立柱加固型框架大楼的爆破拆除

采用定向控制爆破技术拆除立柱加固型7层框架大楼。为了彻底炸毁加固立柱,确保大楼顺利定向倾倒,通过多次爆破试验确定了炸药单耗、布孔参数和装药结构。为了控制大楼塌落时的触地震动,采取了秒差分区爆破、空中解体、铺垫缓冲层和开挖减震沟等技术措施。爆破过程中进行了震动监测。此外还介绍了起爆顺序、安全防护措施及爆破结果。     

Reconfigurable hardware implementation of a phase-correlation stereoalgorithm

This paper describes the implementation of a stereo-vision system using Field Programmable Gate Arrays (FPGAs). Reconfigurable hardware, including FPGAs, is an attractive platform for implementing vision algorithms due to its ability to exploit parallelism often found in these algorithms, and due to the speed with which applications can be developed as compared to hardware. The system outputs 8-bit, subpixel disparity estimates for 256× 360 pixel images at 30,fps. A local-weighted phase correlation algorithm for stereo disparity [Fleet, D. J.: {Int. Conf. Syst. Man Cybernetics 1:48–54 (1994)] is implemented. Despite the complexity of performing correlations on multiscale, multiorientation phase data, the system runs as much as 300 times faster in hardware than its software implementation. This paper describes the hardware platform used, the algorithm, and the issues encountered during its hardware implementation. Of particular interest is the implementation of multiscale, steerable filters, which are widely used in computer vision algorithms. Several trade-offs (reducing the number of filter orientations from three to two, using fixed-point computation, changing the location of one localized low-pass filter, and using L1 instead of L2 norms) were required to both fit the design into the available hardware and to achieve video-rate processing. Finally, results from the system are given both for synthetic data sets as well as several standard stereo-pair test images.     

帧中继交换技术

本文论述了帧中继交换的概念、标准，结构、特点网络式样及在互连网中的应用。     

A frame-based knowledge representation model and its mapping to nested relations

The first part of this paper introduces the basic constructs of a frame representation model and gives a formal definition for them. Subsequently the nested relational model (NF²) is described as an extension of the classical relational model to support relation-valued attributes. In the second part of this paper both models are compared with each other and a mapping of frame representation structures to NF² structures is specified. The structural similarities between frames and NF² relations are made clear and it is shown that their main difference is due to the type polymorphism introduced by the concept hierarchy of the frame model. This causes type collisions to occur in the strictly typed NF² model when frames are directly mapped to NF² structures. Two solutions to this problem are suggested and compared. The paper concludes with a reformulation of query operations of the frame model in terms of NF² algebra operations.     

建立福州市、县级行政区域界线信息管理系统的探讨

结合福州市行政区域界线勘查工作已结束的实际和社会信息化发展的趋势，提出建立该市市、县级行政区域界线信息管理系统的重要性，对该系统的基本框架、实施方案、建立步骤及与“数字福建”接轨等问题进行了初步讨论，提出了建议。     

转运站框架式厂房的爆破拆除

合山电厂转运站待拆五层钢筋混凝土框架式厂房西侧与被保护的引风机房相隔仅 0 3m ,北侧与工具房相连 ,南侧与需要保护的油池相邻。爆破切口布置在二层 ,并把最后一排柱的爆破部位提高到引风机房顶部以上 0 5m处 ,避免了后坐对引风机房的影响。通过预处理 ,将厂房与工具房分离。架设防护结构 ,阻挡飞石 ,保护了油池。文中介绍了爆高和爆破参数的选择、预处理、起爆破网路设计和安全防护措施。     

ATM与帧中继互连技术

ＡＴＭ技术是ＩＴＵ－Ｔ推荐的Ｂ－ＩＳＤＮ交换技术，而帧中继在提供广域网业务方面很成功。因此，在ＡＴＭ发展的初期不可避免地会与帧中继技术并存。本文阐述了ＡＴＭ与帧中继网络互加和业务互连的相关技术及其存在的问题。     

拉动内需要培育农村市场

农村市场是个庞大的消费市场,农民是消费的最大阶层。拉动内需不能不启动农村市场,不能没有农民的参与。     

引线框架用铜合金QFe2.5的退火性能

分析对比了QFe2．5合金的红锭和黑锭在不同温度退火后的高、低倍金相组织与力学性能。结果表明：由于第二相分布较均匀，退火后红锭试样的性能变化比较平缓，高温下晶粒较小，轧制时开裂较少；由于Fe的不均匀分布，有较大的铸造应力，高温扩散退火时基体晶粒粗大及晶界上的显微孔洞等因素的综合作用，使黑锭在高温轧制时容易开裂。     

基于差分相关的星载AIS信号帧同步

在星载AIS接收机中,船舶信号在传输过程中产生的大范围时延和多普勒频移,给正确解码带来了困难。针对这一问题,基于AIS帧结构特点,提出一种差分相关帧同步算法。算法中将AIS帧结构中训练序列、开始标志和结束标志设计为间隔式特征序列作为同步码,通过差分相关函数来实现帧同步。仿真实验结果表明,该算法有较好的抗频偏特性,且在低信噪比下,性能要优于差分卷积法。