摘要：Alkali recovery aiming at recovering NaOH is the best available technology in China's pulp and paper industry;an alkali recovery boiler is a popular one among all alkali recovery units. For the purpose of designing the most reasonable tube-panel of an evaporator in a 1500 t/d alkali recovery boiler, a total of 8 kinds of cases are put forward for finite element analysis. The modeling, meshing and calculation are carried out for each case. The stress values and their distribution rules are revealed in this paper. The slotting size for the water tubes panel is analyzed by using the optimum design module of ANSYS. After all cases are compared with each other, the optimal one is developed and exemplified in conclusion.

摘要：This study involves the applications of different numerical techniques in a more general way to the design of a simulator for an enhanced oil recovery process with surfactant assisted water flooding. The data from a hypothetical oil well and a Nigerian oil well were used for the validation of the simulator. The process is represented by a system of nonlinear partial differential equations: the continuity equation for the transport of the components and Darcy’s equation for the phase flow. The orthogonal collocation, finite difference and coherence theory techniques were used in solving the equations that characterized the multidimensional, multiphase and multicomponent flow problem. Matlab computer programs were used for the numerical solution of the model equ- ations. The predicted simulator, obtained from the resulting numerical exercise confers uncondi- tional stability and more insight into the physical reservoir description. The results of the ortho- gonal collocation solution were compared with those of finite difference and coherence solutions. The results indicate that the concentration of surfactants for orthogonal collocation show more features than the predictions of the coherence solution and the finite difference, offering more opportunities for further understanding of the physical nature of the complex problem. We have found out that the partition of the three components between the two-phases determines other physical property data and hence the oil recovery. The oil recovery for the Nigerian oil reservoir is higher than the recovery predicted for the hypothetical crude. The displacement mechanism for the multicomponent and multiphase system is stable in the Nigerian oil reservoir due to the mod- erate value of the oil/water viscosity instead of the hypothetical reservoir with high value of oil/water ratio.

摘要：成立迄今只有六年的英华达公司，以惊人的成长速度跻身高科技大厂之列。2005年更创下营收突破千亿新台币大关的里程碑，英华达坚持的用户导向品牌营销（COBM）与高效整合设计代工（IDOM）双经营模式，更成功地反应在OKWAP自有品牌手机与iPod代工业务，形成互补互利的典范。

摘要：重力反演是应用地球物理中一个经典的方法,可以获取地下空间的密度分布特征。本文研究了一种新的三维重力反演方法,以压缩感知中的稀疏恢复方法为基本原理。建立以零范数为约束的目标函数,采用近似零范数求解方法对目标函数进行迭代求解。以重力正演模型为基础进行反演方法研究,建立包含深度加权函数的零范数的目标函数,采用相应的最优化数学方法进行求解,得到稀疏的反演结果。同时,为了得到具有实际地质意义的反演结果,采用惩罚函数将反演密度值约束在具有实际地球物理和地质意义范围内。采用本文提出的反演方法得到的反演目标异常源具有较为清晰的边界、深度信息和剩余密度分布信息。本文利用理论模型实验来验证反演方法效果,并将得到的反演结果与设计的理论模型对比分析说明三维反演方法的有效性和可靠性。为了进一步说明本文采用的反演方法的可靠性,将其应用到美国德克萨斯州采集的实际重力数据反演,并将反演结果与前人研究结果和该地区的测井资料进行对比分析,盐丘的深度为4.2km与测井得到深度4.4km基本上是一致的,说明研究的反演方法具有实际应用价值。

摘要：采用标准0.18 μm CMOS工艺,设计了一种高锁定范围的半盲型过采样时钟数据恢复电路.该时钟数据恢复电路（Clock and Data recovery,CDR）主要由鉴频器（Frequency detector,FD）、多路平行过采样电路、10位数模转换器（Digital To Analog Converter,DAC）、低通滤波器（Low Pass Filter,LPF）、多相位压控振荡器（Voltage Controlled Oscillator,VCO）等构成.该CDR电路采用模数混合设计方法,并提出了基于双环结构实现对采样时钟先粗调后微调的方法,并且在细调过程中提出了加权调相的方法缩短采样时间.仿真结果表明,该CDR电路能恢复1.25～4.00 Gbps之间的伪随机数据电路,锁定时间为2.1 μs,VCO输出的抖动为47.12 ps.

摘要：1过采样法时钟数据恢复原理目前基于FPGA的全数字CDR（Clock and Data recovery,时钟数据恢复）多采用数字化过采样法,有同频多相时钟采样和数据延迟链采样两种具体的实现方式。

摘要：“recovery”是指寻回一度失去,退化或被遗忘的事物,重新赋予它们新的活力。这个词在当代风景园林的讨论中多次为人们引用,还出现在詹姆斯·可纳编辑出版的散文集《重释景观》（Recovering Landscape）的书名中。詹姆斯希望通过研究景观的复兴,即景观在这么多年被人们忽视之后在文化领域的再现,以及人们对景观的不断认识,重新思考作为一种理论和人造艺术的本质所在。这种说法的核心肯定了景观是重要的文化实践,它作为一种具有独创性的媒介,参与当前建成环境和人们设想的环境之间的互动。

摘要：2011年9月10日,一对专门设计用来对月球进行引力测量的卫星,GRAIL（Gravity recovery And Interior Laboratory）,从美国卡纳维拉尔角空军基地出发,搭乘＂德尔它＂2型火箭踏上前往月球的3个月的旅程。美国航宇局表示,这对卫星的任务是以前所未有的精度测量月球各处的引力强度,这些测量资料结合以往阿波罗计划月震探测的数据,将有望加深人类对月球地质和内部构造的了解。

摘要：利用高炉煤气余压发电，是钢铁企业一项有效的能源回收措施，高炉煤气余压透平发电装置（Top Gas pressure recovery Turbine简称TRT）是国际、国内公认的钢铁企业重大能量回收装置。它是利用高炉煤气所具有的压力能、热能，把煤气导入透平机膨胀机，使压力能、热能转化为机械能，驱动发电机发电的一种装置。

摘要：A Thousand Splendid Suns is a classic work of Afghan American writer Khaled Hosseini after his first novel The Kite Runner,which tells the tragic lives of two Afghan women-Mariam and *** it’s an incredible story about family,friendship,faith and salvation through *** the same time,this essay based on the theory of trauma interprets the lives of Mariam and Laila,and thus explains their external manifestations of trauma and trauma recovery.