Determination of pion distribution amplitudes from the electromagnetic form factor with the data-driven dispersion relation

We study the pion electromagnetic form factor in the modulus squared dispersion relation, and do the model independent extraction of the most important nonperturbative parameters in pion light-cone distribution amplitude. The motivation of this work is the recent measurement of timelike form factor in the resonant regions, which makes up the piece lacking solid QCD-based calculation. With the perturbative QCD calculation up to next-to-leading-order QCD corrections and twist four level of meson distribution amplitudes, we obtain the chiral mass of pion meson as $m_0^\pi(1 \, {\rm GeV}) = 1.31^{+0.27}_{-0.30} \, {\rm GeV}$. More accuracy measurement of the timelike form factor are desirable to help us to determine the lowest gegenbauer moments in pion distribution amplitudes with the data-driven dispersion relation method developed in this work.Comment: 9pages, 6 figures, 1 tabl

STUDY ON A MODEL OF THE EQUIPMENT MRO SERVICE INFORMATION SYSTEMS

The MRO(Maintenance、Repair and Operations) System for the Large Equipment has been becoming a strong support pattern for the agile service support. To build agile service system and identify a portfolio of computer-based integrated applications, a cross-enterprise strategic information systems planning (SISP) is a key concern. An integrated framework for a large equipment support system service chain is analyzed and Strategic information systems planning task is discussed. Integrated the cross-enterprise business process component and inter-organization management policy, the strategic information systems model for a large equipment MRO service support system is proposed. Key words: Strategic information systems, MRO, Service chai

In silico profiling of cell growth and succinate production in Escherichia coli NZN111

Additional file 6. Reactions histograms for NZN111 at distinct upper and lower bounds of reaction EX_succ(e)

Aqua­(benzene-1,2-dicarboxyl­ato-κO)bis­[2-(1H-pyrazol-3-yl-κN 2)pyridine-κN]cadmium(II)

In the mononuclear title complex, [Cd(C8H4O4)(C8H7N3)2(H2O)], the CdII atom is six-coordinated in a distorted octa­hedral geometry by four N atoms from two bidentate chelating 2-(1H-pyrazol-3-yl)pyridine ligands, one O atom from a benzene-1,2-dicarboxyl­ate ligand and one water mol­ecule. The mol­ecular structure features intra­molecular O—H⋯O and N—H⋯O hydrogen bonds. In the crystal structure, the complex mol­ecules are assembled into a two-dimensional supra­molecular layer parallel to (011) via O—H⋯O and N—H⋯O hydrogen bonds and π–π stacking inter­actions between the pyridyl and pyrazole rings [centroid–centroid distances = 3.544 (2) and 3.722 (3) Å]

Structural evolution and characterization of organic-rich shale from macroscopic to microscopic resolution: The significance of tectonic activity

Shale gas exploration and development have taken significant strides in the relatively straightforward intra-basin stability zone and intra-basin weak deformation zone of marine shale in the Sichuan Basin, South China. In addition, the extra-basin strong tectonic modification zones have been actively explored. However, the results have been limited, which reveals the complexity of shale gas formation and preservation conditions in the context of multi-scale geological processes. These tectonic geological conditions have a significant impact on the shale gas content, while it has been difficult to figure out how tectonic deformation modifies reservoir structure and what specific mechanism causes shale gas content anomalies. Based on subjecting geologic samples to combined high-temperature and high-pressure experiments, this study summarizes the tectonic constraint mechanism of shale petrophysical structure evolution and its impact on shale gas storage, reveals the intrinsic connection and mechanism of shale pore-fracture and organic matter, inorganic mineral particle structure evolution and tectonic stress, and identifies the remodeling mechanism of the shale reservoir physical property change. The findings contribute to the theory of shale deformation and gas accumulation, as well as offer a scientific foundation for the exploration of marine shale gas in the complex tectonic zones outside the Sichuan Basin.Document Type: PerspectiveCited as: Gao, J., Li, X., Cheng, G., Luo, H., Zhu, H. Structural evolution and characterization of organic-rich shale from macroscopic to microscopic resolution: The significance of tectonic activity. Advances in Geo-Energy Research, 2023, 10(2): 84-90. https://doi.org/10.46690/ager.2023.11.0

通胀及通胀预期冲击的动态特征分析

Current and future inflation in China are both dominated by inflation expectation and inertia, but dramatic instability of inflation expectation put directly negative impact on effects from inflation management policies. This paper, by applying ARMA and GARCH models, studies dynamics of shocks from inflation and its expectation, and the empirical results indicate that: (1) rational expectation and inertia are separate factors influencing inflation, and disturbance on inflation shows persistent, cyclical and cyclical lag characteristics; (2) shocks from inflation expectation show persistence, and disturbance on inflation strengthens expectation oscillation; (3) the shocks exist asymmetry, which implies that people’s expectation is more sensitive to undervaluation of expectation instability. Policies suggestion from empirical results root that expectation leads are the limited approach for realizing inflation targets and inflation management policies must be prudent