Author
Xu Feifei
Bio: Xu Feifei is an academic researcher from Hefei University of Technology. The author has contributed to research in topics: Time domain & Equilibrium constant. The author has an hindex of 1, co-authored 1 publications receiving 354 citations.
Papers
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TL;DR: In this paper, the adsorption of methyl orange onto multiwalled carbon nanotubes (MWCNTs) from aqueous solutions was studied, in which the influence of contact time, dosage, temperature, pH, and methyl orange concentration in the solution were investigated.
422 citations
TL;DR: In this paper , the authors discuss the effect of different types of labels on the quality of the labels used by the users. But they do not discuss the impact of different labels on their performance.
Abstract: 稳定精度作为光电吊舱的关键性能指标之一，开展瞄准线稳定精度测试方法研究对于光电吊舱测试与验收具有重要意义。结合粗精组合稳定光电系统，提出一种基于时/频域分析的稳定精度测试方法。通过采集随机振动环境下惯性速率传感器和光学补偿元件的角位置信号，基于信号时域分析，得到图像漂移角速率、抖动及概率分布情况；基于信号频域分析，得到瞄准线角位置信号的功率谱密度。提出频段稳定精度贡献度，用于评估不同频段对稳定精度的影响程度；采用二级稳定效能提升度，评价二级稳定在不同频段对系统稳定性能的提升程度。该方法可以直观展示图像抖动及概率分布情况，同时给出影响瞄准线稳定精度的频率要素，对于指导机电系统设计具有重要的工程应用价值。
TL;DR: In this paper , the authors conducted a multicentric cross-sectional survey involving adult atopic dermatitis (AD) patients and found a significant correlation between disease duration and total costs (r = 0.163 p=0.017).
TL;DR: In this paper , a fast steering mirror is used to adjust the speed of the steering mirror in a car. ǫ 0.25 Hz～50 Hz, i.e.
Abstract: 柔性铰链作为快速反射镜（fast steering mirror，FSM）的关键部件之一，分析其结构特性对FSM性能的影响，用于指导FSM结构设计。通过将柔性铰链简化为弹性环节，等效为3轴的平动刚度和3轴的转动刚度，基于欧拉动力学，建立了两轴FSM的运动微分方程，搭建了FSM控制系统的Simulink仿真模型；在给定振动环境下，仿真分析了结构谐振频率对FSM性能的影响，指出平动固有频率越大，FSM锁零精度越高，平动固有频率选择在伺服系统增益交界频率2倍以上；考虑到锁零精度要求和电机力矩限制，转动固有频率选择在25 Hz～50 Hz。最后结合实物进行了振动试验，仿真结果与振动试验结果一致，验证了仿真模型的正确性。
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TL;DR: It is evident from the literature that CNT based nanosorbents have shown good potential for the removal of dyes from aqueous solution, however, still more research work should be focused on the development of cost effective, higher efficient and environmental friendly CNTbased nanOSorbents for their commercial applications.
1,028 citations
TL;DR: In this article, various nanomaterials have been reviewed which have been used for water decontamination and a review has been given on adsorption, photocatalytic and antibacterial activity of nanommaterials.
910 citations
TL;DR: In this review, the key advancement on the preparation and modification of novel adsorbents and their adsorption capacities for dyes removal under various conditions have been highlighted and discussed.
694 citations
TL;DR: Experimental results indicated that CNTs-A have excellent adsorption capacity for methyl orange and methylene blue, and Kinetic regression results shown that the adsorbent kinetic was more accurately represented by a pseudo second-order model than Langmuir isotherm model.
Abstract: An alkali-acitvated method was explored to synthesize activated carbon nanotubes (CNTs-A) with a high specific surface area (SSA), and a large number of mesopores. The resulting CNTs-A were used as an adsorbent material for removal of anionic and cationic dyes in aqueous solutions. Experimental results indicated that CNTs-A have excellent adsorption capacity for methyl orange (149 mg/g) and methylene blue (399 mg/g). Alkali-activation treatment of CNTs increased the SSA and pore volume (PV), and introduced oxygen-containing functional groups on the surface of CNTs-A, which would be beneficial to improving the adsorption affinity of CNTs-A for removal of dyes. Kinetic regression results shown that the adsorption kinetic was more accurately represented by a pseudo second-order model. The overall adsorption process was jointly controlled by external mass transfer and intra-particle diffusion, and intra-particle diffusion played a dominant role. Freundlich isotherm model showed a better fit with adsorption da...
617 citations
TL;DR: In this paper, the synthesis of magnetic Fe3O4@graphene composite (FGC) and utilization in dye removal from aqueous media were investigated by the structural, surface, and magnetic characteristics of the nanosized composite.
528 citations