为探求我国电力行业碳排放的演变机理及区域特点,基于LMDI(Logarithmic Mean Divisia Index)方法分析影响我国电力行业碳排放变化的7个因素,明确了各因素的贡献值、贡献率,并用象限法分析了30个省份主要影响因素的差异。结果表明:2005—...为探求我国电力行业碳排放的演变机理及区域特点,基于LMDI(Logarithmic Mean Divisia Index)方法分析影响我国电力行业碳排放变化的7个因素,明确了各因素的贡献值、贡献率,并用象限法分析了30个省份主要影响因素的差异。结果表明:2005—2016年,我国电力行业碳排放总体上显著攀升,增长率为88.02%,其中2013年为峰值;经济规模是影响电力碳排放变化最大的因素,拉动碳排放累积增长3096.05 Mt,贡献率166.02%;火电能耗强度、电力结构、用电强度是抑制电力碳排放增长的主要因素,累积贡献率分别为-31.82%、-25.11%、-13.12%;主要影响因素的区域差异较大,国家减排策略要根据各省特点差异化落实,贵州、云南等省应注意调控经济增速,控制其限制开发区域、禁止开发区域的GDP增速,内蒙古、黑龙江等省要着力降低火电能耗强度,并尽量降低火电比重,宁夏、新疆等省需把降低单位GDP用电量作为主攻方向。展开更多
Based on the research of Lynett and Liu, a new horizontal fully two-dimensional internal wave propagation model with rotation effect was deduced, which can be used to simulate the characteristics of internal waves in ...Based on the research of Lynett and Liu, a new horizontal fully two-dimensional internal wave propagation model with rotation effect was deduced, which can be used to simulate the characteristics of internal waves in a horizontal fully two-dimensional plane. By combining the imaging mechanism of Synthetic Aperture Radar（SAR）, a simulation procedure was fatherly acquired, which can simulate the propagation characteristics of oceanic internal waves into SAR images. In order to evaluate the validity of the proposed simulation procedure, case studies are performed in South China Sea and results from simulation procedure are analyzed in detail. A very good consistency was found between the simulation results and satellite images. The proposed simulation procedure will be a possible foundation for the quantitative interpretation of internal waves from fully two-dimensional satellite images.展开更多
Objective To explore the mechanisms involved in Staphylococcus aureus （S. aureus） invading human monocytic U937 cells. Methods S. aureus were added to U937 cells at multiplicity of infections （MOI） of 20：1 for 0...Objective To explore the mechanisms involved in Staphylococcus aureus （S. aureus） invading human monocytic U937 cells. Methods S. aureus were added to U937 cells at multiplicity of infections （MOI） of 20：1 for 0, 15, 30, 60, and 90 minutes, respectively. Cell apoptosis was analyzed with Hoechst 33258 staining and Annexin V-fluorescein isothiocyanate （FITC）/propidium iodide （PI） flow cytometry analysis. Akt and nuclear factor-κB （NF-κB） activities were detected by Western blotting. Results Infection of U937 cells with S. aureus induced rapid cell death in a time-dependent manner, and the cells displayed characteristic features of apoptosis. S. aureus-induced apoptosis was associated with a prominent downregulation of activated （phosphorylated） Akt and NF-κB. The inhibition of phosphorylated Akt by LY294002 led to the inhibition of NF-κB in a dose-dependent manner. Inhibition of Akt with LY294002 caused further increase in apoptosis of U937 cells. Conclusions S. aureus can stimulate the apoptosis of U937 ceils. S. aureus induces apoptosis of U937 cells by inhibiting Akt-regulated NF-κB.展开更多
Objective:To investigate the clinical value of a minimally-invasive treatment of communicating hydrocephalus using a percutaneous lumboperitoneal (LP) shunt.Method:The clinical and long-term follow-up data of 256 pati...Objective:To investigate the clinical value of a minimally-invasive treatment of communicating hydrocephalus using a percutaneous lumboperitoneal (LP) shunt.Method:The clinical and long-term follow-up data of 256 patients suffering from communicating hydrocephalus and undergoing percutaneous LP shunt during 1998 to 2008 were retrospectively analyzed.Results:After the follow-up,which lasted 6 months to 10 years,219 cases of communicating hydrocephalus recovered well (ventricular size returned to normal and symptoms completely disappeared),25 cases were brought under control (ventricle size reduced by 50% and symptoms partially abated),and 12 cases showed no obvious changes.Fifteen obese subjects needed modifications of the shunt due to the obstruction of the abdominal end following wrapping,and one subject underwent extubation as the subject was unable to tolerate stimulation of the cauda equina.The effectiveness of shunting was 91.40% and the probability of shunt-tube obstruction,which occurs predominantly in the abdominal end,was only 5.85%,far lower than that of ventriculoperitoneal (VP) shunt.Three subjects had a history of infection following VP shunting.Conclusion:LP shunting is minimally invasive and effective in treating communicating hydrocephalus,with fewer complications.展开更多
The effects of shear strength on aggregation flotation processes for fine spodumene(particle size less than 19μm)were investigated in this study.Sodium oleate was used as a surfactant and collector.The shear strength...The effects of shear strength on aggregation flotation processes for fine spodumene(particle size less than 19μm)were investigated in this study.Sodium oleate was used as a surfactant and collector.The shear strength was controlled by varying the agitation speed of a selfmade stirring apparatus.The aggregation process was studied by measuring the continuous transformations in the size distribution and shape of flocs.The results showed that as the shear strength increased,the distribution of fine spodumene transformed from bimodal to unimodal mode.The flocs tended to bridge more branches with a high shear strength and form globule-like flocs with very high strengths.The parameter"aggregation degree"was introduced to evaluate the aggregation process as a function of shear strength.The flotation rate of flocs formed with different shear strengths was also studied.These results demonstrated that the flotation rate was closely related to shear strength and that there was a close correlation between this and aggregation degree.These results could be used to guide the actual production of fine particles via shear aggregation flotation.展开更多
文摘为探求我国电力行业碳排放的演变机理及区域特点,基于LMDI(Logarithmic Mean Divisia Index)方法分析影响我国电力行业碳排放变化的7个因素,明确了各因素的贡献值、贡献率,并用象限法分析了30个省份主要影响因素的差异。结果表明:2005—2016年,我国电力行业碳排放总体上显著攀升,增长率为88.02%,其中2013年为峰值;经济规模是影响电力碳排放变化最大的因素,拉动碳排放累积增长3096.05 Mt,贡献率166.02%;火电能耗强度、电力结构、用电强度是抑制电力碳排放增长的主要因素,累积贡献率分别为-31.82%、-25.11%、-13.12%;主要影响因素的区域差异较大,国家减排策略要根据各省特点差异化落实,贵州、云南等省应注意调控经济增速,控制其限制开发区域、禁止开发区域的GDP增速,内蒙古、黑龙江等省要着力降低火电能耗强度,并尽量降低火电比重,宁夏、新疆等省需把降低单位GDP用电量作为主攻方向。
基金Project supported by Chinese Academy of Sciences and China National Offshore Oil Corp
文摘Based on the research of Lynett and Liu, a new horizontal fully two-dimensional internal wave propagation model with rotation effect was deduced, which can be used to simulate the characteristics of internal waves in a horizontal fully two-dimensional plane. By combining the imaging mechanism of Synthetic Aperture Radar（SAR）, a simulation procedure was fatherly acquired, which can simulate the propagation characteristics of oceanic internal waves into SAR images. In order to evaluate the validity of the proposed simulation procedure, case studies are performed in South China Sea and results from simulation procedure are analyzed in detail. A very good consistency was found between the simulation results and satellite images. The proposed simulation procedure will be a possible foundation for the quantitative interpretation of internal waves from fully two-dimensional satellite images.
基金Supported by the Doctor Research Start-up Fund of Liaoning province (20081055)a grant from the Education Department of Liaoning province (2009A737)
文摘Objective To explore the mechanisms involved in Staphylococcus aureus （S. aureus） invading human monocytic U937 cells. Methods S. aureus were added to U937 cells at multiplicity of infections （MOI） of 20：1 for 0, 15, 30, 60, and 90 minutes, respectively. Cell apoptosis was analyzed with Hoechst 33258 staining and Annexin V-fluorescein isothiocyanate （FITC）/propidium iodide （PI） flow cytometry analysis. Akt and nuclear factor-κB （NF-κB） activities were detected by Western blotting. Results Infection of U937 cells with S. aureus induced rapid cell death in a time-dependent manner, and the cells displayed characteristic features of apoptosis. S. aureus-induced apoptosis was associated with a prominent downregulation of activated （phosphorylated） Akt and NF-κB. The inhibition of phosphorylated Akt by LY294002 led to the inhibition of NF-κB in a dose-dependent manner. Inhibition of Akt with LY294002 caused further increase in apoptosis of U937 cells. Conclusions S. aureus can stimulate the apoptosis of U937 ceils. S. aureus induces apoptosis of U937 cells by inhibiting Akt-regulated NF-κB.
基金Project (Nos. 308372673 and 30801185) supported by the National Natural Science Foundation of China
文摘Objective:To investigate the clinical value of a minimally-invasive treatment of communicating hydrocephalus using a percutaneous lumboperitoneal (LP) shunt.Method:The clinical and long-term follow-up data of 256 patients suffering from communicating hydrocephalus and undergoing percutaneous LP shunt during 1998 to 2008 were retrospectively analyzed.Results:After the follow-up,which lasted 6 months to 10 years,219 cases of communicating hydrocephalus recovered well (ventricular size returned to normal and symptoms completely disappeared),25 cases were brought under control (ventricle size reduced by 50% and symptoms partially abated),and 12 cases showed no obvious changes.Fifteen obese subjects needed modifications of the shunt due to the obstruction of the abdominal end following wrapping,and one subject underwent extubation as the subject was unable to tolerate stimulation of the cauda equina.The effectiveness of shunting was 91.40% and the probability of shunt-tube obstruction,which occurs predominantly in the abdominal end,was only 5.85%,far lower than that of ventriculoperitoneal (VP) shunt.Three subjects had a history of infection following VP shunting.Conclusion:LP shunting is minimally invasive and effective in treating communicating hydrocephalus,with fewer complications.
基金financially supported by the National Natural Science Foundation of China(No.51574240)the Natural Science Foundation of Jiangxi Province,China(Nos.20181BBG70050 and 20171BBG70044).
文摘The effects of shear strength on aggregation flotation processes for fine spodumene(particle size less than 19μm)were investigated in this study.Sodium oleate was used as a surfactant and collector.The shear strength was controlled by varying the agitation speed of a selfmade stirring apparatus.The aggregation process was studied by measuring the continuous transformations in the size distribution and shape of flocs.The results showed that as the shear strength increased,the distribution of fine spodumene transformed from bimodal to unimodal mode.The flocs tended to bridge more branches with a high shear strength and form globule-like flocs with very high strengths.The parameter"aggregation degree"was introduced to evaluate the aggregation process as a function of shear strength.The flotation rate of flocs formed with different shear strengths was also studied.These results demonstrated that the flotation rate was closely related to shear strength and that there was a close correlation between this and aggregation degree.These results could be used to guide the actual production of fine particles via shear aggregation flotation.
