Electrochemical characteristics of Mg2Ni-type alloys prepared by mechanical alloying

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的主体，要下功夫写好，关键是要写得既具体，又不繁琐；既概括，又不抽象；既生动形象，又很实在。总之，就是要写得很有说服力，让人一看便可得出够得上先进的结论。比如，写一位端正党风先进人物的事迹材料，就应当着重写这位同志在发扬党的优良传统和作风方面都有哪些突出的先进事迹，在同不正之风作斗争中有哪些突出的表现。又如，写一位搞改革的先进人物的事迹材料，就应当着力写这位同志是从哪些方面进行改革的，已经取得了哪些突出的成果，特别是改革前后的．经济效益或社会效益都有了哪些明显的变化。在写这些先进事迹时，无论是先进个人还是先进集体的，都应选取那些具有代表性的具体事实来说明。必要时还可运用一些数字，以增强先进事迹材料的说服力。为了使先进事迹的内容眉目清晰、更加条理化，在文字表述上还可分成若干自然段来写，特别是对那些涉及较多方面的先进事迹材料，采取这种写法尤为必要。如果将各方面内容材料都混在一起，是不易写明的。在分段写时，最好在每段之前根据内容标出小标题，或以明确的观点加以概括，使标题或观点与内容浑然一体。最后，是先进事迹材料的署名。一般说，整理先进个人和先进集体的材料，都是以本级组织或上级组织的名义；是代表组织意见的。因此，材料整理完后，应经有关领导同志审定，以相应一级组织正式署名上报。这类材料不宜以个人名义署名。写作典型经验材料-般包括以下几部分： (1)标题。有多种写法，通常是把典型经验高度集中地概括出来，一

关于时间管理的英语作文 manage time

How to manage time Time treats everyone fairly that we all have 24 hours per day. Some of us are capable to make good use of time while some find it hard to do so. Knowing how to manage them is essential in our life. Take myself as an example. When I was still a senior high student, I was fully occupied with my studies. Therefore, I hardly had spare time to have fun or develop my hobbies. But things were changed after I entered university. I got more free time than ever before. But ironically, I found it difficult to adjust this kind of brand-new school life and there was no such thing called time management on my mind. It was not until the second year that I realized I had wasted my whole year doing nothing. I could have taken up a Spanish course. I could have read ten books about the stories of successful people. I could have applied for a part-time job to earn some working experiences. B ut I didn’t spend my time on any of them. I felt guilty whenever I looked back to the moments that I just sat around doing nothing. It’s said that better late than never. At least I had the consciousness that I should stop wasting my time. Making up my mind is the first step for me to learn to manage my time. Next, I wrote a timetable, setting some targets that I had to finish each day. For instance, on Monday, I must read two pieces of news and review all the lessons that I have learnt on that day. By the way, the daily plan that I made was flexible. If there’s something unexpected that I had to finish first, I would reduce the time for resting or delay my target to the next day. Also, I would try to achieve those targets ahead of time that I planed so that I could reserve some more time to relax or do something out of my plan. At the beginning, it’s kind of difficult to s tick to the plan. But as time went by, having a plan for time in advance became a part of my life. At the same time, I gradually became a well-organized person. Now I’ve grasped the time management skill and I’m able to use my time efficiently.

Electrochemical supercapacitors for energy storage and delivery

Editorial Electrochemical supercapacitors for energy storage and delivery:Advanced materials,technologies and applications q 1.Introduction In the effort to achieve a clean and sustainable world,energy storage and delivery have become one of today’s most important topics in globe research and development.In this regard,electro-chemical energy technologies such as batteries,fuel cells,and elec-trochemical supercapacitors have been recognized as the most important portion of the various energy storage and delivery tech-nologies.Among these technologies,supercapacitors,emerging as one of the most important energy storage and delivery devices for the 21st century,are particularly the most reliable and safe devices with extremely high power density and cycling stability in many applications including portable electronics,automobile vehicles,stationary power stations and energy storage devices,backup power supplies,etc.However,its challenges of low energy density as well as this low energy density induced high cost are the major drawbacks.To overcome these challenges,in recent years,there are tremendous efforts focusing on the development of new and cost-effective electrodes and electrolyte materials as well as electrode con?guration to improve the capacitance,the energy density of the next generation of supercapacitors. In order to benchmark the state of research in this area at this time,Applied Energy organized a special issue dedicated to recent research development in Supercapacitors.The articles in this spe-cial issue cover the most recent progress of supercapacitor research and development in terms of both fundamentals and applications with focuses on cutting edge research on new materi-als for system designs and practical deployment investigations.2.Background of supercapacitors Normally,the energy storage mechanism of supercapacitors is electrochemical in nature,but differs from that of batteries or fuel cells that rely on the coupling of Faradaic redox reactions.Instead,supercapacitors store and discharge energy dominantly through what is called electric double layer capacitance (EDLC).This occurs by employing two high surface area electrodes,that when charged,form a Helmholtz double layer at the interface between the con-ductive electrode materials and the electrolyte,as illustrated in Fig.1.The electrodes have opposing charges,and in this fashion energy is stored by the electrostatic charge separation.As a result of this energy storage mechanism,supercapacitors can charge and discharge in a matter of seconds while delivering immense power densities (typically in the 10–1000KW/kg).Their operational life-times are also an attractive feature,boasting in excess of 100,000charge and discharge cycles before needing replacement (ref).Owing to these advanced properties,supercapacitors have gained commercial success in certain applications that include dynamic load levelling and uninterruptable power supplies.However,due to their low energy density,large untapped markets remain,including the use of supercapacitors in electric vehicles,large scale energy storage units (grid),and small scale portable electronics.For supercapacitors to effectively penetrate these markets,further technological advances,such as those reported in this special issue are required. At the current state of research,a large body of research has been focused on increasing the energy density of supercapacitors by developing novel high surface area carbon materials,such as graphene,with unprecedented electric double layer capacitance.It is expected that the viability of supercapacitors could also be extended towards a wide range of applications if energy densities can be improved to more closely resemble those of batteries.To accomplish this,psuedocapacitors (or hybrid supercapacitors)are an emerging trend of research that includes compositing conven-tional EDLC electrodes with materials that contribute redox beha-viour during charge and discharge.These materials,with a high capacity to store energy must also be integrated into operational supercapacitor cell designs.These systems may then have their performance investigated and validated towards new,promising applications. 3.Research covered in this special issue In this special issue,13papers have been included covering the areas of electric double layer capacitance materials,psuedocapac-itor material,system design and application deployment.3.1.New high surface area EDLC materials Developing novel nano-structured electrode materials are one of the most active approaches in supercapacitors.For example,Article [1]reports the use of rice husks,a renewable resource,to prepare high surface area porous carbons that were used as EDLC https://www.360docs.net/doc/f46009237.html,/10.1016/j.apenergy.2015.05.0540306-2619/ó2015Published by Elsevier Ltd. q This paper is included in the Special Issue of Electrochemical Supercapacitors for Energy Storage and Conversion,Advanced Materials,Technologies and Applications edited by Dr.Jiujun Zhang,Dr.Lei Zhang,Dr.Radenka Maric,Dr.Zhongwei Chen,Dr.Aiping Yu and Prof.Yan.

英语演讲稿：未来的工作

英语演讲稿：未来的工作这篇《英语演讲稿范文：未来的工作》，是特地，希望对大家有所帮助！热门演讲推荐：竞聘演讲稿 | 国旗下演讲稿 | 英语演讲稿 | 师德师风演讲稿 | 年会主持词 | 领导致辞 everybody good afternoon:. first of all thank the teacher gave me a story in my own future ideal job. everyone has a dream job. my dream is to bee a boss, own a pany. in order to achieve my dreams, i need to find a good job, to accumulate some experience and wealth, it is the necessary things of course, in the school good achievement and rich knowledge is also very important. good achievement and rich experience can let me work to make the right choice, have more opportunities and achievements. at the same time, munication is very important, because it determines whether my pany has a good future development. so i need to exercise their municative ability. i need to use all of the free time to learn

Nanomaterial-based electrochemical

Nanomaterial-based electrochemical biosensors Joseph Wang DOI:10.1039/b414248a The unique properties of nanoscale materials offer excellent prospects for interfacing biological recognition events with electronic signal transduction and for designing a new generation of bioelectronic devices exhibiting novel functions.In this Highlight I address recent research that has led to powerful nanomaterial-based electrical biosensing devices and examine future prospects and challenges.New nanoparticle-based signal amplification and coding strategies for bioaffinity assays are discussed,along with carbon-nanotube molecular wires for achieving efficient electrical communication with redox enzyme and nanowire-based label-free DNA sensors. 1.Why nanomaterials? The buzzword‘‘nanotechnology’’is now around us everywhere.Nanotechnology has recently become one of the most exciting forefront fields in analytical chemistry.Nanotechnology is defined as the creation of functional materials, devices and systems through control of matter at the1–100nm scale.A wide variety of nanoscale materials of differ-ent sizes,shapes and compositions are now available.1The huge interest in nanomaterials is driven by their many desirable properties.In particular,the ability to tailor the size and structure and hence the properties of nanomaterials offers excellent prospects for designing novel sensing systems and enhancing the performance of the bioanalytical assay. The goal of this article is to highlight recent advances in nanomaterials for such electrical sensing devices. 2.Nanoparticles,nanowires and nanotubes Research efforts on metal and metal semiconductor nanoparticles have flour-ished in recent years.2,3Metal nano-particles are generally defined as isolable particles between1and50nm in size,that are prevented from agglo-merating by protecting shells.Owing to their small size such nanoparticles have physical,electronic and chemical proper-ties that are different from those of bulk metals.Such properties strongly depend on the number and kind of atoms that make up the particle.Several reviews have addressed the synthesis and proper- ties of nanoparticles.2,3Typically,such particles are prepared by chemical reduc- tion of the corresponding transition metal salts in the presence of a stabilizer (capping agent such as citrate or thiol) which binds to their surface to impart high stability and rich linking chemistry and provide the desired charge and solubility properties.Designer particles, including colloidal gold or inorganic nanocrystals have found broad applica- tions in many forms of biological tagging schemes.For example,colloidal quan- tum dots have been widely used for optical bioassays because their light emitting properties can be broadly tuned through size variation.4Recent years have witnessed the development of powerful electrochemical bioassays based on nanoparticle labels and ampli- fication platforms. One-dimensional(1-D)nanostruc- tures,such as carbon nanotubes(CNT) and semiconductor-or conducting- polymer nanowires,are particularly attractive for bioelectronic detection. Because of the high surface-to-volume ratio and novel electron transport pro- perties of these nanostructures,their elec- tronic conductance is strongly influenced by minor surface perturbations(such as those associated with the binding of macromolecules).Such1-D materials thus offer the prospect of rapid(real- time)and sensitive label-free bioelectro- nic detection,and massive redundancy in nanosensor arrays.The extreme smallness of these nanomaterials would allow packing a huge number of sensing elements onto a small footprint of an array device.Metal and conducting polymer nanowires can be readily prepared by a template-directed electro- chemical synthesis involving electro- deposition into the pores of a membrane template.5Carbon nanotubes (CNT)are particularly exciting1-D nanomaterials that have generated a considerable interest owing to their unique structure-dependent electronic and mechanical properties.6CNT can be divided into single-wall carbon- nanotubes(SWCNT)and multi-wall carbon-nanotubes(MWCNT).SWCNT possess a cylindrical nanostructure (with a high aspect ratio),formed by rolling up a single graphite sheet into a tube.SWCNT can thus be viewed as molecular wires with every atom on the surface.MWCNT comprise of an array of such nanotubes that are concentrically nested like rings of a tree trunk.The remarkable properties of CNT suggest the possibility of developing superior electrochemical sensing devices,ranging from amperometric enzyme electrodes to label-free DNA hybridization bio- sensors.7The tailored electronic con- ductivity of conducting polymers, coupled with their ease of processing/ modification and rich chemistry,make them extremely attractive as1-D sensing materials.Newly introduced CNT/ conducting-polymer nanowire mate- rials,8based on incorporating oxidized CNT as the charge-balancing dopants i-SECTION:HIGHLIGHT https://www.360docs.net/doc/f46009237.html,/analyst|The Analyst

关于坚持的英语演讲稿

关于坚持的英语演讲稿 Results are not important, but they can persist for many years as a commemoration of. Many years ago, as a result of habits and overeating formed one of obesity, as well as indicators of overall physical disorders, so that affects my work and life. In friends to encourage and supervise, the participated in the team Now considered to have been more than three years, neither the fine rain, regardless of winter heat, a day out with 5:00 time. The beginning, have been discouraged, suffering, and disappointment, but in the end of the urging of friends, to re-get up, stand on the playground. 成绩并不重要，但可以作为坚持多年晨跑的一个纪念。多年前，由于庸懒习惯和暴饮暴食，形成了一身的肥胖，以及体检指标的全盘失常，以致于影响到了我的工作和生活。在好友的鼓励和督促下，参加了晨跑队伍。现在算来，已经三年多了，无论天晴下雨，不管寒冬酷暑，每天五点准时起来出门晨跑。开始时，也曾气馁过、痛苦过、失望过，但最后都在好友们的催促下，重新爬起来，站到了操场上。 In fact, I did not build big, nor strong muscles, not a sport-born people. Over the past few years to adhere to it, because I have a team behind, the strength of a strongteam here, very grateful to our team, for a long time, we encourage each other, and with sweat, enjoying common health happy. For example, Friends of the several run in order to maintain order and unable to attend the 10，000 meters race, and they are always concerned about the brothers and promptly inform the place and time, gives us confidence and courage. At the same time, also came on their own inner desire and pursuit for a good health, who wrote many of their own log in order to refuel for their own, and inspiring. 其实我没有高大身材，也没健壮肌肉，天生不属于运动型的人。几年来能够坚持下来，因为我的背后有一个团队，有着强大团队的力量，在这里，非常感谢我们的晨跑队，长期以来，我们相互鼓励着，一起流汗，共同享受着健康带来的快

关于管理的英语演讲

1.How to build a business that lasts100years 0:11Imagine that you are a product designer.And you've designed a product,a new type of product,called the human immune system.You're pitching this product to a skeptical,strictly no-nonsense manager.Let's call him Bob.I think we all know at least one Bob,right?How would that go? 0:34Bob,I've got this incredible idea for a completely new type of personal health product.It's called the human immune system.I can see from your face that you're having some problems with this.Don't worry.I know it's very complicated.I don't want to take you through the gory details,I just want to tell you about some of the amazing features of this product.First of all,it cleverly uses redundancy by having millions of copies of each component--leukocytes,white blood cells--before they're actually needed,to create a massive buffer against the unexpected.And it cleverly leverages diversity by having not just leukocytes but B cells,T cells,natural killer cells,antibodies.The components don't really matter.The point is that together,this diversity of different approaches can cope with more or less anything that evolution has been able to throw up.And the design is completely modular.You have the surface barrier of the human skin,you have the very rapidly reacting innate immune system and then you have the highly targeted adaptive immune system.The point is,that if one system fails,another can take over,creating a virtually foolproof system. 1:54I can see I'm losing you,Bob,but stay with me,because here is the really killer feature.The product is completely adaptive.It's able to actually develop targeted antibodies to threats that it's never even met before.It actually also does this with incredible prudence,detecting and reacting to every tiny threat,and furthermore, remembering every previous threat,in case they are ever encountered again.What I'm pitching you today is actually not a stand-alone product.The product is embedded in the larger system of the human body,and it works in complete harmony with that system,to create this unprecedented level of biological protection.So Bob,just tell me honestly,what do you think of my product? 2:47And Bob may say something like,I sincerely appreciate the effort and passion that have gone into your presentation,blah blah blah-- 2:56(Laughter) 2:58But honestly,it's total nonsense.You seem to be saying that the key selling points of your product are that it is inefficient and complex.Didn't they teach you 80-20?And furthermore,you're saying that this product is siloed.It overreacts, makes things up as it goes along and is actually designed for somebody else's benefit. I'm sorry to break it to you,but I don't think this one is a winner.