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In the era of the digitaleconomic, computing power has become an important indicator to measure the degree of national economic development. With analyzing the two national strategies of "Channel Computing Resources from the East to the West" progect and "Construction of Chengdu-Chongqing Economic Circle", and based on the construction of Chengdu-Chongqing Hub Node, the reasons that why Chengdu-Chongqing hub node has been laid out as one of the eastern hub nodes were analyzed. It due to four aspects, namely, strategic location advantage of computing, data integration system guarantee, computing infrastructure compaction, and maturity of computing application scenarios. Further, the operations in the advanced data center of Western (Chongqing) Science City demonstrate that the nationalcomputing hub built in Chengdu-Chongqing economic circle boosts the project that channels computing resources from the east to the west. Then the paper discussed the coordinated development between Tianfu data center cluster and Chongqing data center cluster, as well as the coordinated development between national computing hub built in Chengdu-Chongqing economic circle and national computing hub built in Guizhou province. It suggested that Tianfu data center cluster and Chongqing data center cluster should build coordination mechanisms from six aspects, including the network, data, computing power, industry, algorithm and energy. The neighboring national computing hubs can implement coordination based on the allocation of computing power business, the cross-domain circulation of data elements, and new business formats for digital cooperation. [ABSTRACT FROM AUTHOR]

Pteris insignis, which has the medical function of clearing heat and draining dampness as well as activating blood to subside swelling, is widely distributed and rich in resources in Guizhou. As far as we know, there is no literature report on the study of its chemical constituents and biological activity. The purpose of this paper was to explore the material basis of this species, to reveal the related bioactive constituents and lead compounds. The aerial part of P. insignis was extracted with 95% methanol to give crude extract, which was then isolated and purified by silica gel, MCI gel CHP 20P, YMC gel ODS-A-HG and Sephadex LH-20 column chromatography. The structures of obtained compounds were deduced by the analysis of comprehensive spectral data. Eighteen compounds were isolated and identified as ( -) -a-tocospirone (1), cyclolaudenol ( 2), ( 25, 35) -pterosin C ( 3), ( 2R, 35)-pterosin C ( 4), pterosin ll (5), plerosin F (6), a-ionone A(7), saurnpunol C/D (8/8'), ficusol (9), palmilic acid ( 10), 2-dodec-2-envlsuccinic acid dimdhyl esler (11), nwlhyl-9-phen1'l-lO-hydmxy(1cladecanoale (12), hexadecarn1ic acid-2,3-dihydmxypmpy 1 esler ( 13), mdhyl daidale ( 14), ( Z, Z)-9, 12-octadecadienoic acid mdhyl esler ( 15), ( Z, Z, Z) -9, 12, 15- ocladecalrienoic acid esler ( 16), carnlenoid ( 17), /J-siloslernl ( 18) . All Lhe compounds were isolated fmm P. imignis for Lhe firsl Lime. The results of Lhis sludy will lay a scientific foumlalion for Lhe rational use of ils r'f'.sources. [ABSTRACT FROM AUTHOR]

Longtan shale is widely developed in Guizhou Province and is an important part of the unconventional natural gas for the development in coal-bearing formations. Some mudstones have special characteristics due to some siderite minerals contained. This paper takes the Upper Permian Longtan shale in the northern Guizhou as an example to examine the coal-bearing mudstone reservoir. Based on the canister desorption, well logs and test results of siderite-bearing mudstones( core samples from LC-1 well), the authors present systematic pore structure, inorganic and Rock-Eval analyses of the mudstones to examine their gas content, reservoir properties, depositional environ-ment and origin. The results show that the Longtan shale contains type Ⅲ gas-prone organic matter with an over-mature stage and has total organic carbon values ranging between 0. 90% and 2. 71%. Carbon isotope data clearly indicate the terrestrial organic matter source dominating the Upper Longtan formation. Desorbed gas content( obtained by canister desorption, dominated by methane) of core samples ranges from 0. 08 to 7. 79 m3/t with an average of 1. 60 m3/t. The mudstones are mainly composed of clays( 35%) and quartz( 15. 7%), and most of them contained high siderite and dolomite with an average of 38. 1% and 9. 5%, respectively. Desorbed gas content of core samples are positively correlated with TOC but negatively correlated with quartz and clay mineral contents, BET specific surface areas and BJH total pore volumes measured by gas injection method, which suggests that the organic matter is the main material source for desorbed gas, but the storage space is not provided by mesopores or micropores. However, the negative correlation between siderite content and specific area with pore volume( obtained by gas injection method), suggesting that the intercrystalline pore of siderite is insufficient to provide the storage space for the occurrence of the desorbed gas. The distribution of siderite around the organic matter is stratified, botryoidal, lenticular or tuberculous, and the stratigraphic continuity remains intact. The siderite surrounding the organic matter, as analogous to a "micro-trap"inside the mudstone, blocks the hydrocarbon gas migration in the organic matter. This may be the main reason for the positive correlation between desorption and siderite content. The organic matter always adsorbed and stored the hydrocarbon gas generated and sealed by"micro-trap". With the increase of organic matter and"micro-trap", the amount of enclosed gas increases. The sideritebearing mudstone with filled gas may further reach as an overpressure reservoir for a certain pressure gas sealing. Furthermore, the siderite-bearing mudstone can have independent "micro-gas system"for the lacking of gas migration and exchange with adjacent coal seams. The reducing conditions during the deposition of Longtan formation for the response of elemental geochemical index is closely interrelated to the fluctuation of sea level, indicating that the typical sedimentary environment provides favorable conditions for the siderite. The desorbed gas, siderite and organic carbon content change regularly with the process of sea level falling and rising from bottom to top of the Upper Permian, indicating that the siderite and organic matter deposited in tidal flat-lagoon with relatively stable Eh and p H values and limited water circulation. The high ferric ions brought into by sand interstitial water chemically react with reducing gas from the reduction of organic matter to create hydrocarbon gas. The gas sealed by "micro-trap"is stored as adsorbed gas on organic matter, suggesting a controlling effect on the desorbed gas of siderite-bearing mudstone. [ABSTRACT FROM AUTHOR]

Western Guizhou has the most abundant coalbed methane resources in South China. In order to efficiently exploit the coalbed methane in this area, it is important to understand the drainage decompression and orderly development methods of coal seam groups under the control of Unattached multiple superposed CBM-bearing system. This paper took Feitian Block of Zhina coal field in Western Guizhou as the researching area, analyzing the meticulous hydrogeological condition of coal-bearing strata and the difference of development condition of different coal seam groups in vertical. Based on pumping test data from previous coal exploration, useful information was generated, including the apparent reservoir pressure, pressure gradient, unit water inflow, permeability coefficient and radius of influence. The difference of hydrogeological condition in different parts of coal-bearing strata in three-dimensional space was compared. Eventually, the factor of evaluating CBM development priority was established through fuzzy mathematics synthetical judgement. Accordingly, the developing potential and development order of different coal seam groups in vertical of the three coal mine areas was discussed. It is concluded that the Feitian 2 and Feitian 3 mine areas have a better CBM development condition than Feitian 1,among which Feitian 2 medium part, Feitian 3 upper part and medium part are prior for CBM development. Generally, The development order of each part of coal-bearing strata of each coal mine area is : Feitian 3 upper part → Feitian 2 medium part →Feitian 3 medium part →Feitian 3 lower part →Feitian 2 lower part →Feitian 2 upper part →Feitian 1 upper part /Feitian 1 medium part →Feitian 1 lower part. [ABSTRACT FROM AUTHOR]