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Tunable circularly-polarized turnstile-junction mode converter for high-power microwave applications

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Chinese Physics B 2018年第6期27卷 502-506页

作者： Xiao-yu Wang yu-wei fan Ting Shu Cheng-wei yuan Qiang Zhang （College of Advanced Interdisciplinary Studies National University of Defense Technology Changsha 410073 China

Frequency tunability has become a subject of concern in the field of high-power microwave（HPM） source ***, little information about the corresponding mode converter is available. A tunable circularly-polarized turnstilejunction mode converter（TCTMC） for high-power microwave applications is presented in this paper. The input coaxial TEM mode is transformed into TE（10） mode with different phase delays in four rectangular waveguides and then converted into a circularly-polarized TE（11） circular waveguide mode. Besides, the rods are added to reduce or even eliminate the reflection. The innovations in this study are as follows. The tunning mechanism is added to the mode converter, which can change the effective length of rectangular waveguide and the distance between the rods installed upstream and the closest edge of the rectangular waveguide, thus improving the conversion efficiency and bandwidth. The conversion efficiency of TCTMC can reach above 98% over the frequency range of 1.42 GHz–2.29 GHz, and the frequency tunning bandwidth is about 47%. Significantly, TCTMC can obtain continuous high conversion efficiency of different frequency points with the change of tuning mechanism.

关键词： mode converter high conversion efficiency frequency tuning performance

Infragravity waves with internal wave characteristics in the south of the Bohai Sea of China

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Acta Oceanologica Sinica 2003年第2期22卷 171-178页

作者： fan Zhisong, Gao Guoping, Yin Xunqiang, fan yu, Wu wei Marine Environment College,Ocean University of China,Qingdao 266003, China Marine Environment College Ocean University of China Qingdao 266003 China

The measurements by using ADCP (500 KH) and CTD were made during August 2000in the south (37?5'N, 120?5'E) of the Bohai Sea, where the water depth was about 16.5 m. The data of horizontal velocity with sampling interval of 2 min in 7 layers were obtained. The power spectrum analysis of these data indicates that there are very energetic infragravity waves with a period of about 6 min. The coherence spectrum analysis and the analysis of temporal variation of shear show that these infragravity waves are mainly the free wave model (properties of edge waves), in the meantime they possess some characteristics of internal waves, which are likely due to the distinctive marine environment in this area. It is speculated on that the instability processes (chiefly shear instability) of sheared stratified tidal flow owing to the effect of sea-floor slope in the coastal area might be the main mechanism generating these infragravity waves.

关键词： Infragravity waves edge waves internal waves vertical shear of horizontal velocity internal mixing

Promise and challenges of traditional Chinese medicine,specifically Calculus bovis,in liver cancer treatment

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World Journal of Gastroenterology 2024年第40期30卷 4380-4385页

作者： Ao-Xi Xu Zhi-Feng Zhao Li Zhu Yi-Heng Zhang Yan Li yu-fan wei Bo-Ya Zhang Bin Jiang Tian-Ze Gao Meng-Si Li Jia-yu Liu School of Medicine Nankai UniversityTianjin 300071China Department of General Surgery The First Medical Center of Chinese People's Liberation Army General HospitalBeijing 100853China Medical School of Chinese People's Liberation Army Medical School of Chinese People's Liberation ArmyBeijing 100853China Department of Hepatobiliary and Pancreative Surgery The First Medical CenterChinese People's Liberation Army General HospitalBeijing 100853China Department of Surgery Mancheng District People's HospitalBaoding 072150Hebei ProvinceChina Department of Neurosurgery First Medical Centre of Chinese People's Liberation Army General HospitalBeijing 100853China

Liver cancer,one of the most common malignancies worldwide,ranks sixth in incidence and third in *** cancer treatment options are diverse,inclu-ding surgical resection,liver transplantation,percutaneous ablation,transarterial chemoembolization,radiotherapy,chemotherapy,targeted therapy,immuno-therapy,and traditional Chinese medicine(TCM).A multidisciplinary team(MDT)is essential to customize treatment plans based on tumor staging,liver function,and performance status(PS),ensuring individualized patient *** decisions require a MDT to tailor strategies based on tumor staging,liver function,and PS,ensuring personalized *** approval of new first-line and second-line drugs and the establishment of standard treatments based on immune checkpoint inhibitors have significantly expanded treatment options for advanced liver cancer,improving overall ***,many patients do not respond effectively to these treatments and ultimately succumb to the *** oncology treatments,while extending patient survival,often come with severe side effects,resistance,and damage to the body,negatively impacting quality of *** et al's study published at World Journal of Gastroenterology rigorously validates the anticancer properties of Calculus bovis,enhancing our understanding of TCM and contributing to new liver cancer treatment *** over 5000 years,TCM has been used in East Asian countries like China to treat various diseases,including liver *** of real-world clinical data suggests that for patients with advanced-stage tumors lacking effective treatments,integrated TCM therapies could provide significant breakthroughs.

关键词： Traditional Chinese medicine Liver cancer Calculus bovis Treatment Promise Challenges

Effects of buried penis on the structure and function of corpus cavernosum in a rat model

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Chinese Medical Journal 2010年第13期123卷 1736-1740页

作者： CHENG fan yu wei-min XIA yue ZHANG Xiao-bin YANG Si-xing GE Ming-huan Department of Urology Renmin Hospital of Wuhan University Wuhan Hubei 430060 China

Background While the abnormal appearance of the concealed penis has been well recognized, the effect of buried penis on the structure and function of corpus cavernosum has not been well studied. To explore this issue, we established a rat model and evaluated the effect of buried penis on cavernosum weight, contents and ultrastructure of tissue, and nitric oxide synthase （NOS） activity. Methods Two hundred and ten rats were randomly divided into 3 equal cohorts for 2, 4 and 6 months study （groups A, B and C）. Each group was randomly divided into buried group （n=40）, control group （n=15）, and normal group （n=15）, respectively. Intra-purse-string suture of the root of the penis was used to establish the model. Macroscopic development was judged by measuring the weight of the corpus cavernosum. Masson＇s trichrome staining was performed for observing microstructure while a transmission electron microscope was used for observing ultrastructure. The NOS activity was detected by a NOS activity assay kit. Results Buried penis had no significant influence on the appearance and weight of the corpus cavernosum. Buried penis resulted in decreased smooth muscle content （P 〉0.05 in group A, and P 〈0.05 in groups B and C） and increased fibrous connective tissue content （P 〉0.05 in groups A and B, and P 〈0.05 in group C） compared with the normal and control groups. Ultrastructural abnormalities of corpus cavernosum were observed in the 6-month buried group. Moreover, there was decrease of NOS activity in groups B and C （P 〈0.05 in group B and P 〈0.01 in group C） when compared with the normal and control groups. Conclusion Buried penis affects the structure and function of corpus cavernosum in rats and the effect is positively correlated with the buried time, but there is no significant effect on the macroscopic development.

关键词： buried penis corpus cavernosum structure function

马鞭草总黄酮对四氯化碳致小鼠急性肝损伤的影响

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医药导报 2013年第10期32卷 1289-1292页

作者：于伟凡漯河医学高等专科学校漯河462002

目的研究马鞭草总黄酮对四氯化碳致小鼠急性肝损伤的治疗作用。方法 60只小鼠随机分成正常组,模型组,阳性对照组,马鞭草总黄酮低、中、高剂量组,每组10只。正常组和模型组灌胃给予等体积0.9%氯化钠溶液,马鞭草总黄酮低、中、高剂量组和... 详细信息

目的研究马鞭草总黄酮对四氯化碳致小鼠急性肝损伤的治疗作用。方法 60只小鼠随机分成正常组,模型组,阳性对照组,马鞭草总黄酮低、中、高剂量组,每组10只。正常组和模型组灌胃给予等体积0.9%氯化钠溶液,马鞭草总黄酮低、中、高剂量组和阳性对照组分别灌胃给予马鞭草总黄酮(50,100,200 mg·kg-1)和联苯双酯(200 mg·kg-1),qd,连续10 d。末次给药1 h后,除正常对照组,其余各组腹腔注射0.15%四氧化碳(5 mL·kg-1),24h后测定血清中丙氨酸氨基转移酶(ALT),天冬氨酸氨基转移酶(AST)的活性和白细胞介素(IL)-6,肿瘤坏死因子(TNF)-α,IL-8的含量以及肝脏指数、脾脏指数、胸腺指数,检测肝组织核转录因子(NF-κB)p65的表达和超氧化物歧化酶(SOD),谷胱甘肽过氧化物酶(GSH-Px),过氧化氢酶(CAT)的活性,丙二醛(MDA),一氧化氮(NO)的含量。结果马鞭草总黄酮高、中剂量能降低血清中ALT、AST的活性(P<0.01),降低肝脏指数、脾脏指数、胸腺指数(P<0.05或P<0.01),抑制肝组织NF-κB p65的表达并降低血清中IL-6,TNF-α,IL-8的含量(P<0.05或P<0.01),升高肝组织中SOD,GSH-Px,CAT的活性,降低MDA,NO的含量(P<0.05或P<0.01)。结论马鞭草总黄酮对四氧化碳所造成的肝细胞的损伤具有较好的改善和保护作用,减少炎症的渗出,降低氧化损伤程度。

关键词：马鞭草总黄酮四氯化碳损伤肝急性生化指标

Study on HPM Power Measurement by Dipole Aatenna

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Chinese Physics C 2008年第Z1期32卷 307-309页

作者：周恒樊玉伟舒挺国防科学技术大学光电科学与工程学院长沙410073

In order to reduce the gain of a receiving antenna in HPM power measurement,especially in lower frequency, a low gain dipole antenna of L band is *** theoretical analysis and numerical simulation,the optimized results of the antenn are obtained:its central frequency is 1.75GHz,the variety of gain is less than 1.1dB in frequency band 1.70—1.80GHz,the estimated value of the power capacity of the antenna is 0.1MW,which can satisfy the demand of corresponding measurement.

关键词： HPM dipole attenna gain power capacity

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测定大气等密度层倾斜的方法

天文学报 1993年第4期34卷 405-410页

作者：范瑜冒蔚中国科学院云南天文台昆明650011

本文简述了大气等密度层倾斜对天体测量观测结果的影响.根据低纬子午环绝对测定瞬时大气折射的原理,提出了利用子午方向和卯酉方向交替观测,测定大气等密度层倾斜的方法推导了解算倾斜量的公式,并对测定精度作了估计.

关键词：大气折射等密度层低纬子午环

Dynamic Regulation of Hydrogen Bonding Networks and Solvation Structures for Synergistic Solar‑Thermal Desalination of Seawater and Catalytic Degradation of Organic Pollutants

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Nano-Micro Letters 2025年第2期17卷 548-565页

作者： Ming‑yuan yu Jing Wu Guang Yin fan‑Zhen Jiao Zhong‑Zhen yu Jin Qu Beijing Key Laboratory of Advanced Functional Polymer Composites Beijing University of Chemical TechnologyBeijing 100029People’s Republic of China State Key Laboratory of Organic‑Inorganic Composites College of Materials Science and EngineeringBeijing University of Chemical TechnologyBeijing 100029People’s Republic of China

Although solar steam generation strategy is efficient in desalinating seawater,it is still challenging to achieve continuous solar-thermal desalination of seawater and catalytic degradation of organic ***,dynamic regulations of hydrogen bonding networks and solvation structures are realized by designing an asymmetric bilayer membrane consisting of a bacterial cellulose/carbon nanotube/Co_(2)(OH)_(2)CO_(3)nanorod top layer and a bacterial cellulose/Co_(2)(OH)_(2)CO_(3)nanorod(BCH)bottom ***,the hydrogen bonding networks inside the membrane can be tuned by the rich surface–OH groups of the bacterial cellulose and Co_(2)(OH)_(2)CO_(3)as well as the ions and radicals in situ generated during the catalysis ***,both SO_(4)^(2−)and HSO_(5)−can regulate the solvation structure of Na^(+)and be adsorbed more preferentially on the evaporation surface than Cl^(−),thus hindering the de-solvation of the solvated Na^(+)and subsequent nucleation/growth of ***,the heat generated by the solar-thermal energy conversion can accelerate the reaction kinetics and enhance the catalytic degradation *** work provides a flow-bed water purification system with an asymmetric solar-thermal and catalytic membrane for synergistic solar thermal desalination of seawater/brine and catalytic degradation of organic pollutants.

关键词： Solar steam generation Seawater desalination Catalytic degradation Bacterial cellulose Cobalt hydroxycarbonate nanorods

基于匀压力驱动管加载的管件电磁胀形电磁力与成形特性分析

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塑性工程学报 2022年第5期29卷 98-108页

作者：邱立李玉田张望范雨薇瞿宏森三峡大学电气与新能源学院湖北宜昌443002 梯级水电站运行与控制湖北省重点实验室湖北宜昌443002 国网河北省电力有限公司邢台供电分公司河北邢台054000 广东南海电力设计院工程有限公司广东佛山528200

为了削弱端部效应,提高管件轴向变形均匀度,提出一种基于匀压力驱动管加载的管件电磁胀形方法。介绍了管件电磁胀形和集磁器基本工作原理,利用COMSOL商用软件建立了电磁-结构耦合有限元模型,研究了不同驱动管高度、驱动管和管件高度比... 详细信息

为了削弱端部效应,提高管件轴向变形均匀度,提出一种基于匀压力驱动管加载的管件电磁胀形方法。介绍了管件电磁胀形和集磁器基本工作原理,利用COMSOL商用软件建立了电磁-结构耦合有限元模型,研究了不同驱动管高度、驱动管和管件高度比下管件的电磁力分布和变形行为。结果表明,采用匀压力驱动管加载时,轴向变形最大均匀区域由8.9 mm增加至34 mm,增加了近3倍。通过仿真分析,验证了匀压力驱动管的引入可以有效解决管件电磁胀形轴向变形不均匀的问题,对管件和驱动管高度进行了合理设计,有效抑制了管件成形过程中的壁厚减薄问题。

关键词：电磁胀形端部效应电磁力轴向变形均匀度

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