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提到大卫·贝克汉姆,可能大多数人首先想到的是他头顶十年的耀眼巨星光环。身为万人迷,贝克汉姆始终是媒体追逐的焦点,从来不缺少目光和话题,但在看过他代表英格兰队参加的第100场比赛后,我重新认识了一个勤奋而执着的贝克汉姆。岁月在贝克汉姆俊朗的面庞上留下了痕迹,十年前的阳光少年如今已成为内敛的成熟男人。回顾贝克汉姆十几年来的足球经历:拥有三冠王的荣耀,他不骄不躁;离开红魔,他依然潇洒;为了西甲冠军,他默默努力;离开银河战舰,他还是万众瞩目的万人迷。一场普普通通的 相似文献
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A low-power three-stage amplifier for driving large capacitive load is proposed. The feedback path formed by the active-feedback Miller capacitor leads to a high frequency complex-pole but a high Q-value, which significantly deteriorates the stability of the amplifier. The serial RC stage introduced as the second stage output load can optimize the resistor Rz and the capacitor Cz under fixed power and small compensation capacitor Ca, which brings about a suitable Q-value of the complex-pole and the gain-bandwidth product extension of the amplifier. The amplifiers were designed and implemented in a standard 65 nm CMOS process with capacitive loads of 500 p F and 2 n F, respectively. The post-layout simulation results show that the amplifier driving the 500 p F capacitive load can achieve a gain of 113 d B, a phase margin of 50.6° and a gain-bandwidth product of 5.22 MHz while consuming 24 μW from a 1.2 V supply. For the 2 n F capacitive load, the amplifier has a gain of 102 d B, a phase margin of 52.8°, a gain-bandwidth product of 4.41 MHz and a power of 43 μW. The total compensation capacitors are equal to 1.13 p F and 1.03 p F. The better figures-of-merits are 108 750 and 205 113(MHz×p F/m W). The layout areas are 0.064 mm×0.026 mm and 0.063 mm×0.027 mm. Compared with the CFCC scheme, the gainbandwidth product is extended by 1.6 times at CL=500 p F and Ca=1.1 p F. 相似文献
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随着市场竞争的加剧、信息化的进步、大数据时代的到来、业务流程化的成熟,各大企业为提高企业竞争效益,从顶层开始进行财务管理模式的转型——选择业财融合的管理模式。电力企业作为大型国有企业,也是这次财务管理转型的先驱者,业财融合的运用对其本身是机遇也是挑战。对于持续加大投资力度的电力工程的财务管理来说,需较好抓住业财融合这一管理转型契机,从而提高电力工程财务管理效益。文章从业财融合的要素出发,通过分析电力工程财务运用业财融合的必要性与可行性,从合同、资模块进行融合分析,并进一步构建出事前、事中、事后的“全过程”业财融合工程财务管理模式。 相似文献
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In this paper, a collection of three-dimensional(3D)numerical breast models are developed based on clinical magnetic resonance images(MRIs). A hybrid contour detection method is used to create the contour, and the internal space is filled with different breast tissues, with each corresponding to a specified interval of MRI pixel intensity. The developed models anatomically describe the complex tissue structure and dielectric properties in breasts. Besides, they are compatible with finite-difference-time-domain(FDTD)grid cells. Convolutional perfect matched layer(CPML)is applied in conjunction with FDTD to simulate the open boundary outside the model. In the test phase, microwave breast cancer detection simulations are performed in four models with varying radiographic densities. Then, confocal algorithm is utilized to reconstruct the tumor images. Imaging results show that the tumor voxels can be recognized in every case, with 2 mm location error in two low density cases and 7 mm─8 mm location errors in two high density cases, demonstrating that the MRI-derived models can characterize the individual difference between patients' breasts. 相似文献
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数字档案馆在建设与运营中应当妥善处理版权问题,尽量避免版权侵权.档案馆具有公益性和特殊法律地位,我国应当基于数字网络环境下版权保护的利益平衡原则,完善合理使用制度和法定许可制度,加强版权集体管理和数据库的保护,同时档案馆需要加强技术保护和管理水平. 相似文献