Meta regression analysis method was applied to study 23 papers about the effect of Chinese labor reallocation on the economic growth. The results showed that both the method of the World Bank (1996) or M.Syrquin(1986)...Meta regression analysis method was applied to study 23 papers about the effect of Chinese labor reallocation on the economic growth. The results showed that both the method of the World Bank (1996) or M.Syrquin(1986) had little impact on the results, while the calculation of the stock of physical capital had a positive impact on the results. The result by using panel data study was bigger than results obtained in the time series data. The time span had little influences on the results. Therefore, it was necessary to measure the exact stock of physical capital in China, so as to evaluate the Chinese labor reallocation展开更多
Non-alcoholic fatty liver disease(NAFLD)is a clinical syndrome associated with steatosis and excessive deposition in the liver,while safe,green and efficient curative therapy is still lacking.Current researches have s...Non-alcoholic fatty liver disease(NAFLD)is a clinical syndrome associated with steatosis and excessive deposition in the liver,while safe,green and efficient curative therapy is still lacking.Current researches have shown that plant polyphenols possess superior lipid-lowering and liver protective activities.Pu'er raw tea,a widely consumed tea with increasing fans,has been reported with various healthcare functions,such as blood lipids-lowering,weight loss,anti-microbes and anti-cancer.Therefore,in this study,polyphenols were extracted,purified and identified from Pu'er raw tea.The beneficial effects of Pu'er raw tea extract(PTE)on lipidoses in both LO2 cells and Caenorhabditis elegans were investigated.In vitro,PTE manifested beneficial effects in protecting cells from oxidative stress,alleviating lipid accumulation and expression of metabolic transcription factors such as Pparα,CD36,Plin2,Scd1,and activating the SIRT1-FOXO pathway to inhibit the expression of SREBP-1c and FAS.In vivo,PTE regulated the abnormal athletic ability of C.elegans and inhibited lipidosis in the whole body induced by oleic acid(OA).Therefore,PTE has exhibited superior bioactivity in alleviating lipid deposition both in vivo and in vitro,and could be regarded as a potential therapeutic strategy for NAFLD in the future.展开更多
12-pulse rectifier is extensively used in high power rectification, and the delta-connected autotransformer and wye-connected autotransformer are its two most popular phase-shift transformers. This paper compares the ...12-pulse rectifier is extensively used in high power rectification, and the delta-connected autotransformer and wye-connected autotransformer are its two most popular phase-shift transformers. This paper compares the 12-pulse rectifiers using the two transformers via calculating the input line current, load voltage, kVA ratings of the two autotransformer, kVA ratings of the auxiliary magnetic devices. From the viewpoint of power quality of AC mains and DC side, the two 12-pulse rectifiers are the same. The kVA rating of the IPR in the two 12-pulse rectifiers are equal, and the kVA rating of the ZSBT in the two 12-pulse rectifier are also equal to each other, under the same load power. However, the kVA of the deltaconnected autotransformer is less than that of the wyeconnected autotransformer under the same load power.Some experimental results are shown to validate the correctness of the theoretical analysis.展开更多
基金Supported by Sichuan Rural Development Center(CR1226):Combined Subjects of Social and Scientific Research of Sichuan Agricultural University
文摘Meta regression analysis method was applied to study 23 papers about the effect of Chinese labor reallocation on the economic growth. The results showed that both the method of the World Bank (1996) or M.Syrquin(1986) had little impact on the results, while the calculation of the stock of physical capital had a positive impact on the results. The result by using panel data study was bigger than results obtained in the time series data. The time span had little influences on the results. Therefore, it was necessary to measure the exact stock of physical capital in China, so as to evaluate the Chinese labor reallocation
基金supported by the program of China Poverty Alleviation through Education 2021.
文摘Non-alcoholic fatty liver disease(NAFLD)is a clinical syndrome associated with steatosis and excessive deposition in the liver,while safe,green and efficient curative therapy is still lacking.Current researches have shown that plant polyphenols possess superior lipid-lowering and liver protective activities.Pu'er raw tea,a widely consumed tea with increasing fans,has been reported with various healthcare functions,such as blood lipids-lowering,weight loss,anti-microbes and anti-cancer.Therefore,in this study,polyphenols were extracted,purified and identified from Pu'er raw tea.The beneficial effects of Pu'er raw tea extract(PTE)on lipidoses in both LO2 cells and Caenorhabditis elegans were investigated.In vitro,PTE manifested beneficial effects in protecting cells from oxidative stress,alleviating lipid accumulation and expression of metabolic transcription factors such as Pparα,CD36,Plin2,Scd1,and activating the SIRT1-FOXO pathway to inhibit the expression of SREBP-1c and FAS.In vivo,PTE regulated the abnormal athletic ability of C.elegans and inhibited lipidosis in the whole body induced by oleic acid(OA).Therefore,PTE has exhibited superior bioactivity in alleviating lipid deposition both in vivo and in vitro,and could be regarded as a potential therapeutic strategy for NAFLD in the future.
基金supported by National Natural Science Foundation of China(No.51307034)in part by the Natural Science Foundation of Shandong Province(No.ZR2013EEQ002)
文摘12-pulse rectifier is extensively used in high power rectification, and the delta-connected autotransformer and wye-connected autotransformer are its two most popular phase-shift transformers. This paper compares the 12-pulse rectifiers using the two transformers via calculating the input line current, load voltage, kVA ratings of the two autotransformer, kVA ratings of the auxiliary magnetic devices. From the viewpoint of power quality of AC mains and DC side, the two 12-pulse rectifiers are the same. The kVA rating of the IPR in the two 12-pulse rectifiers are equal, and the kVA rating of the ZSBT in the two 12-pulse rectifier are also equal to each other, under the same load power. However, the kVA of the deltaconnected autotransformer is less than that of the wyeconnected autotransformer under the same load power.Some experimental results are shown to validate the correctness of the theoretical analysis.
