摘要：面对大学英语语译义翻译短板,设计大学英语语译义翻译能力线上线下混合式培训平台,为大学生提升英语能力提供最佳性能平台。基于MOOC的培训模式,建立由前端模块、培训模块、评价模块组成的线上线下混合式培训平台,基于IEEE1484标准体系的网络资源管理系统,以LT-SR为平台管理教学资源,以思维引导作为平台核心,协调各模块作用,利用基于模糊聚类的协同推荐算法为大学生推荐相关个性化教学资源,培训和提升大学英语语译义翻译能力。测试结果表明:平台检索最短耗时仅为1.1 s,反应速度快;主动交互曲线与被动交互曲线波动幅度大,且重合度较高,交互性能强。

摘要：为了全面模拟对抗性人群行为,控制策略的效能评估是必不可少的.建立群体控制的媒介干预模型,通过引入社会不满模型和情绪模型,揭示媒介干预下个体行为由聚集到逃离的心理机制和行为规律.在粒子群算法中对粒子个体受力分析,仿真结果能够体现控制策略与控制效果的关系.参数分析表明,媒介属性与驱散率呈正比;媒介放置队形中间位置,驱散率大于两侧位置;个性特征值越大驱散率越低.最后设计仿真实验,验证建立模型的有效性.模型可以对群体控制策略进行效能评估,为控制人群提供一定决策支持.

摘要：ICESat-2作为新一代多波束激光测高卫星采用了光子计数体制,其探测数据中存在大量噪声,造成光子数据在轨处理和传输时面临巨大挑战。为了在轨高效地对原始探测数据进行去噪处理,以降低星地传输数据量,本文设计了一种基于原始探测光子泊松分布特性的直方图去噪算法。该算法分为光子点云的垂直直方图化和倾斜直方图化。首先,根据光子传输距离将点云数据段划分为二维格网形成垂直直方图,利用直方图箱光子数的均值和标准差计算信噪分离阈值,并对信号光子赋予低、中和高置信度标签来表征信号可靠性;其次,对识别的中、高置信度光子进行线性拟合获取坡度信息,将光子传输距离投影到沿坡面垂直的方向形成倾斜直方图,进行二次信号光子识别且合并置信度标签;最后,对噪声光子进行剔除以实现原始数据的压缩下传。同时,本文对比研究了基于密度的空间聚类应用(Density-Based Spatial Clustering of Applications with Noise,DBSCAN)算法和对点排序以识别聚类结构(Ordering Points to Identify the Clustering Structure,OPTICS)算法性能。通过8种地类的ATL02数据开展测试实验,结果表明,DBSCAN算法会导致信号光子丢失,而OPTICS算法会产生虚假信号簇,相比之下,直方图算法有效避免了这些问题的产生,并且在实验中对不同地类具有较好的稳健性和适应性。在直方图算法中,垂直直方图算法对信号光子召回率R均为1,查准率P和调和F值平均在0.90以上,相较于垂直+倾斜直方图、DBSCAN和OPTICS的运行效率分别达到12倍、3473倍和1528倍以上,平均运行时间仅0.048 s,可高效实现数据去噪。垂直直方图算法去噪结果初步满足在轨处理效率要求(<0.25 s),本文有望为未来星载光子计数激光雷达数据的在轨去噪提供技术参考。

摘要：针对低影响开发(liD)雨水系统建设中存在成本与效益难以平衡的问题,选取甘肃省天水市某居住小区为研究对象,构建InfoWorks ICM一、二维耦合模型,以不同liD组合方案在不同降雨重现期下的径流总量控制率、径流峰值削减率、积水面积削减率、积水量削减率、固体悬浮物(SS)削减率、化学需氧量(COD)削减率为效益表征量,结合liD设施的生命周期成本定量分析成本效益。结果表明:包含绿色屋顶的liD组合方案成本效益偏低,但对于高重现期降雨具有较强的适应能力,更适用于暴雨频发地区;liD组合方案对于积水面积削减率与积水量削减率的成本效益较高,能有效缓解内涝积水,对于COD削减率的成本效益较低,需进一步优化;雨水桶+生物滞留设施+透水铺装作为总成本效益最高的方案,更适用于研究区域liD雨水系统的建设。研究成果对liD雨水系统的优化设计具有重要参考意义。

摘要：正交异性钢桥面板疲劳开裂显著影响钢桥的服役性能,其加固处治问题是工程界近年来高度关注的热点问题。对钢桥面板结构疲劳开裂加固处治的发展状况进行了分析总结,重点剖析了加固处治的关键问题和未来发展方向。结果表明:多开裂模式是钢桥面板结构疲劳问题的基本属性,加固处治方法的适用性和强化效应与开裂模式、裂纹扩展特性、裂纹长度等因素密切相关;以装配式加固处治法为代表的多类加固处治方法,通过加固件与开裂结构形成协同受力体系改变裂纹局部区域的受力特性,从而实现性能强化和延寿,加固体系中含有既有疲劳裂纹和已有一定损伤累积的未开裂模式,引入装配件或局部补强将产生新的疲劳易损部位和开裂模式,其疲劳开裂模式相较于加固前更多样、更复杂;加固前各开裂模式的损伤状态、加固体系的受力特性与开裂模式、及其剩余寿命预测等关键问题,是钢桥面板结构疲劳开裂加固处治研究的重要基础;在役钢桥面板结构的实际损伤状态评估及损伤重构方法、加固体系的剩余寿命预测和基于加固体系剩余寿命的加固设计是迫切需要解决的重要研究课题;基于功能材料的加固处治新方法和重度疲劳开裂的综合加固处治法是亟待突破的重要研究课题。

摘要：Long-time driving and monotonous visual environment increase the safety risk of driving in an extra-long tunnel. Driving fatigue can be effectively relieved by setting the visual fatigue relief zone in the tunnel. However, the setting form of visual fatigue relief zone, such as its length and location, is difficult to be designed and quantified. By integrating virtual reality(VR) apparatus with wearable electroencephalogram(EEG)-based devices, a hybrid method was proposed in this study to assist analyzers to formulate the layout of visual fatigue relief zone in the extra-long *** virtual environment of this study was based on an 11.5 km extra-long tunnel located in Yunnan Province in *** results indicated that the use of natural landscape decoration inside the tunnel could improve driving fatigue with the growth rate of attention of the driver increased by more than 20%. The accumulation of driving fatigue had a negative effect on the fatigue relief. The results demonstrated that the optimal location of the fatigue relief zone was at the place where driving fatigue had just occurred rather than at the place where a certain amount of driving fatigue had accumulated.

摘要：Salt stress is a vital factor limiting nitrogen uptake and cotton growth in arid *** mechanisms underlying salt stress tolerance in cotton plants under high soil salinity have not been fully ***,the aim of this study was to examine the proportion and mechanism of cotton nitrogen uptake under salt stress using the^(15)N isotope labeling *** plants were grown in four undisturbed saline soils(1,3,6 and 9 dS m^(-1)),and the experiment was designed using the ENVIRO-GRO(E-G)*** results showed that the dry matter of roots,stems and leaves of the cotton parts in slightly saline soil(C2,3 dS m^(-1))was not significant compared with the non-saline soil(C1,1 dS m^(-1)).The cotton fruit grown in low-salinity soil(C2,3 dS m^(-1))had significantly higher dry matter than that grown in the other treatments,implying that cotton plants grown in 3 dS m^(-1)soil have the best nitrogen uptake and salt *** plants grown in weakly(C3,6 dS m^(-1))and moderately(C4,9 dS m^(-1))saline soils exhibited premature *** distribution of total nitrogen and nitrate content in cotton was the best explanatory variable of total^(15)N recovery,of which cotton^(15)N recovery was between 26.1%and 47.2%,and soil^(15)N recovery was between 7.7%and 14.9%.Our findings provide guidance for further exploitation and utilization of saline soil resources and sustainable development of the agricultural soil ecosystem in arid regions.

摘要：目前,我国农村生活污水总体治理水平较低,污水处理设施普遍存在“重建设、轻运维”的现象,导致站点和管网运行故障率高、设施规模不符合实际污水量、设施进出水水质不达标等问题。从全生命周期来看,农村生活污水治理项目设计应重点关注村庄常住人口数量,合理划分村庄类型、选择治理模式并控制户均投资,同时对水量预测、污水管网、处理工艺、污泥处置和智慧管控等方面进行比较。结合苏州市吴江区农村生活污水治理项目,分析农村生活污水治理项目策划重点和设计要点,为长江三角洲农村生活污水治理项目的策划和设计提供参考。

摘要：This work proposed a strategy of indirectly inducing uniform microarc discharge by controlling the content and distribution ofβ-Mg_(17)Al_(12)phase in AZ91D Mg *** kinds of nano-particles(ZrO_(2)and TiO_(2))were designed to be added into the substrate of Mg alloy by friction stir processing(FSP).Then,Mg alloy sample designed with different precipitated morphology ofβ-Mg_(17)Al_(12)phase was treated by microarc oxidation(MAO)in Na_(3)PO_(4)/*** characteristics and performance of the MAO coating was analyzed using scanning electron microscopy(SEM),energy dispersive spectrometer(EDS),X-ray diffraction(XRD),X-ray photoelectron spectroscopy(XPS),contact angle meter,and potentiodynamic *** was found that the coarseα-Mg grains in extruded AZ91D Mg alloy were refined by FSP,and theβ-Mg_(17)Al_(12)phase with reticular structure was broken and *** nano-ZrO_(2)particles were pinned at the grain boundary by FSP,which refined theα-Mg grain and promoted the precipitation ofβ-Mg_(17)Al_(12)phase in *** effectively inhibited the“cascade”phenomenon of microarcs,which induced the uniform distribution of discharge *** MAO coating on Zr-FSP sample had good wettability and corrosion ***,TiO_(2)particles were hardly detected in the coating on TiFSP sample.

摘要：提出一种置信度模型,量化判别三元组的准确度。该模型包含3个方面:知识表示中的实体强度关联计算;语义识别中的长尾特征计算;实体环境结构评估的置信度计算。最终目标是利用置信度检测知识图中存在的长尾噪声。在真实世界数据集FB15K上,实验验证了噪音数据集构造的合理性。长尾噪音检测实验中,验证了该模型的优越性。在阈值实验中,其噪音识别准确率稳定在90%以上。实验结果表明,与其它模型相比,该模型取得了显著且一致的改进。