Pyrolysis of methane is a carbon-economic method to obtain valuable carbon materials and COx- free H2, under the carbon peaking and carbon neutrality goals. In this work, we propose a methane pyrolysis process to produce graphite and H2 using bubble column reactor containing NiO/Al2O3 and NaCl–KCl (molten salt). The process was optimized by the different amounts of NaCl–KCl, the CH4/ Ar ratio and temperature, indicating that the CH4 conversation rate could reach 92% at 900 °C. Meanwhile, we found that the addition of molten salt could obtain pure carbon materials, even if the conversation rate of CH4 decreases. The analysis of the carbon products revealed that graphite could be obtained.

현재 관광 산업과 문화 사업이 번성하는 대배경 하에, 유적지 기념 경 관의 가치는 국가 문화 공원 건설 과정에서 더욱 돋보여야 한다. 본 연 구는 문화 경관 이론의 관점에서, 쓰촨 원촨 대지진 유적 공원을 기념 관광 고전 지구로 삼아 연구 대상으로 하여, 유적 기념 경관에 대한 관 광객 지각의 구조 방정식 모델을 구축한다. 설문조사를 통해 관련 수칙 을 얻고 분석하였다. 연구 결과, 지각된 가치가 관광객 만족도와 긍정적 인 상관관계가 있으며, 만족도를 통해 간접적으로 충성도에 영향을 미친 다는 것을 발견했다. 지각된 품질과 전체 이미지는 지각된 가치의 중요 한 요소이며 서로 영향을 미친다. 지각된 품질은 경관, 교육, 서비스의 3 가지 차원을 포함하며, 유적지 본체 외에도, 관광객들은 경관 조각, 경관 장치, 상징적 경관, 문화 창조 제품 및 교육 체험에 대한 지각이 높아, 지각된 가치를 향상시키는 중요한 요소이다. 전체 이미지는 인지 및 감 정의 2가지 차원을 포함하며, 지각된 가치를 통해 간접적으로 충성도에 영향을 미친다. 이러한 연구 결과를 바탕으로, 사례 지역에서 관광객 지 각을 향상시키기 위한 대책 및 제안을 시도하였다.

On October 29, 2020, the Fifth Plenary Session of the 19th Central Committee of the Communist Party of China (CPC) pointed out that traditional and non-traditional security should be coordinated, and security development should be integrated into all areas and processes of national development. Terrorism as an escalating threat factor in non-traditional security issues, anti-terrorism has become an important component of maintaining social security and stability, safeguarding people's lives and implementing national security strategy. Focusing on the "14th five-year plan" and the overall national security concept, through analyzing the overall environment of China's current counter-terrorism intelligence, and using the PEST-SWOT model to probe into the strengths and weaknesses of China's counter -terrorism intelligence information security. A scientific and reasonable international coordination and Cooperation Mechanism of counter-terrorism intelligence is put forward to provide an important guarantee for the modernization of counter-terrorism intelligence system and adherence to the overall national security concept.

The study presented in the article is focused on use of graphene obtained by novel microwave-enhanced chemical vapor deposition (MECVD) method as a construction material for 3D porous structures—aerogels and sponges. MECVD graphene nanoplatelets-based aerogels were obtained by mixing MECVD graphene nanoplatelets and chitosan, dissolved in 3% acetic acid followed by its freeze drying and carbonization at 800° in inert medium. Surface morphology of aerogels was characterized by SEM. MECVD graphene nanoplatelets-based aerogels are characterized by a porous structure; they are superhydrophobic and possess high sorption capacity with regard to organic liquids of different densities. Polyurethane sponges coated with MECVD graphene can serve as an alternative to aerogels. The process of their obtaining is cheaper and less complicated. They were obtained by facile “dip-coating” method, modifying its surface to increase its hydrophobicity. The resulting sponges are superhydrophobic and superoleophilic, and demonstrate high rate of sorption of organic liquids and can be easily regenerated by squeezing. In addition, they can be used as a separating material in conjunction with vacuum system for continuous and selective collection of organic liquids from the surface of water.

In this paper, the long-term hemispheric variation of the polar faculae is investigated. It is found that, (1) both the N-S asymmetry and N-S asynchrony of the polar faculae exhibit a long-term persistence, which suggests that they should not be regarded as a stochastic phenomenon; (2) both the N-S asynchrony and N-S asymmetry of the polar faculae are functions of the latitude, implying that the N-S asynchrony of the polar faculae is related to the N-S asymmetry of the polar faculae; (3) from a long-term view, the dominant hemisphere of the polar faculae seems to have close connection with the phase-leading hemisphere of the polar faculae.

MicroRNAs (miRNAs) are endogenous non-coding genes that participate in post-transcription regulation by either degrading mRNA or blocking its translation. It is considered to be very important in regulating insect development and metamorphosis. Insects are the largest group of animals and are extremely valuable in biological and agriculture research. Insects are also important pests to human health and agriculture, and efforts are necessary protect both humans and plants from disease and damage. Despite their importance, insects lag behind mammals, nematodes, and plants in miRNA research. At present, only 279 insect miRNAs have been identified from Drosophila melanogaster, Anopheles gambiae, Apis mellifera, Bombyx mori, and D. pseudoobscura in miRBase, and most of these miRNAs were computationally predicted without experimental validation. Functional analysis of insect miRNAs has only been conducted in D. melanogaster.