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| 1 | Experimental study of mode distortion induced by stimulated Raman scattering in high-power fiber amplifiers显示文摘The experimental investigation of mode distortion induced by stimulated Raman scattering(SRS)in a high-power fiber amplifier,which includes the evolutions of optical spectra,spatial beam profiles,and time-frequency characteristics,has been carried out in detail.Temporal-frequency characteristics have been studied for the first time,to the best of our knowledge,by using a low-speed camera and high-speed photodiode traces,which revealed that temporal-frequency characteristics of SRS-induced mode distortion are different from traditional dynamic mode instability(MI).The experimental results show that the output beam profile remains stable before the mode distortion occurs and fluctuates obviously after the onset of SRS-induced MI but on a time scale of seconds,which is much lower than that of Yb-gain-induced MI featuring millisecond-level beam profile fluctuation.It also shows that the mode distortion became measurable in company with the onset of inter-mode four-wave mixing(IM-FWM)when the ratio of Raman light reaches 3%;further,the beam quality factor M2degrades gradually from 1.4 to 2.1 as the ratio of Raman light increases.The mode distortion is accompanied by an obvious temperature increase of the output passive fiber,which further confirms that the mode distortion originates from SRS.The cause of the mode distortion induced by SRS has been explained in the context of core-pumped SRS effect,and the investigation on the accompanying IM-FWM effect indicates that the main content of the SRSinduced high-order mode is the LP21 mode. | QIUHUI CHU QIANG SHU ZENG CHEN FENGYUN LI DONGLIN YAN CHAO GUO HONGHUAN LIN JIANJUN WANG FENG JING CHUANXIANG TANG RUMAO TAO | 2020 | Photonics Research2020，8，4： | 6 |
| 2 | Inductive heat property of Fe_3O_4 nanoparticles in AC magnetic field for local hyperthermia显示文摘Magnetite (Fe3O4) nanoparticles with different magnetic properties were prepared by coprecipitation of Fe3+ and Fe2+ with aqueous NaOH solution. The inductive heat properties of Fe3O4 nanoparticles in an alternating current (AC) magnetic field were investigated for local hyperthermia. The maximum saturation magnetization Ms of Fe3O4 nanoparticles is 65.53 emu·g-1 under the optimum conditions of Fe3+: Fe2+ molar ratio at 1.8:1. The Ms of Fe3O4 nanoparticles decreased as the Fe3+/Fe2+ molar ratio increased. But the coercivity Hc increases with the increasing of Fe3+/Fe2+ molar ratio. Exposed in the AC magnetic field for 29 min, the temperatures of physiological saline suspension containing Fe3O4 nanoparticles were 42-97.5 ℃. The inductive heat property of Fe3O4 nanoparticles in AC magnetic field decreases as Hc increases, but increases with the increasing of Ms. The Fe3O4 nanoparticles would be useful as good thermoseeds for localized hyperthermia treatment of cancers. | ZHAO Donglin ZENG Xianwei XIA Qisheng TANG Jintian | 2006 | Rare Metals2006，25，z1： | 5 |
| 3 | 个体化动态治疗方案和多重方案随机序贯试验在精神卫生研究中的应用(英文)显示文摘动态治疗方案(Dynamic treatment regimens,DTRs)是一种序贯决策规则,是根据每个患者随时间变化而变化的特征和先前观察到的中间结果而量身定制的临床决策。精神障碍具有慢性和复杂性的特点,精神障碍患者具有异质性特点。这就要求随时间推移,根据个体对治疗反应的不同而分析出最佳的治疗方案,并动态地应用到患者之后的治疗中。多重方案随机序贯试验(Sequential Multiple Assignment Randomized Trial,SMARTs)的设计可以估计DTRs的治疗效应。SMARTs收集到大量的个体化变量和中间结果,在此基础上应用已有的现代统计工具可以优化DTRs。这些统计方法也可为今后的SMARTs研究设计推荐量身定制的变量。本文通过两个精神卫生研究案例介绍了DTRs和SMARTs,讨论了从SMARTs数据估算出最佳DTR的两种不同的计算机自动分析方法,并使用模拟数据演示这两种统计方法的性能。 | Ying LIU Donglin ZENG Yuanjia WANG | 2014 | 上海精神医学2014，26，6： | 4 |
| 4 | Improved spectrum reconstruction technique based on chirp rate modulation in stepped-frequency SAR显示文摘To improve the efficiencies of the traditional spectrum reconstruction techniques, an improved spectrum reconstruction technique(ISRT) based on chirp rate modulation(CRM) is proposed. With the help of a CRM operation, a reconstructed wideband signal with a narrow pulse width can be obtained. Compared with the traditional time domain spectrum reconstruction technique(TSRT), ISRT is less time-consuming since much less samples are needed. Compared with the traditional frequency domain spectrum reconstruction technique(FSRT), the reconstructed signal is a chirp signal, which has no limitation on the subsequent imaging algorithm.What is more, processing steps of ISRT are optimized, and the computational burden is less than that of TSRT and FSRT. Both simulation results and real data processing have verified the validity of ISRT. | GAO WenBin DING ZeGang ZHU DongLin ZENG Tao LONG Teng | 2015 | Science China(Information Sciences)2015，58，10： | 2 |
| 5 | Quantitative trait analysis in sequencing studies under trait-dependent sampling显示文摘 | Dan-Yu Lin Donglin Zeng Zheng-Zheng Tang | 2013 | Proceedings of the National Academy of Sciences2013，，： | 1 |
| 6 | Maximum Likelihood Estimation for the Proportional Odds Model with Random Effects显示文摘 | Zeng Donglin Lin D Y Yin Guosheng | 2005 | JASA2005，100，6： | 1 |
| 7 | Fabrication and electrical properties of lead ziroconate titanate thick films using new Sol-Gel processing显示文摘 | Xia Donglin Liu Meidong Zeng Yike | 2001 | J Mat Sci2001，12，： | 1 |
| 8 | Structural inference in transition measurement error models for longitudinal data 显示文摘 | PAN Wenqin LIN Xihong ZENG Donglin | 2006 | Biometrics2006，62，： | 1 |
| 9 | Fabrication and electrical properties of lead ziroconate titanate thick films by the new Sol- Gel method显示文摘 | Xia Donglin Liu Meidong Zeng Yike | 2001 | Materials Science and Engineerings2001，87，： | 1 |
| 10 | A semiparametric additive rates model for recurrent event data显示文摘 | Douglas E. Schaubel Donglin Zeng Jianwen Cai | 2006 | Lifetime Data Analysis2006，，4： | 1 |
| 11 | Ether-/Ester-/Fluorine-Rich Binding Emulsion Formula for Lithium-Ion Batteries显示文摘Practical application of a Si anode in a high-energy-density battery cannot be achieved due to the huge volume expansion of these anodes.Researchers have focused on binders of the anode to restrict volume expansion in order to address this issue,as the hydrogen bonds and mechanical properties of binders can be used to enhance adhesion and accommodate the volume changes of a Si anode.Herein,we comprehensively consider binders’hydrogen bonds,mechanical properties,stability,and compatibility with the electrolyte solution,and design an ether-/ester-/fluorine-rich composite polymer,named P(TFEMAco-IBVE).The proposed binder formula possesses outstanding stability,adhesion,and mechanical strength;moreover,it can accommodate the dramatic volume changes of a Si electrode and exhibits excellent electrochemical performance,achieving a high areal capacity of about 5.4 mA·h·cm^(-2).This novel polymer design may be applied to other electrode materials in the next generation of lithium-ion batteries. | Xianqing Zeng Donglin Han Zeheng Li Hongxun Wang Gu Wu Yong Deng Kai Liu Li Xie Chengdu Liang Min Ling Yuchuan Huang | 2022 | Engineering2022，，12： | 0 |
| 12 | Kinetic-boosted CO_(2) electroreduction to formate via synergistic electric-thermal field on hierarchical bismuth with amorphous layer显示文摘Electrocatalytic converting CO_(2) into chemical products has emerged as a promising approach to achieving carbon neutrality.Herein,we report a bismuth-based catalyst with high curvature terminal and amorphous layer which fabricated via two-step electrodeposition achieves stable formate output in a wide voltage window of 600 mV.The Faraday efficiency(FE) of formate reached up to 99.4% at-0.8 V vs.RHE and it remained constant for more than 92 h at-15 mA cm^(-2).More intriguingly,FE formate of95.4% can be realized at a current density of industrial grade(-667.7 mA cm^(-2)) in flow cell.The special structure promoted CO_(2) adsorption and reduced its activation energy and enhanced the electric-thermal field and K^(+) enrichment which accelerated the reaction kinetics.In situ spectroscopy and theoretical calculation further confirmed that the introduction of amorphous structure is beneficial to adsorpting CO_(2)and stabling*OCHO intermediate.This work provides special insights to fabricate efficient electrocatalysts by means of structural and crystal engineering and makes efforts to realize the industrialization of bismuth-based catalysts. | Bing Yang Junyi Zeng Zhenlin Zhang Lin Meng Donglin Shi Liang Chen Youju Huang | 2024 | Journal of Energy Chemistry2024，90，3： | 0 |
| 13 | On the Local and Stratified Likelihood Approaches in Single-Index Hazards Model显示文摘We propose the single-index hazards model for censored survival data.As an extension of the Cox model and many transformation models,this model allows nonparametric modeling of covariate effects in a parsimonious way via a single index.In addition,the relative importance of covariates can be assessed via this model.We consider two commonly used profile likelihood methods for parameter estimation:the local profile likelihood method and the stratified profile likelihood method.It is shown that both methods may give consistent estimators under certain restrictive conditions,but in general they can yield biased estimation.Simulation studies are also conducted to demonstrate these bias phenomena.The existence and nature of the failures of these two commonly used approaches is somewhat surprising. | Kai Ding Michael R.Kosorok Donglin Zeng | 2013 | Communications in Mathematics and Statistics2013，1，2： | 0 |
| 14 | Multicategory Classification Via Forward-Backward Support Vector Machine显示文摘In this paper,we propose a new algorithm to extend support vector machine(SVM)for binary classification to multicategory classification.The proposed method is based on a sequential binary classification algorithm.We first classify a target class by excluding the possibility of labeling as any other classes using a forward step of sequential SVM;we then exclude the already classified classes and repeat the same procedure for the remaining classes in a backward step.The proposed algorithm relies on SVM for each binary classification and utilizes only feasible data in each step;therefore,the method guarantees convergence and entails light computational burden.We prove Fisher consistency of the proposed forward–backward SVM(FB-SVM)and obtain a stochastic bound for the predicted misclassification rate.We conduct extensive simulations and analyze real-world data to demonstrate the superior performance of FB-SVM,for example,FB-SVM achieves a classification accuracy much higher than the current standard for predicting conversion from mild cognitive impairment to Alzheimer’s disease. | Xuan Zhou Yuanjia Wang Donglin Zeng | 2020 | Communications in Mathematics and Statistics2020，8，3： | 0 |
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