A Progressive Line Simplification Algorithm

An application of line simplification considering spatial knowledge is described.A method for identifying potential conflict regions,in order to avoid the self_intersection of generalized lines,is also discussed.Furthermore,a new progressive line simplification algorithm is presented.From the view point of spatial cognition,a spatial hierarchical structure is proposed,and its application to construction of spatial knowledge related to a line is explained.

Genetic and Breeding Progress Analysis on Five Pure Lines of Dahen Broiler

To timely modify breeding scheme and improve selection efficiency of Dahen broiler, genetic and breeding progress analysis on five pure lines was conducted. The results showed that the selection on breeding goal traits of each line was effective since 14 generations, especially the selection on growth traits did not cause adverse influence on reproductive performance. After the 6^ th generation, main performances of each line maintained in higher level, but the breeding progress obviously declined. It illustrated that current breeding means was effective for maintaining and consolidating breeding goal traits of Dahen broiler, and it should timely adjust breeding scheme to obtain more genetic progress.

Genetic and Breeding Progress Analysis on S06M Line of Dahen Broiler

The genetic and breeding progress of Dahen S06M line was analyzed, in order to improve the selection efficiency. The results showedthat six generations of selection was effective in selecting main characters of S06M line, especially the selection of growth rate had no adverse effecton reproductive performance. All indicators of reproductive performance were improved in varying degrees during breeding, particularly the egg production at 68 weeks of age. The breeding progress of main target traits significantly slowed down after the second generation, but they still maintained at higher levels and the characters of S06M tended to be stable.

Progress Down the Line

WORK is well underway on a study by Chinese experts to identify and rectify technical and managerial troubles bedeviling the legend- ary Tanzania-Zambia Railway Authority （TAZARA）. Originally completed in 1975, and financed and built by China, the line is cur- rently facing imminent collapse due to mismanagement, financial difficulties and inadequate maintenance.

A remarkable progress in breeding new rice line through gene engineering

Much progress has been made in the research of breeding new rice line through gene engineering by Life Science College of Fudan Univ, Shanghai, and the Plant Science Res Inst of Shanghai Acad of Agri. It was the first time internationally that the research adopted a man-combined gene, taking agrobacterium as car-

考虑双线相互干涉的铁路项目施工组织研究

针对线状活动铁路工程施工场景,在双线相互干涉条件下,基于线性计划方法,对双线的空间表达以施工区段为单位进行重构,建立时间-施工区段模型,考虑时间、空间、施工资源等约束,构建线路内部约束条件,再以线路内部约束为基础,建立线路间约束条件。结合标准遗传算法,以各条线路各区段内施工资源配置情况为自变量,构建双线相互干涉条件下铁路工程施工进度计划工期优化算法,能够在算法中自动输出最优工期条件下的资源配置情况,根据算法输出的最优工期和资源配置情况制作对应的线性计划图。算例仿真结果表明,工期优化模型和算法能够高效获得最短工期下双线相互干涉的铁路项目施工进度计划,验证了本文模型的合理性和算法的有效性。

Efficacy and Safety of Continuing Bevacizumab beyond Disease Progression plus Docetaxel in Patients with Non-Small Cell Lung Cancer: A Retrospective Analysis

Background: Bevacizumab-based chemotherapy has been shown to extend progression-free survival (PFS) of lung cancer, but its effect on overall survival (OS) remains unclear. However, bevacizumab beyond disease progression (BBP) significantly improved OS in patients with metastatic colorectal cancer. Methods: Therefore, we retrospectively analysed 22 patients with non-small cell lung cancer (NSCLC) who were treated with docetaxel plus BBP at the Department of Thoracic Oncology, Kansai Medical University Hirakata Hospital, between November 2009 and March 2013. Results: The response rate was 31.8% and the disease control rate was 86.4%. The median PFS was 4.5 months (95% confidence interval [CI], 2.5 - 8.7 months) and the median OS was 17.2 months (95% CI, 8.5 - 25.9 months). Grade 3 and 4 adverse events included leukocytopenia (68.2%), neutropenia (77.3%), fatigue (9.1%), proteinuria (9.1%), febrile neutropenia (4.5%), anemia (4.5%), and anorexia (4.5%). Conclusion: Docetaxel plus BBP was found to be generally well tolerated and effective.

Modeling of Lightning Shielding Failure in UHV Transmission Line Based on Randomness Theory

The operation data obtained abroad indicates that shielding failure in UHV transmission lines mostly accounts for the tripping-out accidents introduced by lightning striking the transmission line.Based on the discharge theories of long air gap and randomness theory,a leader progression model of lightning shielding failure is presented in this paper.The random characteristics of the downward and upward leader are simulated in this model.The ground slope angel is also considered in this model by using coordinate transformation.Moreover,the system voltage is also taken into consideration in this model.The simulation results show that the good agreement between this model and the field data.And the results suggest that return striking exist obviously in UHV transmission line.

一种L~U波段RF MEMS单刀十掷开关的设计

论文提出了一种适用于1GHz~60GHz频段的RF MEMS单刀十掷开关。该开关采用三角形上电极结构,以减小悬臂梁等效弹性系数和闭合接触面积,达到低驱动电压、高隔离度的目的。通过渐进传输线结构,改善阶跃补偿引起的信号损耗问题。仿真结果显示:该单刀十掷开关的驱动电压为13V,在1GHz~60GHz频段范围内,输入端两侧输出端口的插入损耗<2dB,其余八个端口插入损耗≤0.59dB,所有端口隔离度均>30dB。此开关可适用于无线通信系统、雷达系统和仪器测量系统等对射频性能要求高的领域内。

基于高阶Bezier曲线的渐进多焦点镜片设计

采用直接法设计渐近多焦镜片时,子午线上的光焦度分布是控制远用区,近用区和通道大小的关键。以高阶多项式为代表的子午线光焦度分布函数无法有效控制各个眼用区域附近的光焦度变化速率,导致镜片个性化设计的灵活性不高。为解决这一问题,文章引入了一个高阶Bezier函数来描述期望的子午线光焦度分布,在子午线眼用区域附近添加多个曲线控制点,通过改变控制点位置来调节对应区域光焦度变化速率,以实现对镜片光焦度和像散分布的个性化控制。通过计算仿真、面型分析软件验证和实际加工测量分析可知,设计的四款渐进多焦点镜片在满足佩戴用途的同时具有较低的像散极值和宽阔的光焦度稳定区域,展现Bezier曲线的高可塑性。方法具有子午线灵活可调的能力,能有效控制关键区域的设计、位置、远视区域、近视区域和通道区域的大小,为个性化设计抗疲劳、办公室和驾驶等场景渐进多焦点眼镜展示了一种有效的方法。

设计类专业课程思政教学范式研究――以“橱窗设计”课程为例

通过对设计类专业课程思政现状的分析,发现课程思政实施中的难点及存在的问题,在此基础上,根据设计类专业课程特点和行业发展的新需求,将德育与美育有机结合进专业课程教学,提出了“点线结合,渐次升华”的课程思政教学范式,并以《橱窗设计》课程为例,从课程思政目标确定、课程内容重构与思政元素提炼、教学实施设计、课程评价等方面,探索了设计类专业课程思政教学体系的构建和实施。

基于车载激光扫描点云数据的道路边线提取方法研究

为了在移动车载激光扫描点云数据中尽可能完整准确地提取道路边线,本文根据道路边界在点云场景中分布特征,提出了一种自动化的道路边线提取方法。首先,为消除无用点对道路边线提取的影响,在原始渐进式形态学滤波算法的基础上提出了一种改进的点云滤波算法,用于非地面点滤波,从而提高了点云滤波的运算效率和精度;其次,将地面点投影至二维图像上,并通过直线段检测算法(LSD)得到道路边线直线段;最后,通过直线连接和直线特征匹配实现最终的道路边线提取。通过对两组道路点云数据进行算法验证,结果表明,本文算法提取道路边线的完整率、准确率以及F-Measure均达到90%以上,验证了本文方法的有效性与适应性。

软件项目进度控制方法研究

为优化软件项目进度控制过程,使管理者能够对软件项目进度进行有效的跟踪和调整,研究并比较了主要的项目进度控制方法和技术,对甘特图、网络计划技术、关键链技术,对各技术的原理、适用范围、优缺点等进行了分析。为弥补上述技术的不足,引入工业项目进度控制方法——实际进度前锋线法,增强了对软件项目进度的信息统计和工期预测功能。通过对上述几种技术的改进和综合应用,提出了一个高效便捷的进度控制系统的设计方案。

减小地线保护角对改善线路防雷性能的效果

雷电绕击是影响高压输电线路安全稳定运行的关键因素之一,减少地线保护角是降低绕击跳闸率的重要手段。为此,介绍了基于先导发展模型的超高压线路雷电绕击跳闸率分析方法,利用该方法对不同地形条件下各种塔型减小保护角对改善线路防雷性能的效果进行计算和对比,提出减小保护角的改造方案,对杆塔的力学性能进行校核,评估了减小保护角的经济费用,对比了减小保护角与其他防雷措施的技术经济性。研究表明,绕击跳闸率与塔型和地形关系密切,一般来说同一塔型保护角越小绕击跳闸率也越小,但不同塔型相同保护角跳闸率差异可能很大;减小保护角对改善线路防雷性能的效果受地形影响明显;对比不同防雷措施的效果和成本可见,将地线水平宽度增加对改善跳闸率的综合效果较好。

样品前处理与色谱在线分析技术研究进展

色谱技术是目前应用最为广泛的分离分析技术,而传统色谱分析方法中样品采集、样品前处理、色谱分析3个步骤各自独立,使分析过程耗时、耗力、耗试剂,容易造成目标物损失而产生误差。色谱在线分析技术是在线实现样品的前处理及分析过程,可有效解决上述不足,已成为分析化学的前沿课题。该文讨论了在线色谱分析方法的设计及相关联用技术,综述了在线色谱分析技术的最新进展。

籼型杂交水稻恢复系选育研究进展

我国籼型恢复系的选育经历了两个发展阶段：（１）测交筛选恢复系；（２）测交筛选和人工制恢等多途径选育恢复系。目前，早、中熟恢复系选育取得一定进展，而迟熟恢复系选育仍处于徘徊，这是由于所用亲缘相近，遗传基础相似所致，因而提出了采用亲缘渐渗，拓展恢复系的遗传基础，培育超高产组合的技术对策。

考虑缓冲区配置的生产线布局优化设计

将启发式遗传算法和空间填充曲线(SFC)相结合,以包括在制品(WIP)持有费用、缓冲区配置费用和物料搬运费用的总费用最小化为目标,对缓冲区配置进行生产线布局优化设计.通过对某柴油发动机缸体加工生产线实例分析,验证了设计的有效性和先进性.

科技进步在交通运输中作用的定量测度方法研究

强调科技进步在交通运输企业中的重要作用,研究生产函数产生的前提条件,提出一个非线性生产函数,论述该非线性生产函数的合理性,给出一个计算科技进步的具体实例,并对计算的结果进行试算和分析。