摘要：腐蚀环境中钢-混组合桥梁的栓钉连接件可能因腐蚀-疲劳耦合作用而劣化,为此设计制作3组10个栓钉推出试件,分别进行腐蚀后的静力、疲劳性能试验和腐蚀-疲劳耦合试验,研究栓钉的腐蚀-疲劳失效及力学性能退化机理。结果表明:腐蚀作用使得栓钉抗剪刚度显著退化;腐蚀-疲劳耦合作用下栓钉疲劳寿命明显低于腐蚀后疲劳寿命;栓钉初始疲劳裂纹产生于钉杆靠近焊趾截面的剪力作用侧,以剪切裂纹扩展为主,当疲劳裂纹或腐蚀疲劳裂纹发展至约1/2栓钉直径后,栓钉在拉-剪组合应力作用下断裂;影响栓钉损伤发展速率的主要因素为荷载比、腐蚀速率及腐蚀-疲劳耦合作用;腐蚀-疲劳耦合作用下栓钉抗剪刚度退化速度大于疲劳单独作用下,抗剪刚度退化包括快速退化和缓慢退化2个阶段,前一阶段约占栓钉腐蚀疲劳寿命的20%。

摘要：The research scope of Indian Ocean regional issues mainly includes the influence of the community of shared future for mankind on the foreign relations of Indian Ocean countries,a comparative study of Indian Ocean regional issues from the perspective of traditional Indian Ocean regional issues and think tanks,the influence of the vison of a community with a shared future for mankind on overseas Chinese community in the Indian Ocean island nation,and research paths in the Indian Ocean region from the perspective of think tanks,and so *** article focuses on the politics,economy and culture of the Indian Ocean countries,analyzes and summarizes the theoretical and practical significance of the study of the Indian Ocean region from the perspective of a community with a shared future for *** in-depth discussions on the docking status and challenges of the vison of a community with a shared future for mankind in the Indian Ocean island regions,we will promote the exchanges and mutual learning of civilizations and people-to-people bonds between China and the Indian Ocean region,and provide intellectual support for the construction of the Guangdong-Hong Kong-Macao Greater Bay Area,the construction of the 21st Century Maritime Silk Road,and the construction of a community of shared future in the region.

摘要：以广深港高铁虎门站站房改扩建及配套工程项目为背景,对该项目中应用的“Y”字型钢柱稳定性进行分析。采用ABAQUS软件对“Y”字型钢柱稳定性进行数值模拟,分析了“Y”字型钢柱的截面性质、应力分布、屈曲模态和失稳机理。通过模拟结果可知,该结构薄弱点出现在钢箱梁与左右两根钢斜柱的连接处,设计及施工时应采取加强措施。三角形整体结构传力路径十分合理,在正常使用及一定程度上的超重加载时仍能保持良好的整体形态,可以保障使用安全。

摘要：As a joint-optimization problem which simultaneously fulfills two different but correlated embedding tasks （i.e., entity embedding and relation embedding）, knowledge embedding problem is solved in a joint embedding scheme. In this embedding scheme, we design a joint compatibility scoring function to quantitatively evaluate the relational facts with respect to entities and relations, and further incorporate the scoring function into the maxmargin structure learning process that explicitly learns the embedding vectors of entities and relations using the context information of the knowledge base. By optimizing the joint problem, our design is capable of effectively capturing the intrinsic topological structures in the learned embedding spaces. Experimental results demonstrate the effectiveness of our embedding scheme in characterizing the semantic correlations among different relation units, and in relation prediction for knowledge inference.

摘要：This paper presents an efficient method for globally optimizing and automating component sizing for rotary traveling wave oscillator arrays. The lumped equivalent model of transmission lines loaded by inverter pairs is evaluated and posynomial functions for oscillation frequency, power dissipation, phase noise, etc. are formulated using transmission line theory. The re- sulting design problem can be posed as a geometric programJning problem, which can be efficiently solved with a convex opti- mization solver. The proposed method can compute the global optima more efficiently than the traditional iterative scheme and various design problems can be solved with the same circuit model. The globally optimal trade-off curves between competing objectives are also computed to carry out robust designs and quickly explore the design space.

摘要：Ancient India and Africa had thousands of years of early economic and cultural exchanges based on the basis of spontaneous *** the two sides gradually became colonies of Western countries,they passively changed their original communication methods and modes,and even partly changed *** relationship between India and Africa during this period was linked to the growth and decline of Western powers in the Indian Ocean region,reflecting the internal governance methods and foreign relations concepts of the non-colonial rulers of *** has generally experienced the Portuguese colonial period,the period of hegemony and the period of British *** a large period of time,the sub-stages such as the rule of the Mughal Empire and the British East India Company can also be ***,they present a relatively unique picture of historical exchanges between colonial Indo-African countries or regions.

摘要：对生鲜食用菌运输包装纸箱进行设计,提出了运输包装箱设计的方法,详细讨论了几种主要的生鲜食用菌运输纸箱包装的结构设计,探讨了纸箱包装的配件设计,为生鲜食用菌运输提供了更加安全可靠的纸箱包装。

摘要：Abstract：reconstruction method using slice im-ages is proposed. Wanting to extract the outermost contours from slice images, the method of the improved GVF-Snake model with optimized force field and ray method is employed. And then, the 3D model is reconstructed by contour connection using the im-proved shortest diagonal method and judgment function of contour fracture. The results show that the accuracy of reconstruction 3D model is improved.

摘要：Puccinia striiformis f. sp. tritici （Pst） is the obligate biotrophic fungus responsible for stripe rust wheat. In this study, we developed and characterized 20 polymorphic microsatelUte markers from the genomic sequence of an isolate of Chinese Pst race C^32. Polymorphism at each simple sequence repeat （SSR） locus was determined using 32 Pst isolates from 7 countries. The number of alleles varied from 2 to 7 across isolates, and the observed and expected heterozygosities ranged from 0.33 to 0.97 （mean 0.62） and 0.23 to 0.73 （mean 0.51 ）, respectively. As expected the genomic SSR markers were more polymorphic than the expressed sequence tag （EST）-SSR markers developed previously. These markers will be more useful for population genetics and molecular genetics studies in Pst.

摘要：该文提出了一种改进的外信息转移图(EXIT图)方法,可用于分析加性非高斯对称α稳定分布噪声多径信道条件下Turbo均衡性能,为实际的Turbo均衡系统设计提供预估性能参数。该方法对传统的EXIT图分析做出的改进在于给出了非高斯对称α稳定分布条件下一种实用的外信息的概率密度分布的近似估计。将EXIT图与系统误码率分析相结合,可对互信息变化的迭代轨迹、迭代次数和每次迭代能达到的误码率做出预测估计。对截断Turbo均衡方法的仿真结果表明,利用该方法预测的系统性能与实际的仿真结果基本一致,证实了该方法的有效性。