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A low-temperature synthesis-induced defect formation strategy for stable hierarchical porous metal–organic frameworks

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Chinese Chemical Letters 2019年第12期30卷 2309-2312页

作者： ge huang Yue Wang Tianfu Liu Fujian Institute of Research on the Structure of Matter State Key Laboratory of Structural ChemistryChinese Academy of SciencesFuzhou 350002China College of Biological and Chemical Engineering Chongqing University of EducationChongqing 400067China

A stable hierarchical porous metal-organic framework PCN-56 with abundant Lewis acid sites(denoted as Defective-PCN-56) was synthesized by the low-temperature synthesis-induced defect formation *** existence of mesopore in structure was confirmed by N2 sorption isotherm and the successful encapsulation of large dye *** Defective-PCN-56 has higher loading capacity toward anti-cancer drug Doxo compared with that of "nearly ideal-crystal"(denoted as Ideal-PCN-56)synthesized at high temperature,showing potential application as drug *** low-temperature synthesis-induced defect formation strategy presented here provides a new and facile way to synthesize stable MOFs with the combination of intrinsic micropore and additional mesopore as well as abundant Lewis acid sites.

关键词： Low-temperature induced Defect formation strategy Stable MOFs Hierarchical porous MOFs Lewis acid sites

Unseen head pose prediction using dense multivariate label distribution

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Frontiers of Information Technology & Electronic Engineering 2016年第6期17卷 516-526页

作者： Gao-li SANG Hu CHEN ge huang Qi-jun ZHAO State Key Laboratory of Fundamental Science on Synthetic Vision College of Computer ScienceSichuan University College of Mathematics and Information Engineering Jiaxing University

Accurate head poses are useful for many face-related tasks such as face recognition, gaze estimation,and emotion analysis. Most existing methods estimate head poses that are included in the training data(i.e.,previously seen head poses). To predict head poses that are not seen in the training data, some regression-based methods have been proposed. However, they focus on estimating continuous head pose angles, and thus do not systematically evaluate the performance on predicting unseen head poses. In this paper, we use a dense multivariate label distribution(MLD) to represent the pose angle of a face image. By incorporating both seen and unseen pose angles into MLD, the head pose predictor can estimate unseen head poses with an accuracy comparable to that of estimating seen head poses. On the Pointing'04 database, the mean absolute errors of results for yaw and pitch are 4.01?and 2.13?, respectively. In addition, experiments on the CAS-PEAL and CMU Multi-PIE databases show that the proposed dense MLD-based head pose estimation method can obtain the state-of-the-art performance when compared to some existing methods.

关键词： Head pose estimation Dense multivariate label distribution Sampling intervals Inconsistent labels

Effect of agitation on the characteristics of air dense medium fluidization

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International Journal of Mining Science and Technology 2016年第3期26卷 383-387页

作者： Wang Yanan Luo Zhenfu huang ge Ren Baojin School of Chemical Engineering and Technology China University of Mining & Technology

In order to study the effect of agitation on the characteristics of air dense medium fluidization, we designed and constructed an agitation device. Analyses were then conducted on the fluidization characteristics curves, the bed density stability and the average bubble rise velocity Uaunder different agitation conditions. The results indicated that a lower bed pressure drop(without considering lower gas velocity in a fixed bed stage) and higher minimum fluidized velocity are achieved with increasing agitation *** height d(distance between the lower blades and air distribution plate) at which the agitation paddle was located had a considerable effect on the stability of the bed density at 9.36 cm/s ge bubble rise velocity decreased significantly with increasing agitation speed under the operating condition of 1.50 cm/s < U–U_(mf)< 3.50 cm/s. This shows that appropriate agitation contributes to a significant improvement in the fluidization quality in a fluidized bed, and enhances the separation performance of a fluidized bed.

关键词： Agitation Fluidized bed Bed pressure drop Minimum fluidization velocity Bed density Bubble

Modeling agricultural non-point source pollution in a high-precipitation coastal area of China

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Frontiers of Environmental Science & Engineering 2014年第6期8卷 922-928页

作者： Zhiyi LI Pengfei DU Haiwei huang Yong ge Xu LI State Key Joint Laboratory of Environment Simulation and Pollution Control School of Enviromnent Tsinghua University Beijing 100084 China

Non-point source （NPS） pollution simulation in the high-precipitation coastal areas of China is difficult because varying annual typhoon incidence leads to highly contrasting rainfall patterns in dry years and wet years. An IMPULSE （Integrated Model of Non-point Sources Pollution Processes） based NPS model of the Changtan Reservoir watershed, which is a typical high-precipitation coastal area in China, was established based on the analysis of point and NPS pollution data, a digital elevation model, and data on land-use, soil, meteorology, economy, and agricultural management practice. Pre-processed pre-rain- fall soil moisture levels were introduced during the simulation to model the effects of typhoons on hydrology. Rainfall events were simulated sequentially through the year and the model was calibrated and verified using hydrological and water quality data. Accuracy of the simulated rainfall runoff and water quality in the Changtan watershed was found to be acceptable. The study showed that the NPS modeling system could be applied to the simulation and prediction ofNPS loadings in the Changtan Reservoir watershed.

关键词： Changtan Reservoir watershed non-point source pollution modeling pre-rainfall soil moisture model calibration

A Sulfonate-based Metal-organic Framework for the Transformation of CO and Epoxides into Cyclic Carbonates

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Chinese Journal of Structural Chemistry 2020年第11期39卷 2027-2032页

作者： XUE Huan LI Tao YIN Qi huang ge LIU Tian-Fu College of Chemistry and Materials Science Fujian Normal UniversityFuzhou 350007China State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China

An interesting metal-organic framework(MOF) PFC-31 was synthesized by a simple solvothermal reaction. X-ray crystallography reveals that PFC-31 crystallizes in monoclinic system, space group P21/c with a = 6.8410(17), b = 20.123(5), c = 7.689(2) ?, β = 104.239(7)°, V = 1026.0(5) ?3, Z = 2, C16 H22 CuN4 O8 S2, Mr = 526.03, μ = 1.322 mm-1, Dc = 1.703 g/cm3, F(000) = 542, GOOF = 1.214, R = 0.0975 and w R = 0.2324. According to X-ray analysis, PFC-31 shows one-dimensional chain constructed by Cu(Ⅱ) centers coordinating with two pyridine groups, two sulfonate groups and two DMF molecules. Owing to the orderly functionalized sulfonate group and Lewis metal sites, PFC-31 exhibits good catalytic capability for CO2 cycloaddition of epoxide under normal pressure and temperature.

关键词： metal-organic frameworks sulfonate group Lewis metal sites cycloaddition

Theoretical analysis of long-lived radioactive waste in pressurized water reactor

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Nuclear Science and Techniques 2021年第7期32卷 55-71页

作者： Ze-Xin Fang Meng Yu Ying-ge huang Jin-Bei Chen Jun Su Long Zhu Sino-French Institute of Nuclear Engineering and Technology Sun Yat-sen UniversityZhuhai 519082China

Background The accelerator-driven subcritical transmutation system(ADS)is an advanced technology for the harmless disposal of nuclear waste.A theoretical analysis of the ingredients and content of nuclear waste,particularly long-lived waste in a pressurized water reactor(PWR),will provide important information for future spent fuel *** The present study is an attempt to investigate the yields of isotopes in the neutron-induced fission process and estimate the content of long-lived ingredients of nuclear waste in a *** We combined an approximation of the mass distribution of five Gaussians with the most probable charge model(Zp model)to obtain the isotope yields in the^(235)U(n,f)and^(239)Pu(n,f)*** potential energy surface based on the concept of a di-nuclear system model was applied to an approximation using five Gaussian functions.A mathematical formula for the neutron spectrum in a PWR was established,and sets of differential equations were solved to calculate the content of long-lived nuclides in a *** The calculated isotopic fission yields were in good agreement with the experimental *** for 238U,the contents of^(239)Pu,^(240)Pu,^(241)Pu,^(242)Pu,^(237)Np,^(235)U,and^(236)U are predominant in the PWR after reaching a discharge *** addition,some isotope pairs of heavy nuclei reach a similar value after stabilization,which can be explained by the decay chain and effective fission *** fission fragments,we simulated the content evolution of some long-lived nuclides^(90)Sr,^(107)Pd,^(135)Cs,and their isobars^(90)Rb,^(107)Rh,and^(135)Xe during a fuel cycle in a *** variations in the inventories of uranium and plutonium were in good agreement with the data in Daya *** A new method is proposed for the prediction of the isotopic fission *** inventory of long-lived nuclides was analyzed and predicted after reaching a discharge burnup.

关键词： Radiotoxicity PWR Five Gaussians Long-lived nuclides Fissionfragmentsyields

Hugoniot equation of state of olivine and its geodynamic implications

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Science China Earth Sciences 2016年第3期59卷 619-625页

作者： huang Xiao ge YUAN Xian Hao CHEN Zu An LIU Fu Sheng BAI Wu Ming Key Laboratory of Earth and Planetary Physics Institute of Geology and Geophysics Chinese Academy of Sciences Institute of High Temperature and High Pressure Physics Key Laboratory of Advanced Technologies of Materials Ministry of Education of China Southwest Jiaotong University

Large olivine samples were hot-pressed synthesized for shock wave experiments. The shock wave experiments were carried out at pressure range between 11 and 42 GPa. Shock data on olivine sample yielded a linear relationship between shock wave velocity D and particle velocity u described by D=3.56(?0.13)+2.57(?0.12)u. The shock temperature is determined by an energy relationship which is approximately 790°C at pressure 28 GPa. Due to low temperature and short experimental duration, we suggest that no phase change occurred in our sample below 30 GPa and olivine persisted well beyond its equilibrium boundary in metastable phase. The densities of metastable olivine are in agreement with the results of static compression. At the depth shallower than 410 km, the densities of metastable olivine are higher than those of the PREM model, facilitating cold slab to sink into the mantle transition zone. However, in entire mantle transition zone, the shock densities are lower than those of the PREM model, hampering cold slab to flow across the "660 km" phase boundary.

关键词： Hugonite density Shock temperature Olivine Mantle transition zone

Chirped Fiber Bragg Gratings for Optieal Fiber Dispersion Compensation

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Chinese Physics Letters 1996年第11期13卷 848-850页

作者： CHEN gen-xiang LI Xun YANG Ling JIAN Shui-sheng ge huang WANG Wei Institute of Lightwave Technology Northern Jiaotong UniversityBeijing 100044 Department of Electronical and Computer Engineering University of WaterlooWaterlooOntarioCanada N2L 3G1 National Research Center for Optoelectronics Technology Institute of SemiconductorChinese Academy of SciencesBeijing 100083

The use of α-power chirped fiber Bragg gratings for dispersion Cancellation in an optical fiber link is *** and theoretical investigation of recompressing the dispersion-broadened pulse by usingα-power chirped gratings is made,which shows that,the dispersion-broadened Gaussian pulse after l00km standard fiber(with zero dispersion atλ=1.3μm)trnasmission atλ=1.55μm with initial width of T_(FWHM)=33ps(full width at half maximum)can be perfectly recompressed with the peak reflectivity of 82%by using a 30mm longα-power chirped fiber grating with properαvalue and optimal grating parameters.

关键词： fiber pulse dispersion

Prediction of(n,2n)reaction cross-sections of long-lived fission products based on tensor model

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Nuclear Science and Techniques 2024年第10期35卷 208-221页

作者： Jia-Li huang Hui Wang Ying-ge huang Er-Xi Xiao Yu-Jie Feng Xin Lei Fu-Chang Gu Long Zhu Yong-Jing Chen Jun Su Sino-French Institute of Nuclear Engineering and Technology Sun Yat-sen UniversityZhuhai 519082China China Nuclear Data Center China Institute of Atomic EnergyBeijing 102413China Key Laboratory of Nuclear Data China Institute of Atomic EnergyBeijing 102413China

Interest has recently emerged in potential applications of(n,2n)reactions of unstable *** have arisen because of the scarcity of experimental cross-sectional *** study aims to predict the(n,2n)reaction cross-section of long-lived fission products based on a tensor *** tensor model is an extension of the collaborative filtering algorithm used for nuclear *** is based on tensor decomposition and completion to predict(n,2n)reaction cross-sections;the corresponding EXFOR data are applied as training *** reliability of the proposed tensor model was validated by comparing the calculations with data from EXFOR and different *** were made for long-lived fission products such as^(60)Co,^(79)Se,^(93)Zr,^(107)P,^(126)Sn,and^(137)Cs,which provide a predicted energy range to effectively transmute long-lived fission products into shorter-lived or less radioactive *** method could be a powerful tool for completing(n,2n)reaction cross-sectional data and shows the possibility of selective transmutation of nuclear waste.

关键词： (n,2n)Reaction cross-section Tensor model Machine learning Collaborative filtering algorithm Selective transmutation