Since it's made up of over 7,000 islands,the Philippines is not a nation with a well‑developed railway transportation.That means coach buses are going to be your best bet for getting city‑to‑city.There is a small ...Since it's made up of over 7,000 islands,the Philippines is not a nation with a well‑developed railway transportation.That means coach buses are going to be your best bet for getting city‑to‑city.There is a small light rail system called the Light Rail Transit(LRT)in the Metro Manila area,but it's desperately inefficient.展开更多
氢燃料电池车在碳排放方面具有独特优势,研究氢燃料电池车的碳减排贡献,对于实现“碳达峰”、“碳中和”目标有着很大的意义.为了评价氢燃料电池车的碳排放情况,本文以氢燃料电池车中比较典型的氢燃料电池大客车为研究对象,针对其生产...氢燃料电池车在碳排放方面具有独特优势,研究氢燃料电池车的碳减排贡献,对于实现“碳达峰”、“碳中和”目标有着很大的意义.为了评价氢燃料电池车的碳排放情况,本文以氢燃料电池车中比较典型的氢燃料电池大客车为研究对象,针对其生产、使用以及回收阶段的排放的CO_(2)进行了全生命周期评价,分析其在全生命周期各环节的碳足迹.并且研究轻量化材料在使用阶段中对碳足迹的影响,着重研究组成膜电极的主要成分铂(Pt)在回收阶段的碳排放情况.结果表明,在生产阶段,高压储氢罐以及燃料电池堆的碳排放比较严重,生产整车的碳排放达到84550.90 kgCO_(2)eq;在使用阶段,使用轻量化材料能够使碳排放减少大约30%;在回收阶段,除了回收作为客车储能电池的磷酸铁锂(Lithium Iron Phosphate,LFP)电池之外,车身、底盘、平衡装置以及Pt的回收都对碳减排有贡献,回收阶段最终可实现12308 kgCO_(2)eq的碳减排.展开更多
AUTONOMOUS buses gliding through the streets,satellites with flexible solar wings whizzing through space,smart electric vehicle factories running at full speed...In recent years,Beijing has seen the emergence of a lar...AUTONOMOUS buses gliding through the streets,satellites with flexible solar wings whizzing through space,smart electric vehicle factories running at full speed...In recent years,Beijing has seen the emergence of a large number of cutting-edge technology companies,confirming the city’s role as a melting pot of scientific innovation in China.展开更多
Designed and built by eight Dutch engineers,the worlds longest bicycle is 55.16 meters,roughly the same length as four double-decker buses.39-year-old Ivan Schalk had been thinking about building the world's longe...Designed and built by eight Dutch engineers,the worlds longest bicycle is 55.16 meters,roughly the same length as four double-decker buses.39-year-old Ivan Schalk had been thinking about building the world's longest bicycle since reading about it in The Guinness Book of Records when he was a child,but he only started this project in 2018,as a way to fill up his free time.展开更多
With a boom in its science and technology sector,Beijing is establishing itself as a hotbed of innovation Autonomous buses gliding through the streets,satellites with flexible solar wings whizzing through space,smart ...With a boom in its science and technology sector,Beijing is establishing itself as a hotbed of innovation Autonomous buses gliding through the streets,satellites with flexible solar wings whizzing through space,smart electric vehicle factories running at full speed…In recent years,Beijing has seen the emergence of a large number of cutting-edge technology companies,confirming the city’s role as a melting pot of scientific innovation in China.展开更多
文摘Since it's made up of over 7,000 islands,the Philippines is not a nation with a well‑developed railway transportation.That means coach buses are going to be your best bet for getting city‑to‑city.There is a small light rail system called the Light Rail Transit(LRT)in the Metro Manila area,but it's desperately inefficient.
文摘氢燃料电池车在碳排放方面具有独特优势,研究氢燃料电池车的碳减排贡献,对于实现“碳达峰”、“碳中和”目标有着很大的意义.为了评价氢燃料电池车的碳排放情况,本文以氢燃料电池车中比较典型的氢燃料电池大客车为研究对象,针对其生产、使用以及回收阶段的排放的CO_(2)进行了全生命周期评价,分析其在全生命周期各环节的碳足迹.并且研究轻量化材料在使用阶段中对碳足迹的影响,着重研究组成膜电极的主要成分铂(Pt)在回收阶段的碳排放情况.结果表明,在生产阶段,高压储氢罐以及燃料电池堆的碳排放比较严重,生产整车的碳排放达到84550.90 kgCO_(2)eq;在使用阶段,使用轻量化材料能够使碳排放减少大约30%;在回收阶段,除了回收作为客车储能电池的磷酸铁锂(Lithium Iron Phosphate,LFP)电池之外,车身、底盘、平衡装置以及Pt的回收都对碳减排有贡献,回收阶段最终可实现12308 kgCO_(2)eq的碳减排.
文摘AUTONOMOUS buses gliding through the streets,satellites with flexible solar wings whizzing through space,smart electric vehicle factories running at full speed...In recent years,Beijing has seen the emergence of a large number of cutting-edge technology companies,confirming the city’s role as a melting pot of scientific innovation in China.
文摘Designed and built by eight Dutch engineers,the worlds longest bicycle is 55.16 meters,roughly the same length as four double-decker buses.39-year-old Ivan Schalk had been thinking about building the world's longest bicycle since reading about it in The Guinness Book of Records when he was a child,but he only started this project in 2018,as a way to fill up his free time.
文摘With a boom in its science and technology sector,Beijing is establishing itself as a hotbed of innovation Autonomous buses gliding through the streets,satellites with flexible solar wings whizzing through space,smart electric vehicle factories running at full speed…In recent years,Beijing has seen the emergence of a large number of cutting-edge technology companies,confirming the city’s role as a melting pot of scientific innovation in China.
