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A reference voltage in capacitor–resister hybrid SAR ADC for front-end readout system of CZT detector

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Journal of Semiconductors 2016年第1期37卷 113-118页

作者：刘伟魏廷存李博杨利锋胡永才 School of Computer Science and Technology Northwestern Polytechnical University Xi'an 710072 China institute pluridisciplinaire hubert curien Strasbourg France

An on-chip reference voltage has been designed in capacitor-resister hybrid SAR ADC for CZT detec- tor with the TSMC 0.35 μm 2P4M CMOS process. The voltage reference has a dynamic load since using variable capacitors and resistances, which need a large driving ability to deal with the current related to the time and sampling rate. Most of the previous articles about the reference for ADC present only the bandgap part for a low temperature coefficient and high PSRR. However, it is not enough and overall, it needs to consider the output driving ability. The proposed voltage reference is realized by the band-gap reference, voltage generator and output buffer. Apart from a low temperature coefficient and high PSRR, it has the features of a large driving ability and low power con- sumption. What is more, for CZT detectors application in space, a radiation-hardened design has been considered. The measurement results show that the output reference voltage of the buffer is 4.096 V. When the temperature varied from 0 to 80 ℃, the temperature coefficient is 12.2 ppm/℃. The PSRR was -70 dB @ 100 kHz. The drive current of the reference can reach up to 10 mA. The area of the voltage reference in the SAR ADC chip is only 449 × 614μm2. The total power consumption is only 1.092 mW.

关键词： reference voltage SAR ADC CZT detector

Iterative Reconstruction for Transmission Tomography on GPU Using Nvidia CUDA

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Tsinghua Science and Technology 2010年第1期15卷 11-16页

作者： Damien Vintache Bernard Humbert David Brasse Institut pluridisciplinaire hubert curien CNRS/IN2P323 rue du Loess BP28 67037 StrasbourgFrance

The iterative reconstruction algorithms for X-ray CT image reconstruction suffer from their high computational cost. Recently Nvidia releases common unified device architecture （CUDA）, allowing developers to access to the processing power of Nvidia graphical processing units （GPUs）, in order to perform general purpose computations. The use of the GPU, as an alternative computation platform, allows decreasing processing times, for parallel algorithms. This paper aims to demonstrate the feasibility of such an implementation for the iterative image reconstruction. The ordered subsets convex （OSC） algorithm, an iterative reconstruction algorithm for transmission tomography, has been developed with CUDA. The performances have been evaluated and compared with another implementation using a single CPU node. The result shows that speed-ups of two orders of magnitude, with a negligible impact on image accuracy, have been observed.

关键词： tomography image reconstruction parallel processing

High pt and photon physics with ALICE at LHC

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Chinese Physics C 2010年第9期34卷 1383-1386页

作者：周代翠万仁卓毛亚显 Y.Schutz 王梦亮马科王亚平殷中宝蔡勖 Y.Kharlov G.Conesa C.Roy institute of Particle Physics Huazhong Normal UniversityKey Laboratory of Quark & Lepton Physics (Ministry of Education) institute pluridisciplinaire hubert curien University of Strasbourg Laboratoire de Physique Subatomique et de Cosmologie CERN institute for High Energy Physics(Russia)

ALICE,A Large Ion Collider Experiment,is dedicated to study the QCD matter at extreme high temperature and density to understand the Quark Gluon Plasma （QGP） and phase ***-transversemomentum photons and neutral mesons from the initial hard scattering of partons can be measured with ALICE calorimeters,PHOS （PHOton Spectrometer） and EMCAL （ElectroMagnetic CALorimeter）.Combing the additional central tracking detectors,the γ-jet and π 0-jet measurements thus can be *** measurements offer us a sensitive tomography probe of the hot-dense medium generated in the heavy ion *** this paper,high p T and photon physics is discussed and the ALICE calorimeters capabilities of high-transverse-momentum neutral mesons and γ-jet measurements are presented.

关键词： ALICE experiment PHOS EMCAL Jet quenching γ-jet measurement

Optically induced abnormal terahertz absorption in black silicon

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Chinese Physics B 2018年第2期27卷 570-574页

作者：翟东为刘海玲 Xxx Sedao 杨玉平 School of Science Minzu University of China Labo hubert curien University of Lyon

The absorption responses of blank silicon and black silicon（silicon with micro/nano-conical surface structures） wafers to an 808-nm continuous-wave（CW） laser are investigated at room temperature by terahertz time-domain spectroscopy. The transmission of the blank silicon shows an appreciable change, from ground state to the pump state, with amplitude varying up to 50%, while that of the black silicon（BS） with different cone sizes is observed to be more stable. Furthermore,the terahertz transmission through BS is observed to be strongly dependent on the size of the conical structure *** conductivities of blank silicon and BS are extracted from the experimental data with and without pumping. The non-photo-excited conductivities increase with increasing frequency and agree well with the Lorentz model, whereas the photo-excited conductivities decrease with increasing frequency and fit well with the Drude–Smith model. Indeed, for BS, the conductivity, electron density and mobility are found to correlate closely with the size of the conical *** is attributed to the influence of space confinement on the carrier excitation, that is, the carriers excited at the BS conical structure surface have a stronger localization effect with a backscattering behavior in small-sized microstructures and a higher recombination rate due to increased electron interaction and collision with electrons, interfaces and grain boundaries.

关键词： terahertz spectroscopy black silicon ultrafast phenomena

Experimental and Simulated Effective Dose for Some Building Materials in France

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World Journal of Nuclear Science and Technology 2013年第2期3卷 41-45页

作者： Samir Dziri Abdellatif Nachab Abdelmjid Nourreddine Addil Sellam Dominique Gelus Groupe RaMsEs Institut Pluridisciplinaire Hubert Curien (IPHC) Université de Strasbourg Strasbourg France

The specific radioactivity of several building materials used in France, which is considered a direct exposure to radiation, has been assessed by γ-ray spectrometry. Corrected for coincidence summing and self-absorption effects, the values for 226Ra, 232Th and 40K were in the ranges 4 - 56, 3 - 72 and 9 - 1136 Bq·kg-1, respectively. The samples were found to have radium-equivalent activities between 5 and 245 Bq·kg-1. Values of 0.02 - 0.67 for the external and 0.03 - 0.82 for the internal hazard indexes were estimated. The calculated absorbed dose in air agrees closely with MCNPX simulations. The conversion of absorbed dose to annual effective dose gave values between 0.03 - 1.09 mSv·y-1. All these values are below action limits recommended by the International Commission on Radiological Protection. The materials examined would not contribute a significant radiation exposure for an occupant and thus are acceptable for construction.

关键词： Building Materials Hazard Indexes Radium-Equivalent Absorbed Dose Annual Effective Dose MCNPX

High-Density Nanowells Formation in Ultrafast Laser-Irradiated Thin Film Metallic Glass

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Nano-Micro Letters 2022年第6期14卷 308-322页

作者： Mathilde Prudent Djafar Iabbaden Florent Bourquard Stéphanie Reynaud Yaya Lefkir Alejandro Borroto Jean-François Pierson Florence Garrelie Jean-Philippe Colombier Univ Lyon UJM-Saint-EtienneCNRSInstitute of Optics Graduate SchoolLaboratoire Hubert CurienUMR CNRS 551642023 St-EtienneFrance Universitéde Lorraine CNRSIJL54000 NancyFrance

We present an effective approach for fabricating nanowell arrays in a one-step laser process with promising applications for the storage and detection of chemical or biological *** thin films of metallic glasses are manufactured with a selected composition of Zr_(65)Cu_(35),known to exhibit remarkable mechanical properties and glass forming *** nanowell arrays spontaneously form in the ultrafast laser irradiation spot with dimensions down to 20 *** flared shape observed by transmission electron microscopy is ideal to ensure chemical or biological material immobilization into the *** also indicates that the localization of the cavitation-induced nanopores can be tuned by the density and size of the initial nanometric interstice from the columnar structure of films deposited by magnetron *** addition to the topographic functionalization,the laser-irradiated amorphous material exhibits structural changes analyzed by spectroscopic techniques at the nanoscale such as energy-dispersive X-ray spectroscopy and electron energy loss *** reveal structural changes consisting of nanocrystals of monoclinic zirconia that grow within the amorphous *** mechanism is driven by local oxidation process catalyzed by extreme temperature and pressure conditions estimated by an atomistic simulation of the laser-induced nanowell formation.

关键词： Nanowell Nanoripple Metallic glass Surface functionalization Femtosecond laser

A longitudinal network analysis of social dynamics in rooks corvus frugilegus： repeated group modifications do not affect social network in captive rooks

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Current Zoology 2017年第5期63卷 379-388页

作者： Palmyre H. BOUCHERIE Sebastian SOSA Cristian PASQUARETTA Valerie DUFOUR Institut pluridisciplinaire hubert curien University of Strasbourg 23 rue Becquerel 67087 Strasbourg France Centre National de la Recherche Scientifique UMR 7178 67087 Strasbourg France Formerly affiliated with Grupo de Conducta Adaptativa e Interacci6n Psychology Faculty University of Barcelona 08035 Barcelona Spain

Numerous studies have investigated the remarkable variation of social features and the resulting structures across species. Indeed, relationships are dynamic and vary in time according to various factors such as environmental conditions or individuals attributes. However, few studies have investigated the processes that stabilize the structures within a given species, and the behavioral mechanisms that ensure their coherence and continuity across time. Here, we used a dynamic actor-based model, RSiena, to investigate the consistency of the temporal dynamic of relationships of a group of captive rooks facing recurrent modifications in group composition （i.e., the loss and introduction of individuals）. We found that changes in relationships （i.e., formation and removal） followed consistent patterns regardless of group composition and sex-ratio. Rooks preferentially interacted with paired congeners （i.e., unpopular attachment） and were more likely to form rela- tionships with individuals bonded to a current social partner （i.e., ＂friends of friends＂, or triadic closure）. The sex of individuals had no effect on the dynamic of relationships. This robust behav- ioral mechanisms formed the basis of inter-connected networks, composed of sub-structures of in- dividuals emerging from the enmeshment of dyadic and triadic motifs. Overall, the present study reveals crucial aspects of the behavioral mechanisms shaping rooks social structure, suggesting that rooks live in a well-integrated society, going far beyond the unique monogamous pair-bond.

关键词： corvids preferential attachment social interactions social network analysis temporal dynamics triadic closure.

A Melamine–Dialdehyde Starch Wood Particleboard Surface Finish without Formaldehyde

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Journal of Renewable Materials 2023年第11期11卷 3867-3889页

作者： Bengang Zhang Antonio Pizzi Mathieu Petrissans Anelie Petrissans Baptiste Colin LERMAB I.U.T.Hubert CurienUniversity of LorraineÉpinal88000France LERMAB-ENSTIB University of LorraineÉpinal88000France

Melamine-dialdehyde starch resins used for wood surface finishes have been *** reaction of melamine with dialdehyde starch has been shown to occur by FTIR and MALDI ToF spectrometry,with several oligomer species due to the reaction of the two materials being identified,and the resin thermal stability was studied by thermogravimetric *** resins were prepared by two different procedures when it was realized that dialdehyde starch is sensitive to too high a temperature for prolonged *** melamine-dialdehyde starch resins were applied on particleboard supports as a direct liquid surface finish and a resin-impregnated *** surface finishes were tested for adhesion by the cross-cut test,their initial sessile drop contact angle,and the contact angle evolution as a function of *** best results were obtained by the resins catalyzed by 2% ammonium sulfate and applied to the support surface as a resin-impregnated paper hot pressed for 3 min at 200℃,although the results at 180℃ also looked promising.

关键词： Melamine-dialdehyde starch resins wood surfaceﬁnishes FTIR MALDI ToF

Self-Cross-Linked Tannin-Aminated Tannin Surface Coatings for Particleboard

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Journal of Renewable Materials 2023年第12期11卷 4097-4121页

作者： Bengang Zhang Antonio Pizzi Mathieu Petrissans Anelie Petrissans Colin Baptiste LERMAB I.U.T.Hubert CurienUniversity of LorraineÉpinal88000France LERMAB-ENSTIB University of LorraineEpinal88000France

Aminated tannins were prepared by reacting mimosa condensed tannin extract with ammonia yielding the substitution of many,if not all of the tannin hydroxyl groups with–NH_(2)groups.A tannin-aminated tannin(ATT)particleboard coating was then prepared by reacting raw tannin extract with aminated tannin extract and thus cross-linking the two by substituting tannin’s hydroxyl groups with the–NH_(2)groups on the aminated tannin to form–NH-bridges between the *** resulting particleboard coating gave encouraging results when pressed at 180℃for 3 ***,the system in which tannin was reacted/cross-liked with urea(ATU)by a similar amination reaction did not perform as well as the ATT system,and this even when a higher curing temperature and longer hot press time were *** particular its water repellence was worse probably due to the presence of urea and such a system with lower ***,substituting the tannin–OHs with the urea–NH_(2)groups appeared to also take *** gave better results than ATU as regards water repellence and mechanical resistance as shown by the cross cut *** ATT system was shown to be between 95%and 98%*** difference appeared to be due,by TMA analysis,to the much faster formation of the ATT hardened network leading to a better cross-linked polymer *** chemical species formed for both the ATT and ATU system were studied by MALDI ToF and CP MAS^(13)C NMR.

关键词： Biocoatings particleboard aminated tannin cross-linked tannin-aminated tannin tannin-urea cross links water repellence cross cut test MALDI ToF ^(13)C NMR