On the basis of references of foreign anddomestic experience and research achievements, we should take measures of reasonably choosing line location, scientifically decidingthe plan of construction site, and reliably disposing foundation for railway projects in collapsible loess area, so as to supply technicalsupport for the construction of passenger dedicated line.

By introducing Internet、E-mail basic concepts,FTP、GOPHER、WWW inquiry software on line,location and obtainment method of economic and financial materials,this paper states that a common people use easily Internet to obtain international economic and financial materisals.

The General Information of permanent way and construction for Xi' an-Ankang railway and the new technique and technology adopted in the aspects of line location, survey and design and tunnel construction are introduced with the emphasis laid on the introduction of features and technical progresses for the Qinling Tunnel project.

In order to monitor two dimensional location of AE hypocentres and to record the output of the meter, we refitted the 4010 AE meter which has only the ability of location along a line. We added a synchronoue timer which controls two line-location units, and replaced the original single transducer with multitransducers, and put sound-conductive plates between the sample and the multitransducers, which reduce the error of AE location. The precision of the requipped d4010 meter...

In order to monitor two dimensional location of AE hypocentres and to record the output of the meter, we refitted the 4010 AE meter which has only the ability of location along a line. We added a synchronoue timer which controls two line-location units, and replaced the original single transducer with multitransducers, and put sound-conductive plates between the sample and the multitransducers, which reduce the error of AE location. The precision of the requipped d4010 meter is about 1.5% of sample size. A Z-80 computer controls the refitted 4010 and a typewriter. Records of two-axial location of same AE event with AE rate or AE number or AE energy can be obtained at the same time.The AE rate, strain of sample and locations of AE sources can be recorded using the refitted 4010 when a thin plate sample is compressed upto its failure. The results show: (1) A distinct gap of AE location is observed before failure of the sample; (2) areas of AE hy-pocenter concentration are all cut through by long and big macrocracks; and (3) the space patterns of AE sources are different through stages of loading on the sample.

A K-line location algorithm for buillding block cells in LSI/VLSI is presented. When the relative positions of rectangular cells are given, there are 2n states according to thetwo orientations of a cell. It is proved that to find the optimum solution from 2n states canbe reduced to calculate the n states in k-line algorithm. So the algorithm is very effectiveand can be used with association for cluster method in BBL placement. Under certain conditions, this method can also be used to pesudo BBL placement...

A K-line location algorithm for buillding block cells in LSI/VLSI is presented. When the relative positions of rectangular cells are given, there are 2n states according to thetwo orientations of a cell. It is proved that to find the optimum solution from 2n states canbe reduced to calculate the n states in k-line algorithm. So the algorithm is very effectiveand can be used with association for cluster method in BBL placement. Under certain conditions, this method can also be used to pesudo BBL placement directly.

In this paper, a single line location algorithm for building block cells in LSI/VLSI is presented. When the relative positions of rectangular cells are given, there are 2N states according to the two orientations of a cell. It is proved that to find the optimum solution from the 2N states can be reduced to calculate the N states in single line algorithm.So the algorithm is shown very effectively and can be used with association for cluster method in BBL placement. The program has been written in...

In this paper, a single line location algorithm for building block cells in LSI/VLSI is presented. When the relative positions of rectangular cells are given, there are 2N states according to the two orientations of a cell. It is proved that to find the optimum solution from the 2N states can be reduced to calculate the N states in single line algorithm.So the algorithm is shown very effectively and can be used with association for cluster method in BBL placement. The program has been written in Fortran language and realized on an IBM-PC computer.