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Crystal Structure of a Linear Ag(I) Complex with Niflumic Acid and Its Fluorescent Property

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Chinese Journal of Structural Chemistry 2006年第11期25卷 1387-1391页

作者： TAN Yu-Hui YANG shao-ping LI Qing-Song TAN Yu-Li Department qf Pharmacy Gannan Medical University Ganzhou Jiangxi 341000 China Tianxin Hospital of Zhuzhou Zhuzou Hzman 412001 China

A novel Ag（1） complex AgH（Nifa）2 1 （C26H17AgF6N4O4, Mr = 671.31） was synthesized through hydrothermal reaction of Ag2SO4 and Niflumic acid （HNifa）, and characterized by single-crystal X-ray determination, IR and fluorescent spectra. Crystal data for 1： monoclinic, space group C2/c, with a = 9.5446（16）, b = 12.3203（16）, c = 21.056 （3） A, β = 98.075（2）°, V= 2451.5（6） A^3, T = 293（2） K, Z = 4, D,. = 1.819 g/cm^3, F（000） = 1336,μ = 0.912 mm^-1, S = 1.001, （△ρ）min = 0.849, the final R = 0.0391 and wR = 0.1286. The local geometry around the central metal AgO） ion is linear. Two carboxylic acids of neighboring ligands sharing one hydrogen atom by two hydrogen bonds result in the formation of an infinite hydrogen-bonded chain. Solid-state fluorescence of I at room temperature shows that the maximal emission peak occurs in 439 nm.

关键词： niflumic acid silver(Ⅰ) complex hydrothermal synthesis fluorescence

Color retargeting:Interactive time-varying color image composition from time-lapse sequences

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Computational Visual Media 2015年第4期1卷 321-330页

作者： shao-ping Lu Guillaume Dauphin Gauthier Lafruit Adrian Munteanu Department of Electronics and Informatics(ETRO) Vrije Universiteit Brussel (VUB) and iMinds Department of LISA unit ImageUniversité Libre de Bruxelles(ULB)

In this paper,we present an interactive static image composition approach,namely color retargeting,to flexibly represent time-varying color editing effect based on time-lapse video *** of performing precise image matting or blending techniques,our approach treats the color composition as a pixel-level resampling problem. In order to both satisfy the user's editing requirements and avoid visual artifacts,we construct a globally optimized interpolation field. This field defines from which input video frames the output pixels should be *** proposed resampling solution ensures that(i) the global color transition in the output image is as smooth as possible,(ii) the desired colors/objects specified by the user from different video frames are well preserved,and(iii) additional local color transition directions in the image space assigned by the user are also *** examples have been shown to demonstrate that our efficient solution enables the user to easily create time-varying color image composition results.

关键词： time-lapse sequence image composition color retargeting time-varying transition optimized interpolation field

Preparation of TiAl alloy powder by high-energy ball milling and diffusion reaction at low temperature

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Rare Metals 2018年第1期37卷 21-25页

作者： Hui-ping shao Zhi Wang Tao Lin Qing Ye Zhi-Meng Guo Institute for Advanced Material and Technology University of Science and Technology Beijing

In this paper, TiAl alloy powders were prepared successfully by high-energy ball milling and diffusion reaction in vacuum at low temperature. The titanium powder, aluminum powder, and titanium hydride powder were used as raw materials. The samples were characterized by scanning electron microscopy（SEM）, X-ray diffraction（XRD）, field-emission scanning electron microscopy（FESEM）, and differential thermal analysis（DTA）. The results show that the alloy powders with the main intermetallic compounds of TiAl are obtained using Ti-Al powders and TiH2-Al powders after heated for 2 h at 500 ℃,3 h at 600 ℃,and 3 h at 750 ℃,*** average grain sizes of alloy powder are about 45 and20 μm with irregular shape, respectively. The prepared TiAl alloy powders are relatively pure, and the average quality content of oxygen in the alloy powders is0.33 wt%. The forming process of alloy powder contains both the diffusion reaction of Ti and Al,which gives priority to the diffusion reaction of aluminum.

关键词： High-energy ball milling Titanium hydride powder Titanium powder TiAl alloy powder Diffusion reaction

High-sensitivity intelligent packaging films harnessing rose anthocyanins and hydrophilic silica aerogel for visual food freshness monitoring

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Food Quality and Safety 2024年第1期8卷 179-189页

作者： Wenjun Wu Luman Zheng Jiahao Yu Liming Liu Gulden Goksen ping shao Department of Food Science and Technology Zhejiang University of TechnologyZhejiangHangzhouChina Department of Food Technology Vocational School of Technical Sciences at Mersin Tarsus Organized Industrial ZoneTarsus UniversityMersinTurkey Eco-Industrial Innovation Institute ZJUT Zhejiang University of TechnologyZhejiangQuzhouChina

The enhancement of the sensitivity for anthocyanin-based indicator films in food freshness monitoring in real time is important for *** this study,hydrophilic silica aerogel(SiO2 NA)was incorporated into corn starch(CS)/chitosan(CH)/rose anthocyanins(RACNs)-encapsulated potato amylopectin nanoparticles(APNPs)composite film to increase the sensitivity for shrimp freshness *** microstructure of films revealed that the gas absorption capacity was improved by amorphous SiO2 NA via hydrogen *** pore size(1.74–5.60 times),pore volume(3.92–5.60 times),and specific surface area(2.21–2.34 times)of films increased with the addition of SiO2 *** sensing of NH3 and pH and the reversibility of films were also ***,the pH-responsive films containing SiO2 NA changed visibly in color from purple–red to orange–gray and finally to gray,enabling effective monitoring of shrimp freshness during storage at 4°***,anthocyanin-based indicator films with improved sensitivity by adding SiO2 NA were successfully designed for monitoring shrimp freshness.

关键词： Hydrophilic silica aerogel anthocyanins sensitivity pH-responsive shrimp freshness intelligent packaging

Off-farm employment and poverty alleviation in rural China

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Journal of Integrative Agriculture 2021年第4期20卷 943-952页

作者： LI shao-ping DONG Yong-qing ZHANG Lin-xiu LIU Cheng-fang China Center for Agricultural Policy School of Advanced Agricultural SciencesPeking UniversityBeijing 100871P.R.China College of Management and Economics/Center for Social Science Survey and Data Tianjin UniversityTianjin 300072P.R.China UN Environment Programme-International Ecosystem Management Partnership Beijing 100101P.R.China Key Laboratory of Ecosystem Network Observation and Modelling Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101P.R.China

Two phenomena in the history of China's economic growth during the last four decades are the increase in the share of offfarm employment and the progress in poverty alleviation in rural *** both of them have been well documented in the literature,less is known about the linkage between the *** better understand the role that off-farm employment has played in poverty alleviation in rural China is critically important not only for China but also for those countries that are trying to reduce ***,we examine the impact of off-farm employment on poverty alleviation in rural *** the data from two nationally representative household panel surveys(China National Rural Survey and China Rural Development Survey),this paper provides supporting evidence that off-farm employment contributes to poverty alleviation in rural ***,if household participation in off-farm employment increases by 10 percentage points,the likelihood for a nonpoor household to fall into poverty will decrease by 0.88 percentage point whereas the likelihood for a poor household to climb out of poverty will increase by 3.5 percentage *** a word,off-employment can not only prevent rural residents to fall into poverty but also help those already in poverty climb out of it.

关键词： off-farm employment poverty alleviation rural China

Low-Frequency Vibrations of Indole Derivatives by Terahertz Time-Domain Spectroscopy

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Journal of Electronic Science and Technology 2016年第4期14卷 329-336页

作者： Ya-Ru Dang shao-ping Li Hui Liu shao-Xian Li Jian-Bing Zhang Hong-Wei Zhao School of Chemical Engineering East China University of Science and TechnologyShanghai200237China School of Precision Instrument and Optoelectronics Engineering Tianjin UniversityTianjin 300072China Key Laboratory of Interfacial Physics and Technology Shanghai Institute of Applied PhysicsChinese Academy of SciencesShanghai 201800China

Several indole derivatives with different ＇3-＇ substituents have been investigated by terahertz （THz） time-domain spectroscopy. The low-frequency absorption spectra and refractive indices were obtained in the range of 0.2 THz to 2.5 THz （7 cm-1 to 83 cm-1）. These derivatives with different substituents present distinct features, which suggests that THz spectroscopy is sensitive to different structures and components of these chemicals. The density functional theory was employed to calculate the low-frequency vibrational properties of indole-3-carboxylic acid and indole-3-propionic acid based on their crystal structures, and the intermolecular interactions were involved. Meanwhile, the temperature dependence of the spectra agreed with the calculated results. The quantitative analysis of a ternary mixture was studied by taking the THz fingerprints into account, and the results demonstrate THz spectroscopy has great potential for the practical applications in biochemistry and pharmaceutics.

关键词： Characteristic spectrum density functional theory indole derivatives low-frequency vibration terahertz.

Axisymmetric Waves in Isothermal Accretion Discs with Vertical Self-Gravity

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Communications in Theoretical Physics 2001年第12期36卷 743-748页

作者： LIU Xiao-Ci YANG Lan-Tian WU shao-ping DING Shi-Xue Department of Physics Hainan Normal College Haikou 571158 Hainan Province Chinat Department of Physics and Institute of Astrophysics Huazhong Normal University Wuhan 430079 China Department of Physics and Institute of Astrophysics Huazhong Normal University Wuhan 430079 China Department of Physics and Institute of Astrophysics Huazhong Normal University Wuhan 430079 China Department of Physics and Institute of Astrophysics Huazhong Normal University Wuhan 430079 China Department of Physics Xiangfan Normal College Xiangfan 441053 Hubei Province China

We extend the research of axisymmetric waves in accretion discs with three-dimensional structure to the case that vertical self-gravity of the discs is included. We derive and analyze the dispersion relation and solve the eigenfunctions numerically. The following results have been reached: vertical self-gravity expands the forbidden region of the wave propagation. As the influence of the vertical self-gravity increases, the group velocities of the waves get smaller and the vertical nodes of the wave shrink to the middle plane of the disc.

关键词： accretion, accretion discs, hydrodynamics, waves

Short-term use of antiepileptic drugs is neurotoxic to the immature brain

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Neural Regeneration Research 2015年第4期10卷 599-604页

作者： Yu Liu Xue-ying Wang Dan Li Lin Yang shao-ping Huang Department of Pediatrics the Second Affiliated Hospital of Xi’an Jiaotong University

Previous studies have shown that the long-term use of antiepileptic drugs can cause nervous system damage. However, short-term antiepileptic drug treatment is frequently given to in-fants, especially neonates, to control seizure. Whether the short-term use of antiepileptic drugs is neurotoxic remains unclear. In the present study, immature rats, 3–21 days of age, were intraperitoneally injected with phenobarbital and/or topiramate for 3 consecutive days. Hema-toxylin-eosin and immunohistochemical staining revealed that phenobarbital and topiramate, individually or in combination, were cytotoxic to hippocampal CA1 neurons and inhibited the expression of GluR1 and NR2B, excitatory glutamate receptor subunits. Furthermore, the com-bination of the two drugs caused greater damage than either drug alone. The results demonstrate that the short-term use of antiepileptic drugs damages neurons in the immature brain and that the combined use of antiepileptic drugs exacerbates damage. Our ifndings suggest that clinicians should consider the potential neurotoxic risk associated with the combined use of antiepileptic drugs in the treatment of seizure.

关键词： nerve regeneration seizure antiepileptic drugs immature brain hippocampus synaptic plasticity glutamate receptor NSFC grant neural regeneration

Geometry-Aware ICP for Scene Reconstruction from RGB-D Camera

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Journal of Computer Science & Technology 2019年第3期34卷 581-593页

作者： Bo Ren Jia-Cheng Wu Ya-Lei Lv Ming-Ming Cheng shao-ping Lu College of Computer Science Nankai UniversityTianjin 300350China

The Iterative Closest Point (ICP) scheme has been widely used for the registration of surfaces and point ***, when working on depth image sequences where there are large geometric planes with small (or even without) details,existing ICP algorithms are prone to tangential drifting and erroneous rotational estimations due to input device *** this paper, we propose a novel ICP algorithm that aims to overcome such drawbacks, and provides significantly stabler registration estimation for simultaneous localization and mapping (SLAM) tasks on RGB-D camera inputs. In our approach,the tangential drifting and the rotational estimation error are reduced by: 1) updating the conventional Euclidean distance term with the local geometry information, and 2) introducing a new camera stabilization term that prevents improper camera movement in the calculation. Our approach is simple, fast, effective, and is readily integratable with previous ICP algorithms. We test our new method with the TUM RGB-D SLAM dataset on state-of-the-art real-time 3D dense reconstruction platforms, i.e., ElasticFusion and Kintinuous. Experiments show that our new strategy outperforms all previous ones on various RGB-D data sequences under different combinations of registration systems and solutions.

关键词： ICP(iterative closest point) RGB-D tangential drifting rotational estimation covariance matrix