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Preparation,crystal structure and quantum chemical investigation of[Li(NTO) (H_2O)_2]

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Chinese Science Bulletin 1999年第3期44卷 214-218页

作者： SONG Jirong , CHEN Zhaoxu , XIAO Heming , HU Rongzu and LI Fuping Department of Chemical Engineering, Northwest University, Xi’ an 710069, China Department of Chemistry, Nanjing University of Science and Technology, Nanjing 210094, China Xi’an Modern Chemistry research institute, Xi’ an 710065, China Department of Chemical Engineering Northwest University Xi’an China Department of Chemistry Nanjing University of Science and Technology Nanjing China Xi’an Modern Chemistry research institute Xi’an China

[Li（NTO）(H2O2]was prepared by mixing the aqueous solution of 3-nitro-1,2,4-triazol-5-one （NTO） and lithium hydroxide. The crystal structure of [Li（NTO）（H2O）2] was determined by single crystal diffraction analysis. The crystal is monoclinic, space group P21/n with crystal parameters of α =0.7420（2） nm, b=0.344 9（1） nm, c=2.490 6（3） nm,β=94.89（1）°, Z=4, Dc=1.799 ***-3, V=0.635 nm3,μ= 1.591 cm-1, F（000） = 392. The final R is 0.051. The MNDO MO calculation shows that the coordinate bonds of title compound possess certain extent of covalent character. O2 atom of NTO anion is bonded to Li atom; the nitro group will be lost first when NTO is decomposed.

关键词： NTO lithium coordination crystal structure MNDO MO method.

First application of plutonium in soil erosion research on terraces

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Nuclear Science and Techniques 2023年第4期34卷 41-53页

作者： Yong-Jing Guan Wu Chen Shen-Zhen Wang Yu-Xin Hua Qiao-Yan Jing Zhi-Yong Liu Chun-Ping Huang De-Yu Wang Hui-Juan Wang Xian-Wen He Mario De Cesare Liang-Jia Cui Hua He Kai-Di Fan Zi-Chen Guo Guangxi Key Laboratory for Relativistic astrophysics School of Physical Science and TechnologyGuangxi UniversityNanning 530004China State Key Laboratory of Radiation Medicine and Protection School for Radiological and Interdisciplinary Sciences(RAD-X)and Collaborative Innovation Centre of Radiation Medicine of Jiangsu Higher Education InstitutionsSoochow UniversitySuzhou 215123China Radiation-Environment Management and Monitoring Station of Guangxi Zhuang Autonomous Region Nanning 530222China Department of Large Ground Testing Facilities CIRA-Italian Aerospace Research Centre81043 CapuaItaly Department of Mathematics and Physics University of Campania“Luigi Vanvitelli”81100 CasertaItaly INFN-National institute for Nuclear Physics Naples Section80126 NaplesItaly

The spatial distributions of ^(239+240)Pu and ^(137)Cs in soils from Longji Rice Terraces were investigated to evaluate soil *** activity concentrations of ^(239+240)Pu and ^(137)Cs in the surface soils of the paddy fields were in the range of 0.089–0.734 and1.80–7.88 mBq/g,*** activities of ^(239+240)Pu and ^(137)Cs showed very similar distribution trends,first increasing and then decreasing with increasing *** 240Pu/239Pu atom ratios in the surface soils ranged from 0.162 to *** activities of ^(239+240)Pu and ^(137)Cs in the soil cores tended to be uniformly distributed within the plowed layer and declined exponentially below this *** mean soil erosion rates of Longji Rice Terraces estimated by ^(239+240)Pu and ^(137)Cs tracer methods were 5.44 t/(ha·a)and 5.16 t/(ha·a),respectively,which demonstrated that plutonium can replace ^(137)Cs as an ideal tracer for soil erosion research in the *** features are the main factors affecting the distribution of plutonium and ^(137)Cs as well as soil erosion in the Longji Rice Terraces.

关键词： Soil erosion Plutonium ^(137)Cs Tracer method Terraces

Dynamic visual simulation of marine vector field based on LIC——a case study of surface wave field in typhoon condition

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Journal of Oceanology and Limnology 2019年第6期37卷 2025-2036页

作者： LIU Zhendong LIU Haixing SU Tianyun JIA Zhen LI Xinfang ZHOU Lin SONG Zhuanling First institute of Oceanography(FIO) Ministry of Natural Resources(MNR)Qingdao 266061China Laboratory for Regional Oceanography and Numerical Modelling Qingdao National Laboratory for Marine Science and TechnologyQingdao 266237China National Engineering Laboratory for Integrated Aero-space-Ground-Ocean Big Data Application Technology Qingdao 266061China

Line integral convolution(LIC)is a useful visualization technique for a vector ***,the output image produced by LIC has many problems in a marine vector *** focus on the visual quality improvement when LIC is applied in the ocean steady and unsteady flow field in the following *** a white noise is used as the input in a steady flow field,interpolation is used to turn the discrete white noise into continuous white noise to solve the problem of ***"cross"high-pass filtering is used to enhance the textures of streamlines to be more concentrated and continuity strengthened for each *** a sparse noise is used as the input in a steady flow field,we change the directions of background sparse noise according to the directions of vector field to make the streamlines clearer and *** addition,we provide a random initial phase for every streamline to avoid the pulsation effect during *** velocities of vector field are encoded in the speed of the same length streamlines so that the running speed of streamlines can express flow ***,to solve the problem of obvious boundaries when stitching image,we change the streamline tracking *** a white noise is used as an input in an unsteady flow field,double value scattering is used to enhance the contrast of streamlines;moreover,the"cross"high-pass filtering is also adopt instead of two-dimensional high-pass ***,we apply the above methods to a case of the surface wave field in typhoon *** experimental results show that applying the methods can generate high-quality wave images and ***,it is helpful to understand and study waves in typhoon condition to avoid the potential harm of the waves to people's lives and property.

关键词： line integral convolution(LIC) wave data visualization steady and unsteady marine flow field

The conformity of HI galaxies in ALFALFA-SDSS sample

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research in Astronomy and astrophysics 2021年第2期21卷 61-67页

作者： Lin-Cheng Li Bo Qin Jie Wang Jing Wang You-Gang Wang National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China School of Astronomy and space Science University of Chinese Academy of SciencesBeijing 100049China International Centre for Radio Astronomy research(ICRAR) The University of Western Australia35 Stirling HwyCrawleyWA6009Australia Department of Astronomy Peking UniversityBeijing 100871China

The conformity effect,indicating the evolution of galaxies is related to its surrounding neighbor galaxies as far as a few Mpc,is an interesting phenomenon in the modeling of galaxy and *** we study the conformity effect of HI galaxies in a matched galaxy sample between SDSS DR7 and ALFALFA *** checking the probability difference for the detected H i galaxies as a function of distance around a normal or an H i galaxy,we find that this effect is significant out to 5 *** also shows a dependence on the stellar mass of galaxies,with the strength the strongest in the stellar mass range of 10^(10)

关键词： method data analysis-radio lines galaxies-galaxies evolution

Extracting useful high-frequency information from wide-field electromagnetic data using time-domain signal reconstruction

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Journal of Central South University 2022年第11期29卷 3767-3778页

作者： LING Fan YANG Yang LI Gang ZHOU Chang-yu HUANG Min WANG Xin ZHANG Heng ZHU Yu-zhen SUN Huai-feng School of Geosciences and Info-Physics Central South UniversityChangsha 410083China Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring of Ministry of Education(Central South University) Changsha 410083China Geotechnical and Structural Engineering research Center Shandong UniversityJinan 250000China Advanced Exploration and Transparent City Innovation Center Shandong Research Institute of Industrial TechnologyJinan 250101China Jinan Rail Transit Group Co. Ltd.Jinan 250101China institute of Urban Underground space and Energy Studies the Chinese University of Hong KongShenzhen 518000China Shandong Coal Geological Planning and Exploration research institute Jinan 250000China

The wide-field electromagnetic method is widely used in hydrocarbon exploration,mineral deposit detection,and geological disaster ***,apparent resistivity and normalized field amplitude exceeding 2048 Hz often exhibit upward warping in data,making geophysical inversion and interpretation *** cumulative error of the crystal oscillator in signal transmission and acquisition contributes to an upturned apparent resistivity *** address this,a high-frequency information extraction method is proposed based on time-domain signal reconstruction,which helps to record a complete current data sequence;moreover,it helps estimate the crystal oscillator error for the transmitted *** the recorded error,a received signal was corrected using a set of reconstruction *** processing,the high-frequency component of the wide-field electromagnetic data was not upturned,while accurate high-frequency information was extracted from the ***,the proposed method helped effectively extract high-frequency components of all wide-field electromagnetic data.

关键词： wide-field electromagnetic method crystal oscillator error time series signal resampling signal reconstruction

GRAMO:geometric resampling augmentation for monocular 3D object detection

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Frontiers of Computer Science 2024年第5期18卷 161-169页

作者： He GUAN Chunfeng SONG Zhaoxiang ZHANG School of Artificial Intelligence University of Chinese Academy of SciencesBeijing 100049China Center for research on Intelligent Perception and Computing State Key Laboratory of Multimodal Artificial Intelligence SystemsInstitute of Automation Chinese Academy of SciencesBeijing 100190China

Data augmentation is widely recognized as an effective means of bolstering model ***,when applied to monocular 3D object detection,non-geometric image augmentation neglects the critical link between the image and physical space,resulting in the semantic collapse of the extended *** address this issue,we propose two geometric-level data augmentation operators named Geometric-Copy-Paste(Geo-CP)and Geometric-Crop-Shrink(Geo-CS).Both operators introduce geometric consistency based on the principle of perspective projection,complementing the options available for data augmentation in monocular ***,Geo-CP replicates local patches by reordering object depths to mitigate perspective occlusion conflicts,and Geo-CS re-crops local patches for simultaneous scaling of distance and scale to unify appearance and *** operations ameliorate the problem of class imbalance in the monocular paradigm by increasing the quantity and distribution of geometrically consistent *** demonstrate that our geometric-level augmentation operators effectively improve robustness and performance in the KITTI and Waymo monocular 3D detection benchmarks.

关键词： 3D detection monocular augmentation geometry

Preparation, Structure, Photoluminescence and Energy Transfer Mechanism of a Novel Holmium Complex

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Chinese Journal of Structural Chemistry 2019年第3期38卷 337-344页

作者： KUANG Han-Mao ZHANG Zhuan-Xia LIN Long-Zhen CHEN Hua-Long CHEN Wen-Tong institute of Applied Chemistry School of Chemistry and Chemical Engineering Jiangxi Province Key Laboratory of Coordination Chemistry Jinggangshan University State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Key Laboratory of Jiangxi Province for Persistant Pollutants Control and Resources Recycle (Nanchang Hangkong University)

A novel holmium complex [Ho(HIA)_2(H_2O)_4(NO_3)](NO_3)_2(1, HIA = isonicotinic acid) has been synthesized through hydrothermal reactions and characterized by single-crystal X-ray diffraction. Complex 1 crystallizes in the C2/c space group of monoclinic system: a = 14.4797(7), b = 12.4768(2), c = 13.3471(5) ?, β = 118.690(4)°, V = 2115.26(13) ?~3, C_(12)H_(16)HoN_5O_(17), Mr = 667.23, Z = 4, Dc = 2.095 g/cm^3, μ(Mo Kα) = 3.838 mm^(–1) and F(000) = 1304. The crystal structure of 1 is characterized by an isolated structure. Solid-state photoluminescence experiment uncovers that it shows yellow light emission. The emission bands are originated from the characteristic emission of the 4 f electrons intrashell transition of the ~5S_2 → ~5I_8 and ~5F_5 → ~5I_8 of the Ho^(3+) ions. Energy transfer mechanism is explained by the energy level diagram of the Ho3+ ion and the isonicotinic acid ligand. It has remarkable CIE chromaticity coordinates of(0.4929, 0.4632), so it may be a promising color converter for lighting and displays.

关键词： crystal, CIE energy transfer mechanism holmium photoluminescence

Effect of Shale Reservoir Characteristics on Shale Oil Movability in the Lower Third Member of the Shahejie Formation, Zhanhua Sag

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Acta Geologica Sinica(English Edition) 2020年第2期94卷 352-363页

作者： NING Chuanxiang MA Zhongliang JIANG Zhenxue SU Siyuan LI Tingwei ZHENG Lunju WANG Guozhen LI Fengxun State Key Laboratory of Shale Oil and Gas Enrichment and Effective Development Wuxi 214126.JiangsuChina Wuxi research institute of Petroleum GeologySinopec Exploration and Production research institute Wuxi 214126JiangsuChina Unconventional Natural Gas institute China University of PetroleumBeijing 102249China College of Earth Science.Jilin University Changchun 130012China Shandong Provincial Key Laboratory of Depositional Mineralization & Sedimentary Mineral Shandong University of Science and TechnologyQingdao 266590China Gas Hydrate Engineering Technology Center Guangzhou Marine Geological SurveyGuangzhou 510075China

To reveal the effect of shale reservoir characteristics on the movability of shale oil and its action mechanism in the lower third member of the Shahejie Formation(Es3l), samples with different features were selected and analyzed using N2 adsorption, high-pressure mercury injection capillary pressure(MICP), nuclear magnetic resonance(NMR), high-speed centrifugation, and displacement image techniques. The results show that shale pore structure characteristics control shale oil movability directly. Movable oil saturation has a positive relationship with pore volume for radius > 2 μm, as larger pores often have higher movable oil saturation, indicating that movable oil is present in relatively larger pores. The main reasons for this are as follows. The relatively smaller pores often have oil-wetting properties because of organic matter, which has an unfavorable effect on the flow of oil, while the relatively larger pores are often wetted by water, which is helpful to shale oil movability. The rich surface provided by the relatively smaller pores is beneficial to the adsorption of immovable oil. Meanwhile, the relatively larger pores create significant pore volume for movable oil. Moreover, the larger pores often have good pore connectivity. Pores and fractures are interconnected to form a complex fracture network, which provides a good permeability channel for shale oil flow. The smaller pores are mostly distributed separately;thus, they are not conducive to the flow of shale oil. The mineral composition and fabric macroscopically affect the movability of shale oil. Calcite plays an active role in shale oil movability by increasing the brittleness of shale and is more likely to form micro-cracks under the same stress background. Clay does not utilize shale oil flow because of its large specific surface area and its block effect. The bedding structure increases the large-scale storage space and improves the connectivity of pores at different scales, which is conducive t

关键词： shale oil movability shale reservoirs pore structure characteristics lower third member of the Shahejie Formation

Faster than the Speed of Light Is a Quantum Phenomena

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Journal of High Energy Physics, Gravitation and Cosmology 2023年第2期9卷 379-382页

作者： Ardeshir Irani The Dark Energy research institute Downey USA

Classical Mechanics using Einstein’s theories of relativity places a limit on speed as the speed of light. Quantum Mechanics has no such limitation. To understand space accelerating faster than the speed of light and information being exchanged instantaneously between two entangled electrons separated by huge distances, one uses Planck’s length, Planck’s time, and Planck’s mass to indicate that space and time are discrete and therefore along with masses smaller than Planck’s mass are Quantum Mechanical in nature. Faster than the speed of light c = 3 × 108 m/s is a classical effect only in dimensions of space lower than our 3-D Universe, but it is a Quantum effect in all dimensions of space. Because space can oscillate sending out ripples from the source, it is the medium used for transporting light waves and gravity waves.

关键词： Faster than the Speed of Light Classical Quantum Planck’s Units space as a Medium Comparison with String Theory