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基于排队论的某食品零售店收银系统优化研究

价值工程 2024年第11期43卷 9-13页

作者：周素霞杨璐北京建筑大学城市轨道交通车辆服役性能保障北京市重点实验室北京100044 北京建筑大学机电与车辆工程学院北京100044

对于某食品零售店高峰期排队结账时间较长的问题,提出两种针对性的解决方案。通过选取节假日客流高峰时间段的数据进行现场采集,基于运筹学中的排队理论对该食品零售门店高峰期两小时的实际客流进行统计,运用python建立M/G/2模型,利用... 详细信息

对于某食品零售店高峰期排队结账时间较长的问题,提出两种针对性的解决方案。通过选取节假日客流高峰时间段的数据进行现场采集,基于运筹学中的排队理论对该食品零售门店高峰期两小时的实际客流进行统计,运用python建立M/G/2模型,利用真实数据进行模拟仿真,根据仿真结果提出两种可行的优化方案,并对优化方案进行仿真计算。计算结果表明,不论是收银系统的改变还是排队模式的改变,都能够更加充分地利用环境资源、硬件资源和人力资源,能帮助该类门店缓解高峰时期客流拥堵的现象,由此见得,优化后的系统相较于优化前更加高效合理。这样门店就能够将更好的服务提供给消费者,从而提高消费者的满意程度,为企业带来更大的效益,门店可以根据实际情况安排合适的优化方式。

关键词：排队论 M/G/n模型排队优化 python 泊松分布柯西分布

Game Theoretical Secure Wireless Communication for UAV-assisted Vehicular Internet of Things

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China Communications 2021年第7期18卷 147-157页

作者： Bo Liu zhou su Qichao Xu School of Mechatronic Engineering and Automation Shanghai UniversityShanghaiChina School of Cyber Security Xi’an Jiaotong UniversityXi’an 710049China

With the ever-expanding applications of vehicles and the development of wireless communication technology,the burgeoning unmanned aerial vehicle(UAV)assisted vehicular internet of things(UVIoTs)has emerged,where the ground vehicles can experience more efficient wireless services by employing UAVs as a temporary mobile base ***,due to the diversity of UAVs,there exist UAVs such as jammers to degenerate the performance of wireless communication between the normal UAVs and *** solve above the problem,in this paper,we propose a game based secure data transmission scheme in ***,we exploit the offensive and defensive game to model the interactions between the normal UAVs and ***,the strategy of the normal UAV is to determine whether to transmit data,while that of the jammer is whether to *** then formulate two optimization problems,i.e.,maximizing the both utilities of UAVs and ***,we exploit the backward induction method to analyze the proposed countermeasures and finally solve the optimal ***,the simulation results show that the proposed scheme can improve the wireless communication performance under the attacks of jammers compared with conventional schemes.

关键词： UAV-assisted vehicular internet of things(UVIoTs) jammers offensive and defensive game wireless transmission

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频域特征驱动的车辆旋转部件灰色故障诊断

振动．测试与诊断 2024年第3期44卷 514-522,619,620页

作者：苏舟石娟娟关云辉张晶黄伟国沈长青朱忠奎苏州大学轨道交通学院苏州215131 中车戚墅堰机车车辆工艺研究所有限公司常州213011

根据不同故障引起的振动信号频域特征各异的特点,首先,运用调Q小波变换(tunable Q-factor wavelet transform,简称TQWT)的频率响应对车辆旋转部件振动信号或其包络信号进行分析,构建以信号在不同频段各子带能量占比为元素的特征向量;其... 详细信息

根据不同故障引起的振动信号频域特征各异的特点,首先,运用调Q小波变换(tunable Q-factor wavelet transform,简称TQWT)的频率响应对车辆旋转部件振动信号或其包络信号进行分析,构建以信号在不同频段各子带能量占比为元素的特征向量;其次,针对灰色接近关联度在处理2组相交的序列时存在的两序列变化趋势不同、原始累差小而导致关联度过大的问题,提出了灰色绝对接近关联度模型;最后,在所构建的频域特征向量驱动下,计算其与标准模式的灰色绝对接近关联度,对车辆关键旋转部件故障状态进行识别。利用所提方法对列车轮对轴承和汽车变速器齿轮箱不同运行状态的振动信号进行分析,结果表明,所提方法能够准确识别车辆旋转部件的运行状态和故障类型,通过对比分析验证了该方法的优越性。

关键词：轴承齿轮箱故障诊断故障辨识能量分布

银杏内酯注射液联合多巴丝肼治疗帕金森病的临床疗效

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世界复合医学 2024年第5期10卷 48-51页

作者：周苏张涛崔晨晨徐州医科大学附属医院神经内科江苏徐州221000

目的分析银杏内酯联合多巴丝肼治疗帕金森病的疗效。方法选取2021年6月—2022年6月徐州医科大学附属医院神经内科收治的100例帕金森病患者为研究对象,根据不同的治疗方法分成对照组和研究组,各50例。对照组口服多巴丝肼片,研究组在对... 详细信息

目的分析银杏内酯联合多巴丝肼治疗帕金森病的疗效。方法选取2021年6月—2022年6月徐州医科大学附属医院神经内科收治的100例帕金森病患者为研究对象,根据不同的治疗方法分成对照组和研究组,各50例。对照组口服多巴丝肼片,研究组在对照组基础上联用银杏内酯注射液。比较两组治疗前后统一帕金森病评定量表第Ⅲ部分(Unified Parkinson's Disease Rating Scale-Ⅲ,UPDRS-Ⅲ)评分、帕金森病生活质量问卷(Parkinson's Disease Questionnaire,PDQ-39)评分、血清同型半胱氨酸(homocysteine,Hcy)和肿瘤坏死因子-α(tumor necrosis factor-α,TNF-α)水平、不良反应发生情况。结果治疗后研究组UPDRS-Ⅲ评分为(27.70±8.58)分,低于对照组的(32.68±10.30)分,研究组PDQ-39评分为(31.10±4.09)分,低于对照组的(36.20±6.34)分,差异有统计学意义(t=2.627、4.780,P=0.010、0.006)。治疗后两组患者Hcy、TNF-α水平下降,且研究组低于对照组,差异有统计学意义(P均0.05)。结论相比单用多巴丝肼,巴丝肼联合使用银杏内酯可以提高帕金森病患者的生活质量,降低脑血管病风险及炎症因子水平,且不良反应发生率低,有效性和安全性皆有保障。

关键词：帕金森病银杏内酯多巴丝肼

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Caching Algorithm with a Novel Cost Model to Deliver Content and Its Interest over Content Centric Networks

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China Communications 2015年第7期12卷 23-30页

作者： su zhou FANG Dongfeng HAN Bo School of Mechatronic Engineering and Automation Shanghai University Institute of Electronic and Information Xi'an Jiaotong University

Recently the content centric networks(CCNs) have been advocated as a new solution to design future networks. In the CCNs, content and its interest are delivered over the content store and pending interest table, respectively, where both have limited capacities. Therefore, how to design the corresponding algorithms to efficiently deliver content and inertest over them becomes an important issue. In this paper, based on the analysis of content distribution, status of content store, and pending interest, we propose a novel caching algorithm with which the resources of content store and pending interest table can be efficiently used. Simulation results prove that the proposal can outperform the conventional methods.

关键词： content centric networks content delivery caching future networks

Constructing a raster-based spatio-temporal hierarchical data model for marine fisheries application

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Acta Oceanologica Sinica 2006年第1期25卷 57-63页

作者： su Fenzhen zhou Chenhu ZHANG Tianyu Marine GIS Center State Key Laboratory of Resources and Environmental Information System Institute of Geographical Sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100101 China

Marine information has been increasing quickly. The traditional database technologies have disadvantages in manipulating large amounts of marine information which relates to the position in 3-D with the time. Recently, greater emphasis has been placed on GIS （geographical information system）to deal with the marine information. The GIS has shown great success for terrestrial applications in the last decades, but its use in marine fields has been far more restricted. One of the main reasons is that most of the GIS systems or their data models are designed for land applications. They cannot do well with the nature of the marine environment and for the marine information. And this becomes a fundamental challenge to the traditional GIS and its data structure. This work designed a data model, the raster-based spatio-temporal hierarchical data model （RSHDM）, for the marine information system, or for the knowledge discovery fi＇om spatio-temporal data, which bases itself on the nature of the marine data and overcomes the shortages of the current spatio-temporal models when they are used in the field. As an experiment, the marine fishery data warehouse （FDW） for marine fishery management was set up, which was based on the RSHDM. The experiment proved that the RSHDM can do well with the data and can extract easily the aggregations that the management needs at different levels.

关键词： marine geographical information system spatio-temporal data model knowledge discovery fishery management data warehouse

Integration of stereotactic radiosurgery or whole brain radiation therapy with immunotherapy for treatment of brain metastases

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Chinese Journal of Cancer Research 2020年第4期32卷 448-466页

作者： zhou su Lin zhou Jianxin Xue You Lu Department of Thoracic Oncology Cancer Center and State Key Laboratory of BiotherapyWest China HospitalSichuan UniversityChengdu 610041China Department of Oncology Sichuan Mianyang 404 HospitalMianyang 621000China

The prognosis of brain metastases(BM)is traditionally *** are mainly treated by local radiotherapy,including stereotactic radiosurgery(SRS)or whole brain radiation therapy(WBRT).Recently,immunotherapy(i.e.,immune checkpoint inhibitors,ICI)has demonstrated a survival advantage in multiple malignancies commonly associated with ***,radiotherapy and ICI both treat BM efficiently;hence,their combination seems *** this review,we summarize the existing preclinical and clinical evidence that supports the applicability of radiotherapy as a sensitizer of ICI for ***,we discuss the optimal timing at which radiotherapy and ICI should be administered and review the safety of the combination *** from a few clinical studies suggest that combining SRS or WBRT with ICI simultaneously rather than consecutively potentially enhances brain abscopal-like responses and ***,there is a lack of conclusion about the definition of"simultaneous";the cumulative toxic effect of the combined therapies also requires further ***,ongoing and planned prospective trials are needed to further explore and validate the effect,safety,and optimal timing of the combination of immunotherapy with radiotherapy for patients with BM.

关键词： Immunotherapy radiotherapy immune checkpoint inhibitors brain metastases review

Mathematical Model for Growth of Inclusion in Deoxidization on the Basis of Unreacted Core Model

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Journal of Iron and Steel Research International 2008年第6期15卷 24-28页

作者： WU su zhou ZHANG Jiong-ming Metallurgical and Ecological Engineering School University of Science and Technology Beijing Beijing 100083 China

Controlling inclusion composition, from the point of view of thermodynamics, only explains the probability and limit of reaction. However, kinetics makes the nucleation and the velocity of growth of inclusions clear, and these kinetic factors are very important to the quality of slab. The basic kinetic theory of unreacted core model was used to build the mathematical model for the growth of inclusions and the concerned software was developed through Visual Basic 6.0. The time that different radius inclusions attain saturation was calculated to determine the controlling step of reaction between steel and inclusions. The time for the growth of inclusion obtained from the model was in good agreement with the data measured by Japanese Okuyama G, which indicated that the model is reasonable.

关键词： inclusion finite difference method kinetic theory unreacted core model

Determination of vinyl orientation of mouse neuroglobin by 2D nuclear Overhauser spectroscopy

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Chinese Chemical Letters 2007年第3期18卷 319-321页

作者： su Yuan zhou Xiao Yan Wei Department of Biomechanlcs Shanghai University of Sports Shanghai 200438 China

^1H NMR has been used to determine the 2-, 4-vinyl orientation of heme active site from oxidized mouse neuroglobin （mNgb）. The NOEs between 3-methyl and Hα, Hβ of 2-vinyl, together with the NOEs between 5-methyl and Hα, Hβ of 4-vinyl, allowed the unambiguous determination of trans and cis orientations for the 2- and 4-vinyl groups in the mNgb, respectively.

关键词： Heme Vinyl orientation Neuroglobin