Subjects: Management Science >> Regional Economic Management Subjects: Information Science and Systems Science >> Systematology submitted time 2023-01-03
Abstract：生产性服务业发展是经济和社会现代化的一个重要特征，也是现代生产力发展的重要助推器。虽然服务业的概念已被广泛讨论，但是，没有形成严谨科学的概念定义。文章从马克思的思想出发，给出了服务的严格定义，然后以此为基础，讨论了生产性服务业的概念和外延；文章提出生产力发展的材料-动力-控制力三维度概念，从生产力发展的历史过程阐述了生产性服务业的形成和发展；文章最后受钱学森产业革命理论启发，基于三维度概念提出了新的七次产业革命观点，并指出生产性服务业在其中的作用。
Peer Review Status:
Awaiting Review
Subjects: Biology >> Biochemistry Subjects: Information Science and Systems Science >> Systematology submitted time 2022-04-05
Abstract：
For the cofactor-free 1-H-3-hydroxy-4-oxoquinaldine-2,4-dioxygenase (HOD), the dioxygen (O2) dependent steps are rate-limiting along with a spin state crossover to the singlet spin state. Here, the primary triplet O2 molecule activation on the 2-methyl-3-hydroxy-4(1H)-quinolone (MHQ) is investigated, and the catalytic role of the intersystem crossing effects is highlighted by directly comparing results from the Born-Oppenheimer dynamics and non-adiabatic surface hopping dynamics. This work confirms non-adiabatic dynamical effects are essential to modulate the O2 activation on the substrate MHQ. The time scale of the equilibration and conversion from triplet to singlet state should be in the range of a few hundreds of femtoseconds. We hope this work provides us a fresh look at the underlying physics of dioxygen activation reactions involving more than one spin state.
Peer Review Status:Awaiting Review
Subjects: Management Science >> Management Metrology Subjects: Information Science and Systems Science >> Systematology Subjects: Statistics >> Economic Statistics submitted time 2021-09-27
Abstract： Economic development and progress make the production process more and more complex. The complexity index can reflect the level of technological progress of the economic and industrial sectors. This paper revises an index of economic complexity based on Input-output Technology, which is used to analyze the industrial sector and the overall level of technological progress of regions. The empirical results show that the modified complexity index can well express the level of economic and technological progress of economic and industrial sectors, which is more reasonable than the calculation formula before the modification.
Peer Review Status:Awaiting Review
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