Considering current level of technology development, within the framework of international convention of intellectual property rights, as to the patent application in the field of new technology, China should make strict standards for various patent substantive conditions, prevent the threshold of patent protection from being lowered, and actively participate in the formulation of relevant international convention to maintain and develop the interests of China.
Restricted by technical development level,the data of previous gas logging was interpreted in qualitative method,as its application and the value are limited,so it is necessary to find out the gas logging′s quantitative interpretation method.
The paper analyzed the variation tendency of the mine safety production status. With the numerical and physical statistic analysis method,a relationship model between the fatal figure of mine,the fatal rate per million t of coal and the economic and technical development level of the coal industry. The relationship model released the inherent law and provided the measures and proposals to improve the mine safety production.
Technology developmental level of safety valve and the other safety accessories is key factor to condition whole technology developmental level of liquefied gas tanker.
In this paper, we present a survey on the state of the art knowledge on this topic, which is incomplete, and indicate some new trends for further research.