摘要：The recen tly cons true ted cryogenic cylindrical ion trap velocity map imaging spectrometer(CIT-VMI)has been upgraded for coincidence imaging of both ionic and neutral photofragments from photodissociation of ionic *** prepared ions are cooled down in a homemade cryogenic cylindrical ion trap and then extracted for photodissociation *** th the newly designed elec trie fields for extraction and acceleration,the ion beam can be accelerated to more than 4500 eV,which is necessary for velocity imaging of the neutral photofragments by using the position-sensitive imaging detect *** setup has been tested by the 355 nm pho todissocia tion dynamics of the argon dimer cat ion(Ar2+).From the recorded experimen tal images of both neu tral Ar and ionic Ar+fragments,we interpret velocity resolutions of△v/vu4.6%for neutral fragments,and△v/vul.5%for ionic fragments,respectively.

摘要：为了实时智能监测烟草仓储害虫,设计并实现了烟草仓储害虫性诱智能监测系统。该系统由基于机器视觉的智能性诱捕器、性诱害虫识别模型、服务器和Web端系统平台组成。智能性诱捕器通过性诱剂将害虫诱集至粘虫板,机器视觉模块每天定时采集一幅粘虫板图像,并通过4G网络将图像上传至服务器。服务器接收到图像后调用性诱害虫识别模型进行害虫的检测与识别,并将检测结果返回到Web客户端。用户可通过系统平台Web端查看诱集的害虫图像和数量。针对粘虫板图像上的性诱害虫烟草甲Lasioderma serricorne和烟草粉螟Ephestia elutella,建立了YOLOX-TP识别模型,在YOLOX的基础上添加了SEnet注意力机制。与Faster-RCNN、YOLOv4、YOLOX检测模型相比,YOLOX-TP平均精确率和平均召回率最高,达到98.97%和97.12%。烟草仓储害虫性诱智能监测系统实现了烟草性诱害虫图像的定时采集、害虫准确检测与计数、结果可视化和可追溯,为烟草仓储害虫防治决策提供依据。

摘要：以国外高速公路隧道开挖支护施工项目为例,详细介绍了隧道超前支护与初期支护技术,针对隧道塌方问题,实施了顶板沉降孔处理和支护加固措施,确保了隧道结构的安全性和稳定性。通过精确的监测和及时的施工调整,该项目有效控制了施工风险,确保了隧道的顺利开挖与后续施工。

摘要：采用基于分离变量法的有限元半解析法对立井在非轴对称荷载作用下开挖过程中的应力应变的动态变化情况进行了分析 ,得出了立井围岩位移应力随开挖的变化规律 ,并结合支护分析提出了井壁支护设计与施工的最优方法 ,为立井井筒的设计和施工提供了新的思路 ,具有重要的理论价值和广泛的应用前景 图 8,参

摘要：根据2018CNCAP草案及2012CNCAP,进行某A级车侧面碰撞性能的对比分析,通过侧面结构的侵入量、侵入速度的对比分析,明确该车型2018CNCAP侧碰性能水平。并结合CAE分析及试验结果,进行相关性分析,在相关性良好的整车模型基础上,开展基于侧面结构及材料的优化设计,确保乘员生存空间及乘员舱侵入速度满足项目要求。

摘要：This paper is concerned with the robust reliable memory controller design for a class of fuzzy uncertain systems with timevarying delay. The system under consideration is more general than those in other existent works. The controller, which is dependent on the magnitudes and derivative of the delay, is proposed in terms of linear matrix inequality （LMI）. The closed-loop system is asymptotically stable for all admissible uncertainties as well as actuator faults. A numerical example is presented for illustration.

摘要：A novel radome is presented,which is transparent at operating frequency and is invisible out of *** order to prevent reflection of the incoming power,frequency selective surfaces loaded with the lumped resistors are *** obtain the pass-band properties in lower frequencies,the convoluted slots are *** comparison with the results obtained both by full wave analysis and by the measurements,the performance of the radome is *** performs with high transmission characteristics in band,and broadband absorbing properties out of band *** oblique incidences are also investigated for both transmission coefficients and reflection ones.

摘要：开发了一种基于体相位全息(VPH)透射光栅的双偏振自发拉曼光谱测量系统,实现在燃烧场中单脉冲激光下同步定量测量主要气态物种组分(二氧化碳CO_(2)、氧O_(2)、氮N_(2)、水H_(2)O、燃料及中间体C_(x)H_(y))浓度和温度,同步测量的温度可修正其对物种拉曼散射截面的影响。系统中的两套光栅和ICCD相机可同步采集两个互相垂直方向的拉曼散射偏振信号,有效剔除荧光干扰。在可控压力及温度的气样池和McKenna标准火焰燃烧器进行了浓度和温度的标定,温度测量精度小于1.06%,组分浓度测量精度小于1.10%。在某航空发动机模型燃烧室燃烧场中,完成了单工况三维多测点组分浓度和温度的同步单脉冲(20 ns)定量测量。

摘要：目的为完善我国药品法规提供参考。方法分析药品检查合作计划(PIC/S)药品生产质量管理规范(GMP)正文及附录8起始物料和包装材料取样(以下简称附录8)与我国GMP正文及附录9(取样)、2020年版《中国药典》及国家标准的中物料取样要求的差异,针对关键差异问题开展分析和调研,并提出改进建议。结果两种GMP均重视物料取样,但PIC/S GMP人员培训要求更细致,取样方法的设计要求基于风险因素宏观描述;我国GMP对人员培训进行宏观要求,取样方法的设计分门别类,并在其他技术文件(如《中国药典》)中进行详细阐述。共发放调研问卷439份,均有效回收,包含生物制品(含疫苗)、化学注射剂、中药注射剂、普通化学药制剂、原料药、中药饮片等439家生产企业;58家(13.21%)每包取样检测,其余生产企业均完成抽样检验,409家(93.17%)对于“确保起始物料每包标识正确的程序”不知如何验证或认为验证成本高、难度大,358家(81.55%)认为应结合供应商审计建立物料取样计划。分别在四川、云南、江苏、重庆地开展实地调研,涉及中药(含注射剂)、化学药制剂、原料药、生物制品(含疫苗)等共14家生产企业;7家(50.00%)注射剂原料每包取样检测,中药(含注射剂)生产企业认为起始物料无法每包取样检测,8家(57.14%)认为基于供应商审计及物料风险评估建立取样计划可行。结论建议增加注射剂原料及应对无法追溯到生产商的物料进行每包取样检测的要求,中药材及饮片仍遵循原有取样统计学要求抽取部分样品检测,生产企业做好药材供应链管理;增加根据物料的性质、对供应商的资质确认情况以及物料本身的均一性进行风险评估,结合批准的取样规程建立物料取样计划要求。

摘要：Steering control for an autonomous underwater glider （AUG） is very challenging due to its changing dynamic char- acteristics such as payload and shape. A good choice to solve this problem is online system identification via in-field trials to capture current dynamic characteristics for control law reconfiguration. Hence, an online polynomial estimator is designed to update the yaw dynamic model of the AUG, and an adaptive model predictive control （MPC） controller is used to calculate the optimal control command based on updated estimated parameters. The MPC controller uses a quadratic program （QP） to compute the optimal control command based on a user-defined cost function. The cost function has two terms, focusing on output reference tracking and move suppression of input, respectively. Move-suppression performance can, at some level, represent energy-saving performance of the MPC controller. Users can balance these two competitive control performances by tuning weights. We have compared the control performance using the second-order polynomial model to that using the filth-order polynomial model, and found that the tbrmer cannot capture the main characteristics of yaw dynamics and may result in vibration during the flight. Both processor-in-loop （PIL） simulations and in-lake tests are presented to validate our steering control performance.