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China National Tourist Office,Seoul: Celebrating Mid-Autumn Festival Online

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China & The World Cultural Exchange 2020年第10期86卷 6-8页

作者： dai Shishuang 不详

From September 28 to October 5,2020,China National Tourist Office,Seoul successfully launched the online cultural week,“MidAutumn Festival:A Moonmoment to Remember”,at its official website and social media accounts,which consisted of two sections,i.e.,culture and *** the themes of the Mid-Autumn festival customs,gourmet and tourism.

关键词： Office online Online

Thermal safety boundary of lithium-ion battery at different state of charge

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Journal of Energy Chemistry 2024年第4期91卷 59-72页

作者： Hang Wu Siqi Chen Yan Hong Chengshan Xu Yuejiu Zheng Changyong Jin Kaixin Chen Yafei He Xuning Feng Xuezhe Wei Haifeng dai Clean Energy Automotive Engineering Center Tongji UniversityShanghai 201804China College of Mechanical Engineering University of Shanghai for Science and TechnologyShanghai 200093China State Key Laboratory of Automotive Safety and Energy Tsinghua UniversityBeijing 100084China

Thermal runaway(TR)is a critical issue hindering the large-scale application of lithium-ion batteries(LIBs).Understanding the thermal safety behavior of LIBs at the cell and module level under different state of charges(SOCs)has significant implications for reinforcing the thermal safety design of the lithium-ion battery *** study first investigates the thermal safety boundary(TSB)correspondence at the cells and modules level under the guidance of a newly proposed concept,safe electric quantity boundary(SEQB).A reasonable thermal runaway propagation(TRP)judgment indicator,peak heat transfer power(PHTP),is proposed to predict whether TRP ***,a validated 3D model is used to quantitatively clarify the TSB at different SOCs from the perspective of PHTP,TR trigger temperature,SOC,and the full cycle ***,three different TRP transfer modes are *** interconversion relationship of three different TRP modes is investigated from the perspective of *** paper explores the TSB of LIBs under different SOCs at both cell and module levels for the first time,which has great significance in guiding the thermal safety design of battery systems.

关键词： Lithium-ion battery Battery safety Thermal runaway State of charge Numerical analysis

The Effects of Climate Change on the Planting Boundary and Potential Yield for Different Rice Cropping Systems in Southern China

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Journal of Integrative Agriculture 2014年第7期13卷 1546-1554页

作者： YE Qing YANG Xiao-guang LIU Zhi-juan dai Shu-wei LI Yong XIE Wen-juan CHEN Fu Forestry Institute Jiangxi Agricultural University College of Resources and Environmental Sciences China Agricultural University School of Natural Resources University of Nebraska-Lincoln Lincoln NE 68583 USA Guizhou Key Laboratory of Mountainous Climate and Resources College of Agriculture and Biotechnology China Agricultural University

Based on climate data from 254 meteorological stations, this study estimated the effects of climate change on rice planting boundaries and potential yields in the southern China during 1951-2010. The results indicated a signiifcant northward shift and westward expansion of northern boundaries for rice planting in the southern China. Compared with the period of 1951-1980, the average temperature during rice growing season in the period of 1981-2010 increased by 0.4＆#176;C, and the northern planting boundaries for single rice cropping system （SRCS）, early triple cropping rice system （ETCRS）, medium triple cropping rice system （MTCRS）, and late triple cropping rice system （LTCRS） moved northward by 10, 30, 52 and 66 km, respectively. In addition, compared with the period of 1951-1980, the suitable planting area for SRCS was reduced by 11%during the period of 1981-2010. However, the suitable planting areas for other rice cropping systems increased, with the increasing amplitude of 3, 8, and 10%for ETCRS, MTCRS and LTCRS, respectively. In general, the light and temperature potential productivity of rice decreased by 2.5%. Without considering the change of rice cultivars, the northern planting boundaries for different rice cropping systems showed a northward shift tendency. Climate change resulted in decrease of per unit area yield for SRCS and the annual average yields of ETCRS and LTCRS. Nevertheless, the overall rice production in the entire research area showed a decreasing trend even with the increasing trend of annual average yield for MTCRS.

关键词： climate change potential yield rice cropping system planting boundary

KHCO_3 activated carbon microsphere as excellent electrocatalyst for VO^(2+)/VO_2^+ redox couple for vanadium redox flow battery

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Journal of Energy Chemistry 2019年第2期28卷 103-110页

作者： Chen Zhao Yuehua Li Zhangxing He Yingqiao Jiang Lu Li Fengyun Jiang Huizhu Zhou Jing Zhu Wei Meng Ling Wang Lei dai School of Chemical Engineering North China University of Science and Technology State Key Laboratory Breeding Base of Nuclear Resources and Environment East China University of Technology Hebei Province Key Laboratory of Photocatalytic and Electrocatalytic Materials for Environment North China University of Science and Technology

In this paper,carbon microsphere prepared by hydrothermal treatment was activated by KHCO_3 at high temperature,and employed as the catalyst for VO^(2+)/VO_2^+redox reaction for vanadium redox flow battery(VRFB).Carbon microsphere can be etched by KHCO_3 due to the reaction between the pyrolysis products of KHCO_3 and carbon ***,KHCO_3 activation can bring many oxygen functional groups on carbon microsphere,further improving the wettability of catalyst and increasing the active *** electrocatalytic properties of carbon microsphere from hydrothermal treatment are improved by high temperature carbonization,and can further be enhanced by KHCO_3 *** carbon microsphere samples,the VO^(2+)/VO_2^+redox reaction exhibits the highest electrochemical kinetics on KHCO_3 activated *** cell using KHCO_3 activated carbon microsphere as the positive catalyst demonstrates higher energy efficiency and larger discharge capacity,especially at high current *** results reveal that KHCO_3 activated carbon microsphere is an efficient,low-cost carbon-based catalyst for VO^(2+)/VO_2^+redox reaction for VRFB system.

关键词： Energy storage Vanadium redox flow battery Carbon microsphere KHCO3 Etching

Development and validation of an RP-HPLC method for simultaneous determination of Ramipril and Amlodipine in tablets

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Journal of Pharmaceutical Analysis 2013年第6期3卷 440-446页

作者： Shi-Ying dai Shi-Ting Qiu Wei Wu Chun-Mei Fu Key Laboratory of Drug Targeting and Drug Delivery System Ministry of EducationWest China School of Pharmacy Sichuan University

AnRP-HPLC method for the simultaneous determination ofRamipril （RP） andAmlodipine （AL） in tablets was developed and validated by Chinese Pharmacopoeia 2010. The linearity of the proposed method was investigated in the range of 0.01-0.25 mg/mL （r^2=0.9998） for RP and 0.014-0.36 mg/mL （r^2=0.9997） for AL. The limits of detection （LOD） were 0.06 lag/mL and 0.02 μg/mL for RP and AL, and the limits of quantitation （LOQ） were 0.2 Dg/mL and 0.07 μg/mL, respectively. Some major impurities and degradation products did not disturb the detection of RP and AL and the assay can thus be considered stability-indicating.

关键词： Ramipril Amlodipine RP-HPLC Stability-indicating

Multi-band microwave photonic satellite repeater scheme employing intensity Mach-Zehnder modulators

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The Journal of China Universities of Posts and Telecommunications 2017年第2期24卷 89-95页

作者： Yin Jie Dong Tao Zhang Bin Hao Yan Cao Guixing Cheng Zijing Xu Kun Zhou Yue dai Jian Beijing Institute of Satellite Information Engineering State Key Laboratory of Space-Ground Integrated Information Technology Space Star Technology Company Limited Institute of Telecommunication Satellite China Academy of Space Technology State Key Laboratory of Information Photonics and Optical Communications Beijing University of Posts and Telecommunications

To solve the satellite repeater＇s flexible and wideband frequency conversion problem, we propose a novel microwave photonic repeater system, which can convert the upload signal＇s carrier to six different frequencies. The scheme employs one 20 GHz bandwidth dual-drive Mach-Zehnder modulator （MZM） and two 10 GHz bandwidth MZMs. The basic principle of this scheme is filtering out two optical sidebands after the optical carrier suppression （OCS） modulation and combining two sidebands modulated by the input radio frequency （RF） signal. This structure can realize simultaneous multi-band frequency conversion with only one frequency-fixed microwave source and prevent generating harmful interference sidebands by using two corresponding optical filters after optical modulation. In the simulation, one C-band signal of 6 GHz carrier can be successfully converted to 12 GHz （Ku-band）, 28 GHz, 34 GHz, 40 GHz, 46 GHz （Ka-band） and 52 GHz （V-band）, which can be an attractive method to realize multi-band microwave photonic satellite repeater. Alternatively, the scheme can be configured to generate multi-band local oscillators （LOs） for widely satellite onboard clock distribution when the input RF signal is replaced by the internal clock source.

关键词： fiber optics and optical communication radio frequency photonics microwave photonics

Fundamental Principles behind Climate Change

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Meteorological and Environmental Research 2024年第4期15卷 21-23页

作者： Haiyan dai Ecological and Agricultural Meteorological Center in Inner Mongolia Huhhot 010051China

The attribution of climate change is complex,and the current mainstream view is more inclined towards human activities and carbon dioxide emissions from fossil *** complex problem is composed of basic *** article elaborates on the basic logic behind climate change(a global hot topic)through basic principles such as reaction types,carbon thermal properties of biomass energy,greenhouse gas attribution,ecological basic theory,and energy cycle.

关键词： Climate change Feedback mechanisms Fundamental principles Disasters

Characterization and evaluation of rice blast resistance of Chinese indica hybrid rice parental lines

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The Crop Journal 2017年第6期5卷 509-517页

作者： Yunyu Wu Ling Yu Ning Xiao Zhengyuan dai Yuhong Li Cunhong Pan Xiaoxiang Zhang Guangqing Liu Aihong Li Lixiahe Agricultural Research Institute of Jiangsu Province Yangzhou 225009 China Jiangsu Collaborative Innovation Center for Modern Crop Production Nanjing 225009 China Jiangsu Golden Land Seed Industry Co. Ltd China

The development of resistant varieties and hybrid combinations has been the most effective and economical strategy to control blast disease caused by Magnaporthe ***, the distribution of major R genes and blast resistance characterization in hybrid rice parents has not been well investigated, resulting in their limited use in hybrid rice blast-resistance breeding. In the present study, 88 elite indica hybrid rice parental lines were evaluated with 30 isolates of M. oryzae collected from the main planting area of indica hybrid rice in China and were characterized for the presence of 11 major resistance genes using molecular markers. The pathogenicity assays showed that four types of hybrid rice parent line showed some resistance to M. oryzae. However, the proportions of highly resistant lines and the mean resistance frequency(RF) varied among the four types, with resistance in decreasing order shown by three-line restorer lines, three-line maintainer lines, two-line sterile lines, and two-line restorer lines. All 88 hybrid rice parental lines carried more than one R gene, but none carried the R genes Pi1 and Pi2. Although Pid3 and Pi9 were present only in three-line restorer lines and Pigm only in three-line maintainer lines, the remaining six R genes(Pib, Pid2, Pi5, Pia, Pi54, and Pita) were present in the four types of hybrid rice parent with significantly different distribution frequencies. The correlation between R genes and resistance reactions was investigated. The results are expected to provide useful information for rational utilization of major R genes in hybrid rice breeding programs.

关键词： Hybrid rice parental lines Magnaporthe oryzae Pi genes Resistance evaluation Molecular markers

Research on the Key Technology of LTCC Pressure Sensor

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Photonic Sensors 2015年第3期5卷 211-216页

作者： Xiaoyan dai Yukun YUAN Tanyong WEI Qiulin TAN College of Instruments and Electronic North University of China Taiyuan 030051 China Key Laboratory of Instrumentation Science & Dynamic Measurement North University of China Taiyuan 030051China National Key Laboratory for Electronic Measurement Technology North University of China Taiyuan 030051 China

This article introduces the fabrication technology processes of the capacitive pressure sensor based on the low temperature co-fired ceramic （LTCC） material. Filling the cavity with different materials as a sacrificial layer is mainly discussed, and two different materials are chosen in the fabrication. It is found that the cavity filled with polyimide expands largely during sintering, while carbon ESL49000 material filled is more preferable to keep the cavity flat. Finally, the structure leaving without an air evacuation channel is designed and tested in a built-up pressure environment, the frequency measured decreases approximately linearly with the pressure applied, which proves the design leaving no air evacuation channel advisable.

关键词： LTCC sacrifice layer capacitive cavity passive wireless wireless detection