作业代写：Aquatic ecosystem

下面为大家整理一篇优秀的essay代写范文- Aquatic ecosystem，供大家参考学习，这篇论文讨论了水生态系统。如今，由于大规模开采地下水、用水不节制、水污染严重等一系列问题，使水资源量明显减少，水生态系统遭到严重破坏，所以必须要采用新的治水理念保护和修复水生态系统。可持续发展强调的是人与自然的和谐，不论是开发、利用、治理、还是节约配置、保护等各个环节都是为了资源的可持续利用。

Water pollution is an important aspect of tension of water resource in China, according to the survey of water conservancy department, 700 large and medium sized rivers in China nearly 100000 km long river, for a third of the river polluted, more than 90% of urban water pollution is serious, 40% of the surface water due to pollution and not as a source of drinking water, in addition, 50% of the underground water also contaminated. Currently 64% of people are using unqualified water, all kinds of industrial and living sewage wanton emissions, not only serious damage to the environment, at the same time, make a lot of fresh water resources become worthless due to sewage mixed with waste water, further analyses the present situation of the shortage of water resources.

And uneven distribution of water resources in an increasingly tense form contrast, currently, on the problems in the utilization of water resources, the country still has serious waste phenomenon, most agricultural irrigation area still adopts the traditional flood irrigation, industrial water cycle utilization rate is not high, water waste still can not get good control, people's water saving consciousness still did not get effective reinforcement, the above problems to have very limited water resources are stretched.

Due to excessive development, causes the environment destroyed, the frequency and scope of the el nino year after year to increase and expand, the phenomenon of continuous drought in the region of northern China in recent years occurred in a row, the serious shortage of some rivers and underground water supplies, and due to water shortage, and intensified desertification in some parts of the process of soil aggregates water capacity is greatly reduced, so that further reduce evaporation, so a vicious circle, make the water resource situation increasingly serious, in the Yellow River, for example: cut-off date in advance year by year in recent years, cutoff time also increased year after year.

We should focus on strengthening water conservation, improving water use efficiency and protecting water resources. Around according to the local water resources carrying capacity, water environmental carrying capacity and economic social development, formulate scientific and reasonable water quota, we will accelerate the establishment of a macro control and quota management of combining with water saving water management system, promote the construction of water-saving society, to implement water licensing system as the main way, and actively carry out pilot work of the initial water right distribution, gradually establish a system of paid use of water resources.

Water resources management problem is very complicated, it involves many departments and industry, involving the interests of the different places, pollution, ecology, water saving interweave each other, if the future of the integrated management in the field of progress through discussion, this will help boost to our future work.

Modern water conservancy is different from traditional water conservancy, so the effect is very different after implementation. Traditional water conservancy has not integrated sustainable development into its management system, so it often causes the deterioration of ecological environment, environment and waste of resources. And the starting point of modern water conservancy is using scientific attitude, utilizing the means such as engineering measures and non-engineering measures, give full play to the function of water resources, environmental and ecological functions, to realize the sustainable development of basin water resources and economic society.

Sustainable development emphasizes the harmony of man and nature, the sustainable utilization of resources, the modern water conservancy from resource water conservancy this point of view, whether it is a development, utilization, management, or configuration saving, protection and so on each link is to the sustainable use of resources. Modern water conservancy construction, river management, flood control and disaster reduction, dam building, river basin concept is for the harmony between man and nature, ecological balance.

The problem of modernization of water conservancy is that the United States, Japan and other developed countries have developed and developed after the economic development to a certain level. However, China's economic and social development should also gradually realize the modernization of water conservancy. First of all, we need to guide the development of water conservancy infrastructure in accordance with the guidelines for water control and the new ideas for water control. Enhance the capacity of water conservancy and flood control, and lay a solid material foundation for the modernization of water conservancy. Secondly, we should make some changes in the traditional concept of water control and water control. It is necessary to make a breakthrough in the water conservancy practice in the new period. Third, we will break through the traditional thinking on water management and make full use of scientific and technological progress to push forward the process of water conservancy informationization, and promote the modernization of water conservancy through water conservancy informatization.

We will do a good job in water conservancy planning in the new period. First requires that we adhere to the correct water conservancy policy, development of water conservancy to adhere to the comprehensive planning, overall consideration, and symptoms, the principle of comprehensive treatment, must adhere to the policy of water conservancy planning plan. Secondly, we should pay close attention to the adjustment of planning work, and pay attention to the close relationship between water conservancy and economic society. Achieve the water environment and the economic and social coordinated development, the development of water conservancy planning, arrangement of water conservancy project, must carefully analyze the whole river basin and local practice, in accordance with requirements of the local economic and social development, formulate scientific conform to the planning of local actual, make scientific plans. In the work of water conservancy planning, we should highlight the scientific and technological content of water conservancy work, and promote the modernization of water conservancy with water conservancy informatization.

Practice people and flood in harmony. Both urban and rural construction and economic development should consider floods, and the implementation of flood control and disaster relief and water storage and drought relief and the improvement of ecological environment. The practice of flood control and flood fighting for ever, the current need special emphasis on revision of the flood control plan is perfect, how much to how many parties, reservoir water storage, water channel can go how many, where water diversion, to make it clear and operable. It is necessary to establish the database of flood control works and the social and economic data base to realize the sharing of resources, carefully manage the reservoirs, and vigorously promote the construction of levees so as to better carry out flood control work.

The current situation of drought resistance and put forward the higher request, from the practice, drought relief and water conservancy infrastructure is still insufficient, many parts of the current drought fighting work still use the traditional model, the lack of emergency countermeasures. We should pay attention to and actively explore and propose new policies, such as adjusting agricultural planting structure and promoting new irrigation methods to solve the drought problem. In flood control and drought relief work, we must constantly update our ideas, develop innovative work, keep pace with The Times, so as to better adapt to the development and requirements of the new situation.

In order to adapt to the current water resources development present situation, our country should vigorously develop for water conservancy and development team to further improve the system reform of water resources industry in China, thus ensuring water ecosystem balance and the sustainable development of water resources.

Education of water conservancy talents should change from traditional personnel management to holistic and systematic talent resource development and management. In comprehensively improve the overall quality of existing staff team at the same time, pay attention to talent use and every link of education and training, education and talent to use training on the quantity and quality of the relationship, do both quantity and quality, and given priority to quality. Steadily in the premise of constantly improve the quality of talents, to increase the number of personnel, as well as deepening the reform of personnel distribution system, in accordance with the requirements of system innovation and mechanism innovation, and create a talent with education and training a good external environment.

Education training for water conservancy talents must be closely combined with the actual development of water conservancy projects, and the water management thinking and central work determined by the party group shall be carried out in accordance with different objects and requirements. We should pay attention to the practical application of theory and practice. We should teach students according to their needs, teach them according to their needs, and improve the professional skills and practical work ability of water conservancy workers.

In the development of talent but also pay attention to quality and actual effect principle, development and use of the principle of combining, highlight the key principles of collaboration, only in this way can strengthen the leadership and improve the institutions, formulate the corresponding policy and full implementation of the cadre system reform, to continue to promote the development of water resources projects of each work, to ensure the coordination of water ecosystem and water resources and sustainable development.

Above all, we want to use in the future new water-control concept to protect and repair the water ecological system, strengthen the leadership be mobilized, enhance the water suffering consciousness of the whole society, water goods and precious little water, water saving and water conservancy. Human survival needs a good ecological environment. Only by maintaining a favorable water ecological environment can the sustainable development of the global economy and society be guaranteed.

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Dissertation如何正确选择选题

作为考验英国留学生的最后一环，Dissertation的写作难度其实非常大，单单一个选题就要让大家考虑好久。在选择Dissertation选题的时候，同学们一定要掌握一个度，就是不要太泛也不要太小。下面就给大家讲解一下Dissertation如何正确选择选题。

一、选题和论点的区别？

二者有着联系，但更多的是区别，因为概念不同、内涵不同。在Dissertation写作中一定要搞清楚二者，如果只有选题没有论点，或是只有论点没有选题都不能写出一篇好的文章。选题是写作者提出的问题，是论文要涉及的内容和范围；论点是对选题发表的观点、看法、主张，是对选题的答复。Dissertation选题标准要宽一些，比较广泛。

二、如何选好选题？

1、选题的目标。好题是可论之题加有价之说，就是读者感兴趣的、能在一篇文章的那个在论述清楚的选题，并且有正确、新颖、有理有据的观点。

2、选题的范围。如果题目过大，留学生可能驾驭不了，也许有的学生平时学习十分努力，在某一领域也有一定的成就，忽然就着灵感就发现了一个问题，但是可查找的资料太少，时间也不充足，也就只有很遗憾地放弃了。如果选题过小，显而易见的问题，道理很是简单的，本就难以展开论述却强作论文，也是小题大做了。所以留学生可以跟同学、师哥师姐，或是导师商量自己的选题是否恰当并且有相当的价值。

三、选题要突出哪些特点？

1、创新性。创新是指，对自然或理论提出新见解，而不是对已有研究结论的再次论证，内容激动人心并富有启发性，具有广泛的科学兴趣。一篇Dissertation规模不一定要很大，但是研究的选题要根据学生情况尽量深入。

2、可读性。对于选定的选题，研究工作是否取得了实质性进展，要做的结论是否可靠。

综上所述，在Dissertation选题选取时要有目标，要有一定的范围。要创新，和可读。希望大家在选题的时候一定要注意这些。

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Paper代写：Nano technology’s application in material science

下面为大家整理一篇优秀的paper代写范文- Nano technology’s application in material science，供大家参考学习，这篇论文讨论了纳米技术在材料学中的应用。纳米技术是当今世界上最先进的技术之一，它指的是一大批具有纳米级颗粒操作的创新技术，这也是一种量子领域的规模。以纳米金属材料为例，利用纳米尺度的高表面活性，金属表面容易氧化，形成超薄、致密的氧化层，从而稳定了材料表面，防止了进一步的腐蚀。

As one of the most advanced technology in the world today, nano technogy refers to a bunch of innovative technologies with manipulation of nanometer-size particles. Because the limitation of particle size from 1 nanometer to 100 nanometers which is also a quantum-realm scale, nanotechnology is always operated onan atomic and molecular scale, in the process of which quantum mechanical plays a crucial role. Nanotechnology can be applied in many industries, like material science, micro-electrics and medical fields. Among all the applicable fields, the application of nanotechnology in material science best takes advantage of quantum mechanical in the process. The outstanding character of nano-material is its successful realization of high function material in a small-scale material with high specific surface area, complicated structure and high integration level(Langer and Weissleder 135).

Surface and interface effects: The surface and interface effects in nano-material increases the ration of surface atoms to total atoms because of the material nano-scale, endowing special features of nano-materials(Dong and Pan 996-1002). Take nano-metal materials for example that with the high surface activity endowed by nano-scale, it is much easier for surface metal to get oxidized and form a super thin and dense oxide layer, which would stabilizemetal material surface and prevent further corrosion.

Quantum size effect: As the best example of quantum mechanic’s presentation in nano-technology, nano material presents many special features. According to Shanenko, Croitoruand Peeters (498)，the electron energy level would split from continuous energy level to discrete energy level, which would cause the change of material heat, light, electricity properties because of quantum effect of nano-material when thelevel spacing is larger enough(Dzyuba, Kulchin and Milichko 1-8). For example, there would likely to be a drop of melting point of nano-material because of its high surface energy. Moreover, nano-material is likely to have better sintering property with the ability to be sintered in a lower temperature, making nano-material excellent sintering aids.

Macroscopic quantum tunneling effect: According to Liang et al (415302)，macroscopic quantum tunneling effect refers to the ability of microscopic particle to transmit potential barriers. Because of the special property of nano-size particle, there will be macroscopic quantum tunneling effect in nano-material. For example, the microscopic nickel particle would likely to present the ability of para-magnetism, which would likely to be found on normal nickel particle.

With nano-size particle in the material, many special properties of nano-materials are found in nanno-material. Because of the special heat, magnetic, and intensity properties, nano material can be applied in many special fields in contemporary society.

Catalyst: Because of the high specific surface area, nano-material used as catalyst can increase the reaction rate more than ten times (Freund et al. 8148-67), which realized a much larger contact area of catalyst with other reagents in a chemical reaction compared to regular non-nano catalyst. With the increase in catalyst efficiency, it is possible for people to conduct more reactions in a certain time, which can improve human society in a more efficient way.

Medicine science: The application of nano-material in the field of medicine makes it possible to precisely kill certain virus whose size is also 1-100 nanometers. Because of the same or even smaller size of nano-material, nano-medicine can realize a precise attack on target virus, which would not only increase medicine efficiency and decrease medicine dose, but also reduce side effect caused by the application of certain dosage.

In conclusion, nano-material has realized many ‘mission impossible’, mostly because of special properties caused by its nano-size particles, among which quantum mechanical plays a quite important role. In the future, the application of nano-material is likely to be more and more popular. Nowadays, the bottleneck in the development process of nano-material concentrates on the manufacturing process of nano-material. With improvement in nano-material manufacturing technology, nanomaterial would enjoy a much wider application in the future.

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Paper代写：Interaction in marriage

下面为大家整理一篇优秀的paper代写范文- Interaction in marriage，供大家参考学习，这篇论文讨论了婚姻中的互动。在名为《为什么你不了解婚姻》的视频中，珍娜·麦卡锡讲述了关于婚姻的趣闻轶事。根据麦卡锡的说法，已婚人士比单身人士更幸福，总体上来说，他们的情绪更健康，并且寿命更长。而影响这些事情的原因主要是婚姻中的互动。因为视频中的夫妻是靠彼此之间的交流来解决婚姻问题的，所以互动是最具代表性的。

In the video titled “What you don't know about marriage”, speaker Jenna McCarthy talks about interesting anecdotes about being married. According to McCarthy, there are multiple motivations of being married and staying in a marriage. Studies have shown that married people make more money and are more financially stable. A happily married couple would provide a better life and education for the children. Thus, there children grow up to contribute more positively to the society. Married people are also happier than single people, and are in general more emotionally healthy. Finally, it has been found that married people live longer. Based on these incentives, McCarthy provided tips for the audience to stay happily married, in a humorous manner. The nature of marriage can be looked at from different sociological perspectives. In this case, the paradigm of interactionism is the most represented in this video.

The functionalism perspective believes that different parts of the society work together for the achievement of the “greater good”: progress and development of the society. The key words in this perspective are “cooperation” and “consensus”, which are exactly what marriage is about. In the video, McCarthy acknowledges that there exists difficulty for two different people to live with each other for the rest of their lives. However, people always manage to find ways to make it work, so that the productivity of a married couple turns out to be greater than the productivity of tow individual combined. In addition to added productivity, social cohesiveness is also increased through successful marriages.

From the social conflict perspective, each member in the society is constantly pursuing the limited amount resources in the world. Some people have obtained privilege over the others, which creates different social classes. With such a system established, people will only be able to compete with others that belong to the same social class. Therefore, they must find ways to be most efficient in the competition. As mentioned above, married people earn more and are more financially stable in general. The shared cost of living will reduce the expenses of each individual, which makes marriage an “economic” way of existence in the competition of resources. However, this perspective isn’t in alignment with many other features of marriage discussed in the video.

The difference between symbolic interactionism and the other two perspectives is that it focuses on the micro levels instead of the macro levels. The most visible benefits of marriage happen in the personal level, which is the most observable. For example, increased income, happier lives, better raised kids and longer life expectancy. McCarthy also believes that only those couples with a happy marriage can achieve these benefits. Improvements in the quality of marriage are made in multiple ways, some unexpected. For example, husbands who do more work around the house is more likely to have a happy marriage than the ones who don’t. Wives who are more supportive of their husbands, even if only verbally so, are more likely to enjoy a harmonious marriage than those who give criticisms all the time. It is the proper way of interaction between two adults that generate the best possible outcome for them both.

In conclusion, the interactionism is the most represented in the video, since the speaker has addressed the topic of marriage through the interaction and communication between husbands and wives. Functionalism is the second most represented perspective, as there are implicit suggestions in the video about the positive influence of happy marriages on the society. Finally, social conflict is the least discussed in this topic.

Work Cited

McCarthy, Jenna. “What you don't know about marriage.” Online video clip. YouTube. TED, 14 February 2012. Web.

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Essay代写：Naive realism

下面为大家整理一篇优秀的essay代写范文- Naive realism，供大家参考学习，这篇论文讨论了朴素现实主义。朴素现实主义，指的是我们经常不认为自己不知道，而认为自己知道，也就是我们认为的世界就是现实世界。在不同的文化中，行为的解释是不同的。在一种文化中，一种看似完全无害的行为在其他文化中却被认为是危险的。从朴素现实主义的性质来看，文化的隐性方面是它的最大贡献者。朴素实在论往往不能理解简单行为的语境差异。

In the article “Nice Girls Don’t Talks to Rastas”, George Gmelch, a cultural anthropologist and professor of Anthropology, tells a story about naïve realism that happened to his student, Johanna. Johanna was doing an anthropologist project in a small village in Barbados. While she had been getting along with the villagers very well, their attitude towards her changed dramatically by the end of her stay, almost ruining her entire project. This was caused by her associating with the local Rastafarians, a group of people who were despised by the local community. Not fully comprehending the situation, Johanna has given a perfect demonstration of naïve realism. In this paper, the nature, components, challenges and dimensions of naïve realism will be explored, through the story of Johanna.

The nature of naïve realism is the generalization of all objects, events and living creatures under the same set of beliefs, that is the most familiar for an anthropologist (Spradley 8). Although it is difficult to abandon existing beliefs and make sense of new ones, it is necessary for all anthropologists to do so, so that they can fully comprehend the meaning behind certain social or cultural practices. Although cultural knowledge is only acquired through age, it is deeply imprinted in the mind of people and is almost indistinguishable from people’s intrinsic nature. As a daughter of an English teacher and theater professor from upstate New York, Johanna obviously grew up in a society where equality among individuals is highly valued (Gmelch 32). Her background has thus limited her from seeing things differently. As the topic of social class is so deeply rooted and not openly discussed mostly, it is more likely to trigger naïve realism. At the beginning of her stay, Johanna was enjoying it so much that she was even considering about moving to Barbados and teaching in the local school (Gmelch 32). However, even people with completely cultural beliefs can coexist harmoniously and become friends, when their beliefs are not violated. With Johanna seeing a Rastafarian named Joseph, she had crossed the line. the host family that she got friendly with previously wanted her to move out of the house and leave the village (Gmelch 33). This contrast shows that naïve realism can happen in the most unexpected places when an anthropologist make false assumptions. Adoption of an attitude of complete ignorance would be helpful, as it motivates the anthropologist to discover new worlds.

The challenge of naïve realism lies in the fact that cultural knowledge is very often applied in implicit ways. Despite its importance, verbal communications, such as language, is only a small part of the expression of cultural norms. The rest is communicated through indirect ways (Spradley 8). For example, people’s responses to an environment or their use of a cultural artifact has almost become an automatic mechanism after years of learning and practice. While little explicit expression is involved in such a process, cultural knowledge has worked unconsciously and instantaneously. This mechanism makes naïve realism hard to prevent as it may function without even being noticed. There had already been traces for the isolation of Rastafarian from the local community, from their place of residence and the attitude of villagers towards them, which were certainly overlooked. As a newcomer to the local community, Johanna failed to make observations about the social class distinctions, which directly contributed to her naïve realism. This is partly due to the social class differences and the communal nature of the Barbadian society is only revealed after much longer exposure to the culture. Since most of the villagers are of a similar social class, such distinctions are not obvious, which became misleading. Another reason presented by the author relates to the fact of Johanna being an American (Gmelch 35). It is the social norm of Americans to believe in personal autonomy. They believe that their actions should only be bound by their own beliefs and are none of other people’s business. In a society with distinctive classes, however, people’s actions have to follow certain rules and blurring of class boundaries is strictly forbidden. Therefore, both the implicit nature and the cultural trait of social classes add to the challenge of naïve realism in this case.

Tacit cultural knowledge is equally important as explicit cultural knowledge (Spradley 11). In different cultures, actions are interpreted differently. One action that seems to be completely harmless in one culture can be regarded as dangerous in other culture. In the US culture, it is alright, at least in general, to socialize with whoever one likes, regardless of their social status. For Johanna’s village in Barbados, however, mingling with a Rasta in public is more than a simple action. Selection of such associations is like making a public statement that Johanna categorized herself as the equal of Rastafarian. The simplest actions become no longer simple, but hold symbolic meanings in this case. Consequences of naïve realism are serious for Johanna, due to the bad reputation of the local Rastafarians. News of her association with Joseph travelled fast among the villagers. She was socially isolated immediately (Gmelch 35). She was feeling like carrying a contagious disease as people didn’t want to get close to her. Her downgrading in social class had also resulted in the loss of protection from a verbal harasser. The attitudes of Johanna’s local friend and host family are interesting. As people who know her better than others in the village, Johanna’s friend, a girl from the local school treated her as a victim, giving her suggestions to talk to him no more. The host family was much harsher on her, which is largely due to their fear of being “incriminated”.

There are three fundamental dimensions of human experience, which are cultural behavior, cultural knowledge and cultural artifacts (Spradley 8). Although cultural knowledge, or what people know, is commonly assumed to be the most influential dimension that determine cultural behavior, or what people do, it is not always the case. Sometime what people do will make an impact on cultural knowledge in return. From Johanna’s perspective, naïve realism misleads her to underestimate the power of cultural knowledge. Without understanding the historic background and the importance of social class for the villagers, Johanna only applied cultural knowledge of an American, insisting that individuals shouldn’t be blame for their group image, in this case stereotyping. However, the villagers don’t see things this way. It is mentioned in the article multiple times that despite the considerable amount of rumors, the villagers know very little about the Rastafarians or their beliefs (Gmelch 33). Instead, it is the actions of the majority in the community that shaped their cultural knowledge. It thus matters very little whether Joseph is a nice person who loves nature or not, as his social class and the attitude and actions of the majority matter more for the villagers.

From the nature and challenges of naïve realism, the implicit aspects of cultural knowledge are the biggest contributors of it. Naïve realism often fails to understand the contextual differences of simple actions. Although stereotyping and discrimination are wrong in the American culture, an anthropologist should be able to see the relativity of the “truth”. With careful observations, adoption of an “ignorant” mindset, and more cautious conformity to the local norms, such an incident can be avoided.

References:

Spradley, James P. Ethnography and Culture. Conformity and Conflict: Readings in Cultural Anthropology. Pearson, 2011. pp. 2-13

Gmelch, G. Nice Girls Don’t Talk to Rastas.Conformity and Conflict: Readings in Cultural Anthropology. Pearson, 2011.pp. 31-37

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