摘要：Bone defects have serious economic and clinical impacts;however,despite improvements in bone defect management,the range of clinical outcomes remains limited.A variety of biomaterials have been used to treat complex bone ***,final bone repair outcomes may be adversely affected by poor osteogenic capacity and risk of ***,therapeutic methods are required that reduce bacterial contamination and increase the use of osteogenic ***,we report the preparation of poly(lactic acid-coglycolic acid)(PLGA)microspheres coloaded with magnesium(Mg^(2+))and gallium(Ga^(3+))ions(Mg-Ga@PLGA),which can fill irregular bone defects and show good *** in vitro testing,Mg-Ga@PLGA not only showed a synergistic effect on promoting osteogenic differentiation but also inhibited osteoclastic ***,we found that Mg-Ga@PLGA demonstrated an antibacterial *** in vivo testing,Mg Ga@PLGA exhibited strong in situ osteogenic *** conclusion,Mg-Ga@PLGA has good potential for treating bone defects at risk of infection.

摘要：Named entity recognition （NER） is a core component in many natural language processing applications. Most NER systems rely on supervised machine learning methods, which depend on time-consuming and expensive annotations in different languages and domains. This paper presents a method for automatically building silver-standard NER corpora from Chinese Wikipedia. We refine novel and language-dependent features by exploiting the text and structure of Chinese Wikipedia. To reduce tagging errors caused by entity classification, we design four types of heuristic rules based on the characteristics of Chinese Wikipedia and train a supervised NE classifier, and a combined method is used to improve the precision and coverage. Then, we realize type identification of implicit mention by using boundary information of outgoing links. By selecting the sentences related with the domains of test data, we can train better NER models. In the experiments, large-scale NER corpora containing 2.3 million sentences are built from Chinese Wikipedia. The results show the effectiveness of automatically annotated corpora, and the trained NER models achieve the best performance when combining our silver-standard corpora with gold-standard corpora.

摘要：“崇奇尚异”是晚明一股非常重要的文化风习,具体到戏曲批评领域,也出现了大量关于“奇”观念的反思与言说。和前代相比,晚明戏曲批评中的“奇”观念呈现鲜明的体系化、多元化、深入化等特征。通过对晚明戏曲批评资料的梳理,发现晚明戏曲的尚“奇”内涵主要包括戏曲题材之奇和戏曲写作之奇两个重要组成部分。戏曲题材之奇主要有事之奇、人之奇、情之奇三大类别,戏曲写作之奇又可细分为构思、境界、叙事、结构、语言这五个层面。晚明戏曲对于“奇”的张扬与书写,是文人日益失落的精神世界在艺术领域中的一种折射,同时也充当着奇士抒发抑郁不平之气的文化工具。

摘要：【目的和方法】为掌握煤层水平井中随钻电磁波仪器探测影响因素,通过有限元数值模拟采用多频、多线圈距的正交耦合线圈进行边界探测研究,确定了仪器线圈最佳排布非对称方式,并获得了适合高阻煤层的频率、源距、线圈间距的优化工作参数选择。【结果和结论】通过正交线圈与倾斜线圈对比研究,发现倾斜线圈时定向信号虽然理论上幅度比信号随着线圈距增大在增强,但实际的倾斜线圈感应电动势的幅值却随着线圈距增大而减小,增大了信号采集的难度。通过研究设计了一种适合煤矿使用的方位电磁波电阻率正交线圈系结构,满足高阻情况下同时具备电阻率和界面探测的功能,获得了适合高阻煤层的频率、源距、线圈间距的优化参数,为煤矿井下孔内顺煤层方位电磁波探测技术提供基础。

摘要：牌坊是古徽州重要的建筑(构)遗存形式之一,其艺术风格具有强烈的地域特征。基于现存牌坊基本信息与数字化测绘模型,通过梳理现存古徽州牌坊的外在与内在特征,类比分析牌坊的社会功能、文化内涵、形制及结构构件的特征,以期构建徽州牌坊形制的历史谱系,探索徽州建筑文化中持续追求功能与装饰之间关系的演变、传承与发展之路。

摘要：超声速降落伞作为提供气动阻力和稳定性的重要气动减速系统,其设计好坏直接影响着探测器着陆任务的成败。适应不同气动性能需求的降落伞结构参数通常是相互矛盾的,为了解决火星降落伞在外形设计时的结构参数矛盾,以及设计周期长、计算误差大的问题,本文提出了一种面向探测器-降落伞双体模型的融合代理优化策略。融合代理模型集成了插值型代理模型和回归型代理模型的优点,能够在相同样本的条件下具备更高的气动力系数预测精度。通过采用融合代理模型替代长耗时的计算流体力学(CFD)计算过程,能够缩短设计周期,提高设计效率。结合多目标遗传算法对探测器-盘缝带伞双体模型进行了优化设计,结果表明,采用融合代理优化策略能够平衡伞体的阻力性能及稳定性能,在满足结构及气动约束的前提下提升盘缝带伞的综合减速能力,具有良好的实用性和可行性。文章的研究结果可为未来新一代火星探测用超声速降落伞的设计研制提供一定的理论参考和技术储备。

摘要：The monitoring and warning of urban rail transit is the core of operation management, and the breadth and depth of the monitoring range directly affect the quality of urban rail transit operation. For the current domestic monitoring system, most of the critical equipments and technologies are introduced from abroad;it is diseconomy, and also causes hidden danger. Realizing the localization of monitoring and early warning system is imperative. Based on the analysis of the present situation of urban rail transit operation safety at home and abroad, the paper proposes to use integrated technology to design basic framework of monitoring and warning system of urban rail train, and puts forward the critical technologies to realize the system. Compared with the existing monitoring system, the integrated monitoring system has the characteristics of wide monitoring range, clear division of labor, centralized management, coordination and integration operation and intelligent management, and embodies the concept of people-oriented. It has scientific significance for future construction of domestic Integrated Monitoring and Early Warning System (IMEWS) of urban rail transit.

摘要：Higher-order topological insulators(HOTIs),with topological corner or hinge states,have emerged as a thriving topic in the field of topological ***,few connections have been found for HOTIs with well-explored first-order topological *** a proposal asserted that a significant bridge can be established between the HOTIs and Z2 topological *** subjected to an inplane Zeeman field,corner states,the signature of the HOTIs,can be induced in a Z2 topological *** Zeeman fields can be produced,for example,by the ferromagnetic proximity effect or magnetic atom doping,which drastically increases the experimental ***,we show that a phononic crystal,designed as a bilayer of coupled acoustic cavities,exactly hosts the Kane-Mele model with built-in in-plane Zeeman *** helical edge states along the zigzag edges are gapped,and the corner states,localized spatially at the corners of the samples,appear in the *** verifies the Zeeman field induced higher-order *** further demonstrate the intriguing contrast properties of the corner states at the outer and inner corners in a hexagonal ring-shaped sample.

摘要：运用等效层理论,设计了一种目标波长分别为780,810,850 nm,在45°入射角下使用的反射镜,该反射镜在保证膜层高反射率的同时实现了对偏振和相位的调控。为了在较宽波段上满足平均反射率高的要求,选用金属银和Ta2O5、SiO2作为光学薄膜的材料。采用电子束蒸发和热蒸发方式并配合石英晶体振荡监控膜厚等工艺,在JGS-1石英基底上获得了500~1600 nm波段范围内平均反射率大于95%,目标波长下消光比分别优于3000∶1、5000∶1和7000∶1的反射镜膜系。所设计的反射镜可以满足空间环境下量子通信应用的可靠性要求。

摘要：以上海市某商业广场项目高效制冷系统改造工程为例,介绍了该工程概况及高效制冷系统改造工程的全过程服务,从空调制冷系统现场勘测及检测评估、集成磁悬浮副冷站高效机房设计、主冷站高效制冷系统设计、高效制冷系统实施重难点解决方案、高效制冷系统的改造实效5个方面进行了详细说明。提出了既有大型商业高效制冷系统运行痛点和解决措施,系统性地归纳、总结了适用于改造工程的高效制冷系统的技术路径与实施建议。