文档库 最新最全的文档下载
当前位置:文档库 › 空调和制冷中英文对照外文翻译文献

空调和制冷中英文对照外文翻译文献

空调和制冷中英文对照外文翻译文献
空调和制冷中英文对照外文翻译文献

中文资料翻译

India HVAC&R Goes Global

The total market size in 2008 for the HVAC&R industry in India was approximately $2.5 billion. That year, India produced roughly 5 million refrigerators, 2.5 million room air conditioners, packaged air conditioners of various capacities, and packaged chillers of reciprocating, scroll, screw and absorption types.

Other HVAC&R products manufactured in India include air-handling units, fan-coil units, refrigeration systems for cold rooms and freezer rooms; low-temperature brine chillers for industry; and commercial refrigeration equipment for food stores and supermarkets. The following stories describe some Indian companies that are making their mark internationally.

Heat Pumps in Denmark

Thermax absorption heat pumps and chillers are finding increasing acceptance with European and U.S. clients that want energy-efficient equipment. Businesses are demanding systems that can reduce carbon emissions and help cope with global warming.

Over the last decade, Thermax has worked in optimizing energy use in Denmark by installing absorption heat pumps for centralized heating, which is a reverse application of centralized cooling with absorption chillers. Hot water from a central generation facility is used for space heating in town buildings. The heating companies reduce the energy intensity at generating centers by tapping low-grade heat from other sources such as geothermal heat from sandstone aquifers or waste heat from town

incinerators.

Since its first installation in 1999, Thermax absorption heat pumps are operating in several district heating installations. Recently, the company is fulfilling an order for a 3.4 MW steam absorption chiller to be installed in downtown Copenhagen as part of a district cooling project. The total capacity of the plant is 15 MW, which uses the output of the Thermax chiller, free cooling using seawater and ammonia chillers. The plant will save approximately 2,500 tons (2268 Mg) of carbon dioxide per year.

In Spain, Thermax has commissioned chillers in hotels and office buildings that run on water heated by solar panels. Clients elsewhere in Europe also use Thermax chillers that work on exhaust gas from fuel cells or excess steam from old boilers that use wood waste.

In the United Kingdom, large retailer Tesco has installed Thermax chillers at two stores as part of a plan to reduce its carbon footprint through various measures, including using energy-saving devices. The chillers use water from the cogeneration system that Tesco has installed for generating power.

In the United States, a 1,100 kW test engine installed at a plant of a leading plastics manufacturer in Ohio generated a great deal of waste heat. Thermax harnessed this waste heat to drive an absorption chiller. Waste heat is converted to energy savings as chilled water from this system is used for process cooling in the plant. More than 150 business customers in the United States are gaining from energy profits and green reputations by installing Thermax chillers. Recently, the University at Albany-State University of New York,replaced its old, inefficient cooling system with a 1,400 ton (4924 kW) chiller that works on hot water. The university has gained 35% energy efficiency with substantial savings in operating and maintenance costs. The Henry Ford Museum in Detroit and Colorado School of Mines in Golden, Colo., also have Thermax chillers.

Under a recent strategic agreement, Trane, a leading global indoor comfort systems and service provider for the North American market, will source and distribute Thermax chillers.

Heat Wheels in Australia

What do a hospital in Australia, a university in Florida, a high-tech commercial building in Dubai, a church in Brazil, the Olympic stadium and airport in Beijing and an indoor swimming pool in Tasmania have in common? The indoor air quality provided by DRI, Desiccant Rotors International, is a heat wheel manufacturer in

Delhi. A flagship company of the Pahwa Enterprises, it is the largest privately held HVAC group in India.

King Edward Memorial Hospital (KEM) in Perth, Australia, is a renowned, state-owned health-care provider for women,with more than 400 beds and a large staff of specialists. KEM is geared to provide the highest standards of health care and patient servicing, where indoor air quality plays a vital role. The original HVAC installation carried out 30 years ago was ahead of its time. It incorporated heat recovery wheels (HRW) to save energy and provide better indoor air quality. The wheels were imported from the United States and the aluminum substrate was supplied in 20 segments. With the passage of time, the substrate disintegrated and fell off in all four wheels. As a result, the wheels became non-operational and KEM Hospital and the authorities had a tough time finding a supplier that could supply new wheels in sections that could pass through the doorways without breaking down the walls of the AHU room. They also had difficulty finding an installer who could dismantle the old steel frames, also in sections, so the building could remain intact.

Fortunately, DRI, through its Australian agent agreed to custom manufacture a five-segment wheel in its factory, ship it to the site, install and commission the new wheel, all under the supervision of a local consultant. With the completion of the retrofit project, KEM Hospital’s indoor air quality improved. Among other projects DRI has done are the Beijing Olympics; Pacific Controls, which is Dubai’s first green building; and the second tallest building in China, which is the 450 m (1,476 ft) tall Nanjing Green Land Square, which are all equipped with Ecofresh wheels produced in Delhi.

Other DRI facts:

? Largest global producer of enthalpy wheels;

? World’s only AHRI and Eurovent certified rotors manufacturer;

? Integrated rotor manufacturing facility;

? Wo rld-class rotor (enthalpy as well as desiccant) test facility;

? Sales network spread over India, U.S., Brazil, Europe, UAE,Turkey, Africa, China, Malaysia, Philippines, Japan, Korea and Australia; and

? Awarded AHRI certification performance award for ac hieving a 100% success rate for seven consecutive years.

Heat Pumps in Europe

Blue Star began exporting drinking water coolers to the Gulf countries in the

Middle East as early as 1974. The large stainless steel storage tank design of the coolers was suitable for India and the Gulf countries where city water supply was intermittent. Although local buyers initially resisted buying Blue Star coolers, with improved quality and timely deliveries the company’s sky-blue water coolers became visible at every mosque and school in Dubai and Kuwait.

In the early 1990s, Blue Star made large investments in new plant, machinery, technology and R&D for HVAC&R products to handle the growing market within the country. In 1999, the company started exporting ducted air conditioners of up to 7.5 ton (26 kW) capacity, as well as window and split room ACs. A substantial part of these products were specially designed for an American company; prototypes were built and tested in India and the U.S., to suit the needs of the U.S. manufacturer for the Middle East market. Labeled with the U.S. brand name, but with the words “Made in India,” customers no longer hesitated to buy such products. As many as 170,000 unitary products were sold within a few years.

Buoyed by this success in the Middle East, the American company decided to enter the European market with its brand and once again chose Blue Star to design ductable heat pumps for this market, using R-407C refrigerant (instead of R-22 in the Middle East) with a sleek appearance, compact footprint, stringent safety and noise requirements. Eleven thousand units have been shipped to Europe.

With $500,000 in exports in 1999, today the company has nearly $25 million in exports and ships drinking water coolers, ducted split ACs and heat pumps, and air-handling units, fan coil units, scroll chillers, screw chillers, close control packaged ACs, as well as special units for the telecom market. A large number of distributors and business partners help the company to cater to the growing market in various neighboring countries. With an increased R&D spending, Blue Star plans to ship more products to the international market.

Coolers in Europe

Air-cooled fluid coolers (ACFC) are as the radiator in your car, helping to keep the engine cool, by circulating cooling water through the engine jacket and the radiator. They are larger in cooling capacity and are used in captive power plants to cool the diesel engines or gas turbines that drive the electric generators.

With scarcity of water and shortage of electric power in most parts of the developing world, International Coil Ltd (ICL) of Delhi has developed ACFCs to cool the jackets of diesel engines or gas turbines running generators in 8 MW power plants

or larger capacity with multiples of 8 MW, used by industry to run their plants, instead of cooling towers, which consume large amounts of water.

With hundreds of installations of ACFCs in India, millions of cubic meters of water are being saved, proving them to be a good environment-friendly solution. Certified by AHRI, these ACFCs can also be supplied with Heresite coating to reduce corrosion in saline atmospheres. Internationally reputable manufacturers of power plants running on diesel engines or gas turbines including Rolls Royce of England, MAN of Germany, Wartsila of Finland and Cummins of the U.S., have signed OEM agreements with ICL to use ACFCs on their supplies of generators to most parts of the developing world.

MEP Contracting in Middle East

In the early 1970s, the Middle East embarked on ambitious plans of modernization and building construction.

With a small domestic population, the region depended heavily on construction labor from the Indian subcontinent, which is only a few hours away by air. Arab and European companies with offices in the Gulf lured experienced Indian HVAC engineers with salaries three to four times higher than salaries prevailing in India, free company cars, petrol cheaper than water and no income tax. Voltas, being one of the largest HVAC companies, suffered crippling manpower losses that took time to replenish with the help of freshly graduated engineers.

In a way, these events turned out to be a blessing in disguise, because Arab employers were so impressed with Indian engineering skills that many of them started doing business with Voltas in joint ventures, which took on large HVAC contracts initially and then went in for complete electro-mechanical projects, including electrical and plumbing.

HVAC for Queen Mary II

The experience gained from work in the Gulf States and contacts established with international suppliers all over the world of equipment and accessories, including piping, sheet metal, and insulation, led to Voltas’s ambition to take on the world.

So, Voltas bid and won contracts in 30 countries and three continents, including the HVAC contract for Hong Kong Airport and the largest luxury liner ever built, Queen Mary II, while it was under construction in a French port.

The company is part of the $62.5 billion Tata Group and is the number two air-conditioner brand in the country. The firm manufactured the first room air

conditioner in 1954. It has overseas offices in Dubai, Abu Dhabi, Qatar, Bahrain, Singapore and Hong Kong.

Author:Hiru M. Jhangiani

Nationality:India

Originate from:Air Conditioning and Refrigeration Journal of 24 (2004) 55-60

印度暖通空调与冰箱工业走向世界

2008年,印度的暖通空调与冰箱工业的市场总量为25亿美元。那一年,印度大约生产了500万台冰箱,250万台室内空调,组装出多种功能的空调和往复,滚动,螺杆,吸收等类型的冷却装置。

在印度,其他类型的暖通空调与冰箱产品包括冷藏室和冷冻室的空气处理机组、风机盘管机组、制冷系统;工业用低温盐水机组,食品商店和超级市场的商业用制冷设备。下面的几个故事描述了一些正在使自己的品牌走向国际的印度公司。

丹麦的热汞

契马黑吸收热汞越来越多地被那些想要获得节能设备的欧洲和美国客户的认可。现在的企业都在要求暖通空调和制冷设备能减少碳的排放量,以应对全球性变暖。

在过去的十年里,契马黑曾在丹麦通过为集中供暖系统安装吸收热泵的方法优化能源的使用,这是用吸收式制冷机集中冷却的反向运用。中央系统设施中的热水被用于城市建筑物的室内供暖。供热公司通过像砂岩含水层的地热能源或城镇焚化炉的废热等其他热能来源来供应低品质的热能的方式来降低生产中心的能源强度。

自1999年的首次安装以来, 契马黑的吸收热泵目前正运行于几个地区的供热装置中。最近,该公司正在完成一笔3.4兆瓦的蒸汽吸收式制冷机组订单,这个机组安装在哥本哈根市中心,作为地区冷却项目的一部分。设备总容量为15兆瓦,使用的是契马黑的冷却装置输出,通过海水和氨冷却装置达到免费冷却。该工厂将每年节省约2500吨(2268兆克)的二氧化碳排放。

在西班牙, 契马黑的冷却装置已经委托装入了用太阳能供应热水的酒店和办公大楼。欧洲其他地区的客户也用契马黑冷却装置来排出燃料油箱内的废气或旧锅炉中的过量蒸汽以避免木材的浪费。

在英国,大型零售商乐购在其中的两家商店安装契马黑冷却装置作为通过各

种方法来减少碳排放量这一计划的一部分,包括用节能装置。冷却装置用的是用于乐购发电的冷热电联产系统产生的水。

在美国,一台1100千瓦的测试引擎安装在一间俄亥俄州领先的塑料制造商的工厂内,这样的工厂会产生大量的废热。契马黑利用这个余热作为吸收式制冷机的动力。余热转化为能量储蓄是因为来自这个系统的冷冻水被用于冷却工厂生产过程中产生的热。超过150个美国的客户通过安装契马黑冷却系统来获得能源上的利益和绿色环保的良好声誉。最近,奥尔巴尼洲大学纽约城市学院用一个有1400吨(4924千瓦)的热水冷却装置来代替旧的、低效率的冷却系统。这所大学在操作和维护成本上的实质性节约能够达到35%的能源效率。在底特律的亨利福特博物馆和的地雷和科罗拉多州金山的科罗拉多州矿业学院也有契马黑冷水机。

在最近的战略协议中,在北美市场被誉为全球领先的室内舒适系统和服务提供商的特灵空调会生产提供契马黑冷水机。

澳大利亚的热车轮

澳大利亚的医院、佛罗里达州的大学、迪拜高科技的商业建筑、巴西的教堂、北京的奥林匹克竞技场和机场、塔斯马尼亚岛的室内游泳池,这些建筑它们有什么共同特点呢?都是由DRI(国际干燥转子)—一个德里的热车轮制造商来提供的优质室内空气。它是Pahwa集团旗下的公司,印度最大的民间暖通空调集团。

在澳大利亚佩思的爱德华国王纪念医院(凯恩美),是一家非常著名且专门为女性提供服务的国有医疗机构,拥有超过400个床位和许多专家。凯恩美提供最高水准的医疗保健和患者服务,因此室内空气质量起着至关重要的作用。原来的暖通空调30年前就超过了它的使用时间。它采用热回收车轮(HRW)来节约能源和提供更高质量的室内空气。转轮是从从美国进口的,铝基板由20块组成。随着时间的推移,基体瓦解四个轮子都开始下降。结果,转轮开始不工作,凯恩美医院和当地政府经过了一段艰难的去寻找能提供新的轮子的供应商的时期,且要求这些轮子能被分成几个部分通过门廊,从而不必打通空气调节装置室的墙。同样,寻找到一个能够分几个部分拆除旧的钢结构来确保建筑保持完好的安装工人也十分困难。

幸运的是, 国际干燥转子通过在澳大利亚的代理公司,同意在他的工厂定制一个五部分的机轮,并用轮船运到澳洲,安装和调试新的机轮都是在当地的顾问

的监督下进行的。由于新转轮的安装完成,凯恩美医院的室内空气品质有了显著改善。其他DRI已经完成项目有北京的奥运会馆,迪拜的第一个绿色建筑——太平洋控股;中国第二高建筑,450米(1476英尺)高的南京绿地广场,这些都配置有德里生产的自动净化车轮。

其他DRI事迹:

?全球最大的焓轮生产商;

?世界上唯一的AHRI和EUROVENT双重认证的转子制造商;

?综合转子制造设备;

?世界级的转子(焓以及除湿)测试设备;

?销售网络覆盖印度、美国、巴西、土耳其、阿拉伯联合酋长国、欧洲、非洲、中国、马来西亚、菲律宾、日本、韩国和澳大利亚;

?授予AHRI认证的连续7年实现100%成功率。

欧洲的供暖装置

早在1974年,蓝星公司就开始出口饮用水冷却器给中东地区的海湾国家。大型不锈钢储罐设计冷却器很适合印度与海湾国家,那里的城市供水是断断续续的。尽管当地的购买者最初抵制购买蓝星冷却器,但质量的改进和及时的交货,使这个公司的天蓝冷水器在迪拜、科威特的清真寺和学校变得随处可见。

在20世纪90年代初,蓝星公司在空调制冷领域的工厂、设备、技术和研发方面都做出了巨大的投资,以此来应对这不断增长的国内外市场需求。1999年,公司开始出口管机空调达到7.5吨(26千瓦)的水平,与自动控制窗口和活动房间一样。这些产品中很大一部分是专为一家美国公司设计的;设备的原型在印度和美国完成建造和测试。以适应美国制造商在中东市场的需求。贴上美国的品牌名称,但却写着“印度制造”,顾客在买这样的商品时将不会再犹豫。在几年之内,多达17万件统一的产品已出售。

值得一提的是,这次在中东的成功使那些美国公司决定进军欧洲市场,并且再次选择蓝星来为这次的市场设计进口热泵。这次的设计采用R-407C这种具有雅致的外观、紧凑的足迹、严格的安全和噪音控制要求的制冷剂(而不是在中东的R-22)光滑形状、严格的安全及噪声的要求。11万件这样的产品已销往欧洲。

从1999年的50万美元出口额开始,到今天,该公司已拥有近2500万美元在出

口和装载的应用水冷却器、管机分离空调和热泵、空气处理机组、风机盘管机组、往复式冷水机、螺杆冷水机、装载关闭控制空调,以及为电信市场制造的特殊机组。大量的分销商和商业伙伴帮助该公司满足了众多周边国家日益扩大的市场需求。随着在研发资金投入方面的增加,蓝星公司计划将为国际市场出口更多的产品。

欧洲的冷却机

流动风冷却器(ACFC)在你的汽车里是作为一种散热器,通过在发动机汽缸和散热器两者之间的不断循环冷却,来确保发动机保持在一定温度内。他们在冷却能力上有着更大的优势,可用于自保电厂中冷却驱动电动发电机的柴油机或燃气轮机。

由于在发展中国家,许多地区都存在着缺乏水和缺乏电力地情况,因此在德里的国际线圈有限公司(ICL)已经开发了流动风冷却器来冷却柴油机引擎或燃气轮机,并创造出发电机组在8兆瓦或是8兆瓦的倍数的更大容量的电厂,这些电力在工业上被用于工厂运作,而不是需要消耗大量水的冷却塔。

由于在印度有着大量的流动风冷却器设施,百万立方米的水被节约下来,这也证明他们是一个解决环境友好问题的好方法。经过AHRI的认证,这些流动风冷却器也可以配置上赫尔斯特酚醛塑料涂层以减少盐碱地区的腐蚀。国际著名发电机制造商包括英国的罗尔斯·罗伊斯,德国的MAN,芬兰的瓦锡兰和美国的康明斯,已经和ICL签署了OEM协议,在他们的柴油发动机或燃气涡轮机上的配备流动风冷却器,以供给大部分发展中国家。

中东的机电合同

在70年代早期,中东走上了雄心勃勃的现代化和房屋建筑之路。

由于当地人口量少,该地区主要依靠印度来的劳动力来建设房屋,仅仅需要几个小时就可以空运过来。阿拉伯和欧洲的公司在海湾地区设有分公司和办事处,并开出高出印度平均薪资水平三四倍作为印度暖通空调工程师的工资,以及免费的公司车辆,汽油比水还便宜,且没有所得税。Voltas,是其中最大的一个暖通空调公司,遭受了严重的人力损失,不得不花时间去培养刚毕业不久的工程师。

在某种程度上说,这些事件竟然是因祸得福,因为印度工程师地技能给阿拉伯雇主留下了如此之深的印象,其中有很多人与Voltas开始做合资生意,这些合作起

初大部分在暖通空调合同上,后来渐渐完善到完整的机电工程,包括电子和管道。为玛丽女王二世而设计的暖通空调

在海湾地区获得的工作经验和与全球各地包括管道、金属板和绝缘材料等设备与配件的国际供货商建立的联系促使Voltas的野心转向世界。

所以,Voltas参与竞标,并在30个国家和三大洲赢得了合同,其中包括为香港机场和在法国港口建造的那个时期最大的豪华客轮“玛丽女王二世”的暖通空调合同。

该公司是总资产达625亿美元的Tata集团的一部分,是国内排名第二的空调品牌。这家公司制造的第一个室内空调是在1954年。它海外的办事处有迪拜、阿布扎比、卡塔尔、巴林、新加坡和香港等国家和地区。

红外数据通信技术外文翻译文献

红外数据通信技术外文翻译文献(文档含中英文对照即英文原文和中文翻译) Infrared Remote Control System Abstract Red outside data correspondence the technique be currently within the scope of world drive extensive usage of a kind of wireless conjunction technique, drive numerous hardware and software platform support. Red outside the transceiver product have cost low, small scaled turn, the baud rate be quick, point to point SSL, be free from electromagnetism thousand Raos

etc. characteristics, can realization information at dissimilarity of the product fast, convenience, safely exchange and transmission, at short distance wireless deliver aspect to own very obvious of advantage. Along with red outside the data deliver a technique more and more mature, the cost descend, red outside the transceiver necessarily will get at the short distance communication realm more extensive of application. The purpose that design this system is transmit customer’s operation information with infrared rays for transmit media, then demodulate original signal with receive circuit. It use coding chip to modulate signal and use decoding chip to demodulate signal. The coding chip is PT2262 and decoding chip is PT2272. Both chips are made in Taiwan. Main work principle is that we provide to input the information for the PT2262 with coding keyboard. The input information was coded by PT2262 and loading to high frequent load wave whose frequent is 38 kHz, then modulate infrared transmit dioxide and radiate space outside when it attian enough power. The receive circuit receive the signal and demodulate original information. The original signal was decoded by PT2272, so as to drive some circuit to accomplish customer’s operation demand. Keywords: Infrared dray;Code;Decoding;LM386;Red outside transceiver 1 Introduction 1.1 research the background and significance Infrared Data Communication Technology is the world wide use of a wireless connection technology, by the many hardware and software platforms supported. Is a data through electrical pulses and infrared optical pulse switch between the wireless data transceiver technology.

暖通专业词汇中英文对照

暖通专业词汇中英文对照 2007年04月10日星期二下午 02:30 暖通专业词汇中英文对照 air conditioning load空调负荷 air distribution气流组织 air handling unit 空气处理单元 air shower 风淋室 air wide pre.drop空气侧压降 aluminum accessories in clean room 洁净室安装铝材 brass stop valve 铜闸阀 canvas connecting termingal 帆布接头 centigrade scale 摄氏温度 chiller accessories水冷机组配件 chiller assembly水冷机组组装 clean bench 净化工作台 clean class 洁净度 clean room 洁净室无尘室 correction factor修正系数 dry coil units 干盘管 district cooling 区域供冷 direct return system直接回水系统 displacement ventilation置换通风 drawing No.图号 elevation立面图 entering air temp进风温度 entering water temp进水温度 fahrenheit scale 华氏温度 fan coil unit 风机盘管 ffu fan filter units 风扇过滤网组 flow velocity 流速 fresh air supply 新风供给 fresh air unit 新风处理机组 ground source heat pump地源热泵 gross weight 毛重 heating ventilating and air conditioning 供热通风与空气调节hepa high efficiency particulate air 高效过滤网 high efficiency particulate air filters高效空气过滤器horizontal series type水平串联式 hot water supply system生活热水系统 humidity 湿度 hydraulic calculation水力计算 isometric drawing轴测图 layout 设计图 leaving air temp 出风温度

金融学专业外文翻译---对简便银行的简单见解

中文3696字 本科毕业论文外文翻译 出处:Infosys Strategic Vision 原文: Insights from Banking Simple By Ashok Vemuri Introduction “A simpler way of banking.We treat with you respect. No extraneous features. No hidden fees.” For the unini tiated, this is the mantra of BankSimple, a Brooklyn-based startup which has positioned itself as a consumer-friendly alternative to traditional banks. BankSimple pushes a message of user experience—sophisticated personal finance analytics, a single “do-it-all” card, superior customer service, and no overdraft fees.Though branchless and primarily online-based, BankSimple is also planning to provide some traditional customer service touches, including phone support and mail-in deposits. Interestingly, BankSimple will also likely not be a bank—at least not in the technical, FDIC sense of the word. Rather, BankSimple’s strategy is to be a front-end focused on the customer experience. The back-end core “bank” component will be FDIC-insured partner banks. Unfettered by years of IT investments and entrenched applications, BankSimple’s team has the freedom to build an innovative, user-friendly online interface, customer service program, and the associated mobile and social bells and whistles that more and more consumers are demanding. One way to look at it is as a wrapper insulating the consumer from the accounting, compliance, and technology challenges that many banks face. Like personal finance sites https://www.wendangku.net/doc/c85169808.html, and Wesabe before it, BankSimple is looking to tap into a perceived gap between what major banks provide and what consumers want. A recent survey by ForeSee Results and Forbes found that consumers view online banking as more satisfying than banking done offline. Though good news for the industry as a whole, the survey also found that the five largest banks in the country scored the lowest in the study. Cheaper and more customer friendly, digital banking is the future—but many consumers are finding it is better done with credit unions, community banks, and (down-the-road) startups like BankSimple. As you read, significant investments are being made by banks to improve their online, mobile, and IVR customer-friendliness. Major banks are embracing these channels, and customer satisfaction will likely improve over time. Even so, startups like Bank- Simple should be viewed as a learning opportunity. Their ideas are disruptive and often highlight pain points that need to be addressed. BankSimple’s first two stated philosophies are a good place to start: “A simpler way of banking” and “We treat you with respect.”

频谱感知技术外文翻译文献

频谱感知技术外文翻译文献 (文档含中英文对照即英文原文和中文翻译) 译文: 一种新的协作频谱感知算法 摘要 该文提出了一种在认知无线网络控制信道带宽受限条件下基于信任度的双门限协同频谱感知算法。首先每个认知用户基于双检测门限独立进行频谱感知,但只有部分可靠的认知用户通过控制信道向认知无线网络基站发送本地感知结果。当所有的用户都不可靠时,选取信任度最高的认知用户发送本地感知结果进行判决。理论分析和仿真表明,同常规能量检测算法相比较,该算法能够在控制信道带宽受限条件下,以较少的网络开销获得更好的频谱感知性能。 关键词:认知无线电;频谱感知;信任度;双门限 1引言 随着无线通信技术的飞速发展,有限的频谱资源与不断增长的无线通信需求的矛盾越来越突出。然而根据现有的固定分配频谱资源策略,绝大多数频谱资源得不到有效利用。据FCC 的调查统计,70%的已分配频谱资源没有得到有效利用]1[。为了提高频谱资源的利用率,认知无线电技术由Joseph Mitola Ⅲ提出并得到了广泛的关注]5[]2[ 。频谱感知技术是认知无线电网络的支撑技术之一。通常它又可以分为

能量检测法、匹配滤波器法和循环平稳特征法[4]。能量检测算法因为应用简单且无需知道任何授权用户信号的先验知识成为研究热点。认知用户在接入授权频带之前,必须首先感知该频带空闲即授权用户没有工作,否则会对授权用户造成干扰。一旦授权用户重新工作,认知用户必须退避,实现在不对授权用户产生干扰的情况下对频谱资源的共享。由于实际信道中的多径和阴影效应,单个认知用户频谱感知的性能并不乐观,针对这个问题D. Cabric 等人提出了协同频谱感知算法[5]-[6]。协同频谱感知算法性能较好,但是当认知用户数量很大的时候,控制信道的带宽将不够用。文献[7]中提出了一种在控制信道带宽受限条件下的基于双检测门限的频谱感知算法,该算法能够以较小的网络开销,获得接近普通单门限频谱检测算法的性能。针对认知无线电频谱感知的需要,本文提出了认知无线电环境下一种基于信任度的双门限协同频谱感知算法。该算法中每个认知用户基于双检测门限独立进行频谱感知,但只有部分可靠的认知用户通过控制信道向认知无线网络基站发射感知报告。当所有的用户都不可靠时,选取信任度最高的认知用户发射感知报告进行判决。本文对该算法进行了性能分析并通过仿真表明,本文方法比较常规能量检测算法,在减小网络开销的同时提高了检测性能。 2系统模型 假设一个认知无线电网络有N 个认知用户和一个认知无线网络基站,如图1 所示。认知无线网络基站负责管理和联系N 个认知用户,在收到认知用户的检测报告后做出最终判决。 图1. 认知无线电网络示意图 频谱感知的实质是一个二元假设问题,即 01 (),,()()()(),n t H x t h t s t n t H ?=??+? (1)

浅谈建筑环境与暖通空调能耗 外文资料翻译

毕业设计(论文)外文资料翻译 学院:建筑工程学院 专业:建筑环境与设备工程 姓名: ***** 学号: ******** 外文出处: Shallow talk the building environment an air condition to can consume with the warm 附件: 1.外文资料翻译译文;2.外文原文。 指导教师评语: 签名: 年月日

浅谈建筑环境与暖通空调能耗 摘要:研究建筑环境,了解暖通空调负荷产生的原因及影响因素,可以更加合理地提出解决问题的方法。 关键词:建筑环境暖通空调能耗 浅谈建筑环境与暖通空调能耗 能源为经济的发展提供了动力,但是由于各种原因,能源的发展往往滞后于经济的发展。近几年,中国的国民生产总值的增长率维持在约10%,但是能源的增长率只有3%~4%。这样的形势要求我们必须节能。建筑能源消耗在社会总能耗中的比例较大,发达国家的建筑用能一般占到全国总能耗的30%~40%;中国采暖区的城镇人口虽然只占全国人口的13.6%,但是采暖用能却占全国总能耗的9.6%。建筑节能是建筑发展的基本趋势,也是当代建筑科学技术的一个新的生长点。现代建筑的必要组成部分暖通空调领域也已经收到这种趋势的影响,暖通空调系统中的节能正在引起暖通空调工作者的注意,并且针对不同的国家、地区的能源特点和不同建筑的采暖、通风、空调要求发展者相关的节能技术。研究建筑环境,了解暖通空调负荷产生的原因及影响因素,可以更加合理地提出解决问题的方法。 暖通空调能耗的组成 为了创造舒适的室内空调环境,必须消耗大量的能源。暖通空调能耗是建筑能耗中的大户,居统计在发达国家中暖通空调能耗占建筑能耗的65%,以建筑能耗占总能耗的356%计算,暖通空调能耗占总能耗的比例竟高达22.75%,由此可见建筑节能工作的重点应该是暖通空调的节能。从暖通空调的能耗组成可以看出:暖通空调系统的能耗主要决定于空调冷、热负荷的确定和空调系统的合理配置,空调系统的布置和空调设备的选择是以空调负荷为依据的。所以暖通空调节能的关键是空调外界负荷和内部负荷的确定,而暖通空调节能工作也应该从这个方面着手,合理布置建筑物的位置,正确选择外墙、门、窗、屋顶的形状及材料等,尽量减少空调负荷。 室内环境的影响 暖通空调的目标是为人们提供舒适的生活和生产室内热环境,主要包括:室内空气温度、空气湿度、气流速度以及人体与周围环境(包括四壁、地面、顶棚等)之间的辐射换热(简称环境热辐射)等。在一般的舒适性空调中,以能够使人体保持平衡而满足

通信工程项目毕业材料外文翻译

用于多跳认知无线电网络的分布式网络编码控制信道 Alfred Asterjadhi等著 1 前言 大多数电磁频谱由政府机构长期指定给公司或机构专门用于区域或国家地区。由于这种资源的静态分配,许可频谱的许多部分在许多时间和/或位置未使用或未被充分利用。另一方面,几种最近的无线技术在诸如IEEE802.11,蓝牙,Zigbee之类的非许可频段中运行,并且在一定程度上对WiMAX进行操作;这些技术已经看到这样的成功和扩散,他们正在访问的频谱- 主要是2.4 GHz ISM频段- 已经过度拥挤。为了为这些现有技术提供更多的频谱资源,并且允许替代和创新技术的潜在开发,最近已经提出允许被许可的设备(称为次要用户)访问那些许可的频谱资源,主要用户未被使用或零星地使用。这种方法通常被称为动态频谱接入(DSA),无线电设备发现和机会性利用未使用或未充分利用的频谱带的能力通常称为认知无线电(CR)技术。 DSA和CR最近都引起了无线通信和网络界的极大关注。通常设想两种主要应用。第一个是认知无线接入(CW A),根据该认知接入点,认知接入点负责识别未使用的许可频谱,并使用它来提供对次用户的接入。第二个应用是我们在这个技术中研究的应用,它是认知自组织网络(CAN),也就是使用 用于二级用户本身之间通信的无许可频谱,用于诸如点对点内容分发,环境监控,安全性等目的,灾难恢复情景通信,军事通信等等。 设计CAN系统比CW A有更多困难,主要有两个原因。第一是识别未使用的频谱。在CW A中,接入点的作用是连接到互联网,因此可以使用简单的策略来推断频谱可用性,例如查询频谱调节器在其地理位置的频谱可用性或直接与主用户协商频谱可用性或一些中间频谱经纪人另一方面,在CAN中,与频谱调节器或主要用户的缺乏直接通信需要二级用户能够使用检测技术自己识别未使用的频谱。第二个困难是辅助用户协调媒体访问目的。在CW A中存在接入点和通常所有二级用户直接与之通信(即,网络是单跳)的事实使得直接使用集中式媒体接入控制(MAC)解决方案,如时分多址(TDMA)或正交频分多址(OFDMA)。相反,预计CAN将跨越多跳,缺少集中控制器;而对于传统的单通道多跳自组织网络而言,这个问题的几个解决方案是已知的,因为假设我们处理允许设备访问的具有成

制冷行业中英文术语对照 2019.8.22

空调、制冷词汇中英文对照表 1 主题内容与适用范围 本标准适用于本公司的所有空调产品及技术文件所使用的名词、术语。 本标准提供一套标准的,统一的制冷、空调名词,术语的中英文对照表,用作产品说明书,图样及有关技术文件的用词规范。 2 词汇中英文对照表 2.1 通用词汇部分 制冷refrigeration 空气调节air conditioning 环境条件environmental conditions 标准工况standard test condition 空调工况air conditioning condition 制冷量refrigerating capacity(cooling capacity) 标准制冷量standard cooling capacity 能效比energy efficiency ratio(EER) 性能系数coefficient of performance(COP) 温度temperature 湿度humidity 压力pressure 干空气dry air 湿空气moist air 大气压力atmospheric pressure 饱和空气saturated air 干球温度dry bulb temperature 湿球温度wet bulb temperature 露点温度dew point temperature 机器露点apparatus dew point 绝对湿度absolute humidity 相对湿度relative humidity 含湿量specific humidity 空气循环air circulation 制冷系统refrigeration system 制冷循环refrigeration cycle(cooling cycle) 制热循环heating cycle 蒸发evaporation 冷凝condensation 过冷subcooling 过热superheat 过程process 压缩compression 膨胀expansion

金融学专业外文翻译(中英对照、翻译专业修改好了的)

论文题目:关于巴塞尔II:新巴塞尔资本协议的影响 学院名称:财经学院专业班级:金融0814班学生姓名:王庆贺 外文题目:Dealing with Basel II: the impact of the New Basel Capital Accord 出处:Balance Sheet,2003,Vol.11(No.4) 作者:Thomas Garside and Jens Bech 译文: 关于巴塞尔II:新巴塞尔资本协议的影响 托马斯·加赛德和杰尼斯·伯克 摘要:国际监管机构在2003年完成新资本协议,银行决定在2006年底执行这个协议。巴塞尔协议是对全球银行业改革的监管。在本文中,我们回顾新巴塞尔资本协议内容以及一些我们所期望对欧洲银行业发生的重要影响。正如在第一届巴塞尔协议修正案(Basel I)中,我们得出结论,新巴塞尔协议不仅对持有资本额的数量做了规定,还对银行业的战略格局进行展望。 关键词:银行,流动性,监管,风险管理 新巴塞尔资本协议的新规则 巴塞尔委员会虽然只是公布了三分之一,但这很可能是协商的最后新资本协议(Basel II)文件。这项建议如获通过,将会深刻地改变银行的偿付能力的方式,监管机构监管银行风险管理实施过程和银行必须对市场参与者公布的风险信息量,经过讨论会,巴塞尔委员会预计将在2003年底发布的新资本协议的最后草案。 目前的巴塞尔资本协议(Basel I)对达到加强国际金融体系的稳定的既定目标已经有了显著成效,通过在不同国家持续应用本协议的同时,增加了资本水平,创造了一个更公平的竞争领域。总的来说,目前的全球一级资本的平均水平从1993年的约6%升至8%,此外,巴塞尔资本协议已经应用于100多个国家,远远超过最初的预期。 尽管实现其最初目标的成效很明显,很显然,对于巴塞尔我有一些意想不到的不

无线射频识别技术外文翻译参考文献

无线射频识别技术外文翻译参考文献(文档含中英文对照即英文原文和中文翻译) 翻译: 当前无线射频识别技术应用略述 摘要 无线射频识别技术可以自动识别多目标并以非接触式方式移动目标。越来越多的零售商、银行、交通管理系统、展览及物流供应商将这项新技术应

用于他们的产品和服务。因此,这给RFID技术的研究带来了机遇和挑战。本文简单介绍了RFID系统的组成、原理及RFID技术的特点。本文比较了RFID 与传统条码,然后提供了一个简短的关于目前RFID应用情况的调查报告。 关键词:无线射频识别技术应用物流

一、简 介 无线射频识别(RFID )是一种识别技术。与RFID 技术的前身——条码技术相比,RFID 技术具有很多的优点。但由于其成本高,RFID 技术至今未能广泛应用到各行各业。RFID 技术因其无需视线扫描而具有无可比拟的先进性,它能够降低劳动力水平,提高知名度并改善库存管理。 RFID 技术的普及提供了一项人或物体定位及追踪的解决方案。RFID 定位与跟踪系统根据独特的识别标签、阅读器与物体标签间射频通信的信号强度确定物体的空间位置,主要适用于室内,而GPS 系统是不适合应用于室内的。 RFID 技术是一项基于“无线电频率”的非接触式的自动识别技术,自动识别静态或动态的人和对象。 RFID 标签是一个特殊的微芯片,植入商品中,可以跟踪和管理物理对象,是物流管理信息化和跟踪信息化的重要手段。 RFID 的系统组成部分包括: (1)标签(应答器):对象植入待确定。 (2)阅读器:可以读或读/写,按结构和技术。正如图1-1,RFID 的工作原理 图1-1 RFID 的工作原理 与计算机通讯 阅读器 电磁波(操作指 令和新的数据) 标签 发出的ID 代码和数据

外文翻译--浅谈建筑环境与暖通空调能耗

中文2300字 Shallow talk the building environment an air condition to can consume with the warm Summary: The research constructs environment, understanding a warm an air condition to carry output reason and influencing factor, can be more and reasonably put forward solve problem of method. Keyword: Constructing a warm of environment an air condition can consume Shallow talk the building environment an air condition to can consume with the warm The energy provided motive for the development of the economy, but because of various reason, the development of the energy is a usually behind in economy of development. In the last few years, the growth rate maintenance of citizen's total output value of China are in about 10%, but the growth rate of the energy only have 3% ~s 4%.Such situation's requesting us has to economize on energy. The comparison that constructs the energy depletion in the society always the ability consume compares greatly, the building of the flourishing nations' use can have to the whole country generally and always can consume of 30% ~s 40%;China adopts the town population of the warm area although only 13.6% that have national population, adopt warm use an ability but have a whole country and always can consume of 9.6%.Construct the economy energy is the basic trend of the building development, is also a new growth of[with] the contemporary building science technique to order. The necessity of the modern building constitutes a part of warm, the air condition realm has already received the influence of this kind of trend as well, warm the economy energy within air condition system is cause a warm the attention of the air condition worker, and aims at different of the adopt of energy characteristics and the dissimilarity building of the nation, region is warm, well ventilated, the air condition request develop a related economy energy technique .The research constructs environment, understanding a warm an air condition to carry output reason and

5G无线通信网络中英文对照外文翻译文献

5G无线通信网络中英文对照外文翻译文献(文档含英文原文和中文翻译)

翻译: 5G无线通信网络的蜂窝结构和关键技术 摘要 第四代无线通信系统已经或者即将在许多国家部署。然而,随着无线移动设备和服务的激增,仍然有一些挑战尤其是4G所不能容纳的,例如像频谱危机和高能量消耗。无线系统设计师们面临着满足新型无线应用对高数据速率和机动性要求的持续性增长的需求,因此他们已经开始研究被期望于2020年后就能部署的第五代无线系统。在这篇文章里面,我们提出一个有内门和外门情景之分的潜在的蜂窝结构,并且讨论了多种可行性关于5G无线通信系统的技术,比如大量的MIMO技术,节能通信,认知的广播网络和可见光通信。面临潜在技术的未知挑战也被讨论了。 介绍 信息通信技术(ICT)创新合理的使用对世界经济的提高变得越来越重要。无线通信网络在全球ICT战略中也许是最挑剔的元素,并且支撑着很多其他的行业,它是世界上成长最快最有活力的行业之一。欧洲移动天文台(EMO)报道2010年移动通信业总计税收1740亿欧元,从而超过了航空航天业和制药业。无线技术的发展大大提高了人们在商业运作和社交功能方面通信和生活的能力无线移动通信的显著成就表现在技术创新的快速步伐。从1991年二代移动通信系统(2G)的初次登场到2001年三代系统(3G)的首次起飞,无线移动网络已经实现了从一个纯粹的技术系统到一个能承载大量多媒体内容网络的转变。4G无线系统被设计出来用来满足IMT-A技术使用IP面向所有服务的需求。在4G系统中,先进的无线接口被用于正交频分复用技术(OFDM),多输入多输出系统(MIMO)和链路自适应技术。4G无线网络可支持数据速率可达1Gb/s的低流度,比如流动局域无线访问,还有速率高达100M/s的高流速,例如像移动访问。LTE系统和它的延伸系统LTE-A,作为实用的4G系统已经在全球于最近期或不久的将来部署。 然而,每年仍然有戏剧性增长数量的用户支持移动宽频带系统。越来越多的

暖通专业术语中英文对照词汇表

1. 热力学thermodynamics 2. 热源heat source 3. 热力学平衡状态thermodynamic equilibrium state 4. 稳态steady state 5. 非稳态unsteady state 6. 可逆过程reversible process 7. 不可逆过程irreversible process 8. 热力学第一定律first law of thermodynamics 9. 热力学第二定律second law of thermodynamics 10. 热力学第三定律third law of thermodynamics 11. 内能internal energy 12. 焓enthalpy 13. 熵entropy 14. 热量heat 15. 理想气体ideal gas 16. 相变change of phase 17. 汽化vaporization 18. 蒸发evaporation 19. 沸腾boiling 20. 沸点boiling point 21. 凝结condensation 22. 饱和状态saturation state

23. 饱和温度saturation temperature 24. 饱和压力saturation pressure 25. 饱和液体saturation liquid 26. 饱和蒸汽saturation vapor 27. 过饱和supersaturation 28. 湿蒸汽wet vapor 29. 过热superheat 30. 过热蒸汽superheated vapor 31. 过热度degree of superheat 32. 过冷subcooling 33. 过冷液体subcooled liquid 34. 气-液混合物liquid-vapor mixture 35. 干度quality 36. 冷凝点condensation point 37. 冷凝液condensate 38. 共沸混合物azeotropic mixture 39. 共沸性azeotropy 40. 共沸点azeotropic point 41. 凝固solidification 42. 熔化fusion 43. 熔点melting point 44. 升华sublimation

金融学毕业论文外文翻译中英文全

Improve the concept of financial supervision in rural areas1 Xun Qian Farmers in China's vast population, has some large-scale production of the farmers, but also survival-oriented farmers, huge differences between the financial needs of rural finance intermediation makes complex, together with agriculture itself is the profit low, natural and market risks high risk decision to weak agricultural industry characteristics, resulting in the cost of rural financial transactions is far higher than the city, also decided to organize the rural financial system in terms of operation or in the market has its own special characteristics. 20 years of financial reform, financial development while the Chinese city made impressive achievements, but the rural finance is the entire financial system is still the weakest link. Insufficient supply of rural finance, competition is not sufficient, farmers and agricultural enterprises in getting loans and other issues is also very prominent, backward rural financial system can no longer effectively support the development of modern agriculture or the transformation of traditional agriculture and the building of new socialist countryside, which to improve the rural financial supervision new topic. China's rural financial regulatory problems (A) the formation of China's financial regulatory system had "a line three commission " (People's Bank, the Securities Regulatory Commission, Insurance Regulatory Commission and the Banking Regulatory Commission) financial regulatory structure. Bank These stringent requirements, different management and diversification of monitoring has its positive role, but it also had some negative effects. First, inefficient supervision, supervision of internal consumption of high costs, limited financial industry business development and innovation space. Second, the regulatory agencies, regulatory bodies and the information asymmetry between central banks, banking, securities, and insurance mechanisms of coordination between regulatory bodies are not perfect. Information between central banks and regulatory agencies is difficult to share, is difficult to create effective monitoring force. Basically between the various 1American Journal of Agricultural Economics,2009.

单片机技术发展与应用中英文对照外文翻译文献

(文档含英文原文和中文翻译) 中英文对照外文翻译 单片机技术的发展与应用 从无线电世界到单片机世界现代计算机技术的产业革命,将世界经济从资本经济带入到知识经济时代。在电子世界领域,从 20 世纪中的无线电时代也进入到 21 世纪以计算机技术为中心的智能化现代电子系统时代。现代电子系统的基本核心是嵌入式计算机系统(简称嵌入式系统),而单片机是最典型、最广泛、最普及的嵌入式系统。 一、无线电世界造就了几代英才。在 20 世纪五六十年代,最具代表的先进的电子技术就是无线电技术,包括无线电广播,收音,无线通信(电报),业余无线电台,无

线电定位,导航等遥测、遥控、遥信技术。早期就是这些电子技术带领着许多青少年步入了奇妙的电子世界,无线电技术展示了当时科技生活美妙的前景。电子科学开始形成了一门新兴学科。无线电电子学,无线通信开始了电子世界的历程。无线电技术不仅成为了当时先进科学技术的代表,而且从普及到专业的科学领域,吸引了广大青少年,并使他们从中找到了无穷的乐趣。从床头的矿石收音机到超外差收音机;从无线电发报到业余无线电台;从电话,电铃到无线电操纵模型。无线电技术成为当时青少年科普、科技教育最普及,最广泛的内容。至今,许多老一辈的工程师、专家、教授当年都是无线电爱好者。无线电技术的无穷乐趣,无线电技术的全面训练,从电子学基本原理,电子元器件基础到无线电遥控、遥测、遥信电子系统制作,培养出了几代科技英才。 二、从无线电时代到电子技术普及时代。早期的无线电技术推动了电子技术的发展,其中最主要的是真空管电子技术向半导体电子技术的发展。半导体电子技术使有源器件实现了微小型化和低成本,使无线电技术有了更大普及和创新,并大大地开阔了许多非无线电的控制领域。半导体技术发展导致集成电路器件的产生,形成了近代电子技术的飞跃,电子技术从分立器件时代走进了电路集成时代。电子设计工程师不再用分立的电子元器件设计电路单元,而直接选择集成化的电路单元器件构成系统。他们从电路单元设计中解放出来,致力于系统设计,大大地解放了科技生产力,促进了电子系统更大范围的普及。半导体集成电路首先在基本数字逻辑电路上取得突破。大量数字逻辑电路,如门电路,计数器,定时器,移位寄存器以及模拟开关,比较器等,为电子数字控制提供了极佳的条件,使传统的机械控制转向电子控制。功率电子器件以及传感技术的发展使原先以无线电为中心的电子技术开始转向工程领域中的机械系统的数字控制,检测领域中的信息采集,运动机械对象的电气伺服驱动控制。半导体及其集成电路技术将我们带入了一个电子技术普及时代,无线电技术成为电子技术应用领域的一个部分。进20世纪70年代,大规模集成电路出现,促进了常规的电子电路单元的专用电子系统发展。许多专用电子系统单元变成了集成化器件,如收音机,电子钟,计算器等,在这些领域的电子工程师从电路系统的精心设计,调试转变为器件选择,外围器件适配工作。电子技术发展了,电子产品丰富了,电子工程师的难度减少了,但与此同时,无线电技术,电子技术的魅力却削弱了。半导体集成电路的发展使经典电子系统日趋完善,留在大规模集成电路以外的电子技术日益减少,电子技术没有了往昔无线电时代的无穷乐趣和全面的工程训练。 三、从经典电子技术时代到现代电子技术时代进入 20 世纪 80 年代,世界经济

相关文档
相关文档 最新文档