摘要：There has been exponential growth in research activities on nanomaterials and nanotechnology for appli- cations in emerging technologies and sustainable energy in the past decade. The properties of nanomaterials have been found to vary in terms of their shapes, sizes, and number of nanoscale dimensions, which have also further boosted the performance of nanomaterial-based electronic, catalytic, and sustainable energy conversion and storage devices. This reveals the importance and, indeed, the linchpin role of nanomaterial synthesis for current nanotechnology and high-performance functional devices. In this review, we provide an overview of the synthesis strategies for design- ing metal oxide nanomaterials in zero-dimensional （0D）, one-dimensional （1D）, two-dimensional （2D）, and three-di- mensional （3D） forms, particularly of the selected typical metal oxides TiO2, SnO2 and ZnO. The pros and cons of the typical synthetic methods and experimental protocols are reviewed and outlined. This comprehensive review gives a broad overview of the synthetic strategies for designing ＂property-on-demand＂ metal oxide nanostructures to fur- ther advance current nanoscience and nanotechnology.

摘要：Superhydrophobic and superhydrophilic surfaces have been extensively inves- tigated due to their importance for industrial applications. It has been reported, however, that superhydrophobic surfaces are very sensitive to heat, ultraviolet （UV） light, and electric potential, which interfere with their long-term durability. In this study, we introduce a novel approach to achieve robust superhydrophobic thin films by designing architecture-defined complex nanostructures. A family of ZnO hollow microspheres with controlled constituent architectures in the morphologies of 1D nanowire networks, 2D nanosheet stacks, and 3D mesoporous nanoball blocks, respectively, was synthesized via a two-step self-assembly approach, where the oligomers or the constituent nanostructures with specially designed structures are first formed from surfactant templates, and then further assembled into complex morphologies by the addition of a second co-surfactant. The thin films composed of two-step synthesized ZnO hollow microspheres with different architectures presented superhydrophobicities with contact angles of 150°-155°, superior to the contact angle of 103° for one-step synthesized ZnO hollow microspheres with smooth and solid surfaces. Moreover, the robust superhydrophobicity was further improved by perfluorinated silane surface modification. The perfluorinated silane treated ZnO hollow microsphere thin films maintained excellent hydrophobicity even after 75 h of UV irradiation. The realization of environmentally durable promising solution for their long-term irradiations. superhydrophobic surfaces provides a service under UV or strong solar light

摘要：变电站是供电系统的核心,从电网获得电能,通过其变压的功能,把统一电压的等级的电能变换成不同电压等级的电压,把电能分配到不同电压等级的输电线路,供给不同的用电设备。因此结合实际具体分析确定主接线,对短路电流进行计算和分析,并以此数据作为电气设备和电缆的选型作为依据,确保配电系统运行的方式和稳定性。

摘要：大气中CO_(2)浓度不断上升导致大量的环境问题,如冰川融化、温室效应、极端天气等,利用电化学方法将CO_(2)经还原反应(CO_(2)RR)转化为有价值的燃料或化学品是解决该问题的可行策略.由于CO_(2)具有稳定的化学键(C=O,806 kJ mol^(-1)),需设计具有优异活性和高选择性的催化剂.近年研究结果表明,过渡金属锚定在N掺杂碳载体上而制得的催化剂(M-N-C)具有较高的原子利用率、独特的活性金属中心电子结构以及存储量丰富,因而被认为是CO_(2)还原为CO的理想电催化剂.目前已经提出了多种方法来制备M-N-C催化剂,包括原子层沉积、基于金属-有机骨架的离子交换、基于载体修饰策略的吸附固化和受限热解.然而,这些方法存在制备过程繁琐或难以大规模生产的问题.同时,采用高温热解制备的M-N-C催化剂,金属活性位点易被其致密的结构包裹,难以完全暴露出来.但有效的活性位点对M-N-C的催化性能起着至关重要的作用,因此有必要研制一种简便、高效的方法来抑制金属原子聚集.超薄二维碳骨架已被证明可以缩短反应物的扩散路径并有利于暴露催化剂活性位点.本文将NiZn层状双金属氢氧化物(NiZn-LDHs)在多羟基化合物中进行剥离形成单层,同时通过控制单层NiZn-LDHs、多羟基化合物和三聚氰胺共同热解,宏量化制得Ni-N-C催化剂.X射线衍射(XRD)和透射电子显微镜(TEM)结果表明,在焙烧过程中,可通过改变单层NiZn-LDHs在多羟基化合物中的含量控制Ni-N-C材料中镍纳米颗粒的生成;焙烧过程中Zn挥发能使Ni-N-C材料形成更多中孔,增加碳骨架比表面积和孔径.中孔通道和碳基底超薄特性结合可以促进CO_(2)向内部活性位点扩散,增加反应物与活性位点的接触.XPS结果表明,Ni-N-C材料中Ni原子通过与N配位,锚定在超薄碳骨架上,且存在Niδ+中心(0<δ<2).X射线近边吸收和扩展X射线吸收精细结构分析表明,Ni-N-C-1中的Ni处于低价态(0<δ<2),这与XPS分析一致,且Ni为原子级分散;小波变换分析表明,Ni和N的配位数为3.9.利用H型电解池评估Ni-N-C材料电催化CO_(2)还原性能表明,Ni-N-C-1具有优异的CO_(2)还原活性,在-0.6至-1.0 V电位范围内,FE_(CO)都大于90%,且在-4.9 V时,FE_(CO)为95.2%,CO电流密度为24 mA cm^(-2);在-0.8 V电位,工作25 h后Ni-N-C-1的CO电流密度基本保持不变,说明Ni-N-C-1为稳定的CO_(2)RR催化剂.通过密度泛函理论计算研究了Ni-N-C材料电催化CO_(2)还原为CO的电化学演化历程,结果表明,该反应过程分四个步骤:CO_(2)吸附到单个Ni原子位点上;转移形成*COOH的质子/电子对;*COOH在释放H_(2)O的同时获得质子形成*CO;*CO从Ni位点解吸.相应步骤的吉布斯自由能分别为0.54,1.69,-0.99和-0.98 ***-N-C中Ni原子与配位N原子之间的强相互作用导致Ni原子的电子损失,Ni原子有0.85 e缺陷,周围的N原子有0.15 e堆积,这有利于CO_(2)的吸附.总之,本文采用单层NiZn-LDHs为金属源,开发了一种简便且可宏量化制备CO_(2)RR单原子催化剂的新方法.

摘要：As an important form to express inference and reasoning,if-conditional has occupied a significant position in linguistic *** studies investigate the issue in virtue of categorization,cognitive semantics and comparative analysis,*** far few researches have concerned meaning construction of if-conditionals from a perspective of cognitive *** on the mental space theory,it is found that two mental spaces are set up in discourse,a base space representing if-clause and main clause represented by an expansion *** elements in spaces are respectively projected in a mapping relation,the meaning is constructed by *** paper aims to provide a full interpretation for meaning construction by establishment of mental spaces and mapping between them,and also the analysis of subjectification pattern of if-conditionals,providing reference for future studies of the issue.

摘要：旅游文本作为"信息+感染"型的话语,当中含有丰富的评价资源,已引起众多学者的兴趣和关注。本文基于评价框架,以中西世界文化自然遗产旅游景点的官网介绍为例,运用UAM Corpus软件对比分析二者评价资源的分布情况及其使用偏向。为了妥善处理好国内旅游网页的评价资源,应采用省译、改写、转喻为义等翻译策略使译文更接近目标读者的心理期待和阅读习惯,从而提高译文的可读性。

摘要：虚拟现实技术是一门涉及多领域的课程，也是数字媒体技术专业学生的专业必修课。针对传统教学中以老师为中心，忽略学生的个体差异，学生的主观能动性得不到很好的调动。因此在课程中引入了“翻转课堂”教学模式，以项目分组设计来激发和调动学生的研究性学习及团队协作能力。文章从课程的教学目标、教学内容、翻转教学、考核形式几个发面提出了改革的教学策略。通过教学实践，该模式取得了较为良好的教学效果，并对学生的创新能力培养起到了促进作用。

摘要：结合岭南特色醒狮题材和新兴版画运动以及作品解读,进行醒狮文化的版画创作,展现佛山醒狮文化的喜庆祥和的艺术魅力。

摘要：针对电动观光车电池管理系统只对整组铅酸蓄电池总电压进行监控和保护的严重不足,设计了基于NRF24L01无线通信模块的电池管理系统,详细论述了系统结构,硬件和软件设计,以及NRF24L01收发器的配置方法;试验结果表明,系统实现了对6个电池电压及温度的实时监控,简化了布线,可较好地应用于以铅酸电池为动力电池的电动观光车上。

摘要：The low temperature,high salt content,and bacterial composition of a seawater environment can induce severe infections in open wounds,thus impeding wound *** date,numerous wound dressings have been developed for injuries and various antibacterial ***,ordinary antibacterial strategies could not provide long-term resistance to infections and could not promote wound ***,we proposed a strategy for enhancing resistance to seawater immersion wound infection by killing bacteria and delivering bacterial antigens in ***,MXene-embedded tannin-Eu^(3+)(M@TA-Eu)particles were constructed to effectively alleviate injuries infected through seawater immersion and persistently fight infection by forming in situ bacterial vaccines and immune *** the particle,the platform composed of TA and Eu3+exhibited provascularization and antigen presentation *** with near-infrared photothermal effect were introduced to kill the bacteria,promote the recruitment of antigen presentation cells,and ultimately enhance vaccination *** results showed that the particles not only effectively accelerated the healing of injuries by relieving wound inflammation and inhibiting bacteria but also produced a potent vaccination by forming in situ bacterial ***,the M@TA-Eu particles are novel materials for high-grade anti-infection dressing.