目标成本管理在机械加工行业的应用

以机械加工行业为例,探讨了目标成本管理在企业管理工作中的应用     

汉语典籍英译的言意之辨视角

在对汉语典籍英译时，译者要运用关联思维，秉承与时俱退和互文的理念，遵循“得意一忘言一循意得言一得言忘意”的翻译过程，探求原作的“言外之意”，然后发挥译入语的优势，展现原作语言层面之下蕴舍的思想。     

中国南方海相页岩气有利目标区优选的模糊相似法

有利目标区优选是页岩气勘探开发的前提.根据中国南方海相页岩气成藏特点,筛选了页岩有效厚度、有机碳含量、孔隙度等13项页岩气有利目标区优选评价指标,并且结合国内外页岩气勘探开发经验,建立了评价指标的分级分类评价标准.针对页岩气储层的厚度大、非均质性以及勘探早期对评价指标值的地质认识准确度较低,用区间数距离体现页岩气有利目标区优选的不确定信息评价指标值差异,应用模糊相似理论,建立了页岩气有利目标区优选的分级、分类并能区分优劣的模糊相似方法.实例计算分析结果表明,该方法与综合信息叠合法相比,评价结果可靠程度高,而且能判明被评价页岩气区的有利类型和优劣顺序.     

机动目标跟踪中机动频率的自适应调整

研究机动目标跟踪过程中机动频率的自适应调整方法,使其值更加符合目标的实际机动状况.根据卡尔曼滤波残差是否符合零均值正态分布,判断目标机动频率是否发生改变,并采用简化的最小均方误差(LMS)算法对机动频率加以自适应调整.仿真实验表明,通过对频率自适应调整,使机动目标的位置、速度估计误差明显减小.     

引信近场目标特性集成仿真系统设计

通过对引信近场特性仿真系统的可行性研究和系统需求分析,建立了集成化系统的功能框架,并基于系统框架完成了仿真系统总体设计;在分析仿真系统对数据库的需求基础上,完成了目标特性数据库的设计;在系统功能实现流程图的基础上,通过中间接口软件设计实现了数据库与通用电路仿真软件的集成,从而实现电引信的电路级仿真.     

“目标教学”在高校体育课程改革中的应用——公体排球教学中的实验研究

通过在普通高校公体排球教学中运用“目标教学”理论,结合高校体育教学的实际,从课时具体目标入手,发挥教学目标的导向、激励作用,注重情感素材的挖掘、积极情绪的调动,推动了学生知识、技能的掌握和提高,收到了事半功倍的教学效果.     

一种间断观测下的无人机地面目标跟踪方法

提出了一种基于贝叶斯滤波器和适航地图的跟踪算法(BF-Hmap),解决间断观测下的无人机地面目标跟踪问题.采用基于中心线和梯度图的快速道路提取算法生成目标适航地图,该图描述了地面目标与当前地形相关的运动能力.采用贝叶斯滤波器分两步在线更新目标状态的后验概率分布,即在预测阶段考虑适航地图对目标运动的约束,以及在估计阶段充分利用目标的所有观测信息.仿真结果表明,在间断观测下该算法对地面机动目标有着良好的跟踪效果.     

雷达目标微动特性研究

 雷达目标微动特性是当前目标探测与识别领域的新兴研究方向和热点课题,随着近10年的发展积累了一些研究成果。本文重点综述了微动目标雷达回波调制效应、微动特征提取、微动目标雷达成像、微动特性测量及雷达波形设计等方面的研究成果,部分成果已应用于空间/空中目标探测与识别等领域。本文的研究成果及结论为进一步推动国内微动特性研究提供参考和基础。     

Characteristics of strontium isotopes and their implications in the Qixing Cave of Guizhou,China

The strontium isotopic compositions (87Sr/86Sr) of samples including soils, bedrock, soil waters, drip waters and their corresponding speleothems in the Qixing Cave (QXC), Guizhou Province, China, were systemically measured and analyzed. The results indicate that there are significant Sr isotopic differences among samples. The mean 87Sr/86Sr ratios in drip water for the samples 1#, 4# and 9# were 0.709568, 0.709139 and 0.708761, respectively, which possibly result from different flow paths, residence times, and other hydrogeological processes in the unsaturated zone overlying QXC. Meanwhile, levels of 40.8%, 57.6% and 72.4% of Sr in drip waters for 1#, 4# and 9#, respectively, were derived from bedrock dissolution, which was calculated by the mixture model of the two end-members (soil and bedrock). There is, however, no positive correlation between the relative proportion from bedrock dissolution (δ13C value is 1.8‰) and drip water δ13CDIC values. The mean drip water δ13CDIC value in 1# is the heaviest (–4.5‰) with the lowest contribution rate of bedrock dissolution, whereas the value in 9# is the lightest (–9.3‰) with the highest contribution rate of bedrock dissolution. The proportion from host rock dissolution in 4# is higher than that in 1# and lower than that in 9#, while its mean drip water δ13CDIC value (–8.6‰) is higher than that of 9# and lower than that for 1#. This suggests that the prior calcite precipitation (PCP) processes in the unsaturated zone overlying the cave are responsible for the δ13CDIC value differences between different drip waters, and not bedrock dissolution. Furthermore, this study also demonstrates that the 87Sr/86Sr ratios of speleothems in the 1# and 4# mainly reflect the variation in the relative proportions from the soil system (soil water) and bedrock dissolution overlying the cave. It is, therefore, feasible to use the strontium isotopic signals of speleothems as an indicator for soil chemical weathering intensity, and consequently as a monsoon proxy in the study area.     

多摄像头目标跟踪动态单应投影方法研究

动态单应投影变换算法利用各个摄像头之间的相对位置参数,并基于文中所给出的光轴辅助坐标变换方法,可以快速地计算出各个视角间单应变换矩阵的参数,通过该变换可以实现各视角图像间的快速投影.这种快速投影变换方法不需要通过匹配视角间图像的像素点对来计算单应矩阵参数,而是直接利用摄像头内部固定参数和外部相对位置参数快速计算视角间图...