该受的
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to reduce the impact of carrier frequency offset in ofdm system,this thesis designs a new carrier frequency offset estimation scheme for ofdm system.the carrier frequency offset estimation includes acquisition and tracking.we adopt variable step size adaptive algorithm.the acquisition range of the proposed algorithm is as large as one half of the overall signal bandwidth.through this method we can not only avoid the feedback by using forward error correction,but also reduce the times of complex multiplication in order to reduce the power consumption of the system.this algorithm not only has low complexity and fast convergence nut also can improve the demodulation performance of ofdm system.computer simulation illustrates the superior performance of the proposed algorithm with regard to estimation accuracy in both awgn channel and multi—path channel.
摘 要:为了减小正交频分复用系统受频率偏差的影响,在ofdm系统中设计了一种新的载波频偏估计算法。频偏估计包括跟踪和捕获两个阶段,文中采用变步长自适应算法来进行跟踪,这个跟踪算法的捕捉范围是整个信号带宽的一半。通过此方法,不但可以利用前向纠错的方式来避免反馈,而且可以缩减复数乘法的次数以降低计算复杂度和系统功耗。该方法运算复杂度低,并具有较好的收敛性,能改善odfm的解调性能。从计算机的仿真效果可以看出无论是在awgn信道上还是在多径信道上都表现出了卓越的性能。
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With the electrical connections at the top and bottom side of the wafer-level IC packaging Lead-frame structure and composition of the surface-mount semiconductor package structure Multi-layer printed circuit board Antifuse and its formation method and with the anti-fuse non-volatile memory device unit cell Tandem electric signal processing circuit and electronic device Light-emitting diode packaging structure and encapsulation method Electronic Packaging Structure Flip-chip high-speed optoelectronic components and structure Pairs of piezoelectric friction side by side to promote the three-step device and scanning probe microscope Light-emitting diode and its manufacturing method, the production base of light-emitting diode method Three or four parallel advance of stepping piezoelectric device and scanning probe microscope lens body Silicon substrate and its manufacturing method Semiconductor device and voltage-divider A polysilicon layer and the microcrystalline silicon layer of the double-substrate active layer structure, methods and devices The edge of the thickness of silicon controlled Of a lateral semiconductor devices and high-voltage devices With a vertical-channel transistors semiconductor device Of a memory array and for the manufacture of a memory array method Read-only memory cell array structure Active-matrix substrate and display device High-voltage semiconductor integrated circuit devices, dielectric isolated type semiconductor device Image sensing devices Lens module and its manufacturing methods Solid-state imaging device and camera Injection angle for the trench isolation Organic Light-Emitting Display Device Organic light-emitting display device Bipolar transistor structure of the surface passivation Double-triggered silicon-controlled rectifier HFET Metal-oxide semiconductor transistors Self-aligned trench accumulation mode field effect transistor structure Thin-film transistors and Display Devices TFT Lead Diode Low-frequency, low noise, low-flashing diode Used for thin-film solar cells trap light structure Transparent sun solar cells Quaternary semiconductor heterojunction photovoltaic cells heat Si nano-pillar array heterojunction thin-film solar cells GaN-based micro-composite solar cells isotope Optical sensor Semiconductor by optical components Imaging Detector Transparent conductive oxide coating Silicon-based high-performance dual-junction solar cells Thin-film solar cells Alien LED Devices
非专业,不在行,求高手帮忙。谢谢!具有顶部及底部侧电连接的晶片级集成电路封装导线架结构及其构成的表面黏着型半导体封装结构多层印刷电路板反熔丝及其形成方法和具有该反熔丝的非易失性存储器件的单位单元串联用电式信号处理电路及电子装置发光二极管的封装结构及其封装方法电子封装结构高速光电组件及其芯片倒装结构双压电体并排推动的三摩擦力步进器与扫描探针显微镜发光二极管及其制作方法、发光二极管的底座的制作方法三或四压电体并行推进的步进器及其扫描探针显微镜镜体硅衬底及其制造方法半导体装置与分压电路具多晶硅层及微晶硅层的双底材主动层结构、方法及装置硅晶片的受控边缘厚度一种半导体横向器件和高压器件具有垂直沟道晶体管的半导体器件一种记忆体阵列及其用于制造一记忆体阵列的方法只读内存单元阵列结构有源矩阵基板和显示装置高耐压半导体集成电路装置、电介质分离型半导体装置图像感测装置透镜模块及其制造方法固态成像装置和照相机用于沟道隔离的斜角注入有机电致发光显示装置有机发光显示装置双极晶体管的表面钝化结构双触发型可控硅整流器异质结场效应晶体管金属氧化物半导体晶体管自对准沟槽累加模式场效应晶体管结构薄膜晶体管及显示器件薄膜晶体管无铅二极管低频、低噪音、低闪烁的二极管用于薄膜太阳电池的陷光结构透明遮阳太阳能电池片四元半导体的异质结热光伏电池硅基纳米柱阵列异质结薄膜太阳能电池氮化镓太阳能同位素复合型微电池光学传感器半导体受光元件成像探测器透明导电氧化物涂层硅基高效双结太阳能电池薄膜太阳能电池异形LED器件
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Although, therefore, it was decreed at the sacred general council recently held at Rome [35 ] that the teaching of John Wyclif, of cursed memory, should be condemned and the books of his containing this teaching should be burnt as heretical; although his teaching was in fact condemned and his books burnt as containing false and dangerous doctrine; and although a decree of this kind was approved by the authority of this present sacred council [36 ] ; nevertheless a certain John Hus , here present in person at this sacred council, who is a disciple not of Christ but rather of the heresiarch John Wyclif, boldly and rashly contravening the condemnation and the decree after their enactment, has taught, asserted and preached many errors and heresies of John Wyclif which have been condemned both by God's church and by other reverend fathers in Christ, lord archbishops and bishops of various kingdoms, and masters in theology at many places of study.
虽然,因此,这是命令,在神圣的总理事会最近在罗马举行的〔 35 〕认为,教学的约翰wyclif ,受诅咒的记忆,应该受到谴责和书籍,他含有这种教学应被烧为异端,虽然他的教学应该是在谴责和他的书被烧了,因为载有虚假和危险的教义虽然一项法令,这一类被当局认可的,这本神圣会〔 36 〕,但一定约翰溶血尿毒综合症,在这里亲自出席,在这片神圣的会一位弟子没有基督的,而是该heresiarch约翰wyclif ,大胆贸然违反谴责和法令后,他们制定了教,断言和鼓吹的许多错误和异端邪说的约翰wyclif已谴责了这两个上帝的教会和其他牧师的父亲在基督里,主大主教和主教的各种演义,主人在神学上,许多地方的研究。
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The following types of licensing practices have been found to be contrary to US antitrust law: Requiring a licensee to purchase separate unpatented products as a condition of obtaining the license for a patented product; Requiring mandatory package licensing; Forming a cartel through exclusive cross-licensing; Using a patent, trademark or trade secret as the basis for an agreement that restrains where, how or to whom a patented product is disposed of in the US after the licenser or licensee has sold the product to an independent purchaser; Agreeing in relation to a license that no further licenses will be granted to a third party without the licensee's consent; Requiring a licensee to adhere to any specified or minimum price for the licensee's sale of the licensed products; Insisting as a condition of the license that the licensee pay royalties in an amount not reasonably related to the licensee's sale of products covered by the licensed rights; Attempting to enforce a patent license or collect a royalty beyond the term of the patent (the same reasoning could apply to attempts to enforce or collect royalties on a license based on know-how that has entered the public domain); and Requiring a licensee to agree in advance to grant back to the licenser title or an exclusive license on any new patents or trade secrets related to the licensed technology rights that the licensee may obtain or develop.
下列许可行为被认为违反了美国反垄断法:●要求被许可方购买另外非专利产品作为获得某一专利产品许可的条件;以强制性一揽子方式提供许可;通过独占交叉许可组建一个企业联盟;利用一项专利,商标或商业秘密作为协议的基础,在许可方或被许可方将某一专利产品卖给一位独立买家后,限制该产品在美国的处理地点,方式和交易对象;规定某一许可在未获被许可方同意的情况下,不再向任何第三方发放许可;要求被许可方在销售其获得许可的产品时遵守特定的或最低价格;对于销售受许可权利保护的产品,要求被许可方支付不合理的特许权使用费,并以此作为获得许可的条件;试图超出专利范围强加一项专利许可或对其收取特许权使用费(同一理由可适用于试图根据已进入公共领域的技术秘密强加一项专利许可或对其收取特许权使用费);以及对于被许可方可能获得或拥有的与被许可技术权利相关的任何新专利或商业秘密,要求被许可方事先同意向许可方回授有关权利或专属许可。
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The universal powder box includes one box with powder bin and cover, one stirrer inside the powder bin, one powder feeding roller in the outlet of the powder bin, one developing roller contacting with the powder feeding roller and one locking device for the powder box to be set in and taken out from the sensitive drum. The cover has one upper planar surface, and after being installed, the plane is located below one corresponding raised edge of the printer. In the roller end gear combination outside one side wall of the box, there are two with driving force driving position.
包括一个带有粉仓的盒体和盖,位于粉仓内的搅拌装置,一个位于粉仓出口处的送粉辊、一个与送粉辊接触的显影辊,及使粉盒能顺利置入或取出感光鼓盒的锁放装置,盖的上表面基本是一个平面,装机后该平面位于打印机对应盖下表面凸起的下缘之下,在盒体一个侧壁外的各辊端齿轮组中,有两个带有动力受口的驱动位。
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Heng Bo supplies seamless pipe, senior market analyst, said: At present the majority of iron inside the steel-making pig iron inventories not try for the impact of the demand by the steel mill, a lot of iron re-turn to the production of pig iron for steel-making, according to Iron Works to reflect , due to increased market demand for raw materials and coke prices up, market confidence has been restored, but the production of iron cast iron is still no intention to resume, the market demand will soar to a height of what the market is not expected to unity, on the current situation, the prudent operation of the steel-making pig iron is still the main way to run.
恒博物资的资深无缝管市场分析师表示:目前多数铁厂内炼钢生铁库存量不大,受钢厂需求拉升影响,很多铁厂再度转向对炼钢生铁的生产,据铁厂人士反映,由于市场需求加大和焦炭等原料价格的上行,市场信心有所恢复,但停产的铁厂暂时还没有恢复生铁的打算,市场需求会升到一个什么样的高度,市场预期并不统一,就目前的形势来看,谨慎操作依然是该炼钢生铁运行的主要方式。
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A mathematic model of cord tension of any lamina is built up by calculating the stiffness model under inflation and static loading case of tire also.
该模型表明帘线受力特征与轮胎加载条件、轮胎断面的形状和尺寸、帘线的规格、帘线的铺设角和排列间距、带束层的结构形式、带束层的宽度等诸多因素的耦合作用密切关联。
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Based on the elastic theory of large deflection and by taking into account the variation of the axial force and its effects on bending deformation of the drillstring in vertical section ,the vibration of the drillstring induced by fluctuating weight on bit is described by a parametrically excited system.
基于弹性大变形理论,考虑到轴力沿钻柱轴线的变化及其对钻柱弯曲变形的影响等因素,将受自重作用的铅垂井段钻柱在波动钻压激励下的振动转化为一个参数激励系统,用 Galerkin方法首次得到了描述此系统的 Mathieu方程,并通过将方程的解展成富里叶级数的方法,得到了该振动系统的动力分岔值曲线及其所包围的动力不稳定区。
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The concept traces its roots back to early Roman law, in which the doctrine of public trust developed around the idea that certain common properties, such as the air, seashores, and rivers, were held in trust by the government for the free and unimpeded use of the public.47 This doctrine was subsequently applied in England to give ownership of public lands to the king but required that his subjects be given access to waterways for such purposes as fishing and trade.
这一理念的本源可以追溯到早期的罗马法,当时公信原则是围绕一种观点产生的。这种观点认为一定的公共财产如空气、海岸和河流等都应该由政府所掌握,并由公众无偿的、不受妨碍地加以利用47。该原则随后被英国应用于确认英王对公共土地的所有权上,但他同时又要求其宗旨应是以水资源利用为目的,如渔业和贸易。
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However, the UNEP-AIT report said that Cambodia's great central lake Tonle Sap , the nursery of the lower Mekong's fish stocks, and Vietnam's Mekong Delta, its rice bowl, were particularly at risk from changes to the river's unique cycle of flood and drought.
联合国环境计划和亚洲理工学院的报告指出,柬埔寨的大湖洞里萨湖,湄公河下游渔场的鱼量、以及越南的&饭碗&湄公河三角洲都会因为该河特有的季节性洪水泛滥和干旱的改变而大受影响。
- 推荐网络例句
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Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.
在对危险的南部地区访问时,他斥责什叶派民兵领导人对中央集权的挑衅行为。
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In fact,I've got him on the satellite mobile right now.
实际上 我们已接通卫星可视电话了
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The enrich the peopling of Deng Xiaoping of century great person thought, it is the main component in system of theory of Deng Xiaoping economy, it is a when our country economy builds basic task important facet.
世纪伟人邓小平的富民思想,是邓小平经济理论体系中的重要组成部分,是我国经济建设根本任务的一个重要方面。