2613 篇
1075 篇
264385 篇
3265 篇
6305 篇
2228 篇
2769 篇
537 篇
29522 篇
9423 篇
3131 篇
747 篇
2294 篇
1314 篇
449 篇
752 篇
1387 篇
2597 篇
2736 篇
3996 篇
[电力、热力、燃气及水生产和供应业] [2020-05-17]
面对“能源转型”这个跨越三个世纪的话题,站在新能源的角度容易强调可再生能源的快速发展,站在石化行业以及煤炭行业角度又容易强调化石能源难以撼动的主体地位,都难免失之片面。
[电力、热力、燃气及水生产和供应业] [2020-05-16]
4 月锂电池板块指数跑输沪深 300 指数。2020 年 4 月,锂电池指数上 涨 1.44%,新能源汽车指数上涨 2.17%,而同期沪深 300 指数上涨 6.46%,锂电池指数跑输沪深 300 指数。
[电力、热力、燃气及水生产和供应业] [2020-05-16]
Energy harvesting, also known as power harvesting or energy scavenging, is defined as the process by which energy is derived from external sources. Ambient energy, the source of energy for energy harvesting systems, is present as ambient background and freely available. Different sources of ambient energy include light energy, thermal energy, radio frequency energy, kinetic energy, chemical/biological energy, atmospheric energy, and hydro energy. Among these, solar, thermal, and vibrational energy are the forms of energy that are the most frequently used by energy harvesting systems. Energy harvesting systems typically convert the ambient energy into electrical energy, which is then used to power up various devices, such as consumer electronics, implantable biosensors, wireless sensor nodes, military equipment, etc. Energy harvesting systems are primarily used in low-power electrical utilities, such as sensors, watches, and home appliances. These systems provide an efficient alternative to the use of conventional power sources, like batteries. The use of such energy sources have been particularly advantageous, as the devices can be virtually operated to an infinite amount of time without any adverse affects on the environment. There is high usage of batteries, globally, which is leading to wastage of resources and potentially harmful outcomes for the environment.
[电力、热力、燃气及水生产和供应业] [2020-05-15]
“科改示范行动”是继国企改革“双百行动”、“区域性综改试验”后的又一国企改革专项工程,共选取了 200 余户改革创新紧迫性较强的国有科技型企业,在切实加强党对国有企业的全面领导、坚决防止国有资产流失的前提下,按照高质量发展要求,进一步推动深化市场化改革,重点在完善公司治理、市场化选人用人、强化激励约束等方面探索创新、取得突破,打造一批国有科技型企业改革样板和自主创新尖兵,在此基础上复制推广成功经验。
[电力、热力、燃气及水生产和供应业] [2020-05-13]
[电力、热力、燃气及水生产和供应业] [2020-05-11]
[电力、热力、燃气及水生产和供应业,采矿业] [2020-05-11]
[电力、热力、燃气及水生产和供应业] [2020-05-10]
电力设备新能源行业 2019 年业绩亮眼,2020Q1 疫情之下底部已现:2019 全年,电新板块 132 家上市公司整体实现营收 7690 亿元,同比增长 20.11%, 增幅较往年表现亮眼,但 2020Q1 受疫情影响,营收同比下降 0.18%;2019 年 实现归母净利润 587 亿元,同比上升 26.32,而 2020Q1 在疫情之下同比增长 1.51%。行业内公司毛利率和净利率水平在 2019 年总体维持稳定,但管理费 用率和财务费用率有所上升,2019 年公司现金流水平大幅度提升,同比增长 88%,但 2020Q1 受疫情影响,现金流承压。
[电力、热力、燃气及水生产和供应业] [2020-05-10]
特斯拉一季度实现营收59.85亿美元,同比增长32%,汽车销售毛利率25.5%, 环比上升 3pct。这是特斯拉第一次连续三个季度盈利,同时也是第一次在 Q1 盈利。过去三个季度,特斯拉分别盈利 1.4 亿美元、1.1 亿美元、1600 万 美元。特斯拉在中国的总交付量为 18586 辆,占其全球总销量的 21%。继国 补政策出台后,地方连续出台相应新能源政策,深圳新能源牌照条件放宽, 上海新能源补贴加码,预计未来国内新能源汽车景气将持续提升。
[电力、热力、燃气及水生产和供应业] [2020-05-10]
海外需求旺盛,疫情影响产业链价格。由于竞价项目启动较晚,国内 2019 年光伏新增并网容量 30.11GW,同比降低 31.6%,但 2018 年 531 之后光伏产业链价格下滑 40-50%,海外需求得到刺激,2019 中国光伏 组件出口 63.5GW,同增 61.6%。由于新冠疫情影响,1Q20 需求出现下 滑,由此致密料/单晶硅片/单晶电池/单晶组件 2020 年以来价格分别降 低 15%/21%/20%/7%。