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Nano Research 2014年第11期7卷 1592-1603页

作者： Chenfu chuang Shaoliang cheng Department of Chemical and Materials Engineering Central University Chung-Li City Taoyuan 32001

In this study, we reported the design, fabrication, and characterization of well- ordered arrays of vertically-aligned, epitaxial NiSi2/Si heterostructures and single- crystalline NiSi2 nanowires on （001）Si substrates. The epitaxial NiSi2 with {111} facets was found to be the first and the only silicide phase formed inside the Si nanowires after annealing at a temperature as low as 300℃. Upon annealing at 500 ℃ for 4 h, the residual parts of Si nanowires were completely consumed and the NiSi2/Si heterostructured nanowires were transformed to fully silicided NiSi2 nanowires. XRD, TEM and SAED analyses indicated that all the NiSi2 nanowires were single crystalline and their axial orientations were parallel to the [001] direction. The obtained vertically-aligned NiSi2 nanowires, owing to their well-ordered arrangement, single-crystalline structure, and low effective work function, exhibit excellent field-emission properties with a very low turn-on field of 1.1 V/m. The surface wettability of the nanowires was found to switch from hydrophobic to hydrophilic after the formation of NiSi2 phase and the measured water contact angle decreased with increasing extent of Ni silicidation. The increased hydrophilicity can be explained by the Wenzel model. The obtained results present the exciting prospect that the new approach proposed here will provide the capability to fabricate other highly-ordered, vertically-aligned fully silicided nanowire arrays and may offer potential applications in constructing vertical silicide-based nanodevices.

关键词： nanosphere lithography Si nanowire NiSi2 nanowire field emission wettability

Imaging the rupture process of the 10 January 2018 Mw7.5 Swan island, Honduras earthquake

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Earthquake Science 2020年第4期33卷 194-200页

作者： chuang cheng Dun Wang School of Earth Sciences China University of GeosciencesWuhan 430074China

The 10 January 2018 Mw7.5 Swan island,Honduras earthquake occurred on the Swan island fault,which is a transform plate boundary between the North American and Caribbean *** we back-project the rupture process of the earthquake using dense seismic stations in Alaska,and find that the earthquake ruptured at least three faults(three stages)for a duration of~40 *** rupture speed for the longest fault(stage 3)is as fast as 5 km/s,which is much faster than the local shear wave velocity of~4 km/*** rupture was incidentally observed on long and straight strike-slip *** study shows a supershear rupture that occured on a strike-slip fault with moderate length,implying that supershear rupture might commonly occur on large strike-slip *** common occurrence of supershear rupture on strike-slip earthquakes will challenge present understanding of crack physics,as well as strong ground motion evaluation in earthquake engineering.

关键词： 2018 Mw7.5 Honduras earthquake source process back-projection rupture speed supershear rupture

A novel energetic framework with the combination of 5,6-fused triazolo-triazine and nitropyrazole-tetrazole for energy-stability balanced explosive

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Defence Technology（防务技术） 2023年第9期27卷 184-192页

作者： cheng-chuang Li Hao Gu Jie Tang Guo-jie Zhang Guang-bin cheng Hong-wei Yang School of Chemistry and Chemical Engineering Nanjing University of Science and TechnologyNanjing210094China

In recent years,the introduction of fused rings own high density and low sensitivity has promoted the development of energetic ***,the development of energetic compounds containing fused and bridged rings by introducing multiple nitrogen heterocycles at different sites of fused rings is still difficult to progress,which seriously limits the emergence of advanced energetic *** this study,a series of energetic materials choosing different nitrogen rich heterocycles at the vacancies of the fused ring,i.e.,neutral compound 5,6 and their ionic derivatives(compounds 7-12)were designed and *** 5 and 6 were further confirmed by single crystal X-ray diffraction,while the crystal analysis and theoretical calculations were carried out to explore the relationship between crystal structure and physicochemical *** of the newly synthesized compounds(5-12)are insensitive to mechanical stimulation(IS>40 J;FS≥342 N)and they own the high detonation velocity(D:8322-9075 m/s).Notably,hydrazine salt 11 own the higher detonation velocity(9075 m/s)and powder density(1.83 g/cm^(3)),but exhibits lower sensitivity(IS>40 J)than the classical energetic compound RDX(8795 m/s,1.80 g/cm^(3),7.5 J).It is obvious that the combination of 5,6-fused triazolo-triazine and nitropyrazole-tetrazole may be a new energetic skeleton for synthesising the heterocyclic compounds with balanced energy-stability.

关键词： Fused and bridged rings Energetic skeleton Balanced energy-stability Energetic materials

Divalent nitrogen-rich cationic salts with great gas production capacities

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Defence Technology（防务技术） 2023年第4期22卷 54-68页

作者： Hao Gu cheng-chuang Li Chang-hao Dai Dong-xu Chen Hong-wei Yang Guang-bin cheng School of Chemistry and Chemical Engineering Nanjing University of Science and TechnologyXiaolingwei 200Nanjing210094PR China

Monocyclic nitrogen-rich 3-(aminomethyl)-4,5-diamine-1,2,4-triazole(1)and fused cyclic 3,7-diamine-6-(aminomethyl)-[1,2,4]triazolo[4,3-b][1,2,4]triazole(9)were synthesized through the convenient cyclization reaction from the readily available *** energetic salts with high nitrogen content were proved to be rare examples of divalent monocyclic/fused cyclic cationic salts according to the single crystal *** structure of intermediate B was also identified and verified by its trivalent cation crystal 17.5H_2O *** compounds 2-8 and 10-17 were fully characterized by NMR spectroscopy,infrared spectroscopy,differential scanning calorimetry,elemental *** energetic salts exhibit good thermal stability with decomposition temperatures ranged from 182℃to 245℃.The sensitivity of compounds 2,6,10 and 14 is similar or superior to that of RDX while the others were much more insensitive to mechanical ***,detonation velocity of 10(8843 m/s)surpass that of RDX(D=8795 m/s).Considering the high gas production volume(≥808 L/kg)of 2,4,10and 12,constant-volume combustion experiments were conduct to evaluate their gas production capacities *** compounds possess much higher maximum gas-production pressures(P_(max):7.88-10.08 MPa)than the commonly used reagent guanidine nitrate(GN:P_(max)=4.20 MPa),which indicate their strong gas production capacity.

关键词： Fused cyclic compound Triazole Divalent cation Gas production Energetic materials

Determination and Comparison of M_(L),M_(S_BB),m_(B),M_(Wp),M_(WW),M_(dt),and M(GNSS)for the 22 May 2021 M7.4 Madoi,Qianghai,China Earthquake

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Journal of Earth Science 2022年第4期33卷 847-856页

作者： Xiaolin Huang Yuyang Peng chuang cheng Dun Wang Qiang Yao State Key Laboratory of Geological Processes and Mineral Resources School of Earth SciencesChina University of GeosciencesWuhan 430074China

The 2021 Madoi M7.4 Earthquake in Qinghai is a major earthquake that occurred in the Bajankara Block of Qinghai-Tibet Plateau in the past 30 years,which spatially filled the seismogenic gap in the eastern section of the northern boundary of the *** we determined the values of M_(L),M_(S_BB),m_(B),M_(Wp),M_(WW),M_(dt),and M(GNSS)by abundant regional and global seismic and geodetic observations,which is 6.61,7.43,7.18,7.33,7.43,7.38,and 7.4,*** compare the time efficiency and stability of different magnitude scales,we generated a real-time environment,to iteratively determine the magnitudes over elapsed *** methods such as m_(B),M_(S_BB),M_(Wp) gave considerable variations of as large as 0.5 units for the determined magnitudes with elapsed time,as more data were *** such as M_(WW) and M_(dt) were very stable with increasing data over *** systematic calculations of various magnitude scales in this study quantitively evaluated the stability and accuracy of those methods,shading light on the adaptability and applicability of different magnitude scales.

关键词： the 2021 Madoi Earthquake earthquake magnitude magnitude scale earthquakes

Exploration of the mechanism of cavitation vortex rope and vortex development in the draft tube of tubular turbine units

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International Journal of Agricultural and Biological Engineering 2024年第1期17卷 163-171,F0002页

作者： chuang cheng Zhenggui Li Changrong Shen Shenglong Gu Chuchu Zeng Chuanzheng Bai Meng Liu Junfeng Hu Qinghai University of Science and Technology Xining 810000China Key Laboratory of Fluid and Power Machinery Ministry of Education(Xihua University)Chengdu 610039China South-to-North Water Diversion East Jiangsu Water Source Co. Ltd.Nanjing 210029China School of civil engineering and water resources Qinghai UniversityXining 810016China Dongyuan Branch of Shenzhen Water Planning and Design Institute Co. Ltd.Changsha 410000China

Draft tube vortex rope is considered a special cavitation flow phenomenon in tubular turbine *** vortex rope is one of the most detrimental factors affecting the safety of hydraulic *** this study,ANSYS CFX software was utilized to numerically simulate the internal cavitation flow of a hydraulic turbine draft *** evolution of the cavitation vortex core was characterized by vortex line distribution and vorticity transport *** shape and number of blades influenced the revolving direction and distribution characteristics of the vortex close to the runner cone,which formed a counterclockwise-clockwise-counterclockwise distribution ***,there were many secondary flows in the draft *** cancellation and dissipation between the flows was one of the reasons for reduction in *** the cross-sectional shape of the draft tube was changed,the vorticity was distributed from the center of the vortex rope to all parts of the cross-sectional draft tube,with extreme values at the center and at the *** vortex stretching and dilatation terms played a major role in the change in vorticity,with the baroclinic torque having an effect at the center of the vortex rope,this study is helpful to understand the flow of water in the draft tube and guide the design and optimization of the draft tube in engineering application.

关键词： cavitation vortex rope vorticity transport equation vortex line draft tube

Rapid report of the 8 January 2022 M_(S)6.9 Menyuan earthquake,Qinghai,China

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Earthquake Research Advances 2022年第1期2卷 4-14页

作者： Hongfeng Yang Dun Wang Rumeng Guo Mengyu Xie Yang Zang Yue Wang Qiang Yao chuang cheng Yanru An Yingying Zhang Earth System Science Programme Faculty of ScienceThe Chinese University of Hong KongShatinNTHong KongChina China University of Geosciences Wuhan WuhanHubeiChina State Key Laboratory of Geodesy and Earth's Dynamic Innovation Academy for Precision Measurement Science and TechnologyChinese Academy of SciencesWuhanChina China Earthquake Networks Center China Earthquake AdministrationBeijingChina

The M_(S)6.9 Menyuan earthquake in Qinghai Province,west China is the largest earthquake by far in *** earthquake occurs in a tectonically active region,with a background b-value of 0.87 within 100 km of the epicenter that we derived from the unified catalog produced by China Earthquake Networks Center since late *** surveys have revealed surface ruptures extending 22 km along strike,with a maximum ground displacement of 2.1 *** construct a finite fault model with constraints from In SAR observations,which showed multiple fault segments during the Menyuan *** major slip asperity is confined within 10 km at depth,with the maximum slip of 3.5 *** real-time back-projection results of coseismic radiation indicate a northwest propagating rupture that lasted for~10 *** estimates from the back-projection results show up to a Mercalli scale of IX near the ruptured area,consistent with instrumental measurements and the observations from the field *** locations(up to January 21,2022)exhibit two segments,extending to~20 km in *** largest one reaches M_(S)5.3,locating near the eastern end of the aftershock *** the location and the approximate magnitude of the mainshock had been indicated by previous studies based on paleoearthquake records and seismic gap,as well as estimated stressing rate on faults,significant surfacebreaching rupture leads to severe damage of the high-speed railway system,which poses a challenge in accurately assessing earthquake hazards and risks,and thus demands further investigations of the rupture behaviors for crustal earthquakes.

关键词： Surface rupture Coseismic slip Real-time Intensity Aftershock location and statistics Earthquake magnitude forecasting

GmDFB1,an ARM-repeat superfamily protein,regulates floral organ identity through repressing siRNA-and miRNA-mediated gene silencing in soybean

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Journal of Integrative Plant Biology 2024年第8期66卷 1620-1638页

作者： Jie Li Wenxiao Zhang Qing Lu Jiaqi Sun chuang cheng Shiyu Huang Shuo Li Qiang Li Wei Zhang Chuanen Zhou Bin Liu Fengning Xiang The Key Laboratory of Plant Development and Environmental Adaptation Biology Ministry of EducationSchool of Life SciencesShandong UniversityQingdao 266237China State Key Laboratory of Crop Gene Resources and Breeding Institute of Crop SciencesChinese Academy of Agricultural SciencesBeijing 100081China

The development of flowers in soybean(Glycine max)is essential for determining the yield potential of the *** silencing pathways are involved in modulating flower development,but their full elucidation is still ***,we conducted a forward genetic screen and identified an abnormal flower mutant,deformed floral bud1-1(Gmdfb1-1),in *** mapped and identified the causal gene,which encodes a member of the armadillo(ARM)-repeat *** small RNA sequencing(sRNA-seq),we found an abnormal accumulation of small interfering RNAs(si RNAs)and microRNA(miRNAs)in the Gmdfb1 *** further demonstrated that GmDFB1 interacts with the RNA exosome cofactor SUPER KILLER7(Gm SKI7).Additionally,GmDFB1 interacts with the PIWI domain of ARGONAUTE 1(GmAGO1)to inhibit the cleavage efficiency on the target genes of s *** enhanced gene silencing mediated by siRNA and miRNA in the Gmdfb1 mutants leads to the downregulation of their target genes associated with flower *** study revealed the crucial role of GmDFB1 in regulating floral organ identity in soybean probably by participating in two distinct gene silencing pathways.

关键词： ARM-repeat superfamily protein ARGONAUTE 1 SUPER KILLER 7 flower development gene silencing small RNAs soybean

Spontaneous Orientation Polarization of Anisotropic Equivalent Dipoles Harnessed by Entropy Engineering for Ultra‑Thin Electromagnetic Wave Absorber

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Nano-Micro Letters 2025年第1期17卷 424-438页

作者： Honghan Wang Xinyu Xiao Shangru Zhai chuang Xue Guangping Zheng Deqing Zhang Renchao Che Junye cheng Liaoning Key Lab of Lignocellulose Chemistry and BioMaterials Liaoning Collaborative Innovation Center for Lignocellulosic BiorefinerySchool of Light Industry and Chemical EngineeringDalian Polytechnic UniversityDalian 116034People’s Republic of China School of Life Science and Biotechnology Dalian University of TechnologyDalian 116024People’s Republic of China Department of Mechanical Engineering Hong Kong Polytechnic UniversityHung HomKowloonHong Kong 999077People’s Republic of China School of Materials Science and Engineering Qiqihar UniversityQiqihar 161006People’s Republic of China Laboratory of Advanced Materials Shanghai Key Lab of Molecular Catalysis and Innovative MaterialsAcademy for Engineering&TechnologyFudan UniversityShanghai 200438People’s Republic of China Department of Materials Science Shenzhen MSU-BIT UniversityShenzhen 517182People’s Republic of China

The synthesis of carbon supporter/nanoscale high-entropy alloys(HEAs)electromagnetic response composites by carbothermal shock method has been identified as an advanced strategy for the collaborative competition engineering of conductive/dielectric *** migration modes within HEAs as manipulated by the electronegativity,valence electron configurations and molar proportions of constituent elements determine the steady state and efficiency of equivalent ***,enlightened by skin-like effect,a reformative carbothermal shock method using carbonized cellulose paper(CCP)as carbon supporter is used to preserve the oxygencontaining functional groups(O·)of carbonized cellulose fibers(CCF).Nucleation of HEAs and construction of emblematic shell-core CCF/HEAs heterointerfaces are inextricably linked to carbon metabolism induced by O·.Meanwhile,the electron migration mode of switchable electronrich sites promotes the orientation polarization of anisotropic equivalent *** virtue of the reinforcement strategy,CCP/HEAs composite prepared by 35%molar ratio of Mn element(CCP/HEAs-Mn_(2.15))achieves efficient electromagnetic wave(EMW)absorption of−51.35 dB at an ultra-thin thickness of 1.03 *** mechanisms of the resulting dielectric properties of HEAs-based EMW absorbing materials are elucidated by combining theoretical calculations with experimental characterizations,which provide theoretical bases and feasible strategies for the simulation and practical application of electromagnetic functional devices(e.g.,ultra-wideband bandpass filter).

关键词： High-entropy alloys Carbothermal shock Switchable electron migration modes Emblematic shell-core heterointerfaces Ultra-thin thickness

A discussion on the distribution of international container junction ports in northern China

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Journal of Geographical Sciences 2000年第4期10卷 53-58页

作者： HAN Zeng-lin, MA chuang, WANG cheng-jin (Department of Geography, Liaoning Normal University, Dalian 116029 China) 辽宁师范大学辽宁大连

Based on the trend of the international container traffic and the necessity to build international junction ports of container traffic in northern China, this article analyses the situation and potential of the three principal ports in northern China: Tianjin, Qingdao and Dalian. Furthermore, the authors study the distribution of international container junction ports in the Chinese north.

关键词： container junction ports distribution northern China