The author thereby discusses the current status of library science research, forecasts its development trends, and brings forward a number of research proposals.
本文对目前图书馆学的研究现状进行了初步的探索，对其发展趋势进行了预测，并提出了一些研究建议。
The current status of research work, production technique and application on high chromium white cast iron are introduced and its research trend is also discussed.
介绍了高铬白口铸铁的研究、生产工艺和应用情况；并对高铬白口铸铁的研究方向提出了看法。
This paper introduces the precision and current research status of precise point positioning (PPP), analyses its advantage, and the feasibility of PPP used in Shipping Lane Survey was expected.
介绍了精密单点定位的精度和研究现状，分析了其优越性，展望了在航道测量方面的应用可行性。
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