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Potential and policy issues for sustainable development of wind power in China

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Journal of Modern Power Systems and Clean Energy 2013年第3期1卷 204-215页

作者： Zhongfu tan h.W.NGAN Yang WU huijuan ZhANG Yihang SONG Chao YU School of Economics and Management North China Electric Power UniversityBeijingChina School of Economics and Management Shanghai University of Electric PowerShanghaiChina Department of Electrical Engineering The Hong Kong Polytechnic UniversityHong KongChina

This paper presents a macroscopic view on the prevailing policy and potential issues in respect of the sustainable wind power development in *** starts by analyzing the characteristics of wind power resources and pin-pointing the relationship between the regulatory policies and various economic,taxation,legal and grid integration attributes relating to the wind power *** it follows by analyzing the status quo and capabilities of the wind power manufacturing industry in China including its operational efficiency and grid integration *** economic and environmental benefits are estimated by relating to the associated costing analysis in respect of the major contributing factors such as manufacturing,operational and financial *** of the associated benefits analysis indicate that the use of the wind power generation helps to save a significant equivalent amount of standard coal consumption resulting to reduction of emission ***,the potential of wind power development in China is shown to be affirmative and the sustainable energy policy is effectively implemented in China.

关键词： Wind power Renewable energy policy Sustainable development Energy saving Emission reduction

On-chip detection of a single nucleotide polymorphism without polymerase amplification

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Nano Research 2014年第9期7卷 1302-1310页

作者： Jinhee han Matthew tan Lakshmana Sudheendra Robert h. Weiss Ian M. Kennedy Department of Mechanical and Aerospace Engineering University of California Davis California 95616 USA Division of Nephrology Department of Internal Medicine University of California Davis California 95616 USA Medical Service Sacramento VA Medical Center Sacramento California 95655 USA

A nanoparticle-assembled photonic crystal （PC） array was used to detect single nucleotide polymorphism （SNP）. The assay platform with PC nanostructure enhanced the fluorescent signal from nanoparticle-hybridized DNA complexes due to phase matching of excitation and emission. Nanoparticles coupled with probe DNA were trapped into nanowells in an array by using an electrophoretic particle entrapment system. The PC/DNA assay platform was able to identify a 1 base pair （bp） difference in synthesized nucleotide sequences that mimicked the mutation seen in a feline model of human autosomal dominant polycystic kidney disease （PKD） with a sensitivity of 0.9 fg/mL （50 aM）-sensitivity, which corresponds to 30 oligos/array. The reliability of the PC/DNA assay platform to detect SNP in a real sample was demonstrated by using genomic DNA （gDNA） extracted from the urine and blood of two PKD-wild type and three PKD positive cats. The standard curves for PKD positive （PKD＋） and negative （PKD-） DNA were created using two feline-urine samples. An additional three urine samples were analyzed in a similar fashion and showed satisfactory agreement with the standard curve, confirming the presence of the mutation in affected urine. The limit of detection （LOD） was 0.005 ng/mL which corresponds to 6 fg per array for gDNA in urine and blood. The PC system demonstrated the ability to detect a number of genome equivalents for the PKD SNP that was very similar to the results reported with real time polymerase chain reaction （PCR）. The favorable comparison with quantitative PCR suggests that the PC technology may find application well beyond the detection of the PKD SNP, into areas where a simple, cheap and portable nucleic acid analvsis is desirable.

关键词： photonic crystal array single nucleotidepolymorphisms DNA polycystic kidney disease real time polymerasechain reaction (PCR)

Wideband Channel Estimation for Thz Massive MIMO

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China Communications 2021年第5期18卷 66-80页

作者： Jingbo tan Linglong Dai Beijing National Research Center for Information Science and Technology(BNRist)as well as the Department of Electronic Engineering Tsinghua UniversityBeijing 100084China

Terahertz(Thz)communication is considered to be a promising technology for future 6G *** overcome the severe attenuation and relieve the high power consumption,massive multipleinput multiple-output(MIMO)with hybrid precoding has been widely considered for Thz ***,accurate wideband channel estimation,which is essential for hybrid precoding,is challenging in Thz massive MIMO *** existing wideband channel estimation schemes based on the ideal assumption of common sparse channel support will suffer from a severe performance loss due to the beam split *** this paper,we propose a beam split pattern detection based channel estimation scheme to realize reliable wideband channel estimation in Thz massive MIMO ***,a comprehensive analysis on the angle-domain sparse structure of the wideband channel is provided by considering the beam split *** on the analysis,we define a series of index sets called as beam split patterns,which are proved to have a one-to-one match to different physical channel *** by this one-to-one match,we propose to estimate the physical channel direction by exploiting beam split patterns at ***,the sparse channel supports at different subcarriers can be obtained by utilizing a support detection *** support detection window is generated by expanding the beam split pattern which is determined by the obtained physical channel *** above estimation procedure will be repeated path by path until all path components are ***,the wideband channel can be recovered by calculating the elements on the total sparse channel support at all *** proposed scheme exploits the wideband channel property implied by the beam split effect,i.e.,beam split pattern,which can significantly improve the channel estimation *** results show that the proposed scheme is able to achieve higher accuracy than existing schemes.

关键词： Thz communication massive MIMO hybrid precoding beam split wideband channel estimation

Active Sites for Adsorption and Reaction of Molecules on Rutile TiO2(110) and Anatase TiO2(001) Surfaces

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Chinese Journal of Chemical Physics 2015年第4期28卷 -页

作者： Shi-jing tan Bing Wang hefei National Laboratory for Physical Sciences at the Microscale and Synergetic Innovation Center of Quantum Information and Quantum Physics University of Science and Technology of China Hefei 230026 China

The reactivity of specific sites on rutile TiO2(110)?(1×1) surface and anatase TiO2(001)?(1×4) surface has been comparably studied by means of high resolution scanning tunneling microscopy. At the rutile TiO2(110)?(1×1) surface, we find the defects of oxygen vacancy provide distinct reactivity for O2 and CO2adsorption, while the terminal fivefold-coordinated Ti sites dominate the photocatalytic reactivity for h2O and Ch3Oh dissociation. At the anatase TiO2(001)?(1×4) surface, the sixfold-coordinated terminal Ti sites at the oxidized surface seem to be inert in both O2 and h2O reactions, but the Ti-rich defects which introduce the Ti3+ state into the reduced surface are found to provide high reactivity for the reactions of O2 and h2O. By comparing the reactions on both rutile and anatase surfaces under similar experimental conditions, we find the reactivity of anatase TiO2(001) is actually lower than rutile TiO2(110), which challenges the conventional knowledge that the anatase (001) is the most reactive TiO2surface. Our findings could provide atomic level insights into the mechanisms of TiO2 based catalytic and photocatalytic chemical reactions.

关键词： TiO2 Rutile Anatase Photocatalysis Scanning tunneling microscopy

heat Capacity and Enthalpy of Fusion of Crystalline Pyrimethanil Decylate(C_(22)h_(33)N_3O_2)

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Chemical Research in Chinese Universities 2005年第6期21卷 697-701页

作者： SUN Xiao-hong LIU Yuan-fa tan Zhi-cheng WANG Mei-han JIA Ying-qi College of Chemical Engineering Chemical Research Institute Northwest University Xi＇an 710069 P. R. China Department of Chemistry Northwest University Xi＇an 710069 P. R. China Thermochemistry Laboratory Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 P. R. China

Low-temperature heat capacities of pyrimethanil decylate （ C22 h33 N3 O2 ） were precisely measured with an automated adiabatic calorimeter over the temperature range from 78 to 373 K. The sample was observed to melt at （311.04 ± 0.06） K. The molar enthalpy and entropy of fusion as well as the chemical purity of the compound were determined to be（45876± 12） J/mol, （147. 50 ±0. 05） J. mol^-1 · K^-1 and （99. 21 ±0. 03）% （mass fraction）, respectively. The extrapolated melting temperature for the absolutely pure compound obtained from fractional melting experiments is （311. 204±0. 035 ） K.

关键词： Pyrimethanil decylate heat capacity Adiabatic calorimetry DSC

Advancement in QDs for optoelectronic applications and beyond

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Nano Research 2024年第12期17卷 10426-10445页

作者： Memoona Qammar Max J.h.tan Pengbo Ding Jianchao Ge Yinthai Chan Jonathan E.halpert Department of Chemistry Hong Kong University of Science and Technology(HKUST)Hong Kong 999077China Department of Chemistry Northwestern UniversityEvanstonIllinois 60208USA Cosmic Discovery Sdn Bhd 10 Jalan Wawasan 3/KU7Sungai Kapar Indah42200 KlangSelangorMalaysia

This review focuses on the history and current state of the art optoelectronic applications of quantum dots involving light *** focus mainly on three areas of commercial,or potential commercial interest,including quantum dot light emitting devices(QLEDs,sometimes called QD-LEDs),lasing applications,and quantum computing *** main connection between these areas is the development of the science and engineering needed to achieve electrical excitation of the quantum dot in an optoelectronic device in order to achieve emission with characteristics particularly suited to the application in *** to the special physics of quantum dots,these materials are particularly well suited for both existing commercial applications,and potentially for future applications,such as single photon sources,spin cubits,or polarized *** conclude with an analysis of the future prospects for these exciting *** 30 years of progress since the Nobel Prize winning work on monodisperse samples of QDs,our goal is to highlight the current start of the art,discuss the current issues for each technology,and suggest future goals for the next 30 years for quantum dot research.

关键词： quantum dots quantum confinement optoelectronic properties color purity lasing quantum coherence quantum computing

The C_2h_2 -type Zinc Finger Protein ZFP182 is Involved in Abscisic Acid-Induced Antioxidant Defense in Rice

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Journal of Integrative Plant Biology 2012年第7期54卷 500-510页

作者： hong Zhang Lan Ni Yanpei Liu Yunfei Wang Aying Zhang Mingpu tan Mingyi Jiang College of Life Sciences Nanjing Agricultural UniversityNanjing 210095China National Key Laboratory of Crop Genetics and Germplasm Enhancement Nanjing Agricultural UniversityNanjing 210095China

C2h2-type zinc finger proteins （ZFPs） are thought to play important roles in modulating the responses of plants to drought, salinity and oxidative stress. however, direct evidence is lacking for the involvement of these ZFPs in abscisic acid （ABA）-induced antioxidant defense in plants. In this study, the role of the rice （Oryza sativa L. *** cv. Nipponbare） C2h2-type ZFP ZFP182 in ABA-induced antioxidant defense and the relationship between ZFP182 and two rice MAPKs, OsMPK1 and OsMPK5 in ABA signaling were investigated. ABA treatment induced the increases in the expression of ZFP182, OsMPK1 and OsMPK5, and the activities of superoxide dismutase （SOD） and ascorbate peroxidase （APX） in rice leaves. The transient gene expression analysis and the transient RNA interference （RNAi） analysis in protoplasts showed that ZFP182, OsMPK1 and OsMPK5 are involved in ABA-induced up-regulation in the activities of SOD and APX. Besides, OsMPK1 and OsMPK5 were shown to be required for the up-regulation in the expression of ZFP182 in ABA signaling, but ZFP182 did not mediate the ABA-induced up-regulation in the expression of OsMPK1 and OsMPKS. These results indicate that ZFP182 is required for ABA-induced antioxidant defense and the expression of ZFP182 is regulated by rice MAPKs in ABA signaling.

关键词： Zinc finger protein abscisic acid antioxidant defense rice MAPK.

The Effect of Concave Size on the Aerodynamics of a Maglev Train

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Journal of Bionic Engineering 2022年第3期19卷 709-723页

作者： Shuang Meng Dan Zhou Changda tan Key Laboratory of Traffic Safety on Track(Central South University) Ministry of EducationChangsha410075China Joint International Research Laboratory of Key Technology for Rail Traffic Safety Changsha410075China National and Local Joint Engineering Research Center of Safety Technology for Rail Vehicle Changsha410075China

Inspired by shark’s skin in nature,a non-smooth surface could be an ideal model for changing the flow characteristics of fluids on the object *** analyze the effect of a non-smooth surface with concaves on the maglev train aerodynamic performances and to investigate how the concave size affects the aerodynamic forces and flow structure of a maglev train,four 1/10th scaled maglev train models are simulated using an Improved Delayed Detached Eddy Simulation(IDDES)*** numerical strategy used in this study is verified by comparison with the wind tunnel test results,and the comparison shows that the difference was in a reasonable *** results demonstrate that the concaves could effectively reduce the tail car pressure drag,thus reducing the total drag,and that the smaller the concave size was,the better the drag reduction effect would *** change in the lift with the concave size was more significant than that of the drag,and the tail car lift of R1(0.0012h),R2(0.0024h),and R3(0.0036h)train models was 30.1%,43.0%,and 44.5%less than that of the prototype,*** addition,different flow topologies of the wake are *** width and height of the vortex core of the counter-rotating vortices tended to decrease with the concave ***,from the point of view of ensuring the operating safety of a maglev train,a non-smooth surface with small-size concaves is recommended.

关键词： Maglev train Aerodynamic characteristics Concave Numerical simulation

Cloning and expression of endo-β-glucanase II gene in humicola insolens h31-3

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Frontiers in Biology 2008年第3期3卷 287-292页

作者： huifang tan Guoqing ZhANG Guangyu ZhENG Fumian CUI Shijun QIAN Institute of Microbiology Chinese Academy of SciencesBeijing 100101China Beijing Normal University Beijing 100875China

Endo-β-glucanase II(EG II)gene cDNA was isolated from the fungus humicola insolens h31-3 by *** was cloned into the expression vector pGAPZα*** resultant recombinant plasmid was introduced into Pichia pastoris GS115 by electroporation after being linearized by BsphI *** recombinant Pichia pastoris strain was obtained and SDS-PAGE showed that the molecular weight of the expression protein was about 55 *** cultivation condition and the characteristics of the recombinant EG II were also explored.

关键词： humicola insolens Pichia pastoris endoglucanase II secretive expression