Research on the Outlook and Solutions in the Development of Marathon Series in China

Today, Marathon Series rise gradually and grow fast, and their development brings undeniable influences, even can drive the development of a city in every aspect, playing an incredible catalytic role in the regional development. The author deeply explored the status and laws of the development of Marathon Series in our country through literature material laws, field investigation and expert interview survey and believes: Marathon Series can even stimulate enthusiasm among common people in running a marathon, can enhance communication and connection between cities, can better promote balanced development between each territory and plays a proactive role in the establishment of Marathon brand; for the future development of Marathon Series in our country, we should vigorously implement “Internet plus” strategies adapt to the era, prepare cooperation programs for the race well, make a plan as sufficiently as possible, actively carry out innovation and realize sustainable development, with a view to contributing fresh strength to the profound and long-lasting development of marathon business and even sport industry in our country as well as the Healthy China 2030 initiative

Tetra­kis(μ-naphthalene-1-acetato-κ2 O:O′)bis­[(N,N-dimethyl­formamide-κO)copper(II)]

The asymmetric unit of the title compound, [Cu2(C12H9O2)4(C3H7NO)2], contains two independent centrosymmetric dinuclear copper(II) complexes. The central paddle-wheel units are formed by four bridging bidentate naphthalene-1-acetate ligands with two dimethyl­formamide ligands in the axial positions. The unique CuII ions have slightly distorted square-pyramidal coordination geometries. One of the naphthalene rings is disordered over two sets of sites, with refined occpancies of 0.535 (4) and 0.465 (4)

An Improved Electrical Switching and Phase-Transition Model for Scanning Probe Phase-Change Memory

Scanning probe phase-change memory (SPPCM) has been widely considered as one of the most promising candidates for next-generation data storage devices due to its fast switching time, low power consumption, and potential for ultra-high density. Development of a comprehensive model able to accurately describe all the physical processes involved in SPPCM operations is therefore vital to provide researchers with an effective route for device optimization. In this paper, we introduce a pseudo-three-dimensional model to simulate the electrothermal and phase-transition phenomena observed during the SPPCM writing process by simultaneously solving Laplace’s equation to model the electrical process, the classical heat transfer equation, and a rate equation to model phase transitions. The crystalline bit region of a typical probe system and the resulting current-voltage curve obtained from simulations of the writing process showed good agreement with experimental results obtained under an equivalent configuration, demonstrating the validity of the proposed model