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An accurately delineated Permian-Triassic Boundary in continental successions

Science china Earth Sciences 2007年第9期50卷 1281-1292页

作者： YIN HongFu1, YANG FengQing2, YU jianxin2, PENG YuanQiao1, WANG ShangYan3 & ZHANG SuXin1 1 Laboratory of Biological and Environmental Geology, china university of Geosciences, Wuhan 430074, china 2 State Key Laboratory of Geological Process and Mineral Resources, china university of Geosciences, Wuhan 430074, china 3 Geological Survey of guizhou Province, guiyang 550011, china Laboratory of Biological and Environmental Geology China University of Geosciences Wuhan China State Key Laboratory of Geological Process and Mineral Resources China University of Geosciences Wuhan China Geological Survey of guizhou Province Guiyang China

The Permian-Triassic Boundary Stratigraphic Set (PTBST), characteristic of the GSSP section of Meishan and widespread in marine Permian-Triassic Boundary (PTB) sequences of South china, is used to trace and recognize the PTB in a continental sequence at Chahe (Beds 66f―68c). Diversified Permian plant fossils extended to the PTBST, and a few relicts survived above that level. Sporomorphs are dominated by fern spores of Permian nature below the PTBST, above which they are replaced by gymnosperm pollen of Triassic aspect. In the nearby Zhejue Section, the continental PTBST is charac- terized by the fungal 'spike' recorded in many places throughout the world. The boundary claybeds (66f and 68a,c) of the PTBST are composed of mixed illite-montmorillonite layers analogous with those at Meishan. They contain volcanogenic minerals such as β quartz and zircon. U/Pb dating of the upper claybed gives ages of 247.5 and 252.6 Ma for Beds 68a and 68c respectively, averaging 250 Ma. In con- trast to the situation in Xinjiang and South Africa, the sediment sequence of the Permian-Triassic tran- sition in the Chahe section (Beds 56―80) become finer upward. Shallowing and coarsening upward is not, therefore, characteristic of the Permian-Triassic transition everywhere. The occurrence of relicts of the Gigantopteris Flora in the Kayitou Fm. indicates that, unlike most marine biota, relicts of this pa- leophytic flora survived into the earliest Triassic. It is concluded that Bed 67 at Chahe corresponds to Bed 27 at Meishan, and that the PTB should be put within the 60-cm-thick Bed 67b④, now put at its base tentatively. This is the most accurate correlation of the PTB in continental facies with that in the marine GSSP.

关键词： Permian-Triassic Boundary, terrestrial sequence, U-Pb age, Chahe section, accuracy

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Studies on the phase properties of lyotropic liquid crystals of Brij35/sodium oleate/oleic acid/water system: By means of polarizing microscope, SAXS, 2H-NMR and rheological methods

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Science china Chemistry 2006年第5期49卷 411-422页

作者： AN Ya1,2,XU Jun1,ZHANG Jin1,HU Changgang1,2,li Ganzuo1,WANG Zhining1,WANG Zhongni1,ZHANG Xiaoyi2 & ZHENG liqiang1 1. Key Lab of Colloid and Interface Chemistry for State Education Ministry,Jinan 250100,china 2. College of Science,guizhou Normal university,guiyang 550001,china Key Lab of Colloid and Interface Chemistry for State Education Ministry Jinan China College of Science Guizhou Normal University Guiyang China

The pseudo-quaternary phase diagram of Brij35/sodium oleate/oleic acid/watersystems has been investigated, and the liquid crystal area has been identified, which covers abouttwo thirds of the whole phase diagram. The liquid crystal structure and behavior have been alsostudied by using polarizing texture, small angle X-ray scattering, ~2H-NMR and rheometer etc. Theresult shows that when the composition of the system changes along the line of AA′ in this largeliquid crystal region, the structural change iscubic→cubic/lamellar→lamellar→larnellar/hexagonal→hexagonal. Meanwhile, we made the firstattempt of systematic study of the rheological properties of the above system. The lattice constantsof cubic and hexagonal liquid crystals are 10.53 and 5.68 nm, respectively.

关键词： Brij35, lyotropic liquid crystals, 2H-NMR, polarizing textures, small angle X-ray scattering, rheological properties.

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The Measuring and Impacting Factors Analysis of Rural Straw Yield-Based on the Perspective of Constructing Low-carbon Agricultural Economy

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Asian Agricultural Research 2011年第2期3卷 53-57页

作者： YANG li-sha College of Management,guizhou university,guiyang 550025,china

On the basis of expounding the status quo and using developmental trend of china's straw,4 indices are selected:straw yield,planting area,using amount of fertilizer and effective irrigation *** to the relevant data of china Statistical Yearbook from 1991 to 2008,by using linear regression model,we calculate china's rural straw yield,analyze the factors impacting straw yield,and point out that the using amount of fertilizer is the important factor impacting straw *** on these,in the perspective of low-carbon agricultural economy,we put forward suggestions of using straw comprehensively from 4 perspectives in order to provide theoretical reference for decision-makers:improve fertilizer dependence;develop straw reuse technology;popularize the technology of straw gasification actively;strengthen farmers' low-carbon awareness.

关键词： Village Straw Low-carbon agriculture Measuring Chi

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Deciphering the molecular mechanisms of Simiaowan in the treatment of hyperuricemia: in vivo and in silico approaches

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Traditional Medicine Research 2025年第2期10卷 37-54页

作者： Yong-Chang Zeng Jun-Hong Wu Dan-Dan Xu Kang He Chang-Qing liu li-fei Song Zheng-Zhi Wu Qian-Qian Jiang Shao-Yu liang Department of Neurology The First Affiliated Hospital of Shenzhen UniversityShenzhen 518020China Pharmaceutical Department The Affiliated TCM Hospital of Guangzhou Medical UniversityGuangzhou 510000China School of Pharmacy Guizhou University of Traditional Chinese MedicineGuiyang 550025China Guangzhou Zeli Medical Technology Co. Ltd.Guangzhou 510700China

Background:Simiaowan(SMW),a well-known traditional Chinese medicine,has been employed to treat hyperuricemia(HUA)and gout for ***,the bioactive components and underlying mechanisms have not been *** objective of this study was to identify the active components and potential mechanisms of SMW by integrating pharmacological experimentation,serum pharmacochemistry,network pharmacology and molecular ***:HUA rats modelling by high-fat/high-sugar diet and potassium oxonate/adenine oral administration were used to evaluate the pharmacodynamic effects of ***-Q-Exactive-MS/MS was employed to detect the bioactive components present in SMW-containing *** pharmacology and molecular docking were utilized to elucidate the potential targets and underlying ***:SMW effectively ameliorated HUA rats via the inhibition of uric acid(UA)production,promotion of UA excretion,improvement of lipid and glucose metabolic abnormalities,antioxidant,anti-inflammatory and anti-insulin resistance effects.A total of 73 compounds detected in SMW-containing serum were identified as potential active components,with alkaloids,flavonoids,organic acids,and terpenoids emerging as the primary active *** 203 corresponding targets were obtained as SMW anti-HUA/gout targets,which mainly participated in apoptosis,insulin resistance,TNF,PI3K-Akt,HIF-1,NF-κB,MAPK,IL-17 and TLR signaling *** docking indicated that active compounds(***,phellodendrine,quercetin,formononetin,ferulic acid)had superior binding abilities to the key targets(*** carrier family 22 member 12(URAT1),solute carrier family 22 member 6(OAT1),ATP-binding cassette sub-family G member 2(ABCG2),solute carrier family 2,facilitated glucose transporter member 9(GLUT9),xanthine dehydrogenase/oxidase(XDH),transcription factor p65(RELA),toll-like receptor 4(TLR4),prostaglandin G/H synthase 2(PTGS2),caspase-3(CASP3),insulin(INS)).Conclusion:S

关键词： hyperuricemia network pharmacology serum pharmacochemistry Simiaowan UPLC-Q-Exactive-MS/MS

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Effect of Parameters on Synthesis of Silica Aerogels

Effect of Parameters on Synthesis of Silica Aerogels

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中国颗粒学会第六届学术年会暨海峡两岸颗粒技术研讨会

作者： Hui Wang~1,jianxin cao~2,lingke Zeng~1 (1.College of Materials Science & Engineering,South china university of Technology,Guangzhou,Guangdong 510640,china 2.College of Chemical Engineering,guizhou university,guiyang,guizhou 550003,china)

Silica aerogels were synthesized by the sol-gel polymerization of tetraethylorthosilicate(TEOS) followed by supercritical drying(SD) at 300℃and *** influences of water/TEOS,ethanol/TEOS,activator dosage and pH value on the gelation time and the pore structure of SiO aerogel during the process were *** results show that the gelatinizing time became longer at higher water/ethanol content,at first it was decreased with pH value and HF content increased and then it was *** porous structure was measured by nitrogen adsorption *** content of HO had a dominant effect on the pore size distributions and the pore *** pore diameter become greater and the pore size distribution appeared widen when pH value *** with the content of HF increasing the pore diameter become smaller and the pore size distribution narrow at first,and then the pore diameter become greater and the pore size distribution widened.

关键词： Silica aerogels synthesis parameters porous structure

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论刑事二审的证据调查

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法学论坛 2011年第4期26卷 148-153页

作者：李长城西南政法大学法学院重庆400031

刑事二审的不同构造决定着证据调查的不同特点。我国刑事二审在构造上以事后审为主,兼具续审的性质。刑事二审的证据调查具有书面性,主要方式是印证,强烈的职权性特征使被告方的证据相关权利缺乏保障。应当强化我国刑事二审的开庭审理... 详细信息

刑事二审的不同构造决定着证据调查的不同特点。我国刑事二审在构造上以事后审为主,兼具续审的性质。刑事二审的证据调查具有书面性,主要方式是印证,强烈的职权性特征使被告方的证据相关权利缺乏保障。应当强化我国刑事二审的开庭审理的类型,设置最低限度的证人出庭规则,确立证据调查的"三方作业"模式,规范刑事二审的证据调查程序。

关键词：刑事二审构造证据调查印证出庭

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Analogues of Hadwiger's Theorem in Space IR^n—Sufficient Conditions for a Convex Domain to Enclose Another

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Acta Mathematica Sinica,English Series 1995年第1期11卷 12-22页

作者： Zhou Jiazu Department of Mathematics,guizhou Normal university,guiyang,550001 china li Haizhong Department of Mathematics,Zhengzhou university,Zhengzhou,450052 china Chen Xingyue Department of Mathematics,Chongqing Teacher’s College,Yongchuan,632168 china 贵州师范大学数学系贵州贵阳郑州大学数学系河南郑州重庆师范高等专科学校数学系重庆

We estimate the kinematic measure of one convex domain moving to another under the group G of rigid motions in IR~*** first estimate the kinematic formula for the total scalar curvature ∫Rdv of the n-2 dimensional intersection submanifold D∩g *** we use Chern and Yen’s kinematic fundamental formula and our integral inequality to obtain a sufficient condition for one convex domain to contain another in IR~n(≥4).For n=4,we directly obtain another sufficient condition in IR~4.

关键词： Analogues of Hadwiger’s Theorem in Space IR~n Sufficient Conditions for a Convex Domain to Enclose Another IR

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虚拟样机中有限元法

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系统仿真学报 2003年第4期15卷 508-511,515页

作者：谢庆生李少波楚甲良贵州工业大学CAD/CIMS工程技术中心贵阳550003

研究基于虚拟样机的产品设计方法及其应用,重点研究了基于虚拟样机的并行产品设计方法、基于有限元法的产品优化设计、基于随机有限元的可靠性设计等。结合典型产品汽车车身的设计,研究了汽车车身并行虚拟样机设计方法,为机械类新产品... 详细信息

研究基于虚拟样机的产品设计方法及其应用,重点研究了基于虚拟样机的并行产品设计方法、基于有限元法的产品优化设计、基于随机有限元的可靠性设计等。结合典型产品汽车车身的设计,研究了汽车车身并行虚拟样机设计方法,为机械类新产品的开发提供了可借鉴的有效方法与途径。

关键词：汽车车身虚拟样机设计方法有限元法并行工程

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Convergence for Imaginary Time Step evolution in the Fermi and Dirac seas

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Science china(Physics,Mechanics & Astronomy) 2010年第2期53卷 327-330页

作者： li FangQiong1,ZHANG Ying2 & MENG Jie2,3,4 1guizhou university for Nationalities,guiyang 550025,china 2State Key Lab Nucl. Phys. & Tech.,School of Physics,Peking university,Beijing 100871,china 3School of Physics and Nuclear Energy Engineering,Beihang university,Beijing 100191,china 4Department of Physics,university of Stellenbosch,Stellenbosch,South Africa guizhou university for Nationalities Guiyang China State Key Lab Nucl. Phys. & Tech. School of Physics Peking University Beijing China School of Physics and Nuclear Energy Engineering Beihang University Beijing China Department of Physics University of Stellenbosch Stellenbosch South Africa

The convergence for the Imaginary Time Step (ITS) evolution with time step is investigated by performing the ITS evolution for the Schrdinger-like equation and the charge-conjugate Schrdinger-like equation deduced from Dirac equation for the single proton levels of 12C in both the Fermi and Dirac seas. For the guaranteed convergence of the ITS evolution to the "exact" results,the time step should be smaller than a "critical" time step Δtc for a given single-particle level. The "critical" time step Δtc is more sensitive to the quantum numbers |κ| than to the energy of the single-particle level. For the single-particle levels with the same κ,their "critical" time steps are in the same order. For the single-particle levels with similar energy,a relatively small (large) "critical" time step for larger (smaller) |κ| is needed. These conclusions can be used in the future self-consistent calculation to optimize the evolution procedure.

关键词： Dirac equation Schrdinger-like equation Imaginary Time Step method convergence

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Deep decalcification of factory-provided freezing acidolysis solution to achieveα-high-strength gypsum

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Chinese Journal of Chemical Engineering 2024年第5期69卷 143-151页

作者： Wencai Ye Yulu li Yonggang Dong lin Yang Yun Yi jianxin cao School of Chemistry and Chemical Engineering Guizhou UniversityGuiyang 550025China Engineering Research Center of Efficient Utilization for Industrial Waste Guizhou UniversityGuiyang 550025China Key Laboratory of guizhou Province for Green Chemical Industry and Clean Energy Technology Guizhou UniversityGuiyang 550025China

The freezing acidolysis solution of the nitric acid-phosphate fertilizer process has a high calcium content,which makes it difficult to produce fine phosphate and high water-soluble phosphate fertilizer ***,based on the potential crystallization principle of calcium sulfate in NH_(4)NO_(3)-H_(3)PO_(4)-H_(2)O,the deep decalcification(*** removal)technology to achieveα-high-strength gypsum originated from freezing acidolysis-solutions has been firstly proposed and ***,calcium can be removed from the factory-provided freezing acidolysis-solution by neutralizing it with ammonia,followed by the addition of ammonium sulfate *** a result,the formation of calcium sulfate in the reaction system undergoes the nucleation and growth of CaSO_(4)·2H_(2)O(DH),as well as its dissolution and crystallization into short columnarα-CaSO_(4)·0.5H_(2)O(α-HH).Remarkably,with the molar ratio of SO_(4)^(2-)/Ca^(2+)at 1.8,the degree of neutralization(NH_(3)/HNO_(3) molar ratio)at 1.7,the reaction temperature of 94℃,and the reaction time of 300 min,the decalcification rate can reach 86.89%,of which the high-strengthα-CaSO_(4)·0.5H_(2)O(α-HH)will be ***,the deep decalcification product meets the standards for the production of fine phosphates and highly water-soluble phosphate ***,the 2 h flexural strength ofα-HH is 5.3 MPa and the dry compressive strength is 36.8 MPa,which is up to the standard of commercialα-HH.

关键词： Nitrophosphate Ammonia neutralization Deep decalcification High-strengthα-hemihydrate gypsum Controlled crystallization at atmospheric pressure

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