摘要：Uncovering the structure evolution and real active species of energy catalytic materials under reaction conditions is important for both understanding structure-activity relationship and constructing electrocatalysts for CO2 electroreduction(CO2ER).And integrating CO2ER with an anodic organic transformation to replace the oxygen evolution reaction is highly ***,In2O3 is selected as the model material to reveal the surface reconstruction under CO2ER *** situ and ex situ results reveal that the electrochemical in situ reconstruction of crystalline In2O3 leads to the formation of crystalline-In/amorphous In2O3-x heterostructure(In/In2O3-x).In/In2O3-xacts as the real active phase with Faradaic efficiency of^89.2%for the formate,outperforming In(~67.5%).The improved performance can be ascribed to electron-rich In rectified by Schottky effect of ***,formate and high-value octanenitrile can be simultaneously achieved by integrating CO2ER with octylamine oxidation in an In2O3-x||Ni2P two-electrode electrolyzer.

摘要：Building a cloud geodatabase for a sponge city is crucial to integrate the geospatial information dispersed in various departments for multi-user high concurrent access and retrieval,high scalability and availability,efficient storage and *** this study,Hadoop distributed computing framework,including Hadoop distributed file system and MapReduce(mapper and reducer),is firstly designed with a parallel computing framework to process massive spatial ***,access control with a series of standard application programming interfaces for different functions is designed,including spatial data storage layer,cloud geodatabase access layer,spatial data access layer and spatial data analysis ***,a retrieval model is designed,including direct addressing via file name,three-level concurrent retrieval and block data retrieval *** functions are realised,including real-time concurrent access,high-performance computing,communication,massive data storage,efficient retrieval and scheduling decisions on the multi-scale,multi-source and massive spatial ***,the performance of Hadoop cloud geodatabases is validated and compared with that of the Oracle *** cloud geodatabase for the sponge city can avoid redundant configuration of personnel,hardware and software,support the data transfer,model debugging and application development,and provide accurate,real-time,virtual,intelligent,reliable,elastically scalable,dynamic and on-demand cloud services of the basic and thematic geographic information for the construction and management of the sponge city.

摘要：目的以工业设计的学术背景介入中国传统低音拉弦乐器革新设计,进行“中国方式”的乐器设计,突破半个世纪以来民族低音拉弦乐器的开发瓶颈,探索工业设计背景下民族乐器革新的一般方法,并拓展到实际应用中。方法围绕民族低音拉弦乐器设计革新这一主题,采用跨学科研究方法,横跨设计学与乐器学,探讨乐器造型设计与民族风格的关系,提出中国方式的发声原理与乐器结构设计,并使演奏方式符合人机工程学,完成产品输出和样机声学测试,论证设计的创新性与有效性。结论工业设计师运用现代设计手法,从产品风格、造物美学、人机工程、音色实现和文化寓意等多维度进行理论梳理和设计革新,工业设计启发民族艺术,呈现中国方式的乐器革新设计,是一次成功的跨学科实践。

摘要：研究了IoC模式的工作原理,将该理论应用到轻量级容器的设计中,论述了轻量级容器的设计过程和关键实现步骤,指出了轻量级容器如何解决当今J2EE系统开发过程中存在的问题,给出了应用实例,验证了该设计的有效性。

摘要：试验研究了酵母代谢物与氮、磷、钾无机肥复合施用对郁金香(Tulipa gesneriana L.)花期和二代球的影响,为延长郁金香花期和种球复壮提供依据。试验设计了3组处理,包括对照、常规无机肥(氮、磷、钾,NPK)以及酵母代谢物与无机肥复合施用(酵母代谢物+NPK),以拉利贝拉和金阿波罗郁金香商品种为材料进行施肥处理。结果表明,酵母代谢物+NPK处理能够延长郁金香的花期,其中拉利贝拉在酵母代谢物+NPK处理后,与对照和NPK处理相比,花期分别延长5 d和2 d;而金阿波罗的花期则分别延长6 d和2 d。与对照和NPK处理相比,酵母代谢物+NPK处理周径较大的二代球占比更高;单个种球鲜重显著增加;种球内部的淀粉、可溶性糖和可溶性蛋白质含量均居于首位。综上所述,酵母代谢物与无机肥复合施用不仅能延长郁金香花期,还能促进郁金香二代球的膨大和营养积累。

摘要：提出了一种新型无遮拦红外折反射光学系统的设计方法以解决原系统存在的中心遮拦问题.分析了传统离轴两反望远系统由于存在线性像散而无法实现无遮拦设计的原因,给出了消线性像散的条件.基于上述条件提出了通过对接共轴透镜组实现无遮拦折反射系统设计的基本思想.最终,通过联接不同的中继镜组完成了无遮拦中波、长波红外系统的设计.设计的应用于制冷型3～5 μm中波和8～12 μm长波红外的两套无遮拦折反光学系统的焦距为200 mm,F数为2,全视场为2.75°×2.2°.各视场光学传递函数显示设计的光学系统的成像质量接近衍射极限.得到的结果表明,利用消线性像散的共焦离轴两反系统与同轴透镜组联合设计,可以得到高性能无遮拦的折反射红外光学系统.

摘要：第五代移动通信网络(5G)的到来标志着互联网市场的进一步发展,同时竞争也会更加激烈。网站同质化日益严重,快速的系统响应和转换成本的不断降低让消费者可以在不同的内容网站中随意"切换"。因此,如何增加用户访问量并维持用户量是学界重点关注的问题。本文在抗拒理论的基础上,以沉浸体验作为中介变量,探讨了感知侵扰和自由威胁对用户粘性的影响。通过对295个内容网站的用户调查发现,广告对沉浸体验的负向影响是存在的,而沉浸体验会有效提高用户粘性。在对广告耐性的研究中发现,更多的用户可以接受10~20秒时长的广告,这意味着调整广告内容、控制投放时间、增强沉浸体验可以使内容网站更加成功。

摘要：光机热一体化设计是改进空间光学仪器设计,优化系统总体设计参数的重要方法。集成分析法对设计方案综合性能的动态评估是一体化设计的核心,通过分析系统热光学性能,指导修改设计参数,实现系统光/机/热同步设计。以某空间光学仪器主镜系统的热控设计为例,介绍了这种方法在实际工程中的应用。

摘要：The duck circovirus （DuCV） infection in sick ducks from Fujian Province was investigated. The liver samples of 43 sick Muscovy ducks with infectious serositis were collected from 12 duck farms in Fujian Province Based on the published sequences of DuCV, two primers were designed for the detection of DuCV and four pairs of primers were designed to amplify four overlapping fragments that cover the complete genome of DuCV. The specific PCR products were amplified from positive samples. The fragments were then cloned into pMD18-T vector and sequenced, and the full length genomic sequence of the FJ0601 isolate of DuCV was obtained. PCR analysis showed that the proportion of ducks which were positive for circovirus was 79% and 10 out of the 12 farms were positive. Sequence analysis showed that the complete genome of DuCV-FJ0601 was 1988 bp and possessed features common to the family Circoviridae which included a stem-loop structure and the Rep protein motifs. Homology analysis showed that FJ0601 isolate of DuCV had 97.3%-97.5% nucleotide sequence identity to all the four Taiwan isolates （TC1/2002, TC2/2002, TC3/2002, TC4/2002）, 82.9% identity to the America （33753-52） isolate and 82.3% identity to the Germany isolate. Phylogenetic analysis with Clustal W, however, showed that FJ0601 isolate of DuCV was on a common branch with Taiwan isolates, and Germany and America isolates belonged to the other branch.

摘要：The problems associated with vibrations of viaducts and low-frequency structural noise radiation caused by train excitation continue to increase in importance.A new floating-slab track vibration isolator-non-obstructive particle damping-phononic crystal vibration isolator is proposed herein,which uses the particle damping vibration absorption technology and bandgap vibration control *** vibration reduction performance of the NOPD-PCVI was analyzed from the perspective of vibration *** paper explores the structure-borne noise reduction performance of the NOPD-PCVIs installed on different bridge structures under varying service conditions encountered in practical engineering *** load transferred to the bridge is obtained from a coupled train-FST-bridge analytical model considering the different structural parameters of *** vibration responses are obtained using the finite element method,while the structural noise radiation is simulated using the frequency-domain boundary element *** the particle swarm optimization algorithm,the parameters of the NOPD-PCVI are optimized so that its frequency bandgap matches the dominant bridge structural noise frequency *** noise reduction performance of the NOPD-PCVIs is compared to the steel-spring isolation under different service conditions.