摘要：城市内涝是危害城市安全的重要灾害,传统城市主要通过建设大规模雨水管渠系统化解城市内涝问题,效果并不显著。而道路减排设施布设不科学、几何设计不合理是城市排水能力不高的主要因素,为有效预防城市内涝的发生,有必要以减少内涝为目的,对城市道路进行改造设计。因此,文章结合某城市重点发展项目道路改造实例,分析了通过改造道路降低内涝灾害的可行性方法,并采用SWMM软件模拟分析了道路改造前后排水效果变化,验证了本文所提出道路设计方式的可行性。

摘要：A construction method based on the p-plane to design high-girth quasi-cyclic low-density parity-check （QC-LDPC） codes is proposed. Firstly the good points in every line of the p-plane can be ascertained through filtering the bad points, because the designed parity-check matrixes using these points have the short cycles in Tanner graph of codes. Then one of the best points from the residual good points of every line in the p-plane will be found, respectively. The optimal point is also singled out according to the bit error rate （BER） performance of the QC-LDPC codes at last. Explicit necessary and sufficient conditions for the QC-LDPC codes to have no short cycles are presented which are in favor of removing the bad points in the p-plane. Since preventing the short cycles also prevents the small stopping sets, the proposed construction method also leads to QC-LDPC codes with a higher stopping distance.

摘要：作为中国共产党第二代中央领导集体的核心和改革开放的总设计师,邓小平在中国式现代化的开创发展中作出了重大贡献,发挥了不可替代的关键作用,产生了极为深远的历史影响。具体来说,就是通过首倡“中国式的现代化”,为中国式现代化奠定了理论和话语基础;科学设计“三步走”发展战略,为中国式现代化提供了战略支撑;系统制定现代化建设的相关策略,为中国式现代化指明了实践路径;科学阐述一系列重要原则,为中国式现代化提供了根本遵循。在新时代新征程上,要坚定不移地沿着邓小平开创的中国式现代化道路继续前进,奋力谱写全面建设社会主义现代化国家的新篇章。

摘要：大型超市在生鲜产品的储藏、售卖期,为防止设备故障对食品品质和安全造成影响,需对设备进行即时管理。针对超市冷冻设备和冷藏设备,文中为其定制了一套基于物联网的生鲜冷链设备监控解决方案。该系统通过对不同设备参数进行监测,并利用无线通信模块与云平台相结合,实现对超市冷链设备远程实时监测和管理。监控平台采用***开发,包括MySQL数据库和Web服务器,能够实现数据可视化,为用户提供直观的监控界面和数据分析功能。通过该系统,超市管理人员能够有效监测冷链设备运行状态,及时发现异常并采取措施,从而保障食品品质和安全,提高运营效率。

摘要：混合式有载分接开关的切换时序设计对其运行损耗、器件寿命与动作可靠性具有显著影响。本文以非对称星型混合式有载分接开关为研究对象,分析了该分接开关的工作状态与动作过程,构建分接开关切换过程数值仿真模型,进一步研究了非对称拓扑结构与初始相位差对正向与反向切换时序过程中损耗的影响。结果表明反向切换产生的过渡损耗小于正向切换。通过分析机械开关与半导体组件的动作误差及误差对切换过程的影响,合理设置切换动作缓冲区,提升切换可靠性。为了缩短切换过程持续时间、减小过渡电阻损耗,通过建立开关动作容限模型,对动作容错范围进行归一化整合处理,去除冗余开关裕量,对混合式有载分接开关的动作时序进行整体优化,提出具有高容错能力且切换时间更短的动作时序。上述研究对提升混合式有载分接开关动作可靠性与快速切换能力、减小电路损耗提供理论指导。

摘要：This study examines the effects of online teaching on student autonomous learning by using U-MOOCS during the period of COVID-19 *** participants were bachelor’s degree students in English Department taking“Business English and Communication”*** to learning practice were measured by designing a multi-link teaching model,including the periods before,during,and after the online *** study result reveals that the implementation of the proposed model for this course can not only fully mobilize students’learning enthusiasm,but also provide practical help for students’autonomous learning,which proves to be an effective teaching model.

摘要：Recent years have witnessed the growth of the popularity of open online learning platforms in China’s colleges and universities. This not only promotes the change of teaching concept and the reform of teaching methodology, but also provides a broad new opportunity for the teaching resource integration between universities in China and the prestigious universities in the world. However, with MOOC’s booming and spreading, educators and teachers have also found its limitations during the course of teaching and learning. This paper focuses on the design and the application of the integration of blended learning model and MOOC in Business English Course by selective use of the Open Course Ware of MIT Management School. With the advanced e-portfolio assessment as the standard for students’ achievement, it aims to reveal that the proposed model can trigger students’ study interest and cultivate their autonomous study, corporate learning as well as creative thinking ability.

摘要：In this paper, two AIE-active luminogens (Oxa-pTPE and Oxa-mTPE) constructed from tetraphenylethene and oxadiazole units were successfully synthesized and their thermal, optical and electronic properties were investigated. By linking TPE to the oxadiazole core through meta-or para-position, the intramolecular conjugation is effectively controlled. Thanks to the intelligent molecular design and specific AIE feature, when fabricated as emissive layers in non-doped OLEDs, they exhibit blue or deep-blue emission with CIE coordinates of (0.17, 0.23) and (0.15, 0.12), and good efficiencies with ηC, max and ηP, max up to 1.52 cd A-1 and 0.84 Im W-1 , shedding some light on the construction of deep-blue AIE fluorophores.

摘要：骨盆区域解剖结构复杂,骨盆肿瘤的起病通常较为隐匿,患者出现症状时肿瘤往往已侵袭较广,给骨盆肿瘤切除后的骨盆环重建带来了诸多挑战。3D打印定制半骨盆假体结合个性化截骨导板的应用,能够实现假体的精准植入,促进假体与骨界面的有效整合,并帮助患者早期下地活动和恢复功能。目前,全球范围内的多个肌肉骨骼肿瘤中心已自主开发用于骨盆重建的3D打印定制半骨盆假体,旨在改善患者的功能预后并降低术后并发症的发生率。然而,关于3D打印定制半骨盆假体的研究大多为单中心、回顾性研究,随访时间相对较短;此外,现有研究主要是基于个体经验的假体设计总结,缺乏统一的设计标准,导致假体设计理念、患者功能预后和并发症发生率之间存在较大差异。本文通过对相关文献的综合分析与比较,总结了3D打印定制半骨盆假体在骨肿瘤领域的应用优势及其局限性。

摘要：立足于印刷文化研究前沿的桑德罗·荣格称包含插图及若干印刷因素的文学文本为“混合文本”。他认为作家的文稿经由出版商的出版创意,加入绘工、刻工绘制的插图,再融入印刷、装帧等因素,最后进入流通的文本并非作家的原始文本,而是以作家文本为核心又融入多种因素的“混合文本”;“混合文本”经由翻译进入不同的文化界域后又成为具有跨文化因素的“混合文本”。桑德罗还认为,文学在生活中的传播绝不仅仅以“文本”的单一形态来实现,而是由多模态的“媒体”进行传播,这些“媒体”将文学文本的内容与结构转化为时空背景,成为读者生活和接受的一部分,即“文学日常”。