摘要：随着数字技术的发展,智能建造应运而生,智能建造离不开机器人技术。依据机器人的工作方式,综述了固定型机器人、移动型机器人和智能型机器人在智能建造中的应用与发展现状,同时从结构设计及材料、控制系统及方法、传感器和终端执行器方面,指出应用于智能建造中机器人发展的关键技术。

摘要：课程考核是改进课程教学、评价课程教学效果的重要依据,该文以电路课程为例,探讨如何基于OBE(成果导向教育)理念,加强学生学习过程管理,围绕课堂教学进行设计,重构适合的课程学习过程性考核方式,即明确考核方式的评分依据,确保考核结果的定量化,保证教学目标的有效达成;基于慕课平台记录过程性考核相关反馈数据,及时了解学生的学习状况,对遇到学习困难的学生给予指导完成形成性评价报告,形成课程教学闭环,最终带动课程的持续改进,从而调动学生学习的积极性和主动性,形成良好的学风,促进学生知识、能力、素质全面协调发展。

摘要：目的:观察术前注射腺病毒介导的肝细胞生长因子/血管内皮生长因子165(Ad-HGF/VEGF165)对大鼠超比例随意皮瓣成活的影响和其机制的初步研究。方法:大鼠背部设计超比例随意皮瓣模型,将其随机分为Ad-HGF/VEGF165组、AdVEGF165组和对照组。术前7 d,Ad-HGF/VEGF165组和Ad-VEGF165组分别于大鼠皮瓣及创缘内多点注射Ad-HGF/VEGF165及AdVEGF165,对照组注射等容量0.9%氯化钠注射液。分别于术后7 d、14 d观测皮瓣成活面积,切取皮瓣组织标本HE染色、免疫组化观察微血管密度及组织间VEGF阳性率等指标,WesternBlot检测目的蛋白表达情况。结果:术后7 d、14 d,Ad-HGF/VEGF165组、Ad-VEGF165组皮瓣存活面积、组织间微血管数目、VEGF及细胞外调节蛋白激酶(ERK1/2)蛋白表达情况均高于对照组(P<0.001),且Ad-HGF/VEGF165组明显高于Ad-VEGF165组(P<0.05)。结论:Ad-HGF/VEGF165具有协同作用,能显著促进VEGF和ERK1/2信号因子表达,短期内促进血管网重建,改善皮瓣血液灌注,提高大鼠超比例随意皮瓣成活面积。

摘要：FeSi合金是一种性能优异的软磁材料,具有较高的饱和磁化强度,较低的磁损耗,较低的成本和磁芯设计灵活等特点,在开关电源、电动汽车以及光伏产业应用广泛。本文采用气雾化方法制取FeSi合金粉末,利用激光粒度分析仪、扫描电子显微镜(SEM)、电感耦合等离子发射光谱仪(ICP)、ONH-3000氮氧仪和金属粉末松装密度测定仪检测和分析粉末的粒度分布、形貌、物理化学性能。结果发现FeSi软磁合金粉末具有颗粒球形度高,松装密度高,氧含量低和粒度分布较均匀等特点。采用无机包覆的方式将FeSi软磁合金粉末制备成FeSi磁粉芯,通MATS-2010SD/K100软磁直流测量装置和MAZ513080SA/1M软磁材料动态测量装置研究了FeSi磁粉芯的磁性能以及磁损耗,结果显示,在5000A/m的磁场下,饱和磁化强度为0.6T;在50kHz下磁损耗达到110mW/cm^(3),具有良好的软磁性能。

摘要：In order to overcome the limitations of traditional microperforated plate with narrow sound absorption bandwidth and a single structure,two multi-cavity composite sound-absorbing materials were designed based on the shape of monoclinic crystals:uniaxial oblique structure(UOS)and biaxial oblique structure(BOS).Through finite element simulation and experimental research,the theoretical models of UOS and BOS were verified,and their sound absorption mechanisms were *** the same time,the influence of multi-cavity composites on sound absorption performance was analyzed based on the theoretical model,and the influence of structural parameters on sound absorption performance was *** research results show that,in the range of 100-2000 Hz,UOS has three sound absorption peaks and BOS has five sound absorption *** frequency range of the half-absorption bandwidth(α>0.5)of UOS and BOS increases by 242% and 229%,*** with traditional microperforated sound-absorbing structures,the series and parallel hybrid methods significantly increase the sound-absorbing bandwidth of the sound-absorbing *** research has guiding significance for noise control and has broad application prospects in the fields of transportation,construction,and mechanical design.

摘要：广告设计课程是高校设计类专业的一门重要课程。好的广告创意使广告作品更为独特和引人注意,高校应该加强对广告设计专业学生创意思维的培养,提升其实践能力,使其能够设计出有创意的广告精品。针对当前广告设计教学实践中存在的观念落后、模式单一、实践性不足和内容缺乏时代性等问题,文章以广告设计竞赛为出发点,就高校广告创意思维教学实效性的提升提出了建议和意见。

摘要：A novel Uralic(U)-rich linear-hyperbranched mono-methoxy poly(ethylene glycol)-hyperbranched polyglycerol-graft-Uralic(mPEG-HPG-g-U)nanoparticle(NP)was prepared as drug carrier for antitumor methotrexate(MTX).Due to the H-bond interaction of U with MTX and hydrophobic interaction,this NP exhibited high drug loading efficiency of up to 40%,which was significantly higher than that of traditional NPs based on U-absent copolymers(<15%).In addition,MTX-loaded mPEG-HPG-g-U NPs also demonstrated an acidity-accelerated drug release behavior.

摘要：首先,基于“双碳”战略目标的提出以及物流企业低碳转型的发展趋势,以多中心冷链物流绿色车辆路径问题为研究对象,以碳排放成本、配送成本和时间窗惩罚成本之和最小化为优化目标,建立考虑联合配送和碳交易机制的冷链物流模型;然后,针对遗传算法局部搜索能力差、收敛速度慢等缺点,设计一种具有变邻域搜索操作和动态灾变机制的多种群遗传算法,以标准算例集验证该算法在寻优能力、稳定性、收敛速度等方面的优势;最后,通过实验验证所提出模型的有效性,并从联合配送、决策目标、碳交易机制等多角度进行分析,为冷链物流企业和政府提供管理启示.

摘要：Pullout resistance of a soil nail is a critical parameter in design and analysis for geotechnical engineers. Due to the complexity of field conditions, the pullout behaviour of cement grouted soil nail in field is not well investigated. In this work, a number of field pullout tests of pressure grouted soil nails were conducted to estimate the pullout resistance of soil nails. The effective bond lengths of field soil nails were accurately controlled by a new grouting packer system. Typical field test results and the related comparison with typical laboratory test results reveal that the apparent coefficient of friction （ACF） decreases with the increase of overburden soil pressure when grouting pressure is constant, but increases almost linearly with the increase of grouting pressure when overburden pressure （soil depth） is unchanged. Water contents of soil samples at soil nail surfaces show obvious reductions compared with the results of soil samples from drillholes. After soil nails were completely pulled out of the ground, surface conditions of the soil nails and surrounding soil were examined. It is found that the water content values of the soil at the soil/nail interfaces decrease substantially compared with those of soil samples extracted from drillholes. In addition, all soil nails expand significantly in the diametrical direction after being pulled out of ground, indicating that the pressurized cement grout compacts the soil and penetrates into soil voids, leading to a corresponding shift of failure surface into surrounding soil mass significantly.

摘要：中国的社交媒体正在成长为一个具有特色的独立"王国",并且赢得数以亿计的用户。依据使用与满足理论,研究影响社交媒体广告态度的各种因素,特别聚焦中国市场上不同地域和不同世代的调节作用,具有重要意义。该调查覆盖中国大陆4172个样本,发现自我-品牌一致性是影响中国消费者对社交媒体广告态度的最重要的因素。结果还显示了社交媒体广告态度及其影响因素间的关系在不同区域和代际间的差异。文中将结果与先前美国研究结果做比较,解释了文化间的一些差异。