摘要：Kirigami arts have provided a more promising method for building multiscale structures,which can shape two-dimensional(2D)sheets into three-dimensional(3D)configurations by cutting and ***,we first carried out a theoretical analysis of the mechanical properties of 2D honeycomb lattice structures and experimental verification combined with finite element(FE)***,a series of thick-walled 3D kirigami-inspired honeycomb(TW3KH)structures with different mechanical properties were designed and fabricated on the exploration and optimization of geometric parameters of 2D honeycomb *** investigations of folding feasibility,self-expansion,and self-folding performance experimentally showed that our designed four-dimensional(4D)printing structure had good programmability and shape memory capability and a large volume change ratio during shape ***,research on its compression deformation behavior found that the TW3KH structures can recover load-bearing capacity very well when the angle is ***,these TW3KH structures have great advantages in space-saving smart load-bearing equipment.

摘要：The meaning of advertising is generated through how audience perceive,observe,describe,and interact with *** advertising is not only a bare statement of fact,it is far from being a reliance on literal and *** the contrary,it is rather a combination of many types of concept communications,containing *** the emotion idea can be easily to elicit perceptions,interpretations,and the affective response of the consumers with regard to the information being *** key concept also facilitate the process of explicating different situational phenomena that demonstrate certain attitudes,beliefs,and values.

摘要：随着技术进步,文化遗产保护与乡村振兴亟需设计治理的同步提升。本研究以广州陈家祠为例,探讨了不可移动文物在现代社会转型中的重要性。通过设计治理策略,陈家祠成功转型为公共文化空间,促进了文化保护与社会创新,增强了社区凝聚力。研究进一步分析了祠堂在建筑修缮、资源整合、文化价值提升和宗族凝聚力强化中的作用,为乡村振兴提供了新动力。本研究提出了一个创新框架设计治理模型图示,该图示通过文化传承、社会治理、经济发展与社区参与四个核心要素整合文化传承、社会治理、经济发展与社区参与为文化遗产的现代转型提供新视角,解决了传统与现代、宗族与国家关系的转化问题。

摘要：A series of zwitterionic‐type quaternary ammoniums(ZTQAs)with varying lengths of alkyl chains combined with KI were synthesized and considered as catalysts for the coupling reaction of CO2 and various terminal *** prolonged alkyl chain of ZTQAs exhibited temperature‐responsive self‐separation in propylene carbonate(PC).The interaction between ZTQAs and KI was confirmed by X‐ray photoelectron spectroscopy and quantum chemical *** interaction strengthened the nucleophilicity of the I?ion,favoring the catalytic *** 3‐(dimethyltetradecylammonium)propane sulfonate(DTPS)/KI showed an excellent yield of PC(95.1%)at 125°C,1.5 MPa,and 1 mol%loading of *** precipitate formed spontaneously from the catalytic system,providing high catalytic activity of the homogeneous catalyst,as well as easy recovery of the heterogeneous catalyst.

摘要：The influence of brazing temperature and brazing time on the microstructure and shear strength ofγ-TiAl/GH536 joints brazed with Ti-Zr-Cu-Ni-Fe-Co-Mo filler was investigated using SEM,EDS,XRD and universal testing *** show that all the brazed joints mainly consist of four reaction layers regardless of the brazing temperature and brazing *** thickness of the brazed seam and the average shear strength of the joint increase firstly and then decrease with brazing temperature in the range of 1090-1170℃and brazing time varying from 0 to 20 *** maximum shear strength of 262 MPa is obtained at 1150℃for 10 *** brittle Al3NiTi2 and TiNi3 intermetallics are the main controlling factors for the crack generation and deterioration of joint *** fracture surface is characterized as typical cleavage fracture and it mainly consists of massive brittle Al3NiTi2 intermetallics.

摘要：目前用于铁路基床的填料大多数为级配优良的填料,而对风积沙作为路基填料在列车荷载作用下的累积塑性变形特性和临界动应力研究不多,但风积沙作为路基填料已在沙漠铁路建设中得到运用。为探究列车荷载作用下风积沙填料填筑铁路路基的累积塑性变形演变特性及临界动应力,考虑围压、动应力幅值、压实系数和含水率等因素的影响,开展一系列动三轴试验。试验结果表明:风积沙累积塑性应变随压实系数、围压的增大而减小,随动应力幅值的增大而增大。以最优含水率为分界点,低于最优含水率时,风积沙累积塑性应变随含水率的增加而减小;高于最优含水率时,风积沙累积塑性应变随含水率的增加而增大。风积沙试样的累积塑性应变曲线可分为:稳定型、临界型和破坏型。根据对累积塑性应变曲线的分类,获得了不同条件下风积沙填料的临界动应力。风积沙临界动应力随围压和压实系数的增大而增大,饱和含水率下风积沙填料的临界动应力明显小于天然含水率和最优含水率下风积沙填料的临界动应力。临界动应力和围压具有较好的线性关系。构建了可考虑围压和含水率影响的风积沙临界动应力经验公式,通过临界动应力公式确定了不同工况下风积沙作为路基填料的适用范围。试验结果可为沙漠铁路的设计、施工以及运营提供经验和理论依据。

摘要：The nitrogen reduction reaction(NRR)using new and efficient electrocatalysts is a promising al‐ternative to the traditional Haber‐Bosch ***,it remains a challenge to design efficient catalysts with improved catalytic ***,various O‐functional MXenes were investigated as NRR catalysts by a combination of density functional theory calculations and least absolute shrinkage and selection operator(LASSO)***_(3)C_(2)O_(X) has been regarded as a promising catalyst for the NRR because of its stability,activity,and *** poten‐tial‐determining step is*NH_(2) hydrogenation to*NH3 with a limiting potential of-0.45 ***‐more,via LASSO regression,the descriptors and equations fitting the relationship between the properties of O‐functional MXenes and NRR activity have been *** work not only pro‐vides a rational design strategy for catalysts but also provides machine learning data for further investigation.

摘要：绘画是一门视觉艺术,同时也是一门造型艺术。绘画艺术的许多问题最终都需要经过视觉形式语言来回答。在中国当代的重彩画开始复兴与成长的过程中,如何使曾经辉煌灿烂的艺术形式及其表现形态趋于现代,使其审美趣味从古典趋往当代,我在着重研究中国石窟壁画、寺观壁画方面,着重于当时社会人文的大背景下,对其艺术的线条、构图、赋色的演变和发展,作了较为深入的研究和探索。

摘要：为了寻找高活性的新化合物,设计并合成了20个含噁二唑片段的1,2,3-苯并三嗪-4-酮硫醚(砜)类衍生物.离体抑菌活性测定结果显示,6-氯-3-(5-乙砜基)-1,3,4-噁二唑-2-基甲基)苯并[d][1,2,3]三嗪-4(3H)-酮(7c)对油菜菌核病菌Sclerotinia scleotiorum具有较好抑制效果, EC50值为3.84 mg/L,与对照药剂噁霉灵(5.43 mg/L)相当. 7c (1.81 mg/L)对水稻纹枯病菌Rhizoctoniasolani的毒力与对照药剂多菌灵(1.09mg/L)相当,显著高于对照药剂噁霉灵(45.70mg/L).在100和200mg/L浓度下,化合物7c对水稻纹枯病菌保护防效分别为78.51%和84.48%,治疗防效分别为60.34%和78.91%,低浓度时的治疗防效与多菌灵(61.53%)相当.离体杀线虫活性测定结果显示,浓度为100mg/L时,部分化合物对秀丽隐杆线虫和松材线虫有一定的活性,3-(5-乙硫基)-1,3,4-噁二唑-2-基甲基)苯并[d][1,2,3]三嗪-4(3H)酮(6a)对秀丽隐杆线虫二龄幼虫的LC50值为3.96 mg/L,优于对照药剂噻唑磷(57.39 mg/L),与氟吡菌酰胺(4.68 mg/L)相当;化合物6a(50.28mg/L)对松材线虫的毒力低于噻唑磷(24.68mg/L)和氟吡菌酰胺(0.57mg/L).本研究所合成的目标化合物具有较高杀菌活性和一定的杀线虫活性,为新型1,2,3-苯并三嗪-4-酮类衍生物活性研究提供参考.

摘要：近年来,物联网的发展受到了高度重视,学术界、工业界及政府对物联网的发展给予极大关注.物联网被认为是可以将数以亿计的物理对象连接起来,通过信息技术进行监测、分析和控制的网络,在延伸人类的感知控制能力方面潜力巨大.大量物联网研究工作已经开展,许多物联网示范系统也被开发,并取得了显著应用效果.但同时,物联网当前的发展也面临着一些根本性的问题:物联网有什么特殊需求必须满足?当前物联网技术处于什么阶段?物联网的发展方向在哪里?这些问题值得探讨.本文回顾了互联网发展的历程,并根据互联网发展经验,分析物联网的现状,提出物联网当前处于"物-机"相连的局部小规模物网阶段,其发展方向应是相连众多小规模"物网"的开放大网——"物联网".基于这一思路,提出称之为WInternet的物联网设计,并介绍了其总体架构、工作模式和协议体系,同时也探讨了若干其他值得进一步研究的问题.