摘要：为研究风化岩土质深基坑在开挖过程中的变形演化规律,以长沙市某地铁深基坑工程为依托,用PLAXIS 3D软件建立三维数值模型,分析基坑开挖深度、载荷位置、载荷大小对深基坑开挖过程变形的影响规律。研究结果表明:风化岩土质地铁基坑在开挖过程中,其形变主要发生在土层。当载荷20 kN/m^(2)且距离基坑为5 m时,围护桩的最大偏移0.72 mm;当载荷达到60 kN/m^(2)时,地表的最大沉降为70.90 mm。该结果可为类似风化岩土质基坑设计提供参考。

摘要：Heterostructured photocatalysts provide an effective way to achieve enhanced photocatalytic performances through efficient charge *** both wide-and narrow-band-gap photocatalysts have been widely investigated,the charge separation and transfer mechanism at the contacting interface of the two has not been fully ***,a novel SrTiO3/BiOI(STB)heterostructured photocatalyst was successfully fabricated by using a facile *** heterostructure in the photocatalyst extends the photoabsorption to the visible light range,and thus,high photocatalytic NO removal performance can be achieved under visible light irradiation.A combination of experimental and theoretical evidences indicated that the photogenerated electrons from the BiOI semiconductor can directly transfer to the SrTiO3 surface through a preformed electron delivery *** electron transfer was expected between the SrTiO3 and BiOI surfaces under light irradiation,and leads to efficient ROS generation and thus a high NO conversion ***,in situ diffused reflectance infrared Fourier transform spectroscopy revealed that STB can better inhibit the accumulation of the toxic intermediate NO2 and catalyze the NO oxidation more *** work presents a new insight into the mechanism of the interfacial charge separation in heterostructures and provides a simple strategy to promote the photocatalytic technology for efficient and safe air purification.

摘要：针对政务数据建设中存在的政务App满意度低和政务数据资产创新应用少的两大挑战,通过引入生成式AI等人工智能技术,探讨了政务数据平台的用户满意度提升策略及政务数据资产的有效利用方法,推动政务数据运营的升级,使政务App更加智能和便捷。具体则聚焦数据要素驱动的政务数据平台运营机制的智能化改进,系统性地设计了政务数据平台运营创新的理论机制和技术架构,提出了创新且智能化的数据应用,包括政务App评论分析、政务数据支撑报告、智能客服、个性化服务及精准化检索等5大应用,并提出了加速实现政务数据管理现代化的政策建议,旨在促进政务数据共享和开放,培育政务数据要素市场,有助于实现数字中国战略目标。

摘要：6支链并联平台存在着复杂的位置约束,并且当控制算法失效时对机械结构容易造成损坏,因此,针对一种3UPU-UP并联平台对其进行运动学可操作性与工作空间分析。首先通过矢量法与运动学的分析,得出了3UPU-UP并联平台运动学模型,以此为基础,首次将串联机械臂可操作度的评价指标与3UPU-UP并联平台的机构结构特性相结合,对3UPU-UP并联平台的可操作度进行了计算、分析和可视化处理;并将蒙特卡洛法与正运动学相结合对并联平台的工作空间进行了计算、分析和可视化处理。能够更加直观、完整表述并联平台的可操作度和工作空间。研究成果为3UPU-UP并联平台的设计提供了理论依据并证实其理论上的可行性。

摘要：船用压缩机的减振降噪以往主要是通过增加减振装置、加强筋板或优化曲柄连杆结构等途径解决。基于船用压缩机减振降噪的需求,设计开发了曲柄圆滑块传动机构,从传动结构角度来降低船用压缩机的振动噪声。建立了机构的三维模型,并基于含间隙的运动副对传动结构做了仿真分析。

摘要：为发挥履带运输车更高的效能与价值,引进机器视觉,开展履带运输车智能视频监控报警方法的设计研究。根据运输车的现场作业环境与工作需求,进行CCD工业相机的选型,确定需要采集的视频数据,设计基于机器视觉的履带运输车进行视频智能采集;利用集成机器视觉后履带运输车智能视频分析模块,进行监控视频干扰信息过滤处理;引进边缘算子,自动识别视频中的关键信息,以此辨识不同物体,实现视频源中价值信息的提取与事故现场定位、预警。实例应用实验结果表明:在实际应用中,设计的方法可以满足运输车智能视频监控报警需求,且报警具有较强的即时性。

摘要：To optimize the electronic structure of photocatalyst,a facile one‐step approach is developed for the simultaneous realization of Zn‐doping and surface oxygen vacancies(SOVs)formation on SnO_(2).The Zn‐doped SnO_(2)with abundant SOVs exhibits efficient and stable performance for photocatalytic degradation of toluene under both low and high relative *** and theoretical calculations results show that the synergistic effects of Zn‐doping and SOVs on SnO_(2)can considerably boost the charge transfer and separation *** the in situ DRIFTS and theoretical calculations methods,it is revealed that the benzene ring of toluene is opened at benzoic acid on the SnO_(2)surface and selectively at benzaldehyde on the Zn‐doped SnO_(2)*** implies that Zn‐doped SnO_(2)photocatalysts shorten the pathway of toluene degradation,and toxic intermediates can be significantly *** work could provide a promising and sustainable route for safe and efficient removal of aromatic VOCs with photocatalytic technology.

摘要：Three series of novel anti-immunodeficiency virus 1 （HIV-1） dual （RT/1N） inhibitors were rationally designed by introducing a functioning diketo acid （DKA） into pyridin-2-one scaffold. To efficiently analyze inhibitory activity, these compounds were screened against HIV-1 RT and IN respectively via surface plasmon resonance （SPR）, and active compounds were subsequently evaluated by enzyme assay. It was noteworthy that compound A2 exhibited moderate activity against both HIV-1 RT and IN. This result provided information for further development of pyridinone analogues as potent dual HIV-1 inhibitors.

摘要：目的:对穿心莲糖苷水解酶(ApGH)基因进行克隆、生物信息学分析、原核表达和相对表达量分析。方法:取穿心莲新鲜叶片,提取RNA并反转录为互补脱氧核糖核酸(cDNA)作为模板,以穿心莲转录组中筛选到的糖苷水解酶ApGH基因开放阅读框(ORF)设计特异性引物,进行聚合酶链式反应(PCR)扩增,经测序后获得的基因序列利用生物信息学软件预测基因编码蛋白特征,构建原核表达载体在大肠埃希菌中诱导表达目的蛋白质,并利用实时荧光定量PCR分析ApGH基因的表达模式。结果:克隆所得ApGH基因的ORF全长1734 bp,编码577个氨基酸(GenBank登录号:OR887606)。ApGH为稳定亲水蛋白质,无信号肽和跨膜结构域,属于糖苷水解酶家族;系统进化分析表明,ApGH归属于GH1家族。将ApGH基因构建到原核表达载体HIS-MBP-pET28a上,在大肠埃希菌Transetta(DE3)中成功表达出重组蛋白质。实时荧光定量PCR检测结果表明,ApGH基因在叶中表达量最高,茎和根中表达量较低。结论:克隆得到穿心莲ApGH基因并对其蛋白质序列特征进行了系统分析,证明其在大肠埃希菌中成功表达重组蛋白质,且主要在穿心莲叶中表达。研究结果为进一步探索穿心莲糖苷水解酶的催化功能提供了依据。

摘要：水下仿生软体机器人在水底环境勘测,水下生物观测等方面具有极高的应用价值.为进一步提升仿章鱼臂软体机器人在特殊水下环境中控制效果,提出一种自适应鲁棒视觉伺服控制方法,实现其在干扰无标定环境中的高精度镇定控制.基于水底动力学模型,设计保证动力学稳定的控制器;针对柔性材料离线标定过程繁琐、成本高,提出材料参数自适应估计算法;针对水下特殊工作条件,设计自适应鲁棒视觉伺服控制器,实现折射效应的在线补偿,并通过自适应未知环境干扰上界,避免先验环境信息的求解.所提算法在软体机器人样机中验证其镇定控制性能,为仿生软体机器人的实际应用提供理论基础.