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ON QUADRATURE OF HIGHLY OSCILLATORY FUNCTIONS

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Journal of Computational Mathematics 2006年第5期24卷 579-590页

作者： Shu-huang xiang yong-xiong Zhou Department of Applied Mathematics and Software Central South University Changsha 410083 China

Some quadrature methods for integration of ∫a^bf（x）e^iwg（x）dx for rapidly oscillatory functions are presented. These methods, based on the lower order remainders of Taylor expansion and followed the thoughts of Stetter [9], Iserles and NФrsett [5], are suitable for all w and the decay of the error can be increased arbitrarily in case that g＇（x）≠0 for x∈[a, b], and easy to be implemented and extended to the improper integration and the general case I[f]=∫a^b f（x）e^ig（w,x）dx.

关键词： Oscillatory integral quadrature Filon-type method Taylor expansion.

Assessing the maturity of China's seven carbon trading pilots

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Advances in Climate Change Research 2019年第3期10卷 150-157页

作者： LIU Zhe ZHANG yong-xiang Policy Research Centre for Environment and Economy Ministry o f Ecology and EnvironmentBeijing100029China National Climate Center China Meteorological AdministrationBeijing100081China

Indicators based on the developed version of the Capability Maturity Model were set up to access the maturity degree of China's seven pilot carbon markets from 2013 to 2017. Results show that the maturity degree of Shenzhen and Beijing pilot carbon markets ranks first;while those of Guangdong, Hubei, and Shanghai rank second. Tianjin and Chongqing rank lowest. Most of pilot markets failed to perform well on price efficiency except Shenzhen. There is significant disparity in the scores that the pilot carbon markets got, with a range from 9 to 73. The drivers to maintain market maturity is different among the pilot markets, either with a good performance on market structure, scale, or efficiency could lead to a certain score. Much could be done to increase the maturity level of the carbon market. Further downscaling the firm size, raising the legislation level, and increasing the participation of the third party entities may help the carbon market to grow healthier.

关键词： China Carbon market pilots Maturity assessment Market structure Market scale Market efficiency

Strategies to enhance Li^(+) transference number in liquid electrolytes for better lithium batteries

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Nano Research 2023年第6期16卷 8055-8071页

作者： Pan Zhou Xiaokun Zhang yong xiang Kai Liu Department of Chemical Engineering Tsinghua UniversityBeijing 100084China School of Materials and Energy University of Electronic Science and Technology of ChinaChengdu 611731China Advanced Energy Research Institute University of Electronic Science and Technology of ChinaChengdu 611731China Sichuan Provincial Engineering Research Center of Flexible Display Material Genome University of Electronic Science and Technology of ChinaChengdu 611731China

Growing market demand from portable electronics to electric automobiles boosts the development of lithium-ion batteries(LIBs)with high energy density and rate ***,strong solvation effect between lithium ions(Li^(+))and solvent molecules in common electrolytes limits the mobility of Li^(+)ions in ***,anions dominate the charge conduction in electrolytes,and in most cases,the value of Li^(+)transference number(T_(+))is between 0.2 and 0.4.A low T_(+)will aggravate concentration polarization in the process of charging and discharging,especially at high rate,which not only increases the overpotential but also intensifies side reactions,along with uneven deposition of lithium(Li)and the growth of lithium dendrites when lithium metal is used as *** this review,promising strategies to improve T_(+)in liquid electrolytes would be *** migration of Li^(+)ions is affected directly by the types and concentration of lithium salts,solvents,and additives in bulk ***,Li^(+)ions will pass through the separator and solid electrolyte interphase(SEI)when transferring between anodes and *** this in mind,we will classify and summarize threads of enhancing T_(+)from five aspects:lithium salts,solvents,additives,separators,and SEI based on different mechanisms,including covalently bonding,desolvation effect,Lewis acid-base interaction,electrostatic interaction,pore sieving,and supramolecular *** believe this review will present a systematic understanding and summary on T_(+)and point out some feasible threads to enhance battery performance by enhancing T_(+).

关键词： lithium batteries Li^(+)transference number rate performance strategies mechanisms

Combinatorial approaches for high-throughput characterization of mechanical properties

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Journal of Materiomics 2017年第3期3卷 209-220页

作者： Xiaokun Zhang yong xiang State Key Laboratory of Electronic Thin Films&Integrated Devices School of Energy Science and EngineeringUniversity of Electronic Science and Technology of China2006 Xiyuan AvenueWest High-Tech ZoneChengduSichuan 611731China

Since the first successful story was reported in the middle of 1990s,combinatorial materials science has attracted more and more attentions in the materials *** the past two decades,a great amount of effort has been made to develop combinatorial high-throughput approaches for materials ***,few high-throughput mechanical characterization methods and tools were *** date,a number of micro-scale mechanical characterization tools have been developed,which provided a basis for combinatorial high-throughput mechanical *** existing micro-mechanical testing apparatuses can be pertinently modified for high-throughput *** example,automated scanning nanoindentation is used for measuring the hardness and elastic modulus of diffusion multiple alloy samples,and cantilever beam arrays are used to parallelly characterize the thermal mechanical behavior of thin films with wide composition *** interpretation of micro-mechanical testing data from thin films and micro-scale samples is most critical and challenging,as the mechanical properties of their bulk counterparts cannot be intuitively extrapolated due to the well-known size and microstructure ***,high-throughput mechanical characterization data from combinatorial micro-scale samples still reflect the dependence trend of the mechanical properties on compositions and microstructure,which facilitates the understanding of intrinsic materials behavior and the fast screening of bulk mechanical *** the promising compositions and microstructure are pinned down,bulk samples can be prepared to measure the accurate properties and verify the combinatorial high-throughput characterization *** developing combinatorial high-throughput mechanical characterization methods and tools,in combination with high-throughput synthesis,the structural materials research would be promoted by accelerating the discovery,development,and deployment

关键词： Materials genome Combinatorial High-throughput Mechanical properties Structural materials

Acyclic Total Colorings of Planar Graphs without l Cycles

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Acta Mathematica Sinica,English Series 2011年第7期27卷 1315-1322页

作者： xiang yong SUN Jian Liang WU School of Statistics and Mathematics Shandong Economic University Ji'nan 250014 P. R. China School of Mathematics and Systems Science Shandong University Ji'nan 250100 P. R. China

A proper total coloring of a graph G such that there are at least 4 colors on those vertices and edges incident with a cycle of G, is called acyclic total coloring. The acyclic total chromatic number of G is the least number of colors in an acyclic total coloring of G. In this paper, it is proved that the acyclic total chromatic number of a planar graph G of maximum degree at least k and without 1 cycles is at most △（G）＋ 2 if （k, l） ∈ {（6, 3）, （7, 4）, （6, 5）, （7, 6）}.

关键词： Acyclic total coloring cycle planar graph

New progress in active immunotherapy targeting to amyloid beta

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Science China Chemistry 2015年第3期58卷 383-389页

作者： Gao Li yong-xiang Chen Yan-Mei Li Key Lab of Bioorganic Phosphorus Chemistry and Chemical Biology Ministry of Education Department of Chemistry Tsinghua University Beijing Institute for Brain Disorders

Alzheimer's disease(AD) is one of the most common types of dementia whose hallmarks include neurofibrillary tangles and senile plaques. The latter are mainly composed of amyloid-β proteins(Aβ), and it's suggested that Aβ may be the causative factor in AD pathogenesis. Immunotherapy targeting Aβ for preventing aggregation of Aβ and mildly clearing amyloid plaques has been a hot topic since 1999. Although the first clinical trial of Aβ vaccine, AN-1792, failed in phase II, its results suggested some key points in the design of Aβ vaccines. Avoiding the possible toxic Aβ specific T cell response and inducing a Th2 type cellular immune response may be beneficial for Aβ immunotherapy. Many associations and research groups are working on Aβ vaccine and some progress has been made in recent years. In this review, we have provided a detailed summary of past Aβ vaccines, which have been sorted by the immunogen, and we also discuss some recent progress and future perspectives.

关键词： Alzheimer's disease amyloid beta active immunotherapy peptide vaccine DNA vaccine

Energy of Long-Lifetime Configurations in Zero-Temperature Dynamics

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Communications in Theoretical Physics 2009年第4期51卷 671-674页

作者： RONG yong-Hui KONG xiang-Mu College of Physics and Engineering Qufu Normal University Qufu 273165 China

Using Monte Carlo method with zero-temperature dynamics, we investigate energy evolution of Ising spin configuration on a square lattice. The energies of some configurations exhibit long duration before those configurations reach the final state -- ground state or frozen stripe state. For ground-state dynamical realization, the duration occurs when the energy per spin is 4/L, where L is the lattice size. For stripe-state dynamical realization, the energy is slightly higher than 2/L when the duration appears in the last evolution stage. In addition, it is found that the average energy per spin in final state is approximately 2/3L.

关键词： Ising model zero-temperature dynamics Monte Carlo method

Individualized Pixel Synthesis and Characterization of Combinatorial Materials Chips

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Engineering 2015年第2期1卷 225-233页

作者： Xiao-Dong xiang Gang Wang Xiaokun Zhang yong xiang Hong Wang State Key Laboratory of Green Building Materials China Building Materials Academy Intematix Corporation State Key Laboratory of Electronic Thin Films & Integrated Devices School of Energy Science and Engineering University of Electronic Science and Technology of China

Conventionally, an experimentally determined phase diagram requires studies of phase formation at a range of temperatures for each composition, which takes years of effort from multiple research groups. Combinatorial materials chip technology, featuring high-throughput synthesis and characterization, is able to determine the phase diagram of an entire composition spread of a binary or ternary system at a single temperature on one materials library, which, though significantly increasing efficiency, still requires many libraries processed at a series of temperatures in order to complete a phase diagram. In this paper, we propose a "one-chip method" to construct a complete phase diagram by individually synthesizing each pixel step by step with a progressive pulse of energy to heat at different temperatures while monitoring the phase evolution on the pixel in situ in real time. Repeating this process pixel by pixel throughout the whole chip allows the entire binary or ternary phase diagram to be mapped on one chip in a single experiment. The feasibility of this methodology is demonstrated in a study of a Ge-Sb-Te ternary alloy system, on which the amorphouscrystalline phase boundary is determined.

关键词： combinatorial materials chip phase diagram pixel synthesis in-situ characterization phase-boundary determination

Protecting-group-free amination of halogenated nitrobenzaldehyde with palladium catalyst

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Chinese Chemical Letters 2010年第8期21卷 935-938页

作者： Jing Cao Jun xiang Feng yong xiang Wu Ya Ya Tuo Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education College of ChemistryXiangtan UniversityXiangtan 411105China

"One-step"method for the synthesis of secondary aliphatic amine substituted nitrobenzaldehyde was *** the presence of Pd catalyst,halogenated nitrobenzaldehyde could be smoothly coupled with secondary aliphatic amine ... 详细信息

关键词： Halogenated nitrobenzaldehyde Secondary aliphatic amines Pd catalyst