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A Fuzzy Neural Network Based Dynamic Data Allocation Model on Heterogeneous Multi-GPUs for Large-scale Computations

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International Journal of Automation and computing 2018年第2期15卷 181-193页

作者： Chao-Long Zhang Yuan-ping xu zhi-Jie xu Jia He Jing Wang Jian-Hua Adu School of Software Engineering Chengdu University of Information Technology School of Computing & Engineering University of Huddersfield School of Computer Science Chengdu University of Information Technology Department of Computing Sheffield Hallam University

The parallel computation capabilities of modern graphics processing units （GPUs） have attracted increasing attention from researchers and engineers who have been conducting high computational throughput studies. However, current single GPU based engineering solutions are often struggling to fulfill their real-time requirements. Thus, the multi-GPU-based approach has become a popular and cost-effective choice for tackling the demands. In those cases, the computational load balancing over multiple GPU ＂nodes＂ is often the key and bottleneck that affect the quality and performance of the real=time system. The existing load balancing approaches are mainly based on the assumption that all GPU nodes in the same computer framework are of equal computational performance, which is often not the case due to cluster design and other legacy issues. This paper presents a novel dynamic load balancing （DLB） model for rapid data division and allocation on heterogeneous GPU nodes based on an innovative fuzzy neural network （FNN）. In this research, a 5-state parameter feedback mechanism defining the overall cluster and node performance is proposed. The corresponding FNN-based DLB model will be capable of monitoring and predicting individual node performance under different workload scenarios. A real=time adaptive scheduler has been devised to reorganize the data inputs to each node when necessary to maintain their runtime computational performance. The devised model has been implemented on two dimensional （2D） discrete wavelet transform （DWT） applications for evaluation. Experiment results show that this DLB model enables a high computational throughput while ensuring real=time and precision requirements from complex computational tasks.

关键词： Heterogeneous GPU cluster dynamic load balancing fuzzy neural network adaptive scheduler discrete wavelet trans-form.

Two-dimensional materials-decorated microfiber devices for pulse generation and shaping in fiber lasers

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Chinese Physics B 2018年第9期27卷 63-72页

作者： zhi-Chao Luo＊ Meng Liu Ai-ping Luo and Wen-Cheng xu Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices ＆ Guangzhou Key Laboratory for Special Fiber Pbotonic Devices and Applications South China Normal UniversityGuangzhou 510006China

Two-dimensional（2D） materials have been regarded as a promising nonlinear optical medium for fabricating versatile optical and optoelectronic devices. Among the various photonic applications, the employment of 2D materials as nonlinear optical devices such as saturable absorbers for ultrashort pulse generation and shaping in ultrafast lasers is one of the most striking aspects in recent years. In this paper, we review the recent progress of 2D materials based pulse generation and soliton shaping in ultrafast fiber lasers, and particularly in the context of 2D materials-decorated microfiber photonic devices. The fabrication of 2D materials-decorated microfiber photonic devices, high performance mode-locked pulse generation, and the nonlinear soliton dynamics based on pulse shaping method are discussed. Finally, the challenges and the perspective of the 2D materials-based photonic devices as well as their applications are also discussed.

关键词： two-dimensional materials microfiber soliton dynamics fiber lasers

Regularized Methods for a Two-Stage Robust Production Planning Problem and its Sample Average Approximation

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Journal of the Operations Research Society of China 2023年第3期11卷 595-625页

作者： Jie Jiang zhi-ping Chen College of Mathematics and Statistics Chongqing UniversityChongqing401331China School of Mathematics and Statistics Xi'an Jiaotong UniversityCenter for Optimization Technique and Quantitative FinanceXi'an International Academy for Mathematics and Mathematical TechnologyXi'an 710049ShaanxiChina

In this paper,we consider a two-stage robust production planning model where the first stage problem determines the optimal production quantity upon considering the worst-case revenue generated by the uncertain future demand,and the second stage problem determines the possible demand of consumers by using a utility-based model given the production quantity and a realization of the random *** derive an equivalent single-stage reformulation of the two-stage ***,it fails the convergence analysis of the sample average approximation(SAA)approach for the reformulation *** we develop a regularized approximation of the second stage problem and derive its closed-form *** then present conditions under which the optimal value and the optimal solution set of the proposed SAA regularized approximation problem converge to those of the single-stage reformulation problem as the regularization parameter shrinks to zero and the sample size tends to ***,some preliminary numerical examples are presented to illustrate our theoretical results.

关键词： Production planning Utility function SAA Complementarity problem Regularized method

Synthesis of Novel Thiol Taxoid Based on the 7,10-Di-(2,2,2-trichloroethyl-oxycarbonyl)-10-deacetylbaccatin Ⅲ and (4R,5S)-2,4-Diphenyl-2-oxazoline-5-carboxylic acid: (2'R,3'R)-10-Deacetyl- 2'-deoxy-mercaptopaclitaxel

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有机化学 2004年第Z1期24卷 57-58页

作者： xu,Li QI,Xin ZHOU,zhi-ping Information College of Science and Technology Nanjing Forestry University Nanjing 210037 School of Chemical Engineering Dalian University of Technology Dalian 116012 College of Chemistry and Chemical Engineering Nanjing University Nanjing 210093

　　The complex natural product paclitaxel (TaxolR) 1, first isolated from Taxus brevifolia, and its semisynthetic analog,docetaxel 2, represent a large family of taxane diterpenoids, which revealed excellent clinical activity against ovarian and breast cancers, and showed promising results in the treatment of other cancers.[1] Extensive studies on the structure activity relationship (SAR) have been explored. It is already well known that a free hydroxyl group at the C-2' position on the C-13 side chain is crucial for microtubule binding[2] and may act as a hydrogen bond donor.……

关键词： natural product hydroxyl group hydrogen bond side chain

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硬碳负极材料储钠性能的影响因素分析

化学试剂 2025年第1期47卷 45-50页

作者：杨耀陈平施志聪广东工业大学材料与能源学院广东广州510000 深圳市电科电源股份有限公司广东深圳518000 衡阳电科电源有限公司湖南衡阳421000

以木质素磺酸钠和酚醛树脂为前驱体,采用喷雾干燥和油浴干燥两种方法制备硬碳前驱体,前驱体在预氧化、碳化及清洗步骤后得到硬碳材料。通过扫描电子显微镜、X射线衍射、氮气吸附/脱附测试和拉曼光谱等方法探究采用不同制备方法合成的硬... 详细信息

以木质素磺酸钠和酚醛树脂为前驱体,采用喷雾干燥和油浴干燥两种方法制备硬碳前驱体,前驱体在预氧化、碳化及清洗步骤后得到硬碳材料。通过扫描电子显微镜、X射线衍射、氮气吸附/脱附测试和拉曼光谱等方法探究采用不同制备方法合成的硬碳材料在结构形貌和物相上的差别,并通过电化学测试分析所制备的硬碳材料的电化学性能。结果表明,采用喷雾干燥法合成的硬碳前驱体制备的硬碳材料具有更稳定的球形结构和较小的比表面积。作为钠离子电池负极材料,这种硬碳材料在电池中展现出更高的首次库伦效率,并且具有更稳定的循环性能。

关键词：硬碳钠离子电池负极材料喷雾干燥油浴干燥

Plasma Niobium Surface Alloying of Pure Titanium and its Oxidation at 900 ℃

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Chinese Journal of Aeronautics 2007年第2期20卷 111-114页

作者： WANG Wen-bo ZHONG xu HE zhi-yong WANG Zhen-xia ZHANG ping-ze Research Institute of Surface Engineering Taiyuan University of Technology Taiyuan 030024 China Nanjing University of Aeronautics and Astronautics Nanjing 210016 China

A niobium-modified layer on pure titanium surface was obtained by means of double glow plasma surface alloying technique. The modified layer was uniform, continuous, compact and well adhered to the substrate. The niobium composition in the modified layer decreased gradually from the surface to the substrate. The oxidation behavior of the niobium-modified layer was investigated and com- pared with the untreated surface at 900 ~C for 100 h. Characterization of the layers was performed using X-ray diffraction and scanning electron microscope, respectively. The test results show that the oxidation behavior of pure titanium was improved by niobium alloying process. Niobium has a positive influence on the oxidation resistance.

关键词： niobium pure titanium plasma surface alloying oxidation

Data-driven Stochastic Programming with Distributionally Robust Constraints Under Wasserstein Distance:Asymptotic Properties

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Journal of the Operations Research Society of China 2021年第3期9卷 525-542页

作者： Yu Mei zhi-ping Chen Bing-Bing Ji Zhu-Jia xu Jia Liu Department of Computing Science School of Mathematics and StatisticsXi’an Jiaotong UniversityXi’an 710049China Center for Optimization Technique and Quantitative Finance Xi’an International Academy for Mathematics and Mathematical TechnologyXi’an 710049China

Distributionally robust optimization is a dominant paradigm for decision-making problems where the distribution of random variables is *** investigate a distributionally robust optimization problem with ambiguities in the objective function and countably infinite *** ambiguity set is defined as a Wasserstein ball centered at the empirical *** on the concentration inequality of Wasserstein distance,we establish the asymptotic convergence property of the datadriven distributionally robust optimization problem when the sample size goes to *** show that with probability 1,the optimal value and the optimal solution set of the data-driven distributionally robust problem converge to those of the stochastic optimization problem with true ***,we provide numerical evidences for the established theoretical results.

关键词： Distributionally robust optimization Wasserstein distance Ambiguity set Asymptotic analysis Empirical distribution

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屈原研究之我见

三峡大学学报（人文社会科学版） 2025年第1期47卷 13-17页

作者：徐志啸复旦大学中文系上海200433

历史上确有屈原其人,他创作的作品据《汉书·艺文志》记载共25篇,其中《离骚》是代表作,集中表现了屈原的人物形象、坎坷经历及其理想追求。屈原的初衷是当政治家、改革家,旨在振兴楚国,而不是要成为文学家和诗人。屈原的爱楚国,与今天... 详细信息

历史上确有屈原其人,他创作的作品据《汉书·艺文志》记载共25篇,其中《离骚》是代表作,集中表现了屈原的人物形象、坎坷经历及其理想追求。屈原的初衷是当政治家、改革家,旨在振兴楚国,而不是要成为文学家和诗人。屈原的爱楚国,与今天的爱国主义,不是同一概念。屈原属于堪与意大利但丁比肩的世界一流大诗人。从某种意义上可以说,楚辞姓“楚”,屈原姓“屈”。

关键词：屈原《离骚》改革家世界大诗人爱国主义

Graphene-decorated microfiber knot as a broadband resonator for ultrahigh-repetition-rate pulse fiber lasers

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Photonics Research 2018年第10期6卷 I0003-I0009页

作者： MENG Liu RUI TANG AI-ping Luo WEN-CHENG xu zhi-CHAO LUO Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices & Guangzhou Key Laboratory for Special Fiber Photonic Devices and Applications South China Normal University Guangzhou 510006 China Guangdong Provincial Engineenng Technology Research Center for Microstructured Functional Fibers and Devices South China Normal University Guangzhou 510006 China

Searching for an ultrahigh-repetition-rate pulse on the order of hundreds of gigahertz(GHz) is still a challenging task in the ultrafast laser community. Recently, high-quality silicon/silica-based resonators were exploited to generate a high-repetition-rate pulse based on the filter-driven four-wave mixing effect in fiber lasers. However,despite their great performance, the silicon/silica-based resonators still have some drawbacks, such as single waveband operation and low coupling efficiency between the fiber and resonators. To overcome these drawbacks,herein we proposed an all-fiber broadband resonator fabricated by depositing the graphene onto a microfiber knot. As a proof-of-concept experiment, the graphene-deposited broadband microfiber knot resonator(MKR)was applied to Er-and Yb-doped fiber lasers operating at two different wavebands, respectively, to efficiently generate hundreds-of-GHz-repetition-rate pulses. Such a graphene-deposited broadband MKR could open some new applications in ultrafast laser technology, broadband optical frequency comb generation, and other related fields of photonics.

关键词：重复频率脉冲激光技术发展现状通讯技术