摘要：Energetic particle radiation diagnoses mainly detect the particles(such as neutrons,gamma rays,hard X-rays,and escaping electrons)that are radiated in the discharge process of the experimental advanced superconducting tokamak device to characterize the operating state of the plasma in real *** upgrading of these diagnoses requires new instruments based on national(here,“national”means developed and produced by a Chinese company)core chips and open-source software with advanced digitization,a high sampling rate,and a high time *** new spectroscopy system designed in this study adopts the national field-programmable gate array(FPGA)and an analog-to-digital converter as the core chip,and it is developed using Qt on *** communication between the FPGA and embedded controller occurs via a high-speed peripheral component interconnect eXtension for instrument express protocol with a direct memory access *** this basis,the time resolution of the system is improved from 2 to 1 ms,the maximum channel address is increased to 4096,and the sampling rate is increased from 10 to 80 *** experiments of the spectroscopy system with 152Eu and 137Cs sources demonstrate that the best energy resolution is 0.27%and the measurement error is less than±0.5 keV.

摘要：针对“计算机网络”实验课程面临的实验设置零散、实验设备不足、实验内容单一、考评指标不充分的问题,分析了国内外关于“计算机网络”实验课程教学的方式方法,提出以案例为驱动、多样化实验环境、多层次实验内容、多指标考核评价的“计算机网络”实验课程设计思路。改进后的教学模式调动了学生的实践积极性,多样化实验环境和多层次实验内容可以满足不同层次学生的需求。实验考评降低了报告分数占比,加强过程考核及自评互评等,综合评价学生学习效果。对学生反馈的问题明确了下一步改进方向。

摘要：多晶硅太阳电池以其价格低廉的优势成为低成本太阳电池的首选,但其光电转换效率提升空间有限。钝化发射极和背面电池(PERC)技术是当前晶硅太阳电池提效的主要途径。多晶PERC电池结合了多晶硅电池的低成本和PERC电池的高效,是当前多晶硅电池的研究热点。本文研究了多晶PERC电池的背面和正面结构优化与设计,提出了提高多晶PERC电池效率的产业化技术方法。通过在硅片背面用三层SiNx:H薄膜来代替常规双层SiNx:H薄膜,在保证优良的背面钝化的同时,使电池长波响应得到改善,电池光电转换效率由20.19%提升至20.26%。优化多晶PERC电池的背面激光开窗工艺,使多晶电池效率较常规工艺提升0.11%。而在多晶PERC电池的正面叠加选择性发射极技术,可较常规工艺提升电池效率0.10%。综合运用多种提效手段有利于保持多晶PERC电池的竞争力。

摘要：Four eburicane-type triterpenoids with malonyl modifications,namely irpexoates A-D(1-4),were isolated from the fruiting bodies of the medicinal fungus Irpex *** structures of the new compounds were established by extensive spectroscopic methods,including 1D and 2D NMR,HRESIMS spectroscopic *** B(2)displayed weak cytotoxicity against four human cancer cell lines(A-549,SMMC-7721,MCF-7,SW480)with IC50 values varying from 22.9 to 34.0 pM,and irpexoate D(4)showed weak cytotoxicity against the human cancer cell line SW480 with an IC50 value of 35.2μM.

摘要：随着工业的发展,染料废水对人类和环境的危害愈加显著,其中偶氮类的亚甲基蓝这种染料废水不仅色度大,而且难以降解.因此设计一种高效且灵敏的吸附剂来去除亚甲基蓝对人类和环境的危害是亟须解决的问题.本研究利用基于色散力校正的密度泛函理论(DFT-D)的第一性原理方法探索了本征及掺杂磷烯吸附剂对亚甲基蓝的吸附机理,并详细考察了本征及掺杂Al,Ca,Ti和Fe金属原子后的磷烯对亚甲基蓝吸附的影响.研究结果表明亚甲基蓝初始构型会影响磷烯对其吸附,当亚甲基蓝平躺于磷烯表面时有较大的吸附,且金属原子掺杂显著地影响其对亚甲基蓝的吸附能力,掺杂金属原子均增大了磷烯对亚甲基蓝的吸附.其中吸附能力是Fe掺杂磷烯>Ca掺杂磷烯>Ti掺杂磷烯>Al掺杂磷烯.研究结论对于亚甲基蓝的处理带来了新的指导方向,有望为相关染料废水的检测和去除提供有意义的理论参考.

摘要：为制备牛冠状病毒N蛋白多克隆抗体,建立简单快捷的牛冠状病毒检测方法。根据牛冠状病毒N基因序列设计引物,将N基因重组至PET-30a载体上,经PCR及测序鉴定重组载体构建成功;将构建的PET-30a-N重组质粒转入大肠埃希氏菌DH5-α和Rosetta(DE3)感受态细胞,进行扩增和诱导表达,后经超声破碎后获取N蛋白并进行蛋白纯化;最后将纯化后的N蛋白与弗氏佐剂乳化后免疫新西兰白兔,共制得35 mL抗N蛋白多克隆抗体血清,经Western blot和IFA鉴定,抗N蛋白多克隆抗体有良好的特异性,试验制备的抗N蛋白牛冠状病毒多克隆抗体可用于牛冠状病毒的检测。

摘要：医学具有自然科学和人文科学的双重属性,医学类通识教育课程融入思政教育,更能发挥潜移默化、事半功倍的育人实效。文章以《大学生与生殖健康》为例,探索医学类通识课程思政教学的改革模式,从而实现“知识传授、能力提升、价值引领”同步提升。在教学管理部门的统筹安排和监督指导下,本课程从教师队伍“主力军”、课程建设“主战场”和课堂教学“主渠道”等三个方面全面推进改革,构建医学类通识教育课程思政的实践路径。具体举措包括:采用专题培训、集体备课、教学比赛、示范课程观摩等多形式建设师资团队,通过细化教学大纲、建立思政素材库、设立思政示范章节等多样化改革课程设计,采用案例分析、分组讨论、第二课堂等多方式改革课堂授课。文章通过以上探索及改进,为“健康中国”背景下高校通识课程的思政教学提供了有价值的参考。

摘要：A novel extrusion-shearing(ES) composite process was designed to fabricate fine-grained, high strength and tough magnesium alloy. The structural parameters of an ES die were optimized by conducting an orthogonal simulation experiment using finite element software Deform-3D, and Mg-3 Zn-0.6 Ca-0.6 Zr(ZXK310) alloy was processed using the ES die. The results show that the optimized structural parameters of ES die are extrusion angle(α) of 90°, extrusion section height(h) of 15 mm and inner fillet radius(r) of 10 mm. After ES at an extrusion temperature and a die temperature of 350 °C, ZXK310 alloy exhibited good ES forming ability, and obvious dynamic recrystallization occurred in the forming area. The grain size decreased from 1.42 μm of extrusion area to 0.85 μm of the forming area. Owing to the pinning of second phase and formation of ultrafine grains, the tensile strength, yield strength and elongation of alloy reached 362 MPa, 289 MPa and 21.7%, respectively.

摘要：采用内外环结构来避免直接设计四旋飞机的欠驱动控制律,内外环结构以位置子系统作为外环,姿态子系统作为内环。首先,通过反步法逐步递推得到子系统的控制输入,通过该控制输入,一方面,可推导出内环横滚角与俯仰角的期望值,另一方面,可计算得出欠驱动控制律。以推导出的横滚角和俯仰角期望值以及给定的偏航角期望值作为姿态的目标轨迹,通过反步法进一步设计得出相应的姿态控制律。考虑到执行器可能会发生故障,采用自适应方法分别对内环和外环的故障进行估计,从而实现四旋翼飞行器的容错控制设计。相比于直接设计方法,本文方法得到的欠驱动控制律结构简单,且能实现对执行器故障的容错。研究结果表明:四旋翼飞行器在执行器故障下仍能实现位置和姿态的稳定跟踪,验证了所得控制律的有效性。

摘要：Moleculardeviceswith highswitchingperformance and/or the perfect spin filtering effect have always been the pursuit with the development of molecular ***,yusingthe 2001.0V ***'s function method in combination with the density functionaltheory,the switching performance and spin filtering properties of dimethyldihydropyrene(DHP)/cyclophanediene(CPD)photoswitchable molecule connected by carbon atomic chains(CACs)to two zigzag graphene nanoribbon electrodes have been theoretically *** results show that DHP is more conductive than CPD and therefore an evident switching effect is demonstrated,and the switching ratio(RON/OFF)can reach 4.5×*** is further revealed that the RoON/OF of DHP/CPD closely depends on the length of *** specifically,the RoN/OFF values of DHP/CPD with odd-numbered CACs are larger than those with even-numbered *** interestingly,a high or even perfect spin filtering effect can be obtained in these investigated DHP/CPD single-molecule *** study is helpful for future design of single-molecule switches and spin filters and provides a way to optimize their performance by means of varying the length of bridging CACs.