摘要：针对氨动力CO_(2)运输船液氨冷能浪费和BOG再液化处理功耗大的问题,提出一种利用液氨冷能的BOG再液化系统。以5万m^(3)CO_(2)运输船为研究对象,在不同船舶主机工况和环境温度下,利用HYSYS软件建立系统并模拟流程,开展系统效率和功耗计算,并与现有技术系统的功耗进行对比分析。结果表明,在船舶75%工况和环境温度为35℃时,利用液氨冷能的系统效率最大能达到73.5%;在船舶85%工况和环境温度为25℃时,该系统相较现有技术系统最多可以节约43.3%的船舶电力消耗。研究结果可为氨动力CO_(2)船BOG再液化系统优化设计提供一定的技术参考。

摘要：The Competition for Authenticated Encryption: Security, Applicability, and Robustness(CAESAR)supported by the National Institute of Standards and Technology(NIST) is an ongoing project calling for submissions of authenticated encryption(AE) schemes. The competition itself aims at enhancing both the design of AE schemes and related analysis. The design goal is to pursue new AE schemes that are more secure than advanced encryption standard with Galois/counter mode(AES-GCM) and can simultaneously achieve three design aspects: security,applicability, and robustness. The competition has a total of three rounds and the last round is approaching the end in 2018. In this survey paper, we first introduce the requirements of the proposed design and the progress of candidate screening in the CAESAR competition. Second, the candidate AE schemes in the final round are classified according to their design structures and encryption modes. Third, comprehensive performance and security evaluations are conducted on these candidates. Finally, the research trends of design and analysis of AE for the future are discussed.

摘要：Intracellular pH plays a significant role in various biological processes, including cell proliferation,apoptosis, metabolism, enzyme activity and homeostasis. In this work, a novel design strategy for the preparation of pH responsive carbon dots(CDs-pH) for ratiometric intracellular imaging was reported. By using SciFinder database, fluorescent CDs-pH with the required p Kavalue of 6.84 were rationally designed, which is vital important for precise sensing of intracellular pH. As a result, the synthesized CDspH demonstrated robust ability to test pH fluctuations within the physiological range of 5.4-7.4. The CDspH was further utilized for fluorescent ratiometric imaging of pH in living HeLa cells, effectively avoided the influence of autofluorescence from native cellular species. Moreover, real-time monitoring of intracellular pH fluctuation under heat shock was successfully realized. This SciFinder-guided design strategy is simple and flexible, which has a great potential to be used for the development of other types of CDs for various applications.

摘要：目的观察蒲地蓝消炎口服液治疗湿热蕴结证中度寻常痤疮的有效性和安全性。方法采取多中心随机双盲对照研究设计,选取5家中心,筛选240例湿热蕴结证中度寻常痤疮受试者,随机分为试验组和对照组,每组各120例;试验组给予蒲地蓝消炎口服液,对照组给予蒲地蓝消炎口服液模拟剂;两组均联合外用克林霉素磷酸酯凝胶,每天2次,洁面后涂于患处。治疗4周,比较两组治疗前后皮损(丘疹、脓疱、粉刺)数量以及中医证候(面红、皮疹痒痛、舌苔厚腻、尿黄、便秘)积分变化,记录不良反应。结果229例受试者完成试验,其中试验组117例、对照组112例。与基线相比,用药4周的两组患者的丘疹计数、脓疱计数显著减少,试验组粉刺计数和中医证候积分显著减少,且试验组均优于对照组(P<0.05)。试验组痤疮皮损改善有效率为87.2%,高于对照组的58.0%(P<0.05)。试验组仅1例患者出现外用药膏刺激性反应。结论蒲地蓝消炎口服液可有效改善湿热蕴结证中度寻常痤疮患者皮损数量及中医证候,值得临床推广应用。

摘要：随着互联网普及率提高,在线视频平台数量快速增长,平台之间的竞争也变得更加激烈。平台用户接入策略的变化是影响双边市场运营效率的关键因素。针对具有典型双边市场特征的在线视频行业,构建平台、内容商和广告商之间的行为博弈模型,对比分析内容商选择"全网独播"和"多平台上线"接入策略时的平台定价水平和广告投入量,最终提出不同平台接入策略的市场条件。研究发现:相比于"全网独播"策略,如果消费者有着较高的广告厌恶倾向,那么"多平台上线"策略下的观看价格更低,而广告投放量更多;"多平台上线"策略能够提高市场总需求,当平台差异性较小时,会降低单个平台的利润水平;消费者广告厌恶系数、单位广告价格、平台的差异性将共同影响内容商的平台接入策略。在线视频行业中各参与主体的运作决策受不同市场因素的影响,内容商应充分考虑现实的市场条件来选择最优接入策略。

摘要：采用了多学科设计优化方法,根据涡流理论建立了倾转旋翼桨叶空气动力学分析模型,利用CATIA,ANSYS和ADAMS等软件分析倾转旋翼桨叶结构动力学特性,采用iSIGHT多学科设计优化软件集成空气动力学和结构动力学分析模型,建立起倾转旋翼桨叶空气动力学/结构动力学多学科设计优化系统,进行多学科设计优化研究.并以倾转旋翼机XV-15的桨叶为算例,进行设计优化,结果表明提出的倾转旋翼桨叶空气动力学/结构动力学多学科设计优化方法是可行和有效的.

摘要：针对内蒙古某燃煤电厂的超低含水量高填方湿陷性黄土地基的强夯处理技术展开讨论,根据黄土的性质和回填的情况,结合强夯后的效果检测,分析不同强夯参数对处理效果的影响。

摘要：新时代背景下,文化构成有了巨大变化,人们也已意识到视觉艺术时代已是必然之趋,对于此备受艺术传播影响的社会现实,大众在探讨公共文化景观的同时,也开始更为关注本土文化和视觉艺术的性质,主要原因以城市为核心的视觉文化,无论是景观或人们行为展示,都是公共文化景观的要素。深究起来,城市文化包含公共景观、本土文化、视觉艺术三者,任何一方都是不可缺少的,三者的融合才可打造出更耀眼的公共文化景观,对本土文化传承与创新也非常有利。

摘要：We investigated the hydrolysis of TiⅣ along with naturally abundant AlⅢ ions and reported the formation of a stable and semiconducting nanocluster. Interestingly, this compound exhibits an unusual odd-membered ring structure and also represents the largest Al-containing polyoxotitanium cluster(PTC) observed thus far. The presence of a shell of organic ligands as well as the incorporation of hetero-AlⅢ ions endowed the nanocluster with high air, thermal, and pH stabilities. The present compound exhibited a record photocatalytic hydrogen evolution of 402.88 μmol g–1 h–1 among PTC materials. This work not only paves the way towards stable PTC materials but also provides new insights into the design of novel photocatalysts.

摘要：目的:工业的不断发展对航空发动机、泵、燃气轮机等旋转机械的动力性能提出了更高的要求。转子系统是旋转机械的重要组成部分。复杂的转子系统在高速运转时会产生故障和非线性振动,从而影响系统的可靠性。因此,开展转子系统的非线性动力性研究,研究转子系统在高速运转时的非线性响应及其抑制作用对转子系统的设计和故障诊断具有重要的意义。创新点:1.在建模的时候考虑转子系统的实际结构,在不对中模型中引入齿式联轴器啮合力,在滚动轴承模型中考虑弹流润滑影响;2.探究挤压油膜阻尼器参数对转子系统非线性特性抑制的影响,总结其变化规律。方法:1.基于Hertz接触和弹流润滑理论,建立滚动轴承动力学模型,同时考虑齿式联轴器齿之间的啮合力,建立不对中故障下的齿式联轴器啮合力模型,并在此基础上,根据转子系统的支撑形式,建立0-2-1支撑的转子动力学模型;2.开展转子动力学实验,验证模型的准确性并分析不对中量对系统频谱特性的影响;3.在分析不对中故障非线性特性的基础上,研究挤压油膜阻尼器参数对于非线性特性抑制的作用。结论:1.齿式联轴器啮合作用和滚动轴承的弹流润滑对不对中故障下转子系统的失稳产生一定的影响,润滑会导致系统发生分岔的窗口推迟;2.对于转子系统的弹性支撑,其一阶临界转速和振幅随着刚度的增大而增大,选择合适的刚度有利于转子系统的稳定运行;3.挤压油膜阻尼器的参数对转子系统故障引起的非线性具有较好的抑制作用,其作用的大小取决于不对中量和挤压油膜阻尼器的油膜间隙的耦合,合理地调节油膜间隙有助于增大系统的稳定区间范围。