How environmental policy stringency affects renewable energy investment? Implications for green investment horizons

Renewable energy has many benefits, but the most important is its ability to reduce our carbon emissions and help protect the environment. This study looks into the nonlinear effects of environmental policy stringency (EPS) on renewable energy investment in BRICS. To probe the short- and long-term connection, we exploited the nonlinear panel QARDL framework. According to the analysis's results, renewable energy investment rises at nearly all quantiles in response to both short- and long-run positive shocks in EPS. The long-run negative shocks in EPS reduce renewable energy investments at lower and medium quantiles only, whereas the short-term negative shocks in EPS significantly reduce renewable energy investment at most quantiles. At all quantiles, the short and long-run Wald test validates the dissimilar effect of EPS on renewable energy investment. Consequently, policymakers should distinguish between positive and negative shocks in the EPS when considering the effect of EPS on renewable energy investment.     

在线更新的信息强度引导启发式Q学习

针对强化学习收敛速度慢的问题,提出可在线更新的信息强度引导的启发式Q学习算法。该算法在启发式强化学习算法的基础上引入依据每次训练回报情况进行在线更新的信息强度,通过结合强弱程度不同的动作信息强度更新的启发函数和状态-动作值函数来确定策略,从而提高算法收敛速度。给出该算法并对其收敛性进行证明,同时针对不同仿真环境和参数设置进行路径规划的仿真对比实验以验证其性能。实验结果表明信息强度引导的启发式Q学习算法能更快地得到回报较高的策略且不会陷入局部收敛,能够有效提高算法的收敛速度。     

柿子膳食纤维饮料加工研究

本试验通过对柿子膳食纤维饮料的研究，采用广西恭城月柿为原料，利用最优混合设计探讨饲料中果汁，酸，稳定剂，糖用量作为主要考察因素，建立四元二次回归方程，经过计算机模拟优得到果汁，酸，稳定剂，糖用量合理的最佳的配方；加工成产品，经评分及系统分析；确定柿果的脱涩方法，并对柿子膳食纤维的测定方法进行研究，分别测定了TDF（总膳食纤维），SDF（水溶性膳食纤维），IDF（不溶性膳食纤维）三者的含量；另外还探讨了柿子膳食纤维饮料的色，香，味保持问题。     

直接空冷机组夏季降负荷原因及解决方法

直接空冷机组在夏季高温时会出现不同程度降负荷的现象,分析了机组降负荷的原因并提出了解决方法。     

Impact of COVID-19 confinement on eating behaviours across 16 European countries: The COVIDiet cross-national study

We aimed to evaluate the changes in eating behaviours of the adult population across 16 European countries due to the COVID-19 confinement and to evaluate whether these changes were somehow related to the severity of the containment measures applied in each country. An anonymous online self-reported questionnaire on socio-demographic characteristics, validated 14-items Mediterranean diet (MedDiet) Adherence Screener (MEDAS) as a reference of a healthy diet, eating and lifestyle behaviours prior to and during the COVID-19 confinement was used to collect data. The study included an adult population residing in 16 European countries at the time of the survey. Aggregated Stringency Index (SI) score, based on data from the Oxford COVID-19 Government Response Tracker, was calculated for each country at the time the questionnaire was distributed (range: 0–100). A total of 36,185 participants completed the questionnaire (77.6% female, 75.2% with high educational level and 42.7% aged between 21 and 35 years). In comparison to pre-confinement, a significantly higher adherence to the MedDiet during the confinement was observed across all countries (overall MEDAS score prior to- and during confinement: 5.23 ± 2.06 vs. 6.15 ± 2.06; p < 0.001), with the largest increase seen in Greece and North Macedonia. The highest adherence to MedDiet during confinement was found in Spain and Portugal (7.18 ± 1.84 and 7.34 ± 1.95, respectively). Stricter contingency restrictions seemed to lead to a significantly higher increase in the adherence to the MedDiet. The findings from this cross-sectional study could be used to inform current diet-related public health guidelines to ensure optimal nutrition is followed among the population, which in turn would help to alleviate the current public health crisis.