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With a high percentage of new energy scenarios, it has become a trend for flexible resources such as energy storage systems to participate in long-term planning. In this context, it is important to explore how energy storage systems are configured. Therefore, it is necessary to analyse the economics of energy storage and other resources to ensure that investments in energy storage and other resources are economically valuable under different future models. This paper firstly analyses the current situation of a high percentage of new energy in China, and secondly constructs a model for analysing the economics of flexible regulation resources such as energy storage. Under partial data based on the scenery storage project, the economic analysis under four models is derived, including cost and benefit analysis, investment benefit analysis, and break-even point analysis. Finally, the economic evaluation of investment in energy storage projects under different models is summarized based on the calculation results.It is concluded that different scenario models have different economic benefits, and the operation capacity of the four scenarios is higher than that of the existing models.

Many concrete structures in use have safety problems due to material deterioration, actual construction defects, structural damage, etc. Therefore, nondestructive testing is required to determine the presence of defects. Ultrasonic technology is an important tool in nondestructive testing, which can detect defects in concrete and be combined with other methods or models to make it more accurate. At present, ultrasonic inspection technology has been more research at home and abroad, both in theory and in engineering, and there has been great progress. This paper summarizes the latest progress of ultrasonic inspection technology for concrete structures at home and abroad respectively, and points out the future development trend.

The construction of the digital energy internet is of great significance to the formation of the global energy internet. This paper uses the Rongchuang park of state grid Lanzhou power supply company as an example. Particularly, the key techniques from “source, grid, load, and storage” were summarized. It is key for the building of the energy internet Rongchuang park to increase the proportion of clean energy production and consumption, improve the intelligent level of the power grid, fully tap the potential of load side energy conservation and peak shaving regulation, and promote the system flexibility by energy storage techniques. This work supports the technological development and breakthrough of the energy internet park.

The setting direction of the evaluation indicators in the current research and the differences of the research methods in terms of principles, advantages and disadvantages and applicability are compared and analyzed. The results show that the current well-facilitated farmland construction has achieved remarkable results. In the suitability evaluation research before project construction, the setting of evaluation indicators focuses more on the natural endowment conditions of regional cultivated land; in the benefit evaluation research after project construction, from The early focus on economic benefit evaluation has gradually developed into an equal emphasis on economic, social and ecological benefit evaluation; in the analysis of influencing factors, the current research is still relatively weak, and there are still few explanations for the differences in the level of benefit improvement in different construction areas. Regarding research methods, future research should comprehensively consider the advantages, disadvantages and applicability of different methods. This study can provide a useful reference for scientifically promoting well-facilitated farmland construction.

The theory of Emotion Coaching was put forward by Feng Menglong in Late-Ming Dynasty. Since Mid-Ming, the cognition of Ch’ing (emotion) has gone through three phases: rediscovery, development, and explanation on the level of the mind. Deeply influenced by Yangming, the theory of Emotion Coaching focuses neither on Ch’ing (emotion) nor on Li (justice) but the balance of the two. That “Ch’ing (emotion) is the basis of Li (justice) and Li (justice) is the criterion of Ch’ing (emotion)” is taken as the tenet of the theory, which means that Ch’ing (emotion) gives rise to moral behaviour and Li (justice) is the standard. The book The History of Ch’ing (《情史》) fully reflects the theory. Separating emotion and desire, Li (justice) is different from Li (rite). The former is based on human nature. Justice and destiny are the two important principles, rather than the political purposes which infuse the latter. The theory of Emotion Coaching is also reflected in the collection of short novels San Yen (“三言”). In the novel, the details of emotion are fantastic, trying to make sense of emotional varieties. Affective and wanton behaviour are shown differently in order to illustrate the discrepancy between emotion and desire. Justice and destiny are also emphasized. Chiang Hsingge Regained His Pearl Shirt (《蒋兴 哥重会珍珠衫) serves as an example here.

The mixtures of 2 M 1,4-butanediamine (BDA) and 4 M 2-(diethylamino)-ethanol (DEEA) have been found to be promising biphasic solvents. This work identifies the composition of the lower phase using a DX-120 Ion Chromatograph (IC) and a Metrohm 809 Titrando auto titrator. The cyclic capacities, cyclic loadings and reaction products of the biphasic solvent are compared with those of the aqueous solution with the same amine concentration as the lower phase of the biphasic solvent at the rich loading ((2B4D)L) using a fast screening facility and a JNM ECA-600 Nuclear Magnetic Resonance spectrometer (NMR). Their absorption rates at different loadings are also investigated using a Wetted Wall Column (WWC). The results show that the cyclic capacity and cyclic loading of (2B4D)L are almost the same as those of 2B4D. The absorption rate of (2B4D)L is higher than 2B4D at all the 3 tested loadings, except for the fresh solutions at CO2 pressure lower than 10 kPa. NMR results show that the reaction products of (2B4D)L had more BDA bicarbamate, less BDA and less BDA carbamate than 2B4D. The CO2 reaction products of (2B4D)L had twice as much carbonate/bicarbonate as with 2B4D and less BDA carbamate.

Dissolved organic matter (DOM) in both high As groundwater and low As groundwater were sampled from the Hetao basin and characterized by FT-ICR-MS for OM molecular characteristics. Results show that the greater number of molecular formulas was identified in DOM of high As groundwater (5125), compared to the number in DOM of low As groundwater (3603). Among them, lignins and aromatic structures were the most abundant compounds in both high As groundwater and low As groundwater, with 4434 formulas and 2944 formulas identified, respectively. The number of biodegradable compounds (aliphatic/proteins, lipids, and carbohydrates) was less in high As groundwater (197) than that in low As groundwater (279). Higher proportion of lignins and aromatic structures (86.5%) would lead to complexation between As and DOM, which enhanced As mobility. On the other hand, higher proportion of lignins and aromatic structures and lower proportion of bioavailable compounds in high As groundwater supported the hypothesis that more bioavailable compounds were consumed and resulted in the enrichment of lignins and aromatic structures and As release into groundwater.

Groundwater showed a trend from oxic-suboxic conditions in the alluvial fan to anoxic conditions in the flat plain in the Hetao basin, with increases in As, Fe2+, NH4+, alkalinity and pH, and decreases in Eh and NO3-. A 1D reactive transport model was constructed using a model flow column by PHREEQC to quantitatively interpret geochemical processes related to As mobilization in a 5000 m-long hydrogeological unit. Results indicated that groundwater As concentration was mostly controlled by Fe(III) oxide reduction and As adsorption processes. Observed Fe2+ was the combination of Fe(III) oxide reduction and mackinawite/siderite precipitation. Increasing alkalinity was the result of oxidation of organic carbon, rather than the dissolution of carbonates.