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| 1 | Realization of non-equilibrium process for high thermoelectric performance Sb-doped Ge Te显示文摘Pristine GeTe shows inferior thermoelectric performance around unit due to the large carrier concentration induced by the presence of intrinsic high concentration of Ge vacancy. In this study, we report a thermoelectric figure of merit ZT of 1.56 at 700 K, realized in Sb-doped GeTe based thermoelectric(TE)materials via combined effect of suppression of intrinsic Ge vacancy and Sb doping. The nonequilibrium nature during melt spinning process plays very important role. For one thing, it promotes the homogeneity in Ge_(1-x)Sb_xTe samples and refines the grain size of the product. Moreover the persistent Ge precipitated as impurity phase in the traditional synthesis process is found to be dissolved back into the GeTe sublattice, accompanying with a drastic suppression of Ge vacancies concentration which in combination with Sb electron doping significantly reduced the inherent carrier concentration in GeTe.Low carrier concentration, approaching the optimum carrier concentration ~3.74 × 10^(-20) cm^(-3) and a high power factor of 4.01 × 10^(-3) W m^(-1)K^(-2) at 750 K are achieved for Ge_(0.98)Sb_(0.02) Te sample. In addition,the enhanced grain boundary phonon scattering by refining the grain size through melt spinning(MS)process, coupled with the intensified alloying phonon scattering via Sb doping leads to low thermal conductivity of 1.53 W m^(-1) K^(-1) at 700 K for Ge_(0.94) Sb_(0.06) Te sample. All those contribute to a high ZT value,representing over 50% improvement in the ZT value compared to the Sb free samples, which provides an alternative way for ultrafast synthesis of high performance GeTe based thermoelectric material. | Evariste Nshimyimana Xianli Su Hongyao Xie Wei Liu Rigui Deng Tingting Luo Yonggao Yan Xinfeng Tang | 2018 | Science Bulletin2018，63，11： | 6 |
| 2 | Design and simulation of charge sensitive preamplifier with CMOS FET implemented as feedback capacitor C_(fp)显示文摘In this paper,to design a new preamplifier for optimum performances with charged-particle or heavy-ion detectors,the CMOS FET is implemented as a feedback capacitor Cfp,so that the entire system should be built only with MOSFET. This work is a revolution design because to realize an ASIC for a preamplifier circuit,the capacitor will also be included. We succeed after a simulation to maintain a rise time less than 3 ns,the output resistance less than 94 ? and the linearity almost good. | WEMBE TAFO Evariste SU Hong GAO Yanni WU Ming | 2008 | Nuclear Science and Techniques2008，19，4： | 3 |
| 3 | 基于DMOS管的电荷灵敏前置放大器设计显示文摘提出了一种由DMOS场效应管构成的电荷灵敏前置放大器,可用于硅,Si(Li),CdZnTe及CsI探测器。该前置放大器采用不同于传统的阻容反馈式的电路结构,完全使用MOS管搭建,该前放的设计完成为设计实现ASIC电路准备了技术基础。由Multisi m仿真结果看出该电荷灵敏前置放大器输出信号上升时间小于15ns,并且具有很好的稳定性。 | 高艳妮 苏弘 WEMBE TAFO Evariste | 2010 | 核电子学与探测技术2010，30，1： | 3 |
| 4 | Design and simulation of Gaussian shaping amplifier made only with CMOS FET for FEE of particle detector显示文摘The objective of this paper is to design and simulate a shaping amplifier circuit for silicon strip,Si(Li),CdZnTe and CsI detectors,etc.,which can be further integrated the whole system and adopted to develop CMOS-based application,specific integrated circuit for Front End Electronics(FEE) of read-out system of nuclear physics,particle physics and astrophysics research,etc.It's why we used only CMOS transistor to develop the entire system.A Pseudo-Gaussian shaping amplifier made by fourth-order integration stage and a differentiation stage give a result same as a true CR-RC4 filter,we perform shaping time in the range,465 ns to 2.76μs with a low output resistance and the linearity almost good. | WEMBE TAFO Evariste SU Hong QIAN Yi KONG Jie WANG Tongxi | 2010 | Nuclear Science and Techniques2010，21，5： | 2 |
| 5 | A low noise charge sensitive preamplifier with switch control feedback resistance显示文摘In this paper, the design and analysis of a new low noise charge sensitive preamplifier for silicon strip, Si(Li), CdZnTe and CsI detectors etc. with switch control feedback resistance were described, the entire system to be built using the CMOS transistors. The circuit configuration of the CSP proposed in this paper can be adopted to develop CMOS-based Application Specific Integrated Circuit further for Front End Electronics of read-out system of nuclear physics, particle physics and astrophysics research, etc. This work is an implemented design that we succeed after a simulation to obtain a rise time less than 3ns, the output resistance less than 94? and the linearity almost good. | WEMBE TAFO Evariste SU Hong PENG Yu WU Ming QIAN Yi | 2008 | Nuclear Science and Techniques2008，19，1： | 2 |
| 6 | 衬底温度对NiO:Cu/ZnO异质pn结的光电性能影响显示文摘利用磁控溅射方法改变衬底温度,制备了一系列NiO:Cu/ZnO异质pn结。实验结果表明,当衬底温度从室温升高到300℃时,NiO:Cu/ZnO异质pn结的整流特性明显得到改善;与此同时,NiO:Cu/ZnO异质pn结的光学透过率也从40%增大到80%。这可能是由于NiO:Cu薄膜结晶质量改善,薄膜内缺陷减少所致。继续增加衬底温度至400℃,异质结的整流特性有所削弱,这可能是由于生长在异质结下层的NiO:Cu薄膜影响了其上ZnO薄膜的生长,进而影响到异质结的整流特性。这一结论,得到X射线衍射(XRD)、原子力显微镜(AFM)和紫外(UV)谱测试结果的支持。 | 李彤 王铁钢 陈佳楣 倪晓昌 Evarist Mariam 赵新为 | 2016 | 光电子.激光2016，27，4： | 2 |
| 7 | Crustal structure beneath Cameroon from EGM2008显示文摘We used the Earth Gravitational Model( EGM2008) data sets to analyze the regional gravity anomalies and to study the underground structures in Cameroon. We first created a high-resolution Free-Air anomaly database,then corrected the gravity field of the topographic effect by using ETOPO1 DEM with a resolution of0.01° to obtain the Bouguer anomaly,then applied a multi-scale wavelet-analysis technique to separate the gravity-field components into different parts of shallow-to-deep origins,and finally used the logarithmic power spectrum technique to obtain detailed images and corresponding source depths as well as certain lateral inhomogeneity of structure density. The anomalies of shallow origin show successive elongated gravity 'highs'and'lows'attributable to subsurface Tertiary and lower Cretaceous undulations. Our results are in good agreement with previous investigations. | Ngatchou Heutchi Evariste Liu Genyou Tabod Charles Tabod Kamguia Joseph Nguiya Severin Tiedeu Alain KE Xiaoping | 2014 | Geodesy and Geodynamics2014，5，1： | 2 |
| 8 | 氧气含量对射频磁控溅射方法制备的NiO∶Cu/ZnO异质pn结的光电性能的影响显示文摘利用磁控溅射方法改变氧气含量制备了一系列NiO∶Cu/ZnO异质pn结。实验结果表明,氧含量对NiO∶Cu/ZnO异质pn结电学影响很大。相对于纯氩溅射,引入一定氧气(O2/(Ar+O2)比例为30%)后,NiO∶Cu/ZnO异质pn结的整流特性明显得到改善。与此同时,NiO∶Cu/ZnO异质pn结的光透过率也从40%增大到80%。这可能是由于氧气的轻量引入致使NiO∶Cu/ZnO异质pn结的结晶得到改善,薄膜内缺陷减少所致。进一步提高氧气含量,直到O2/(Ar+O2)比例至80%后,异质结的整流特性有所削弱,这可能是由于过多氧气的引入造成薄膜缺陷再次增多,进而影响到异质结的整流特性。这一结论得到了EDS、XRD、AFM和UV结果的支持。 | 李彤 EVARIST Mariam 王铁钢 陈佳楣 范其香 倪晓昌 赵新为 | 2016 | 发光学报2016，37，4： | 1 |
| 9 | On the linear programming approach to the optimality property of Prokhorov's distance 显示文摘 | Garc ia-Palomares U Evarist Gin e M | 1997 | Math Anal Appl1997，60，3： | 1 |
| 10 | 新型忆阻器PSPICE的建模仿真及或门电路应用显示文摘针对基于忆阻器的建模及利用忆阻器构建逻辑电路这一研究难点和热点,本文通过新的PSPICE仿真程序语句构造了忆阻器的内部结构,介绍了忆阻器子电路模块的构建及形成元器件的步骤,并连接于电路中进行仿真,验证忆阻器的特性;同时,利用该忆阻器构造或门电路,并对其进行了仿真验证。 | EVARIST Mariam 李彤 刘真真 王铁钢 范其香 魏刘源 | 2017 | 天津职业技术师范大学学报2017，27，1： | 1 |
| 11 | Correlation of CD11b and CD56 expression in adult acute myeloid leukemia with cytogenetic risk groups and prognosis显示文摘 | Jordi Juncà Montse Garcia-Caro Isabel Granada Inés Rodríguez-Hernández Anna Torrent Mireia Morgades Josep-Maria Ribera Fuensanta Millá Evarist Feliu | 2014 | Annals of Hematology2014，，9： | 1 |
| 12 | Some bootstrap tests of symmetry for univariate continuous distributions显示文摘 | Miguel A A Evarist G | 1991 | The Annals of Statistics1991，19，： | 1 |
| 13 | Switching dynamics in InP photonic-crystal nanocavity显示文摘在这份报纸,我们在 InP photonic 水晶(PhC ) 上介绍了切换的动态调查 nanocavity 结构使用 homodyne 泵探查大小。大小为管理洞性质的搬运人密度的动力学基于时间的非线性的联合模式理论和搬运人率方程与模拟相比。结果提供卓见进管理 nanocavities 的动力学的非线性的光过程。 | Yi YU Evarist PALUSHANI Mikkel HEUCK Leif Katsuo OXENLOWE Kresten YVIND Jesper MORK | 2016 | Frontiers of Optoelectronics2016，9，3： | 0 |
| 14 | 用于粒子探测器的CMOS FET采样保持电路的设计与仿真(英文)显示文摘介绍了一个峰保持电路。该电路适用于silicon strip,Si(Li),CdZn Te and CsI等探测器,实现采样-保持功能。已成功进行了基于CMOSFET的采样-保持电路的设计和仿真,通过使用Proteus的PSPICE仿真器和BSIMV3.3模型参数完成了电路性能的仿真。同时,实现了采样时间可在60ns到4.44s范围内进行选择,该电路具有较好的线性。 | WEMBE TAFO Evariste 苏弘 千奕 周朝阳 王同喜 | 2010 | 原子核物理评论2010，27，4： | 0 |
| 15 | A Review of the Advances Made in Improving the Durability of Welded Wood against Water in Light of the Results of African Tropical Woods Welding显示文摘Wood plays a major role in the production of furniture and wooden structures.Nevertheless,in this process,the massive use of adhesives and plural connectors remains a definite problem for health and the environment.Therefore,wood welding is a breakthrough in this respect.This paper reviews the applications of wood welding in furniture and construction and then examines advances in improving the durability of welded wood against water.Our contribution also highlights the need to join African tropical woods using the rotational friction welding technique.According to our results,these woods present interesting chemical singularities,which could provide solutions to the water vulnerability of the welded wood.Moreover,the use of such a joining method would first free the Cameroonian furniture industry from the chemical industry,secondly position it at the forefront of new eco-design trends and thirdly make it competitive with other countries in the Central African sub-region.These works enrich the long and rich bibliography on the technique of wood welding,which has long been conspicuous by its absence of tropical woods. | Jean Jalin Eyinga Biwôlé Achille Bernard Biwolé Antonio Pizzi Joseph Zobo Mfomo César Segovia Atangana Ateba Evariste Fedoung Fongnzossie Sahbi Ouertani Xinyi Chen Bénoît Ndiwe DieudonnéAbessolo Pierre-Jean Meausoone | 2023 | Journal of Renewable Materials2023，11，3： | 0 |
| 16 | Early dynamics of transmission and projections of COVID-19 in some West African countries显示文摘The initial cases of novel coronavirus(COVID-19)were identified in most West African countries between late February and early March of 2020.But it is only after March 15,2020 that the number of cases started rising significantly in these countries.This study analyzes the transmission dynamics of the outbreak in West Africa nearly 5 months after the effective onset.We focus on Cameroon,Ghana,Guinea and Nigeria,which are the four West African countries with the highest numbers of infected cases.We combine models of mathematical epidemiology and publicly available data to estimate the main disease transmission characteristics.In particular,we estimate the initial doubling time,the peak time,the peak rate,the final size and the short-term transmission forecasts of the COVID-19 epidemic for these countries.Policy implications for the effectiveness of control measures and for assessing the potential impact on public health in West Africa are discussed. | Jules-Clement Assob-Nguedia David Dongo Pierre Evariste Nguimkeu | 2020 | Infectious Disease Modelling2020，5，1： | 0 |
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