摘要：基于修正的Drucker-Prager Cap模型建立弹塑性本构模型,采用三维有限元模型对粉末压制过程及压制脱模后压坯的残余应力进行仿真分析。利用几个典型的力学性能测试实验确定粉末Distaloy AE的模型参数。模型通过用户子程序USDFLD实现,对粉末Distaloy AE的模压过程及脱模后压坯(d20 mm×5 mm)的残余应力进行预测分析。有限元分析结果与模压实验和X衍射实验结果基本吻合,验证了模型的有效性。结果表明,压坯的侧表面存在一层显著的残余压应力,而压坯上表面和下表面的残余应力值则很小。

摘要：With a lot of millimeter-wave(mm-Wave)applications being issued,wideband circuits and systems have attracted much attention because of their strong applicability and *** this paper,four transformer-based ultra-wideband mm-Wave circuits demonstrated in CMOS technologies are reviewed from theoretical analysis,implementation,to ***,we introduce a mm-Wave low-noise amplifier with transformer-based Gm-boosting and pole-tuning *** achieves wide operating bandwidth,low noise figure,and good gain ***,we review an injection-current-boosting technique which can significantly increase the locking range of mm-Wave injection-locked frequency *** on the injectionlocked principle,we also discuss an ultra-wideband mm-Wave divider with the transformer-based high-order ***,an E-band up-conversion mixer is presented;using the two-path transconductance stage and transformer-based load,it obtains good linearity and a large operating band.

摘要：相比于传统的风洞设备,低温风洞可以生成更高雷诺数的气流,而风洞降温过程中残留的痕量水蒸气可能会影响试验件气动参数的测量。痕量水结冰的热力学过程复杂,实验测试较为困难,其机理仍需深入研究。针对该问题,本文基于欧拉方法建立了空气⁃过冷水滴⁃冰晶多相流模型,仿真结果与文献中的实验数据吻合度较高,进一步采用该模型获得了低温风洞中水蒸气凝结液滴/冰晶撞击翼型的结冰过程,探究了气流中总的水含量、融化比、气流温度、压力、马赫数等参数对结冰过程的影响,并定量分析了结冰现象对翼型气动参数的影响,可为低温风洞的实际运行提供一定的理论参考。

摘要：A wideband dual-feedback low noise amplifier(LNA) was analyzed, designed and implemented using SiGe heterojunction bipolar transistor(HBT) technology. The design analysis in terms of gain, input and output matching, noise and poles for the amplifier was presented in detail. The area of the complete chip die, including bonding pads and seal ring, was 655 μm×495 μm. The on-wafer measurements on the fabricated wideband LNA sample demonstrated good performance: a small-signal power gain of 33 dB with 3-dB bandwidth at 3.3 GHz was achieved;the input and output return losses were better than-10 dB from 100 MHz to 4 GHz and to 6 GHz, respectively; the noise figure was lower than 4.25 dB from 100 MHz to 6 GHz; with a 5 V supply, the values of OP1 dB and OIP3 were1.7 dBm and 11 dBm at 3-dB bandwidth, respectively.

摘要：Based on a stochastic wire length distributed model, the interconnect distribution of a three-dimensional integrated circuit （3D IC） is predicted exactly. Using the results of this model, a global interconnect design window for a giga-scale system-on-chip （SOC） is established by evaluating the constraints of 1） wiring resource, 2） wiring bandwidth, and 3） wiring noise. In comparison to a two-dimensional integrated circuit （2D IC） in a 130-nm and 45-nm technology node, the design window expands for a 3D IC to improve the design reliability and system performance, further supporting 3D IC application in future integrated circuit design.

摘要：Central composite design(CCD),together with multiple linear regression,was successfully used to optimize the electrophoretic buffer system of micellar electrokinetic capillary chromatography(MEKC) for the determination of albiflorin,paeoniflorin,liquiritin,and glycyrrhizic acid in the traditional Chinese medicine(TCM) prescription,Yangwei *** of sodium deoxycholate(SDC) and borate,and proportions of ammonia,acetonitrile,and methanol were *** total resolutions of peaks between the analytes and their adjacent peaks in real samples were integrated into the evaluation index of separation *** optimum electrophoretic buffer contained 80 mmol/L SDC,20 mmol/L borate,5%(v/v) methanol,0.5%(v/v) ammonia,and 5%(v/v) *** correlation coefficients(R 2 ) between the peak areas and the corresponding concentrations of analytes were greater than *** limits of detection(LODs) (S/N=3) of the analytes were 0.97-4.00μg/*** results indicate the superiority of CCD in optimizing the separation conditions of complex samples such as TCM prescriptions.

摘要：防冰热载荷分布预测是螺旋桨飞机防冰系统设计的关键,目前对螺旋桨飞机防冰热载荷的研究却十分匮乏。基于多参考系和Messinger热力学模型对三维螺旋桨进行了模拟,分析了防冰热载荷的影响。结果表明:防冰热载荷主要集中在叶片前缘,沿叶片展向先增大后减小;随着来流速度的增加,防冰功率及范围均先增大后减小。由于旋转效应的影响,迎角的影响可以忽略不计。此外,随着环境温度的降低,防冰功率呈线性增加。基于CCAR-25附录C规定的严重结冰条件,转速为660 r/min时,叶片的防冰范围在弦向上极限为2.1%,在弦向下极限为6.7%;防冰最大功率为9.5 kW/m2。单台螺旋桨防冰功率超过1.96 kW。本研究为螺旋桨飞机的表面防冰提供了科学的解释,为螺旋桨飞机防冰系统的安装提供了理论依据。

摘要：Images are widely used by companies to advertise their products and promote awareness of their *** automatic synthesis of advertising images is challenging because the advertising message must be clearly conveyed while complying with the style required for the product,brand,or target *** this study,we proposed a data-driven method to capture individual design attributes and the relationships between elements in advertising images with the aim of automatically synthesizing the input of elements into an advertising image according to a specified *** achieve this multi-format advertisement design,we created a dataset containing 13280 advertising images with rich annotations that encompassed the outlines and colors of the elements,in addition to the classes and goals of the *** our probabilistic models,users guided the style of synthesized advertisements via additional constraints(e.g.,context-based keywords).We applied our method to a variety of design tasks,and the results were evaluated in several perceptual studies,which showed that our method improved users’satisfaction by 7.1%compared to designs generated by nonprofessional students,and that more users preferred the coloring results of our designs to those generated by the color harmony model and Colormind.

摘要：多模态疗法是结合多种疗法治疗通常复杂而隐蔽的肿瘤组织的最有希望的策略之一.尽管多功能纳米材料已被设计用于构建多模态疗法,但普遍存在的各组成部分之间的不充分协调可能导致协同治疗效果不佳,并妨碍其充分实现临床潜力.在此,受可控“集束炸弹”模型的启发,我们设计了一种智能、生物相容、多功能的纳米工厂系统(PDA@GOx@MnO_(2)-PEG),它封装了多种纳米试剂,以达到对肿瘤组织的高破坏效率.刺激反应性的外层二氧化锰作为“炸弹”的外壳可触发级联催化反应,并与GOx形成一个自给自足的环形催化链.PDA作为一种具有良好蛋白质携带能力的基质,实现了高的GOx负载.同时,其高效的光热转换效率显示了低温(~45℃)进一步提高GOx酶活性的潜力.值得注意的是,内部的GOx就像一个“子炸弹”,通过控制释放来增加肿瘤缺氧部位的积累,并在充足的氧气和低热度的帮助下充分发挥其葡萄糖消耗能力进行饥饿治疗.在这个体系中,各种纳米试剂相互配合,层层推进,充分发挥其威力,形成了一个自给自足的纳米工厂模型,通过协同策略实现了良好的低温光热-饥饿协同治疗.此外,该纳米复合材料表现出三态成像能力,可用于敏感诊断和实时监控治疗.这项研究为设计生物相容性和智能治疗纳米平台提供了新的见解,使精准医疗中的多模式治疗效果最大化.

摘要：A tri-port MIMO antenna designed for Micro/Pico-Cell application is *** is based on printed elements with X-shaped arms,which are oriented to 0°,120° and240° in the azimuth *** arms of these elements are connected,with which a selfdecoupled structure is *** mutual coupling between adjacent elements is below-15 ***,it size is compact and bidirectional radiation patterns with around 4dBi Gain and 92° 3dB beam width is achieved,which can provide good pattern diversity and full azimuth coverage in real applications.