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Hierarchical ferric-cobalt-nickel ternary oxide nanowire arrays supported on graphene fibers as high-performance electrodes for flexible asymmetric supercapacitors

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Nano Research 2018年第4期11卷 1775-1786页

作者： Jingxin zhao Chaowei Li Qichong Zhang jun Zhang Xiaona Wang Juan Sun Juanjuan Wang Jixun Xie Ziyin Lin Zhuo Li Weibang Lu Conghua Lu Yagang Yao School of Materials Science and Engineering Tianjin University Tianjin 300072 China Division of Advanced Nanomaterials Key Laboratory of Nanodevices and Applications Suzhou Institute of Nano-tech and Nano-bionics Chinese Academy of Sciences University of Chinese Academy of Sciences Suzhou 215123 China School of Materials Science and Engineering Georgia Institute of Technology 771 Ferst Drive Atlanta 30332 USA

Fiber-based supercapacitors （FSCs） are new members of the energy storage family. They present excellent flexibility and have promising applications in lightweight, flexible, and wearable devices. One of the existing challenges of FSCs is enhancing their energy density while retaining the flexibility. We developed a facile and cost-effective method to fabricate a highly capacitive positive electrode based on hierarchical ferric-cobalt-nickel ternary oxide nanowire arrays/graphene fibers and a negative electrode based on polyaniline-derived carbon nanorods/graphene fibers. The elegant microstructures and excellent electrochemical performances of both electrodes enabled us to construct a high- performance flexible asymmetric graphene fiber-based supercapacitor device with an operating voltage of 1.4 V, a specific capacitance up to 61.58 ***-2, and an energy density reaching 16.76 μW·h·cm-2. Moreover, the optimal device presents an outstanding cycling stability with 87.5% initial capacitance retention after 8,000 cycles, and an excellent flexibility with a capacitance retention of 90.9% after 4,000 cycles of repetitive bending.

关键词： fiber-based supercapacitors ferric-cobalt-nickel ternary oxide nanowire arrays polyaniline-derived carbon nanorods flexibility

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When thermoelectric materials come across with magnetism

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Rare Metals 2021年第4期40卷 752-766页

作者： Chen-Chen zhao Chong Xiao Hefei National Laboratory for Physical Sciences at the Microscale University of Science and Technology of ChinaHefei 230026China Institute of Energy Hefei Comprehensive National Science CenterHefei 230031China

Nowadays,thermoelectric materials have attracted a lot of attention as they can directly convert heat into electricity and vice ***,while strenuous efforts have been made,those conventional strategies are still inevitably going to meet their performance optimization *** this reason,brand new strategies are badly needed to achieve further ***,the roles played by magnetism in recent advances of thermoelectric optimization are ***,magnetic thermoelectric materials can just be treated like other normal materials because the use of universal optimization strategies can still get good ***,it is not a situation which is all or nothing and the tactics of using magnetism for thermoelectric optimization can coexist with other ***,through magnetic doping,we can introduce and adjust magnetism in materials for further *** provides more possibilities in thermoelectric optimization as it can directly influence the spin states in ***,in the form of magnetic secondphase nanoclusters,magnetism can be introduced to thermoelectric materials to conquer the dilemma that the solid solubility of many magnetic ions in thermoelectric materials is too low to have any significant effect on thermoelectric ***,when exposed to an external magnetic field,topological materials can rely on its unique band structures to optimize.

关键词： Thermoelectricity Magnetic thermoelectric materials Magnetism Magnetic doping Magnetic second phase

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Dynamic plugging regulating strategy of pipeline robot based on reinforcement learning

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Petroleum Science 2024年第1期21卷 597-608页

作者： Xing-Yuan Miao Hong zhao College of Mechanical and Transportation Engineering China University of PetroleumBeijing102249China

Pipeline isolation plugging robot (PIPR) is an important tool in pipeline maintenance operation. During the plugging process, the violent vibration will occur by the flow field, which can cause serious damage to the pipeline and PIPR. In this paper, we propose a dynamic regulating strategy to reduce the plugging-induced vibration by regulating the spoiler angle and plugging velocity. Firstly, the dynamic plugging simulation and experiment are performed to study the flow field changes during dynamic plugging. And the pressure difference is proposed to evaluate the degree of flow field vibration. Secondly, the mathematical models of pressure difference with plugging states and spoiler angles are established based on the extreme learning machine (ELM) optimized by improved sparrow search algorithm (ISSA). Finally, a modified Q-learning algorithm based on simulated annealing is applied to determine the optimal strategy for the spoiler angle and plugging velocity in real time. The results show that the proposed method can reduce the plugging-induced vibration by 19.9% and 32.7% on average, compared with single-regulating methods. This study can effectively ensure the stability of the plugging process.

关键词： Pipeline isolation plugging robot Plugging-induced vibration Dynamic regulating strategy Extreme learning machine Improved sparrow search algorithm Modified Q-learning algorithm

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Coordinated Multi-User Spectrum Sharing in Distributed Antenna-Based Cognitive Radio Systems

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China Communications 2016年第1期13卷 57-67页

作者： zhao juntao FENG Wei zhao Ming WANG Jing National Laboratory for Information Science and Technology Department of Electronic EngineeringTsinghua University

Spectrum sharing for efficient reuse of licensed spectrum is an important concept for cognitive radio *** a spectrum-sharing system(SSS),deploying the antennas in a distributed manner can offer a new spatial dimension for the efficient reuse of licensed frequency *** improve the whole performance of multiple secondary users(SUs),this paper addresses the problem of coordinated multi-SU spectrum sharing in a distributed antenna-based *** adopting the Hungarian method,the primal decomposition method and pricing policy,we propose a coordinated multi-user transmission scheme,so as to maximize the sum-rate of *** results show that the proposed method can significantly enhance the system performance,and the computational complexity is low.

关键词： cognitive radio distributed anten-na spectrum-sharing system antenna selec-tion power allocation

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A simulation-based nonlinear site amplification model for ground-motion prediction equations in Japan

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Earthquake Engineering and Engineering Vibration 2021年第4期20卷 843-862页

作者： Ruibin Hou John Xingquan zhao School of Civil Engineering Southwest Jiaotong UniversityChengdu 610031China Key Laboratory of Building Structural Retrofitting and Underground Space Engineering Ministry of EducationShandong Jianzhu UniversityJi′nan 250101China

In this manuscript we present a nonlinear site amplification model for ground-motion prediction equations(GMPEs)in Japan,using a site period-based site class and a site impedance ratio as site *** used a large number of shear-wave velocity profiles from the Kiban-Kyoshin network(KiK-net)and the Kyoshin network(K-NET)to construct the one-dimensional(1D)numerical *** strong-motion records from rock-sites in Japan with different earthquake categories and taken from the Pacific Earthquake Engineering Research Center dataset were used in this *** fit a set of 1D site amplification models using the spectral amplification ratios derived from 1D equivalent linear *** of site impedance ratios for both linear and nonlinear site response were included in the 1D *** 1D model could be implemented into GMPEs using a new proposed adjustment *** adjusted site amplification ratios retain the nonlinear characteristics of the 1D model for strong motions and match the linear amplification ratio in GMPE for weak *** nonlinearity of the present site model is reasonably similar to that of the historical models,and the present site model could satisfactorily capture the nonlinear site response in empirical data.

关键词： nonlinear site amplification model ground-motion prediction equations site class site impedance ratio site response analysis

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Frequency Domain Fatigue Evaluation on SCR Girth-Weld Based on Structural Stress

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China Ocean Engineering 2024年第2期38卷 255-270页

作者： ZHANG Long zhao Tian-feng College of Safety and Ocean Engineering China University of Petroleum(Beijing)Beijing 102249China

The Steel Catenary Riser(SCR)is a vital component for transporting oil and gas from the seabed to the floating *** harsh environmental conditions and complex platform motion make the SCR’s girth-weld prone to fatigue *** structural stress fatigue theory and Master S-N curve method provide accurate predictions for the fatigue damage on the welded joints,which demonstrate significant potential and compatibility in multi-axial and random fatigue ***,we propose a new frequency fatigue model subjected to welded joints of SCR under multiaxial stress,which fully integrates the mesh-insensitive structural stress and frequency domain random process and transforms the conventional welding fatigue technique of SCR into a spectrum analysis technique utilizing structural ***,a full-scale FE model of SCR with welds is established to obtain the modal structural stress of the girth weld and the frequency response function(FRF)of modal coordinate,and a biaxial fatigue evaluation about the girth weld of the SCR can be achieved by taking the effects of multi-load correlation and pipe-soil interaction into *** research results indicate that the frequency-domain fatigue results are aligned with the time-domain results,meeting the fatigue evaluation requirements of the SCR.

关键词： SCR girth weld random vibration self(cross)power spectrum structural stress method biaxial fatigue damage

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Drug delivery with Mn-doped MoO_(2) for photothermalenhanced chemotherapy in fighting cancers

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Rare Metals 2024年第5期43卷 2230-2240页

作者： Ping zhao Hai-Fa Zheng Ju Peng Xing-Long Li Fazal Raziq Xiao-jun Liu Hao-Quan Yu Jin-Lu Tang Yi-Fan Kang Wen-Huan Huang School of Chemistry and Chemical Engineering Guangdong Pharmaceutical UniversityGuangzhou 510006China KAUST Catalysis Center King Abdullah University of Science and Technology23955-6900 ThuwalKingdom of Saudi Arabia Key Laboratory of Chemical Additives for China National Light Industry College of Chemistry and Chemical EngineeringShaanxi University of Science and TechnologyXi'an 710021China

Although chemotherapy has been intensively applied in cancer treatments,its inadequate therapeutic efficacy and severe side effects are still under constant *** used as anti-tumor drug delivery system(DDS)have attracted tremendous attentions owing to their various intriguing ***,Mn-doped MoO_(2)nanoparticles coated with ZrO_(2)and capped with Bi_(2)O_(3)have been designed as a DDS,namely *** possesses good magnetic properties,great photothermal conversion ability,sensitive tumor microenvironment(TME)responsiveness,and good biocompatibility in hemocompatibility in ***,MMZB has been utilized to load the chemotherapeutic agent daunomycin(DNM)(MMZB@DNM)for chemo-photothermal combined ***@DNM demonstrates a more impressive anti-cancer effect than the individual photothermal or chemotherapy both in vitro and in ***,the analysis of tumor specimen sections and serum levels after the treatment indicates negligible side effects for MMZB@DNM in *** contribution provides a valuable concept in designing therapeutic agents for achieving significantly enhanced tumor treatments,which benefits from the synergistic combination of chemotherapy and photothermal therapy in one single nanoagent.

关键词： Mn-doped MoO_(2) Bi_(2)O_(3) Nanocarrier Photothermal Chemotherapy

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Pharmacokinetics of acteoside following single dose intragastric and intravenous administrations in dogs

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Chinese Journal of Natural Medicines 2015年第8期13卷 634-640页

作者： ZHANG Wei HUO Shi-Xia WEN Yan-Li XING Han ZHANG Qing LI ning zhao Di SUN Xiao-Lin XU Jie YAN Ming CHEN Xi-Jing Center of Metabolism and Pharmacokinetics China Pharmaceutical University Institute of Xinjiang Traditional Uyghur Medicine

Acteoside(verbascoside), a phenylethanoid glycoside widely distributed in various plants, has been shown to have potential activity against Alzheimer's disease, attracting great attentions recently. The present study was designed to develop a selective and sensitive LC-MS/MS method for the determination of acteoside in biological samples and carry our a phamacokinetic(PK) study in beagle dogs. The PK parameters were calculated using non-compartmental models. Following a single-dose oral administration, acteoside was rapidly absorbed and eliminated, with Tmax being between 30 to 45 min and terminal half-life being about 90 min. The areas under the time-concentration curve(AUC) were 47.28 ± 8.74, 87.86 ± 13.33, and 183.14 ± 28.69 mg·min·L-1 for oral administration of 10, 20, and 40 mg·kg-1, respectively, demonstrating that the exposure of acteoside proportionally increased with the dose level. The absolute bioavailability of acteoside was around 4%. For all the PK parameters, there were large variations between individual dogs. In conclusion, the pharmacokinetic characteristics observed in the present study can be of great value to help better understand the pharmacological properties of acteoside and to improve the outcome of its clinical use.

关键词： Acteoside LC—MS/MS Beagle dog Bioavailability

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A rapid approach for isolating a single fungal spore from rice blast diseased leaves

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Journal of Integrative Agriculture 2019年第6期18卷 1415-1418页

作者： FEI Li-wang LU Wen-bo XU Xiao-zhou YAN Feng-cheng ZHANG Li-wei LIU Jin-tao BAI Yuan-jun LI Zhen-yu zhao Wen-sheng YANG jun PENG You-liang Key Laboratory of Pest Monitoring and Green Management Ministry of Agriculture and Rural Affairs/College of Plant ProtectionChina Agricultural UniversityBeijing 100193P.R.China Institute of Plant Protection Liaoning Academy of Agricultural SciencesShengyang 110161P.R.China Saline-Alkali Land Utilization and Research Institute Liaoning Academy of Agricultural SciencesPanjin 124010P.R.China

Single spore isolation is a fundamental approach in plant pathology and mycology to isolate and identify plant fungal pathogens from diseased ***,routine single spore isolation procedure is time-consuming and has a high risk of contamination by other *** this study,we developed a rapid approach for isolating a single spore of the fungal pathogen,Pyricularia oryzae,from rice blast diseased leaves in the paddy field with low potential of ***,rice blast leaves with single lesions were selected in the paddy field,and a single lesion was cut out and pressed and dragged gently across the surface of water ***,a germinated single spore with a barely visible piece of agar was cut out of water agar with a dissecting needle under a stereomicroscope at approximately 120-fold ***,the germinated single spore with water agar was transferred onto oatmeal tomato agar for growth and *** on our experience,a skilled technician or student can successfully isolate single spore from over 150 independent diseased samples with nearly no contaminations in a single working *** approach is also suitable for isolating single spore from other fungal disease samples that produce abundant aerial conidia.

关键词： Pyricularia oryzae single spore isolation rice blast field experiment

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Protective effects of paeoniflorin and albiflorin on chemotherapy-induced myelosuppression in mice

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Chinese Journal of Natural Medicines 2016年第8期14卷 599-606页

作者： ZHU Ying-Li WANG Lin-Yuan WANG Jing-Xia WANG Chun WANG Cheng-Long zhao Dan-Ping WANG Zi-Chen ZHANG Jian-jun School of Preclinical Medicine Beijing University of Chinese Medicine School of Chinese Materia Medica Beijing University of Chinese Medicine

Paeonia lactiflora root(baishao in Chinese) is a commonly used herb in traditional Chinese medicines(TCM). Two isomers, paeoniflorin(PF) and albiflorin(AF), are isolated from P. lactiflora. The present study aimed to investigate the protective effects of PF and AF on myelosuppression induced by chemotherapy in mice and to explore the underlying mechanisms. The mouse myelosuppression model was established by intraperitoneal(i.p.) injection of cyclophosphamide(CP, 200 mg×kg^(–1)). The blood cell counts were performed. The thymus index and spleen index were also determined and bone morrow histological examination was performed. The levels of tumor necrosis factor-α(TNF-α) in serum and colony-stimulating factor(G-CSF) in plasma were measured by Enzyme-Linked Immunosorbent Assays(ELISA) and the serum levels of interleukin-3(IL-3), granulocyte-macrophagecolony- stimulatingfactor(GM-CSF), and interleukin-6(IL-6) were measured by radioimmunoassay(RIA). The levels of m RNA expression protein of IL-3, GM-CSF and G-CSF in spleen and bone marrow cells were determined respectively. PF and AF significantly increased the white blood cell(WBC) counts and reversed the atrophy of thymus. They also increased the serum levels of GM-CSF and IL-3 and the plasma level of G-CSF and reduced the level of TNF-α in serum.. PF enhanced the m RNA level of IL-3 and AF enhanced the m RNA levels of GM-CSF and G-CSF in the spleen. PF and AF both increased the protein levels of GM-CSF and G-CSF in bone marrow cells. In conclusion, our results demonstrated that PF and AF promoted the recovery of bone marrow hemopoietic function in the mouse myelosuppression model.

关键词： Albiflorin Paeoniflorin Chemotherapy Myelosuppression

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