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Effects of electromagnetic field and lubricate condition on the surface quality of magnesium alloy billet during LFEC processing

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Science China(Technological Sciences) 2009年第1期52卷 180-185页

作者： QiChi le ZhiQiang Zhang JianZhong cui Key Laboratory of Electromagnetic Processing of Materials Ministry of Education Northeastern University Shenyang 110004 China

The microstructures of the magnesium billets could be improved markedly by low-frequency electro-magnetic casting (LFEC) processing. In fact, the low-frequency electromagnetic field (LFEF) also has favorite effect on the surface quality of billet. However, few public reports on the surface quality of LFEC magnesium billets could be found. Therefore, a new crystallizer with a metal internal sleeve to-gether with a kind of lubricant was designed aiming at lowing surface turning quantity, and the effects of casting velocity, electromagnetic condition and lubrication on the surface quality of magnesium billets were investigated. The results indicate that LFEF together with the lubricate condition would be responsible for the surface quality of the billets, and the high surface quality billets could be achieved by optimizing the casting conditions.

关键词： magnesium alloy billet low-frequency electromagnetic casting (LFEC) lubrication surface quality

Transient features of graphitization and nitrogen-vacancy color centers in a diamond fabricated by localization femtosecond laser direct writing

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Science China(Technological Sciences) 2024年第8期67卷 2530-2536页

作者： cui Lin yin SiYu HU ZiFan WANG lei State Key Laboratory of Integrated Optoelectronics College of Electronic Science and EngineeringJilin UniversityChangchun 130012China

Femtosecond laser direct writing provides an efficient approach to fabricating single nitrogen vacancy(NV) color centers with a relatively high yield. Different from previously reported NV color centers with a random distribution in a bulk diamond or nanocrystals, this gives an opportunity to study the photophysical properties of single NV color centers with precise numbers and positions. However, ultrafast studies on single NV color centers prepared by localization femtosecond laser direct writing are still rare, especially for the graphitization inside a diamond and its relationship with single NV color centers. Here, we report the broadband transient absorption(TA) spectroscopic features of the graphitization and NV color centers in a diamond fabricated by localization femtosecond laser direct writing at room temperature under 400 nm excitation. In comparison with the graphene oxide film, the bleaching features of the graphitization point array in a diamond are similar to reduced graphene oxide,accompanied by excited state absorption signals from local carbon atom vacancy defects in graphene-like structures induced by laser writing. On the other hand, transient features of laser processing array containing single NV color centers with a yield of~50% are different from those of the graphitization point array. Our findings suggest that for ultrashort pulse processing of diamonds, broadband TA spectral signals are sensitive to the surrounding atomic environment of processing sites, which could be applied to laser writing point defects in other materials used as solid-state single photon sources.

关键词： nitrogen-vacancy color center graphitization diamond femtosecond laser direct writing ultrafast spectroscopy

SMART GRID COMMUNICATIONS

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China Communications 2015年第3期12卷 I0002-I0003页

作者： XIE le cui Shuguang Electric Power and Power Electronics Group at Texas A&M University Texas A&M University

As the society increasingly emphasizes the need of clean and renewable energy systems,the electric power industry is undergoing profound changes to transform a passive,hierarchical grid into an active and open-access smart *** by advances in sensing,communication,and actuation,future smart grids offer much broader opportunities for cross-fertilization between the traditional power engineering community and the communication *** special issue pres-

关键词：电网通信智能能源系统电力行业电力工程测试压力可再生社区

Solitons and periodic waves for a generalized(3+1)-dimensional Kadomtsev-Petviashvili equation in fluid dynamics and plasma physics

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Communications in Theoretical Physics 2020年第11期72卷 30-36页

作者： Dong Wang Yi-Tian Gao cui-cui Ding Cai-yin Zhang Ministry-of-Education Key Laboratory of Fluid Mechanics and National Laboratory for Computational Fluid Dynamics Beijing University of Aeronautics and AstronauticsBeijing 100191China

Under investigation in this paper is a generalized(3+1)-dimensional Kadomtsev-Petviashvili equation in fluid dynamics and plasma *** and one-periodic-wave solutions are obtained via the Hirota bilinear method and Hirota-Riemann *** and velocity of the one soliton are *** are presented to discuss the solitons and one-periodic waves:the coefficients in the equation can determine the velocity components of the one soliton,but cannot alter the soliton magnitude;the interaction between the two solitons is elastic;the coefficients in the equation can influence the periods and velocities of the periodic *** between the one-soliton solution and one-periodic wave solution is investigated.

关键词： fluid dynamics plasma physics generalized(3+1)-dimensional Kadomtsev-Petviashvili equation solitons periodic waves

Estimating regional coal resource efficiency in China using three-stage DEA and bootstrap DEA models

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International Journal of Mining Science and Technology 2015年第5期25卷 861-864页

作者： cui Yijia Huang Guoliang yin Ziyong School of Management China University of Mining & Technology

Based on three-stage data envelopment analysis(DEA) model estimates of resource utilization efficiency of coal,we selected 29 provinces from China's 2012 input-output data and used the bootstrap DEA model to correct the *** results show that the mean overall technical efficiency,pure technical efficiency,and scale efficiency was 0.833,0.998,and 0.711 in 2012,***,the comprehensive technical efficiency score indicates that the scale is *** utilization efficiencies for the eastern,central,and western regions were 0.917,0.731,and 0.629,*** results prove that there are significant differences in the distribution of coal resources utilization efficiency across regions.

关键词： Coal resource efficiency Three-stage DEA Bootstrap DEA Technical efficiency

Field measurement of the impact of natural ventilation and portable air cleaners on indoor air quality in three occupant states

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Energy and Built Environment 2023年第5期4卷 601-613页

作者： Haiguo yin Zhuohang Li Xinping Zhai Yuxuan Ning le Gao Haihang cui Zhenjun Ma Angui Li School of Building Services Science and Engineering Xi’an University of Architecture and TechnologyXi’anShaanxi 710055China The Key Lab of Plateau Building and Eco-community in Qinghai XiningQinghai 810008China Qinghai Building and Materials Research Co. LtdXiningQinghai 810008China Qingdao Municipal Engineering Design Research Institute QingdaoShandong 266000China Sustainable Buildings Research Centre University of WollongongNSW 2522Australia

Natural ventilation(NV)has been considered a simple and effective method of ***,the intro-duction of NV does not achieve better indoor air quality(IAQ)when the outdoor atmospheric environment is ***,portable air cleaners(PACs)are increasing in use in recent years,but their effectiveness is highly dependent on the residents’habits.A typical residence in Xi’an,China was selected to examine the effects of the use of NV alone and the use of NV and PACs together on IAQ in the three occupant states,i.e.,unoc-cupied,sleeping and ***,such as temperature,relative humidity,CO_(2),and PM_(2.5)concentration were measured when changing the window opening and the position of the *** results showed that in the unoccupied state,opening the inner door can promote a more uniform thermal and humid *** the sleeping state,the I/O ratio of the PM_(2.5)concentration was the lowest when the window opening of the bedroom was 1/2 or 3/4,with a mean value of *** the leisure state,only using NV,when the purification rate reaches 90%,the mean purification time of each window opening in the living room is 87.5 *** mean purification time was reduced to 25 min when both NV and PAC were *** on-site purification efficiencies were 91.0%and 94.5%,when the window opening was 1/2(i.e.,the PAC was placed in the center of the room)and 3/4(i.e.,the PAC was placed away from the outer window),respectively.

关键词： Residential buildings Indoor air quality Field measurement Natural ventilation Portable air cleaner Occupant states

Synthesis and Resolution of 10,11-Dihydro-10-hydroxycyproheptadine

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Chinese Chemical letters 2006年第4期17卷 444-446页

作者： Jian Mei cui Da Li yin Institute of Materia Medica Peking Union Medical College ＆ Chinese Academy of Medical Sciences Beijing 100050

10, 11-Dihydro-10-hydroxycyproheptadine was synthesized in a new and facile synthetic route and resolved by L-（-）-2-（1, 3）-dioxo-1, 3-dihydroisoindol-2-yl）-propionic acid and D-（＋）-tartaric acid, respectively.... 详细信息

关键词： H1 receptor antagonist, chiral center, racemate resolution, specific rotation.

MET receptor tyrosine kinase promotes the generation of functional synapses in adult cortical circuits

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Neural Regeneration Research 2025年第5期20卷 1431-1444页

作者： Yuehua cui Xiaokuang Ma Jing Wei Chang Chen Neha Shakir Hitesch Guirram Zhiyu Dai Trent Anderson Deveroux Ferguson Shenfeng Qiu Basic Medical Sciences University of Arizona College of Medicine-PhoenixPhoenixAZUSA Department of Medicine University of Arizona College of Medicine-PhoenixPhoenixAZUSA

Loss of synapse and functional connectivity in brain circuits is associated with aging and neurodegeneration,however,few molecular mechanisms are known to intrinsically promote synaptogenesis or enhance synapse *** have previously shown that MET receptor tyrosine kinase in the developing cortical circuits promotes dendritic growth and dendritic spine *** investigate whether enhancing MET in adult cortex has synapse regenerating potential,we created a knockin mouse line,in which the human MET gene expression and signaling can be turned on in adult(10–12 months)cortical neurons through doxycycline-containing *** found that similar to the developing brain,turning on MET signaling in the adult cortex activates small GTPases and increases spine density in prefrontal projection *** findings are further corroborated by increased synaptic activity and transient generation of immature silent *** MET signaling resulted in an increasedα-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid/N-methyl-Daspartate(AMPA/NMDA)receptor current ratio,indicative of enhanced synaptic function and *** data reveal that enhancing MET signaling could be an interventional approach to promote synaptogenesis and preserve functional connectivity in the adult *** findings may have implications for regenerative therapy in aging and neurodegeneration conditions.

关键词： aging circuit connectivity cortical circuits molecular mechanisms neural regeneration neurodegeneration synapses

“五位一体”涉外法治人才培养的实践育人路径探索

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武汉大学学报（哲学社会科学版） 2025年第1期78卷 43-53页

作者：崔晓静武汉大学法学院湖北武汉430072

加强以实践为导向的育人机制建设,不仅是联系法学理论教学与实务的桥梁,也是涉外法治人才培养的重点和提升法律人才培养质量的关键。当前我国涉外法治人才实践教育存在课堂教学的理念与模式陈旧、实务课程缺乏系统性与针对性、实习实训... 详细信息

加强以实践为导向的育人机制建设,不仅是联系法学理论教学与实务的桥梁,也是涉外法治人才培养的重点和提升法律人才培养质量的关键。当前我国涉外法治人才实践教育存在课堂教学的理念与模式陈旧、实务课程缺乏系统性与针对性、实习实训资源开发不足以及国际实习机会稀缺等方面的问题,它们表现在实践教学的各个环节。要解决这些问题,高校在涉外法治人才培养中应当坚持“五位一体”的涉外法治人才培养实践育人路径,从引导课堂实练、设计实务课程、强化校内实训、组织校外实践、拓展国际实习网络五方面进行一体化针对性改革,整体提升涉外法治人才实践能力培育的实效。

关键词：实践育人涉外法治人才培养教学改革法学教育习近平法治思想

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