摘要：A 25-channel 200 GHz arrayed waveguide grating （AWG） based on Si nanowire wavegnides is designed, simulated and fab- ricated. Transfer function method is used in the simulation and error analysis of AWG with width fluctuations. The 25-channel 200 GHz AWG exhibits central channel insertion loss of 6.7 dB, crosstalk of-13 dB, and central wavelength of 1 560.55 nm. The error analysis can explain the experimental results of 25-channel 200 GHz AWG well. By using deep ul- traviolet lithography （DUV） and inductively coupled plasma etching （ICP） technologies, the devices are fabricated on sili- con-on-insulator （SOI） substrate.

摘要：二氧化碳(CO_(2))地质封存是当前技术条件下缓解温室效应最直接、最有效的措施之一。黑龙江省林甸地区广泛分布深部咸水层,盖层条件良好,具备CO_(2)地质封存的地质条件,且封存潜力巨大,但因缺乏石油勘探资料,以往尚未进行高精度的适宜性评价。文章以松辽盆地林甸地区为研究对象,紧密结合其地质、经济、环境等实际情况,本着客观、全面、重点、兼容、可行的原则,从封存安全适宜性、封存潜力适宜性、社会经济适宜性3个指标层,分解出11个指标亚层与32个评价指标,划分了5个评价等级,建立了适用于研究区的深部咸水层CO_(2)地质封存适宜性评价体系。在此评价体系基础上,充分利用地热勘探井的数据,基于层次分析法开展研究区各主要二级构造单元乌裕尔凹陷、克山—依龙背斜、黑鱼泡凹陷、齐家—古龙凹陷深部咸水层CO_(2)地质封存适宜性的模糊数学综合评价。结果表明,研究区4个二级构造单元均具备地壳稳定性较好,盖层以多套、厚度大且连续稳定的泥质岩为主,储层为孔隙度大、渗透性好的多套碎屑岩,不易发生地质灾害等条件,均较适宜进行CO_(2)地质封存,其中以黑鱼泡凹陷最佳。此项工作的开展,为该地区实施封存场地选址与封存工程示范提供了科学、直接的依据。

摘要：Based on the antiplatelet aggregation mechanism and the bioisosterism principle of the reference drug picotamide, thirteen novel derivatives of arylamide and arylsulfonamide were designed and prepared. The biological activities of these derivatives were investigated. The chemical structures of the target compounds were confirmed by ^1H NMR and IR. The in vitro activities of antiplatelet aggregation of the thirteen target compounds were assessed by Bore＇s method. Compounds 2b and 8h have significant antiplatelet aggregation activities, which are superior to the corresponding activity of Picotamide.

摘要：数字试验测试验证(Digital Experiment,Testing,and Validation,D-ETV)是利用“数力”和“智力”更好地了解产品或系统基本属性和性能特征的方法,是实现高质高效研制运维的重要支撑手段。然而,在物理试验测试验证(Physical Experiment,Testing,and Validation,P-ETV)向D-ETV演化的过程中,因缺乏基础共性标准参考,导致不同人员对D-ETV的理解与认识存在差异;因缺乏关键技术标准参考,导致D-ETV实现难;因缺乏通用支撑、安全、行业应用等标准参考,导致D-ETV实施难。针对上述问题,首先从D-ETV有何用、如何用、何处用3个角度对D-ETV标准需求进行分析。在作者团队前期提出的D-ETV通用流程“D”模型及关键技术基础上,进一步建立并完善“析-定-建-测-评-融”D-ETV理论体系。面向航空航天、工程机械、船舶、电子信息、汽车等领域的国家重大需求,与相关研究院所和企业共同尝试探索建立一套D-ETV标准体系,包括基础共性、关键技术、通用支撑、安全和行业应用5类标准。期望相关工作为D-ETV理论研究、标准研制、行业应用提供参考,助力我国试验测试验证向数字化、智能化、服务化方向发展,进而为我国装备高质量发展提供支撑。

摘要：在南方地区,软土常常是工程建设无法避免的难题。在软土条件下进行基坑施工,基坑易产生较大的变形,同时也会对周边环境造成不利影响。为减小软土基坑施工自身产生的变形以及对周围临近建筑的影响,从地质特点、变形机理和变形控制措施三个方面,较为系统地阐明了软土基坑变形的研究现状,并总结了一系列基坑变形的控制措施。同时结合实际工程,将总结得到的软土基坑变形控制的核心要点进行应用研究。实践结果表明,该方法对地铁深基坑产生的变形控制具有一定效果。

摘要：以腐蹄病A型节瘤拟杆菌染色体DNA为模板,根据设计的上、下游引物进行PCR反应,扩增出了大小约0.78kb的基因片段,用T_4DNA连接酶将PCR产物与pGEM-T-Easy载体连接,构建了重组质粒。并以EcoRV和Sali双酶切重组质粒鉴定目的基因的插入方向。经序列测定,克隆的目的基因片段为Pili基因。

摘要：Loesses are widely distributed all over the world,especially in ***,long-term agricultural irrigation and extreme climate changes have led to frequent geological disasters in the Heifangtai area of Lanzhou,Gansu,*** these,landslides are one of the most frequent types of disasters that are harmful to humans and the environment.A landslide is closely related to the lithology,structure,and groundwater of the site and consists of a combination of structure units divided by discontinuities,such as faults,joints,and fi ***,geological surveys,engineering drilling,and trenching are typically used to identify the stratum lithology,structure,and groundwater in order to visually display underground information within a limited depth ***,these methods have *** particular,geological surveys can only describe geological phenomena on the surface,while the cost of drilling and trenching may be high,along with the ineffi ciency of *** this research,the integrated geophysical exploration method was used to analyze the hidden joints,cracks,and other discontinuities and geophysical features of the *** results were verified by trench exploration,and large amounts of underground information were obtained,especially the spread and distribution of discontinuities in landslide *** information can be effectively used for carrying out and providing meaningful experiences and lessons in future comprehensive geophysical processing and interpretations related to the prediction and evaluation of landslides.

摘要：This paper proposes a novel collision post structure designed to improve the crashworthiness of subway cab *** structure provides two innovative features:1)a simpler connection between the post and the car roof,which gives a more reasonable load transfer path to reduce the stress concentration at the joint;and 2)a stiffness induction design that provides an ideal deformation model to protect the safe space of the cab *** novel collision post structure was evaluated with finite element analysis,and a prototype cab car was mechanically *** results demonstrate that the deformation response was stable and agreed well with the expected ideal *** maximum load was 874.17 kN and the responses remained well above the elastic design load of 334 kN as required by the design *** addition,there was no significant tearing failure during the whole test ***,the novel collision post structure proposed has met the requirements specified in new standard to improve the crashworthiness of subway cab ***,the energy absorption efficiency and light weight design highlights were also summarized and discussed.

摘要：A transient three-dimensional（3 D） model was established to understand the bubble motion in an industrial electrolytic process. An anode with a new design was tested. It incorporates two slots that allow an efficient removal of gas bubbles. The electromagnetic fields were described by solving Maxwell＇s equations. The bubble movement was studied with two-way coupling Euler-Lagrange approach. The interplay of current density and bubble nucleation rate was included. The collision and coalescence of bubbles were considered. Random walk module was invoked for involving the chaotic effect of the turbulence. The numerical results were validated by experimental measurements. The results indicate that the current distribution and the bubble nucleation periodically change. Due to the slot, the bubble elimination heavily increases. The contribution of the slot to the bubble removal exceeds 50% in the case of three currents, and the promotion of the slot decays with increasing the current.

摘要：The Xi'an Proton Application Facility(XiPAF)is a facility dedicated to the experimental simulation of the space radiation *** facility uses a compact synchrotron as its final-stage *** synchrotron can accelerate a proton beam from 7 to 230 *** design results show that the radio frequency(RF) acceleration system should work in the frequency range of 1—6 MHz and provide a maximum voltage of >800 *** dilute the strong space charge effect during the injection period,we also aim to achieve multiharmonic acceleration.A compact RF acceleration system loaded with magnetic alloy cores has been designed and developed to fulfill these *** preliminary test results show that the system can work normally with a gap voltage of 800 *** a further RF power upgrade,the voltage can be improved to >1:2 kV.