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71.
The discharge behaviour of electrodeposited lead dioxide and lead electrodes was investigated under various conditions; the surfaces of the discharged electrodes were observed with a scanning electron microscope. Both the positive and negative electrodes were passivated by a covering of deposited lead sulphate crystals. The amount of lead sulphate required for passivation depended on the size of the crystals. 相似文献
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Kenjiro Meguro Tetsuya Kanbe Kunio Esumi 《Journal of the American Oil Chemists' Society》1983,60(5):1050-1052
The surface tensions of a mixed system of sodium tetradecyl sulfate (STS) and a series of polyoxyethyleneglycol-n-dodecyl ethers (nED) were measured at temperatures of 30 and 40 C, respectively. When the STS concentration was fixed, the
surface tension curves of the mixed system showed a flat portion in the range of which the mixed micelles would be formed.
With a decrease of the added STS concentration, the length of the flat portion in these curves decreased gradually, and finally
disappeared in the presence of 0.05 mM STS. Furthermore, when the concentration of STS was fixed at 1.0 mM, which is below
the critical micelle concentration (CMC), the flat portion length in the surface tension curves de-creased with decreasing
ethylene oxide chain length in nED and with increasing temperature. The influence of increment of temper-ature was comparable
to that for reducing the length of ethylene oxide chain in nED. 相似文献
77.
Shigeki Shibayama Takeo Kakuta Nobuyoshi Miyazaki Haruo Yokota Kunio Murakami 《New Generation Computing》1984,2(2):131-155
This paper describes the basic concepts, design and implementation decisions, standpoints and significance of the database machine Delta in the scope of Japan’s Fifth Generation Computer Project. Delta is planned to be operational in 1985 for researchers’ use as a backend database machine for logic programming software development. Delta is basically a relational database machine system. It combines hardware facilities for efficient relational database operations, which are typically represented by relational algebra, and software which deals with hardware control and actual database management requirements. Notable features include attribute-based internal schema in accordance with the characteristics found in the relation access from logic programming environment. This is also useful for the hardware relational algebra manipulation algorithm based on merge-sorting of attributes by hardware and a large capacity Semiconductor Disk for fast access to databases. Various implementation decisions of database management requirements are made in this novel system configuration, which will be meaningful to give an example for constructing a hardware and software combination of a relational database machine. Delta is in the stage between detailed design and implementation. 相似文献
78.
Failure strength for circumferentially and axially cracked Type 304 stainless steel pipes is evaluated based on the net-stress approach. Using this approach, allowable flaw sizes for pipes containing circumferential or axial cracks are considered from the leakage and breakage viewpoint. 相似文献
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