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Magnetic-field-assisted triboelectric nanogenerator for harvesting multi-directional wave energy

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Nano Research 2024年第8期17卷 7144-7152页

作者： Mengru Ding Jianlong wang da Zhao Hengyu Li Xiaojun cheng Jianming Wen Zhong Lin wang Tinghai cheng Beijing Institute of Nanoenergy and Nanosystems Chinese Academy of SciencesBeijing 101400China School of Nanoscience and Engineering University of Chinese Academy of SciencesBeijing 100049China Guangzhou Institute of Blue Energy Guangzhou 510555China College of Engineering Zhejiang Normal UniversityJinhua 321004China School of Materials Science and Engineering Georgia Institute of TechnologyAtlantaGA 30332-0245USA

Ocean wave energy is a significant and promising source of renewable ***,the energy harvesting is challenging due to the multi-directional nature of *** paper proposes a magnetic-field-assisted triboelectric nanogenerator(MFATENG)for harvesting multi-directional wave *** incorporating a magnetic field,the planar motion of the pendulum is converted into spatial motion,increasing the triggering of multilayered TENG(M-TENG)and enhancing the output energy of the *** results demonstrate that the output energy of the MFA-TENG is increased by 73%by utilizing the magnetic ***,a spring model based on the origami-structured M-TENG is established to analyze the effect of different equivalent stiffnesses on the performance of the M-TENG,aiming to obtain optimal output *** results showcase the impressive output performance of the M-TENG,generating outputs of 250 V,18μA,and 255 ***,the proposed MFA-TENG effectively harvests multi-directional wave energy under water-wave driven *** study significantly enhances the ability of the MFA-TENG to harvest multi-directional wave energy and presents a promising approach for self-powered marine monitoring in the future.

关键词： triboelectric nanogenerator magnetic-field-assisted spring model multi-directional wave energy

MD simulation of high-resolution X-ray structures reveals post-translational modification dependent conformational changes in HSF-DNA interaction

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Protein & Cell 2016年第12期7卷 916-920页

作者： Han Feng Sheng wang Ling Guo Avinash S. Punekar Rudolf Ladenstein da-cheng wang Wei Liu National Laboratory of Biomacromolecules Institute of Biophysics Chinese Academy of Sciences Beijing 100101 China Key Laboratory of Molecular Biophysics of the Ministry of Educa- tion College of Life Science and Technology Huazhong University of Science and Technology Wuhan 430074 China Institute of Immunology The Third Military Medical University Chongqing 400038 China Department of Biosciences and Nutrition Karolinska Institutet NOVUM 14183 Huddinge Sweden

Dear Editor, Heat shock factors （HSFs） constitute a transcription factor family playing regulatory roles in maintaining cellular protein homeostasis or mediating cell differentiation and develop- ment （Akerfelt et al., 2010, Bjork and Sistonen 2010, Westerheide et al., 2012）. Some human diseases such as cancer and neurodegeneration are often linked with mal- function of HSFs （dai et al., 2007, Neef et al., 2011, Scherz- Shouval et al., 2014）. The human HSF family consists four members： HSF1-4, which exhibit tissue-specific expression profiles and possess unique but overlapping functions. HSF1 is the major regulator of the heat shock response.

关键词： Minor Groove Major Groove Significant Conformational Change Sumo Modification Attenuation Phase

Two new secoiridoid glycosides from the roots of Picrorhiza scrophulariiflora

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Chinese Chemical Letters 2008年第10期19卷 1224-1227页

作者： Lian Chun Zou Tong Fei Zhu Shu Cai Gan da cheng wang Yu Zhang Xu Ming Deng College of Animal Science and Veterinary Medicine Jilin University Changchun 130062 China College of Chemistry Jilin University Changchun 130062 China Department of Traditional Chinese Materia Medica Shenyang Pharmaceutical University Shenyang 110016 China School of pharmacy Shenyang Pharmaceutical University Shenyang 110016 China

From the roots ofPicrorhiza scrophulariiflora, two new secoifidoid glycosides, named picrosecosides Ⅰ and Ⅱ （1, 2） have been isolated. Their structures were elucidated on the basis of chemical and spectropic evide... 详细信息

关键词： Picrorhiza scrophulariiflora Secoiridoid glycosides Picrosecosides Ⅰ and Ⅱ

Two new phenylethanoid glycosides and a new secoiridoid glycoside from the roots of Picrorhiza scrophulariiflora

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Chinese Chemical Letters 2010年第9期21卷 1103-1106页

作者： Lian Chun Zou Zhi Hui Yan Tong Fei Zhu Hua Xiang da cheng wang Xu Ming Deng Collegeof Animal Science and Veterinary Medicine Jilin University Changchun 130062 China Teaching Center of Basic Courses Jilin University Changchun 130062 China Chongqing Medical and Pharmaceutical College Chongqing 400030 China

Two new phenylethanoid glycosides,named scroside H（1）,scroside I（2）,and a new secoiridoid glycoside,named picrogentioside I（3）,have been isolated from the underground parts of Picrorhiza *** structures were eluc... 详细信息

关键词： Picrorhiza scrophulariiflora Phenylethanoid glycoside Secoiridoid glycoside

A synthesis of the Cretaceous wildfire record related to atmospheric oxygen levels?

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Journal of Palaeogeography 2024年第1期13卷 149-164页

作者： da-Wei Lü Wen-Xu Du Zhi-Hui Zhang Yuan Gao Tian-Tian wang Jin-cheng Xu Ao-Cong Zhang cheng-Shan wang Shandong Provincial Key Laboratory of Depositional Mineralization and Sedimentary Minerals College of Earth Sciences and EngineeringShandong University of Science and TechnologyQingdao 266590Shandong ProvinceChina School of Earth Sciences and Resources China University of GeosciencesBejing 100083China Institute of Earth Sciences China University of Geosciences(Bejing)Beijing 100083China

The Cretaceous was a significant greenhouse period in Earth's history with higher atmospheric CO_(2) levels and temperatures than today. Although evidence of combustion has been widely described from the Cretaceous deposits, our understanding of the spatiotemporal diversification pattern and process of the Cretaceous wildfires is still limited. In this study, we comprehensively synthesize a total of 271 published Cretaceous wildfire occurrences based on the by-products of burning, including fossil charcoal, pyrogenic inertinite(fossil charcoal in coal), and pyrogenic polycyclic aromatic hydrocarbons(PAHs). Spatially, the dataset shows a distinctive distribution of reported wildfire evidence characterized by high concentration in the middle latitudinal areas of the Northern Hemisphere(30°N-60°N) over the Cretaceous. Temporally, an overall increasing trend of the reported wildfire data from the Early Cretaceous to the Late Cretaceous is coincident with higher atmospheric O_(2) levels. However, the spatial and temporal patterns may result from many types of factors, such as taphonomy, preservation, and researcher biases, instead of a real picture of the Cretaceous wildfire evolution. To better understand the spatiotemporal diversification of the Cretaceous wildfire, more investigations on the record of wildfire occurrences during this period would be necessary in the future.

关键词： Wildfire Cretaceous Atmospheric oxygen Taphonomy Charcoal

Performance analysis of rate-adaptive cooperative MAC based on wireless local area networks

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The Journal of China Universities of Posts and Telecommunications 2009年第5期16卷 78-85页

作者： ZHANG Yang , XU Hong-kun, CHANG Yong-yu, YANG da-cheng, wang Ya-feng School of Information and Communication Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China School of Information and Communication Engineering Beijing University of Posts and Telecommunications Beijing 100876 China

Bi-dimensional Markov chain model based on cooperative medium access control （MAC） of wireless local area networks （WLAN） is considered to reflect system performance accurately. Two basic factors that affect the analysis results are station retry limits and non-saturated transmit probability. A uniform solution considering both factors is proposed. To prove the theoretical analysis, a cooperative MAC （CoopMAC） topology is established and the simulation model is enhanced by changing the cooperative table to the nodes＇ memory with more information added. Meanwhile, the three-way handshake scheme is modified and a handshake threshold is set based on the packet size. Simulation results show the performance analytical model is accurate, and the rate-adaptive cooperative MAC protocol significantly improves the network performance in terms of non-saturated system throughput and delay.

关键词： performance analysis cooperative MAC bi-dimensional Markov Chain non-saturated transmit station retry limit

Triple reverse order law for the Drazin inverse

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Applied Mathematics(A Journal of Chinese Universities) 2024年第1期39卷 55-68页

作者： wang Hua ZHONG cheng-cheng College of Sciences Inner Mongolia University of TechnologyHohhot 010051China College of Engineering University of Jinan Quancheng CollegeYantai 265600China

In this paper,we investigate the reverse order law for Drazin inverse of three bound-ed linear operators under some commutation ***,the Drazin invertibility of sum is also obtained for two bounded linear operators and... 详细信息

关键词： Drazin inverse reverse order law space decomposition

Quantized bound states around a vortex in anisotropic superconductors

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Science China(Physics,Mechanics & Astronomy) 2024年第6期67卷 146-155页

作者： Ke Xiang da wang Qiang-Hua wang National Laboratory of Solid State Microstructures&School of Physics Nanjing UniversityNanjing 210093China Collaborative Innovation Center of Advanced Microstructures Nanjing 210093China

The bound states around a vortex in anisotropic superconductors is a longstanding yet important *** this work,we develop a variational theory on the basis of the Andreev approximation to obtain the energy levels and wave functions of the low-energy quantized bound states in superconductors with anisotropic pairing on arbitrary Fermi *** the case of circular Fermi surface,the effective Schr¨odinger equation yielding the bound state energies gets back to the theory proposed by Volovik and Kopnin many years *** generalization here enables us to prove the equidistant energy spectrum inside a vortex in a broader class of *** importantly,we are now able to obtain the wave functions of these bound states by projecting the quasiclassical wave function on the eigenmodes of the effective Schr¨odinger equation,going beyond the quasiclassical Eilenberger results,which,as we find,are sensitive to the scattering *** the case of isotropic Fermi surface,the spatial profile of the low-energy local density of states is dominated near the vortex center and elongates along the gap antinode directions,in addition to the ubiquitous Friedel oscillation arising from the quantum inteference neglected in the Eilenberger ***,as a consequence of the pairing anisotropy,the quantized wave functions develop a peculiar distribution of winding number,which reduces stepwise towards the vortex *** work provides a flexible way to study the vortex bound states in the future.

关键词： vortex bound state anisotropic superconductor Andreev approximation

Amide naphthotubes:Biomimetic macrocycles for selective molecular recognition

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Chinese Chemical Letters 2024年第4期35卷 124-131页

作者： cheng-da Zhao Huan Yao Shi-Yao Li Fangfang Du Li-Li wang Liu-Pan Yang School of Pharmaceutical Science Postdoctoral Research Station of Basic MedicineHengyang Medical SchoolUniversity of South ChinaHengyang 421001China

Selective molecular recognition in water is routine for bioreceptors,but remains challenging for synthetic *** is principally because noncovalent interactions are usually less efficient in aqueous *** mimicking the cavity feature of bioreceptors,*** Jiang proposed and clarified the concept of“endo-functionalized cavity”.Through situating polar binding sites into a deep hydrophobic cavity,we designed and synthesized several macrocyclic hosts,among which amide naphthotubes are the most *** hosts can selectively recognize various polar molecules including organic micropollutants,drug molecules,and chiral molecules in water by employing the hydrophobic effect and shielded hydrogen *** addition,these biomimetic hosts have been applied in spectroscopic analysis,adsorptive separation and *** this review,we provide an overview of recent advances on amide naphthotubes with special emphasis on the efforts of Jiang's *** are convinced that these biomimetic macrocycles will make further contributions to supramolecular chemistry and beyond.

关键词： Molecular recognition Supramolecular chemistry Amide naphthotube Endo-functionalized cavity Biomimetic macrocycle