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基于非对称纤维素纳米纤维异质膜的水传输促进渗透能量转换

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Science China Materials 2024年第8期67卷 2567-2574页

作者：侯淑华赵佳利张哲华胡宇浩付林钱永超陈伟鹏周圣阳孔祥玉闻利平 College of Chemistry and Materials Engineering Bohai UniversityJinzhou 121013China CAS Key Laboratory of Bio-inspired Materials and Interfacial Science Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China School of Future Technology University of Chinese Academy of SciencesBeijing 100049China

海洋渗透能是最有前景的可持续能源之一.非对称纳米通道膜由于其优越的离子选择性在海洋渗透能转化中受到广泛关注,但较低的离子通量仍然是其需要突破的瓶颈.本文采用纤维素纳米纤维和磺化聚砜(SPSf40)制备了非对称异质膜,这种非对称异... 详细信息

海洋渗透能是最有前景的可持续能源之一.非对称纳米通道膜由于其优越的离子选择性在海洋渗透能转化中受到广泛关注,但较低的离子通量仍然是其需要突破的瓶颈.本文采用纤维素纳米纤维和磺化聚砜(SPSf40)制备了非对称异质膜,这种非对称异质膜有效地提高了离子电导率,通过混合人工河流和海水的输出功率密度可达8.3 W/m^(2).与传统的离子交换膜相比,非对称异质膜的离子电导率和最大功率密度分别提高了325.0%和48.2%.从海水(非对称异质膜的疏水侧)到河水(非对称异质膜的亲水侧)的输运抑制了水的渗透压,有助于高离子的传输通量,提高了海洋渗透能量转换效率.高离子选择性的浸润梯度膜为渗透转化膜的开发提供了一种新方法.

关键词：离子选择性能量转换效率离子电导率可持续能源离子交换膜纤维素纳米纤维水传输磺化聚砜

Real-Space Renormalization Group Approach of the Potts Model on the Octagonal Quasi-Periodic Tiling

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Wuhan University Journal of Natural Sciences 1998年第3期3卷 39-42页

作者： Xiong, Gang zhang, zhehua Tian, Decheng

A one step real space renormalization group(RSRG)transformation is used to study the ferromagnetic(FM)Potts model on the two dimemsional (2D) octagonal quasi periodic tiling(OQT). The critical exponents of the correlation length in the q =1,2,3,4 cases and the crtitical surface of the Ising model are obtained. The results are discussed by comparing with previous results on the OQT and the square lattice(SQL).

关键词： renormalization,quasi periodic critical exponent

Calculation of the Energy Spectra of Atom Rb in Strong Magnetic Fields

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Chinese Physics Letters 1993年第7期10卷 405-408页

作者： LIU Lianjun zhang zhehua GAO Daoneng CAO Yaohui HE Xinghong LI Baiwen Department of Physics Wuhan UniversityWuhan 430072 Wuhan Institute of Physics Academia SinicaWuhan 430071

The energy spectra and oscillator strength of atom Rb in strong magnetic fields are *** wavefunctions obtained by an improved potential model proposed by some of us are chosen as the zero-order *** results show that the diamagnetic term seems to affect substantially only high Rydberg *** there is a maximum of oscillator strength in each n-manifold,which varies with n increased.

关键词： states oscillator manifold

Design and Experimental Investigation for Subsea Control Module Test System

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Journal of Marine Science and Application 2020年第3期19卷 453-464页

作者： Peng Jia zhehua zhang Xiangyu Wang Feihong Yun Honghai Wang Gang Wang College of Mechanical and Electronic Engineering Harbin Engineering UniversityHarbin 150001China

As a core part of subsea production systems,subsea control modules(SCMs)are costly,difficult,and expensive to install and inconvenient to use in underwater ***,performance and function tests must be carried out before launching *** study developed a testing device and an SCM test by investigating SCMs and their *** testing device includes four parts:a hydraulic station,an SCM test stand,a signal generating device,and an electronic test ***,the basic indices of the testing device were determined from the performance and working parameters of the ***,the design scheme of the testing device for the SCM was tentatively proposed,and each testing device was ***,a practical measurement of the SCM,in combination with the hydraulic station,SCM test stand,signal generator,electronic unit,and highpressure water tank,was carried out according to the test *** measurement mainly involved equipment inspection before testing and an experimental test for the *** validity and feasibility of the testing device and method were simultaneously verified through an association test.

关键词： Subsea control module Testing device Hydraulic system Electronic control system Experimental research

Temperature difference-enhanced salinity gradient energy conversion enabled by thermostable hydrogel membrane with anti-swelling property

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Nano Research 2023年第8期16卷 11288-11295页

作者： zhehua zhang Teng Zhou Xiang-Yu Kong Yadong Wu Weiwen Xin Yanglansen Cui Linsen Yang Tingyang Li Xin Li Qingchen Wang Weipeng Chen Lei Jiang Liping Wen Key Laboratory of Bio-inspired Materials and Interfacial Science Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100049China School of Future Technology University of Chinese Academy of SciencesBeijing 100049PChina College of Mechanical and Electrical Engineering Hainan UniversityHaikou 570228China Binzhou Institute of Technology Binzhou 256600China

Coupling low-grade heat(LGH)with salinity gradient is an effective approach to increase the efficiency of the nanofluidic-membrane-based power ***,it is a challenge to fabricate membranes with high charge density that ensures ion permselectivity,while maintaining chemical and mechanical stability in this composite ***,we develop a bis[2-(methacryloyloxy)ethyl]phosphate(BMAP)hydrogel membrane with good thermal stability and anti-swelling property through self-crosslinking of the selected *** taking advantage of negative space charge and three-dimensional(3D)interconnected nanochannels,salinity gradient energy conversion efficiency is substantially enhanced by temperature *** and experimental results verify that LGH can largely weaken the concentration polarization,promoting transmembrane ion *** a result,such a hydrogel membrane delivers high-performance energy conversion with a power density of 11.53 W·m^(−2)under a negative temperature difference(NTD),showing a 193%increase compared with that without NTD.

关键词： ion transport temperature difference-enhanced salinity gradient energy self-crosslinking hydrogel membranes space charge

The Calculation of Ground State Energies of Double-Electron Systems in an Uniform Magnetic Field below 10~9 G

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Wuhan University Journal of Natural Sciences 1999年第1期4卷 51-55页

作者： Wu Liangkai Liu Lianjun zhang zhehua

Energies for the ground states of double electron systems in a uniform magnetic field B≤ 10 9 G are calculated by using the modified Slater basis and configuration interaction method, and the result for energy i... 详细信息

关键词： double electron system MCI method magnetic field ground state energy

Cement-and-pebble nanofluidic membranes with stable acid resistance as osmotic energy generators

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Science China Materials 2022年第10期65卷 2729-2736页

作者： Yifei Zhao Weiwen Xin Yongchao Qian zhehua zhang Yadong Wu Xiangbin Lin Xiang-Yu Kong Lei Jiang Liping Wen CAS Key Laboratory of Bio-inspired Materials and Interfacial Science Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China School of Future Technology University of Chinese Academy of SciencesBeijing 100049China

Osmotic energy between river water and seawater has attracted interest as a new source of sustainable *** membranes in a reverse electrodialysis configuration can capture energy from salinity ***,current membrane materials suffer from high resistances,low stabilities,and low charge densities,which limit their further ***,we designed a high-performance nanofluidic membrane using carboxylic cellulose nanofibers functionalized with graphene oxide nanolamellas with cement-and-pebble microstructures and stable skeletons for enhanced ion transmembrane *** mixing artificial river water and seawater,the composite membrane achieved a high output power density up to 5.26 W m^(−2).Additionally,the membrane had an excellent acid resistance,which enabled long-term use with over 67 W m^(−2) of power *** performance of this composite membrane benefited from the mechanically strong cellulose fibers and the bonding between nanofibers and *** this work,we highlight promising directions in industrial waste treatment using energy extracted from chemical potential gradients.

关键词： cement-and-pebble membrane ion transport osmotic energy conversion nanoconfined fluidic channels chargedriven ion diffusion

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美国社区学院教育国际化:历程、措施及启示

职业技术教育 2018年第16期39卷 74-79页

作者：张哲华安康学院外语学院

美国社区学院教育国际化是美国提升国际竞争力的基本手段。20世纪60年代至今,美国社区学院基于时代社会发展形势及国家教育整体战略,大力推进其教育国际化,整体上经历了四个发展阶段。在发展过程中,通过构建区域性校际联盟来实现资源共... 详细信息

美国社区学院教育国际化是美国提升国际竞争力的基本手段。20世纪60年代至今,美国社区学院基于时代社会发展形势及国家教育整体战略,大力推进其教育国际化,整体上经历了四个发展阶段。在发展过程中,通过构建区域性校际联盟来实现资源共享,通过推进国际教育本土化、实施留学项目多元化来提升学生国际视野,通过扩大招收外国留学生来推进师资建设国际化,通过国际教育政策战略化来提升毕业生的国际素养。这些举措对于我国高职院校、应用型本科院校的教育国际化发展具有一定的借鉴意义。

关键词：美国社区学院教育国际化发展历程措施

High-Coverage Quantitative Metabolomics Requires Spot-Urine and Spot-Feces Sample Collection in Mouse Model Studies

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High-Coverage Quantitative Metabolomics Requires Spot-Urine ...