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基于遗传算法的线束加工仓库货位优化研究 被引量:8
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作者 苏永杰 胡俊 《包装工程》 CAS 北大核心 2018年第19期110-116,共7页
目的文中以减少汽车线束加工立体仓库堆垛机运行时间和距离,提高订单处理效率为目的,建立货位优化的数学模型。方法根据某汽车线束加工立体仓库的真实情况,在分析历史订单数据的基础上,通过基于定位储存策略的改进遗传算法对货位分配问... 目的文中以减少汽车线束加工立体仓库堆垛机运行时间和距离,提高订单处理效率为目的,建立货位优化的数学模型。方法根据某汽车线束加工立体仓库的真实情况,在分析历史订单数据的基础上,通过基于定位储存策略的改进遗传算法对货位分配问题进行仿真和求解。结果仿真结果表明,定位存储策略优于就近存储策略、随机存储策略和分类存储策略,其减少堆垛机运行时间的比例分别达到了18.8%,16.9%和35.7%。结论采用定位存储模型能有效改善汽车线束加工立体仓库系统处理生产订单的效率。 展开更多
关键词 立体仓库 货位优化 定位存储 遗传算法
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胞内分枝杆菌型NTM肺病二例误诊原因分析 被引量:1
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作者 葛向华 苏永杰 张国从 《临床误诊误治》 2020年第12期10-12,共3页
目的分析非结核分枝杆菌(non-tuberculous mycobacteria,NTM)肺病误诊原因。方法回顾分析误诊为肺结核的NTM肺病2例临床资料。结果2例均因咳嗽咳痰就诊,2次痰涂片抗酸杆菌均阳性,胸部CT检查均有肺尖部胸膜下薄壁空洞,肺部散在斑片影伴... 目的分析非结核分枝杆菌(non-tuberculous mycobacteria,NTM)肺病误诊原因。方法回顾分析误诊为肺结核的NTM肺病2例临床资料。结果2例均因咳嗽咳痰就诊,2次痰涂片抗酸杆菌均阳性,胸部CT检查均有肺尖部胸膜下薄壁空洞,肺部散在斑片影伴支气管扩张,初步诊断为肺结核,抗结核治疗均无效,外院行痰细菌培养均提示胞内分枝杆菌生长,明确诊断为NTM肺病。按药物敏感试验结果予抗NTM治疗,患者症状逐步消失,肺部病变逐步吸收好转,复查痰细菌培养3次均阴性,1例疗程1年半,1例疗程2年,随访至今病情稳定无复发。结论NTM肺病临床表现与肺结核病相似,但发病率低,临床少见,易误漏诊,临床医生应提高警惕,及时行NTM检测是确诊的关键。 展开更多
关键词 肺疾病 非结核分枝杆菌 误诊 结核
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A Quantitative Analysis on Grassland Animal Husbandry of Sichuan Tibetan Region after the Liberation
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作者 su yong-jie 《Animal Husbandry and Feed Science》 CAS 2011年第2期4-7,41,共5页
[ Objective ] To study economic growth of grassland animal husbandry in Sichuan Tibetan region after the liberation and predict long-term trend and regular features of growth and development of grassland animal husban... [ Objective ] To study economic growth of grassland animal husbandry in Sichuan Tibetan region after the liberation and predict long-term trend and regular features of growth and development of grassland animal husbandry. [ Method] Using econometric models and methods, the gov- ernment statistical data after the liberation on grassland animal husbandry of Sichuan Tibetan region were analyzed, and the factors increasing econ- omy of grassland animal husbandry were determined by analyzing time series data of different periods. [ Result] The grassland animal husbandry of Sichuan Tibetan region had significant characteristics of traditional pastoral economy. Before the reform and opening-up, the increase of animal hus- bandry economy was mainly manifested by increase in amount of livestock and laborers, and the increase in amount of livestock was principal pro- moting factor. After the reform and opening-up, the increase in integrated production factors became the primary cause to push the increase of ani- mal husbandry economy. [ Conclusion] Some new measures must be taken to promote the increase of animal husbandry economy of Sichuan Tibetan region, including transforming traditional production mode of animal husbandry, relying on scientific and technological advances, further improving socio- economic system, cultivating more highly sldlled workforce and effectively guiding rational shift and orderly migration of surplus pasture laborers. 展开更多
关键词 Sichuan Tibetan region Grassland animal husbandry Model of growth Quantitative analysis
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