驶向未来的燃料电池汽车

燃料电池作为一种高效、清洁、无污染的能量转换装置，并不是什么新鲜的东西。早在160年前人类发明普通电池时，燃料电池就已经存在了。但是，以燃料电池为动力的燃料电池汽车，则是近几年汽车工业的新发展。燃料电池汽车的开发背景燃料电池汽车的开发，一方面是迫于环境污染的压力，另一方面得益于燃料电池技术的迅速发展。化石燃料的日渐短缺和紧张在客观上也促进了燃料电池技术在汽车上的应用。随着社会的发展和时代的进步，汽车的数量在急剧增多。普通汽车由于是以汽油、柴油为燃料，尾气中含有大量的硫氧化物、氮氧化物和一氧化碳等有…     

解决新型化学电源常见问题的思路分析

高考中的新型电池有"氢镍电池"、"高铁电池"、"锌—锰碱性电池"、我国首创的"海洋电池"、"燃料电池"(如新型细菌燃料电池、氢氧燃料电池、丁烷燃料电池、甲醇质子交换膜燃料电池、CO燃料电池)、"锂离子电池"、"银     

高考中新型电池六个难点的突破

高考中的新型电池,大致有氢镍电池、高铁电池、锌-锰碱性电池、我国的海洋电池、燃料电池(如新型细菌燃料电池、氢氧燃料电池、丁烷燃料电池、甲醇质子交换膜燃料电池、CO燃料电池等)、锂离子电池、银锌电池、纽扣电池等.这些电池一般具有高能环保、经久耐用、电压稳定、比能量(单位质量释放的能量)高等特点.     

高考中的新型电池与六个难点的突破

高考中的新型电池,大致有"氢镍电池"、"高铁电池"、"锌-锰碱性电池"、我国首创的"海洋电池"、燃料电池(如新型细菌燃料电池、氢氧燃料电池、丁烷氧燃料电池、甲醇质子交换膜燃料电池、一氧化碳燃料电池)、"锂离子电池"、银锌电池、纽扣电池等。这些电池一般具有高能环保、经久耐用、电压稳定、比能量(单位质量释放的能量)高等特点。     

美研制出液态甲醇燃料电池

据新华网洛杉矾5月27日电（记者高原）美国航天局下属喷气推进实验室日前宣布,该机构与南加州大学合作,研制出一种利用液态甲醇产生电能的电池,这项技术将为进一步开发和推广清洁能源开辟新途径。喷气推进实验室26日发布的新闻公报说,与其他燃料电池相比,这种“直接甲醇燃料电池”在发电时不需要添加任何燃料,也不排放任何污染物,其发电副产品为水和二氧化碳,如此生成的电能相对更清洁。此外,“直接甲醇燃料电池”还具有设计简单和能量密度高等特点。公报说,目前使用的一些燃料电池主要以氢为能源,但氢难以储存和运输,而“直接甲醇燃料电池”克服了这一缺点。     

燃料电池测试系统的组成和关键技术

我国目前对燃料电池的研究正在蓬勃兴起，已经取得了长足的进步。然而，对于燃料电池测试方面的技术却没有得到同步发展，这必将制约今后我国的燃料电池工业的发展。以PEM燃料电池为例，论述了燃料电池测试系统的组成原理，以及开发燃料电池测试系统中的关键技术。     

光催化型微生物燃料电池研究进展

光催化型微生物燃料电池是一种可同步实现污染物去除和产电两种效能的新型水污染处理技术。研究综述了国内外光催化型微生物燃料电池现状,重点介绍光催化型微生物燃料电池的机理、构型、电极材料、产电微生物和在污染物去除方面的应用,并对其未来发展进行展望。     

备受青睐的燃料电池

本文介绍了燃料电池的工作原理,并与常规电池、热机等进行比较。扼要说明燃料电池的发展历史、燃料电池的类型,以及应用领域和我国燃料电池技术的发展。     

新型生物燃料电池

电池是一辆人“双刃剑”,它一方面给我们带来了光明和能量,另一方面却在使用过程中带来了严重的环境问题：一粒扭扣电池可使600吨水受到污染,相当于一俱一生的饮水量,严峻的现实迫使人们寻找电池发展的新出路各,生物燃料电池的问世让我们看到了曙光,那么,什么是生物燃料电池？和传统化学燃料电池相比,它有哪些优点呢？     

德国即将推出太阳能手机电池

德国一所理工学院正在研究开发可适用于手机、掌上装置的新款太阳能电池，将可免去充电或换电池的麻烦。 据此间媒体报道，这种新款太阳能电池，其实是小型燃料电池，内配超强力太阳能感应器，可为燃料电池充电。这种电池的优点是，在只有夏季太阳光度的3％光源下，如普通办公场所等都可保持手机等器材正常操作，甚至只有太阳光度1％的电力时也能保持稳定，手机正常使用。 日本卡西欧、德国西门子公司等制造厂商已经开始制造应用这种电池的原型机种。     

卡思卡特城堡

It is worthy of noting that, whilst Crookston Castle witnessed the earlier and happier portion of Mary's variegated life,     

不同的吃喝玩乐

一、吃和喝吃苹果 eat an apple, 吃药 take medicine,吃糖 have some sweets,吃饭 have one's meals,吃馆子 dine out,吃惊 be surprised/     

漏洞百出的教育

Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help?     

只要努力,不要后悔

There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love.     

浅谈移民问题

Migration occurs behind a variety of reasons and has a great effect on the whole world. People may migrate in order to improve their economic situation, or in order to escape civil strife, persecution, and environmental disasters. The impact of migration is complex, bringing both benefits anddisadvantages. This paper briefly talks about the causes of migration, the allocation of benefits, and the ways in which individual countries and the international community deal with this important subject.     

Sister Carrie, an Adherent of Desires

Sister Carrie is one of the most controversial characters in American literature.Thought as a "fallen woman" firstly,she was defined as a "new woman" by some critics later. However, by digging into the motivaton behind the whole process of Carrie's "success", the relationship between Carrie and her creator (the author), the social conditions of then American, it can be found that Carrie has never been free-standing on her thought and she has never found her real-sdf even after becoming a famous actress. In a society dominated by mass consumerism Carrie is only an adherent of her own desires. She also is a representative of all those country girls flooded into cities, a symbol and a sacrifice of the urbanization of America in a time countryside was overcome by cities.     

Improvement of one-cycle controller by use of proportional integral differential controller

1.IntroductionOne-cyclecontrolmethod,whichwasproposedaboutonedecadeago[1],hasbecomeanattractivemethodinspecialfieldssuchaspowerfactorcorrection[2-6],switchingamplifiers[7,8],etc.Themainideaofthiscontrollerisbasedonintegrationofdiodevoltageinone-cycleandforcesittobeexactlyequaltothereferencevalue.Themainadvantageofthiscontrollerisitsrealtimeabilitytorejectthevariationofinputvoltage[1].Despitethisgreatability,ithasnogoodperformancesinrejectingofloaddisturbanceandfollowingreferencecommands.Espec…     

库克斯顿城堡

城堡, 是欧洲典型的建筑之一, 每个城堡都有一个美丽的传说或是一段历史。从本期开始, 我们将推出“城堡之旅”, 带各位读者去浏览、观赏欧洲各地的城堡, 开始一段文化与历史的旅途!     

The Reader Response Approach to Teaching of English Literature

During interview with English majors, it was found that a majority of students expressed disappointment with their experience of English literature classes. Students' dislike of learning English literature appears to be the major problem of teaching English literature in China. Reader response approach is a good way to solve this problem. In this paper, I explain the rationale behind the reader response approach, such as its origin, definition, features, assumptions, and strategies. Then I illustrate how reader response approach works as a teaching strategy by presenting several teaching models. At last I evaluate its usefuiness for teachers and present the advantages of reader response approach in Chinese context.