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FTIR-ATR chamber for observation of efflorescence and deliquescence processes of NaClO_(4) aerosol particles on ZnSe substrate

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Chinese Science Bulletin 2005年第19期50卷 2149-2152页

作者： zhang Yunhong hu yong'an DING Fei ZHAO Lijun Department of Chemistry School of Science Beijing Institute of Tech-nology Beijing 100081 China

NaClO4 aerosol particles with diameter of 5―20 microns are deposited on the ZnSe substrate. An FTIR-ATR chamber on the ZnSe substrate is set up to ob-serve the structural changes of NaClO4 aerosol particles at crystallization relative humidity (CRH) and deliquescence relative humidity (DRH). With the decrease of RH (relative humidity) from 96% to 24% in the efflorescence process, the absorbance of O-H stretching band of the aerosol solutions continuously decreases. A sudden decrease of the water peak is observed at RH20%, where solid particles form. Very small amount of residual interfacial water, with two weak peaks at 3602 and 3533 cm-1, can still be resolved in the FTIR-ATR spectra of the solid particles. In the deliquescence process of the same sample, little spectral changes are ob-served when the value of RH varies from 5% to 29%. Before the abrupt increase of the O-H stretching band at the DRH of about RH46%, a pre-deliquescence process is observed, i.e. in the RH range between 33% and 46%, there is really a slow absorbance increase for the peak area of O-H stretching band. The O-H stretching band shows an arciform O-H en-velope, totally different from not only the FTIR-ATR spectra of ClO4? solutions either under supersaturated state or in diluted state, but also the characteristic of the residually in-terfacial water discussed in the efflorescence process. Such kind of water is considered as pure water, indicating that small amount of water aggregates in the microspaces of solid aerosol particles due to the capillary cohesion effect. When the RH arrives at RH44%, two weak shoulders at 3384 and 3260 cm?1 can be resolved, and the solid NaClO4 particles begin to be dissolved by increasing capillary cohesion water. The spectral characteristic of the ν3-ClO4? band also shows the transition from solid particles to mainly solvated ClO4? ions.

关键词： FTIR-ATR 气溶胶毛细管凝聚 NaClO4 风化作用潮解作用

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Study on Excitation Function and Isospin Dependencies of Total Reaction Cross Section via the Boltzmann-Uehling-Uhlenbeck Model

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Chinese Physics Letters 2000年第8期17卷 565-567页

作者： CAI Xiang-Zhou SHEN Wen-Qing FENG Jun FANG De-Qing MA Yu-Gang SU Qian-Min zhang hu-yong hu Peng-Yun Shanghai Institute of Nuclear Research Chinese Academy of SciencesShanghai 201800 CCAST(WorId Laboratory) P.O.Box 8730Beijing 100080

The excitation function and isospin dependencies ofσR have been investigated by using the Boltzmann-Uehling-Uhlenbeck(BUU)model with a square-type density *** the width parameter of the square distribution is obtained by fittingσR at relativistic energies,the BUU-model can reproduce the experimental data at intermediate energies better than Glauber *** systematical underestimation ofσR at intermediate energy by Glauber model was removed out now by BUU calculation *** is also found thatσR is sensitive to nuclear equation of state andσin-NN *** difference factor d defined in text is sensitive to the nuclear structure such as neutron halo and neutron skin,etc.

关键词： BUU removed excitation

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Speech wideband extension based on Gaussian mixture model

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Chinese Journal of Acoustics 2009年第4期28卷 362-377页

作者： zhang yong hu Ruimin National Engineering Research Center for Multimedia software Wuhan University Wuhan430072

To decrease the spectral distortion of highband envelope, the function of spectral distortion and mutual information between feature vector and highband envelope was studied, and an extended Gaussian Mixture Model （GMM） bandwidth extension algorithm was proposed based on the research. The feature parameters which have larger mutual information with highband envelope were selected to constitute the feature vector, and the GMM was adopted to compute the joint probability density of the feature vector and highband envelope. Then the highband envelope was estimated via the posterior probabilities computed from the model parameters estimated by Expectation-Maximization （EM） algorithm. The experimental results show that the spectral distortion is lower than the algorithm, such as the traditional algorithm based on GMM, by 0.3 dB and the number of frames with spectral distortion over 10 dB sharply reduced over 50%.

关键词： GMM PESQ LSF Speech wideband extension based on Gaussian mixture model TIMIT

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Carbon nanostructures produced through ion irradiation

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Nuclear Science and Techniques 2003年第2期14卷 107-114页

作者： YU Li-Ping, WANG Zhen-Xia, Zhu Zhi-Yuan, zhang hu-yong, HAN Jia-Guang, zhang Wei, SUN Li-Tao,WANG Ting-Tai, MA Yu-Gang (Shanghai Institute of Nuclear Research, the Chinese Academy of Sciences, Shanghai 201800) Shanghai Institute of Nuclear Research the Chinese Academy of Sciences 上海 201800

Several nanostructures we produced by ion irradiation have been reviewed in this paper. By using ions to irradiate two ultrahigh molecular weight polyethylene targets respectively, it was found that small fullerenes C20 and C26 were grown, adding two members to the fullerene family. Meanwhile, crystalline diamonds also have been produced by Ar+ ions irradiation of graphite. In the experiment of double ions Ni+ and Ar+ irradiation, nanoscale argon bubbles formed. On the other side, when multi-wall carbon nanotubes were irradiated by C+, many MWCNTs evolved to amorphous carbon nanowires and amorphous carbon nanotubes. And there are possible welding in the crossed nanotubes.

关键词：碳纳米结构离子辐射聚乙烯

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Directed and Elliptic Flows in ^(112)Sn+^(112)Sn Collisions

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Chinese Physics Letters 2001年第6期18卷 756-758页

作者： zhang hu-yong MA Yu-Gang YU Li-Ping SHEN Wen-Qing CAI Xiang-Zhou FANG De-Qing ZHONG Chen HAN Ding-Ding Shanghai Institute of Nuclear Research Chinese Academy of SciencesShanghai 201800 Department of Physics Ningbo UniversityNingbo 315211 Department of Electronic Engineering East China Normal UniversityShanghai 200062

The directed and elliptic flow in collisions of ^(112)Sn+^(112)Sn at energies from 35 to 90 MeV/nucleon are studied in an isospin-dependent quantum molecule dynamics *** increasing incident energy,the directed flow rises from negative to *** magnitude depends on the nuclear equation of state(EOS).However,the elliptic flow decreases with increasing incident energy and its magnitude is not very sensible to *** studies of the impact parameter dependence and the cluster mass dependence are also *** study of directed flow at intermediate energies thus provides a means of extracting the information on the nuclear equation of state.

关键词： state directed flow

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后申遗时代京杭运河体育文化资源现状与发展路径选择

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北京体育大学学报 2018年第1期41卷 43-49页

作者：张永虎聊城大学体育学院山东聊城252059

京杭运河成功入选世界文化遗产名录后,体育文化建设问题将受到政府和社会的广泛关注,也将成为体育学术界研究的重点课题。采用文献研究、实地考察结合专家访谈法,对后申遗时代京杭运河体育文化资源现状进行调研。结果表明,京杭运河不同... 详细信息

京杭运河成功入选世界文化遗产名录后,体育文化建设问题将受到政府和社会的广泛关注,也将成为体育学术界研究的重点课题。采用文献研究、实地考察结合专家访谈法,对后申遗时代京杭运河体育文化资源现状进行调研。结果表明,京杭运河不同区段具有不同的体育文化特色,以中国运河命名的公园、体育公园的体育文化活动特色各异,运河体育场馆资源在服务体育赛事和全民健身中发挥重要作用。为了更好的推动后申遗时代京杭运河体育文化建设的快速发展,促进体育文化消费升级,据此提出,通过建立京杭运河体育文化产业基地,创新民生型运河体育文化建设的运行机制,提升运河体育旅游开发动力机制、创新体育旅游文化新业态,提升运河城市体育文化广场建设的数量和服务质量等发展路径,实现京杭运河体育文化建设的可持续发展。

关键词：世界文化遗产后申遗时代京杭运河体育文化体育旅游体育公园

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Measurements of Total Reaction Cross Section for Light Nuclei and Evidence for the Anomalous Nuclear Structure in ^(15)C

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Chinese Physics Letters 2000年第9期17卷 655-657页

作者： FANG De-Qing SHEN Wen-Qing FENG Jun CAI Xiang-Zhou WANG Jian-song SU Qian-Min zhang hu-yong hu Peng-Yun MA Yu-Gang Zhu yong-tai LI Song-Lin WU He-Yu GOU Quan-bu JIN Gen-Ming ZHAN Wen-Long GUO Zhong-Yan XIAO Guo-Qing Shanghai Institute of Nuclear Research Chinese Academy of SciencesShanghai 201800 Institute of Modern Physics Chinese Academy of SciencesLanzhuo 730000

Measurements of the total reaction cross section for^(12-16)C,^(14-17)N and^(16-18)O on carbon target at intermediate energies were performed on RIBLL of HIRFL.A larger enhancement ofσR for^(15)C was observed than that for its *** analysis of these data indicates possible existence of an anomalous nuclear structure in^(15)C.A new quantity was suggested as the criterion to distinguish anomalous structure nuclei from normal nuclei.

关键词： criterion structure neighbor

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Poissonian Reducibility and Thermal Scaling in Nuclear Dissociation

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Chinese Physics Letters 2001年第7期18卷 897-899页

作者： MA Yu-Gang SHEN Wen-Qing Zhu Zhi-Yuan zhang hu-yong YU Li-Ping CAI Xiang-Zhou FANG De-Qing ZHONG Chen Shanghai Institute of Nuclear Research Chinese Academy of SciencesShanghai 201800 Department of Physics Ningbo UniversityNingbo 315211

The emission of clusters in the nuclear dissociation was investigated within the framework of isospin dependent lattice gas *** observed in the recent experimental data,it was found that the emission probability of individual cluster is Poissonian and thermal scaling was observed in the linear Arrhenius plots made from the average multiplicity of each cluster as a function of the inverse ***‘emission barriers’were extracted from the slopes of the Arrhenius plots and mainly depends on the surface energy of the cluster.

关键词： temperature cluster. cluster

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山东运河文化带体育旅游市场发展路径探究

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山东体育学院学报 2014年第6期30卷 39-45页

作者：张永虎聊城大学体育学院山东聊城252059

京杭大运河成为世界文化遗产,运河旅游商业价值增加。运用文献资料法、问卷调查法并结合田野调查,对山东运河城市体育旅游资源和体育旅游市场状况进行了统计与分析,针对体育旅游资源开发中的诸多问题,提出了体育旅游的发展对策,具体包括... 详细信息

京杭大运河成为世界文化遗产,运河旅游商业价值增加。运用文献资料法、问卷调查法并结合田野调查,对山东运河城市体育旅游资源和体育旅游市场状况进行了统计与分析,针对体育旅游资源开发中的诸多问题,提出了体育旅游的发展对策,具体包括:充实现有景点体育内涵,推进体育旅游设施标准化;同步发展关联产业,延长产业链条;筹建大规模游乐项目,引进现代大型旅游文化产业集团;申办景观体育赛事等。旨在为运河沿岸城市体育旅游开发谋出路,觅对策,为整个旅游业市场的可持续发展提供参考。

关键词：山东运河城市体育旅游运河文化遗产保护

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QPSK调制多载波信号时延在线测量技术

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计量学报 2016年第6期37卷 649-652页

作者：张靖悉胡勇李玥中国西南电子技术研究所

针对传统通用仪器无法完成对新一代扩频测控系统QPSK调制多载波信号时延在线测量的难题，通过对基于QPSK调制的多载波信号进行深入研究，提出了此类信号时延测量方法：利用光纤传输实现了同步信号上升沿低失真远距离传输；利用FIR数字... 详细信息

针对传统通用仪器无法完成对新一代扩频测控系统QPSK调制多载波信号时延在线测量的难题，通过对基于QPSK调制的多载波信号进行深入研究，提出了此类信号时延测量方法：利用光纤传输实现了同步信号上升沿低失真远距离传输；利用FIR数字滤波实现了无非线性失真、滤波时延可计算的多载波分离；利用结合时间窗的解包络技术实现了QPSK调制信号的时延测量。并基于上述测量方法提出了测量系统构架，研制了QPSK调制多载波信号时延测量系统，完成了对转发式卫星导航试验系统射频信道上行链路时延在线高精度测量。

关键词：计量学扩频测控多载波 QPSK 时延在线测量

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