摘要：与基于力、基于位移及基于能量的设计方法相比,基于损伤的结构抗震设计方法能够更全面直接地确定或评估结构抗震性能。由于缺乏消能部件附加等效阻尼比与主体结构损伤程度之间的关系表征,目前基于损伤的减震结构性能设计方法只能通过消能器设计参数的迭代调整分析实现预期损伤。针对以上不足,从能量耗散角度剖析了减震结构主体部分损伤机理,通过弹塑性耗能差率损伤模型建立减震结构附加等效阻尼比与损伤指数之间的定量关系,并提出消能部件在地震动下的动态附加等效阻尼比计算方法。在此基础上结合地震易损性分析方法提出面向损伤控制的减震结构体系性能设计流程。通过算例表明阻尼比解析计算准确,该流程具有通用简便、不需迭代等优点,能够将主体结构的损伤程度有效控制至预期损伤目标。该方法也可以兼容基于位移的设计方法,且具有更严格的概率统计意义。

摘要：介绍了蒙皮涂层耐沾污性的影响因素以及无光蒙皮面漆耐沾污的难点。对比了丙烯酸树脂体系无光、半光、高光漆膜的耐沾污性,并研究了氟碳树脂的添加量对无光漆膜耐沾污性的影响。结果表明:无光丙烯酸树脂体系的漆膜因消光粉添加量高,其表面粗糙度大,导致耐沾污性较差;在丙烯酸树脂体系中加入氟碳树脂,可提高无光漆膜的耐沾污性;且当丙烯酸树脂与氟碳树脂的比例接近1:1时,既能满所需的性能要求,又能降低成本。

摘要：目的在乡村振兴战略背景下,研究农产品包装健康生态设计的发展现状和策略。方法通过问卷调查法和数据调研法等,分析农产品包装健康生态设计对于乡村振兴的必要性;运用文献分析法与网络调研法,从理论层和实践层两个方面了解农产品包装健康生态设计的发展现状,针对当前农产品包装设计存在的问题,提出解决方法;结合农产品的特点,从健康生态理念的物质层、意识层、体验层三个维度,探索农产品包装健康生态设计的路径模式,提出具体的设计策略,并以山海关大樱桃为例进行包装设计实践。结论将健康生态理念融入农产品包装设计中,从消费情景、生命周期、地域文化三个维度赋予农产品包装独特的识别性和文化内涵,满足消费者对个性和美的追求;以包装为媒介,传播地域文化与健康生态的生活方式,对促进乡村经济振兴与地域文化振兴具有重要的现实意义。

摘要：为了使BIM技术更好地服务于桥梁工程,基于CATIA软件,参照“骨架+模板”的建模思路,提出一种桥梁参数化智能建模方法与相应的技术路线。使用EKL语言提高构件模板的参数化能力与CATIA二次开发技术实现构件批量实例化功能,借助WPF框架研发参数化设计系统,打通了构件模板创建、构件设计、构件实例化的全流程。依托遵余高速公路湘江特大桥主桥,采用该参数化智能建模技术实现全桥BIM模型的参数化智能建模、三维可视化展示和数字化交付,验证了该技术的可行性以及工程适用性,为BIM在桥梁工程中运用及发展提供参考。

摘要：Two new binary near-azeotropic mixtures named M1 and M2 were developed as the refrigerants of the high-temperature heat pump(HTHP).The experimental research was used to analyze and compare the performance of M1 and M2-based in the HTHP in different running *** results demonstrated the feasibility and reliability of M1 and M2 as new high-temperature ***,the exploration and analyses of the support vector machine(SVM)and back propagation(BP)neural network models were made to find a practical way to predict the performance of HTHP *** results showed that SVM-Linear,SVM-RBF and BP models shared the similar ability to predict the heat capacity and power input with high ***-RBF demonstrated better stability for coefficient of performance ***,the proposed SVM model was used to assess the potential of the M1 and *** results indicated that the HTHP system using M1 could produce heat at the temperature of 130°C with good performance.

摘要：In this paper, we theoretically and numerically study a combined monopole–dipole measurement mode to show its capability to overcome the issues encountered in conventional single-well imaging, i.e., the low signal-to-noise ratio of the reflections and azimuth ambiguity. First, the azimuth ambiguity, which exists extensively in conventional single-well imaging, is solved with an improved imaging procedure using combined monopole–dipole logging data in addition to conventional logging data. Furthermore, we demonstrate that the direct waves propagating along the boreholes with strong energy, can be effectively eliminated with the proposed combined monopole–dipole measurement mode. The reflections are therefore predominant in the combined monopole–dipole data even before the signals are filtered; thus, the reflections' arrival times in each receiver are identified, which may help minimize the difficulties in filtering conventional logging data. The optimized processing flow of the combined measurement mode logging image is given in this paper. The proposed combined monopole–dipole measurement mode may improve the accuracy of single-well imaging.

摘要："表演工作坊"相声剧所由诞生的特殊土壤,使其在叙事结构、角色设置等方面,体现出多元文化背景下现代台湾人身份认同的困境;在主题上则高度关切对中国文化传统的追寻与赓续,并在技术上实验多种传统艺术形式,以此作为从困境中突围的努力方向。台湾相声剧充分汲取民族艺术的养分,用现代剧场观念改造相声这一古老的说唱艺术,不仅开发了民间曲艺的现代潜力,而且出于对传统文化的自觉传承,充分借用古典文学的艺术手法开展技术革新,从而造就了一种超越于一般民俗艺术的文人化的高级艺术形态。

摘要：为探究SiC_(f)/SiC复合陶瓷与SiC陶瓷钎焊工艺性的差别,采用Ni基合金钎料在真空1400℃下保温10 min实现了SiC_(f)/SiC复合陶瓷与SiC陶瓷材料的真空钎焊连接,并针对焊后接头焊缝微观形貌特征对Ni基钎料进行成分优化,最终获得焊缝质量良好、SiC纤维损伤较小的SiC_(f)/SiC复合陶瓷真空钎焊连接接头。结果显示,SiC陶瓷和SiC_(f)/SiC复合陶瓷与钎料的反应机理相同,生成的反应产物没有差异。由于SiC_(f)/SiC复合陶瓷的结构特点,钎焊过程中钎料会在毛细作用下沿缝隙流失,并与SiC纤维发生反应造成纤维损伤。因此需降低钎料与SiC_(f)/SiC复合陶瓷的反应倾向,避免SiC纤维质量受损。所获结果可为针对SiC_(f)/SiC复合陶瓷连接的钎料成分及钎焊工艺设计提供试验参考。

摘要：A new circuit model for designing and manufacturing an S-band low noise amplifier(LNA) with the software,Advanced Design System(ADS),is introduced in this *** proposed model involves shunted impedance at the grid to achieve a stable LNA without measuring the S-parameters of transistors at low *** LNA was measured over the operation band of 2.2-2.3 GHz,which has input and output standing wave ratios below *** noise figure of the manufactured LNA was about 0.2 dB and the gain was above 22 dB,which indicated that our LNA worked well at 77 K.

摘要：Insulin is widely used in treating diabetes, but still needs to be administered by needle injection. This study investigated a new needle-free approach for insulin delivery. A portable powder needleless injection（PNI） device with an automatic mechanical unit was designed. Its efficiency in delivering insulin was evaluated in alloxan-induced diabetic rabbits. The skin irritation caused by the device was investigated and the results were analyzed in relation to aerodynamic parameters. Inorganic salt-carried insulin powders had hypoglycemic effects, while raw insulin powders were not effective when delivered by PNI, indicating that salt carriers play an important role in the delivery of insulin via PNI. The relative delivery efficiency of phosphate-carried insulin powder using the PNI device was 72.25%. A safety assessment test showed that three key factors（gas pressure, cylinder volume, and nozzle distance） were related to the amount of skin irritation caused by the PNI device. Optimized injection conditions caused minimal skin lesions and are safe to use in practice. The results suggest that PNI has promising prospects as a novel technology for delivering insulin and other biological drugs.