全站仪电子记录方案设计与实现

提出了用于全站仪电子记录的设计方案,介绍了程序设计主要过程及其功能,分析了本方案的优点,并对相关问题进行说明.     

嵌入式精密三角高程测量算法设计与实现

基于嵌入式操作系统和开发环境,利用精密三角高程测量算法,进行了精密三角高程测量的功能设计和算法实现,并通过某桥梁工程的应用对算法实现进行了数据分析和精度评测实验。结果表明,在地形起伏变化和坡度较大的区域,采用本文算法,精密三角高程测量可以达到水准测量相当的精度。通过合理设定棱镜常数、观测距离、测回数目等关键技术参数,嵌入式精密三角高程测量在地形复杂地区工程测量应用中,完全可以代替传统水准测量技术。     

聚四氟乙烯表面PDA/TiO2复合薄膜的构建及其细胞响应性

聚四氟乙烯（PTFE）具有良好的生物稳定性,是一种被广泛应用的生物材料。利用聚多巴胺（PDA）化学及原位共沉积法,在PTFE基板表面沉积制备复合薄膜,以改善其表面的亲水性和细胞响应特性。研究结果显示,由PDA和TiO₂构成的薄膜可以有效地沉积与PTFE基板表面。薄膜均匀且与基板结合牢固,剪切强度可达23.5 MPa。薄膜中的TiO₂含量可以通过沉积液中的TiO₂水溶胶加入量调节。具有薄膜的PTFE表面成纤维细胞和成骨细胞响应性较之PTFE基板显著改进,1 d的细胞粘附试验和3 d的细胞增殖试验均显示涂层表面细胞数量显著高于无涂层的PTFE。这种在PTFE表面构建二氧化钛涂层的方法简单易行,在PTFE植入体表面修饰方面具有较好的应用前景。     

Integration of construction control and pile setup into load and resistance factor design of piles

Regionally developed Load and Resistance Factor Design (LRFD) recommendations for bridge pile designs are enhanced by integrating the construction control capability of dynamic analysis methods and the recently developed pile setup quantification method in the calibration process. Using a high quality, electronic Pile LOad Test (PILOT) database and 10 recently completed full-scale pile tests, resistance factors were developed using a reliability theory for a locally calibrated static analysis method and two dynamic analysis methods: the Wave Equation Analysis Program (WEAP) and the CAse Pile Wave Analysis Program (CAPWAP). Pile design efficiency was improved by minimizing the discrepancy between design and field pile resistances through a proposed probability-based construction control method. The efficiency of bridge foundations was further increased by incorporating the economic advantages of pile setup into the LRFD recommendations. Compared with recommendations made by Paikowsky et al. (2004), Canadian Engineering Society (2006) and American Association of State Highway and Transportation Officials (2003), regionally-calibrated resistance factors were improved.     

Investigating the driving factors of regional CO2 emissions in China using the IDA-PDA-MMI method

In this paper, we systematically summarized existing research on the driving factors of CO₂ emissions and found that changes in technology gap may be one of the key driving factors of CO₂ emissions. Technology efficiency, technology progress, and technology gap were decomposed by using the Meta-frontier Malmquist index (MMI), which was then combined it with the Index Decomposition Analysis (IDA) and the Production-theoretical Decomposition Analysis (PDA). Our framework was applied to Chinese provincial data from 2000 to 2016. We identified nine factors to explain changes of regional CO₂ emissions. Results demonstrate that economic scale, energy technology efficiency, and output technology efficiency increased CO₂ emissions in Eastern, Central, and Western regions of China, with the economic scale being the largest contributor. Energy structure, energy intensity, energy technology progress, and output technology progress decreased regional CO₂ emissions, with the energy technology progress playing the strongest role. Energy technology gap and output technology gap led to an increase in CO₂ emissions in Central China and, to a lesser extent, in Western China. The effects of each driving factor on CO₂ emissions varied across provinces. Finally, policy implications are suggested to reduce CO₂ emissions in China.     

基于PDA的模糊逻辑故障诊断智能终端设计

为了克服工程装备现场复杂环境下的故障诊断困难,开发了基于模糊逻辑的工程机械故障诊断终端。探讨了基于模糊关系逻辑的故障诊断系统在PDA上的实现方法,简要介绍了基于模糊逻辑关系方程的智能诊断原理。设计了智能诊断终端的结构,系统地阐述了诊断终端的应用及功能实现过程。实践表明:该诊断终端对工程机械故障的现场检测与快速诊断具有非常大的作用。     

基于掌上电脑水准测量程序的开发应用

掌上电脑的水准测量程序是在WINDOWS Mobile环境下,用EVC语言开发的,能够进行三、四等水准测量和水文水尺校测工作,具有多种测验作业方式,现场数据输入方便、快捷,数据检验自动进行,数据存储记录安全,自动生成成果表格,现场可查看测量成果,程序算法设计按照国家水准测量规范要求进行,能够满足水文站中的水准测量和水尺校测工作的要求。     

激光动态分析方法(PDA)在建筑、城市空间测量中的应用

激光动态粒子分析(PDA)是目前公认的最有效的同时测量粒子尺寸和速度的技术。该技术已广泛地应用于物理、动力等各个行业,但尚未应用于建筑领域。为此,本文提出了一种能够对建筑、城市空间进行精确测量的激光动态分析技术,并设计制作了相应的设备装置。同时,以上海同济新村居住小区为试验对象建立起模拟结构,运用PDA技术成功进行了测试。试验结果表明该技术方法有效、能够实现对建筑、城市空间进行精确测量,从而对整个建筑、城市空间进行有效的设计和分析。     

基于PDA的智能巡检系统的设计

提出了一种基于PDA来提高巡检工作效率,从而有效监控设备工作状态的智能巡检系统的设计方法。该方法利用射频识别自动进入相应的参数记录界面,并在记录设备的工作参数信息后,通过GPRS自动传输数据,以便为巡检工作提供方便。     

Bioinspired Fabrication of Insensitive HMX Particles with Polydopamine Coating

The development of a facile method for large scale production of insensitive HMX particles is of great importance for energetic materials, especially for insensitive munitions. Inspired by mussels, HMX particles with a thin, robust, wettable and uniform coating based on the self‐polymerization of dopamine were prepared by one‐step solution stirring processes in the study. The as‐prepared HMX@PDA particles showed stable shape, size, and polymorphy compared with original HMX particles. With PDA (polydopamine) coating, the HMX@PDA particles exhibited better wettability, which could improve the adhesive properties between particles and other liquid components in a PBX (plastic bonded explosive). Furthermore, the mechanical sensitivities were decreased for the HMX@PDA particles because of the uniform and smooth PDA coating decreasing the hot spots on the surface of the HMX particles. HMX@PDA particles produced by a facile scalable process might provide a promising substitute for sensitive HMX particles to enhance the safety and adhesive properties when used in PBX.