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Representation of the ENSO Combination Mode and its Asymmetric SST Response in Different Resolutions of HadGEM3 认领 引用 被引量：1
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作者 Jianghua WAN Hongli REN Peili WU 《Advances in Atmospheric Sciences》 SCIE CAS CSCD 2018年第8期167-180,共14页
Previous studies have revealed a combination mode （C-mode） occurring in the Indo-Pacific region, arising from nonlinear interactions between ENSO and the western Pacific warm pool annual cycle. This paper evaluates ... Previous studies have revealed a combination mode （C-mode） occurring in the Indo-Pacific region, arising from nonlinear interactions between ENSO and the western Pacific warm pool annual cycle. This paper evaluates the simulation of this C-mode and its asymmetric SST response in HadGEM3 and its resolution sensitivity using three sets of simulations at horizontal resolutions of N96, N216 and N512. The results show that HadGEM3 can capture well the spatial pattern of the C-mode associated surface wind anomalies, as well as the asymmetric response of SST in the tropical Pacific, but it strongly overestimates the explained variability of the C-mode compared to the ENSO mode. The model with the three resolutions is able to reproduce the distinct spectral peaks of the C-mode at the near annual combination frequencies, but the performance in simulating the longer periods is not satisfactory, presumably due to the unrealistic simulation of the ENSO mode. Increasing the horizontal resolution can improve the consistency between atmospheric and oceanic representations of the C-mode, but not necessarily enhance the accuracy of C-mode simulation compared with observation. 展开更多
关键词 ENSO combination mode asymmetric response Nifio-A index HadGEM3 horizontal resolution
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An improved conditional denoising diffusion GAN for Mach number field reconstruction in a multi-tunnel combined inlet based on sparse parameter information 认领 引用
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作者 Ke MIN Fan LEI +2 位作者 Jiale ZHANG Chengxiang ZHU Yancheng YOU 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2026年第1期169-190,共22页
The internal flow fields within a three-dimensional inward-tunning combined inlet are extremely complex,especially during the engine mode transition,where the tunnel changes may impact the flow fields significantly.To... The internal flow fields within a three-dimensional inward-tunning combined inlet are extremely complex,especially during the engine mode transition,where the tunnel changes may impact the flow fields significantly.To develop an efficient flow field reconstruction model for this,we present an Improved Conditional Denoising Diffusion Generative Adversarial Network(ICDDGAN),which integrates Conditional Denoising Diffusion Probabilistic Models(CDDPMs)with Style GAN,and introduce a reconstruction discrimination mechanism and dynamic loss weight learning strategy.We establish the Mach number flow field dataset by numerical simulation at various backpressures for the mode transition process from turbine mode to ejector ramjet mode at Mach number 2.5.The proposed ICDDGAN model,given only sparse parameter information,can rapidly generate high-quality Mach number flow fields without a large number of samples for training.The results show that ICDDGAN is superior to CDDGAN in terms of training convergence and stability.Moreover,the interpolation and extrapolation test results during backpressure conditions show that ICDDGAN can accurately and quickly reconstruct Mach number fields at various tunnel slice shapes,with a Structural Similarity Index Measure(SSIM)of over 0.96 and a Mean-Square Error(MSE)of 0.035%to actual flow fields,reducing time costs by 7-8 orders of magnitude compared to Computational Fluid Dynamics(CFD)calculations.This can provide an efficient means for rapid computation of complex flow fields. 展开更多
关键词 Flow field reconstruction Improved Conditional Denoising Diffusion Generative Adversarial Network(ICDDGAN) Mode transition Sparse parameter information Three-dimensional inward-tunning combined inlet
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Research on the Combination Mode of Modem Product and Industrial Design under the Green Design Background 认领 引用
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作者 Liying Wu 《International Journal of Technology Management》 2016年第3期57-59,共3页
In this paper, we conduct research on the combination mode of the modern product and the industrial design under the green design background. Our enterprises must set up the industrial design as the basis of the new m... In this paper, we conduct research on the combination mode of the modern product and the industrial design under the green design background. Our enterprises must set up the industrial design as the basis of the new mechanism, treatment of product, enterprise and market to trinity, cannot be indifferent to a certain aspect, to every aspect, to attach importance to technology, hard management talents, on the basis of industrial designers should play the role of soft energetically. Industrial design should have good adhesive property, product, enterprise and market more harmonious, more closely linked, creation of the technical performance, reasonable internal structure, a novel appearance, low production cost, a profound cultural products, for the enterprise to bring the most lucrative business profits, and make the market more prosperous more standardized. Under this background, we propose the novel combination pattern that holds special meaning. 展开更多
关键词 Combination Mode Product and Industrial Design Green Design Trend.
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Adaptive configuration control of combined UAVs based on leader-wingman mode 认领 引用 被引量：2
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作者 Rui HUANG Hanlin SHENG +4 位作者 Qian CHEN Ziting RAN Zhen XUE Jiacheng LI Tong LIU 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2024年第12期416-433,共18页
Modular Unmanned Aerial Vehicles(UAVs)can adapt to rapidly changing payload requirements based on the shape and weight of the load by adding or subtracting units,reconfiguring,or changing the type of units.The existin... Modular Unmanned Aerial Vehicles(UAVs)can adapt to rapidly changing payload requirements based on the shape and weight of the load by adding or subtracting units,reconfiguring,or changing the type of units.The existing research has addressed aerial docking and hover control post-docking but fails to achieve coordinated flight following combination,leading to delayed response and oscillations as the number of UAV units increases.Moreover,the configuration of modular UAVs is complex and variable,making it challenging to adjust the controller parameters of each unit online.Therefore,this paper presents:(A)Adaptive attitude allocation method for different combined UAV configurations:establishing a mapping relationship between constant controller parameters of the unit and the combination angular acceleration.The desired torque of the combination is allocated based on the size of the lever arm,enabling adaptive attitude control of the combination for varying configurations by controlling the attitude of the local unit;(B)A power allocation strategy based on a leader-wingman mode:employing a leader to control the entire combination,distributing the combination’s force and torque to wingman units according to the mapping relationship of the attitude allocation method.This transforms the complex control of the combination into unit control in the leader-wingman mode.Compared to current average allocation methods,the step response of attitude angle improves by about 60% on average,and spatial trajectory tracking increases by an average of 11.5%.As the number of units grows,the response of the combination becomes similar to that of a single,independently flying UAV,resolving the oscillation issue in combined flight.Additionally,this approach eliminates the need to change the controller parameters of all units,facilitating convenient reconfiguration and coordinated flight for modular UAVs post-combination. 展开更多
关键词 Unmanned aerial vehicle Combined UAVs control Modular UAVs control Leader-wingman mode Adaptive attitude allocation Power allocation
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An improved displacement-based adaptive pushover procedure based on factor modal combination rule 认领 引用 被引量：2
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作者 Abbasnia R Tajik Davoudi A Maddah M.M 《Earthquake Engineering and Engineering Vibration》 SCIE EI CSCD 2014年第2期223-241,共19页
An accurate estimation of the applied load pattern is an essential component in each pushover procedure. Recently, a number of adaptive pushover methods have been proposed in which the effects of the higher modes as w... An accurate estimation of the applied load pattern is an essential component in each pushover procedure. Recently, a number of adaptive pushover methods have been proposed in which the effects of the higher modes as well as the progressive changes in the dynamic characteristics of structures are taken into account to compute the applied load pattern. The basic shortcoming of these advanced pushover methods is related to employing the quadratic modal combination rule, whereby the sign reversals of the modal load vectors are suppressed. In this study, an improved displacement-based adaptive pushover method is developed in which the applied load pattern is computed using the factor modal combination rule(FMC). In the proposed procedure, multiple load patterns, depending on the number of the modes considered, are determined in order to take into account the sign reversals of different modal load vectors. The accuracy of the proposed method is verifi ed for seven moment resisting frame buildings of 3, 9 and 20 stories with regularity or vertically geometric and mass irregularities subjected to 60 earthquake ground motion records. The results showed that the proposed methodology is capable of reproducing the peak dynamic responses with very good accuracy. 展开更多
关键词 adaptive pushover higher modes sign reversal factor modal combination rule
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A HALF PLANE CRACK UNDER THREE-DIMENSIONAL COMBINED MODE IMPACT LOADING 认领 引用 被引量：4
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作者 柳春图 李湘平 《Acta Mechanica Sinica》 SCIE EI CAS 1994年第1期40-48,共9页
The dynamic stress intensity factor history for a half plane crack in an otherwise unbounded elastic body, with the crack faces subjected to a traction distribution consisting of two pairs of suddenly-applied shear li... The dynamic stress intensity factor history for a half plane crack in an otherwise unbounded elastic body, with the crack faces subjected to a traction distribution consisting of two pairs of suddenly-applied shear line loads is consid- ered. The analytic expression for the combined mode stress intensity factors as a function of time is obtained. The method of solution is based on the application of integral transforms and the Wiener-Hopf technique. Some features of the solutions are discussed and graphical numerical results are presented. 展开更多
关键词 impact line loads a half plane crack combined mode dynamic stress intensity factor
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A solution strategy combining the mode superposition method and time integration methods for linear dynamic systems 认领 引用 被引量：1
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作者 Yufeng Xing Lu Yao Yi Ji 《Acta Mechanica Sinica》 SCIE EI CAS CSCD 2022年第6期167-181,I0004,共15页
In this article,the mode superposition method is combined with a time integration method like the trapezoidal rule to improve solution accuracy for linear dynamic systems.In this combination strategy,the essential thi... In this article,the mode superposition method is combined with a time integration method like the trapezoidal rule to improve solution accuracy for linear dynamic systems.In this combination strategy,the essential thing is to decompose a dynamic system into two sub-systems,a small-scale low-frequency system and a high-frequency system.The former can be analytically and efficiently solved with the mode superposition method,and the latter is dealt with through a time integration method such as the Newmark method.The summation of the responses of these two sub-systems is the responses of the original dynamic system.It is concluded that,with little sacrifice of efficiency,the combination method based on the strategy is more accurate than the combined time integration method,but it has the same accuracy order as that of the combined method.Numerical experiments validate the effectiveness of the proposed strategy. 展开更多
关键词 Mode superposition method Time integration method Accuracy Combination
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Combined model of trip mode and destination 认领 引用 被引量：1
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作者 姜雨 陆键 《Journal of Southeast University(English Edition)》 EI CAS 2010年第4期633-637,共5页
This paper analyzes the characteristics of the destination distribution of trips and proposes a stratified sampling strategy for travel mode choice.The stratified sampling strategy can reduce the size of the alternati... This paper analyzes the characteristics of the destination distribution of trips and proposes a stratified sampling strategy for travel mode choice.The stratified sampling strategy can reduce the size of the alternative set;thus,the computation burden of simulation is decreased.Using the stratified sampling strategy,a combined choice model of the trip mode and destination is developed based on the Bayesian theory.Simulations are carried out to verify the proposed model.The results show that the combined choice model of the trip mode and destination can efficiently simulate travelers＇ choice behaviors.Furthermore,the forecasting accuracy of the combined choice model is higher than the one of the gravity model.Therefore,the proposed model is a powerful tool with which to analyze travelers＇ behaviors in selecting the trip mode. 展开更多
关键词 combined choice model discrete choice trip mode and destination sampling
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Generation/collection mode of SECM with combined probe 认领 引用
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作者 Wei Wang Jie Zhang +2 位作者 LianHuan Han DeZhi Yang Dong Ping Zhan 《Chinese Chemical Letters》 SCIE CAS CSCD 2012年第1期86-88,共3页
Here we report a novel generation/collection operation mode of scanning electrochemical microscopy,in which a theta micropipette was employed to support two adjacent water/1,2-dichloroethane interfaces separated by th... Here we report a novel generation/collection operation mode of scanning electrochemical microscopy,in which a theta micropipette was employed to support two adjacent water/1,2-dichloroethane interfaces separated by the thin central glass wall：one acts as the generator while the other as the collector.The generation current,collection current and collection efficiency were enhanced significantly when the tip approached to an insulate substrate. 展开更多
关键词 SECM Generation/collection mode Combined probe
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A New Fracture Criterion for a Crack under Combined Mode Loading 认领 引用
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作者 周小平 王建华 《Journal of Shanghai Jiaotong university(Science)》 2003年第1期89-91,共3页
A new fracture criterion was proposed. The physical explanation of the criterion is that crack will propagate when the minimum strain energy density in iso hoop stress curve reach a critical strength of the material c... A new fracture criterion was proposed. The physical explanation of the criterion is that crack will propagate when the minimum strain energy density in iso hoop stress curve reach a critical strength of the material considered. The resulting curve of critical fracture of mixed mode cracks shows that the present fracture is efficient and more accurate than the previous criteria. 展开更多
关键词 fracture criterion combined mode loading minimum strain energy density in iso hoop stress curve
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Non-singular fast terminal sliding mode control for roll-pitch seeker based on extended state observers 认领 引用 被引量：1
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作者 XIAO Bowen XIA Qunli 《Journal of Systems Engineering and Electronics》 SCIE CSCD 2025年第2期537-551,共15页
For air-to-air missiles, the terminal guidance’s preci-sion is directly contingent upon the tracking capabilities of the roll-pitch seeker. This paper presents a combined non-singular fast terminal sliding mode contr... For air-to-air missiles, the terminal guidance’s preci-sion is directly contingent upon the tracking capabilities of the roll-pitch seeker. This paper presents a combined non-singular fast terminal sliding mode control method, aimed at resolving the frame control problem of roll-pitch seeker tracking high maneu-vering target. The sliding mode surface is structured around the principle of segmentation, which enables the control system’s rapid attainment of the zero point and ensure global fast conver-gence. The system’s state is more swiftly converged to the slid-ing mode surface through an improved adaptive fast dual power reaching law. Utilizing an extended state observer, the overall disturbance is both identified and compensated. The validation of the system’s stability and its convergence within a finite-time is grounded in Lyapunov’s stability criteria. The performance of the introduced control method is confirmed through roll-pitch seeker tracking control simulation. Data analysis reveals that newly proposed control technique significantly outperforms existing sliding mode control methods by rapidly converging the frame to the target angle, reduce the tracking error of the detec-tor for the target, and bolster tracking precision of the roll-pitch seeker huring disturbed conditions. 展开更多
关键词 air-to-air missile roll-pitch seeker finite-time con-vergence combined sliding mode control extended state observer
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Investigation on hard-rock breaking performance and auxiliary mechanism of picks assisted with both-sided high-pressure water jets 认领 引用 被引量：1
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作者 Jingjing Lu Jiancheng Xiao +4 位作者 Hui Zhou Xiao Ma Congcong Hou Jian Cui Fujian Yang 《Deep Underground Science and Engineering》 EI CAS CSCD 2026年第2期581-596,共16页
Double-wheel trench cutters display reduced efficiency while cutting through hard or extremely hard rock strata,leading to significant wear on their picks.A highpressure water jet-pick combined rock-breaking method(HP... Double-wheel trench cutters display reduced efficiency while cutting through hard or extremely hard rock strata,leading to significant wear on their picks.A highpressure water jet-pick combined rock-breaking method(HPC)for double-wheel trench cutters is proposed,addressing the challenges of low efficiency and high pick wear when cutting hard rock strata.The HPC mode integrates high-pressure water jets to precut grooves on both sides of the picks,creating free surfaces that facilitate rock fragmentation.Experiments were conducted with the combination of high-pressure water jet cutting and linear pick cutting under the HPC mode with granite.The HPC rock-breaking efficiency was compared with that of conventional pick-relieved cutting(PRC)and pick-unrelieved cutting(PUC)modes.A numerical model based on the continuum-discontinuum element method was developed to investigate the rock-breaking mechanism with water jet assistance.The mechanism of rock breaking by pick with bilateral water jet assistance has been revealed.The main conclusions are as follows:(1)The HPC mode reduced the average horizontal and normal rock-breaking forces by 36.02%and 48.78%,respectively,compared with PRC,and by 32.07%and 42.85%,respectively,compared with PUC.Furthermore,compared with the PRC and PUC modes,the HPC mode decreased specific energy consumption by 88.58%and 93.84%and increased the coarseness index of rock debris by 159.28%and 189.77%,respectively.These improvements indicate a transition from localized fragmentation to large-chunk stripping during rock breaking,attributed to the free surfaces created by water jet grooving.(2)The free surfaces created by the water jet altered the rock mass displacement vector from radial to horizontal,promoting the formation of Λ-shaped fractures and increasing tensile and tensileshear fractures.This mechanism reduced the intermediate principal stress and strain energy within the rock mass,reducing the difficulty of rock breaking.The HPC mode thus offers a promising solution for improving the efficiency of double-wheel trench cutters in hard rock excavation,with the potential for broader application in underground diaphragm wall construction. 展开更多
关键词 combined rock-breaking mode double-wheel trench cutter rock-breaking technology underground diaphragm wall construction
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Research on the path of medical service combination from the perspective of departmental cooperation 认领 引用
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作者 YANG Huazhen 《International English Education Research》 2018年第3期59-61,共3页
As an innovative mode of social endowment, combining medical care with modern medical care technology and old-age service is an important direction of a series of social problems caused by the deepening of aging and t... As an innovative mode of social endowment, combining medical care with modern medical care technology and old-age service is an important direction of a series of social problems caused by the deepening of aging and the intensification of aging process in China. It is the inevitable choice for the development of Chinese characteristics for the aged. At present, with the continuous development of the combination of medical care and rehabilitation, the process of combination of medical care and breeding is slow, and the problems of inter departmental cooperation, high cost of resource integration and low service efficiency have emerged. The paper puts forward that multi head management of different responsibility management body is a bottleneck problem that hinders the integration of medical care. From the objective and subjective two points of view, the administrative system level barrier and the inter departmental interest game are the important reasons that obstruct the medical support and break through the estrangement of the Department and realize the cooperation. Then, according to the theory of large part system reform, the author boldly proposes the idea of establishing a new comprehensive functional department that specializes in the management of pension related affairs. 展开更多
关键词 medical service combination new pension service mode department cooperation bottleneck problem
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Research on the Application of Appropriate Technology of Traditional Chinese Medicine in the Mode of Combining Medical Care with Nursing Care for the Aged 认领 引用
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作者 HUYalan LUSijie 《外文科技期刊数据库（文摘版）医药卫生》 2022年第5期180-184,共5页
With the aggravation of the aging population in China, the number of the elderly is increasing year by year due to the negative growth of the population. Healthy old-age care has become a realistic social problem, whi... With the aggravation of the aging population in China, the number of the elderly is increasing year by year due to the negative growth of the population. Healthy old-age care has become a realistic social problem, which needs to be solved urgently. At present, the mode of combining medical care with nursing care is being gradually implemented and applied all over the world. With its traditional Chinese medicine therapy, convenient and simple operation, safe and no side effects, the appropriate technology of traditional Chinese medicine gives full play to the unique advantages of Chinese medicine, and its application in the mode of combining medical care with nursing care can provide reference for the elderly. Based on this, this paper analyzes and studies the application of appropriate technology of traditional Chinese medicine in the mode of combining medical care with nursing care for the aged. 展开更多
关键词 appropriate technology of traditional Chinese medicine combination of medical care and nutrition pension mode application research
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冲击载荷下含瓦斯煤岩组合体动力学行为及破坏特征分析 认领 引用 被引量：2
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作者 王登科 董博文 +12 位作者 邓军 李文睿 曹塘根 雷东记 樊世星 康付如 寇康康 卫彦昭 夏缘帝 夏玉玲 张力元 滑俊杰 吴建宇 《煤炭学报》 EI CAS CSCD 北大核心 2026年第4期2502-2516,共15页
为探究冲击载荷作用下含瓦斯煤岩组合体的动力学行为与破坏特征,利用含瓦斯煤岩冲击损伤-渗流试验系统和工业显微CT扫描系统,设计并开展了三轴动态压缩试验。通过试验重构了煤岩组合体在动态加载前后的三维裂隙结构,对比分析了不同CO_(2... 为探究冲击载荷作用下含瓦斯煤岩组合体的动力学行为与破坏特征,利用含瓦斯煤岩冲击损伤-渗流试验系统和工业显微CT扫描系统,设计并开展了三轴动态压缩试验。通过试验重构了煤岩组合体在动态加载前后的三维裂隙结构,对比分析了不同CO2气体压力下煤岩组合体的动态应力-应变曲线、力学参数、能量耗散规律、裂隙扩展规律和冲击破坏特征。结果表明:在冲击载荷作用下,煤岩组合体的应力-应变曲线可分为初始变形阶段、煤控弹性阶段、过渡阶段、岩控弹性阶段、应变硬化阶段和宏观破坏阶段。随着CO2气体压力的增加,煤岩组合体的动态抗压强度逐渐降低,动态峰值应变和应变率呈指数下降趋势。煤岩组合体的第一弹性模量随CO2气体压力增加先增大后减小,第二弹性模量则在一定范围内波动变化。在冲击载荷作用下,煤岩组合体的入射能>吸收能>反射能>透射能。随着CO2气体压力的增加,4种能量均呈现出逐渐减小的趋势,但各能量成分所占比例基本保持不变。CO2气体压力的增加导致其对煤体的劣化作用增强,从而使组合体内部裂隙体积和裂隙表面积增加。随着CO2气体压力增大,煤岩组合体的轴向切片上的剪切裂隙与张拉裂隙面积均有所增加。煤岩组合体的主要破坏形式是压剪破坏,破坏多出现在煤体部分,而岩体部分的破坏形式往往受到煤体影响。 展开更多
关键词 含瓦斯煤岩组合体 应力-应变曲线 能量转换 裂隙的扩展 破坏形式
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Ultimate Bearing Characteristics Analysis of a Novel Anchor Structure for Floating Offshore Wind Turbine under Mooring Line Failure Conditions 认领 引用
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作者 Conghuan Le Xinting Zheng +2 位作者 Siteng Ma Puyang Zhang Hongyan Ding 《哈尔滨工程大学学报（英文版）》 CSCD 2026年第2期550-560,共11页
This paper introduces a novel three-anchor combined suction anchor(TACSA)structure and evaluates the ultimate bearing characteristics of two mooring types under mooring line failure scenarios:single-primary-anchor moo... This paper introduces a novel three-anchor combined suction anchor(TACSA)structure and evaluates the ultimate bearing characteristics of two mooring types under mooring line failure scenarios:single-primary-anchor mooring(SPAM)and dual-primary-anchor mooring(DPAM).Utilizing the finite element software ABAQUS,the ultimate bearing capacity and failure mode of the anchor were analyzed under the mooring line failure conditions.The findings indicate that with an increase in the deflection angle,the bearing capacity of the anchor experiences a gradual decline.A comparison of the two types of mooring revealed that DPAM resulted in a reduced descending speed of the bearing capacity and a smaller deflection angle of the anchor compared to the SPAM.In the SPAM system,the occurrence of linear plastic damage is contingent upon the attainment of a deflection angle of 45°.In the DPAM system,such damage manifests when the deflection angle exceeds 60°.These findings suggest that the synergistic effect between the anchors and the soil is enhanced in the DPAM system.Consequently,DPAM system demonstrates superior ultimate bearing characteristics and a reduced rotation degree,rendering it more effective in resisting the torque load induced by the deflection angle compared to SPAM system. 展开更多
关键词 Offshore wind power Bearing capacity Failure modes Three-anchor combined suction anchor Mooring types
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基于RIME-VMD联合小波阈值的爆破振动信号去噪方法 认领 引用 被引量：2
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作者 王薇 程忠耀 +1 位作者 向延念 宋良俊 《铁道科学与工程学报》 EI CAS CSCD 北大核心 2026年第1期465-479,共15页
随着现代化建设的加速推进,邻近既有建筑的爆破作业日益增多,监测和分析爆破引起的振动对结构安全的评估至关重要。然而,爆破振动信号的非线性特性和复杂的环境因素干扰使得从实测信号中提取有效信号成分难度较大,给后续的信号分析造成... 随着现代化建设的加速推进,邻近既有建筑的爆破作业日益增多,监测和分析爆破引起的振动对结构安全的评估至关重要。然而,爆破振动信号的非线性特性和复杂的环境因素干扰使得从实测信号中提取有效信号成分难度较大,给后续的信号分析造成了较大影响。为提高爆破振动信号的降噪精度,将雾凇优化算法(RIME)、变分模态分解(VMD)和小波阈值进行融合,形成一种爆破振动信号联合去噪方法。该方法首先通过雾凇优化算法对VMD关键参数进行优化,然后通过优化后的VMD对振动信号进行自适应分解,剔除方差贡献率较低的分量,再采用小波阈值对筛选后的分量进行降噪处理,最终重构得到去噪后的信号。对该方法的降噪效果进行仿真分析和实际工程验证,结果表明:在仿真信号分析中,经RIME-VMD联合小波阈值的降噪方法去噪后的信号与无噪声的纯净信号相比,形状与特征高度吻合,且信噪比(SNR)和均方根误差(RMSE)等去噪指标优于EMD、小波阈值、EMD联合小波阈值等常用去噪方法;经工程实际案例验证,该方法能够在极大保留原信号基本特征的前提下,有效去除爆破振动信号中的高频噪声,降噪后信号更加符合爆破振动信号的主频范围,且具有比EMD、小波阈值、EMD联合小波阈值等常用去噪方法更好的去噪效果。该研究成果对爆破振动信号的降噪处理具有参考意义。 展开更多
关键词 爆破振动 信号处理 联合降噪 雾凇优化算法 变分模态分解 小波阈值去噪
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基于改进变模态分解和宽核深度卷积神经网络的中介轴承故障诊断方法 认领 引用 被引量：1
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作者 田晶 谢肇阳 +1 位作者 吕静宜 林政 《推进技术》 EI CAS CSCD 北大核心 2026年第1期309-320,共12页
针对中介轴承受背景噪声干扰导致故障特征提取困难且诊断识别率低的问题,提出一种基于河马算法(Hippopotamus Optimization Algorithm,HO)改进变模态分解(Variational Mode Decomposition,VMD)、并结合第一层宽卷积核深度卷积神经网络(D... 针对中介轴承受背景噪声干扰导致故障特征提取困难且诊断识别率低的问题,提出一种基于河马算法(Hippopotamus Optimization Algorithm,HO)改进变模态分解(Variational Mode Decomposition,VMD)、并结合第一层宽卷积核深度卷积神经网络(Deep Convolutional Neural Networks with Wide First-layer Kernel,WDCNN)的故障诊断方法。该方法首先综合包络谱能量、峭度和排列熵构建多维度联合指标作为适应度函数,通过河马算法寻优确定VMD关键变量参数,其次,将原始信号分解后,根据相关系数-样本熵准则筛选有效模态分量进行重构,最后,将重构信号作为样本输入WDCNN模型完成故障诊断。凯斯西储大学轴承数据集试验结果表明:重构信号多次诊断的准确率为98.30%,相较于支持向量机、反向传播神经网络与一维卷积神经网络诊断有更高的正确率;对于自建中介轴承故障模拟试验台数据的多次诊断的平均准确率为96.4%,多种分类方法准确率平均优化了18.9%,稳定性优化了52%。证明该提方法能够去除噪声等非线性干扰成分,有效提升故障诊断模型分类准确性。 展开更多
关键词 中介轴承 多维度联合函数 河马算法 变模态分解 第一层宽卷积核深度卷积神经网络
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基于互补性的专利许可模式选择与组合策略研究 认领 引用
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作者 乔永忠 赖护鑫 《科学管理研究》 CSSCI 北大核心 2026年第3期22-32,共11页
构建以许可互补性为核心的专利运用模式,对优化企业专利运用策略与风险防控非常重要。该模式从权利支配强度、技术扩散广度、协同耦合程度及许可治理效率解构专利许可行为。普通许可、排他许可、独占许可、交叉许可及专利池许可与开放... 构建以许可互补性为核心的专利运用模式,对优化企业专利运用策略与风险防控非常重要。该模式从权利支配强度、技术扩散广度、协同耦合程度及许可治理效率解构专利许可行为。普通许可、排他许可、独占许可、交叉许可及专利池许可与开放许可被分别定位为“分散流通的债权管道”“排他权的有限让渡”“排他权的完全让渡”“风险对冲的互易契约”“集体治理的集成平台”“程序简化的公共要约”的专利运用方式。通过必要型、从属型、替代型与协同型模式,揭示基于技术不可或缺性与法律独立性的动态关系,反映从绝对排他到开放共享的专利连续策略。该思路以企业异质性为基础,基于技术资产法律属性、市场地位与生态位诉求的精密权利配置分析专利许可组合的优势。提出企业应该协同动态流程、反垄断合规与组织能力,运用技术驱动型“杠杆式”、市场主导型“核心-外围”、生态构建型“开放-增值”等差异化策略,在复杂环境中将互补性法理认知转化为可持续竞争优势与合规价值的观点。 展开更多
关键词 专利许可 互补性 模式选择 组合策略
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蛋白质-EGCG复合物体外活性和结构稳定性的相关性研究 认领 引用
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作者 康晶晶 杨美花 +2 位作者 陈慧芳 陈晨 殷明月 《食品工业科技》 EI CAS 北大核心 2026年第10期98-106,共9页
本文以蛋白质(大豆分离蛋白、酪蛋白、鸡蛋清白蛋白和β-乳球蛋白)和表没食子儿茶素没食子酸酯(Epigallocatechin gallate,EGCG)为原料,分别采用混合搅拌、偶联、羟自由基和酶促反应的方法,制备出1种蛋白质-EGCG非共价物和3种共价物。以... 本文以蛋白质(大豆分离蛋白、酪蛋白、鸡蛋清白蛋白和β-乳球蛋白)和表没食子儿茶素没食子酸酯(Epigallocatechin gallate,EGCG)为原料,分别采用混合搅拌、偶联、羟自由基和酶促反应的方法,制备出1种蛋白质-EGCG非共价物和3种共价物。以EGCG结合率、体外抗氧化和衰老酶抑制率等为评价指标,探讨蛋白种类和结合方式对蛋白质-EGCG复合物结构和体外活性的影响,构建蛋白质-EGCG共价物消化过程中体外活性和结构稳定性的相关性。结果显示,蛋白质-EGCG复合作用可增加EGCG的自由基(DPPH·和OH·)清除能力和衰老酶(酪氨酸酶和弹性蛋白酶)抑制作用,具体效果因蛋白质种类和结合方式而不同;酪蛋白-EGCG复合物结合EGCG量最高(0.175~0.225 mg/mg Pro),但其体外活性却整体上弱于同结合模式下的大豆分离蛋白-EGCG复合物;羟自由基共价反应能显著增加蛋白质-EGCG非共价物的体外活性,使其DPPH·清除率和酪氨酸酶抑制率分别提升了86.73%和49.12%以上,而酶促反应和偶联反应却起到相反的作用。蛋白质-EGCG复合物体外活性与其EGCG结合量无显著关系,大豆分离蛋白-EGCG羟自由基共价物的差消化稳定性(EGCG结合量为0.06~0.15 mg/mg Pro)和优越的体外抗氧化活性一定程度上证实了体外活性与结构稳定性的反相关性。 展开更多
关键词 蛋白质-EGCG复合物 结合方式 蛋白质种类 抗氧化活性 抗衰老活性 相关性研究
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