[Methods] 63 patients with 121 metastases 30~68 GY, 5~8 GY per times, 6~8 times per course, 2~3 times per week, 2~4week per course, planning target volume(PTV)1.8~130.0 cm3. Among 6~8 irradiation static confrmai fields are delivered.
Computed PDD curves for 10cm×10cm field, wedge field and lung inhomogeneity test cases agreed well with measured ones (maximum error<2%), but agreement of PDD curves for central block test case was not satisfactory.
Finite-energy high frequency signals, band-pass frequency signals, and band-stop frequency signals are characterized.
It gives the theoretical foundation about why Gunther generator can avoid the statistic weakness of the output sequence of stop-and-go generator, and analyzes the coincidence between output sequence and input sequences of Gunther generator.
The image is realized by modulating the voltage of under-gate, whose value is less than the cathode voltage, to stop the cathode producing field emission electrons.
Fourth, efficient measures should be taken to stop human activities that are harmful to Metasequoia and to improve the environment of ONMMT in order to promote the protection of the ONMMT population and its ecosystem.
By smoothness of dynamic loading is meant shockless interfacing of the process modes such as start, speedup, retardation, reversion, persistence, stop.
The stop block method in the multiple-specimen technique assures the criteria of the time-independent strain field around the crack tip and constant crack speed therewith and the J-integral is a valid toughness parameter.
A special experimental technique of a stop block method was developed.
The stop block method is employed in order to observe the crack paths and microcrack distribution ahead of a main crack tip under dynamic loading conditions at high temperature.