经皮穿刺金蒸气激光加化疗治疗肝脏恶性肿瘤疗效观察

肝脏恶性肿瘤采用国产玻璃型金蒸气脉冲激光经皮穿刺插入照射,加用局部丝裂霉素治疗,在较短时间内有明显肿块缩小,伴有效地延长寿期,减少痛苦,并且较为安全、简便,值得临床使用。     

PCM-A管道多功能切割机在管道施工中的应用

PCM—A管道多功能切割机是针对我国长输管线施工中，在特殊地段、特殊焊缝组对时需要重新在现场加工坡口而专门研制开发的特种施工设备。该设备重点解决了目前传统的链轨式、磁轮式、钢带式普通管道切割机在绕管子圆周切割运动后回到初始切割时轨迹不重合而造成修口难的工程实际难题。     

高速IC设计技术

本文叙述了实现高速ＩＣ的设计技术，包括延时分析技术，高层次综合，逻辑综合延时优化技术，延时优化驱动布局与总体布线技术，控制时钟偏差技术以及各种技术的结合应用等。它覆盖了这一领域的前沿动态。     

电动式和热力式冷水机组的经济技术比较

文中分析了各类冷水机组的特点，比较了电动和热力式冷水机组的优缺点，并从初投资、一次能耗，二次能耗，运行成本等方面进行了详细的经济比较。通过经济技术综合分析，指出电动冷水机组优越于热力式冷水机组。     

FRACTURE MECHANICS APPLICATIONS TO DRILLING AND BLASTING

Abstract— This paper gives a brief review of research in rock fracture mechanics as conducted at the Fracture and Photo-Mechanics Laboratory (FPML) at Vienna University of Technology. The mechanisms pertaining to percussion drilling and blasting are investigated, with specific reference to the application of fracture mechanics. In order to gain an improved understanding of the mechanisms controlling rock fragmentation, a multidisciplinary approach is followed which includes laboratory experiments conducted in plexiglass and rock, in-situ field experiments and analytical/numerical modelling techniques.
Field experiments revealed that percussively drilled holes exhibit a very shallow region of damaged rock. An analytical model to simulate damage accumulation and crack initiation due to elastic waves generated by impacting drill bits was developed. This model, based on damage and fracture mechanics, was incorporated into a numerical finite difference code. Fracture and damage mechanics parameters are related to the moment tensor which is determined experimentally by means of acoustic emission. Small scale model blasts were used to investigate the blast-induced fractures in the near-borehole zone as well as in the far field. Analytical and numerical investigations give insight into stress wave and gas driven fracturing. The applicability of the dynamic finite difference program SWIFD to the interaction between stress waves and cracks is illustrated.     

嵌套边界的非均匀格子Boltzmann方法

基于区域分裂技术与非平衡态外推技巧，设计了一种嵌套边界的非均匀网格算法。该算法的基本思想是：将流体流动区域分解成若干个边界相互嵌套的子区域，在每个子区域内部的分布函数使用均匀网格的格子Boltzmann方法求解，区域边界的分布函数通过粗细网格转换与非平衡态外推获得。使用该方法对二维顶盖驱动方腔流动问题进行数值模拟，计算结果与其他方法的结果相吻合，表明该方法可行的、有效的，并且在高雷诺数(Re)下有较好的稳定性。     

计算机辅助直接放矿系统研究

就中条山有色金属公司铜矿峪矿采用新的采矿方法后，在转产过程中所遇到的装矿设施与运输设备不相适应的问题，进行了细致的分析，找出了问题所在，探讨了解决这些问题的方法，并基于当前的条件，选择了比较可行的方案。     

Volume fraction gradient-induced flow patterns in a two-liquid phase mixing layer

This paper presents experimental and numerical results related to the dynamic behavior of a two-liquid phase mixing layer induced by a gradient of phase fraction at the flow inlet. A particle image velocimetry-based technique has been used together with a refractive index matching method in order to measure the volume phase fraction and the continuous phase velocity in the two-dimensional (2D) flow. The analysis of experimental results reveals the strong unsteady feature of the flow and the development of large-scale coherent structures. Experimental data have been compared to numerical simulations obtained using both a two-fluid model and a single-fluid mixture model (where only the density difference is accounted for). The similarities and discrepancies between numerical and experimental results provide an understanding of the relative importance of variable density effects compared to the two-phase interfacial exchanges in the momentum and the turbulent transport.     

磁传动增压注水泵磁力传动器的设计

现有增压注水设备所面临的主要问题是高压动密封，目前国内对高压动密封尚无很好的解决方法。采用磁力传动技术，将高压动密封变为静密封，很好地解决了现有注水设备密封结构的弊端，文章阐述了磁传动增压注水泵磁力传动器的结构原理，磁路设计，隔套设计及轴承设计等关键技术。     

螺杆泵井电机降容技术

地面驱动螺杆泵井多配置Y系列三相异步电机,考虑到启动扭矩的影响,现场电机配置功率明显偏高,使电机负载率低,增加了无功损耗.对此,在理论分析和现场测试的基础上,根据螺杆泵井启动扭矩和功率的变化特点,引进了双功率电动机,与Y系列电机相比,节电可达10%以上.28口井的现场应用表明,可有效降低装机功率,降低生产能耗,提高螺杆泵采油系统效率,具有较好的推广应用前景.