175 research outputs found
Design and Implementation of Multi-Strategy System for Tobacco company
随着烟草系统业务量的不断增加,如何有效的对烟草零售商进行管理、智能差异化的提供货源成为了烟草公司发展所要面对的重要问题。设计并开发一款烟草一户一策系统,针对不同零售户提供不同的供货方案对于烟草公司提高工作效率是非常有必要的。 本系统以某烟草公司为例,设计并实现了一款某烟草公司一户一策系统。系统设计目标是根据每个零售户实际市场销售能力,对单个烟草零售户实现卷烟总限量差异化管理,根据历史销售数据完成货源的合理分配。考虑市场、客户、公司实际情况,按照一定规则,由系统自动生成每一个零售客户的每次货源供应策略。本文介绍了系统的开发背景及实现意义,指出了系统功能目的;对系统设计开发使用到的软件技术进行了...With the increasing volume of business of tobacco system, how effective management of tobacco retailers, intelligent differentiation provide sourcing has become an important problem to be faced with the growth of tobacco companies. Design and development of a user of a policy system of a tobacco, according to different retailers provide different plans for tobacco companies to improve the work eff...学位:工程硕士院系专业:软件学院_工程硕士(软件工程)学号:X201323029
日据以来北赛夏群与泰雅族的关系互动
赛夏族是台湾原住民族中人口较少的一支,分南北两群,聚居于苗栗县的南庄乡、狮潭乡与新竹县的五峰乡等地。清中期以后,北赛夏群从滨海平原迁移至五峰地区定居。日据初期,北赛夏群与周边的泰雅族因生存资源竞争等原因经常发生流血事件,关系一度非常紧张。日据后期开始,两族通过通婚、收养、日常交往、生产合作等多种方式,在交流过程中增进彼此了解,从而建立起比较和谐稳定的关系。从日据时代以来,双方的族群关系经历了由冲突到共生的演变过程。国家社会科学基金重大项目“台湾原住民族群关系研究”(14ZDB113
考虑存货风险可比性的转让定价调整方法研究
本文通过分析有限风险分销商与独立分销商之间的存货风险差异,对最频繁使用的转让定价方法——交易净利润法的应用进行了改进研究。首先,利用风险测度工具(VaR模型)对存货风险加以衡量,得出有限风险分销商与独立分销商的存货风险可比因素:存货管理成本率、存货过剩的损失率和存货不足的损失率。其次,为应用交易净利润法确定有限风险分销商的合理利润水平,针对存货风险因素的可比性调整提出了新的方法
Calculation of Ultimate Shear Strength of High Strength Concrete Column Reinforced with Concrete Filled Steel Tube
介绍了以圆钢管为钢骨的劲性高强混凝土柱的剪切性能试验的试验概况,在此基础上研究了它的斜截面承载力计算方法。在计算时,采用了将构件分成几个独立的抗力机构,相互叠加构成构件抗力体系的计算方法的计算模型。进而利用剪切性能试验得到的数据结果进行参数回归,得到以圆钢管为钢骨的劲性高强混凝土柱的斜截面承载力计算公式。General situation about shear experiments of high concrete columns reinforced with concrete filled steel tube is presented,and method for calculating ultimate shear strength of the columns is discussed based on the experimental results.Shearing resistant mechanism of the columns can be made up of several simple individual shearing resistant mechanisms,and then the formula for calculating ultimate shear strength can be established by superposing the actions of these shearing resistant mecnanisms.In the further analysis,the unknown parameter in the formula is regressed using the test data of shear experiments
NUMERICAL ANALYSIS OF LOAD-MOMENT INTERACTION DIAGRAM FOR HIGH STRENGTH CONCRETE COLUMN REINFORCED WITH CONCRETE FILLED STEEL TUBE
介绍了以圆钢管为钢骨的劲性高强混凝土柱的抗震性能研究的试验概况,在此基础上采用条带有限元法进行了弯矩-轴力相关曲线的数值分析,计算结果与试验结果大致吻合,可以用于确定该类柱在偏压状态下的极限承载力。The general situation of earthquake-resistant behavior experiments of high concrete columns reinforced with concrete filled steel tube is presented.Based on the experimental results,the numerical analysis of load-moment interaction diagram for the columns is completed using strip finite element analysis method.The calculation results are in basic agreement with those of the experimental values,so the numerical analysis method can be used to determine the ultimate bearing capacity of the columns under eccentric compression
Ultimate Strength of High Strength Concrete Columns Reinforced with Concrete Filled Steel Tube Under Axial Compression and their Reliability Analysis
为了探求一个合理的设计公式来计算带圆钢管的劲性高强混凝土柱在轴压下的极限强度,完成了包含13个短柱试件在内的轴心受压试验以研究该类柱在轴压下的破坏模式和极限强度.试验结果表明,在荷载作用下,直到荷载接近极限值时,柱中钢管、纵向钢筋以及混凝土三者之间的纵向应变基本上是协调的,计算结果与试验结果吻合良好,因此可以采用叠加原理来计算带圆钢管的劲性高强混凝土柱在轴压下的极限承载力.此外,分析了该极限承载力计算公式的可靠度水平.分析结果表明,该承载力计算满足GB50068-2001对构件可靠指标的要求.This paper aims at developing a rational design formula to predict the ultimate strength of high strength concrete columns reinforced with concrete filled steel tube (HSCCRST) under axial compression. In order to investigate the failure mode and the ultimate strength of the columns under axial compression, experimental tests of 13 specimens under axial compression were performed. Test results showed that the longitudinal strain of the steel tube, the longitudinal reinforcement, and the concrete in the column were all compatible under loading until the load applied was close to the ultimate load. Therefore, the ultimate strength of HSCCRST could be calculated in the principle of superposition. In addition, the reliability level of the columns under axial compression designed following the proposed formula was investigated. Analysis results indicated that the reliability indexes of the columns designed following the proposed formula satisfied the demand of Unified Standard for Reliability Design of Building Structures (GB 50068-2001), National Standard of the People's Republic of China.国家自然科学基金资助项目(50378034
微型、超轻型中低空多光谱遥感设备
介绍了一种新型的多光谱遥感装备,该遥感装备因其体积小、重量轻、造价低等显著特点而非常适用于中低空的目标探测,该套设备在光谱成像方面采用棋盘式微滤片进行滤波。文章对微滤片的制备工艺过程、微滤片的几何、重量、光学等指标、以及后续的无线图像传输系统的集成制作和对实验结果的分析、评价都进行了说明
Optimization of degrease process during extracting collagen from sea-fish scales
研究了鱼鳞胶原蛋白提取过程中的脱脂工艺条件。采用l9(33)正交实验,考察了碱浓度、温度、时间等因素对鱼鳞脱脂工艺的影响,并使用离子色谱检测了脱脂溶液中羟脯氨酸的含量,以考察各种条件对鱼鳞胶原蛋白在脱脂工艺过程中溶出的影响。确定了鱼鳞胶原蛋白提取过程中的脱脂优化工艺,即温度18℃,碱浓度0.5MOl/l,时间8H。放大实验至原料2kg,得脱脂率为92%,适合规模化生产。Degreasation process during collagen extraction from sea-fish scales was explored.The effect of base concentration,temperature and time on degreasing were investigated with the orthogonal method.Ion chromatography was applied to observe the effects of factors on the dissolution of collagen from scales while degreasing.The optimum parameters were:temperature 18℃,base concentration 0.5mol/L and degreasing time 8h.The process was carried out at large scale well with degrease rate at 92%,which indicated that the process could be performed for plant-scale production.国家海洋局第三海洋研究所科研基本业务费(海三科2009006);国家科技支撑计划(2007BAB26B03
2018年安溪珠塔内窑调查报告
2018年5月至7月,厦门大学历史系考古专业、福建博物院文物考古研究所及安溪县博物馆等单位联合组成\"安溪古窑址调查队\",对安溪珠塔内窑进行了全面的调查,基本了解珠塔内窑古窑址分布与保存情况,采集了一批明末清初的青花瓷器、白瓷与窑具标本,并发现部分窑炉遗迹,为研究闽南地区青花瓷窑业发展提供了第一手资料
Study on Rollover Instability Mechanism and Instability Indicator for Articulated Wheel Loaders
铰接轮式装载机具有变结构、变载荷和质心位置随机变动等特点,常在非结构复杂环境下作业,极易发生侧翻失稳事故。对车辆进行失稳主动安全控制是防止侧翻事故发生最直接有效的方法,而对侧向失稳状态进行预测是实现主动安全控制的前提和关键。本文针对铰接轮式装载机侧向失稳机理及预测指标进行研究,以解决对铰接轮式装载机失稳状态进行准确判断的关键问题,并探索可靠的实时检测方法。主要完成了以下工作: (1)提出了能够综合表征轮式装载机侧倾稳定性的失稳预测指标。在充分考虑轮式装载机特殊结构及其特殊的侧倾翻过程的前提下,提出以稳定面与合力向量的夹角作为综合表征轮式装载机侧向稳定性的失稳预测指标,将这个指标命名为“稳态余...Articulated wheel loaders are featured by variable structure, variable mass and random shift of their center of gravity, and they usually work on bumpy road, thus they are prone to rollover accidents. To control vehicle lateral stability actively is the most direct and effective way to prevent the occurrence of rollover accidents, while rollover prediction is the key and premise to achieve an acti...学位:工学硕士院系专业:航空航天学院_车辆工程学号:1992013115289
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