Short-term Load Forecasting Model for Microgrid Based on HSA-SVM

Short-term load forecasting for microgrid is the basis of the research on scheduling techniques of microgrid. Accurate load forecasting for microgrid will provide the necessary basis for cooperative optimization scheduling. Short-term loadforecasting model for microgrid based on support vector machine(SVM) is constructed in this paper. The harmony search optimization algorithm(HSA) is used to optimize the parameters of the SVM model, because it has the advantages of fast convergence speed and better optimization ability. Through the simulation and test of the actual microgrid load system, it is proved that the short-term loadforecasting model for microgrid based on HSA-SVM can effectively improve the prediction accuracy

Short-term Load Forecasting Model for Microgrid Based on HSA-SVM

Short-term load forecasting for microgrid is the basis of the research on scheduling techniques of microgrid. Accurate load forecasting for microgrid will provide the necessary basis for cooperative optimization scheduling. Short-term loadforecasting model for microgrid based on support vector machine(SVM) is constructed in this paper. The harmony search optimization algorithm(HSA) is used to optimize the parameters of the SVM model, because it has the advantages of fast convergence speed and better optimization ability. Through the simulation and test of the actual microgrid load system, it is proved that the short-term loadforecasting model for microgrid based on HSA-SVM can effectively improve the prediction accuracy

Cold adaptation in drylands: transcriptomic insights into cold-stressed Nostoc flagelliforme and characterization of a hypothetical gene with cold and nitrogen stress tolerance

Environmental stressors, especially low temperature, are very common on the earth\u27s dryland systems. Terrestrial cyanobacteria have evolved with cold adaptability in addition to extreme dryness and high irradiation resistance. The dryland soil surface-dwelling species, Nostoc flagelliforme, serves as a potential model organism to gain insights into cyanobacterial cold adaptation. In this study, we performed transcriptomic analysis of N. flagelliforme samples in response to low temperature. The results revealed that the biological processes, such as terpenoid biosynthetic process, oxidoreductase activity, carbohydrate metabolism, biosynthesis of secondary metabolites, lipid and nitrogen metabolism, were significantly and dynamically changed during the cold stress. It was noteworthy that the transcription of the denitrification pathway for ammonia accumulation was enhanced, implying an importance for nitrogen utilization in stress resistance. In addition, characterization of a cold-responsive hypothetical gene csrnf1 found that it could greatly improve the cold-resistant performance of cells when it was heterologously expressed in transgenic Nostoc sp. PCC 7120. It was also found that csrnf1 transgenic strain exhibited resistance to nitrogen-deficient environmental stress. Considering that dryland cyanobacteria have to cope with low temperature on infertile soils, this study would enrich our understanding on the importance of multifunction of the genes for environmental cold adaptation in drylands

Solvothermal Synthesis and Characterization of a Series of Lanthanide Thiostannates(IV): The First Examples of Inorganic–Organic Hybrid Cationic Lanthanide Thiostannates(IV)

A series of new lanthanide thiostannates­(IV), [Y₂(dien)₄(μ-OH)₂]­Sn₂S₆ (<b>1</b>, dien = diethyl-enetriamine), (tetaH)₂[<i>Ln</i>₂(teta)₂(tren)₂(μ-Sn₂S₆)]­Sn₂S₆ [<i>Ln</i> = Eu (<b>2</b>), Sm (<b>3</b>); teta = triethylenetetramine; tren = tris­(2-aminoethyl)­amine] and [Eu₂(tepa)₂(μ-OH)₂(μ-Sn₂S₆)]­(tepa)_0.5·H₂O (<b>4</b>, tepa = tetraethylene-pentamine) were solvothermally synthesized and structurally characterized. <b>1</b> consists of a binuclear [Y₂(dien)₄(μ₂-OH)₂]⁴⁺ cation and a discrete dimeric [Sn₂S₆]^4– anion. Both <b>2</b> and <b>3</b> are isostructural and composed of [<i>Ln</i>₂(teta)₂(tren)₂(μ-Sn₂S₆)]²⁺ cations, protonated triethylenetetramines (tetaH), and discrete dimeric [Sn₂S₆]^4– anions. A Sn₂S₆^4– anion bridges two [<i>Ln</i>(teta)­(tren)]³⁺ cations via the <i>trans</i>-S_<i>t</i> (<i>t</i> = terminal) atoms to form the first examples of inorganic–organic hybrid thiostannate cations [<i>Ln</i>₂(teta)₂(tren)₂(μ-Sn₂S₆)]²⁺. <b>4</b> consists of one-dimensional (1-D) neutral chains [Eu₂(tepa)₂(μ-OH)₂(μ-Sn₂S₆)]_<i>n</i> built up from the linkage of dinuclear complex cations [Eu₂(tepa)₂(μ₂-OH)₂]⁴⁺ and bridging anions [Sn₂S₆]^4–, free tepa molecules, and lattice water molecules. The present compounds exhibit wide-band gap semiconducting properties with absorption band edges between 2.40 and 2.91 eV

Solvothermal Synthesis and Characterization of a Series of Lanthanide Thiostannates(IV): The First Examples of Inorganic–Organic Hybrid Cationic Lanthanide Thiostannates(IV)

A series of new lanthanide thiostannates­(IV), [Y₂(dien)₄(μ-OH)₂]­Sn₂S₆ (<b>1</b>, dien = diethyl-enetriamine), (tetaH)₂[<i>Ln</i>₂(teta)₂(tren)₂(μ-Sn₂S₆)]­Sn₂S₆ [<i>Ln</i> = Eu (<b>2</b>), Sm (<b>3</b>); teta = triethylenetetramine; tren = tris­(2-aminoethyl)­amine] and [Eu₂(tepa)₂(μ-OH)₂(μ-Sn₂S₆)]­(tepa)_0.5·H₂O (<b>4</b>, tepa = tetraethylene-pentamine) were solvothermally synthesized and structurally characterized. <b>1</b> consists of a binuclear [Y₂(dien)₄(μ₂-OH)₂]⁴⁺ cation and a discrete dimeric [Sn₂S₆]^4– anion. Both <b>2</b> and <b>3</b> are isostructural and composed of [<i>Ln</i>₂(teta)₂(tren)₂(μ-Sn₂S₆)]²⁺ cations, protonated triethylenetetramines (tetaH), and discrete dimeric [Sn₂S₆]^4– anions. A Sn₂S₆^4– anion bridges two [<i>Ln</i>(teta)­(tren)]³⁺ cations via the <i>trans</i>-S_<i>t</i> (<i>t</i> = terminal) atoms to form the first examples of inorganic–organic hybrid thiostannate cations [<i>Ln</i>₂(teta)₂(tren)₂(μ-Sn₂S₆)]²⁺. <b>4</b> consists of one-dimensional (1-D) neutral chains [Eu₂(tepa)₂(μ-OH)₂(μ-Sn₂S₆)]_<i>n</i> built up from the linkage of dinuclear complex cations [Eu₂(tepa)₂(μ₂-OH)₂]⁴⁺ and bridging anions [Sn₂S₆]^4–, free tepa molecules, and lattice water molecules. The present compounds exhibit wide-band gap semiconducting properties with absorption band edges between 2.40 and 2.91 eV