摘要：The Accelerator Driven Sub-critical(ADS)system is a strategic plan to solve the nuclear waste problem for nuclear power plants in ***-energy particle accelerators and colliders contain long strings of superconducting devices,superconducting radio frequency cavities,and magnets,which may require cooling by 2 K superfluid helium(HeliumⅡ).2 K superfluid helium cryogenic system has become a research hot spot in the field of superconducting *** this study,the ADS Injector-I 2 K cryogenic system is examined in *** cryogenic system scheme design,key equipment,and technology design,such as the 2 K Joule–Thomson(J–T)heat exchanger and cryomodules CM1+CM2 design,are examined,in addition to the commissioning and operation of the cryogenic *** ADS Injector-I 2 K cryogenic system is the first 100 W superfluid helium system designed and built independently in *** ADS proton beam reached 10 Me V at 10 m A in July 2016 and 10 Me V at 2 m A in continuous mode in January 2017 and has been operated reliably for over 15,000 h,proving that the design of ADS Injector-I 2 K cryogenic system,the key equipment,and technology research are reasonable,reliable,and meet the *** research into key technologies provides valuable engineering experience that can be helpful for future projects such as CI-ADS(China Initiative Accelerator-Driven System),SHINE(Shanghai High Repetition Rate XFEL and Extreme Light Facility),PAPS(Platform of Advanced Photon Source Technology),and CEPC(Circular Electron-Positron Collider),thereby developing national expertise in the field of superfluid helium cryogenic systems.

摘要：龙伯透镜天线是一种独特的渐变折射率透镜天线,但因为某些缺陷其应用受到限制。近年来,人们采用变换光学方法和超材料理论设计了许多以平板龙伯透镜为代表的新型透镜天线。本文对比总结了变换光学设计透镜的3种方法,即坐标变换法、保角变换法和准保角变换法;指出了准保角变换法由于设计灵活、可使用全介电材料制备而更具研究和应用前景;详细阐述了准保角变换法设计透镜的原理和步骤;介绍了国内外关于透镜变换和制备具有影响力的研究成果;指出了变换光学透镜天线今后的研究方向。

摘要：以飞机复材副油箱为研究对象,发展“整体-局部”双尺度铺层设计方法,对具有多尺度特征的封闭椭球体飞机副油箱整体与局部铺层进行了优化设计和分析。首先,基于副油箱特征结构,发展了副油箱结构力学分析方法,构建了具备防雷击功能的碳纳米管复合材料力学求解模型,综合分析蒙皮-筋条铺层结构在等效静强度和冲击工况下的载荷响应,并针对最佳铺层方案提出一种铺层顺序优化方法完成初步铺层优化;然后,考虑局部变厚度插层区的应力不均匀和层间/富树脂区损伤失效,采用内聚力单元和分层建模策略建立了变厚度试样细观力学模型,基于“子模型”和“壳-固”耦合技术,建立了副油箱局部变厚度结构求解模型,并提出了协同改善局部变厚度区受力的整体结构铺层设计方案;最终,根据整体-局部铺层优化后的设计方案,进行静力学、模态、冲击动力学分析,完成对副油箱整体结构的强度校核和验证。

摘要：针对植保喷头试验研究特点,分析其参数化设计流程,依据影响喷头性能的规律选择和确定喷头可修改的结构参数,利用Pro/E的二次开发工具Pro/Toolkit开发出植保喷头参数化设计模块,从而满足植保喷头试验研究的要求。

摘要：目的探讨酚磺乙胺对苦味酸法和肌氨酸氧化酶法测定肌酐的干扰情况。方法参照临床化学检验的干扰评价(CLSI EP7-A2)规则,设计配对差异试验和剂量试验,判断酚磺乙胺对苦味酸法和肌氨酸氧化酶法测定肌酐是否有干扰及干扰效应与酚磺乙胺浓度的关系。结果酚磺乙胺对苦味酸法测定肌酐有正干扰,对肌氨酸氧化酶法测定肌酐有负干扰,其干扰效应与酚磺乙胺浓度的关系均为二次曲线关系,酚磺乙胺对苦味酸法和肌氨酸氧化酶法测定肌酐的最小干扰浓度分别为0.070 g/L和0.016 g/L。结论酚磺乙胺对苦味酸法和肌氨酸氧化酶法测定肌酐均有干扰,在临床上必须采取措施避免这种干扰的出现。

摘要：运用证据图系统检索与梳理口服中成药治疗脑出血(intracerebral hemorrhage,ICH)的临床研究证据,了解该领域现有证据分布及质量。通过检索中国知网(CNKI)、万方(Wanfang)、维普(VIP)、中国生物医学文献服务系统(SinoMed)、PubMed、Web of Science、EMbase、Cochrane Library数据库,建库至2024年7月5日发表的相关文献,采用图、表结合文字形式展示数据分布特征。共检索到35种中成药,纳入261篇文献,将中成药的基本信息、发文趋势、中医证型、干预措施、结局指标等进行对比和分析,并对文献方法学质量进行评价。结果显示,治疗ICH的中成药临床定位宽泛;未充分体现中医优势与特色;安全性信息尚不完善;结局指标评价方面评价标准不统一,对认知功能、心理学方面关注略显不足;文献方法学质量较低。建议在今后的临床研究中,规范试验设计,突出中医特色;将中医证候评价作为重要结局指标,并统一评价标准,多关注患者认知功能与心理学情况;建议治疗ICH中成药的上市许可持有人按照国家药品监督管理局相关要求,规范临床定位,修订完善说明书中安全性信息;提高医保目录中甲类中成药占比,合理配置有限的医疗资源。

摘要：土石坝填料一般处于平面应变状态,目前填料力学特性研究基本采用大型三轴试验。由于三轴应力状态下中主应力等于小主应力,平面应变状态下大坝填料的力学性能会被低估。为充分认识填料潜能,科学设计和合理评估土石坝,有必要对填料开展平面应变试验研究。应用大型真三轴仪对填料进行了大型平面应变试验,共开展了4种不同初始干密度的粗粒土平面应变各向等压固结排水剪切试验。结果表明:应力-应变关系主要为应变硬化型,应力曲线呈爬升型,体变表现为剪缩。某一小主应力下,大小主应力之差的最大值随初始干密度的增大呈线性增大;初始干密度一定时,大小主应力之差的最大值与小主应力呈线性关系增大。初始剪切阶段,小主应力一定时,偏应力与球应力之比曲线斜率随初始干密度的增大而增大,随剪切变形的发展,不同初始干密度的应力比曲线逐渐趋于接近。偏应力随球应力的增大单调增加则对应应变硬化型,若偏应力随球应力的增大先增加后减小则对应应变软化型。相同小主应力时,初始弹性模量随初始干密度的增大而增大,近似呈线性关系;某一初始干密度下,初始弹性模量随小主应力的增大基本呈线性关系增大。中主应力系数随大主应力方向应变的增大而增大,曲线形态呈三折线形,初始剪切阶段增长较为缓慢,随剪切变形的增大增长相对加快并呈线性关系增大,如曲线末端下弯为应变硬化型,曲线末端上翘为应变软化型。

摘要：Using an optical vortex coronagraph （OVC） is one of the most promising techniques for di- rectly imaging exoplanets because of its small inner working angle and high throughput. This paper presents the design and laboratory demonstration performance of an OVC based on liquid crystal polymers （LCPs） at 633 nm and 1520 nm. The OVC can deliver good performance in laboratory tests and achieve a contrast of 10-6 at an angular distance of 3A/D, which can be implemented for imaging young giant exoplanets in combination with extreme adaptive optics.

摘要：Most materials can be easily corroded or ineffective in carbonaceous atmospheres at high temperatures in the reactor core of the high temperature gas-cooled reactor(HTGR).To solve the problem,a material performance test apparatus was built to provide reliable materials and technical support for relevant experiments of the *** apparatus uses a center high-purity graphite heater and surrounding thermal insulating layers made of carbon fiber felt to form a strong carbon reducing atmosphere inside the *** designed tungsten rhenium thermocouples which can endure high temperatures in carbonaceous atmospheres are used to control the temperature field.A typical experimental process was analyzed in the paper,which lasted 76 hours including seven *** results showed the test apparatus could completely simulate the carbon reduction atmosphere and high temperature environment the same as that confronted in the real reactor and the performance of screened materials had been successfully tested and *** temperature in the apparatus could be elevated up to 1600oC,which covered the whole temperature range of the normal operation and accident condition of HTGR and could fully meet the test requirements of materials used in the reactor.

摘要：水力压裂是目前最常用的煤层增透技术,对瓦斯的高效抽采十分重要。为了解决水力压裂技术因装备技术水平不足以及评价方法不完善造成的孔径小、流量小、难评价的问题,提升矿井瓦斯抽采效率,通过多泵并联压裂系统、瞬变电磁法、钻孔验证(盐度检测)等压裂范围检测技术,对大孔径、大流量水力压裂增透技术及评价方法进行了研究。研究结果表明,该技术可以适应煤矿井下实际工作环境与要求,压裂钻孔的影响半径最大达到152.5 m;采用该技术的压裂区域内抽采钻孔平均单孔抽采纯量是普通技术的2.29~3.25倍,部分区域平均单孔抽采纯量可达普通压裂技术的3.70~5.25倍,水力压裂增透效果良好。