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Miniaturized power detection module operating in millimeter wave band

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Journal of Electronic Science and Technology 2024年第2期22卷 69-76页

作者： Xiang Zhou zhi-yong zhong School of Electronic Science and Engineering University of Electronic Science and Technology of ChinaChengdu611731China

The miniaturized broadband detection module can be embedded into the microwave application system such as the front end of the transmitter to detect the power or other parameters in real *** is highly prospective in military and scientific *** this paper,a broadband power detection module operating at 26.5 GHz-40.0 GHz is designed by using low-barrier Schottky diode as the detector and a comparator for threshold *** module can dynamically detect the power range between-10 dBm and 10 dBm with the detection accuracy of 0.1 ***,the temperature compensation circuit is also applied to improve the measurement *** a result,the resulted error low to±1 dB in the temperature range of -55℃ to +85℃ is *** designed module is encapsulated by a Kovar alloy with a small volume of 9 mm×6 mm×3 *** endows the designed module the advantages of small size,easy integration,and low cost,and even it is applicable to high-reliability environments such as satellites.

关键词： Diode Miniaturization Power detection Temperature compensation

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新交泰饮对2型糖尿病大鼠糖脂代谢的影响

中国药物经济学 2024年第3期19卷 37-41,45页

作者：罗兰张镖曹颖男钟志勇张素中广州新华学院药学院广州510520 珠海百试通生物科技有限公司广东珠海519090

目的探讨新交泰饮对2型糖尿病大鼠血糖血脂的影响。方法采用高糖高脂饲料喂养联合小剂量注射链脲佐菌素(STZ)法建立2型糖尿病大鼠模型,将其分为正常组、模型组、二甲双胍组(100 mg/kg)及新交泰饮低(5.94 g/kg)、中(11.88 g/kg)、高(17.8... 详细信息

目的探讨新交泰饮对2型糖尿病大鼠血糖血脂的影响。方法采用高糖高脂饲料喂养联合小剂量注射链脲佐菌素(STZ)法建立2型糖尿病大鼠模型,将其分为正常组、模型组、二甲双胍组(100 mg/kg)及新交泰饮低(5.94 g/kg)、中(11.88 g/kg)、高(17.82 g/kg)剂量组,每组8只。连续灌胃4周,每周测定空腹血糖(FGB),给药结束后,检测各组大鼠葡萄糖耐量(OGTT)及血清胰岛素(INS)、总胆固醇(TC)、三酰甘油(TG)、低密度脂蛋白胆固醇(LDL-C)、高密度脂蛋白胆固醇(HDL-C)、天冬氨酸转氨酶(AST)、丙氨酸转氨酶(ALT)、肿瘤坏死因子-α(TNF-α)和白细胞介素6(IL6)等各项指标。结果新交泰饮组中剂量组在降低FGB和OGTT水平方面较二甲双胍组弱(P<0.05),但在增加INS分泌和降低TC、TG、LDL-C水平方面较二甲双胍组强(P<0.05)。结论新交泰饮可以降低2型糖尿病大鼠的血糖水平,其调控作用可能与维护糖耐量、促进胰岛素分泌和改善血脂代谢有关。

关键词：新交泰饮 2型糖尿病大鼠血糖血脂

15种岭南中草药抑制新冠假病毒感染细胞的药效筛选研究

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中国处方药 2024年第9期22卷 41-43页

作者：章晶王祥红钟志勇陈登科珠海市食品药品检验所广东珠海519000 珠海临湾堂科技有限公司广东珠海519000 珠海百试通生物科技有限公司广东珠海519000 珠海井上草堂中医药研究院广东珠海519000

目的筛选防治新型冠状病毒感染(COVID-19)的岭南特色中草药。方法通过荧光素酶发光检测技术,采用假病毒中和药效实验方法,对15种岭南地区特有中草药进行筛选并评估。结果草药降真香展示出较为明显的中和病毒作用,其抑制率为(83.6±4.0)%... 详细信息

目的筛选防治新型冠状病毒感染(COVID-19)的岭南特色中草药。方法通过荧光素酶发光检测技术,采用假病毒中和药效实验方法,对15种岭南地区特有中草药进行筛选并评估。结果草药降真香展示出较为明显的中和病毒作用,其抑制率为(83.6±4.0)%,草药山大颜与布渣叶有轻度的中和病毒作用,抑制率分别为(46.1±3.2)%、(58.7±5.9)%,其他草药则未表现出明显的中和病毒作用。结论岭南特色道地中药材在COVID-19的临床防治中具有潜在的应用价值,本研究结果为进一步的药物筛选和临床用药提供参考依据。

关键词：岭南中草药新型冠状病毒假病毒中和实验

华北大黑鳃金龟生物钟基因HoPer的克隆和表达模式分析

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环境昆虫学报 2024年第2期46卷 471-479页

作者：谢明惠钟永志林璐璐张光玲苏卫华倪皖莉陈浩梁安徽省农业科学院植物保护与农产品质量安全研究所合肥230001 安徽省农业科学院作物研究所合肥230001

为明确华北大黑鳃金龟Holotrichia oblita周期蛋白基因(Period,Per)的表达模式,本研究采用RACE技术从2龄幼虫中克隆到生物钟基因HoPer,并进行生物信息学分析;再采用RT-qPCR技术检测HoPer在不同发育阶段、雌雄成虫不同组织以及不同光周... 详细信息

为明确华北大黑鳃金龟Holotrichia oblita周期蛋白基因(Period,Per)的表达模式,本研究采用RACE技术从2龄幼虫中克隆到生物钟基因HoPer,并进行生物信息学分析;再采用RT-qPCR技术检测HoPer在不同发育阶段、雌雄成虫不同组织以及不同光周期下的表达水平。结果表明:HoPer编码1 172个氨基酸,蛋白分子量129.67 kDa,等电点为5.62。HoPer推导出的氨基酸序列中具有2个PAS和1个Period C结构域,是昆虫PER蛋白的典型结构特征。表达模式分析得出:HoPer在各个发育阶段均有表达,但在卵中的表达量显著高于其他发育时期;HoPer在雌雄成虫的头和触角中表达水平最高,其次为翅和足,在胸和腹中表达水平最低;雌雄成虫中HoPer在试验设定的5个光周期中未发现明显的表达差异。本研究为进一步阐明华北大黑鳃金龟HoPer基因功能以及其在生物钟网络中的调控作用提供了一定的参考。

关键词：华北大黑鳃金龟生物钟基因 per 昼夜节律

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Design of high Isolation benzocyclobutene microring resonator

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Optoelectronics Letters 2007年第5期3卷 356-358页

作者： ZHANG Li-xun LIU yong-zhi OU zhong-hua DAI zhi-yong PENG Zeng-shou School of Optoelectronic Information University of Electronic Science and Technology of China Chengdu 610054 China

We report the design of benzocyclobutene microring resonator of symmetric coupling made of a readily available polymer with a higher isolation of 43.8 dB, a finesse of 34, and a Q value of 1.5×105. The FDTD method pr... 详细信息

关键词：共振器耦合模式隔离度 FDTD

Charge Transport and Electrical Properties in Poly(3-hexylthiophene) Polymer Layers

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Chinese Physics Letters 2012年第1期29卷 216-219页

作者： WANG Li-Guo ZHANG Huai-Wu TANG Xiao-Li LI Yuan-Xun zhong zhi-yong State Key Laboratory of Electronic Thin Films and Integrated Devices University of Electronic Science and Technology of ChinaChengdu 610054

A systematic study of the charge transport and electrical properties in poly(3-hexylthiophene) (P3HT) polymer layers is *** demonstrate that the temperature-dependent current-voltage J (V,T) characteristics of hole-only devices based on P3HT can be accurately described using the recently introduced extended Gaussian disorder model (EGDM).A particular numerical method adopting the uneven discretization and Newton iteration method is used to solve the coupled equations describing the space-charge limited (SCL) current in conjugated *** the polymer studied,we find the width of the density of states σ =0.1 eV and the lattice constant a =*** on the numerical method and EGDM,we further calculate and analyze some important electrical properties for P3HT in detail,including the variation of current-voltage characteristics with the boundary carrier density and the distribution of charge-carrier density and electric field with the distance from interface.

关键词： charge Electrical electrical

Laparoscopic splenectomy： color Doppler flow imaging for preoperative evaluation

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Chinese Medical Journal 2009年第10期122卷 1203-1208页

作者： XU Wei-li LI Suo-lin WANG Yan SHI Bao-jun LI Meng LI Ying-chao zhong zhi-yong LI Zhen-dong Department of Pediatric Surgery Second Hospital of Hebei Medical University Shijiazhuang Hebei 050000 China Department of Ultrasound Second Hospital of Hebei Medical University Shijiazhuang Hebei 050000 China

Background Laparoscopic splenectomy （LS） is currently the standard approach for resection of a normal-sized spleen. However, this method becomes technical challenge in cases of splenomegaly due to intraoperative hemorrhage. A complete understanding of the splenic vessel anatomy is important to facilitate the difficult laparoscopic procedure. In this retrospective study, we examined the role of color Doppler flow imaging （CDFI） in splenic vessel anatomy and evaluated its value for LS. Methods Forty-eight patients who underwent splenectomy for various hematologic and autoimmune disorders from May 2004 to December 2007 were enrolled in this study. Twenty-three patients underwent preoperative CDFI examination that included examination of the anatomic type of splenic pedicle, the adjacent relationship between the splenic vessel and pancreas, and spleen size （CDFI group）. In the remaining 25 patients, ultrasonic inspections of the splenic vessel were not performed （non-CDFI group）. Laparoscopic splenectomies in the CDFI group were performed in accordance with the information provided by the preoperative CDFI in each patient. In the non-CDFI group, LS was performed according to the conventional method. In the CDFI group, the constituent ratios of the above-mentioned parameters by CDFI were compared with those recorded during LS using the chi square test. The effectiveness of the technique on surgery in both groups was compared with an independent sample Student＇s ttest. Results All laparoscopic splenectomies in both groups were performed successfully. However, 2 cases in the non-CDFI group were converted to LS with the assistance of micro-incision because the branches of the splenic vein were inadvertently torn. Two anatomic types of splenic pedicle and four different adjacent relationships between the splenic vessel and pancreas were detected by CDFI. About 80% of spleens fit the criteria of megalosplenia. There were no statistically significant differences between th

关键词： laparoscopy splenectomy surgery ultrasonography, Doppler, color

Electrical characteristics of a fractional-order 3×n Fan network

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Communications in Theoretical Physics 2024年第4期76卷 176-187页

作者： zhi-zhong Tan Xin Wang Department of Physics Nantong UniversityNantong 226019China

In this article a new achievement of fractional-order 3×n Fan networks is *** the first step,the RT-I method is used to derive the general formulae of the equivalent impedance of fractional-order 3×n Fan *** the second part,the effects of five system parameters(L,C,n,α and β)on amplitude-frequency and phase-frequency characteristics are *** the same time,the amplitude-frequency and phase-frequency characteristics of the fractional order 3×n Fan network are revealed by Matlab *** work has important theoretical and practical significance for resistor network models in the field of natural science and engineering technology.

关键词： fractional-order circuit amplitude-frequency characteristics phase-frequency characteristics RT-V theory

Double Glow Plasma Surface Alloyed Burn-resistant Titanium Alloy

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材料热处理学报 2004年第5B期25卷 671-673页

作者： ZHANGPing-ze XUzhong HEzhi-yong ZHANGGao-hui TaiyuanUniversityofTechnology TaiyuanShanxi030024P.R.China

Conventional titanium alloy may be ignited and burnt under high temperature, high pressure and high gas flow velocity condition. In order to avoid this problem, we have developed a new kind of burn-resistant titanium alloy—double glow plasma surface alloying burn-resistant titanium alloy. Alloying element Cr , Mo, Cu are induced into the TJ-6A1-4V and Ti-6.5Al-0.3Mo-l.5Zr-0.25Si substrates according to double glow discharge phenomenon, Ti-Cr ,Ti-Mo, Ti-Cu binary burn-resistant alloy layers are formed on the surface of Ti-6Al-4V and Ti-6.5Al-0.3Mo-l.5Zr-0.25Si alloys. The depth of the surface burn-resistant alloy layer can reach to above 200 microns and alloying element concentration can reach 90%. Burn-resistant property experiments reveal that if Cr concentration reach to 14%, Cu concentration reach to 12%, Mo concentration reach to 10% in the alloying layers, ignition and burn of titanium alloy can be effectively avoided.

关键词：表面铸合抗烧性钛合金热处理双重辉光放电