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The supervision of grain reserves is a major event of national food security. China has built the largest grain internet of things in the world. Although there are still have some problems such as low data quality, low utilization rate, and serious information islands, it still provides a basis for conducting digital supervision on grain reserves. On the basis of studying the multi-fields coupling and biological theory in stored grain ecosystems, the author team proposed the continuity, periodicity and coordination principles of the digital supervision of grain reserves, and further proposed 7 intelligent strategies using the big data analysis of grain situation and the intelligent analysis method of 10 modes of grain storage in the granary. In combination with the application cases of 10 provinces that participated in the policy oriented inventory check of grain reserves organized in 2018, this paper analyzes the principle of digital supervision of grain reserves and 7 intelligent methods, which will accelerate the transformation and large-scale promotion of relevant technological achievements, and accelerating the construction of a high-quality technical system for grain reserves supervision. This digital intelligence method will promote the transformation of grain reserve management from “human management" to "technology management”, and let data play its due role in grain reserve decision-making and management.

Based on the implementing grain security projects and instituting other relevant grain security policies, China has promoted the process of digitalization and intelligence of grain storage and built the world's largest grain Internet of Things, since the 18th National Congress of the Communist Party of China. But, the resulting large amount of grain data, mainly based on temperature, can not effectively support decision-making and management on grain storage. Based on the study of the multi-field coupling theory of grain pile ecosystem, our research team further extracted the continuity principle, periodicity principle, and coordination principle of digital supervision of grain reserves, and proposed a series of intelligent strategies such as AID, ABC, 6R, SIN, CAE, O, and U. However, the application of these strategies directly faces the original data, which has some problems such as low efficiency and large error. To apply the intelligent strategies efficiently and correctly, the basic data manual of intelligent analysis of grain condition has been developed, according to the original grain condition data of typical granaries and main grain varieties in different grain storage ecological regions in China. The development of this manual is expected to consolidate the foundation of intelligent analysis of grain situation, which could promote the digital monitoring of grain storage quantity and quality, and realize the transformation from "manual defense" to “technical defense”.

The microRNA is a kind of small non-coding RNA, which can cause target mRNA degradation or translation inhibition. Reactive oxygen species(ROS)represent the main active product of redox. It has been reported that ROS are involved in different signaling pathways to keep cell stability. The imbalance of ROS in cell is closely related to tumorigenesis. In the progress of occurrence and development of human glioma, microRNAs and ROS can affect cell proliferation, apoptosis, invasion, migration, and resistance to chemotherapy as well as radiotherapy. Therefore, to understand the mechanism of miRNA on ROS may lead to a potential strategy for glioma treatment.

This paper focuses on revealing the thermal decomposition behaviors of a self‐intumescent flame retardant (IFR) epoxy (EP) resin (EP/15%APP‐Cu2O) employing 12 wt% ammonium polyphosphate (APP) as a halogen‐free flame retardant and 3 wt% copper (I) oxide (Cu2O) as char forming rate regulator. Initially, the thermal stability of EP/15%APP‐Cu2O was analyzed and compared to virgin EP resin and flame retardant EP (EP/15%APP) containing 15 wt% APP as flame retardant by thermogravimetric analysis test at different heating rates under nitrogen atmosphere. It was shown that the incorporation of APP altered the decomposition pathway of EP and decreased the onset decomposition temperature. Luckily, compared to EP/15%APP, the onset decomposition temperature of EP/15%APP‐Cu2O was just slightly reduced from 300.4 to 292.8°C. Then, the thermal degradation kinetics of EP, EP/15%APP and EP/15%APP‐Cu2O were further evaluated by Kissinger and Flynn‐Wall‐Ozawa methods. It was worth noted that the addition of APP or APP‐Cu2O enhanced the thermal degradation activation energies of EP, which contributed to the protective effect of the char formation. Particularly, the incorporation of 3 wt% Cu2O significantly decreased the thermal degradation activation energies at the early decomposition stage of EP. This may be the main contribution for intumescent char formation, which resulted in higher fire safety of EP/15%APP‐Cu2O compared to EP/15%APP. These information can potentially help to develop alternative IFR systems. [ABSTRACT FROM AUTHOR]

In order to foster students' professional skill and quality, a practical teaching system is designed to meet the actual working requirement of urban rail transportation. By adopting innovative perspectives, ideas, methods and techniques, the construction of urban railway transportation major in vocational college is presented in this paper. The practical educational mechanism of production, learning and research is introduced. The method of carrying into execution is researched. Based on the synergy effect, cooperative multi-level teaching platform is designed. The practical teaching scheme, instruction program of urban railway transportation, teaching design and concrete implement method are also researched. The integrated practical teaching system of urban railway transportation automatic train control is framed. Characteristics of project instructional method and situational teaching method are illustrated. By setting up practical teaching solution and the guarantee mechanism of engineering major which keeps pace with urban railway transportation industry, the share of information, construction and training are achieved. [ABSTRACT FROM AUTHOR]