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An inversion decomposition test based on Monte Carlo response matrix on the γ-ray spectra from NaI(Tl) scintillation detector

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Nuclear Science and Techniques 2016年第4期27卷 181-192页

作者： Jian-feng He Qi-fan Wu Jian-Ping Cheng fang fang Yao-Zong Yang Jin-hui Qu Department of Engineering Physics Tsinghua University Beijing 100084 China Fundamental Science on Radioactive Geology and Exploration Technology Laboratory East China University of Technology Nanchang Jiangxi 330013 China College of Information Sciences and Technology Chengdu University of Technology Chengdu 610059 China Jiujiang Power Supply Subsidiary Company of State Grid Jiangxi Electronic Power Company Jiujiang 332000 China

The Na I(Tl) scintillation detector has a number of unique advantages, including wide use, high light yield,and its low price. It is difficult to obtain the decomposition of instrument response spectrum because of limitations associated with the Na I(Tl) scintillation detector's energy resolution. This paper, based on the physical process of c photons released from decay nuclides, generating an instrument response spectrum, uses the Monte Carlo method to simulate c photons with Na I(Tl) scintillation detector interaction. The Monte Carlo response matrix is established by different single energy γ-rays with detector effects. The Gold and the improved Boosted-Gold iterative algorithms have also been used in this paper to solve the response matrix parameters through decomposing tests,such as simulating a multi-characteristic energy c-ray spectrum and simulating synthesized overlapping peaks cray spectrum. An inversion decomposition of the c instrument response spectrum for measured samples(U series, Th series and U–Th mixed sources, among others)can be achieved under the response matrix. The decomposing spectrum can be better distinguished between the similar energy characteristic peaks, which improve the error levels of activity analysis caused by the overlapping peak with significant effects.

关键词：闪烁探测器矩阵分解蒙特卡洛 NaI γ射线反演光谱能量分辨率

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Catalytic hydrogenation of insoluble organic matter of CS_(2)/Acetone from coal over mesoporous HZSM-5 supported Ni and Ru

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Frontiers of Chemical Science and Engineering 2022年第10期16卷 1505-1513页

作者： Reyila Abuduwayiti feng-Yun Ma Xing fan Key Laboratory of Coal Clean Conversion&Chemical Engineering Process of Xinjiang Uygur Autonomous Region Xinjiang UniversityUrumqi 830046China College of Chemical and Biological Engineering Shandong University of Science and TechnologyQingdao 266590China

Four supported catalysts,nickel and ruthenium on a HZSM-5 support,were prepared by equal volume impregnation and in-situ decomposition of carbonyl *** properties of catalysts were investigated by catalytic hydro-conversion of 2,2′-dinaphthyl ether as the model compound and extraction residue of Naomaohu lignite as the sample under an initial H2 pressure of 5 MPa and temperature at 150℃.According to the catalytic hydroconversion results of the model compound,Ni−Ru/HZSM5 exhibited the best catalytic *** not only activated H2 into H…H,but also further heterolytically split H…H into immobile H‒attached on the acidic centers of Ni−Ru/HZSM-5 and relatively mobile H+.Catalytic hydro-conversion of the extraction residue from Naomaohu lignite was further examined over the optimized catalyst,Ni−Ru/*** molecular compositions of products from the extraction residue with and without hydrogenation were characterized by Fourier transform infrared spectroscopy and gas chromatography/mass *** analytical results showed that the oxygencontaining functional groups in products of hydrogenated extraction residue were obviously reduced after the catalytic *** relative content of oxygenates in the product with catalytic treatment was 18.57%lower than that in the product without catalytic treatment.

关键词： HZSM-5 Ni-based catalyst catalytic hydrogenation coal model compound

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GIS and DEM based analysis of incision and drainage reorganization of the Buyuan River basin in the upper Lancang-Mekong of China since the Late Pleistocene

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Journal of Geographical Sciences 2020年第9期30卷 1495-1506页

作者： GU Zhenkui fan hui YANG Kun Yunnan Key Laboratory of In ternational Rivers and Tran sbo un dary Eco-Security Institute of International Rivers and Eco-SecurityYunnan UniversityKunming 650091China

River incision and drainage reorganization have an important impact on the site selection of many major projects including city,road and others,and are the key issues of Quaternary environmental *** of river incision and river-network adjustment have traditionally been based on extensive field evidence,such as sediment age and beheaded river *** Buyuan River basin is a large sub-basin of the upper Lancang-Mekong,with high mountains and extremely active *** latter affects the preservation of the Quaternary period sediments leading to difficulties in understanding the main evolution characteristics of the *** study investigates differences in the equilibrium state of the longitudinal profile,infers incision rates,and evaluates drainage divide migration timelines using the stream-power incision model,the latest morphological dating,and Chi-plots(χ–z) based on digital elevation models(DEMs) on the GIS software *** final results show that two significant erosion base-level decreases occurred in the Late Pleistocene at *** incision rate of the mainstream might have been 0–2.99 mm/yr since 100 ka BP and 0–3.28 mm/yr since 46 ka *** Chi-values across the divides suggest that space limited(or constrained) river reorganization and that there is no severe reorganization in the basin;the imbalance of traceable erosion only exists in local *** main driving force for the geomorphologic evolution of the Buyuan River basin is likely climate fluctuations rather than strong tectonic uplift since the Late Pleistocene.

关键词： incision rate river reorganization morphometric dating Buyuan River Lancang-Mekong

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Effective regulation mechanisms of Fe-Ni(oxy)hydroxide:Ni-rich heteroatomic bonding(Ni–O–Fe–O–Ni)is essential

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Nano Research 2023年第10期16卷 12026-12034页

作者： Ruo-Yao fan hui-Ying Zhao Zi-Yi Zhao Wen-hui Hu Xin Liu Jian-feng Yu Han Hu Yong-Ming Chai Bin Dong State Key Laboratory of Heavy Oil Processing College of Chemistry and Chemical EngineeringChina University of Petroleum(East China)Qingdao 266580China Stanford PULSE Institute SLAC National Accelerator LaboratoryMenlo ParkCA 95025USA

Although Fe-Ni combination performs well in transition metal-based oxygen evolution reaction(OER)electrocatalysts,there are lack of clear and general regulations mechanism to fully play the synergistic catalytic ***,we made the utmost of the interaction of Fe–Ni heteroatomic pair to obtain a highly active Fe-Ni(oxy)hydroxide catalytic layer on iron foam(IF)and nickel foam(NF)by in-situ electrochemical deposition and rapid surface reconstruction,which only required 327 and 351 mV overpotential to provide a large current of 1,000 mA·cm^(−2),*** results confirm that the moderate Ni-rich heteroatomic bonding(Ni–O–Fe–O–Ni)formed by adjusting the Ni/Fe ratio on the catalyst surface is important to offer predominant OER *** is a key component that enhances OER activity of Ni(O)OH,but Fe-rich structural surface formed by Fe–O–Ni–O–Fe bonding is not ***,the remarkable oxygen evolution performance of the prepared Ni2Fe(O)OH/IF and FeNi2(O)OH/NF can be chalked up to the optimized electronic structure of Fe–Ni heteroatomic bonding,the efficient gas spillover,the fast electron transport,and nanosheet clusters *** summary,our work suggests a comprehensive regulation mechanism for the construction of efficient Fe-Ni(oxy)hydroxide catalytic layer on inexpensive,stable,and self-supporting metallic material surface.

关键词： Fe-Ni(oxy)hydroxide oxygen evolution reaction(OER) heteroatomic bonding Ni-rich structure regulation mechanisms

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Ce and Se co-doped MBG/SA/HLC microgel bone powder for repairing tumor bone defects

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Nano Research 2023年第1期16卷 746-756页

作者： Miaolin fan Wan Liu Cuiying fan Xiaoyan Zheng Junfeng hui Chaoquan Hu Daidi fan Shaanxi Key Laboratory of Degradable Biomedical Materials Shaanxi R&D Center of Biomaterials and Fermentation EngineeringSchool of Chemical EngineeringNorthwest UniversityXi’an 710069China Biotech.&Biomed.Research Institute Northwest UniversityXi’an 710069China Xi’an Giant Biogene Technology Co. Ltd.Xi’an 710069China Nanjing IPE Institute of Green Manufacturing Industry Nanjing 211100China

The repair and treatment of tumor bone defects is a difficult problem to solve urgently in clinical *** tumor resection,patients are not only faced with a large area of bone defect,but also may have the risk of tumor recurrence,which can easily cause huge physical and mental harm to *** this study,we successfully designed and constructed an organic/inorganic composite microgel bone powder(S-H-M3%Ce/3%Se)based on cerium(Ce)and selenium(Se)elements co-doped mesoporous bioactive glass(M3%Ce/3%Se),sodium alginate(SA),and recombinant human-like collagen(HLC).The obtained S-H-M3%Ce/3%Se could inhibit the growth of osteoma cells and promote the growth of normal cells,and effectively promote the repair of defect *** integration of the“treatment and repair”organic/inorganic composite microgel bone powder provided a new strategy for the treatment of cancerous bone defects.

关键词： mesoporous bioactive glass functional elements osteoma inhibition bone repair

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A new approach to the time evolution of characteristic function of the density operator obtained by virtue of thermal entangled state representation

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Science China(Physics,Mechanics & Astronomy) 2012年第11期55卷 2076-2080页

作者： CHEN feng fan HongYi Department of Material Science and Engineering University of Science and Technology of ChinaHefei 230026China Department of Mathematics and Physics Hefei UniversityHefei 230022China

Like the progress made by Dirac that wave function ψ(x) was reformed as x |ψ,where x| is the coordinate representation,we endow the characteristic function χλ = Tr(e λa-λaρ) of density operator ρ with the meaning of wave function of |ρ in the thermal entangled state η| representation in the doubled Fock space,χλ = η = λ|ρ,where |ρ = ρ|η = *** find the time evolution of χλ can then be directly and neatly obtained via this *** way of deriving the density operator from η = λ | ρ is also presented.

关键词： characteristic function density operator master equations thermal entangled state representation

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The practically renewable and highly efficient electrocatalysts derived from a newly-designed Mo_(8)Pt polyoxometalate compound

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Science China Chemistry 2023年第2期66卷 492-499页

作者： Di Yin Yun-Dong Cao Yi feng Guang-Gang Gao Hong Liu Lin-Lin fan Zhen-hui Kang School of Materials Science and Engineering University of JinanJinan250022China Institute of Functional Nano and Soft Materials(FUNSOM) Jiangsu Key Laboratory for Carbon-based Functional Materials and DevicesSoochow UniversitySuzhou215123China Macao Institute of Materials Science and Engineering(MIMSE) MUST-SUDA Joint Research Center for Advanced Functional MaterialsMacao University of Science and TechnologyTaipaMacao999078China

Platinum(Pt)catalysts are the most practical electrocatalysts;however,their low abundance and high cost severely limit their large-scale *** recovery is a key issue to be resolved before the use of Pt-based electrocatalysts can be broadly ***,the newly designed polyoxometalate[Pt^(II)(NH_(3))_(4)]_(2)[Mo_(8)O26](Mo_(8)Pt)acts as an ideal recycling medium for renewable and highly effective Pt *** from Mo_(8)Pt,by a facile reduction reaction,the formed Pt/Mo_(2)C/Mo_(2)N@C-N electrocatalyst shows superior electrocatalytic activity as compared to commercial Pt/C(20%)under both acidic and alkaline ***,the reaction of Pt/Mo_(2)C/Mo_(2)N@C-N in H_(2)O_(2)solution can regenerate Mo_(8)Pt for Pt *** is also demonstrated that the Pt electrocatalyst can be used for at least five rounds of recycling and regeneration,showing its efficiency and stability as well as its *** work highlights a recycling medium strategy to the new generation of renewable Pt-based catalysts.

关键词： platinum polyoxometalate electrocatalyst recycling-medium renewability

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Federated Reinforcement Learning with Adaptive Training Times for Edge Caching

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China Communications 2022年第8期19卷 57-72页

作者： Shaoshuai fan Liyun Hu hui Tian State Key Laboratory of Networking and Switching Technology Beijing University of Posts and TelecommunicationsBeijing 100876China

To relieve the backhaul link stress and reduce the content acquisition delay,mobile edge caching has become one of the promising *** this paper,a novel federated reinforcement learning(FRL)method with adaptive training times is proposed for edge *** a new federated learning process with the asynchronous model training process and synchronous global aggregation process,the proposed FRL-based edge caching algorithm mitigates the performance degradation brought by the non-identically and independently distributed(noni.i.d.)characteristics of content popularity among edge *** theoretical bound of the loss function difference is analyzed in the paper,based on which the training times adaption mechanism is proposed to deal with the tradeoff between local training and global aggregation for each edge node in the *** simulations have verified that the proposed FRL-based edge caching method outperforms other baseline methods in terms of the caching benefit,the cache hit ratio and the convergence speed.

关键词： edge caching federated reinforcement learning(FRL) non-identically and independently distributed(non-i.i.d.)

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D1S549等6个短串重复序列基因座在河南汉族群体的遗传多态性

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新乡医学院学报 2003年第5期20卷 310-313页

作者：丰慧根范雪晖李延兰申成斌刘慧娟林俊堂王文锋新乡医学院细胞生物学教研室河南新乡453003 河南省公安刑事科学技术研究所河南郑州450003

目的　探讨河南汉族群体的D1S5 49、D3S175 4、D2 2S683和CSF1PO、TPOX、TH0 1基因座遗传多态性分布。方法　ACD抗凝血样采自 2 19名无血缘关系汉族个体 ,酚氯仿法提取DNA ,应用复合扩增技术对D1S5 49等 6个短串重复序列 (STR)基因座... 详细信息

目的　探讨河南汉族群体的D1S5 49、D3S175 4、D2 2S683和CSF1PO、TPOX、TH0 1基因座遗传多态性分布。方法　ACD抗凝血样采自 2 19名无血缘关系汉族个体 ,酚氯仿法提取DNA ,应用复合扩增技术对D1S5 49等 6个短串重复序列 (STR)基因座进行扩增 ,采用高分辨率的聚丙烯酰胺凝胶电泳分离、银染法显影技术。统计各基因频率、计算杂合度、多态信息含量、个人识别概率及亲权否定概率。结果　 6个STR基因座基因频率的分布均符合Hardy Weinberg平衡 ,各基因座的杂合度分别为 0 .7964、0 .72 3 1、0 .815 9、0 .75 81、0 .65 2 3、0 .6816;非父排除概率为 0 .62 46、0 .4914、0 .65 0 1、0 .5 2 3 6、0 .40 98、0 .42 87;个人识别机率为 0 .8996、0 .8781、0 .92 3 1、0 .8896、0 .8167、0 .83 92 ;多态信息含量为 0 .72 16、0 .6994、0 .742 1、0 .7169、0 .65 17、0 .710 6。结论　D1S5 49等 6个STR基因座是一组高度多态性的遗传标记系统。

关键词：短串联重复序列遗传多态性聚合酶链反应基因座银染显带

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Angular Momentum Conserved Coherent State for an Electron in a Uniform Magnetic Field

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Chinese Physics Letters 1999年第10期16卷 706-708页

作者： fan Hong-yi ZOU hui fan Yue Department of Applied Physics Shanghai Jiao Tong UniversityShanghai 200030 Department of Materials Science and Engineering University of Science and Technology of ChinaHefei 230026 Department of Physics University of ArkansasFeyettvilleAR 72701 USA

For an electron in the uniform magnetic Held,we construct the angular momentum conserved coherent state||r^(2),l>,based on which we establish a new complete and orthonormal>is examined.

关键词： momentum Uniform angular

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