摘要：The outbreak in Shanghai,China in 2022 brought huge challenges to this protracted battle against the *** on the deliberate metaphor theory,this study uses the news reports of Shanghai’s fight against the COVID-19 pandemic as the corpus and uses quantitative and qualitative methods to analyze the types and characteristics of deliberate metaphors and its pragmatic purpose in a specific *** results show that there are various types used in news reports,among which War metaphor,Climate metaphor and Education metaphor are used *** deliberate metaphors makes the news more understandable attractively and pleasantly,thus evoking the emotional resonance of the public.

摘要：吴梅村生活于明清易代之际,是入清后的诗坛领袖。时局的变化、国家和民族的衰亡激发了其愤怒之情,他以数量众多、艺术精工的七言歌行诗记述时事、反映社会,风格苍凉激越而缠绵哀婉,其诗歌被称为独步一代的"梅村体"而影响深远。

摘要：采用高通量测序技术获得了麦冬转录组53466条Unigenes,并通过序列分析识别出35832个SSR位点,分布于24539条Unigenes上,SSR出现频率高达67.02%,平均分布距离为4.88 kb。对包含SSR位点的24539条Unigenes进行GO和KEGG注释,结果显示主要集中于生物学过程、植物-病原体互作等基因功能和代谢通路。从SSR重复基元类型来看,单核苷酸重复数目最多,占比57.06%,其中A/T为绝对优势类型,有20193个;五核苷酸重复平均分布距离最高,为4069.34 kb。从重复次数来看,基元重复10次以上的类型数目最多,有20849个,占比61.69%。随机挑选30个不同类型的SSR基元位点并设计引物,对川麦冬、浙麦冬基因组DNA进行PCR扩增,结果显示28对引物可以在两个栽培种中扩增出条带,其中16对引物可扩增出目的条带。

摘要：In this paper, we present an ultrafast digitizer utilizing the DRS4 switched capacitor array applicationspecific integrated circuit to achieve an ultrafast sampling speed of at most 5 GS/s. We cascaded all eight channels(sub-channels) of a single DRS4 chip for increased storage depth. The digitizer contains four DRS4 chips, a quadchannel analog-to-digital converter,a controlling fieldprogrammable gate array, a PXI interface, and an SFP+connector. Consequently, each DRS4 channel has a depth of 8192 points and a vertical resolution of 14 bits. The readout sequences should be broken into several segments and then reordered to obtain the correct sequential data sets, and this offline procedure varies in different readout modes. This paper describes the design and implementation of the hardware;in particular, the respective processing procedures are described in detail. Furthermore, the offset error is calibrated and corrected to improve the precision of the captured waveform in both single-channel and highresolution modes.

摘要：基于Pam-Crash/Safe软件建立了正面25%重叠率碰撞工况车辆-假人有限元基础模型。简化了前端主要吸能构件弯曲和压溃的性能表达,以结构件侵入量作为约束条件,将总目标吸能量分解到子构件上,根据其可压溃长度计算出所需的平均反力。最后,设计断面参数以满足平均反力和吸能量的要求。结果表明,所设计的前端结构能够满足正面25%重叠率碰撞等3种正面碰撞工况的法规要求。本文方法不仅提高了结构优化效率,还在一定程度上实现了"正向设计"。

摘要：产品适老化的好坏直接影响老年人的使用体验和生活品质的提升,随着我国人口老龄的全面化和新老年群体需求的转变,对产品适老化设计方法的研究非常必要和迫切。在分析目前新老年需求特征的基础上,以红外理疗仪这一典型老年康养产品为例,在模糊QFD研究框架下,应用感性工学理论和模糊层次分析法,测量、排序、筛选老年人的感性要素进而转译为产品设计特征,识别关键适老化设计特征,为红外理疗仪适老化设计提供方向和依据,探索并完善适老化设计方法,提升产品体验和可用性。

摘要：采用新型 ＬＵ隐式格式和改良型高阶 ＭＵＳＣＬ ＴＶＤ格式求解全三维雷诺平均的 Ｎａｖｉｅｒ－Ｓｔｏｋｅｓ方程和 ｑ－ｗ低雷诺数双方程湍流模型，对一台ＮＡＳＡ跨音单级透平在不同工况下的内部流场进行了详细的数值模拟，并与可能得到的实验结果进行了对比。总结了小流量工况下动叶内部流动的分离模式。

摘要：Transient electromagnetic method (TEM),as a non-seismic geophysical exploration mainstream electromagnetic method,is widely used in oil,gas,mineral and other underground resources exploration areas. The coil sensor is generally used to collect data. In view of the problems of incomplete information of the abnormal body and the data loss in the existing TEM single-component coil sensor,a three-component TEM coil sensor is designed. By analyzing the relationship between sensor sensitivity and coil structure parameters,the coil structure and turns are designed. By analyzing the frequency response characteristics of the TEM magnetic field sensor,the signal distortion is reduced by using the under-damped matching mode. By analyzing the distribution of various noise sources of the magnetic sensor,the appropriate amplifier is selected to reduce the background noise. Finally,a three-component TEM induction magnetic field sensor is designed. The weight of the sensor is controlled at 3.2 kg and the working frequency is 10 mHz-10 kHz. The background noises of X and Y components probably keep in 1.5×10^-8 V/ Hz and sensitivities are 8.4 and 9.8 nT/s,respectively,the background noise of vertical component is 2.1× 10^-7 V/ Hz and sensitivity is 18.5 nT/s. Compared with the existing single-component TEM receiving magnetic field sensor,the designed sensor realizes the signal acquisition of three components. Without too much increase in volume and total weight,it improves the sensitivity of the sensor and reduces the background noise,thus the signal-to-noise ratio (SNR) of the signal is improved.

摘要：随着"互联网+"发展的趋势,医务人员对医学影像的移动化也有了一定的需求。针对这一需求,本文提出了一种基于网页(web)的可视化医学影像平台。首先,本文分析了绘制医学影像的可行性以及技术要点,通过医学图像处理和科学可视化的跨平台应用框架(Me Vis Lab)对电子计算机断层扫描成像(CT)或磁共振成像(MRI)图像进行三维(3D)重建,并且封装成可扩展3D语言(X3D)文件。然后,应用第五代超文本标记语言(HTML 5)和网页编程图形库(Web GL)渲染引擎库,设计出专门为3D图像渲染的浏览器/服务器(B/S)系统,并利用该系统解析、渲染X3D图像文件。本文的研究结果显示,该平台适用于多个操作系统,便于实现医疗影像数据的跨平台化、移动化。最后,本文对医疗影像平台的发展进行了展望,指出web技术的应用将促进医疗影像数据的共享,也便于实现基于医疗图像的远程会诊和远程教学。

摘要：采用容性耦合匹配结构,基于0.1μm GaAs pH EMT工艺设计了一个Ka波段三级宽带功率放大器MMIC.为了辅助宽带功放设计,提出了一组公式来分析这一匹配结构.在展示的功放中,此结构同时实现了宽频带和高效率.功放处于饱和状态时,测得在32～40 GHz频率范围内的PAE大于30%,功率增益超过15.5dB,功率约20 dB m.这一结果证明了这种设计方法的有效性.