As end treatment of industrial pollution sources advances, their end emission space continuously shrinks. Industrial structural adjustment is an effective means in mitigating regional environmental pressure. This paper, based on status of three industrial structures in Sichuan, uses Theil index and industrial structure advancing index to estimate industrial structure rationalization extent and advancing level from perspectives of Sichuan province, five economic zones and cities, statistically analyzes the changing trend of leading industries, and applies component data model and ARIMA model to predict their percentages of three industries, aiming at offering references for Sichuan to make industrial structure optimization policies. It concludes that Sichuan's industrial structure has been consistently upgrading and improving, with large gaps within or among regions. Traditional energy, resources-intensive industries and primary processing industry of agricultural products still hold a major fraction, except Chengdu plain economic zone with developed electric information. This paper presents suggestions on enhancing co-integrated development within and among regions, boosting internal structural optimization of the secondary industry for Sichuan's industrial structural upgrading.

This paper, based on thin sections of coal-bearing formation of Ordos basin, studies the reservoir features and diagenesis of compact sandstone of coal-bearing formation of southern Ordos basin on cases of Memer 1 of Shanxi formation and Member 8 of Shihezi formation, Sulige area, and concludes that diagenesis largely influences reservoir. In the study area, the rock is mainly debris quartz sandstone with diagenesis of compaction, cementation and dissolution. It is concluded that the members has reached stage B of medium diagenesis combined with regional diagenesis evolution series. Comparison shows reservoir varies with diagenesis that compaction, cementation and dissolution destroy the pore structure in the early diagenesis, leading to a poor reservoir feature, and dissolution starts to produce secondary pores to improve the reservoir in the medium diagenesis.  

This paper gives a summary of distribution and features of China＇s seal stone resources. Most seal stone deposits are situated in the upper Jurassic volcanics in southeast coastal provinces Zhejiang, Fujian and Jiangxi. The minerals are mainly dickite, kaolin and prophyllite, a product of post thermal alteration with wall rocks as Mesozoic neutral-acid continental volcanics. This paper presents suggestions in planning, enhancing seal stone resources management, increasing resources use efficiency and boosting development and use.