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Analysis of bacterial community structures in two sewage treatment plants with different sludge properties and treatment performance by nested PCR-DGGE method

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Journal of Environmental Sciences 2007年第1期19卷 60-66页

作者： LIU Xin-chun ZHANG yu yang Min WANG Zhen-yu LV Wen-zhou State Key Laboratory of Environmental Aquatic Chemistry Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beifing 100085 China

The bacterial community structures in two sewage treatment plants with different processes and performance were investigated by denaturing gradient gel electrophoresis （DGGE） of nested polymerase chain reaction （nested PCR） amplified 16S rRNA gene fragments with group-specific primers. Samples of raw sewage and treated effluents were amplified using the whole-cell PCR method, and the activated sludge samples were amplified using the extracted genomic DNA before the PCR products were loaded on the same DGGE gel for bacterial community analysis. Ammonia-oxidizing bacterial and actinomycetic community analysis were also carried out to investigate the relationship between specific population structures and system or sludge performance. The two plants demonstrated a similarity in bacterial community structures of raw sewage and activated sludge, but they had different effluent populations. Many dominant bacterial populations of raw sewage did not appear in the activated sludge samples, suggesting that the dominant bacterial populations in raw sewage might not play an important role during wastewater treatment. Although the two plants had different sludge properties in terms of settleability and foam forming ability, they demonstrated similar actinomycetic community structures. For activated sludge with bad settling performance, the treated water presented a similar DGGE pattern with that of activated sludge, indicating the nonselective washout of bacteria from the system. The plant with better ammonium removal efficiency showed higher ammonia-oxidizing bacteria species richness. Analysis of sequencing results showed that the major populations in raw sewage were uncultured bacterium, while in activated sludge the predominant populations were beta proteobacteria.

关键词： activated sludge wastewater treatment sewage community analysis PCR-DGGE

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Molecular Dynamics Simulation Studies on the Micromorphology and Proton Transport of Nafion/Ti_(3)C_(2)T_(x) Composite Membrane

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Chinese Journal of Polymer Science 2024年第3期42卷 373-387,I0009页

作者： Zhi-yue Han Su-Peng Pei chun-yang yu Yong-Feng Zhou School of Chemical and Environmental Engineering Shanghai Institute of TechnologyShanghai 201418China School of Chemistry&Chemical Engineering Frontiers Science Center for Transformative MoleculesShanghai Key Laboratory of Electrical Insulation and Thermal AgingShanghai Jiao Tong UniversityShanghai 200240China Key Laboratory of Green and High-end Utilization of Salt Lake Resources Chinese Academy of SciencesXining 810008China

The perfluorosulfonic acid(PFSA) membrane doped with two-dimensional conductive filler Ti_(3)C_(2)T_(x) is a fuel cell proton exchange membrane with high application potential. Experimental studies showed that the proton conductivity of Nafion/Ti_(3)C_(2)T_(x) composite membrane is improved significantly compared with that in pure Nafion. However, the microscopic mechanism of doping on the enhancement of membrane performance is remain unclear now. In this work, molecular dynamics simulation was used to investigate the microscopic morphology and proton transport behaviors of Nafion/Ti_(3)C_(2)T_(x) composite membrane at the molecular level. The results shown that there were significant differences about the diffusion kinetics of water molecules and hydroxium ions in Nafion/Ti_(3)C_(2)T_(x) at low and high hydration levels in the nanoscale *** the increase of water content, Ti_(3)C_(2)T_(x) in membrane was gradually surrounded by ambient water molecules to form a hydration layer, and forming a relatively continuous proton transport channel between Nafion polymer and Ti_(3)C_(2)T_(x) monomer. The continuous proton transport channel could increase the number of binding sites of proton and thus achieving high proton conductivity and high mobility of water molecules at higher hydration level. The current work can provide a theoretical guidance for designing new type of Nafion composite membranes.

关键词： Nafion/Ti_(3)C_(2)T_(x)composite membrane Proton transport Molecular dynamics simulation

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NUMERICAL SIMULATION OF A PODDED PROPULSOR IN VISCOUS FLOW

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Journal of Hydrodynamics 2009年第1期21卷 71-76页

作者： GUO chun-yu MA Ning yang Chen-jun State Key Laboratory of Ocean Engineering Shanghai Jiao Tong University Shanghai 200030 China

A podded propulsor in viscous flow is numerically simulated in this article. The region of fluid is divided into efficient calculation grids. The pressure and viscous force of blades, pod and strut are obtained as functions of an advance coefficient. The steady result is used as a base in the unsteady simulation to obtain a solution more quickly. The distributions of the thrust and torque fluctuations of the key blade in one revolution are obtained. The c^lculation results from the mixing plane on steady conditions are compared with those obtained from the sliding mesh model on unsteady conditions. The User-Defined Function （UDF） method is used to simulate the influence of ship hull on the non-uniform wake of the propeller.

关键词： podded propulsor propeller steady unsteady RANS

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Observers for Descriptor Systems with Slope-restricted Nonlinearities

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International Journal of Automation and computing 2010年第4期7卷 472-478页

作者： Lin-Na Zhou chun-yu yang Qing-Ling Zhang School of Business Administration Northeastern University Shenyang 110004 PRC Key Laboratory of Integrated Automation of Process Industry Ministry of Education Northeastern University Shenyang 110004 PRC Institute of Systems Science Northeastern University Shenyang 110004 PRC

This paper addresses the observer design problem for a class of nonlinear descriptor systems whose nonlinear terms are slope-restricted. The full-order observer is formulated as a nonlinear descriptor system. A linear matrix inequality （LMI） condition is derived to construct the full-order observer. The existence and uniqueness of the solution to the obtained observer system are guaranteed. Furthermore, under the same LMI condition and a common assumption, a reduced-order observer is designed. Finally, the design methods are reduced to a strict LMI problem and illustrated by a numerical example.

关键词： Descriptor systems slope-restricted nonlinearities observer linear matrix inequality (LMI)

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Practical Stability Analysis and Synthesis of Linear Descriptor Systems with Disturbances

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International Journal of Automation and computing 2008年第2期5卷 138-144页

作者： chun-yu yang Xin Jing Qing-Ling Zhang Lin-Na Zhou Institute of Systems Science Key Laboratory of Integrated Automation of Process Industry Ministry of Education~ Northeastern University Shenyang 110004 PRC

This paper considers the problems of practical stability analysis and synthesis of linear descriptor systems subject to timevarying and norm-bounded exogenous disturbances. A sufficient condition for the systems to be regular, impulsive-free and practically stable is derived. Then the synthesis problem is addressed and a state feedback controller is designed. To deal with the computational issue, the conditions of the main results are converted into linear matrix inequality （LMI） feasibility problems. Furthermore, two optimization algorithms are formulated to improve the system performances. Finally, numerical examples are given to illustrate the obtained results.

关键词： Linear descriptor systems disturbances practical stabilization practical stability linear matrix inequality (LMI)

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An Improved Approach to Delay-dependent Robust Stabilization for Uncertain Singular Time-delay Systems

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International Journal of Automation and computing 2010年第2期7卷 205-212页

作者： Xin Sun Qing-Ling Zhang chun-yu yang Zhan Su Yong-yun Shao Institute of Systems Science Northeastern University Shenyang 110004 PRC Key Laboratory of Integrated Automation of Process Industry Ministry of Education Northeastern University Shenyang 110004 PRC Department of Computer and Mathematics Teaching Shenyang Normal University Shenyang 110034 PRC

In this paper, delay-dependent stability analysis and robust stabilization for uncertain singular time-delay systems are addressed. By using Jensen integral inequality, an improved delay-dependent criterion of admissibility for singular time-delay systems is proposed in terms of linear matrix inequality （LMI）. Our new proposed criterion is less conservative and the numerical complexity is smaller than the existing ones. Based on this criterion, a state feedback controller is designed to ensure that the uncertain singular time-delay system is admissible. Finally, three numerical examples are employed to illustrate the effectiveness of the proposed method.

关键词： Delay-dependent singular time-delay systems admissible robust stabilization.

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TGF-β1 signal pathway in the regulation of inflammation in patients with atrial fibrillation

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Asian Pacific Journal of Tropical Medicine 2013年第12期6卷 999-1003页

作者： Ye Erbo lati.Ali Mira Muhuyati Wu-Hong Lu Peng-Yi He Zhi-Qiang Liu yu-chun yang Comprehensive Cardiology Department First Affiliated Hospital of Xinjiang Medical University Cardiac Institute First Affiliated Hospital of Xinjiang Medical University

Objective:To observe the expression changes of inflammatory markers TGF-β1,Smad3 and IL-6 in patients with atrial fibrillation(AF),and to explore the significance of TGF-β1 signaling pathway in the structural remodeling of ***:The expression of TGF-β1,Smad3 and IL-6 in 50 cases with AF and 30 normal cases were detected by RT-PCR and ***:The TGF-β1,Smad3 and IL-6 mRNA and protein expression levels in patients with AF were significantly higher than that in the control group(P0.05).The TGF-β1mRNA expression in the≥50 years subgroup was significantly higher than that in the<50years subgroups,and it was higher in the NYHAⅢsubgroup than in theⅠ/Ⅱgrade *** was also higher in the left ventricular ejection fraction(LVEF)<50%subgroup than in LVEF≥50%group,and it was significantly higher in the AF time≥36 months subgroup than that in<36months subgroup(P<0.05).The Smad3 and IL-6 expressions in the in the LVEF<50%subgroup were both high that than that in LVEF≥50%group,and higher in the AF time≥36 months subgroup than that in<36 months subgroup(P<0.05).There were a positive correlation between TGF-β1,Smad3 and IL-6(r=0.687,r=0.547).There were also a positive correlation between Smad3 and IL-6 mRNA(r=0.823).Conclusions:AF is associated with inflammation,and the inflammation is also involved in the fibrillation and sustain of *** TGF-β1 signal pathway may be involved in the process of atrial structural remodeling in patients with AF,and iss related with the occurrence and maintenance of AF.

关键词： Atrial fibrillation Transforming growth factor β1 Signal transduction Inflammation

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英国民族国家的历史建构与身份认同困境

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西北师大学报（社会科学版） 2016年第2期53卷 72-78页

作者：于春洋复旦大学民族研究中心上海200433 内蒙古工业大学马克思主义学院内蒙古呼和浩特010051

英国民族国家建构始于英格兰的民族建构与族性生成,而都铎王朝则对英格兰民族组建产生了巨大而深远的影响,并巩固了一个强大的主权国家。就前者而言,日耳曼人的征服为英格兰民族的形成创造了契机,黑斯廷斯战役的挫败以及随之而来的诺曼... 详细信息

英国民族国家建构始于英格兰的民族建构与族性生成,而都铎王朝则对英格兰民族组建产生了巨大而深远的影响,并巩固了一个强大的主权国家。就前者而言,日耳曼人的征服为英格兰民族的形成创造了契机,黑斯廷斯战役的挫败以及随之而来的诺曼人征服则促使英格兰民族逐渐走向成熟,百年战争的失利迫使英格兰重新审视自己的民族身份,最终在伊丽莎白一世时期确立了自己的海岛民族特性。就后者而言,都铎王朝让英格兰摆脱了对于罗马教皇的依附,剔除了外来势力的影响,进而通过海外殖民扩张、发展对外贸易与资本主义工商业、开展政治与宗教领域的改革等一系列富有成效的措施,不仅强化了中央政府的权威,巩固了王权,也激发了英格兰的爱国主义精神和民族主义情感。但是,英国的民族国家建构中一直存在着国家身份认同的困境,而伴随欧洲一体化进程的加快,欧洲身份认同问题也开始困扰着英国。身份认同问题将对英国的未来产生重要影响。

关键词：民族国家建构英国英格兰民族都铎王朝身份认同

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论民族政治发展的基本内涵

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云南民族大学学报（哲学社会科学版） 2012年第2期29卷 21-27页

作者：于春洋呼伦贝尔学院马克思主义学院内蒙古呼伦贝尔021008

民族政治发展的基本内涵可以由其定义、内容和实质3个方面来构成。就其定义而言,民族政治发展是民族政治由低级到高级的正向变迁过程,主要表现为民族政治体系的发展与完善,以及民族政治生活从传统到现代的变革,其最终目的是为作为政治... 详细信息

民族政治发展的基本内涵可以由其定义、内容和实质3个方面来构成。就其定义而言,民族政治发展是民族政治由低级到高级的正向变迁过程,主要表现为民族政治体系的发展与完善,以及民族政治生活从传统到现代的变革,其最终目的是为作为政治发展主体的民族共同体提供一种持久而深沉的政治关怀;就其内容而言,可以从"作为过程的民族政治发展"和"作为目标的民族政治发展"两个方面来加以说明;而基于"作为载体发展的民族政治发展"和"作为主体发展的民族政治发展"的不同视角,民族政治发展则表现出了复合型的双重实质。

关键词：民族政治发展基本内涵定义内容实质

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Ideal Bi-Based Hybrid Anode Material for Ultrafast Charging of Sodium-Ion Batteries at Extremely Low Temperatures

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NANO-MICRO LETTERS 2025年第1期17卷 1-16页

作者： Bai, Jie Jia, Jian Hui Wang, yu yang, chun Cheng Jiang, Qing Jilin Univ Key Lab Automobile Mat Sch Mat Sci & Engn Minist Educ Changchun 130022 Peoples R China

Metallic nanoparticles with excellent size controllability and high loading rate are obtained via ultrafast high temperature shock *** Bi/CNRs-15 electrode exhibits an unprecedented rate performance (237.9 mAh g-1 at 2 A g-1) at - 60 degrees C, while the energy density of the full cell can reach to 181.9 Wh kg-1 at - 40 degrees C.A novel strategy of high-rate activation is proposed to obtain high capacity and superior stability at low temperature by creating new active sites for interfacial reaction. Sodium-ion batteries have emerged as competitive substitutes for low-temperature applications due to severe capacity loss and safety concerns of lithium-ion batteries at - 20 degrees C or lower. However, the key capability of ultrafast charging at ultralow temperature for SIBs is rarely reported. Herein, a hybrid of Bi nanoparticles embedded in carbon nanorods is demonstrated as an ideal material to address this issue, which is synthesized via a high temperature shock method. Such a hybrid shows an unprecedented rate performance (237.9 mAh g-1 at 2 A g-1) at - 60 degrees C, outperforming all reported SIB anode materials. Coupled with a Na3V2(PO4)3 cathode, the energy density of the full cell can reach to 181.9 Wh kg-1 at - 40 degrees C. Based on this work, a novel strategy of high-rate activation is proposed to enhance performances of Bi-based materials in cryogenic conditions by creating new active sites for interfacial reaction under large current.

关键词： Bi nanoparticles High temperature shock High-rate activation Ultrafast charging Low-temperature sodium-ion batteries

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