In China, the promulgation of a green power identification system has gradually shifted from electricity power generation to consumption. However, there is no mature digital identification system for green power consumption enterprises. Exploiting the open, transparent, and immutable characteristics of blockchains, this study establishes a digital identification system for green power consumption based on blockchain technology. This system uses expert scoring and the entropy weight method as the evaluation algorithm for the green power consumption chain, issues non-fungible tokens as digital identification for consumption enterprises, and realizes the automatic generation of identification through smart contracts. These functions guarantee the credibility of the certification process and the uniqueness of the generated identification. The results of the experiments show that, in the case of multi-user concurrent requests, the number of concurrent users that the system could handle at optimal processing efficiency was 500, and block generation was stable. The proposed system has high practicability and stability.

2022年以来我国出台了一系列政策,建立健全绿电绿证制度,促进绿电绿证市场建设,推动全社会和重点企业加大绿色电力消费力度.构建全国统一的绿色电力消费认证体系,是实现可再生能源消费基础凭证作用的关键抓手,是助力提升社会对绿色电力消费认可度和全国统一电力市场建设的重要举措.本文分析对比了国内外绿色电力认证的标准与方法,分析我国当前绿电消费的认证需求,提出基于国情的认证体系构建思路,为构建绿电消费认证体系,促进绿色电力消费提供参考.

By virtue of its open, shared and collaborative technical form, blockchain technology is highly compatible with the strategic goal of building an energy Internet. it is an important technical basis for the transformation of energy and power. However, the lack of blockchain standards makes the application and promotion of blockchain technology lack effective guidance and norms, which seriously restricts the development of energy and power blockchain. First of all,the standardization status of blockchain technology and its application in the field of energy and power at home and abroad was comprehensively reviewed, and the deficiencies of the current situation was point out. Thus, the compatibility of blockchain technology in typical application scenarios of the energy Internet was analyzed, and its standardization requirements and standardization objects was sort out in accordance with the GB/T 12366-2009 comprehensive standardization work guide. Finally, the ideas and paths for standard development to improve the energy and power block were given. The standardization and standardization level of blockchain technology application will be improved.

At home and abroad, preliminary studies have been carried out on the evaluation and identification of green power consumption level, but they are all electricity certification oriented to the generation side, and lack of certification and identification system oriented to the green power consumption side to evaluate the consumption behavior of green power users. An evaluation index system for green electricity consumption identification were designed, which includes three aspects: consumption fluctuation, consumption level, and environmental benefits, with a total of 10 indicators. By combining the subjective and objective methods of Analytic Hierarchy Process and Entropy Weight, the indicator weights were determined, and the weighted TOPSIS method was used to construct a multi-attribute coordinated and graded evaluation model for green power consumption, which supports rapid evaluation and verification of enterprise green power consumption levels and attributes. Six typical industrial users were selected as the research subjects, and the scores of each user indicator were calculated through the established evaluation model to characterize the comprehensive level of green electricity consumption of users. This provides a basis for designing corresponding scoring systems for different user indicators in the future.

Focusing on the demand for building a national unified certification system for green power consumption,this paper analyzed the current certification and standardization needs of green power consumption in China,and also proposed a certification system construction approach that is in line with China's national conditions.This paper proposed standardization work ideas from four aspects:standard system planning and development,standard implementation,standardization internationalization and standardization promotion path,which provides reference for the standardization of the construction of a unified green electricity consumption certification system.

We did some research on the surface structures of the NaY zeolite,USY zeolite and porous γ-Al2O3 by positron annihilation lifetime spectroscopy in low temperature of 20-300 K.We measured the positron lifetimes of the three dehydration samples in low temperature respectively,in which,the lifetime spectra of NaY and USY were resolved into five components,and that of the γ-Al2O3 were resolved into four components.The results showed that the shorter lifetimes were not relative to the measure temperature,but the longest lifetime(about 40 ns) was relative to the measure temperature.The different relativity of the lifetime-temperature means the different surface structures of the NaY zeolite from that of the porous γ-Al2O3.

An auto-scoring system of experimental teaching with virtual oscilloscope based on LabVIEW is designed in this paper.The scoring model is built on the general process of the teaching of the oscilloscope experiment,and the process of human judgment,and the record analysis of the experiment operation as well as the measured results by the virtual oscilloscope.The teaching results show that the auto-scoring system can effectively assist the teachers in guiding the teaching of the oscilloscope experiment of individual students,track the whole operational process and make the scores of experiment more objective.

基于对本科大四学生关于虚拟仪器的问卷调查及相应的分析,展示了当今大学生对于虚拟仪器的了解程度,并据此提出开展虚拟仪器实验教学的建议。