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做强做优做大:新时代中国数字经济发展的重大成就与基本经验

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晋阳学刊 2024年第2期 53-64页

作者：易棉阳湖南工商大学经济与贸易学院长沙410205

中国数字经济发端于1994年中国接入国际互联网,起步晚但发展快。党的十八大以来,把发展数字经济上升为国家战略,在政策支持和市场主体努力下,中国数字经济取得了从跟跑到并跑到部分领域领跑的历史性成就,具体体现在数字经济创新能力持... 详细信息

中国数字经济发端于1994年中国接入国际互联网,起步晚但发展快。党的十八大以来,把发展数字经济上升为国家战略,在政策支持和市场主体努力下,中国数字经济取得了从跟跑到并跑到部分领域领跑的历史性成就,具体体现在数字经济创新能力持续增强、结构不断优化、体量稳步增长三个方面。不断做强做优做大的中国数字经济,为全面建成社会主义现代化强国、实现第二个百年奋斗目标奠定了坚实的物质技术基础。新时代十年数字经济发展积累了丰富的历史经验:处理好政府与市场的关系、筑牢数字经济技术底座、坚持走数实融合发展道路,这些经验对于加快发展数字经济、打造具有国际竞争力的数字产业集群具有十分重要的启迪意义。

关键词：新时代数字经济发展成就

INVOLUTIVE BASES UNDER COMPOSITION

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Journal of Systems Science & Complexity 2007年第3期20卷 397-402页

作者： Zailiang TANG Department of Mathematics and Information Science Mianyang Normal University Mianyang 621000 China.

In this paper, the behaviors of involutive bases under composition operation are studied. For two kinds of involutive bases, i.e., Pommaret bases, Janet bases, we study their behavior problems under composition. Some ... 详细信息

关键词： Involutive bases Janet bases polynomial composition Pommaret bases.

Minerogenic Model of Chrysotile Deposits in Ultramafic Rocks

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Acta Geologica Sinica(English Edition) 1990年第1期64卷 31-39页

作者： Wan Pu Sichuan Institute of Building Materials, mianyang City, Sichuan Liu Linqun Sichuan Institute of Building Materials Mianyang City Sichuan

Most chrysotile deposits occur in ultramafic rocks of the ophiolite suite. The chrysotile deposits dis-cussed in the present paper were formed through metasomatism and infilling-crystallization in a continentalserpentinization environment after plate convergence, where ultramafic rocks were replaced byhydrothermal solutions consisting mainly of deep-circulating heated water derived from atmospheric precip-itation. The critical state for the formation of asbestos in ultramafic rock bodies might be reached bysuperposition of multiple stages of serpentinization. Favourable fracture systems and relatively stable geo-logical environment are important conditions for forming chrysotile deposits. Three subtypes of chrysotiledeposits could be formed in different tectonic settings and under different minerogenic geochemical condi-tions.

关键词： Minerogenic Model of Chrysotile Deposits in Ultramafic Rocks

沉默PDCD4表达可减轻脓毒症血管内皮细胞损伤:基于改善线粒体动力学

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南方医科大学学报 2024年第1期44卷 25-35页

作者：于佳池李芮冰夏天王佳楠金家丞袁漫秋李绵洋解放军医学院北京100853 中国人民解放军总医院第一医学中心检验科北京100853 南开大学医学院天津300071

目的探究程序性细胞死亡因子4(PDCD4)在缓解脓毒症血管内皮细胞损伤中的作用机制。方法通过体外分别培养人脐静脉内皮细胞(HUVEC)和小鼠血管内皮细胞(C166)并给予脂多糖(LPS)处理,建立脓毒症血管内皮损伤细胞模型。分别设立对照组(NC)、... 详细信息

目的探究程序性细胞死亡因子4(PDCD4)在缓解脓毒症血管内皮细胞损伤中的作用机制。方法通过体外分别培养人脐静脉内皮细胞(HUVEC)和小鼠血管内皮细胞(C166)并给予脂多糖(LPS)处理,建立脓毒症血管内皮损伤细胞模型。分别设立对照组(NC)、LPS诱导组(NC+LPS)、si-PDCD4转染组(si-PDCD4)、si-PDCD4转染后LPS诱导组(si-PDCD4+LPS)、si-PDCD4转染后LPS诱导加线粒体分裂激动剂(FCCP)组(si-PDCD4+LPS+FCCP)。通过LC-MS/MS技术,分析PDCD4敲低前后蛋白组学变化。通过RT-PCR检测对照组和LPS组转染前后PDCD4、细胞炎症、凋亡以及线粒体分裂融合相关基因的mRNA表达量的变化;蛋白质印迹法检测线粒体分裂融合关键蛋白FIS1、DRP1和OPA1的表达水平;通过激光共聚焦技术观察JC-1、MitoSOX探针荧光强度以检测线粒体膜电位和线粒体活性氧变化。结果与对照组相比,LPS组炎症相关指标白介素-6(IL-6)、肿瘤坏死因子(TNF-α)和单核细胞趋化蛋白1(MCP1)基因的mRNA表达升高(P<0.05);PDCD4在脓毒症血管内皮细胞损伤中高表达(P<0.05);蛋白组学分析结果表明,PDCD4敲低与线粒体动力学存在相关性;Westernblot结果表明与对照组相比,LPS组诱导线粒体分裂蛋白FIS1、DRP1表达增加,融合蛋白OPA1减低(P<0.05);MitoSOX和JC-1荧光探针结果提示LPS诱导下内皮细胞线粒体发生氧化应激,膜电位显著降低(P<0.05),敲减组的氧化应激和线粒体膜电位有所缓解。PDCD4敲减后的保护效应可被线粒体分裂激动剂FCCP逆转。敲减PDCD4后能够抑制LPS所引起的炎症和氧化应激水平,线粒体分裂和融合指标恢复平衡。结论沉默PDCD4基因通过调控线粒体的动力学维持线粒体功能正常,减轻氧化应激,从而有利于缓解脓毒症血管内皮细胞损伤。

关键词：脓毒症血管内皮细胞线粒体动力学 PDCD4 炎症

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Production and Characterization of Spherical Porous Lignin Pellets

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稀有金属材料与工程 2011年第S3期40卷 188-192页

作者： Li Xianfa, Luo Xuegang Southwest University of Science and Technology, mianyang 621010, China SW Univ Sci & Technol Mianyang 621010 Peoples R China

With industrial kraft lignin as precursors, the transformer oil as dispersive phase, addin sodium dodecyl sulfate as dispersant and epichlorohydrin as crosslinking agent, the spheric porous lignin pellets were produced by two-phase solvent system. The suitable process conditions of producing the lignin pellets were determined by signal-factor and orthogonal experiments. The lignin pellets were characterized by scanning electron microscopy (SEM), fourier transform infrared spectroscopy (FT-IR), thermogravimetry and X-ray diffraction analysis. The results show that the ideal spherical lignin pellets with 87.75% of the yield could be obtained under the such conditions as 5 g lignin dissolved in 50 ml water by adjusting the solution pH value to 13, 0.6 g sodium dodecyl sulfate, 3 g epichlorohydrin and 150 ml transformer oil. Morphology studies show that lignin pellets have the full spheric shape and inner porous microstructure. Evidence for the reaction between lignin and epichlorohydrin has been observed using FT-IR and thermogravimetric analysis. The results of X-ray diffraction analysis demonstrate that crosslinked lignin pellets mainly are an amorphous polymer.

关键词： Kraft lignin two-phase solvent system spherical porous lignin pellets

Ab initio Calculation of Intermolecular Dispersion Energy and Induction Energy of Nitramide Dimer

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Chinese Journal of Chemistry 2004年第11期22卷 1377-1381页

作者：宋华杰肖鹤鸣董海山Institute of Chemical Materials China Academy of Engineering Physics mianyang Sichuan 62.900 China 黄奕刚Institute of Chemical Materials China Academy of Engineering Physics mianyang Sichuan 62.900 China 龙新平Institute of Chemical Materials China Academy of Engineering Physics mianyang Sichuan 62.900 China 汤业鹏Institute of Chemical Materials China Academy of Engineering Physics mianyang Sichuan 62.900 China Department of Chemistry Nanjing University of Science and Technology Nanjing Jiangsu 210094 China Institute of Chemical Materials China Academy of Engineering Physics Mianyang Sichuan 621900 China

The dispersion energies, induction energies and their exchange counterparts (exchange-dispersion and ex-change-induction energies) between two interacting nitramide molecules at several separations are derived based upon symmetry-adapted perturbation theory (SAPT). The results show that (1) the effect of intramonomer electron correlation on dispersion energies and induction energies for nitramide dimer system is remarkable especially in the region near the van der Waals minimum distance (0.42 nm). (2) At smaller separations the dispersion energies and the induction energies are largely quenched by their exchange counterparts, and this case in induction interaction is much more remarkable than in dispersion interaction. (3) Since at shorter distances there exists the strong short-range interaction due to electron transfer which quickly decays and even disappears at larger separations, the two different R-dependency formulae of induction energies were found: one is ca. R-12.7 at short distances, and the other ca. R-7.0 at large separations. The latter R-dependency is similar to that (ca. R-7.2) of dispersion. (4) In the case of strong polar interaction existing in nitramide dimer, the true induction correlation terms of higher order than t(22)indE may be important.

关键词： dispersion energy induction energy nitramide dimer symmetry-adapted perturbation theory

The Influence of Temperature on the Afterglow Feature of SrAl_2O_4∶Eu,Dy Phosphors

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Journal of Wuhan University of Technology(Materials Science) 2006年第3期21卷 120-122页

作者：王兵 Materials School Southwest University of Science and TechnologyMianyang 621010China

Using a self-designed temperature testing box in which Xenon-lamp irradiation can be applied, the afterglow feature of SrAl2O4： Eu, Dy as a function of temperature has been researched. Two sorts of SrAl2O4 ： Eu, Dy phosphors, namely highest quality commercial one and the self-synthesized one by solid-state reaction process were employed. Results reveal a common phenomenon behaving as phosphorescent sudden extinguishments at a certain low temperature although their threshold temperature value （ about 223 K） has a slight difference . The general charueteristic for the influence of temperature on the afterglow feature presents, compared to the luminescent decay at room temperature （RT）, a bigger and faster decrease of phosphorescent brightness with the reduction of temperature, while decay curves still maitain the same pattern composed of a quick decline part and a platform falling part during which the phosphorescent brightness at 273 K is only aboat 1/2 as big as that at RT, and at 253 K the figure has changed to about 1/3. Finally , the reason of previous observed results has been analyzed briefly in theory.

关键词： afterglow SrAl2O4:Eu,Dy low temperature

Numerical Simulation of Shock (Blast) Wave Interaction with Bodies

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Communications in Nonlinear Science and Numerical Simulation 1999年第1期4卷 1-7页

作者： Jialing LE (China Aerodynamics Research and Development Center P.O. Box 211 mianyang Sichuan China) China Aerodynamics Research and Development Center P.O. Box 211 mianyang Sichuan China China

Some typical results of computation on the shock (blast) wave interaction (2-D and 3-D) with bodies and its experimental validation in shock tube are summarized, suggestions for improving the numerical method (difference scheme and grid systems),developing 3-D optical quantitative visualization technology and further studying the unsteady turbulent flow are put forward.

关键词： shock wave blast wave numerical simulation

Quantum properties of the binomial state field interacting with a two-level atom

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Science China(Physics,Mechanics & Astronomy) 2010年第5期53卷 864-869页

作者： JIANG DaoLai,REN XueZao,CONG HongLu & LI Lei School of Science,Southwest University of Science and Technology,mianyang 621010,China 1. School of Science Southwest University of Science and Technology Mianyang 621010 China

By the method of coherent-state orthogonalization expansion,the atomic inversion and the anti-bunching effect in a two-level atomic system interacting with binomial state field are studied under the Jaynes-Cummings model without rotating wave *** influence of the parameter and the detuning on the anti-bunching effect are discussed,and the anti-bunching effect is also discussed under the conditions of strong *** studies show that the second order coherence degrees are quite different between the situations of with and without-rotating wave *** the latter when the detuning increases,the duration of the bunching effect increases at the beginning and then decreases,and finally the light field displays anti-bunching effect completely.

关键词： coherent state orthogonalization expansion binomial state field Jaynes-Cummings model without-rotating wave approximation atomic inversion