Centrifugal pumps are widely used in the industry. It employs centrifugal motion to transfer liquid from one place to the other. Most of water supply systems use this kind of pumps as well. This chapter will give some basic introduction of centrifugal pumps.When a specific flow rate is selected for a system, pipeline resistance curve shows the relationship between head and flow rate with a certain discharge valve opening.
Pipeline resistance characteristic identifies the total head that must be overcome due to water level and pressure difference and the resistance of liquid flow in the pipeline. Pipeline resistance characteristic depends on length of pipe, size of pipe, etc. As shown in Figure 2, a flow rate increase will lead to a head increase. Changing the discharge valve opening will change the water supply capacity under a certain head. Therefore, pipeline resistance characteristic reflects the relationship between the Head and flow rate of water supply.
The intersection point (A) of the two curves is natural working point. Point A satisfies both the head characteristic and the pipeline resistance characteristic. That is that the water supply and the water demand are same. Pump pressure matches system losses. The water supply system runs in steady state.There are six major parts in a centrifugal pump. They are seal, shaft, casing, impeller, bearing and coupling.
Seal can be pack rings or mechanical seal which prevents water leakage and air getting in to keep internal vacuum of the case.
Shaft connects a motor via a coupling. It transmit the output torque of the motor to the impeller during operation.
Casing, housing the internal parts and mounting the pump body, acts as a pressure containment vessel. Water is absorbed into the case and accelerated to a high velocity.
Impeller, the core part of a centrifugal pump, revolves at high speed and develops centrifugal force to increases water pressure.
Bearings, supporting the weight of the shaft assembly and aligning the pump shaft to the motor shaft.
Coupling, connecting the pump shaft and the motor shaft, transmits the motor output torque to the impeller.










本篇文章主要讲艺术家方式改变的原因,保罗·兰德准备了大量的肖像、绘画和雕塑作品来展示他的思想。根据Fred(2006)的说法,Paul Rand采用的宣言是综合主义。心理合成主义被认为是一种特殊的艺术哲学,它揭示了个人的观点,也表达了与艺术运动相关的优势。保罗·兰德捕捉到了人们的情感和兴趣。他开发的一些产品包括IBM的海报、早期的广告设计和西屋电气的标识。本篇ps代写文章由英国论文通AssignmentPass辅导网整理,供大家参考阅读。

Paul Rand had prepared a wide range of portraits, paintings and sculptures that demonstrated his ideas. The manifesto that Paul Rand adopted was synthesism according to Fred (2006). Psychosynthesism is regarded as a specific philosophy of art that exposes the personal views and also expresses the advantages that associate with the art movement. Paul Rand has captured the emotions of people as well as their interests. Some of them he developed included those in IBM posters, early advertisement designs and Westinghouse sign.
It has a close relationship to the business model practiced. Additionally, it is in line with his manifesto because it gives a complete combination of technical knowledge as well as intuition that has eventually brought out the perfect design for the business.Modernism was also visible in his designs. According to Sarah (2014), the powerful symbolism had showed the presence of disquieting atmosphere. The above logo is for Yale Company and it had tried to give connections on various thoughts and design theories including impressionism and pop art. It had a slight touch of modernism in it. By this way, he also tried to show his manifesto on creative thinking and that good design is all that is required. The approach of artist changed over time due to the following reasons:
The expectations and level of understanding of people increased over a period of time
As most of his artworks are from personal viewpoints, he made it simple and even clearer as days passed by
More expressions were added to the output as such kind of arts reached people instantly
Designs were chosen by Paul Rand to create because some had business awareness impacts and significances. Some designs are solid forms of arts that can exist for a longer run. This is feasible only if such historical forms are placed in a museum or in public place where people can understand its significance
Paul Rand has tried his hands on varied forms of arts and he was also regarded as the artist of metaphysical. His science fiction cover art was very much conversational, influential and historical by nature. His works had high influences as they had clear landscapes suiting the urban setting and used darker state with shadowed spaces to depict the scenario. His artworks tend to depict liminality, most of the times according to Lucie (1972).



本篇文章講的是服裝對於歌舞的重要作用,在許多舞蹈視頻中,韓國服裝色彩斑斕,充滿活力。在一些歌曲中,如Davichi的“don ‘t say goodbye”,有一種獨特的風格憂鬱的顏色。服裝是根據歌曲的整體主題和主題來穿的。在4分鐘的歌曲《恨》中,服裝是根據主人公不同的情感穿著的。對這些歌曲的分析表明,為歌曲選擇合適的服裝是很重要的。這在這首歌的整個過程中都很明顯。除此之外,還有很多因素使得服裝對這首歌很重要。服裝的結構能引起觀眾的興趣。有許多因素幫助歌曲的整體主題和服裝發揮了重要作用,在這方面的努力。本篇代寫essay文章由英國論文通AssignmentPass輔導網整理,供大家參考閱讀。

Korean costumes are colorful and vibrant in many of the dance videos. In some songs such as “don’t say goodbye” by Davichi, there is a distinctive style of somber colors. Costumes are worn based on the overall theme and motif of the songs. In the song “hate” by 4 Minute, the costumes are worn in accordance with the different emotions felt by the protagonist. Analysis of these songs shows it is important to essay the right costumes for the songs. This is clearly seen along the course of the song. Apart from this there are a lot of factors that make costumes important for the song. The costumes are structured in a way that it creates interest in the minds of the audience. There are numerous factors that aid to the overall theme of the song and costumes play an important role in this endeavor. (Arvidsson, 2015)
On analysis of the “Red” by Hyuna there is a definitive explanation of the colors and props. The color red in itself means that there is strong strength, boldness and sexuality. In the end of the song all the dancers and actors are made to wear red attire. This shows that the people can be as bold as they want in societies. It is symbolization for sexuality. Hence, the colors and props in the song resonate with the overall narrative theme of boldness and sexuality.
Props are essential in any music video. It is especially very important in Korean video. It has been found that they use props to elucidate a number of views. To explain about the importance of props and symbolization in Korean videos, analysis of the song EXID “up and down” has been done. Basic lyrics of the song state the ups and downs of a relationship. This song is maneuvered with colors and insinuations. In the first few shots, there is fruit, fish and Barbie dolls that have been cut and joined with strange combination (Arvidsson, 2015). The viewer should understand that it means that in relationship certain, people fit like the strange combinations in the video. In the first prop, the avocados are paired with a Barbie head. Apart from this, a fish tail has been attached to the torso of Barbie. There are slinky prints which is a jarring image. These prints tie the feline print-wearing magicians who are dexterously playing with many objects together.



对任何组织的投资都被认为是一个重要的步骤,需要对财务报表进行彻底的分析。通过财务比率,帮助用户对关键业务风险有一个清晰准确的认识(Weil, 2017)。在给定的乔·道尔案例中,伍尔沃斯资产负债分析公司将有助于阐明包括该公司使用的成本评估模型在内的关键领域。它反映资产和负债以及无形资产,从而帮助客户对投资做出有效的决策。


资产是财务报表资产负债表中分析的最重要的方面,从而帮助用户计算流动比率和速动比率以及负债率。它有助于确定公司是否有能力通过可用资产支付其短期和当前债务。公司使用成本模型来确定财产、设备和工厂的价值(Berk & DeMarzo, 2017)。成本模型和重估模型都是在企业需要选择这两种成本模型中的任何一种作为会计政策的规则下进行的,并且将该政策应用于整个物业、厂房和设备是非常必要的。





成本被认为是一个历史数字,并不意味着要修改。另一方面,企业需要计算资产的折旧。选择最合适的折旧方法是采用直线法,因为直线法被认为是做出有效决策和确定政策的重要因素(Britton & Waterston, 2013)。


Investment in any organization is considered as a vital step which is required a thorough analysis of the financial statement. It helps the user to get a clear and precise idea about the key business risk which is obtained from the financial ratio (Weil, 2017). In the given case of Joe Doyle, the company Woolworth asset and liability analysis will help to throw light on the key areas which include the cost valuation model utilized by the company. It reflects the asset and liability and the intangible assets and thus help the client to take an effective decision regarding the investment.

Analysis Cost model and revaluation model

The asset is the most important aspect which is analysed in the financial report balance sheet and thus helps the user to calculate the current ratio and quick ratio along with debt ratio. It helps to determine the company ability pay its short term and current obligation by the available asset. The company uses a cost model to determine the value of the property, equipment, and plants (Berk & DeMarzo, 2017). The cost model and revaluation model are under the rules that a business firm needs to select either of the two cost models as its accounting policy, and it is essential to put the policy on the entire property, plant, and equipment.

Cost model

When a business implements cost, the property and plant, equipment is levied at its cost less following accumulated depreciation and impairment losses.


Carrying Amount (cost model) = Cost – Accumulated Depreciation – Accumulated impairment losses

The cost is considered to be a historical figure and does not imply to modify. On the other hand, the business firms required to calculate the depreciation on the asset. The selection of the most suitable depreciation method is implemented as the straight line method is considered as an important matter in taking an effective decision and the firm policy (Britton & Waterston, 2013).



在过去的60年里,pta有了惊人的增长。有许多州从一开始就是pta的一部分,现在正在做出创新的安排。在国际政治经济中,PTAs的关键特征有所增加(Missios, Saggi和Yildiz, 2016)。这背后的主要原因是,许多国家通过增加其他成员来扩大。一些pta增长背后的原因是什么?为什么其他的pta没有扩张?在这个重要的问题上,只有很少的重点被强调(Seidmann, 2009)。本文所关注的双边贸易协定和轮辐协议并没有增长。

另一方面,多边贸易协定的规模也在不断扩大。对于新的成员,可能作出的一些安排是开放的,涉及贸易和所有成员的分配是相同的。在新州成为pta的一部分后,它们按时间顺序排列。未来,PTAs仍希望其他成员加入。与此同时,PTA希望在全球范围内发展(Lee,罗兰-霍尔斯特,van der Mensbrugghe, 2004)。一些事实表明,更大的市场有可能增长,而不是较小的安排。人们注意到,太平洋贸易协定的重点在于使新成员国成为其成员,而这一重点是建立在这些成员国在政治和经济上的一致性基础上的。需要与pta现有参与者相似的地方如下:市场规模、政体类型、贸易开放与政治统一性(Ghosh and Yamarik, 2004)。在本文的帮助下,也为今后的研究提供了机会。比如,目前只重视pta,并没有太多的努力去了解国际机构成长的原因(Bagwell and Staiger, 2001)。

为了确定本分析的结果仅限于pta,还需要进一步的研究。此外,未来的研究将解释国际机构大幅增长的原因(Seidmann, 2009)。本文分析了影响PTA在全球范围内发展的更多因素,包括PTA与国家之间的战略互动、成员的规模分布以及PTA上一次扩张的时间长短。此外,双边贸易协定很少扩大的发现并不局限于经济机构(Chang and Xiao, 2015)。


There has been an incredible growth of PTAs in the last sixty years. There are many states, which are part of PTAs from the beginning and now make innovative arrangements. In the international political economy the crucial features of PTAs has increased (Missios, Saggi and Yildiz, 2016). The main reason behind it is that many of states have expanded by adding other members. What is the reason behind the growth of some of the PTAs and why other PTAs do not expand? On this important issue, only little focus has been emphasized (Seidmann, 2009). There was no growth of bilateral PTAs and hub and spoke agreement, which this paper has focused upon.

On the other hand, PTAs, which are multilateral, are enlarging. To the new members some arrangements, which are likely to be made, are open with respect to trade and the distribution of all the members is homogenous. After new states became part of the PTAs they exhibits chronological grouping. PTAs still wants other to make its member in the future. At the same time, PTA wants to grow globally (Lee, Roland-Holst and van der Mensbrugghe, 2004). Some facts have been shown which shows that instead of smaller arrangements there are chances for the growth of larger markets. It has been noticed that the focus of the PTAs for making new states its member is based upon their political and economical consistency of previous members. The points which needs to be similar to that of existing participants of PTAs are as follow; market size, regime type, trade openness and political uniformity (Ghosh and Yamarik, 2004). With the help of this paper, there are chances for the researches in future also. Like, at present the more emphasize is given to only PTAs and not many efforts are applied for knowing the reasons for the growth of international institution (Bagwell and Staiger, 2001).

For determining the outcome of this analysis are restricted to PTAs there is need for future research. In addition, future research would explain the reason behind the large growth of international institution (Seidmann, 2009). This paper have analysed more factors which would help to guide the growth of those institution which are spread all over the world, which includes strategic interaction among PTAs and among states, the size distribution of members, and the length of time since a PTA last expanded. Moreover, the finding that bilateral PTAs rarely expand is not limited to economic institutions (Chang and Xiao, 2015).

research paper 代写-研究论文调查

research paper 代写-研究论文调查



research paper 代写-研究论文调查

In primary research, there is analysis of one aspect. It answers the exact question that the researcher is looking. Primary data is the actual raw data that has been obtained from research. From the raw data that has been collected, a number of analyses are done to understand the impact of the data. Feasibility of collecting large volumes of data is not possible, in those situations, primary research has been used. Volume of data and conditions in which the data has been gathered are all under the discretion of the primary researcher. The disadvantage of this research is that large volumes of data collection are not possible owing to the time constraints and resource availability. In those cases, there is a collection of data from the review articles. Review articles critically analyze the different viewpoints of the primary and review articles. In review articles more than actual research being conducted, there is critical analysis about the findings found in other researches. This analysis could be of other review articles or research findings. It then forms opinion and determines the notion of the majority. It also question about the validity of the research that has been conducted and tries to develop the future trends that are required. In review articles, large volumes of data collection are possible with little resources.

In the article, “Metastases, simulating mammary cancer, in prostatic carcinoma under estrogenic therapy” a number of references has been used. Analysis of the references has been done in the following






Global interconnectedness and economic integration can be seen to increase at a rapid speed and has started to become extremely complicated. The new international order can also be categorized by shifting the central point of the international economy turning out to be an emerging economy. As emerging economies have been rising as significant place, there has been a reinforcement of appropriate level of international interconnectedness. While China is the leader in this context, other emerging economies have been increasing their presence across the global economic affair, in reflection by the rising prominence of bodies like BRICS nations, and since recently, the G20. The mechanisms of IGO result in the enhancement of cooperation in the following ways. There seem to be layers of specific and generic cooperation instruments, typically by the agreements of trade or partnerships of umbrella regulation, perhaps by certain lawful instruments, whether it be treaties or the other. In addition, majority of the experiences related to cooperation are inclusive of both, informal and formal attributes.

This research focused on understanding the effectiveness of IGOs in general, while further specifying the research to a case study that is of G20 mechanisms. The research question set for this report is: “How G20 helps in providing an effective process to maintain a cooperative link between emerging nations and developing nations?” As mentioned, for conducting this research, the methodology of case study has been used based on which key findings have been interpreted and analysed, moving ahead to draft key conclusion.



在这种情况下,利益相关者同意在规定的时间内以固定的价格出售特定的证券。尽管市场波动,但它们仍保持不变。这允许参与过程的涉众将所涉及的风险最小化。在市场上,如果投资者以一个价格购买了在一段时间内购买资产的权利,那么他实际上购买了看涨期权(Bernanke, 2006)。如果他购买了以特定价格出售资产价值的权利,他就购买了看跌期权。这是两种可用于求导的选项。




它们与期权的基本主题相同,但安全的概念在这个因素中发生了变化(Bernanke, 2006)。保持证券的固定价格和固定利率更为重要。它还允许投资者在市场上制造未来的金融证券。


In this the stakeholders agree to sell the particular security for a fixed price within the stipulated time frame. They remain the same in spite of the fluctuations of the market. This allows for the stakeholders involved in the process to minimize the risks involved. In the markets, if the investors purchase the right to buy an asset within a time frame at one price he has essentially purchased the call options (Bernanke, 2006). If he purchases the right to sell the asset value for a particular price he has purchased the put option. These are the two kinds of options that are available for the derivative.


In this kind of derivative the stakeholders agree to swap the benefits of the particular derivative. This would allow the stakeholders to mines risk in the process.


They also work in the same underlying theme as the Options but the concept of security is changed in this factor (Bernanke, 2006). There is more importance given to maintaining the fixed price and the fixed interest rate of the security. It allows the investor to make future financial securities in the markets as well.





这些国家执行的教育政策的主要目标是确保所有儿童都得到平等的教育机会,尽管教室内的多样性有所增加。Bennett(2010)认为,教育政策的实施应该包括有责任实现人们思考和对待教育的方式的必要改变。这些政策很重要,因为它们确保所有人都应该得到应有的尊重。Tharp(1994)指出,由于学校和大学中不同种族群体之间的多样性增加,导致了教育的动态转变。当前,世界各地的许多学校在政策上越来越注重文化。这些学校也讨论了很多关于如何在课堂内创造合适的教育文化,以及如何在课堂外创造一个师生友好的环境(DeBoer et al ., 2000)。


In present times, education is the primary need for an individual and a nation. It is important for people to be educated, both for their own growth and for the collective growth of the nation. Without proper educated individuals, the growth of a nation is certainly hampered. Thereby, it is important for the government of every nation to ensure that all the individuals are getting a proper education. In order to implement the same in a proper manner, governments of each and every nation create several educational policies. These policies are created for the purpose of upliftment of the society and its people. In this research, the discussion will be focussed on the importance of education policies. Further, the efforts of the educational policies to improve educational attainment will also be discussed.

Importance of education policies

The primary goals of the educational policies which are implemented by the government of the nations is to ensure that all the children are being provided with an equal education opportunities in spite of the increase diversities within the classroom. Bennett (2010) stated that the educational policies should be implemented in such a manner that they include the responsibility to implement the required changes in the way people are thinking and approaching the education. The policies are important as they ensure that all people should get the respect which they are deserving. Tharp (1994) stated that a result of increase in the diversity among different ethnic groups in the schools and colleges has led to the dynamic shift in the education. In the present times, a large number of schools in all parts of the world are focussing more and more on the culture in their policies. These schools also discuss a lot about the ways to create suitable educational culture within the classrooms and a friendly environment among teachers and students outside the class (DeBoer et al, 2000).