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Novel photocatalytic reactor for degradation of DDT in water and its optimization model

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2009年第5期10卷 732-738页

作者： Wei-hai PANG nai-yun GAO Yang DENG yu-lin TANG State Key Laboratory of Pollution Control and Resources Reuse Tongji University Shanghai 200092 China Department of Civil Engineering and Surveying University of Puerto Rico at Mayaguez Mayaguez PR 00681 USA

A novel photocatalytic reactor was developed to remove （1,1-bis（4-chlorophenyl）-2,2,2-trichloroethane）（DDT） from water. In the reactor, a cenosphere was used to support TiO2 film made by means of sol-gel. Because the cenospheres were coated with TiO2, their specific gravity was slightly increased from the original 0.6-0.8 to 0.8-0.9, so that they were able to be suspended in water. With the mixed operation of a bubbler, the water in the reactor was in a well-fluidized state. The bottom of the reactor is a sand filter bed, which can be used to prevent the photocatalyst from being lost. A mathematical model of the reactor has been developed in the two primary influential factors： ultraviolet （UV） light intensity and photocatalyst concentration. With such a model, the reactor can be designed more reasonably.

关键词： Photocatalytic reactor Persistent organic pollutants (POPs) Reactor model

Laguerre Isoparametric Hypersurfaces in R^n with Two Distinct Non-zero Principal Curvatures

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Acta Mathematica Sinica,English Series 2014年第1期30卷 169-180页

作者： yu ping SONG School of Mathematical Sciences Xiamen University

An umbilical free oriented hypersurfacex：M→Rnwith non-zero principal curvatures is called a Laguerre isoparametric hypersurface if its Laguerre form C=i Ciωi=iρ1（Ei（logρ）（r ri）Ei（r））ωi vanishes and Laguerre shape operator S=ρ1（S 1 rid）has constant ***ρ=i（r ri）2,r=r1＋r2＋···＋rn 1n 1is the mean curvature radius andSis the shape operator ofx.{Ei}is a local basis for Laguerre metric g=ρ2III with dual basis{ωi}and III is the third fundamental form *** this paper,we classify all Laguerre isoparametric hypersurfaces in Rn（n〉3）with two distinct non-zero principal curvatures up to Laguerre transformations.

关键词： Laguerre geometry isoparametric hypersurfaces non-zero principal curvatures

Effects of Different Compatibilizing Agents on the Interfacial Adhesion Properties of Polypropylene/Magnesium Oxysulfate Whisker Composites

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Chinese Journal of Polymer Science 2017年第9期35卷 1143-1155页

作者： Li Dang Xue-ying nai Xin Liu Dong-hai Zhu Ya-ping Dong 李武 Key Laboratory of Salt Lake Resources Chemistry Qinghai Institute of Salt Lakes Chinese Academy of Sciences Xining 810008 China Key Laboratory of Comprehensive andHighly Efficient Utilization of Salt Lake Resources Qinghai Institute of Salt Lakes Chinese Academy of Sciences Xining 810008 China University of Chinese Academy of Sciences Beijing 100049 China

The effects of maleic anhydride-grafted polypropylene （PP-g-MAH） and maleic anhydride-grafted polyolefin elastomer （POE-g-MAH） on interracial adhesion properties of the polypropylene/magnesium oxysulfate whiskers （PP/MOSw） composites were investigated via mechanical, thermal, ATR-FTIR and rheological tests. Although significant increases in yield strength and Young＇s modulus were observed in PP-g-MAH treated composites, a sharp decline in these properties was observed in POE-g-MAH treated composites. ATR-FTIR results indicated that esterification occurred between the hydroxyl groups of MOSw and the carbonyls of anhydrides of both compatibilizers but POE-g-MAH was still incompatible with the PP matrix, as verified by the presence of shoulder peaks in DTG curves and numerous voids in SEM micrographs. On the other hand, PP-g-MAH was highly compatible with the PP matrix, as evidenced by the peaks in DTG curves and vague interfaces with wrapped melts on the surface of MOSw. Rheological behaviors also confirmed that introducing PP-g-MAH resulted in a transition from liquid-like to solid-like, which was attributed to the stronger interfacial adhesion between MOSw and the PP matrix. POE-g-MAH treated composites, in contrast to PP-g-MAH, maintained liquid- like rheological behaviors as typical molten polymers. There is likely a MOSw network formed in the PP/15PP-g- MAH/15MOSw composite as suggested by the significant deviation of G＇ versus G＂ plots and the two crossover frequencies observed in plots of tan6versus frequency.

关键词： Compatibility Interfacial adhesion Mechanical properties Rheological behaviors

掺杂磷烯二维纳米材料对草甘膦吸附机理的研究

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原子与分子物理学报 2025年第4期42卷 58-64页

作者：王群周乃武单正莉覃庆雨刘钰佳王梅梅青刚孙玉希绵阳师范学院生命科学与技术学院绵阳621006 绵阳师范学院化学与化学工程学院绵阳621000 绵阳师范学院光致功能材料重点实验室绵阳621006 曲阜师范大学生命有机分析重点实验室曲阜273165 北京市食品风味化学重点实验室北京100048

草甘膦是世界上普遍使用的除草剂之一,被广泛使用在农田和非农田杂草的防治.由于草甘膦类除草剂的大范围应用,其对动植物的危害性逐渐受到人们的关注.磷烯二维纳米材料与草甘膦之间相互作用机理的研究对草甘膦的检测及去除具有重大的意... 详细信息

草甘膦是世界上普遍使用的除草剂之一,被广泛使用在农田和非农田杂草的防治.由于草甘膦类除草剂的大范围应用,其对动植物的危害性逐渐受到人们的关注.磷烯二维纳米材料与草甘膦之间相互作用机理的研究对草甘膦的检测及去除具有重大的意义.本研究将采用基于密度泛函理论方法考察本征及Al,Ca,Ti及Fe金属原子掺杂的磷烯对草甘膦的吸附,通过吸附能,差分电荷密度,布居电荷分析本征及金属原子掺杂磷烯对草甘膦的吸附机制,从分子和原子水平上研究它们之间的详细机理.研究结果有望为掺杂磷烯材料在草甘膦吸附方面的应用提供有意义的理论参考.

关键词：磷烯掺杂磷烯草甘膦密度泛函理论

Rapid treatment of atrazine-contaminated water by nickel/iron bimetallic system

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Journal of Environmental Sciences 2004年第6期16卷 925-927页

作者： WEIHong TONGShao-ping WANGHong-yu LIUWei-ping InstituteofEnvironmentalScience ZhejiangUniversityHangzhou310029China. DepartmentofAppliedChemistry ZhejiangUniversityofTechnologyHangzhou310032China CollegeofCivilEngineeringandArchitecture ZhejiangUniversityofTechnologyHangzhou310032China

The utility of nickel/iron in the remediation of atrazine-contaminated water was investigated. The experimental results showed that nickel/iron had effective catalytic activity in dechlorinating atrazine under acidic conditions. The dechlorination reaction approximately followed the first-order kinetics under the experimental conditions(nickel/iron:1.0 g/250 ml;C atrazine=20.0 mg/L), the reaction rate increased with decreasing pH value of the reaction solution and increasing the proportion of Ni:Fe within 2.95%. For condition with 2.95% nickel/iron, the reaction rate constants were 0.07518(R=0.9927), 0.06212(R=0.9846) and 0.00131 min -1(R=0.9565) at pH=2.0, 3.0 and 4.0, respectively. HPLC analysis was used to monitor the decline of atrazine concentration.

关键词： atrazine nickel/iron bimetallic system dechlorination reaction first-order kinetics

Overview of yeast environmental stress response pathways and the development of tolerant yeasts

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Systems Microbiology and Biomanufacturing 2022年第2期2卷 232-245页

作者： nai-Xin Lin Yan Xu Xiao-Wei yu Lab of Brewing Microbiology and Applied Enzymology School of BiotechnologyJiangnan UniversityWuxi 214122China Key Laboratory of Industrial Biotechnology Ministry of EducationSchool of BiotechnologyJiangnan UniversityWuxi 214122China

Yeast is widely used for industrial production of various types of products,such as ethanol and ***,its fermentation efficiency is strongly reduced by harmful environmental ***,harmful environmental stresses damage important cellular components,such as cell wall,cell membrane,proteins,***,these damages cause cellular metabolic disorders or even *** the past decades,there has been a portfolio of studies on the environmental stress tolerance of yeasts,which mainly aimed at cell damages caused by different environmental stresses,different ways to improve yeast environmental stress tolerance or a tolerance mechanism for certain environmental ***,a comprehensive overview of how yeasts respond to environmental stresses is lacking,and the correlation of tolerance mechanism between different environmental stresses is *** this review,we summarized the general damages induced by most of environmental stresses,the existing major mechanisms of environmental stress tolerance from the perspective of key signalling pathways,and the common ways to improve the resistance to environmental stresses in yeast *** tolerance mechanisms of yeast cells to different environmental stresses are diverse,but sometimes they share the same signalling *** use sensors on the cell surface to recognize environmental stresses and transmit signals to the nucleus to cause changes in gene *** summarizing the main signalling pathways,including MAPK pathway,cAMP/PKA pathway,YAP1/SKN7 pathway,it will provide a powerful reference for future efforts to promote yeast environmental stress tolerance and study yeast tolerance mechanisms.

关键词： Yeast Environmental stress Signalling pathway Protein aggregation

A Robust Adaptive Dynamic Programming Principle for Sensorimotor Control with Signal-Dependent Noise

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Journal of Systems Science & Complexity 2015年第2期28卷 261-288页

作者： JIANG yu JIANG Zhong-ping Department of Electrical and Computer Engineering Polytechnic School of EngineeringNew York University6 Metrotech Center

As human beings,people coordinate movements and interact with the environment through sensory information and motor adaptation in the daily *** characteristics of these interactions can be studied using optimization-based models,which assume that the precise knowledge of both the sensorimotor system and its interactive environment is available for the central nervous system(CNS).However,both static and dynamic uncertainties occur inevitably in the daily *** these uncertainties are taken into consideration,the previously developed models based on optimization theory may fail to explain how the CNS can still coordinate human movements which are also robust with respect to the *** order to address this problem,this paper presents a novel computational mechanism for sensorimotor control from a perspective of robust adaptive dynamic programming(RADP).Sharing some essential features of reinforcement learning,which was originally observed from mammals,the RADP model for sensorimotor control suggests that,instead of identifying the system dynamics of both the motor system and the environment,the CNS computes iteratively a robust optimal control policy using the real-time sensory *** online learning algorithm is provided in this paper,with rigorous convergence and stability ***,it is applied to simulate several experiments reported from the past *** comparing the proposed numerical results with these experimentally observed data,the authors show that the proposed model can reproduce movement trajectories which are consistent with experimental *** addition,the RADP theory provides a unified framework that connects optimality and robustness properties in the sensorimotor system.

关键词： Adaptive dynamic programming human motor adaptation robust optimal control.

Social Sensors (S^2ensors): A Kind of Hardware-Software-Integrated Mediators for Social Manufacturing Systems Under Mass Individualization

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Chinese Journal of Mechanical Engineering 2017年第5期30卷 1150-1161页

作者： Kai Ding ping-yu Jiang State Key Laboratory for Manufacturing Systems Engineering Xi'an Jiaotong University

Currently, little work has been devoted to the mediators and tools for multi-role production interactions in the mass individualization environment. This paper proposes a kind of hardware-software-integrated mediators called social sensors （S2ensors） to facilitate the production interactions among customers, manufacturers, and other stakeholders in the social manufacturing systems （SMS）. The concept, classification, operational logics, and for- malization of S2ensors are clarified. S2ensors collect sub- jective data from physical sensors and objective data from sensory input in mobile Apps, merge them into meaningful information for decision-making, and finally feed the decisions back for reaction and execution. Then, an S2en- sors-Cloud platform is discussed to integrate different S2- ensors to work for SMSs in an autonomous way. A demonstrative case is studied by developing a prototype system and the results show that S2ensors and S2ensors- Cloud platform can assist multi-role stakeholders interact and collaborate for the production tasks. It reveals the mediator-enabled mechanisms and methods for production interactions among stakeholders in SMS.

关键词： Social sensors Social manufacturing system Individualized production Production interaction

Induced pluripotent stem cell technology for spinal cord injury: a promising alternative therapy

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Neural Regeneration Research 2021年第8期16卷 1500-1509页

作者： yu Li ping-ping Shen Bin Wang Clinical Stem Cell Center the Affiliated Drum Tower Hospital of Nanjing University Medical SchoolSchool of Life ScienceNanjing UniversityNanjingJiangsu ProvinceChina State Key Laboratory of Pharmaceutical Biotechnology and The Comprehensive Cancer Center the Affiliated Drum Tower Hospital of Nanjing University Medical SchoolSchool of Life ScienceNanjing UniversityNanjingJiangsu ProvinceChina Clinical Stem Cell Center the Affiliated Drum Tower Hospital of Nanjing University Medical SchoolNanjingJiangsu ProvinceChina

Spinal cord injury has long been a prominent challenge in the trauma repair process. Spinal cord injury is a research hotspot by virtue of its difficulty to treat and its escalating morbidity. Furthermore, spinal cord injury has a long period of disease progression and leads to complications that exert a lot of mental and economic pressure on patients. There are currently a large number of therapeutic strategies for treating spinal cord injury, which range from pharmacological and surgical methods to cell therapy and rehabilitation training. All of these strategies have positive effects in the course of spinal cord injury treatment. This review mainly discusses the problems regarding stem cell therapy for spinal cord injury, including the characteristics and action modes of all relevant cell types. Induced pluripotent stem cells, which represent a special kind of stem cell population, have gained impetus in cell therapy development because of a range of advantages. Induced pluripotent stem cells can be developed into the precursor cells of each neural cell type at the site of spinal cord injury, and have great potential for application in spinal cord injury therapy.

关键词： axon regeneration cell therapy functional recovery induced pluripotent stem cell mesenchymal stem cell neural cells neural precursor cell neural stem cell remyelination spinal cord injury stem cells