T=题名(书名、题名),A=作者(责任者),K=主题词,P=出版物名称,PU=出版社名称,O=机构(作者单位、学位授予单位、专利申请人),L=中图分类号,C=学科分类号,U=全部字段,Y=年(出版发行年、学位年度、标准发布年)
AND代表“并且”;OR代表“或者”;NOT代表“不包含”;(注意必须大写,运算符两边需空一格)
范例一:(K=图书馆学 OR K=情报学) AND A=范并思 AND Y=1982-2016
范例二:P=计算机应用与软件 AND (U=C++ OR U=Basic) NOT K=Visual AND Y=2011-2016
摘要:AIM:To develop a new decellularization method depended upon the natural corneal structure and to harvest an ideal scaffold with good biocompatibilities for corneal ***:The acellular cornea matrix (ACM) were prepared from de-epithelium fresh porcine corneas (DFPCs) by incubation with 100% fresh human sera and additional electrophoresis at 4℃. Human corneal epithelial cells (HCEs) were used for the cytotoxicity tests of ACM. ACM were implanted into the Enhanced Green Fluorecence Protein (eGFP) transgenic mouse anterior chamber for evaluation of ***:HE and GSIB4 results showed fresh porcine cornea matrix with 100% human sera and electrophoresis could entirely decellularize stromal cell without reducing its transparency. ACM has no cytotoxic effect ex vivo. Animal test showed there was no rejection for one month after ***:These results provide a decellularizing approach for the study of corneal tissue engineering and had the broader implications for the field of biological tissue engineering in other engineered organ or tissue matrix.
摘要:去中心化普遍被认为是下一代互联网整体组织形态与决策机制的底层架构特征,共识机制与寡头股东的存在,使得设计之初的平等与自治成为基于算力与技术能力的治权分配,自治组织在博弈论与马太效应的双重作用下,逐渐成为一个类公司化的社会组织。在去中心化与弱中心化趋势并存的当下,预期避免网络空间成为“法外之地”或“国际公域”,应当发掘可以替代属地管辖的全新优先规则,并在区分场景与层级的基础之上,为多方主体的协同管辖或共同治理提供立法支持,尤其应明确国家排他管辖的若干底线场景。具体到我国,应对技术的良性发展持有开放与包容的态度。为了确保新技术的风险可控、过程可管以及利益可享,应加以积极地立法预判,引入数字化解读的管辖规则作为过渡,同时也应借鉴“前区块链时代”的经验,布局多主体多层级共管,以技术标准带动立法规则与国际话语权的获取。
摘要:胃癌是全球第五常见的恶性肿瘤并死亡率较高,严重威胁人类的生命健康。因此,早期识别胃癌病变对早期胃癌诊断至关重要。显微高光谱成像技术作为一种新兴技术,可以在微观层面同时获取生物组织丰富的光谱信息和空间信息,为早期病理切片诊断提供了一种新的思路。利用显微高光谱成像系统,采集了在400~1000 nm波段范围的胃癌显微高光谱病理图像,通过光谱校正等预处理构建了包含230张图像的胃癌显微高光谱数据集。尽管基于空间注意力的方法在图像分类、分割等领域已取得了显著成果,但在处理高光谱图像时仍面临计算复杂度高以及光谱信息利用不充分的问题。为此,提出了基于卷积和注意力机制的混合双分支Transformer(MDBT)的特征提取主干网络模型。该模型通过交替应用空间混合模块和通道混合模块,实现块间和块内的空间和通道特征聚合。具体而言,设计了窗口注意力和卷积双分支以及空间和通道交互结构。这种设计不仅降低了计算复杂度,还通过卷积交互实现了窗口间信息交互和特征融合,从而克服了窗口注意力感受野受限的问题,进一步提高了Transformer的全局建模能力。在进行图像分割实验中,采用UperNet模型作为解码头网络对主干网络提取得到的特征进行还原,以得到最终的分割结果。在采集得到的胃癌高光谱数据集上进行了五折交叉验证实验,结果表明本模型的平均mDice和mIoU分别达到85.39、74.66,性能优于目前UNet、Swin、PVT、VIT等主流图像分割网络模型。同时设计一系列消融实验,验证本文提出空间和通道双混合模块、卷积与窗口注意力双分支等结构对实验结果的优化效果。实验结果表明本文提出的MDBT模型能够有效利用高光谱图像丰富的空间和光谱信息,提高胃癌图像分割准确率,证明显微高光谱成像技术在胃癌诊断方面具有一定的研究意义和应用价值。
摘要:上海西岸传媒港展望台为大跨度螺旋钢楼梯,采用空间悬挑钢桁架结构体系。以三角形管桁架为横断面沿梯段形成螺旋悬挑空间桁架。采用两种不同的计算软件对其进行分析对比,了解该体系的结构受力特性,并对关键构件进行有限元分析。最后提出了相应的设计原则,采取了有效措施,如局部设置斜撑和调谐质量阻尼器,可供类似工程参考。
摘要:Combination antiretroviral therapy(ART)reduced AIDS-related mortality and increased survival among patients living with HIV by interrupting HIV replication,enhancing immune recovery,and preventing the onset of opportunistic infections[1].In China,ART has rapidly been scaled up since the beginning of the National Free Antiretroviral Treatment Program(NFATP)in 2003[2].By the end of 2016,489,411 individuals diagnosed with HIV were receiving free antiretroviral treatment in *** is firmly committed to reducing overall AIDS-related mortality and HIV incidence within the ***,similar to other low-and middle-income countries,the NFATP is challenged by high mortality and attrition shortly after patients initiate ART[3].
摘要:本文从产业、城市和区域协同发展的视角,揭示了从创意产业到创意城市、再到创新型城市乃至创新型区域的演进轨迹,希冀对我国城市和区域发展有所启迪。
摘要:Based on the information system characteristics of mine, proposed network architecture design of the mine property. And in this framework based on the design of three-dimensional virtual mine described the application of intelligent management platform. Three-dimensional virtual underground mine that shows the situation, the core application is through remote monitoring system of information exchange between devices (material object communication). Internet of things in the framework of mining three-dimensional virtual reconstruction of mine. On coal mine safety in the production process of human, machine and environment, control elements and their harmony and unity. 3D virtual mine management platform integrates personnel positioning, dust control, gas monitoring, roof pressure monitoring, fan-line monitoring and other subsystems. Platform through the underground mine sensing equipment to conduct various types of monitoring data integration, through the transport layer device to transmit the information to the application layer intelligence processing software platform, the system automatically handles the operational status of each subsystem and the need for safe production under the proper introduction of human factors deal with special event. 3D virtual mine management platform to mining, excavation, transport, ventilation and other safety information quickly and accurately transmitted to the ground operation control center. Underground for the first time on the linkage between systems in case of emergencies, to provide safety for management decision support.
摘要:对基于CATIA软件的航空产品标准件库的关键技术和实现方案进行研究,提出一种基于CATIA的标准件库实现方法.对基于CAAAPI的标准件实体建模、零件参数表设计、基于Catalog的标准件层次结构设计及标准件的数据库存储模式设计等创建标准件库的关键技术进行描述,开发了标准件库系统.标准件库覆盖国标、航标、企标、军标的紧固件、机体构件、系统构件、管路系统构件、电气操纵构件等零件类型.
摘要:无缝技术将不同组织结构编织于同一立体针织物的横列与纵行而不产生缝份,且服用性能差异明显的组织结构间常有过渡组织。为研究过渡组织对立体针织物在拉伸载荷下力学性能的影响,以3种立体针织物为对象,首先采用实验法建立织物性能标签;然后通过变换组织结构与占比的实验设计分析立体针织物力学性能的影响因素;最后运用线性回归分析试验结果。研究得出:过渡组织的增加会导致织物拉伸回复性能的降低;增加应变性能较差的组织会导致整体应变性能的降低。研究结果不仅丰富了立体针织物的相关研究,也为无缝针织区域性压缩服装的开发提供一定的理论支持。
摘要:女性言说是美国华裔女作家用来突破男权叙事传统的有力策略。汤亭亭、谭恩美以女性为中心描写美国华裔/华人的生活和经验,将寓言故事与通俗故事揉为一体,互为言说,自由转换;她们站在两种文化的交叉面上,通过运用自传(传记)体、说故事、章回体等多种叙事策略,将个人、家庭的经历放大为群体的经验,阐释成历史与文化发展的历程,既看到两种文化的矛盾和对立,又看到两种文化交流和融合的可能性和必然性。她们在作品中把两种截然不同的文化之间的差异、矛盾和冲突及其碰撞与融合的过程艺术地展现在读者面前,使得小说更具文化内涵和艺术张力。
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