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求解Flow-shop调度问题的HSGATS算法研究

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计算机工程与应用 2004年第9期40卷 46-49页

作者：闵涛梅运谊邹学文彭天芳西安理工大学数学系西安710048 北方交通大学数学系北京100044

通过研究流程企业典型生产加工方式的Flow-shop加工调度问题,分析了求解这一调度问题的各种算法的性能,特别是混合遗传算法中的混合策略,进而提出了一种以启发式搜索算法为前置算法、遗传算法为主体算法、禁忌搜索算法为后置算法的新的... 详细信息

通过研究流程企业典型生产加工方式的Flow-shop加工调度问题,分析了求解这一调度问题的各种算法的性能,特别是混合遗传算法中的混合策略,进而提出了一种以启发式搜索算法为前置算法、遗传算法为主体算法、禁忌搜索算法为后置算法的新的混合遗传算法-HSGATS算法,并针对置换Flow-shop调度问题提出了具体的算法设计和实现方法;通过对大量置换Flow--ShopBenchmark问题进行实验求解和其他算法的比较分析,验证了此算法是十分有效的。

关键词：启发式搜索算法遗传算法禁忌搜索算法 Flow—shop 生产调度

Activation of peripheral ERKs pathway is involved in melittin-induced pain-related behaviors and hyper-responsiveness of spinal cord dorsal horn sensory neurons in the rat

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Activation of peripheral ERKs pathway is involved in melitti...

中国神经科学学会第四次会员代表大会暨第七届全国学术会议

作者： Yao-Qing YU~1,Jun CHEN~(1,2. 1 Institute for Biomedical Sciences of Pain,Tangdu Hospital,Fourth Military Medical university,xi''an 710038,china 2.Institute for Biomedical Sciences of Pain,Capital Medical university,Beijing 100069,china

＜正＞Objective To investigate the roles of peripheral extracellular signaling-regulated kinases 1/2.ERKs） pathway in melittin-induced pain-related behaviors and responses of spinal wide-dynamic-range（WDR） neurons,a population of "central encoder" along the spinally-organized sensorimotor（SOSM） reflex *** In behavioral experiments, persistent spontaneous nociceptive behavioral response of rats was determined by counting the number of paw flinches during each 5 min interval for 1 h following *** *** and mechanical hypersensitivity were measured with TC-1 radiant heat stimulator and ascending graded von Frey monofilaments,*** electrophysiological experiments, typical WDR neurons characterized by increased spike firing rate to brush,pressure and noxious pinch were applied to the peripheral receptive ***（1） Pre-treatment with UOl 2.（a specific MAPK kinase inhibitor,0.1,1.0,10μg） resulted in dose-related suppressions to melittin-induced persistent paw flinches（8%-,34%,42.） and heat hypersensitivity（2.%. 33%and 31%）,but without any effectiveness on mechanical hypersensitivity.（2. Post-treatment of U012.（10μg） resulted in 51%suppressive effect on paw finches and 39%reversal effect on heat hypersensitivity,but without any effectiveness on mechanical hypersensitivity.（3） Treatment of U0l2.（1.0μg） suppressed the tonic firing and enhanced responsiveness to heat stimulus in WDR neurons,but without any effectiveness on the increased neuronal responsiveness to either innocuous or noxious mechanical stimuli.（4） The possible systemic effect of U012. was ruled out by intraplantar injection of U012.(10（ig） into the contralateral hind *** Peripheral ERKs pathway might be involved in pathophysiological processing associated with melittin-induced facilitation and sensitization of SOSM reflex circuitry by enhancing the ability of spinal dorsal horn WDR neurons in response to peripheral noxious thermal but not mechanical stim

关键词： ERKs melittin wide-dynamic-range neuron electrophysiology pain hypersensitivity

空间句法视角下的犍为清溪古镇街巷空间结构分析

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智能建筑与智慧城市 2024年第4期 57-59页

作者：张宸郗西南交通大学建筑学院

乐山市犍为清溪古镇位于西南丝绸之路重要支线——“沐源川道”上,古时是重要的驿站古镇。而古镇的街巷空间结构作为其“骨架”,具有特殊的地域文化与自然地理特征,同时承载着重要的历史信息。文章以犍为清溪古镇为例,通过运用空间句法... 详细信息

乐山市犍为清溪古镇位于西南丝绸之路重要支线——“沐源川道”上,古时是重要的驿站古镇。而古镇的街巷空间结构作为其“骨架”,具有特殊的地域文化与自然地理特征,同时承载着重要的历史信息。文章以犍为清溪古镇为例,通过运用空间句法量化方法对古镇的街巷空间进行量化分析,对古镇的规划建设提出参考建议。

关键词：街巷空间结构空间句法古镇

Altered locomotor and exploratory behaviors of rats caused by subcutaneous bee venom injection:open field test

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Altered locomotor and exploratory behaviors of rats caused b...

中国生理学会第2.届全国会员代表大会暨生理学学术大会

作者： Dan LU~1,Jun CHEN~(1,2.*) 1 Institute for Biomedical Sciences of Pain,Capital Medical university,Beijing 100069,china 2.Institute for Biomedical Sciences of Pain and Institute for Functional Brain Disorders,Tangdu Hospital,Fourth Military Medical university,xi''an 710038,china

＜正＞Background:Pain is usually considered to be a complex phenomenon,which requires the scoring of several behavioral *** pathological state,persistent or chronic pain can affect various higher brain functions and lead to emotional *** open field test is usually used to study the emotional state,the effect of various pharmacological agents,biological/physical environmental factors,and the impact of chronic pain on emotional ***,the spontaneous behavioral responses induced by peripheral persistent inflammatory pain in the open field were rarely ***:In this report,we investigated the altered behavioral responses induced by hind-paw bee venom（BV） injection and the relationship between pain-related behaviors and spontaneous responses in the open ***:Male Sprague-Dawley albino rats were randomly divided into four groups:naive,saline,BV-inflamed,bupivacaine-pretreated BV-inflamed *** the open field test,the spontaneous behavioral responses of the rats in these four groups were clearly and long-term ***: It was found that BV-induced persistent nociception can reduce the locomotor and exploratory behavioral responses. The BV-inflamed group also has a significantly increased traveled distance in four corners and decreased traveled distance in center and four *** addition,these altered spontaneous pain-related responses in open field can be reversed by ***:We demonstrated that bee venom induced persistent nociception can elicit alteration of spontaneous behavioral responses in open field which is relevant to pain-related behavior directly.

关键词： open field test spontaneous behavioral responses persistent nociception bee venom test

ANALYSIS AND REDUCTION OF CONDUCTED EMI FROM AN AC/DC HIGH POWER CONVERTER

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ANALYSIS AND REDUCTION OF CONDUCTED EMI FROM AN AC/DC HIGH P...

IEEE 2.05 International Symposium on Microwave, Antenna, Propagation and EMC Technologies for Wireless Communications

作者： Xue Wenyan, Ma xikui School of Electrical Engineering, xi’an Jiaotong university, xi’an, 710049, china

This paper discusses how to reduce conducted electromagnetic interference (EMI) from an AC/DC high power converter to agree with EN class A. Herein some passive methods of suppressing conducted EMI no

关键词： EMI reduction AC/DC converter Conducted EMI

A Novel Channel Equalization Approach using Spatial Correlation Clutters

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A Novel Channel Equalization Approach using Spatial Correlat...

International Conference on Broadcast Technology and Multimedia Communication(BTMC 2.10)

作者： xiangyang Liu and Lianrui Kang xi’an Communication Institute xi’an 710106,china Jing Wang School of Information Engineering Chang’an university xi’an 710064,china

For the multi-channel ground moving target indication（GMTI） system in the aircraft platform,the channel mismatch will degrade the performance of clutter suppression,thus decreasing the detection probability for moving *** this paper,a novel channel equalization approach using the spatial correlation properties of ground clutters is presented,which can equalize the mismatch errors without calibration signals and refitting the radar equipments in use,reducing the complexity of the multi-channel airborne SAR-GMTI *** analysis shows that the response of the estimated equalizer approaches the practical mismatch errors when the clutter-to-noise ratio（CNR） of the data is high ***,experimental results using measured data are given to demonstrate the validity of the proposed method.

关键词： channel equalization SAR-GMTI clutter suppression multi-channel echo model.

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基于动态批量评估的绿色无梯度优化方法

软件学报 2024年第4期35卷 1732-1750页

作者：钱鸿舒翔孙天祥邱锡鹏周爱民华东师范大学上海智能教育研究院上海200062 华东师范大学计算机科学与技术学院上海200062 复旦大学计算机科学技术学院上海200438

在基于语言模型即服务的提示词黑盒微调、机器学习模型超参数调节等优化任务中,由于解空间到性能指标之间的映射关系复杂多变,难以显式地构建目标函数,故常采用无梯度优化方法来实现寻优.解的准确、稳定评估是有效实施无梯度优化方法的... 详细信息

在基于语言模型即服务的提示词黑盒微调、机器学习模型超参数调节等优化任务中,由于解空间到性能指标之间的映射关系复杂多变,难以显式地构建目标函数,故常采用无梯度优化方法来实现寻优.解的准确、稳定评估是有效实施无梯度优化方法的关键,完成一次解的质量评估常要求在整个数据集上完整运行一次模型,且优化过程有时需要大量评估解的质量.随着机器学习模型复杂度以及训练样本量的不断增加,准确、稳定的解的质量评估时间成本与计算代价越来越高昂,这与绿色低碳机器学习与优化理念背道而驰.有鉴于此,提出了一种基于动态批量评估的绿色无梯度优化方法框架(green derivative-free optimization with dynamic batch evaluation,GRACE),基于训练子集的相似性,在优化过程中自适应动态调节评估解时使用的样本量,使得GRACE在保证优化性能的同时,降低优化成本与代价,达到绿色低碳高效的目标.在语言模型即服务提示词黑盒微调、模型超参数优化等实际任务上进行了实验验证,通过与一系列对比方法以及GRACE消融退化版算法进行比较分析,表明了GRACE的有效性、高效性、绿色低碳性.超参数分析结果表明了其具备超参数稳健性.

关键词：无梯度优化演化学习绿色低碳动态批量评估

Finite element simulating of temperature and stress fields for linear friction welding of Ti6Al4V

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Finite element simulating of temperature and stress fields f...

第五届国际材料与热加工物理模拟及数值模拟学术会议

作者： Wende BUa Jinhe LIUb northwestern Polytechnical university xi’an 710072.{2.

The present paper concerns the variation of temperature and stress fields during the linear friction welding （LFW） process obtained by the thermo-mechanical coupled analysis method. A numerical model of LFW of Ti6Al4V is established, according to the characters of LFW and friction theory. In the model the thermal calculation is coupled to the mechanical solution. Meanwhile, the constitutive relation of Ti6Al4V in condition of large elasto-plastic deformation is taken into account. The law of variation of transient temperature fields and stress fields in different instant is systematically investigated. Accordingly, the calculation results of temperature field indicate that there is a very high heating rate and a steep gradient in the welded joint zone during the heating phase. The stress field of the welded joint is induced by uneven distribution of temperature and deformation degree. The calculation data of temperature is in good agreement with the experimental data measured by means of thermocouples at some points. In conclusion, the numerical model created in this study is effective to simulate thermo-mechanical process of LFW of Ti6Al4V. The information obtained form this numerical calculation work can provide a theory base for technical parameters optimization of the welding performance of LFW of Ti6Al4V.

关键词： Linear friction welding finite element simulation temperature field stress field thermo-mechanical analysis

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糯扎渡水电站垂向二维非恒定流的数值模拟

水力发电学报 2003年第3期22卷 88-94页

作者：冯民权周孝德郑邦民西安理工大学 685信箱西安710048 武汉大学水电学院武汉430072

本文针对宽深比较小 ,有关参量 (如流速、温度、浓度 )的垂向变化比水平横向的变化为大的水库 ,建立垂向二维水流数学模型 ,水深随时、空而变 ,垂向做σ变换将可变域变为规则区域。采用算子分裂法、交错网格法、有限差分法进行计算。对... 详细信息

本文针对宽深比较小 ,有关参量 (如流速、温度、浓度 )的垂向变化比水平横向的变化为大的水库 ,建立垂向二维水流数学模型 ,水深随时、空而变 ,垂向做σ变换将可变域变为规则区域。采用算子分裂法、交错网格法、有限差分法进行计算。对糯扎渡水电站的非恒定流数值模拟结果是合理的。

关键词：水力学数值模拟垂向二维 σ变换自由面