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Scavenging Microwave Wireless Power:A Unified Model,Rectenna Design Automation,and Cutting-Edge Techniques

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Engineering 2023年第11期30卷 32-48页

作者： Si-Ping Gao Jun-hui ou Xiuyin Zhang Yongxin Guo Department of Electrical and Computer Engineering National University of SingaporeSingapore 117576Singapore School of Electronic and Information Engineering South China University of TechnologyGuangzhou 510641China School of Future Technology South China University of TechnologyGuangzhou 511442China

While sufficient review articles exist on inductive short-range wireless power transfer(WPT),long-haul microwave WPT(MWPT)for solar power satellites,and ambient microwave wireless energy harvesting(MWEH)in urban areas,few studies focus on the fundamental modeling and related design automation of receiver *** article reviews the development of MWPT and MWEH receivers,with a focus on rectenna design automation.A novel rectifier model capable of accurately modeling the rectification process under both high and low input power is *** model reveals the theoretical boundary of radio frequency-to-direct current(dc)power conversion efficiency and,most importantly,enables an automated system *** automated rectenna design flow is sequential,with the minimal engagement of iterative *** covers the design automation of every module(i.e.,rectifiers,matching circuits,antennae,and dc–dc converters).Scaling-up of the technique to large rectenna arrays is also possible,where the challenges in array partitioning and power combining are briefly *** addition,several cutting-edge rectenna techniques for MWPT and MWEH are reviewed,including the dynamic range extension technique,the harmonics-based retro-directive technique,and the simultaneous wireless information and power transfer technique,which can be good complements to the presented automated design methodology.

关键词： Microwave wireless power transfer Microwave wireless energy harvesting Unified Rectifier model Automated rectenna design Emerging rectenna techniques

Post-modification engineering of cerium metal-organic frameworks for efficient visible light-driven water oxidation

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Rare Metals 2024年第11期43卷 5802-5812页

作者： Lin-Zhu Zhang Lu Chen Gui-Yang Yan Ruo-Wen Liang Hong-hui ou Fujian Provincial Key Laboratory of Featured Biochemical and Chemical Materials Fujian Province University Key Laboratory of Green Energy and Environment CatalysisNingde Normal UniversityNingde 352100China School of Chemical Engineering and Technology Xi'an Jiaotong UniversityXi'an 710049China

Metal-organic frameworks(MOFs)are highly desirable for promising photocatalytic water splitting,but their practical application is greatly limited due to their unstable chemical properties and insufficient visible light response as well as low charge-carries utilization,especially in photocatalytic O_(2)***,we present a post-modification engineering to modulate cerium metalorganic frameworks(Ce-MOFs)for realizing efficient photocatalytic water oxidation to liberate O_(2)by visible *** one-step partial oxidation strategy is adopted to modify pristine Ce-MOFs,yielding the new Ce-MOFs(MV-Ce-MOFs)with mixed valence of Ce^(3+)/Ce^(4+).Creating the Ce nodes of a mixed valence state can effectively extend the optical absorption to the visible region,expose more catalytically active sites and inhibit the recombination of photoinduced ***,the MV-Ce-MOFs exhibit high activity for photocatalytic O_(2)evolution under visible light,manifesting an impressive1.6%apparent quantum efficiency(AQY)under monochromatic irradiation of 405 *** regulation engineering of MOF metal node valence heralds a new paradigm for designing MOF-based photocatalysts.

关键词： Cerium metal-organic frameworks Partial oxidation Mixed valence Photocatalytic water oxidation Oxygen evolution

Different imaging findings of inflammatory myofibroblastic tumor of the liver

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World Journal of Gastroenterology 2012年第40期18卷 5821-5825页

作者： Xiao-Fei Liu Bao-Ming He Xiao-hui ou-Yang Zhi-Zhong Wang Jia-Gui Su Department of Nuclear Medicine The People's Liberation Army 309th HospitalBeijing 100091China

Inflammatory myofibroblastic tumor(IMT) in the liver is an uncommon lesion of uncertain *** most cases,symptomatological imaging and clinical studies suggest *** report a case of liver IMT with imaging findings from positron emission tomography/computed tomography(PET/CT),contrastenhanced computed tomography(CECT) and contrastenhanced ultrasonography(CEUS).This report was the first to depict a PET/CT scan of a liver IMT that revealed an inhomogeneous,intense(fluorine 18)-fluoro-2-deoxy-D-glucose *** CECT and CEUS images showed a hepatic artery supplying blood to the mass and *** characteristic histopathological features and the presence of spindle cells expressing smooth muscle actin,collagen fibers and lymphocytes allowed for the diagnosis of liver *** such findings will help to achieve a correct diagnosis and may prevent inappropriate treatment.

关键词： Inflammatory myofibroblastic tumor Liver Emission-computed tomography X-ray-computed to-mography

Rapid detection of the known SNPs of CYP2C9 using oligonucleotide microarray

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World Journal of Gastroenterology 2003年第6期9卷 1342-1346页

作者： Si-Yuan Wen hui Wang ou-Jun Sun Sheng-Qi Wang Beijing Institute of Radiation Medicine,Beijing 100850,China Beijing Institute of Radiation Medicine No. 27 Taiping Road Beijing 100850 China. sqwang@***

AIM: Cytochrome P450 2C9 (CYP2C9) is a polymorphic enzyme responsible for the metabolism of a large number of dinically important drugs. Individuals with mutant enzymes may risk serious side effects under routine therapy with certain drugs metabolized by CYP2C9. In order to facilitate the detection of the known SNPs of CYP2C9, an allele-specific oligonucleotide (ASO) based microarray was ***: An oligonucleotide microarray was made to fadlitate the SNP (single nucleotide polymorphism) screening and was applied for the detection of CYP2C9 polymorphism in 62 high blood pressure (HBP) patients who received Irbesartan for treatment. Part of the genotyping results was confirmed by direct sequendng. And the relation between CYP2C9 polymorphism and therapeutic outcome of Irbesartan was statistically ***: Heterozygous alleles of CYP2C9*1/*3 were found in 7 out of 62 subjects. No mutant alleles of CYP2C9*2, *4 and *5 and no homozygous mutant alleles were *** 7 heterozygous CYP2C9*1/*3 and 13 random wild type DNA samples were subjected to direct sequencing with purified PCR products and same genotyping results were obtained with the 20 DNA samples. There was no significant difference in the odds of effectiveness of Irbesartan between the wild type (normal) group and CYP2C9*1/*3 (mutant)group (P>O.05).CONCLUSION: The oligonucleotide microarray made in this study is a reliable assay for detecting the CYP2C9 known alleles and the heterozygous CYP2C9*1/*3 has no significant effects on the therapeutic outcome of Irbesartan.

关键词： CYP2C9 单核苷多态性寡核苷酸微阵列分析等位基因

EXPECTED PRESENT VALUE OF TOTAL DIVIDENDS IN THE COMPouND BINOMIAL MODEL WITH DELAYED CLAIMS AND RANDOM INCOME

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Acta Mathematica Scientia 2013年第6期33卷 1639-1651页

作者：周杰明莫晓云欧辉杨向群 College of Mathematics and Computer Science Key Laboratory of High Performance Computing and Stochastic Information Processing Ministry of Education of ChinaHunan Normal University Department of Mathematics Hunan University of Finance and Economics

In this paper, a compound binomial model with a constant dividend barrier and random income is considered. Two types of individual claims, main claims and by-claims, are defined, where every by-claim is induced by the main claim and may be delayed for one time period with a certain probability. The premium income is assumed to another binomial process to capture the uncertainty of the customer＇s arrivals and payments. A system of difference equations with certain boundary conditions for the expected present value of total dividend payments prior to ruin is derived and solved. Explicit results are obtained when the claim sizes are Kn distributed or the claim size distributions have finite support. Numerical results are also provided to illustrate the impact of the delay of by-claims on the expected present value of dividends.

关键词： compound binomial model main claim by-claim dividend random income

Racemic Bisindole Alkaloids: Structure, Bioactivity, and Computational Study

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Chinese Journal of Chemistry 2021年第9期39卷 2588-2598页

作者： Tian-Yun Jin Ping-Lin Li Ci-Li Wang Xu-Li Tang Mei-Mei Cheng Yuan Zong Lian-Zhong Luo hui-Long ou Ke-Chun Liu Guo-Qiang Li Key Laboratory of Marine Drugs Chinese Ministry of EducationSchool of Medicine and Pharmacy DepartmentOcean University of ChinaQingdaoShandong 266003China Laboratory of Marine Drugs and Biological Products National Laboratory for Marine Science and TechnologyQingdaoShandong 266235China College of Chemistry and Chemical Engineering State-Province Joint Engineering Laboratory of Marine Bioproducts and TechnologyOcean University of ChinaQingdaoShandong 266003China Engineering Research Center of Marine Biopharmaceutical Resource Xiamen Medical CollegeXiamenFujian 361023China College of Ocean and Earth Sciences Xiamen UniversityXiamenFujian 361006China Biology Institute Qilu University of Technology(Shandong Academy of Sciences)JinanShandong 250099China

The new racemic and dimeric in dole alkaloids with the characteristic cyclope nta[b]indole backb one,(+)-and(-)-sp on domi ne(la/lb),were isolated from a cultured sponge Tedania anhelans.A semi-synthesis was employed to obtain la/lb and the other four stereoisomers *** structures were determined by spectroscopic analysis,single-crystal X-ray,and quantum chemical *** stereoisomers differ in bioactivity according to their absolute con ***,(+)-sp on domi ne(la)displayed cytotoxicity against the K562 cell line and exhibited stronger Wnt and HIF1 dual signaling inhibitory activity at 5 pmol/L than the positive control,which offers an exciting starting point for further *** stereoisomers significantly promoted angiogenesis and showed moderate anti-inflammation in zebrafish.A quantum chemical calculation and deuteration experiment were applied to unveil the reacti on mechanism which guides the synthesis of the target compounds.

关键词： Tedania anhelans Alkaloids Cyclopenta[b]indole Biological activity Reaction mechanisms

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在险风险值估计方法的比较研究(英文)

经济数学 2010年第4期27卷 15-21页

作者：欧辉湖南师范大学数学与计算机科学学院湖南长沙410081

金融数据呈现的厚尾性已达成共识。本文首先基于指数回归模型提出了一种厚尾分布的极值分位数估计方法,得到了在险风险值的估计公式。然后得到了上海上证指数、国债指数和企业债券指数的在险风险值的估计值,比较了他们的极值风险.

关键词：厚尾分布在险风险值极值分位数

磺胺嘧啶银脂质水胶敷料治疗小面积皮肤缺损并伤口感染:生物相容性评价

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中国组织工程研究 2015年第21期19卷 3366-3370页

作者：欧卉中国医科大学附属第一医院关节外科及运动医学科辽宁省沈阳市110001

背景:磺胺嘧啶银脂质水胶敷料是两种抗菌药物的结合体,可以发挥局部广谱、强效、持久的抗菌作用,能有效控制并预防伤口感染。目的:观察磺胺嘧啶银脂质水胶敷料治疗皮肤缺损性感染伤口的效果及生物相容性。方法:将30例皮肤缺损合并感染... 详细信息

背景:磺胺嘧啶银脂质水胶敷料是两种抗菌药物的结合体,可以发挥局部广谱、强效、持久的抗菌作用,能有效控制并预防伤口感染。目的:观察磺胺嘧啶银脂质水胶敷料治疗皮肤缺损性感染伤口的效果及生物相容性。方法:将30例皮肤缺损合并感染伤口患者采用随机分组方法分为观察组和对照组,两组均常规清创、换药后,观察组用生理盐水冲洗伤口后使用磺胺嘧啶银脂质水胶敷料覆盖,再以纱布包扎;对照组使用凡士林纱布覆盖后再以纱布包扎。观察两组治疗0,1,2周换药时的目测类比评分、敷料与伤口粘连情况、创面愈合率及痊愈时间。结果与结论:观察组治疗1,2周换药时的目测类比评分显著低于对照组(P<0.01),治疗1,2周换药时的创面愈合率显著高于对照组(P<0.05);观察组换药时敷料与伤口粘连情况明显少于对照组(P<0.01),创面愈合时间明显短于对照组(P<0.05)。表明磺胺嘧啶银脂质水胶敷料治疗皮肤缺损合并感染伤口效果好,可减轻换药时疼痛,有效控制感染,促进伤口愈合。

关键词：生物材料材料相容性磺胺嘧啶银脂质水胶敷料皮肤缺损感染愈合

时刻变换风险模型中的Gerber-Shiu函数

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应用数学学报 2015年第3期38卷 559-567页

作者：陈旭欧辉湖南师范大学数学与计算机学院长沙410081

本文讨论时刻变换的复合泊松风险模型中的Gerber-Shiu函数,首先给出了Gerber-Shiu函数满足的积微分方程,接着引入Laplace变换的对偶变换Elzaki变换,得到了Gerber-Shiu函数的Elzaki变换的具体形式,最后用一个数值例子验证了用Elzaki逆变... 详细信息

本文讨论时刻变换的复合泊松风险模型中的Gerber-Shiu函数,首先给出了Gerber-Shiu函数满足的积微分方程,接着引入Laplace变换的对偶变换Elzaki变换,得到了Gerber-Shiu函数的Elzaki变换的具体形式,最后用一个数值例子验证了用Elzaki逆变换求Gerber-Shiu函数的方法并分析了时刻变换对破产概率的影响.

关键词： Gerber-Shiu函数积微分方程 Elzaki变换 Laplace变换破产概率