The production and consumption of natural gas in China has been developing rapidly in recent years.It is expected that the annual growth rate of the demand for natural gas will reach 12% in the next 15 years,and the g...The production and consumption of natural gas in China has been developing rapidly in recent years.It is expected that the annual growth rate of the demand for natural gas will reach 12% in the next 15 years,and the gas consumption in the primary energy will increase from 0.3% to 10% or more by 2020.However,since the supply of natural gas cannot satisfy the requirements,China has begun to build liquefied natural gas(LNG)terminals in the coastal regions such as Guangdong and Fujian,and solve this problem by importing LNG from foreign countries.LNG needs to be transported by LNG ships from abroad.With the rapid growth of global gas production,the volume of LNG trade also increases,and the interregional production increased from 0.3% in 1970 to 26.2% in 2004.So,we need LNG ships more than before.This article puts forward the distribution of LNG ships and the speculation of the future of LNG transportation based on the studies on foreign LNG production,the LNG trade,the building of LNG ships,the LNG transportation,the chain model of LNG distribution,etc.展开更多
目的探讨左心疾病所致肺动脉高压(pulmonary hypertension caused with left heart disease,PH-LHD)患者血清白细胞介素-6(interleukin-6,IL-6)水平及其预测价值。方法选取2019年10月至2021年3月于聊城市人民医院或聊城市第三人民医院...目的探讨左心疾病所致肺动脉高压(pulmonary hypertension caused with left heart disease,PH-LHD)患者血清白细胞介素-6(interleukin-6,IL-6)水平及其预测价值。方法选取2019年10月至2021年3月于聊城市人民医院或聊城市第三人民医院住院被诊断为左心衰竭的225例患者作为研究对象,其中PH-LHD患者157例。采用多元线性回归分析各因素与PH-LHD的相关性。采用多因素Cox比例风险回归模型分析出现PH-LHD的危险因素。采用受试者工作特征(receiver operating characteristic,ROC)曲线分析IL-6对PH-LHD的预测价值。结果PH-LHD患者占69.78%(157/225),根据跟着指南走—心力衰竭(get with the guidelines-heart failure,GWTG-HF)模型评分将PH-LHD患者分为低危组60例(GWTG-HF评分≤35分)、中危组77例(GWTG-HF评分>35~41分)与高危组20例(GWTG-HF评分>41分)。低危、中危和高危组IL-6水平依次升高,分别为17.71(14.51,25.01)、26.92(16.76,43.57)、60.30(34.00,105.43)pg/mL,差异有统计学意义(P<0.05)。线性回归分析结果显示,血清IL-6与PH-LHD患者GWTG-HF评分存在显著相关性(t=7.985,P<0.01)。Cox回归分析结果显示,红细胞分布宽度(red blood cell distribution width,RDW)、血尿素氮、N端脑钠肽前体(N-terminal pro-B-type natriuretic peptide,NT-proBNP)、IL-6是PH-LHD的独立预测因素(P<0.05),ROC曲线分析进一步显示了血清IL-6对PH-LHD独立预测的优越性[曲线下面积(area under curve,AUC)为0.916,95%CI 0.910~0.972,临界值为13.43 pg/mL,灵敏度为92.81%,特异度为85.32%]。结论血清IL-6可作为PH-LHD患者疾病风险评估的依据,对PH-LHD具有较好的独立预测价值。展开更多
基金Under the auspices of the National Natural Science Foundation of China(No.40671052)
文摘The production and consumption of natural gas in China has been developing rapidly in recent years.It is expected that the annual growth rate of the demand for natural gas will reach 12% in the next 15 years,and the gas consumption in the primary energy will increase from 0.3% to 10% or more by 2020.However,since the supply of natural gas cannot satisfy the requirements,China has begun to build liquefied natural gas(LNG)terminals in the coastal regions such as Guangdong and Fujian,and solve this problem by importing LNG from foreign countries.LNG needs to be transported by LNG ships from abroad.With the rapid growth of global gas production,the volume of LNG trade also increases,and the interregional production increased from 0.3% in 1970 to 26.2% in 2004.So,we need LNG ships more than before.This article puts forward the distribution of LNG ships and the speculation of the future of LNG transportation based on the studies on foreign LNG production,the LNG trade,the building of LNG ships,the LNG transportation,the chain model of LNG distribution,etc.
文摘目的探讨左心疾病所致肺动脉高压(pulmonary hypertension caused with left heart disease,PH-LHD)患者血清白细胞介素-6(interleukin-6,IL-6)水平及其预测价值。方法选取2019年10月至2021年3月于聊城市人民医院或聊城市第三人民医院住院被诊断为左心衰竭的225例患者作为研究对象,其中PH-LHD患者157例。采用多元线性回归分析各因素与PH-LHD的相关性。采用多因素Cox比例风险回归模型分析出现PH-LHD的危险因素。采用受试者工作特征(receiver operating characteristic,ROC)曲线分析IL-6对PH-LHD的预测价值。结果PH-LHD患者占69.78%(157/225),根据跟着指南走—心力衰竭(get with the guidelines-heart failure,GWTG-HF)模型评分将PH-LHD患者分为低危组60例(GWTG-HF评分≤35分)、中危组77例(GWTG-HF评分>35~41分)与高危组20例(GWTG-HF评分>41分)。低危、中危和高危组IL-6水平依次升高,分别为17.71(14.51,25.01)、26.92(16.76,43.57)、60.30(34.00,105.43)pg/mL,差异有统计学意义(P<0.05)。线性回归分析结果显示,血清IL-6与PH-LHD患者GWTG-HF评分存在显著相关性(t=7.985,P<0.01)。Cox回归分析结果显示,红细胞分布宽度(red blood cell distribution width,RDW)、血尿素氮、N端脑钠肽前体(N-terminal pro-B-type natriuretic peptide,NT-proBNP)、IL-6是PH-LHD的独立预测因素(P<0.05),ROC曲线分析进一步显示了血清IL-6对PH-LHD独立预测的优越性[曲线下面积(area under curve,AUC)为0.916,95%CI 0.910~0.972,临界值为13.43 pg/mL,灵敏度为92.81%,特异度为85.32%]。结论血清IL-6可作为PH-LHD患者疾病风险评估的依据,对PH-LHD具有较好的独立预测价值。
