and Steel Research International》 SCIE CAS 2007年第1期37-41,共5页
Without considering the effects of alloying interaction on the Jominy end-quench curves, the prediction resuits obtained by YU Bai-hai＇s nonlinear equation method for multi-alloying steels were different from those e... Without considering the effects of alloying interaction on the Jominy end-quench curves, the prediction resuits obtained by YU Bai-hai＇s nonlinear equation method for multi-alloying steels were different from those experimental ones reported in literature. Some alloying elements have marked influence on Jominy end-quench curves of steels. An improved mathematical model for simulating the Jominy end-quench curves is proposed by introducing a parameter named alloying interactions equivalent （Le）. With the improved model, the Jominy end-quench curves of steels so obtained agree very well with the experimental ones. 展开更多
关键词 Jominy end-quench curve nonlinear equation method alloying interaction parameter computer simulation
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Structural Stress-Fatigue Life Curve Improvement of Spot Welding Based on Quasi‑Newton Method 认领 引用 被引量：4
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作者 Yahang Qin Shoune Xiao +3 位作者 Liantao Lu Bing Yang Xiangjie Li Guangwu Yang 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2020年第2期140-151,共12页
ΔF-N curves are usually used to predict the fatigue life of spot welding in engineering,but they are time-consuming and laborious and not universal.For the purpose of predicting the fatigue life of spot welding accur... ΔF-N curves are usually used to predict the fatigue life of spot welding in engineering,but they are time-consuming and laborious and not universal.For the purpose of predicting the fatigue life of spot welding accurately and efficiently,tensile-shear fatigue tests were conducted to obtain the fatigue life of spot-welded specimens with different sheet thicknesses combinations.These specimens were simulated by using the finite element method,and the structural stress was theoretically calculated.In the double logarithmic coordinate system,the structural stress-fatigue life(S-N)curve of spot welding was fitted by the least-squares method,based on the quasi-Newton method.The square of the correlation coefficient of the S-N curve was taken as the optimization objective,with the correction coefficients of force,bending moment,spot welding diameter,and sheet thickness as the variables.During the optimization process,three different ways were utilized to get three optimized spot welding S-N curves,which are suitable for different situations.The results show that the fitting effect of the S-N curve is improved,the data points are more compact,and the optimization effect is significant.These S-N curves can be used to predict the fatigue life,which provide the basis for practical engineering application. 展开更多
关键词 Spot welding Structural stress S-N curve Quasi-Newton method Correction coefficient
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The Testing Strength Curves of Lightweight Aggregate Concrete by Rebound Method and Ultrasonic-rebound Combined Method 认领 引用 被引量：3
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作者 RONG Hui QIAN Chunxiang +2 位作者 GAO Lixiong HAN Jiande WANG Caihui 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2011年第5期1010-1017,共8页
The strength curves of lightweight aggregate concrete(LWAC)were tested based on detecting LWAC with density of 1400-1900 kg/m3 and LWAC with strength grade of LC15-LC50 by rebound method and ultrasonic-rebound combine... The strength curves of lightweight aggregate concrete(LWAC)were tested based on detecting LWAC with density of 1400-1900 kg/m3 and LWAC with strength grade of LC15-LC50 by rebound method and ultrasonic-rebound combined method.The results show that the common measured strength curves tested by above two methods can not satisfy the required accuracy of LWAC strength test.In addition,specified compressive strength curves of testing LWAC by rebound method and ultrasonic-rebound combined method are obtained,respectively. 展开更多
关键词 lightweight aggregate concrete compressive strength rebound method testing-strength curve ultrasonic-rebound combined method
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A New Curve Fitting Method for Forming Limit Experimental Data 认领 引用 被引量：5
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作者 Jieshi CHEN Xianbin ZHOU 《Journal of Materials Science & Technology》 SCIE EI CAS 2005年第4期521-525,共5页
The forming limit curve （FLC） can be obtained by means of curve fitting the limit strain points of different strain paths. The theory of percent regression analysis is applied to the curve fitting of forming limit e... The forming limit curve （FLC） can be obtained by means of curve fitting the limit strain points of different strain paths. The theory of percent regression analysis is applied to the curve fitting of forming limit experimental data.Forecast intervals of FLC percentiles can be calculated. Thus reliability and confidence level can be considered. The theoretical method to get the limits of limit strain points distributing region is presented, and the FLC position can be adjusted according to practical requirement. Method for establishing FLC with high reliability using small samples is presented at the same time. This method can make full use of the current experimental data and the previous data.Compared with the traditional method that can only use current experimental data, fewer specimens are required in the present method to obtain the same precision and the result is more accurate with the same number of specimens. 展开更多
关键词 Forming limit curve Regression analysis Reliability analysis Small samples method
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A new slope optimization design based on limit curve method 认领 引用 被引量：4
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作者 FANG Hong-wei CHEN Yohchia DENG Xiao-wei 《Journal of Central South University》 SCIE EI CAS CSCD 2019年第7期1856-1862,共7页
A new method is proposed for slope optimization design based on the limit curve method, where the slope is in the limit equilibrium state when the limit slope curve determined by the slip-line field theory and the slo... A new method is proposed for slope optimization design based on the limit curve method, where the slope is in the limit equilibrium state when the limit slope curve determined by the slip-line field theory and the slope intersect at the toe of the slope. Compared with the strength reduction (SR) method, finite element limit analysis method, and the SR method based on Davis algorithm, the new method is suitable for determining the slope stability and limit slope angle (LSA). The optimal slope shape is determined based on a series of slope heights and LSA values, which increases the LSA by 2.45°-11.14° and reduces an invalid overburden amount of rocks by 9.15%, compared with the space mechanics theory. The proposed method gives the objective quantification index of instability criterion, and results in a significant engineering economy. 展开更多
关键词 slope optimization design limit state limit curve method limit slope angle
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Thermal Modal Analysis of Doubly Curved Shell Based on Rayleigh⁃Ritz Method 认领 引用 被引量：4
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作者 ZHANG Yongfeng ZHU Ziyuan WANG Gang 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI CSCD 2022年第1期58-65,共8页
The doubly curved shell(DCS)is a common structure in the engineering field.In a thermal environment,the vibration characteristics of the DCS will be affected by the thermal effect.The research on the vibration charact... The doubly curved shell(DCS)is a common structure in the engineering field.In a thermal environment,the vibration characteristics of the DCS will be affected by the thermal effect.The research on the vibration characteristics of DCS in thermal environment is relatively limited.In this paper,the thermal strain and the change of Young’s modulus caused by the changing of temperature are studied,and the DCS energy equation is established systematically.The displacement tolerance function of the DCS is constructed by the spectral geometry method,and the natural frequencies and mode shapes of the DCS with different structural parameters,such as thicknesses,ratios of Ra/Rb and a/b,at different temperatures are solved by the Rayleigh-Ritz method.The results show that the natural frequency of the DCS decreases with the increasing temperature,Ra/Rb and a/b ratios,and increases with the increasing thickness. 展开更多
关键词 doubly curved shell thermal environment Rayleigh-Ritz method natural frequencies
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A Maximum Likelihood Method for Estimating Probabilistic Strain Amplitude-Fatigue Life Curves 认领 引用 被引量：3
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作者 Huanhuan Feng Yanrong Wang Xianghua Jiang 《Acta Mechanica Solida Sinica》 SCIE EI CSCD 2018年第1期80-93,共14页
The fatigue lives of materials and structures at different strain levels show het- eroscedasticity. In addition when the number of test specimens is insufficient, the fatigue strength coefficient and fatigue ductility... The fatigue lives of materials and structures at different strain levels show het- eroscedasticity. In addition when the number of test specimens is insufficient, the fatigue strength coefficient and fatigue ductility coefficient of the fitting parameters in the total strain life equa- tion may not have definite physical significance. In this work, a maximum likelihood method for estimating probabilistic strain amplitude fatigue life curves is presented based on the fatigue lives at different strain levels. The proposed method is based on the general basic assumption that the logarithm of fatigue life at an arbitrary strain level is normally distributed. The rela- tionship among the parameters of total strain life equation, monotonic ultimate tensile stress and percentage reduction of area is adopted. The presented approach is finally illustrated by two applications. It is shown that probabilistic strain amplitude-fatigue life curves can be eas- ily estimated based on the maximum likelihood method. The results show that fatigue lives at different strain levels have heteroscedasticity and the values of fatigue strength coefficient and fatigue ductility coefficient obtained by the proposed method are close to those of the true tensile fracture stress and true tensile fracture strain. 展开更多
关键词 Fatigue life Maximum likelihood method Probabilistic strain amplitude fatiguelife curves Heteroscedasticity
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An analytical p-y curve method based on compressive soil pressure model in sand soil 认领 引用 被引量：3
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作者 JIANG Jie FU Chen-zhi +2 位作者 WANG Shun-wei CHEN Chao-qi OU Xiao-duo 《Journal of Central South University》 SCIE EI CAS CSCD 2022年第6期1987-2004,共18页
With the high-quality development of urban buildings,higher requirements are come up with for lateral bearing capacity of laterally loaded piles.Consequently,a more accurate analysis to predict the lateral response of... With the high-quality development of urban buildings,higher requirements are come up with for lateral bearing capacity of laterally loaded piles.Consequently,a more accurate analysis to predict the lateral response of the pile within an allowable displacement is an important issue.However,the current p-y curve methods cannot fully take into account the pile-soil interaction,which will lead to a large calculation difference.In this paper,a new analytical p-y curve is established and a finite difference method for determining the lateral response of pile is proposed,which can consider the separation effect of pile-soil interface and the coefficient of circumferential friction resistance.In particular,an analytical expression is developed to determine the compressive soil pressure by dividing the compressive soil pressure into two parts:initial compressive soil pressure and increment of compressive soil pressure.In addition,the relationship between compressive soil pressure and horizontal displacement of the pile is established based on the reasonable assumption.The correctness of the proposed method is verified through four examples.Based on the verified method,a parametric analysis is also conducted to investigate the influences of factors on lateral response of the pile,including internal friction angle,pile length and elastic modulus of pile. 展开更多
关键词 laterally loaded piles compressive soil pressure model separation effect of pile-soil interface coefficient of circumferential friction resistance analytical p-y curve finite difference method
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WEIGHTED LEAST SQUARE METHOD FOR S-N CURVE FITTING 认领 引用 被引量：8
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作者 吉凤贤 姚卫星 《Transactions of Nanjing University of Aeronautics and Astronautics》 2004年第1期53-57,共5页
An S-N curve fitting approach is proposed based on the weighted least square method, and the weights are inversely proportional to the length of mean confidence intervals of experimental data sets. The assumption coin... An S-N curve fitting approach is proposed based on the weighted least square method, and the weights are inversely proportional to the length of mean confidence intervals of experimental data sets. The assumption coincides with the physical characteristics of the fatigue life scatter. Two examples demonstrate the method. It is shown that the method has better accuracy and reasonableness compared with the usual least square method. 展开更多
关键词 fatigue test S-N curve weighted least square method confidence interval
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Calculation method of sliding ratios for conjugate-curve gear pair and its application 认领 引用 被引量：4
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作者 梁栋 陈兵奎 高艳娥 《Journal of Central South University》 SCIE EI CAS CSCD 2015年第3期946-955,共10页
The calculation method of sliding ratios for conjugate-curve gear pair, generated based on the theory of conjugate curves,is proposed. The theoretical model of conjugate-curve gear drive is briefly introduced. The gen... The calculation method of sliding ratios for conjugate-curve gear pair, generated based on the theory of conjugate curves,is proposed. The theoretical model of conjugate-curve gear drive is briefly introduced. The general calculation formulas of sliding ratios are developed according to the conjugate curves. The applications to the circular arc gears based on conjugate curves and the novel involute-helix gears are studied. A comparison on the sliding coefficient with the conventional corresponding gear drive is also carried out. The influences of gear parameters such as spiral parameter, gear ratio and modulus on the sliding ratios of gear drive are discussed. Brief description of manufacturing method for conjugate-curve gear pair is given. The research results show that the sliding ratios of gear pair become smaller with the increase of spiral parameter and gear ratio, respectively. And it will be greater with the increase of modulus for the tooth profiles. The meshing characteristics of conjugate-curve gears are further reflected and the optimization design of tooth profiles with high performance may be obtained. 展开更多
关键词 conjugate-curve gear conjugate curve sliding ratio manufacturing method
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A transition method based on Bezier curve for trajectory planning in cartesian space 认领 引用 被引量：1
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作者 张少林 Jing Fengshui Wang Shuo 《High Technology Letters》 EI CAS 2017年第2期141-148,共8页
In order to smooth the trajectory of a robot and reduce dwell time,a transition curve is introduced between two adjacent curves in three-dimensional space.G2 continuity is guaranteed to transit smoothly.To minimize th... In order to smooth the trajectory of a robot and reduce dwell time,a transition curve is introduced between two adjacent curves in three-dimensional space.G2 continuity is guaranteed to transit smoothly.To minimize the amount of calculation,cubic and quartic Bezier curves are both analyzed.Furthermore,the contour curve is characterized by a transition parameter which defines the distance to the corner of the deviation.How to define the transition points for different curves is presented.A general move command interface is defined for receiving the curve limitations and transition parameters.Then,how to calculate the control points of the cubic and quartic Bezier curves is analyzed and given.Different situations are discussed separately,including transition between two lines,transition between a line and a circle,and transition between two circles.Finally,the experiments are carried out on a six degree of freedom(DOF) industrial robot to validate the proposed method.Results of single transition and multiple transitions are presented.The trajectories in the joint space are also analyzed.The results indicate that the method achieves G2 continuity within the transition constraint and has good efficiency and adaptability. 展开更多
关键词 transition method Bezier curve G2 continuity transition constraint
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Simplified Method and Influence Factors of Vibration Characteristics of Isolated Curved Girder Bridge 认领 引用 被引量：1
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作者 Tongfa Deng Junping Zhang Mahmoud Bayat 《Structural Durability & Health Monitoring》 EI 2018年第3期189-212,共24页
The isolated curved girder bridge's vibration characteristics play a major part in the seismic responses of structures and anti-seismic properties.A clear analytic relationship between design parameters and the sy... The isolated curved girder bridge's vibration characteristics play a major part in the seismic responses of structures and anti-seismic properties.A clear analytic relationship between design parameters and the system's vibration characteristics could be established by its simplified dynamic analysis model,making it convenient for providing a reference to the optimization of design and safety analysis.A double-mass six-degree-of-freedom model for curved girder bridges with isolation bearings installed at the top of the bridge piers is built and a simplified analysis method for the vibration characteristics of the system is provided.Combined with the Matlab programming,the influences of radius of curvature,central angle,bridge deck width and damping ratio of the isolation layer and circular frequency of the isolation layer of isolated curved girder bridges on the pseudo-undamped natural circular frequency(called pseudo-frequency for short)and system damping ratio are systematically analyzed,and the sensitivity of vibration characteristics of isolated curved girder bridges is studied.The results show that the vibration characteristics of isolated curved girder bridges can be reflected well with this simplified model and calculation method.The pseudo-frequency of curved girder and system damping ratios increases with the increase of the isolation layer.The third-order vibration characteristic is more sensitive to the parameters of a curved girder,and the first-order vibration characteristic is sensitive to both central angle and radius of curvature to some extent while insensitive to the width of the bridge deck.Furthermore,the second-order vibration characteristic is not sensitive to the parameters of a curved girder. 展开更多
关键词 Seismic isolation curved girder bridge vibration characteristics sensitivity analysis simplified analysis method
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Evalution of Application of p-y Curve Method in Offshore Engineering Foundation 认领 引用 被引量：3
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作者 Jin Weiliang, Zhu Yuming and Li Linpu Associate Professor, Dr. -Eng., Zhejiang University, Hangzhou Engineer, Metallurgical Building Design and Research Institute, Beijing Associate Professor, Dalian University of Technology, Dalian 《China Ocean Engineering》 SCIE EI 1993年第4期451-466,共16页
Based on the Mohr-Coulomb failure principle and Rankine's theory, the laterally loaded pile ultimate resistance formulas of sand and soft clay proposed by Reese and Matlock respectively are discussed in this paper... Based on the Mohr-Coulomb failure principle and Rankine's theory, the laterally loaded pile ultimate resistance formulas of sand and soft clay proposed by Reese and Matlock respectively are discussed in this paper. The authors put forward the modified ultimate resistance formulas on the basis of which the ultimate resistance formula is developed for horizontally loaded pile in multi-layer soil in consideration of the effect of the overburden soil pressure on the calculation of soil layer. It is significant to the correct application of the ultimate resistance formulas in API and ZCS Rules into offshore engineering. 展开更多
关键词 pile multi-layer soil p-y curve method overburden soil pressure ultimate resistance
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Dynamic modeling and analysis of vortex filament motion using a novel curve-fitting method 认领 引用 被引量：2
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作者 Chang-Joo Kim Soo Hyung Park +1 位作者 Sang Kyung Sung Sung-Nam Jung 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2016年第1期53-65,共13页
Applications of a novel curve-fitting technique are presented to efficiently predict the motion of the vortex filament, which is trailed from a rigid body such as wings and rotors. The gov- erning equations of the mot... Applications of a novel curve-fitting technique are presented to efficiently predict the motion of the vortex filament, which is trailed from a rigid body such as wings and rotors. The gov- erning equations of the motion, when a Lagrangian approach with the present curve-fitting method is applied, can be transformed into an easily solvable form of the system of nonlinear ordinary dif- ferential equations. The applicability of Bezier curves, B-spline, and Lagrange interpolating polyno- mials is investigated. Local Lagrange interpolating polynomials with a shift operator are proposed as the best selection for applications, since it provides superior system characteristics with minimum computing time, compared to other methods. In addition, the Gauss quadrature formula with local refinement strategy has been developed for an accurate prediction of the induced velocity computed with the line integration of the Biot-Savart law. Rotary-wing problems including a vortex ring problem are analyzed to show the efficiency, accuracy, and flexibility in the applications of the pro- posed method. 展开更多
关键词 Aerodynamics Biot-Savart law Curve-fitting method Free-vortex wake Rotary wing Vortex filament
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Examination of Potential Energy Curves of CFCl by Multi-reference Configuration Interaction Method 认领 引用
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作者 孙二平 刘启鑫 +3 位作者 任廷琦 单石敏 徐海峰 闫冰 《Chinese Physics Letters》 SCIE EI CAS CSCD 2015年第12期43-46,共4页
We give a detailed examination of potential energy curves of the singlet and triplet states of CFC1 correlated with the lowest three dissociation limits. The calculations are carried out at the internally contracted m... We give a detailed examination of potential energy curves of the singlet and triplet states of CFC1 correlated with the lowest three dissociation limits. The calculations are carried out at the internally contracted multi- reference configuration interaction/cc-pV（T＋d）Z level with the other two geometric parameters fixed at the state equilibrium conformation. The vertical transition energy, the oscillator strength, the main configuration and the electron transition are also investigated at the same level. 展开更多
关键词 Examination of Potential Energy Curves of CFCl by Multi-reference Configuration Interaction Method Cl length CFC
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