特种越野车关键部件疲劳分析方法的探索

通过对某特种越野车进行道路试验,获取不同工况下关键部件动应力的时域、频域信息;在此基础上,对传统时域疲劳分析方法和频域的各种不同疲劳分析方法进行对比。     

溶岩地区桩基础施工技术问题的探讨

石灰岩地区地质情况较复杂,对桥梁的基础施工带来困难和不利影响。介绍花清高速公路高架桥在石灰岩溶岩地区的桩基础施工技术。     

Geometric calibration algorithm of polarization camera using planar patterns

Polarization pattern provides additional information besides spectral signatures. It can be used in many applications, such as navigation, defect detection and object identification. A novel polarization camera composed of four synchronized cameras is proposed, and it can realize real-time polarization measurement. This study particularly concentrates on the geometric calibration of the system. The projection model is analyzed and the multi-camera calibration algorithm is proposed. Firstly, each camera is calibrated separately using planar patterns, and then the geometric calibration algorithms are performed. Due to the geometrical constraint, a global optimization method results in smaller estimation uncertainties. A mean rotation error of 0.025° and a mean translation error of 0.26mm are achieved after geometric calibration. The images are rectified to establish a correspondence among cameras and are combined to acquire the polarization measurement. The polarization pattern of the skylight is measured by the system and the results are consistent with the previous studies.     

轿车万向节星型套精锻集成智能设计系统

研究了轿车万向节星型套集成智能设计系统的开发过程。利用专家系统与神经网络相结合的智能技术建立了GC/GD-ANN-ES集成智能设计系统模型。采用CSG树方法进行星型套锻件几何造型;利用规则与框架相结合的方法建立子知识库,并通过黑板推理与正向推理相结合的推理机制建立了ES子系统;应用模糊神经网络技术进行了回弹量预测。通过实际生产验证了集成智能设计系统的可靠性。     

SIMPLE METHOD OF PUNCHING AND RE-LOCATING TISSUES FOR MANUAL CONSTRUCTION OF TISSUE MICROARRAY

A series of human tissue samples and cultured cell lines were formalin-fixed and paraffin-embedded. Specimen cylinder ( 1.2 - 1.8mm) were punched by a modified bone marrow biopsy needle and arrayed on a recipient paraffin block. Microscopic analysis on the sections from this tissue microarray (TMA) block demonstrated that the spots of tissues and cells were well preserved, and the cultured cell samples were successfully embedded from 5 × 104 to 2 × 105 in number. These TMA sections were also suitable for immunohistochemistry and RNA in situ hybridization.     

影响公路隧道开挖造价的因素

公路隧道招标挖方计价常见5种方式。对地质条件、隧道长度等对隧道开挖造价的影响进行分析：细目分类较多,隧道开挖总造价较易控制,造价相对较低;开挖细目少对业主控制造价不利。推荐采用将土方、软石、次坚石、坚石开挖及弃方超运分列工程细目单独计价。     

铁路重载货车转向架技术应用探究

铁路重载货车转向架为铁路重载运输提供保障.由于铁路重载货车的重载质量不断增加,运行的速度越来越快速,从而造成了轮轨的损坏,这就需要加强对转向架技术的深入研究.对我国铁路重载货车转向架技术发展的历程进行阐述,详细分析了铁路重载货车转向架技术的应用,并对铁路重载货车转向架的发展趋势进行阐述.     

道路软土地基处理方法分析

珠海市香洲洪湾工业片区内为软弱地基,满足不了上部荷载对路基的要求,将会导致路基在通车后产生较大沉降和地下管线的破坏。为保证路基的稳定,提高地基土强度和变形模量,以满足上部荷载对地基土承栽力的要求,提出了对场区内路基采取加固处理方案。目前针对软弱地基的不同构成有很多不同的处理方法,本文结合工程实际情况主要介绍袋装砂井堆载预压处理软弱地基的方法。     

高速公路管理部门规避临时用工经济风险的方法研究

介绍了某省高速公路管理局通过建立经济责任担保制,规避临时用工的经济风险的相关做法。为我们有效解决合法用工和防范用工单位经济损失之间的矛盾提供了一种全新的解决思路。     

某发动机缸盖碗型塞密封失效分析及解决案例研究

碗型塞又名堵塞,因碗型塞的结构相对简单,可靠性高,价格便宜,广泛应用于内燃机.通过碗型塞与孔的过盈配合,及密封胶双重作用进行密封,碗型塞作为发动机常见的水道,油道密封方式,常见问题主要为漏液,因其结构简单,漏液问题根因也常常容易忽视;文章主要围绕发动机碗型塞漏水问题整改进行了理论分析和试验验证,为问题解决提供参考.