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Dual-band reflective polarization converter based on metasurface

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Optoelectronics Letters 2023年第12期19卷 716-720页

作者： LIN Xiaofang ZHANG Xu CHANG ming LI Wenqiang yu Siyang ZHANG Maolong Air Force Communications NCO Academy Dalian I16000China Shandong Provincial Key Laboratory of Laser Polarization and Information Technology School of Physics and Physical EngineeringQufu Normal UniversityQufu 273165China Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology Shanghai 200092China

In this paper,a dual-band and reflective polarization converter based on metasurface is *** unit cell is composed of two layers of metal plates separated by a dielectric *** simulation results show that the proposed converter is able to convert x-or y-polarized incident waves into cross-polarized waves perfectly in frequency bands of 6.75–10.59 GHz and 17.78–19.61 GHz,and the polarization conversion ratio(PCR)is nearly 100%,which can also convert linearly polarized waves into circularly polarized waves at four *** can be widely used in applications of radar satellites,antenna design and telecommunication with the function of realizing polarization conversion in two bands and achieving high PCR simultaneously.

关键词： polarization reflective converter

Chylothorax following posterior low lumbar fusion surgery:A case report

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World Journal of Clinical Cases 2021年第22期9卷 6522-6530页

作者： Xian-ming Huang ming Luo Li-yu Ran Xuan-He You Di-Wei Wu Shi-Shu Huang Quan Gong Department of Orthopedic Surgery and Orthopedic Research Institute West China HospitalSichuan UniversityChengdu 610041Sichuan ProvinceChina

BACKGROUND Postoperative chylothorax is usually regarded as a complication associated with cardiothoracic surgery;however,it is one of the rare complications in orthopedic *** case report describes a female patient who developed chylothorax after a successful L4-S1 transforaminal lumbar interbody fusion *** etiology,diagnosis,and treatment were analyzed and *** SUMMARY A 50-year-old woman was admitted with repeated back and leg *** was diagnosed with L4 degenerative spondylolisthesis,L4/L5 and L5/S1 intervertebral disc herniation and L5 instability,and underwent successful posterior L4-S1 instrumentation and fusion ***,thoracic effusion was identified 2 d after *** thoracic effusion was finally confirmed to be chylous based on twice positive chyle qualitative *** patient was discharged after 12-d persisting drainage,3-d total parenteral nutrition and fasting,and other supportive *** recurring symptoms were observed within 12 mo *** Differential diagnosis is crucial for unusual thoracic *** diagnosis and treatment of chylothorax are *** intraoperative protection to relieve high thoracic pressure caused by the prone position is important.

关键词： Chylothorax Conservative managements Diagnosis Posterior lumbar surgery Complication Case report

康复训练联合高压氧对高血压脑出血术后患者脑血管动力学、血管内皮功能和血清NSE、UCH-L1、GFAP的影响

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现代生物医学进展 2024年第5期24卷 882-886页

作者：范真真孙鲁琨彭霈尚明富谢倩钟萍中国人民解放军联勤保障部队第九六〇医院康复科山东济南250031

目的:观察康复训练联合高压氧对高血压脑出血术后患者脑血管动力学、血管内皮功能和血清神经元特异性烯醇化酶(NSE)、泛素羧基端水解酶(UCH-L1)、神经胶质纤维酸性蛋白(GFAP)的影响。方法:按照随机数字表法将2021年3月~2022年12月我院... 详细信息

目的:观察康复训练联合高压氧对高血压脑出血术后患者脑血管动力学、血管内皮功能和血清神经元特异性烯醇化酶(NSE)、泛素羧基端水解酶(UCH-L1)、神经胶质纤维酸性蛋白(GFAP)的影响。方法:按照随机数字表法将2021年3月~2022年12月我院收治的112例行微创钻孔置管引流术的高血压脑出血术后患者分为对照组(n=56,接受常规康复训练)和观察组(n=56,对照组基础上结合高压氧干预)。对比两组量表评分[日常生活能力量表-改良Barthel指数(MBI)、Fugl-Meyer运动功能评定量表(FMA)、美国国立卫生研究院卒中量表(NIHSS)]、脑血管动力学指标[平均血流量(Qmean)、外周阻力(R)、平均血流速度(Vmean)]、血管内皮功能[内皮素-1(ET-1)、一氧化氮(NO)]、血清NSE、UCH-L1、GFAP水平以及不良反应发生情况。结果:与对照组干预后相比,观察组MBI、FMA评分更高,NIHSS评分更低(P0.05)。结论:康复训练联合高压氧干预高血压脑出血术后患者,可有效改善脑血管动力学、血管内皮功能和血清NSE、UCH-L1、GFAP水平,减轻神经功能损伤,提高生活自理能力。

关键词：康复训练高压氧高血压脑出血脑血管动力学血管内皮功能 NSE UCH-L1 GFAP

Prevention program for the COVID-19 in a children’s digestive endoscopy center

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World Journal of Clinical Cases 2020年第8期8卷 1343-1349页

作者： Xiao-Peng Ma Huan Wang Da-ming Bai yu Zou Shao-ming Zhou Fei-Qiu Wen Dong-Ling Dai Digestive Endoscopy Center Department of GastroenterologyShenzhen Children's HospitalShenzhen 518036Guangdong ProvinceChina Pediatric Committee of Shenzhen Medical Association Shenzhen 518036Guangdong ProvinceChina Shenzhen Pediatric Medical Quality Control Center Shenzhen 518036Guangdong ProvinceChina

The pneumonia caused by the coronavirus disease-2019(COVID-19)outbreak in Wuhan,China constitutes a public health emergency of international *** gastrointestinal symptoms of vomiting,diarrhea and abdominal pain and the detection of COVID-19 nucleic acid from fecal specimens in a small number of patients suggest the possibility of transmission via the gastrointestinal *** of all ages are vulnerable to this virus,including *** endoscopy is an invasive procedure during which children cannot wear masks;therefore,they have higher risks of exposure to COVID-19,and the digestive endoscopy center is a relatively high-risk area for COVID-19 *** on these factors and in combination with related policies and regulations,a prevention and control program for the COVID-19 pneumonia in a children's digestive endoscopy center was established to prevent the COVID-19 nosocomial infection.

关键词： Digestive endoscopy Disinfection COVID-19 Nosocomial infection Pediatrics Prevention

Influence of Phosphate on Transformation and Plant Uptake of Cadmium in Cd-amended Soils

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Pedosphere 1991年第1期1卷 63-72页

作者： XIONGLI－ming LURU－kun InstituteofSoilScience AcademiaSinicaP.O.Box821Nanjing（China） InstituteofSoilScience AcademiaSinica

Phosphate was found to have neither influence on Cd transformation nor effect on plant Cd uptake in three Cd-amended upland ***,on submerged red earth,high phosphate dressing inhibited the transformation of Cd from exchangeable fraction to other lower-available *** uptake by rice plants increased simultaneously with increasing phosphate supply though plant resistance to Cd also increased at high phosphate *** of phosphate as an amendment for Cd-contaminated soil was therefore not recommended in view of the increasing influx of Cd into food chain especially on flooded soils.

关键词： cadmium phosphate plant uptake soil pollution.transformation

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火力发电企业集中供冷站建设

节能 2024年第5期43卷 111-113页

作者：邓毅琨普飞高明刘双臣赵虎军段丽国能开远发电有限公司云南开远661601 国能龙源蓝天节能技术有限公司北京100039

西南某火电厂通过调研周边食品加工企业的冷库用冷需求提出集中供冷方案。将制冷装置的压缩机和其他辅助设备集中放置于厂内独立的专用机房,建设集中供冷站,利用间接制冷循环系统,通过载冷剂将冷负荷送至分散的各个冷用户。研究表明,集... 详细信息

西南某火电厂通过调研周边食品加工企业的冷库用冷需求提出集中供冷方案。将制冷装置的压缩机和其他辅助设备集中放置于厂内独立的专用机房,建设集中供冷站,利用间接制冷循环系统,通过载冷剂将冷负荷送至分散的各个冷用户。研究表明,集中供冷站可以实现自动控制、远程监控功能,具有厂用电成本优势,减少了用户设备投资及维护成本的吸引力。

关键词：火电厂集中供冷站间接制冷载冷剂

面向监视侦查的光电探测场景仿真系统总体设计

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激光与红外 2019年第9期49卷 1100-1107页

作者：于鲲丛明煜哈尔滨工业大学航天学院空间光学工程研究中心

现有仿真设计软件功能还难以满足空天地一体化光电探测系统总体设计的需求,迫切需要开发一套光电探测场景仿真设计软件。通过对光电探测场景组成要素、探测链路与任务模式的分析,规划了仿真系统结构、功能与关键技术,设计了面向对象的... 详细信息

现有仿真设计软件功能还难以满足空天地一体化光电探测系统总体设计的需求,迫切需要开发一套光电探测场景仿真设计软件。通过对光电探测场景组成要素、探测链路与任务模式的分析,规划了仿真系统结构、功能与关键技术,设计了面向对象的数据结构属性方法与仿真计算流程,在VS2010+QT5.4环境下开发了光电探测场景仿真系统的基础版本。给出了美国STSS天基红外监视系统中段目标探测任务仿真实例计算结果和笔者团队的光电探测仿真技术主要应用成果。

关键词：计算机仿真光电探测监视侦查总体设计成像仿真面向对象

THREE-DIMENSIONAL PAIRING OF COHERENT STRUCTURES IN A PLANE MIXING LAYER

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Journal of Hydrodynamics 2002年第2期14卷 1-6页

作者： Lin, Jian-Zhong Shi, Xing yu, Zhao-Sheng Shao, Xue-ming Dept. of Mech. Lab. of Fluid Power Trans. Zhejiang Univ. Hangzhou 310027 China

The three-dimensional (3D) pairing process of coherent structures in a plane mixing layer was simulated numerically with the pseudo-spectral method. The behaviors of spanwise cup-shaped vortices, streamwise rib-shaped vortices and quadrupoles were obtained in terms of their iso-surfaces. The results show that three-dimensional structures are strongly influenced by the initial amplitude of the 3D disturbance, and that in most cases the local pairing finishes in a roughly two-dimensional manner. In pairing region, the streamwise vortices are chaotic after pairing due to the breakdown of the engulfed ribs and especially the subsequent breakdown of the quadrupoles. The surviving ribs extend to the top (or bottom) of the paired vortices under the stretch of them. In addition, it is revealed that three dimensional vortices pairing can enhance the mixing of fluid. Finally, some patterns of numerical flow visualization are presented by computing the passive scalar.

关键词： Flow of fluids Flow visualization Mixing Numerical analysis Three dimensional

Tryptophan Modification and Fluorescence Spectrum of Hyaluronidase

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Chinese Chemical Letters 2005年第11期16卷 1492-1494页

作者： Li Rong TENG yu Zhuo CHU Xiao Ping ZHANG Xiao kun yu Jing WANG Song HAN Bo Xun ZHANG Hao FAN Lan Ying LIU College of Life Science Jilin University Changchun 130023

Tryptophan residues in hyaluronidase （HAase） were modified by N-bromosuccinimide （NBS）, the results indicated that there were eleven tryptophan residues in HAase, one of which was exposed and essential for the activity of the enzyme. The study on fluorescence quenching showed that KI could not quench all of the fluorescence from Trp residues in HAase, while acrylamide （Acr） could quench almost all of the fluorescence from Trp residues in HAase. The collisional quenching constants （KD） of HAase at different concentrations of Acr were calculated in terms of Stern-Volmer equation. The results implied that some of the Trp residues were buried in the interior of HAase and the Trp residue on the surface of HAase was not located in the hydrophobic pocket.

关键词： Hyaluronidase (HAase) tryptophan (Trp) fluorescence spectrum.