摘要：To promote the visualisation and informatisation of the construction process of precast foamed lightweight concrete wallboards(PFLCWs),from the analysis of the construction requirements of PFLCWs,three key construction technologies based on building information modelling(BIM),namely,parameterised modelling for the PFLCW layout design,drawing generation to draw the PFLCW layout and quantity statistics for extracting PFLCW quantities,are ***,a reinforced concrete(RC)frame infilled with PFLCW is considered the test model to verify the feasibility of the aforementioned *** results show that PFLCW layout design can be accomplished rapidly and visually using parameterised modelling *** PFLCW layout diagram can be generated directly using drawing generation *** proposed quantity statistics technology enables the automatic export of PFLCW bills of *** built parameterised model helps construction workers rapidly and intuitively understand the specific layout details of ***,the generated layout drawing and the bills of quantities based on the parameterised model can guide the production and on-site installation of *** research conclusions can serve as a practical guide and technical support for PFLCW engineering applications.

摘要：在方家山核电厂水泥固化线调试过程中,进行了浓缩液、废树脂固化和废过滤器芯固定试验。试验中发现了水泥固化配方、设备设计、设备可靠性等方面存在的问题,分析了问题的原因,提出应研制出兼顾泥浆流动性、固化体性能、废物最小化和适合桶外搅拌的配方;还应从设备设计、选型和加工制作多方面优化和提升设备的可靠性;在核电厂应用前应进行充分的工程验证,提高固化线桶外搅拌工艺的可靠性。

摘要：主要探究了在传感器采样频率较高(如高速相机、位置传感器)、倾斜镜动态特性不可忽略的情况下,如何基于实验数据建立开环倾斜镜系统的动态耦合数学模型的问题。分析了系统的动态特性以及输入与输出之间的耦合,提出了基于倾斜镜系统的输入输出数据、采用子空间辨识算法建立倾斜镜系统动态耦合数学模型的方法,并通过实验评估了模型的准确性和建模方法的可行性。实验结果显示,通过该方法所建立的倾斜镜动态耦合模型的VAF值达到95%,模型准确性相比传统的静态模型有了很大提高,验证了建模方法的可行性。研究成果可用于闭环倾斜镜系统优化反馈控制器的设计,提高系统对于光束偏移矫正的性能。

摘要：为研究传统民居木结构十字形半榫节点及其角钢加固后的抗震性能,参照川西地区实际民居,按照1∶1.33的缩尺比例,制作了1个半榫节点和4个具有不同设计参数、采用角钢加固的半榫节点,并对其进行低周往复加载试验,得到了加固前后半榫节点的破坏形态、弯矩-转角滞回曲线、骨架曲线、刚度和耗能能力等抗震性能指标。结果表明:未加固半榫节点发生拔榫破坏,滞回曲线有明显的捏拢效应;加固节点所用角钢在限制榫头拔出的情况下,改变了十字形半榫节点的破坏形态,节点破坏时榫头折断、角钢变形较大,滞回曲线较为饱满;加固后节点的承载能力得到了不同程度的提升,刚度退化现象得到明显改善,节点变形能力有所提高,而耗能能力较未加固节点并无明显降低;单侧角钢加固对节点负向受拉的承载力比正向受压的承载力提高作用更加明显,而双侧角钢加固节点正负向承载力基本一致;单侧加固节点的刚度比双侧加固节点的刚度稍小,且随着角钢厚度的增大,节点刚度的提高作用越明显;而角钢肢长变化对节点的刚度影响不大。

摘要：为有效预防放射性废液贮槽发生放射性物质泄漏,采用液位测量和报警系统进行监测。将增量报警技术与传统技术相结合,设计了多样化液位报警系统。测试数据和实用效果表明:报警系统功能强大、性能可靠精准,可在贮槽内任意液位高度发生异常液位变化时,准确预警,自动记录报警信息,有效地预防放射性物质泄漏。

摘要：Utilizing single atom sites doping into metal oxides to modulate their intrinsic active sites,achieving precise selectivity control in complex organic reactions,is a highly desirable yet challenging ***,identifying the active site also represents a significant obstacle,primarily due to the intricate electronic environment of single atom site doped metal ***,a single atom Cu doped TiO_(2)catalyst(Cu_(1)-TiO_(2))is prepared via a simple“colloid-acid treatment”strategy,which switches aniline oxidation selectivity of TiO_(2)from azoxybenzene to nitrosobenzene,without using additives or changing solvent,while other metal or nonmetal doped TiO_(2)did not *** mechanistic investigations and DFT calculations unveil that Ti-O active site is responsible for triggering the aniline to form a new PhNOH intermediate,two PhNOH condense to azoxybenzene over TiO_(2)*** for Cu_(1)-TiO_(2),the charge-specific distribution between the isolated Cu and TiO_(2)generates unique Cu_(1)-O-Ti hybridization structure with nine catalytic active sites,eight of them make PhNOH take place spontaneous dissociation to produce *** work not only unveils a new mechanistic pathway featuring the PhNOH intermediate in aniline oxidation for the first time but also presents a novel approach for constructing single-atom doped metal oxides and exploring their intricate active sites.

摘要：目的:探讨加压空心螺纹钉治疗青壮年股骨颈骨折的临床疗效。方法:56例患者行牵引后在C型臂X线机透视下进行加压空心螺纹钉治疗。结果:加压螺钉的设计符合生物力学的要求,其承载能力大,不但具有抗压、抗扭、抗弯的特性,又能加压使骨折断端紧密接触,在骨折处产生有利于骨折愈合的应力刺激,促进骨折愈合及股骨头再血管化。结论:加压空心螺纹钉治疗青壮年股骨颈骨折操作简单,创伤小,出血少,固定牢固,愈合率高,临床疗效较好。

摘要：在对影响货车集结参数若干因素分析基础上,以大连市金州编组站为例,采用Anylogic仿真软件建立了下行编发场货车集结过程仿真模型.设计仿真实验方案,车组到达间隔时间和分析车组大小对货车集结参数的影响.仿真结果表明,车组到达间隔时间与货车集结参数成指数上升关系,车组大小与货车集结参数成线性反比关系.

摘要：现代仪器分析课程内容涉及面广、专业性强且实践要求高,如何设计问题以引导学生的创新思维发展和提高创新能力是每位教师需要面临的问题.本文结合陕西师范大学食品学院实际教学经验,通过思维型教学模式创新与实践的探索研究,希望为研究型和应用型人才的培养提出指导意见.

摘要：为实现生物活体细胞的高分辨率定量相位成像,设计和组建了一套白光(卤素灯)作为照明光源的衍射显微相位成像系统.在未放置样品的时候测得系统的空间噪声低于0.60nm,时间噪声低于0.04nm;用标准聚苯乙烯微球作为样品验证了系统测量的准确性.最后,以活体血红细胞与大肠杆菌细胞为样品,获得了准确的定量相位像;并对霉菌孢子进行了长时间的观察,获得了其在水中萌发的序列动态定量相位像.实验结果表明,建立的系统成像精度高,且具有长时间观察生物活细胞的能力.