21,507 Hits in 2.7 sec

Flexible triboelectric generator

Feng-Ru Fan, Zhong-Qun Tian, Zhong Lin Wang
2012 Nano Energy  
Fan, et al., Flexible triboelectric generator, Nano Energy (2012), doi:10.1016/j.nanoen.2012.01.004  ...  Zhong-Qun Tian received his B.S. degree in Chemistry from Xiamen University, China in 1982.  ... 
doi:10.1016/j.nanoen.2012.01.004 fatcat:okzbqgdtnfbpdiajia6dxshmr4

Three-Dimensional Reconstruction of Erythrocyte in the Capillary [article]

Yifang Fan, Yubo Fan, Zhiyu Li, Wentao Lin, Yuan Wei, Xing Zhong, Tony Newman, Changsheng Lv, Yuzhou Fan
2013 arXiv   pre-print
The dynamic analysis of erythrocyte deformability is used as an important means for early diagnosis of blood diseases and blood rheology. Yet no effective method is available in terms of three-dimensional reconstruction of erythrocytes in a capillary. In this study, ultrathin serial sections of skeletal muscle tissue are obtained from the ultramicrotome, the tomographic images of an erythrocyte in a capillary are captured by the transmission electron microscope, and then a method to position
more » ... restore is devised to demonstrate the physiological relationship between two adjacent tomographic images of an erythrocyte. Both the modeling and the physical verification reveal that this method is effective, which means that it can be used to make three-dimensional reconstruction of an erythrocyte in a capillary. An example of reconstructed deformation of erythrocyte based on the serial ultrathin sections is shown at the end of this paper.
arXiv:1306.5789v1 fatcat:b6fnl2tjufdrbl7w2souz3p6yq

On holographic braneworld cosmology [article]

Zhong-Ying Fan
2021 arXiv   pre-print
Fan was supported in part by the National Natural Science Foundations of China with Grant No. 11805041 and No. 11873025.  ... 
arXiv:2106.14376v2 fatcat:mllazyysezcwxpk3qc4dpxfe3e

Products of k atoms in Krull monoids [article]

Yushuang Fan, Qinghai Zhong
2015 arXiv   pre-print
Let H be a Krull monoid with finite class group G such that every class contains a prime divisor. For k∈ N, let U_k(H) denote the set of all m∈ N with the following property: There exist atoms u_1, ..., u_k, v_1, ... , v_m∈ H such that u_1·...· u_k=v_1·...· v_m. It is well-known that the sets U_k (H) are finite intervals whose maxima ρ_k(H)= U_k(H) depend only on G. If |G|< 2, then ρ_k (H) = k for every k ∈ N. Suppose that |G| > 3. An elementary counting argument shows that ρ_2k(H)=k D(G) and k
more » ... D(G)+1<ρ_2k+1(H)< k D(G)+ D(G)/2 where D(G) is the Davenport constant. In Ga-Ge09b it was proved that for cyclic groups we have k D(G)+1 = ρ_2k+1(H) for every k ∈ N. In the present paper we show that (under a mild condition on the Davenport constant) for every noncyclic group there exists a k^*∈ N such that ρ_2k+1(H)= k D(G)+ D(G)/2 for every k> k^*. This confirms a conjecture of A. Geroldinger, D. Grynkiewicz, and P. Yuan in Ge-Gr-Yu15.
arXiv:1508.03500v1 fatcat:nidvjvxfu5cj3a45llyzgeiruu

Is an imaginary fixed point physical or unphysical? [article]

Fan Zhong
2012 arXiv   pre-print
It has been proposed that a first-order phase transition driven to happen in the metastable region exhibits scaling and universality near an instability point controlled by an instability fixed point of a φ^3 theory. However, this fixed point has an imaginary value and the renormalization-group flow of the φ^3 coupling diverges at a finite scale. Here combining a momentum-space RG analysis and a nucleation theory near the spinodal point, we show that imaginary rather than real values are
more » ... l counter-intuitively and thus the imaginary fixed point does control the scaling.
arXiv:1205.1571v1 fatcat:hfiy6bmn7bg2xkagrjdaa2w4va

Shell-isolated nanoparticle-enhanced Raman spectroscopy

Jian Feng Li, Yi Fan Huang, Yong Ding, Zhi Lin Yang, Song Bo Li, Xiao Shun Zhou, Feng Ru Fan, Wei Zhang, Zhi You Zhou, De Yin Wu, Bin Ren, Zhong Lin Wang (+1 others)
2010 Nature  
We first synthesized Au NPs with a diameter of about 55 nm as cores by a standard sodium citrate reduction method. 1 A freshly prepared aqueous solution of 1 mM (3-Aminopropyl) trimethoxysilane (APS) was added to the gold sol under vigorous magnetic stirring in 15 min, ensuring complete complexation of the amine groups with the gold surface. Then a 0.54 wt% sodium silicate solution was added to the sol, again under vigorous magnetic stirring. To accelerate the synthesis procedure and make the
more » ... tra-thin silica shell, we elevated the reaction temperature from room temperature to 90 qC, so that the original coating time of 2-3 days 2 for coating silica shells of 4-5 nm can be shortened to ca. one hour. More importantly, this method ensures to form the ultra-thin shell thickness of only 2-4 nm that is free of pinholes (see S8) by carefully controlling parameters such as reaction time, temperature, pH, and the concentration. 2-7 S1.2. Preparation of Au@Al 2 O 3 core-shell NPs The Au@Al 2 O 3 core-shell NPs were prepared mainly by atomic layer deposition (ALD) technique 8 . Firstly, the cleaned and concentrated 55 nm Au NPs were spread over a cleaned glass. Then the ALD was performed in a Savannah 100 Atomic Layer Deposition system manufactured by Cambridge NanoTech Inc. During the deposition, the thickness of the Al 2 O 3 layer could be controlled very well by varying the number of cycles of deposition, where the growth rate was 0.1 nm per cycle. With such a high precision of control, the Al 2 O 3 layer covers the entire Au NPs uniformly. S1.3. Methods for characterizing the core-shell nanoparticles The structure and surface morphology of the core-shell nanoparticles and the shell thicknesses were measured by high-resolution transmission electron microscopy (HRTEM) (JEM 4000EX and Tecnai F30). Extinction spectra of 55 nm Au@SiO 2 sol with different silica shell thickness from 1 to 12 nm were recorded on a Shimadzu UV-2100 spectrometer using a 1-cm quartz cell. After several rounds of cleaning and concentrating by centrifugation, Au@SiO 2 NPs were spread onto the samples. The electrochemical measurements were conducted in a conventional three-compartment glass cell on a CHI 631B electrochemical workstation (CH Instruments, Shanghai, China). Raman spectra were recorded on a LabRam I confocal microprobe Raman system (Jobin-Yvon, France) in a homemade spectroelectrochemical cell. The excitation line was 632.8 nm from a He-Ne laser. The portable Raman spectrometer (Inspetor, DeltaNu, USA) and the excitation line of 785 nm were used. S1.4. Extinction spectra of Au@SiO 2 NPs The extinction spectral features of 55 nm Au@SiO 2 sol with different silica shell thicknesses from 1 to 12 nm shown in Fig. S1a are quite similar to that of 55 nm Au NPs with a slight shift to the red, doi: 10.1038/nature08907 SUPPLEMENTARY INFORMATION 2 indicating the effect of the shell on the localized surface plasmon resonances (LSPR) is negligible. It should be noted that, in the SHINERS experiments, the particles are spread as a monolayer over the substrate, the coupling effect between the nanoparticles themselves or between the particle and the substrate can lead to a significant red-shift of the LSPR peak. We have performed a calculation based on the generalized Mie theory. Because of the limitation of the calculation time, we have to use a large Au NP (d = 200 nm) to simulate the much larger surface. As shown in Fig. S1b that the corresponding peak is shifted from 540 nm to about 615 nm. Therefore, it is suitable to use the excitation line of 633 nm in the present study. Figure S1 | The experimental and calculated extinction spectra. a, Extinction spectra of 55 nm Au@SiO 2 NPs with different silica shell thicknesses from about 1 nm, 2 nm, 4 nm up to 12 nm in comparison with that of bare 55 nm Au NPs. b, The Mie theory calculated extinction, absorption and scattering cross section of 55 nm Au@4 nm SiO 2 NP contacting to Au NP of 200 nm in diameter. S2. A previous strategy of using core-shell nanoparticles for extending the substrate generality for SERS
doi:10.1038/nature08907 pmid:20237566 fatcat:itanrzenxzfohpkdmtfdy5n22a

Performance of a novel vertical-flow settler: a comparative study

Zhong-guo ZHANG, Zhao-yang CHEN, Yan-zhong LI, Jing-hua FAN, Bin FAN, Zhao-kun LUAN, Dao-qiang LU
2006 Journal of Environmental Sciences(China)  
ZHANG Zhong-guo el ~d . Vol. I8  ...  I00 mg/L; c. 50 mdL) coagulated by PAC1 at different up-flow rates 7'-(20*2)T; initial pH-7.5tO.l; PAC1 dosages: a. 0.62 mg/L, b. 0.03 mdL, and c. 0.02 mg/L as Al Vol. 18 ZHANG Zhong-guo et 01. -~~~  ... 
doi:10.1016/s1001-0742(06)60005-3 pmid:17278738 fatcat:3soizmf2czbwbbd3ti2hzrfls4

A Cosmic Microscope for the Preheating Era [article]

JiJi Fan, Zhong-Zhi Xianyu
2020 arXiv   pre-print
A Cosmic Microscope for the Preheating Era JiJi Fana∗ and Zhong-Zhi  ...  Fan, K. D. Lozanov, and M. Reece, “Cosmological dynamics of Higgs potential fine tuning,” Phys. Rev. D99 no. 3, (2019) 035008, arXiv:1802.00444 [hep-ph]. [34] T. Suyama and S.  ... 
arXiv:2005.12278v1 fatcat:nloez5r63ncollnn4skalfuuna

Static and Dynamic Charged Black Holes [article]

Hyat Huang, Zhong-Ying Fan, H. Lü
2019 arXiv   pre-print
We consider a class of Einstein-Maxwell-dilaton theories in general dimensions and construct both static and dynamic charged black holes. We adopt the reverse engineering procedure and make a specific ansatz for the scalar field and then derive the necessary scalar potential and the non-minimal coupling function between the scalar and the Maxwell field. The resulting static black holes contain mass and electric charge as integration constants. We find that some of the static solutions can be
more » ... moted to become dynamical ones in the Eddington-Finkelstein-like coordinates. The collapse solutions describe the evolution from a smaller charged black hole to a larger black hole state, driven by the scalar field.
arXiv:1908.07970v1 fatcat:cvmnm22airhb5jwlkekicopxq4

The Grinding Influence On The Strength Of Fan-Out Wafer-Level Packages

Z. W. Zhong, C. Xu, W. K. Choi
2018 Zenodo  
To build a thin fan-out wafer-level package, the package had to be ground to a thin level.  ...  In this work, the influence of the grinding processes on the strength of the fan-out wafer-level packages was investigated.  ...  Zhong, C. Xu, W. K.  ... 
doi:10.5281/zenodo.1316231 fatcat:ylvvw2mn5bfvleuk5zrgy662oi

Distributed Demand Response and User Adaptation in Smart Grids [article]

Zhong Fan
2010 arXiv   pre-print
This paper proposes a distributed framework for demand response and user adaptation in smart grid networks. In particular, we borrow the concept of congestion pricing in Internet traffic control and show that pricing information is very useful to regulate user demand and hence balance network load. User preference is modeled as a willingness to pay parameter which can be seen as an indicator of differential quality of service. Both analysis and simulation results are presented to demonstrate
more » ... dynamics and convergence behavior of the algorithm.
arXiv:1007.5425v1 fatcat:wsymnfl7uvda3nr3j6u746fn7u

Robust Covariance Estimation for Approximate Factor Models [article]

Jianqing Fan, Weichen Wang, Yiqiao Zhong
2016 arXiv   pre-print
., 2010; Lam and Fan, 2009; Ravikumar et al., 2011) and factor model analysis (Stock and Watson, 2002; Bai, 2003; Fan et al., 2008 Fan et al., , 2013 Fan et al., , 2014 Onatski, 2012) .  ...  Recently, motivated by Fama-French model (Fama and French, 1993) from financial econometrics, Fan et al. (2008) and Fan et al. (2013) considered the covariance structure of the static approximate  ... 
arXiv:1602.00719v1 fatcat:l444gb5davbmjnbb4tki6rhvey

Rotationally symmetric harmonic diffeomorphisms between surfaces [article]

Li Chen, Shi-Zhong Du, Xu-Qian Fan
2013 arXiv   pre-print
In this paper, we show that the nonexistence of rotationally symmetric harmonic diffeomorphism between the unit disk without the origin and a punctured disc with hyperbolic metric on the target.
arXiv:1305.3793v1 fatcat:wvf4alle45gadatnhuwgt5hwoi

Dr. Yang Zhong: An explorer on the road forever

Fan Chen, Bao-Rong Lu, James C. Crabbe, Jia-yuan Zhao, Bo-jian Zhong, Yu-peng Geng, Yu-fang Zheng, Hong-yan Wang
2017 Protein & Cell  
Professor Yang Zhong (Fig. 1) , a famous botanist and the Dean of Fudan University's graduate school, passed away in a tragic car accident while on a business trip.  ...  et al., 1996 (Zhong et al., , 1997 .  ...  Yang Zhong completed a series of studies on plant phylogenetics.  ... 
doi:10.1007/s13238-017-0496-1 pmid:29256009 pmcid:PMC5818370 fatcat:a5izqcme7zellpbfdgmojcc3fu

Breeding Behaviors of Blue Tailed Bee-eater of Nujiang Valley

Zhong-rong WU, Lian-xian HAN, Zhong-fan KUANG
2009 Zoological Research  
摘要:2007 年 3 月 26 日-7 月 16 日,采用典型野外记录法和所有事件取样法对云南省保山市道街怒江河谷 栗喉蜂虎繁殖行为进行了观察。结果表明:1)产卵期雄性栗喉蜂虎求偶喂食的食物以蜻蜓目和膜翅目昆虫为主, 占 83.56%;雌鸟接受喂食的可能性为 96.83%,接受喂食后仅有 17.49%的雌鸟与雄鸟进行交配。2)在孵卵期昼 间,雄鸟每次坐巢的时间为(23.5±21.6)min,每日坐巢的时间占 54.4%;雌鸟每次坐巢的时间为(25.8±11.5) min,每日坐巢的时间占 42.1%,雌雄鸟每次坐巢的时间无明显差异。3)幼雏出壳后亲鸟对幼雏的暖雏时间逐日 减少,至第 20 d 亲鸟不再暖雏。栗喉蜂虎的育雏期为 29~33 d,在繁殖过程中帮助喂食的鸟确实能提高被助鸟的 繁殖成功率。 关键词:栗喉蜂虎;繁殖行为;怒江河谷 中图分类号:Q959.737; Q959.737.08 文献标识码:A Abstract: By the method of ad libitum sampling and all-occurrence recording, breeding
more » ... viors of Blue Tailed Bee-eater in the Agricultural Region of Nujiang Valley were observed from 26th March to 17th July, 2007. The result showed the most common foods that male birds fed to female birds are Odonata and Hymenoptera insects, accounting for 83.56%. The frequency of females accepting the food provided by males was 96.83%, and the frequency of copulation was 17.49% following food acceptance. During the daytime of the incubation period, comparison of time on nest between male and female showed no significant difference. Male mean on nest time was (23.5±21.6)min and female (25.8±11.5)min. Once hatched, a decrease in time spent warming the young was seen until the 20th day where the parents bird ceased warming. The nursing period of Blue Tailed Bee-eater was found to be 29 -33 days, with the presence of a helper significantly improving the success rate of reproduction.
doi:10.3724/sp.j.1141.2009.04429 fatcat:7s45p5ta4bcy5aqua6rkflmtuy
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