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A HYBRID GRANULARITY PARALLEL ALGORITHM FOR PRECISE INTEGRATION OF STRUCTURAL DYNAMIC RESPONSES 认领 引用
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作者 Yuanyin Li Xianlong Jin Genguo Li 《Acta Mechanica Solida Sinica》 SCIE EI 2008年第1期28-33,共6页
Precise integration methods to solve structural dynamic responses and the corresponding time integration formula are composed of two parts： the multiplication of an exponential matrix with a vector and the integratio... Precise integration methods to solve structural dynamic responses and the corresponding time integration formula are composed of two parts： the multiplication of an exponential matrix with a vector and the integration term. The second term can be solved by the series solution. Two hybrid granularity parallel algorithms are designed, that is, the exponential matrix and the first term are computed by the fine-grained parallel algorithra and the second term is computed by the coarse-grained parallel algorithm. Numerical examples show that these two hybrid granularity parallel algorithms obtain higher speedup and parallel efficiency than two existing parallel algorithms. 展开更多
关键词 dynamic response precise integration hybrid granularity parallel algorithm
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Simulated photo-degradation of dissolved organic matter in lakes revealed by three-dimensional excitation-emission matrix with regional integration and parallel factor analysis 认领 引用 被引量：6
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作者 Jin Zhang Fanhao Song +5 位作者 Tingting Li Kefu Xie Huiying Yao Baoshan Xing Zhongyu Li Yingchen Bai 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2020年第4期310-320,共11页
Simulated photo-degradation of fluorescent dissolved organic matter(FDOM) in Lake Baihua(BH) and Lake Hongfeng(HF) was investigated with three-dimensional excitationemission matrix(3 DEEM) fluorescence combined with t... Simulated photo-degradation of fluorescent dissolved organic matter(FDOM) in Lake Baihua(BH) and Lake Hongfeng(HF) was investigated with three-dimensional excitationemission matrix(3 DEEM) fluorescence combined with the fluorescence regional integration(FRI),parallel factor(PARAFAC) analysis,and multi-order kinetic models.In the FRI analysis,fulvic-like and humic-like materials were the main constituents for both BH-FDOM and HF-FDOM.Four individual components were identified by use of PARAFAC analysis as humic-like components(C1),fulvic-like components(C2),protein-like components(C3) and unidentified components(C4).The maximum 3 DEEM fluorescence intensity of PARAFAC components C1-C3 decreased by about 60%,70% and 90%,respectively after photo-degradation.The multi-order kinetic model was acceptable to represent the photo-degradation of FDOM with correlation coefficient(Radj2)(0.963-0.998).The photo-degradation rate constants(kn) showed differences of three orders of magnitude,from 1.09 × 10-6 to 4.02 × 10-4 min-1,and half-life of multi-order model(T1/2n)ranged from 5.26 to 64.01 min.The decreased values of fluorescence index(FI) and biogenic index(BI),the fact that of percent fluorescence response parameter of Region I(PⅠ,n) showed the greatest change ratio,followed by percent fluorescence response parameter of Region II(PⅡ,n,while the largest decrease ratio was found for C3 components,and the lowest T1/2n was observed for C3,indicated preferential degradation of protein-like materials/components derived from biological sources during photodegradation.This research on the degradation of FDOM by 3 DEEM/FRI-PARAFAC would be beneficial to understanding the photo-degradation of FD OM in natural environments and accurately predicting the environmental behaviors of contaminants in the presence of FDOM. 展开更多
关键词 Fluorescent dissolved organic matter Photo-degradation Fluorescence regional integration Parallel factor analysis Three-dimensional excitationemission matrix Multi-order kinetic models
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PARALLEL INFORMATION-BASED COMPLEXITY OF NUMERICAL INTEGRATION ON SOBOLEV CLASS W_q^s(Ω) 认领 引用
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作者 Jiang Tianzi 《Analysis in Theory and Applications》 1996年第1期10-18,共9页
This paper deals with the parallel information-based complexity of numerical integration on Sobolev class. We obtain tight bounds on the complexity, considered as a function of two variables simultaneously:the number ... This paper deals with the parallel information-based complexity of numerical integration on Sobolev class. We obtain tight bounds on the complexity, considered as a function of two variables simultaneously:the number of processors, the rquired precision. This result seems to be new even in serial case. 展开更多
关键词 PARALLEL INFORMATION-BASED COMPLEXITY OF NUMERICAL INTEGRATION ON SOBOLEV CLASS W_q~s
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Dual-wavelength coherent beam combination and wide-angle beam steering via integrated optical phased arrays 认领 引用
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作者 Xiaobin Wang Yuqiu Zhang +9 位作者 Qiyu Wang Xu Zhao Jingye Chen Hongxiang Chang Zhongquan Nie Jinhai Zou Jian Wu Jinyong leng Pu Zhou Xiang’e Han 《Advanced Photonics Nexus》 CSCD 2026年第4期248-258,共11页
Integrated optical phased arrays(OPAs),owing to their high integration level and wide-angle beamsteering capability,are a key promising component for 3D/4D sensing and free-space optical communication.However,integrat... Integrated optical phased arrays(OPAs),owing to their high integration level and wide-angle beamsteering capability,are a key promising component for 3D/4D sensing and free-space optical communication.However,integrated OPAs typically employ a single-wavelength laser as the input light source,which limits their application in spectral imaging and secure communication.In this work,we propose and experimentally demonstrate a dual-wavelength coherent beam combining(CBC)scheme using a 64-element integrated OPA.A multiwavelength CBC model is established and validated with two wavelength pairs(1545/1555 and 1535∕1565 nm).Both simulation and experimental results confirm that the beam dispersion intensifies with the steering angle and wavelength separation.To overcome this inherent dispersion issue,we employ a stochastic parallel gradient descent algorithm with two avalanche photodiodes as feedback sensors,achieving an arbitrarily configurable angular separation between the two wavelength beams.Finally,we demonstrate the wide field of view beam-steering capability of the combined beam across a 60 deg(±30 deg)range.We provide a foundational framework for advancing multiwavelength OPA toward applications in spectral imaging and secure optical communications. 展开更多
关键词 integrated optical phased arrays coherent beam combination dual-wavelength stochastic parallel gradient descent algorithm
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Studies on parallel seismic testing for integrity of cemented soil columns 认领 引用 被引量：4
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作者 HUANG Da-zhi CHEN Long-zhu 《Journal of Zhejiang University-SCIENCE A》 SCIE EI CAS 2007年第11期1746-1753,共8页
The principle and process of parallel seismic (PS) testing for the integrity testing of cemented soil columns are in- troduced in this paper. A three-dimensional (3D) finite element model (FEM) for the pile-soil syste... The principle and process of parallel seismic (PS) testing for the integrity testing of cemented soil columns are in- troduced in this paper. A three-dimensional (3D) finite element model (FEM) for the pile-soil system is established for impulse responses. Under saturated soil or unsaturated soil condition, several vibrating velocity-time histories at different depths in parallel hole are obtained based on the numerical simulation. It shows that the length of the pile and the one-dimensional (1D) P-wave velocity in the pile can be determined easily from the features of the mentioned velocity-time histories. By examining the slopes of the first arrival time plotted versus depth or the depth where the amplitude of the first arrival significantly decreases, the length of the pile can be determined. The effects of the 3D P-wave propagation through the saturated soil and the defect of the cemented soil column on the velocity-time histories are also investigated. 展开更多
关键词 Parallel seismic （PS） testing Cemented soil columns Integrity testing Numerical simulation
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APPLICATION OF THE HYPERSINGULAR INTEGRAL EQUATIONS METHOD TO THE INTERACTION BETWEEN TWO PARALLEL PLANAR CRACKS IN 3-D ELASTICITY 认领 引用 被引量：1
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作者 Qin Taiyan, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, P. R. ChinaYue Jinchao Tang Renji, Dept. of Engineering Mechanics, Shanghai Jiaotong University, Shanghai 200030, P. R. China 《Acta Mechanica Solida Sinica》 SCIE 1995年第1期64-74,共11页
By using the analytic theory of hypersingular integral equations in three- dimensional fracture mechanics, the interactions between two parallel planar cracks under arbitrary loads are investigated. According to the c... By using the analytic theory of hypersingular integral equations in three- dimensional fracture mechanics, the interactions between two parallel planar cracks under arbitrary loads are investigated. According to the concepts and method of finite- part integrals, a set of hypersingular integral equations is derived, in which the unknown functions are the displacement discontinuities of the crack surfaces. Then its numerical method is proposed by combining the finite-part integral method with the boundary element method. Based on the above results, the method for calculating the stress intensity factors with the displacement discontinuities of the crack surfaces is presented. Finally, several typical examples are calculated and the numerical results are satisfactory. 展开更多
关键词 interaction hypersingular integral equation two parallel planar cracks stress intensity factor
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Design of a Novel Macro-Micro Integrated Brain Surgery Robot Based on Modular Parallel Mechanisms 认领 引用 被引量：2
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作者 Hao Zheng Chenbo Liang +4 位作者 Feng Gao Chenkun Qi Bingze He Renqiang Liu Longhai Chen 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2024年第5期349-364,共16页
The advancement and development of medical surgical robots have provided new technological support for brain surgery and neurosurgical procedures,improving the reliability of highly complex and precise surgeries.In tu... The advancement and development of medical surgical robots have provided new technological support for brain surgery and neurosurgical procedures,improving the reliability of highly complex and precise surgeries.In turn,this urges the design and development of novel surgical robots to possess higher precision,stability,and enhanced motion capabilities.In response to this practical demand,this paper introduces a macro-micro integrated medical brain surgery robot system based on the concept of modular PMs(parallel mechanisms),which have a total of 13 active DOFs(degrees of freedom).This system divides the motion process of brain surgery into a large-scale macro-motion space and a small-scale high-precision motion space for design and planning control.The introduction of the design concept that combines multiple modular parallel sub-mechanisms has brought a significant level of decoupling characteristics to the mechanism itself.A comprehensive introduction and analysis of the surgical robot are provided,covering aspects such as design,kinematics,motion planning,and performance indicators.To address the pose allocation and coordination of motion between the macro platform and the micro platform,a pose allocation algorithm based on the decoupling and non-decoupling characteristics in various dimensions of the macro-micro platform is proposed.The designed measurement experiments have demonstrated that the repeatability in positioning accuracy of the macro and micro platform reaches the level of micron and submicron respectively.Practical experiments of motion control and simulated brain electrode implantation validate the excellent performance and stability of the entire surgical robot system.This research contributes innovative insights to the development of medical surgical robot systems,particularly in the domain of mechanism design. 展开更多
关键词 Medical surgical robot Macro-micro integrated system Modular parallel mechanism High-precision robot
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Parallel Integrated Model-Driven and Data-Driven Online Transient Stability Assessment Method for Power System 认领 引用 被引量：1
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作者 Ying Zhang Xiaoqing Han +3 位作者 Chao Zhang Ying Qu Yang Liu Gengwu Zhang 《Energy Engineering》 EI 2023年第11期2585-2609,共25页
More and more uncertain factors in power systems and more and more complex operation modes of power systems put forward higher requirements for online transient stability assessment methods.The traditional modeldriven... More and more uncertain factors in power systems and more and more complex operation modes of power systems put forward higher requirements for online transient stability assessment methods.The traditional modeldriven methods have clear physical mechanisms and reliable evaluation results but the calculation process is time-consuming,while the data-driven methods have the strong fitting ability and fast calculation speed but the evaluation results lack interpretation.Therefore,it is a future development trend of transient stability assessment methods to combine these two kinds of methods.In this paper,the rate of change of the kinetic energy method is used to calculate the transient stability in the model-driven stage,and the support vector machine and extreme learning machine with different internal principles are respectively used to predict the transient stability in the data-driven stage.In order to quantify the credibility level of the data-driven methods,the credibility index of the output results is proposed.Then the switching function controlling whether the rate of change of the kinetic energy method is activated or not is established based on this index.Thus,a newparallel integratedmodel-driven and datadriven online transient stability assessment method is proposed.The accuracy,efficiency,and adaptability of the proposed method are verified by numerical examples. 展开更多
关键词 Rate of change of kinetic energy support vectormachine extreme learning machine credibility index model-data parallel integration
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Parallel Reservoir Integrated Simulation Platform for One Million Grid Blocks Cases 认领 引用 被引量：1
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作者 Feng Pan Jianwen Cao 《通讯和计算机（中英文版）》 2005年第11期29-33,42,共5页
This paper first provides a brief introduction to a numerical reservoir simulation and a parallel numerical reservoir integrated simulation platform developed by RDCPS （Research ＆ Development Center for Parallel Sof... This paper first provides a brief introduction to a numerical reservoir simulation and a parallel numerical reservoir integrated simulation platform developed by RDCPS （Research ＆ Development Center for Parallel Software, Institute of Software, Chinese Academy of Sciences）, which includes Pre-Processing, Simulator （for a Three-Dimensional ＆ Three-Phase Black-Oil models）, Post Processing, seamlessly integrated with parallel computers. We then present key technologies of the simulator, such as nonlinear and linear solvers, communications among processors, parallel I/O, etc., and corresponding content. Finally, some results of the platform to solve one million grid blocks cases from Chinese oil fields are given in the paper, which can show that the simulator has a very robust portability, high-speed for deadline and good scalability for the tested cases. As one of the application softwares, its objective is always focusing on satisfying deadlines of oil industry. Now, for one million grid blocks＇ case with 20 - 30 year-production, its elapsed time with 16 processors is less than 12 hours on parallel computers based on Myrinet or QsNet, namely ＇to submit a case just before off-duty and get its result just before on-duty＇. A decreasing line of elapsed time is given for a case with one million grid blocks. The developing trace of the simulator along with parallel computers can be also inferred from the line. 展开更多
关键词 Parallel Numerical Reservoir Simulation Fine Residual-oil Distribution One Million Grid Blocks Problem Integrated Simulation Platform Parallel Computer Deadline Grid Computing
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露天矿卡平行自主运输系统研究 认领 引用 被引量：2
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作者 郭伦锋 郭一楠 +3 位作者 葛世荣 杨健健 纪佩瑶 王杰 《工矿自动化》 CSCD 北大核心 2026年第3期1-14,143,共14页
露天矿运输系统具有设备多样、作业点分布、作业流程时空耦合、环境动态变化等特性,导致其高效管理与控制存在挑战。此外,极端工况下系统测试困难及特定场景的感知数据不足,使系统性能难以全面评估,导致决策与控制策略对场景的适应性差... 露天矿运输系统具有设备多样、作业点分布、作业流程时空耦合、环境动态变化等特性,导致其高效管理与控制存在挑战。此外,极端工况下系统测试困难及特定场景的感知数据不足,使系统性能难以全面评估,导致决策与控制策略对场景的适应性差,泛化能力弱,运行稳定性与安全性难以保障,从而影响系统整体可靠性。针对上述问题,提出一种基于平行理论与车路云融合控制理念的露天矿平行自主运输系统。该系统由物理系统、工业互联网和人工系统3个部分构成。其中,人工系统采用边缘云、矿山云和中心云三级云控架构,通过云控基础平台与云控应用平台实现多层级协同控制。云控基础平台是云计算中心,可保障各级云控应用对实时性与服务范围的多样化需求。云控应用平台包括资源库及面向生成场景的平行学习与平行协同。资源库由模型库和算法库构成,实现建模方法选取和场景定义,为算法训练与协同控制提供方法支撑。平行学习通过虚实结合的平行训练与平行测试,构建人工系统和实际运输系统之间的数据闭环,从而解决算法数据不足和极端场景测试困难问题,推动系统自演化。平行协同基于三级云控架构与多智能体技术,实现协同感知、态势预测和分层分布式协同控制,有效应对多设备协同管理复杂与实时控制难题。实例分析结果表明,平行训练方法不仅有效减少了数据采集和标注的工作量,同时也显著提高了目标检测模型的精度和鲁棒性。 展开更多
关键词 露天矿 自主运输 平行训练与测试 虚实结合 多智能体 平行学习 平行协同
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新工科背景下智能机器人课程教学改革研究与实践 认领 引用 被引量：4
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作者 周亦威 王子元 樊重俊 《高教学刊》 2026年第2期5-8,共4页
新工科背景下,智能机器人课程由于涉及硬件具有很强的实践性特点,传统的理论课程教学方式难以满足实践需求。该文基于上海理工大学人工智能专业智能机器人课程教学的实际情况,提出“理论+实践并行”的课程教学模式,将理论教学和实验教... 新工科背景下,智能机器人课程由于涉及硬件具有很强的实践性特点,传统的理论课程教学方式难以满足实践需求。该文基于上海理工大学人工智能专业智能机器人课程教学的实际情况,提出“理论+实践并行”的课程教学模式,将理论教学和实验教学同步并行,并采用“理论—仿真—实验”一体化教学,实现理论教学与动手实践相辅相成,进一步加深学生对理论知识的理解,培养学生的动手操作能力和团队协作精神,从而为促进智能机器人教学和新工科人才培养提供借鉴。 展开更多
关键词 新工科 智能机器人 教学改革 理论实践并行 一体化教学
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从“五育并举”到“五育融合”:高校体育综合育人思想嬗变与实践探索——以华中师范大学为例 认领 引用 被引量：6
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作者 夏贵霞 郭宝科 舒宗礼 《体育学刊》 CAS CSSCI 北大核心 2026年第1期104-112,共9页
以“五育并举”“五育融合”为标识的中国教育学知识体系正加速建构。从“五育并举”到“五育融合”的嬗变,是教育的理论逻辑与实践逻辑相互融合的过程,是新时代中国教育变革与发展的基本趋势,这对高校体育发挥“树德、益智、强身、涵... 以“五育并举”“五育融合”为标识的中国教育学知识体系正加速建构。从“五育并举”到“五育融合”的嬗变,是教育的理论逻辑与实践逻辑相互融合的过程,是新时代中国教育变革与发展的基本趋势,这对高校体育发挥“树德、益智、强身、涵美、促劳”的综合育人效益提出新要求、提供新契机。近些年,华中师范大学弘扬“求实创新、立德树人”的校训文化和“体为国本、育人最先”的体育理念,持续推进以体育为突破口,通过构建“五育融合”体育课程教学模式,强化沉浸式体育文化育人,实施“以赛育人”共同体计划、成立大学生体育(健康)教育中心等政策举措,构建并实施“五育融合”实践育人体系,彰显出高校体育在培养德智体美劳全面发展的社会主义建设者和接班人中的重要价值。展望未来,高校体育既要在“五育融合”实践育人体系中充分发挥其独特的育人作用,也要构建以“五育融合”为基础的体育统整化知识体系,还要开创智能时代体育综合育人新场景、新生态和新模式。 展开更多
关键词 高校体育 五育并举 五育融合 综合育人 立德树人 智能时代
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一种综合性能优化的两电平并联类交错一体化空间矢量调制策略 认领 引用 被引量：1
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作者 杜燕 梁晶 +2 位作者 蔡志成 杨向真 苏建徽 《电工技术学报》 EI CSCD 北大核心 2026年第2期622-634,共13页
交错并联逆变器可抵消输出纹波,改善并网电流总谐波畸变率(THD),但可能导致共模和零序环流增大。针对此问题,该文提出一种双机并联逆变器的类交错一体化空间矢量调制(SISVM)策略,旨在实现系统的共模电压、零序环流、输出电流纹波以及开... 交错并联逆变器可抵消输出纹波,改善并网电流总谐波畸变率(THD),但可能导致共模和零序环流增大。针对此问题,该文提出一种双机并联逆变器的类交错一体化空间矢量调制(SISVM)策略,旨在实现系统的共模电压、零序环流、输出电流纹波以及开关损耗的综合优化。该文建立两电平并联逆变器的等效三电平模型,并以共模、环流、开关次数为约束条件筛选等效三电平矢量,并通过两电平载波移相实现类三电平调制。对比分析SISVM的输出电流纹波和环流特性,说明了与三电平空间矢量调制(TLSVM)相比,该调制策略可进一步减小零序环流和开关损耗。最后,通过DSP+Starsim实验平台验证了该策略在零序环流和开关损耗方面的有效性。 展开更多
关键词 交错并联逆变器 共模电压 零序环流 输出电流纹波 开关损耗 类交错 一体化调制
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综合能源系统概率能量流的多胚解-多维全纯嵌入计算方法 认领 引用 被引量：2
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作者 李雪 李栋 +1 位作者 姜涛 李国庆 《中国电机工程学报》 EI CSCD 北大核心 2026年第7期2882-2899,I0020,共18页
多维全纯嵌入法(multi-dimensional holomorphic embedding method,MDHEM)是求解综合能源系统(integrated energy system,IES)能量流的新方法,该方法无需初值、无雅可比矩阵奇异,但在概率能量流计算时存在幂级数阶数高、计算量较大的难... 多维全纯嵌入法(multi-dimensional holomorphic embedding method,MDHEM)是求解综合能源系统(integrated energy system,IES)能量流的新方法,该方法无需初值、无雅可比矩阵奇异,但在概率能量流计算时存在幂级数阶数高、计算量较大的难题。为此,该文根据全纯嵌入理论的半解析解特性,提出一种IES概率能量流的多胚解-多维全纯嵌入计算方法(multi-germ solution and multidimensional holomorphic embedding method,MG-MDHEM)。该方法首先构建IES能量流的MDHEM模型;然后,将IES中多维随机输入变量的波动范围划分为多个子区间,在各子区间内设置物理胚解,递推各子区间内待求变量的低阶半解析解表达式;进一步,将蒙特卡洛模拟法抽样的样本预处理后代入所属子区间待求变量的低阶半解析解中,借助多元商差并行求解各样本的能量流结果,通过对能量流计算结果的统计分析获得IES能量流的概率分布特征;最后,通过E14-G6和E118-G20测试系统算例验证所提方法的准确性和有效性。 展开更多
关键词 综合能源系统 多胚解-多维全纯嵌入法 概率能量流 多元商差法并行计算 不确定性
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一种FPGA实现的并行总线星载执行终端 认领 引用 被引量：2
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作者 刘博 杨凯 +1 位作者 杜轶群 游红俊 《电讯技术》 北大核心 2026年第2期274-280,共7页
针对互联网卫星任务模块通用化、执行集成化、控制分布化、轻量化低功耗的要求,通过全面分析任务的研制需求和技术特点,设计了一种新型的分布式执行控制终端。采用并行总线系统架构,以层次化的控制方式实现不同执行终端功能模块的灵活接... 针对互联网卫星任务模块通用化、执行集成化、控制分布化、轻量化低功耗的要求,通过全面分析任务的研制需求和技术特点,设计了一种新型的分布式执行控制终端。采用并行总线系统架构,以层次化的控制方式实现不同执行终端功能模块的灵活接入,完成对星上平台各动作部组件动作的融合控制和调度,能够根据不同场景按需选装所需的功能单元。同时,引入IP核作为分布式系统节点间的通信桥梁,具备软件灵活定义的通信协议,可支持不同类型总线的信息传输。该方案相比传统的星载控制终端在重量上、功耗上分别缩减25%和53%,现场可编程门阵列(Field Programmable Gate Array,FPGA)芯片的使用量上减少了70%,能更好地满足航天器通用化、软件化、轻量化的发展趋势,对未来星上多系统融合的需求也具有实际意义。 展开更多
关键词 互联网卫星 执行终端 并行总线 IP核 多系统融合
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燃气轮机分布式集成仿真平台设计及开发 认领 引用
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作者 王志涛 董玉强 +3 位作者 尚超英 李铁磊 明亮 张靖凯 《热能动力工程》 CAS CSCD 北大核心 2026年第1期205-214,共10页
为实现燃气轮机多系统集成仿真,提高集成仿真计算效率与计算资源利用率,针对燃气轮机结构复杂、多学科多系统耦合的特点,设计并开发了燃气轮机分布式集成仿真平台。将并行计算技术和数据分发服务技术相结合,采用客户端-服务器架构,利用... 为实现燃气轮机多系统集成仿真,提高集成仿真计算效率与计算资源利用率,针对燃气轮机结构复杂、多学科多系统耦合的特点,设计并开发了燃气轮机分布式集成仿真平台。将并行计算技术和数据分发服务技术相结合,采用客户端-服务器架构,利用多台计算机对燃气轮机各系统仿真模型进行计算。以某型燃气轮机系统为例,对仿真平台功能进行验证。结果表明:设计开发的仿真平台能够实现燃气轮机多系统集成仿真,解决了单一计算机计算资源受限导致的效率低下的问题,并通过并行计算技术进一步优化了燃气轮机多系统集成的仿真效率。 展开更多
关键词 燃气轮机 分布式 集成仿真 平台开发 并行计算
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积分修正类轨道计算方法综述 认领 引用
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作者 王昌涛 代洪华 +3 位作者 董一超 石琳 杨文传 岳晓奎 《航空学报》 EI CAS CSCD 北大核心 2026年第5期217-237,共21页
针对航天器轨道的快速计算问题,综述了积分修正类轨道算法的相关研究。首先在统一的配点符号体系下系统介绍了不同的积分修正类算法,并进行了分类与对比;然后聚焦该类算法的大步长和并行计算优势,梳理了其在参数优化和并行加速方面的研... 针对航天器轨道的快速计算问题,综述了积分修正类轨道算法的相关研究。首先在统一的配点符号体系下系统介绍了不同的积分修正类算法,并进行了分类与对比;然后聚焦该类算法的大步长和并行计算优势,梳理了其在参数优化和并行加速方面的研究进展;而后在航天器轨道设计、高精度轨道递推和飞行器制导等典型应用中阐述了积分修正类算法的特有优势;最后,结合算法特点与轨道计算需求分析了未来发展趋势,提出了值得研究的方向。 展开更多
关键词 轨道快速计算 轨道递推 积分修正 参数优化 并行计算
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平行图像:从理论框架到多模态智能视觉应用 认领 引用
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作者 张慧 田永林 +3 位作者 王雨桐 苟超 李轩 王飞跃 《中国图象图形学报》 CSCD 北大核心 2026年第7期2358-2380,共23页
在深度学习推动下,视觉感知系统在智能驾驶、安防监控和医疗诊断等领域取得显著进展。然而,现实场景中数据分布的极度不均衡、长尾样本的稀缺性及高昂的人工标注成本,已成为制约模型性能与泛化能力的关键瓶颈。平行图像作为基于平行系... 在深度学习推动下,视觉感知系统在智能驾驶、安防监控和医疗诊断等领域取得显著进展。然而,现实场景中数据分布的极度不均衡、长尾样本的稀缺性及高昂的人工标注成本,已成为制约模型性能与泛化能力的关键瓶颈。平行图像作为基于平行系统理论发展而来的新型图像生成与建模方法体系,通过构建人工场景系统、开展计算实验推演及虚实平行执行,形成“建模—训练—反馈—优化”的闭环机制,为视觉感知系统提供了高质量、多样化、结构化的合成数据支撑。本文系统梳理了平行图像的理论基础与发展脉络,重点综述其在虚拟场景生成、多模态特征融合、虚实域迁移和异构知识驱动的平行推理等关键技术路径上的研究进展与应用探索。同时,结合当前生成式人工智能和大规模多模态基础模型的发展趋势,分析了平行图像在智能视觉系统演化中的融合潜力。最后,本文指出该领域面临的主要挑战,并对未来的研究方向和应用前景进行了展望。 展开更多
关键词 平行图像 生成式人工智能 虚实融合 场景生成 数字孪生
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一种面向单片三维集成电路层间通孔的并行测试方法 认领 引用
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作者 陈田 陈炜坤 +2 位作者 刘军 梁华国 鲁迎春 《电子与信息学报》 EI CAS CSCD 北大核心 2026年第6期2754-2764,共11页
在单片三维集成电路中,单片层间通孔(MIV)是实现垂直互连的关键结构,其制造缺陷会严重影响芯片可靠性。然而,面对MIV数量庞大、电气参数微小、故障类型多样的特点,实现高精度、低开销的测试是一个重要挑战。该文提出一种基于时间数字转... 在单片三维集成电路中,单片层间通孔(MIV)是实现垂直互连的关键结构,其制造缺陷会严重影响芯片可靠性。然而,面对MIV数量庞大、电气参数微小、故障类型多样的特点,实现高精度、低开销的测试是一个重要挑战。该文提出一种基于时间数字转换器(TDC)的MIV并行测试方法。通过行列分组将待测MIV构建成行或列的测试链,并通过数控延迟线(DCDL)来生成具有特定相位关系的测试激励信号。利用TDC测量电路的响应,并通过分析响应序列的规律性偏差,可以实现MIV硬故障和小延迟故障的测试。仿真结果表明,该方法在45 nm工艺下可检测阻值高于8.4 kW的开路故障,低于67 kW的泄漏故障以及低于32 kW的短路故障,而且测试结果在不同工艺-电压-温度(PVT)条件下保持稳定。与现有方案相比,该方法在检测精度、条件鲁棒性及硬件开销方面展现出更好的综合性能,为高密度M3D IC的MIV测试提供了一种有效解决方案。 展开更多
关键词 单片三维集成电路 单片层间通孔 时间数字转换器 并行测试 内建自测试
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大规模GNSS观测数据一体化预处理系统设计与实现 认领 引用
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作者 任营营 《计算机测量与控制》 2026年第3期208-215,共8页
针对全球GNSS观测数据规模持续增长及多源数据管理、质量控制和自动化处理的迫切需求,设计并实现了一种面向大规模GNSS观测数据的一体化预处理系统;该系统采用模块化分层架构,集成格式转换、数据编辑、质量检查、单点定位、结果可视化... 针对全球GNSS观测数据规模持续增长及多源数据管理、质量控制和自动化处理的迫切需求,设计并实现了一种面向大规模GNSS观测数据的一体化预处理系统;该系统采用模块化分层架构,集成格式转换、数据编辑、质量检查、单点定位、结果可视化及报告生成等功能,具有功能完备性、结果可靠性、输出多样性、高度自动化和高效并行化等显著技术特征;基于135个基站的观测数据进行性能测试,结果表明:在六核十二线程的硬件环境下,该系统可将数据处理耗时由98分钟缩短至约17分钟,效率提升约576.5%,当并行度设置接近CPU物理核心数时可获得最佳性能;该系统有效降低了大规模GNSS数据预处理的技术门槛,显著提升了处理效率和可靠性,为GNSS精密定位、误差建模及气象反演等应用提供了高效的数据支撑。 展开更多
关键词 GNSS RINEX 预处理 并行化 一体化
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