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Search Results: 1 - 10 of 37993 matches for " Ding Ma "
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Inverse of a matrix related to double zeta values of odd weight
Ding Ma
Mathematics , 2015,
Abstract: In this paper, we give a proof of a conjecture made by Zagier about the inverse of some matrix related to double zeta values of parity $(\mathrm{even},\mathrm{odd})$. As a result, we obtain a family of Bernoulli number identities. We further generalize this family to a more general setting involving binomial coefficients of negative arguments.
Connections between Double Zeta Values relative to $μ_N$, Hecke Operators $T_N$, and Newforms of Level $Γ_0(N)$ for $N=2,3$
Ding Ma
Mathematics , 2015,
Abstract: In this paper, we will study various connections between double zeta values relative to $\mu_N$, Hecke operators $T_N$, and newforms of level $\Gamma_0(N)$ for $N=2,3$. Those various connections generalize the well-known of Baumard and Schneps. We also give a conjecture about the Eichler-Shimura-Manin correspondence between $\mathcal{S}_k^{\textrm{new}}(\Gamma_0(2))^{\pm}$, $\mathcal{S}_k^{\textrm{new}}(\Gamma_0(3))^{\pm}$ and some period polynomial spaces.
Period polynomial relations between formal double zeta values of odd weight
Ding Ma
Mathematics , 2014, DOI: 10.1007/s00208-015-1308-7
Abstract: For odd $k$, we give a formula for the relations between double zeta values $\zeta(r,k-r)$ with $r$ even. This formula provides a connection with the space of cusp forms on $\mathrm{SL}_2(\mathbb{Z})$. This is the odd weight analogue of a result by Gangl, Kaneko and Zagier. We also provide an answer of a question asked by Zagier about the left kernel of some matrix. Although the restricted sum statement fails in the odd weight case, we provide an asymptotical statement that replaces it. Our statement works more generally for restricted sums with any congruence condition on the first entry of the double zeta value.
Solar Energy and Residential Building Integration Technology and Application  [PDF]
Ding Ma, Yi-bing Xue
International Journal of Clean Coal and Energy (IJCCE) , 2013, DOI: 10.4236/ijcce.2013.22B002

Building energy saving needs solar energy, but the promotion of solar energy has to be integrated with the constructions. Through analyzing the energy-saving significance of solar energy, and the status and features of it, this paper has discussed the solar energy and building integration technology and application in the residential building, and explored a new way and thinking for the close combination of the solar technology and residence.

Bioconjugates of Glucose Oxidase and Gold Nanorods Based on Electrostatic Interaction with Enhanced Thermostability
Ma Zhanfang,Ding Teng
Nanoscale Research Letters , 2009,
Abstract: Bioconjugates made up of an enzyme and gold nanorods (GNRs) were fabricated by electrostatic interactions (layer-by-layer method, LBL) between anionic glucose oxidase (GOD) and positively charged GNRs. The assembled processes were monitored by UV–Vis spectra, zeta potential measurements, and transmission electron microscopy. The enzyme activity assays of the obtained bioconjugates display a relatively enhanced thermostability behavior in contrast with that of free enzyme. Free GOD in solution only retains about 22% of its relative activity at 90 °C. Unexpectedly, the immobilized GOD on GNRs still retains about 39.3% activity after the same treatment. This work will be of significance for the biologic enhancement using other kinds of anisotropic nanostructure and suggests a new way of enhancing enzyme thermostability using anisotropic metal nanomaterials.
Uniqueness of solutions for fourth-order nonlocal boundary value problems
Johnny Henderson,Ding Ma
Boundary Value Problems , 2006, DOI: 10.1155/bvp/2006/23875
Abstract: Uniqueness implies uniqueness relationships are examined among solutions of the fourth-order ordinary differential equation, y(4)=f(x,y,y ¢ € 2,y ¢ € 3,y ¢ € ′), satisfying 5-point, 4-point, and 3-point nonlocal boundary conditions.
Uniqueness of solutions for fourth-order nonlocal boundary value problems
Henderson Johnny,Ma Ding
Boundary Value Problems , 2006,
Abstract: Uniqueness implies uniqueness relationships are examined among solutions of the fourth-order ordinary differential equation, , satisfying -point, -point, and -point nonlocal boundary conditions.
Defining Least Community as a Homogeneous Group in Complex Networks
Bin Jiang,Ding Ma
Physics , 2015, DOI: 10.1016/j.physa.2015.02.029
Abstract: This paper introduces a new concept of least community that is as homogeneous as a random graph, and develops a new community detection algorithm from the perspective of homogeneity or heterogeneity. Based on this concept, we adopt head/tail breaks - a newly developed classification scheme for data with a heavy-tailed distribution - and rely on edge betweenness given its heavy-tailed distribution to iteratively partition a network into many heterogeneous and homogeneous communities. Surprisingly, the derived communities for any self-organized and/or self-evolved large networks demonstrate very striking power laws, implying that there are far more small communities than large ones. This notion of far more small things than large ones constitutes a new fundamental way of thinking for community detection. Keywords: head/tail breaks, ht-index, scaling, k-means, natural breaks, and classification
The Present Status and Future of Research of the East Asian Monsoon
The Present Status and Future of Research of the East Asian Monsoon

Ma Henian,Ding Yihui,
Ma Henian
,Ding Yihui

大气科学进展 , 1997,
Abstract: The weather and climate in China are greatly affected by the East Asian monsoon. For long time the Chinese meteorologists have undertaken numerous works regarding research and prediction or the East Asian monsoon, and made great achievements that are well noted for the world and in China. In the future 5-10 years, the research on the East Asian monsoon will be strengthened and the thus obtained achievements will be gradually transferred into the operational capability, eventuallyleading to an improvement of weather and climate prediction in East Asia The present paper has firstly made an overview of the present status of research on the East Asian monsoon, il?lustrating the 4-stage developmental process of monsoon study in China and major achievements thus obtained. Then the major problems related to the study of the East Asian monsoon are scientifically indicated, and the monsoon-related ongoing and future scientific field experiments and study projects the Chinese scientists have initiated or participated are briefly described. It may be expected that a new breakthrough in the problem of the East Asian mon?soon in the future ten years will be made with these efforts and intensive research works. Finally, it is pointed out that, to accomplish this new breakthrough, a key problem is to carry out the extensive cooperation, in particular the scien?tific cooperation of the scientist across the Taiwan Strait as well as countries over the surrounding regions.
Enrichment of Phosphate on Ferrous Iron Phases during Bio-Reduction of Ferrihydrite  [PDF]
Qingman Li, Xingxiang Wang, Dan Kan, Rebecca Bartlett, Gilles Pinay, Yu Ding, Wei Ma
International Journal of Geosciences (IJG) , 2012, DOI: 10.4236/ijg.2012.32033
Abstract: The reduction of less stable ferric hydroxides and formation of ferrous phases is critical for the fate of phosphorus in anaerobic soils and sediments. The interaction between ferrous iron and phosphate was investigated experimentally during the reduction of synthetic ferrihydrite with natural organic materials as carbon source. Ferrihydrite was readily reduced by dissimilatory iron reducing bacteria (DIRB) with between 52% and 73% Fe(III) converted to Fe(II) after 31 days, higher than without DIRB. Formation of ferrous phases was linearly coupled to almost complete removal of both aqueous and exchangeable phosphate. Simple model calculations based on the incubation data suggested ferrous phases bound phosphate with a molar ratio of Fe(II):P between 1.14 - 2.25 or a capacity of 246 - 485 mg·P·g-1 Fe(II). XRD analysis indicated that the ratio of Fe(II): P was responsible for the precipitation of vivianite (Fe3(PO4)2·8H2O), a dominant Fe(II) phosphate mineral in incubation systems. When the ratio of Fe(II):P was more than 1.5, the precipitation of Fe(II) phosphate was soundly crystallized to vivianite. Thus, reduction of ferric iron provides a mechanism for the further removal of available phosphate via the production of ferrous phases, with anaerobic soils and sediments potentially exhibiting a higher capacity to bind phosphate than some aerobic systems.
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