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Novel Methodology for Designing Frequency Selective Surfaces with Miniaturized Cells

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Journal of Harbin Institute of Technology(New Series) 2013年第2期20卷 1-6页

作者： Guo-hui Yang Wan-Lu Li Tong Zhang qun Wu Xue-Mai Gu Dept. of Microwave Engineering Harbin Institute of Technology The Fu Foundation School of Engineering and Applied Science Columbia University

Miniaturization of Frequency Selective Surface's ( FSS's) size is significant for its application in the limited space. In this paper, a novel methodology for designing low-profile FSS is discussed, and a corresponding multi-layer structure with lumped elements for band-pass response is presented. Based on the equivalent circuit theory,the inductive designed center layer is firstly discussed. Then different numbers of additional capacitive designed layers are added and their performances are presented. Finally,the lumped elements are added both between adjacent layers and between adjacent cells of the additional layers so that the miniaturization performance can be further improved. The simulations for each structure in waves of different polarizations and incident angles are conducted,and the results are presented,which demonstrate the claimed characteristics of the proposed structure.

关键词： FSS miniaturization multi-layer polarization stability

Effect ofαphase on fatigue crack growth of Ti-6242 alloy

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Journal of Iron and Steel Research International 2017年第8期24卷 811-822页

作者： Hang-wei Zhou hui-qun Liu Dan-qing Yi Yu Xiao Xiao-long Zhao Jian Wang Qi Gao School of Materials Science and Engineering Central South UniversityChangsha 410088HunanChina Key Laboratory of Nonferrous Materials Ministry of EducationCentral South UniversityChangsha 410083HunanChina BAOTI Group Ltd. Baoji 721014ShanxiChina

Fatigue crack growth as a function ofαphase volume fraction in Ti-6Al-2Sn-4Zr-2Mo（Ti-6242）alloy was investigated using fatigue testing,optical microscopy,scanning electron microscopy,and transmission electron ***α＋βannealing treatments with different solid solution temperatures and cooling rates were conducted in order to tailor microstructure with differentαphase features in the Ti-6242 alloy,and fatigue crack growth mechanism was discussed after detailed microstructure *** results showed that fatigue crack growth rate of Ti-6242 alloy decreased with the decrease in volume fraction of the primaryαphase（αp）.Samples with a large-sizedαgrain microstructure treated at high solid solution temperature and slow cooling rate have lower fatigue crack growth *** appearance of secondaryαphase（αs）with the increase of solid solution temperature led to crack ***,a fatigue crack growth transition phenomenon was observed in the Paris regime of Ti-6242 alloy with 29.8% αp（typical bi-modal microstructure）and large-sizedαgrain microstructure,owing to the change of fatigue crack growth mechanism.

关键词： Ti-6242 alloy Microstructure tailoring Fatigue crack growth α phase Fatigue crack growth rate Crack propagation transition

Transformations of particles, metal elements and natural organic matter in different water treatment processes

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Journal of Environmental Sciences 2007年第3期19卷 271-277页

作者： YAN Ming-quan WANG Dong-sheng SHI Bao-you WEI qun-shan QU Jiu-hui tanG Hong-xiao State Key Laboratory of Environmental Aquatic Chemistry Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China

Characterizing natural organic matter （NOM）, particles and elements in different water treatment processes can give a useful information to optimize water treatment operations. In this article, transformations of particles, metal elements and NOM in a pilot-scale water treatment plant were investigated by laser light granularity system, particle counter, glass-fiber membrane filtration, inductively coupled plasma-optical emission spectroscopy, ultra filtration and resin absorbents fractionation. The results showed that particles, NOM and trihalomethane formation precursors were removed synergistically by sequential treatment of different processes. Preozonation markedly changed the polarity and molecular weight of NOM, and it could be conducive to the following coagulation process through destabilizing particles and colloids; mid-ozonation enhanced the subsequent granular activated carbon （GAC） filtration process by decreasing molecular weight of organic matters. Coagulation-flotation and GAC were more efficient in removing fixed suspended solids and larger particles; while sand-filtration was more efficient in removing volatile suspended solids and smaller particles. Flotation performed better than sedimentation in terms of particle and NOM removal. The type of coagulant could greatly affect the performance of coagulation-flotation. Pre-hydrolyzed composite coagulant （HPAC） was superior to FeCl3 concerning the removals of hydrophobic dissolved organic carbon and volatile suspended solids. The leakages of flocs from sand-filtration and microorganisms from GAC should be mitigated to ensure the reliability of the whole treatment system.

关键词： flotation fixed suspended solid trihalomethane formation potential ultra filtration resin absorbent fractionation

Transcriptome-based insights into the calcium transport mechanism of chick chorioallantoic membrane

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Food Science and Human Wellness 2022年第2期11卷 383-392页

作者： qun Huang Ran Yang Qia Wang hui Teng Hongbo Song Fang Geng Peng Luo School of Public Health The Key Laboratory of Environmental Pollution Monitoring and Disease ControlMinistry of EducationGuizhou Medical UniversityGuiyang 550025China College of Food Science Fujian Agriculture and Forestry UniversityFuzhou 350002China Meat Processing Key Laboratory of Sichuan Province School of Food and Biological EngineeringChengdu UniversityChengduSichuan 610106China

Chorioallantoic membrane(CAM)is responsible for respiratory gas exchange,eggshell calcium transport,embryonic acid-base equilibrium,allantoic ion,and water reabsorption during avian embryonic *** further understand the timing of CAM gene expression during chick embryonic development,especially the calcium absorption mechanism,transcriptome quantitative comparative analysis was conducted on chick CAM during the embryonic period(E)of 9,13,17,and 20 days.A total of 6378 differentially expressed genes(DEGs)were *** enrichment analysis of DEGs showed that CAM DEGs were mainly involved in biological processes such as"ion transport regulation","immune response"and"cell cycle".Time series analysis of the differential genes showed that the functional cells of CAM began to proliferate and differentiate at E9 and the calcium content of egg embryo increased significantly at ***,the observation of the ultrastructure of the eggshell showed that the interstice of the fiber layer was enlarged at E13,and the mastoid layer was partly ***,it is preliminarily inferred that CAM calcium transport starts at E13,and genes such as TRPV6,S100 A10,and RANKL cooperate to regulate calcium release and transport.

关键词： Incubation Chorioallantoic membrane Transcriptome Calcium transport

Endogenous phytohormones and the expression of flowering genes synergistically induce flowering in loquat

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Journal of Integrative Agriculture 2020年第9期19卷 2247-2256页

作者： CHI Zhuo-heng WANG Yong-qing DENG qun-xian ZHANG hui PAN Cui-ping YANG Zhi-wu College of Horticulture Sichuan Agricultural UniversityChengdu 611130P.R.China Sichuan Academy of Forestry Chengdu 610081P.R.China

Flowering is an important process for the reproduction of higher *** to this point,the studies on flowering have mostly focused on the model plant Arabidopsis thaliana,and the flowering mechanism of fruit trees remains mostly *** diversity of the flowering time of loquat(Eriobotrya japonica Lindl.)makes it an ideal material to study the regulation of *** this study,we first observed the inflorescence bud differentiation in two varieties of loquat that had different blooming times(***(***),that blooms in the fall and ***(***×Eriobotrya bengalensis Hook.f.)that blooms in the spring)and found that the starting time of inflorescence bud differentiation and the speed of inflorescence development were responsible for the difference in blooming *** determination of endogenous phytohormones by high performance liquid chromatography(HPLC)indicated that abscisic acid(ABA),zeatin(ZT),and gibberellin(GA3)promoted flowering in loquat,while indole-3-acetic acid(IAA)was mainly involved in inflorescence bud differentiation in Chunhua.A transcription level analysis illustrated that multiple flowering-related genes could respond to different signals,integrate to the TFL1,AP1 and FT genes,and then synergistically regulate flowering in ***,this study provides a new insight into flowering regulation mechanisms in loquat.

关键词： loquat inflorescence bud differentiation flowering endogenous hormones gene expression

Application of the hybrid RANS/LES method on the hydraulic dynamic performance of centrifugal pumps

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Journal of Hydrodynamics 2019年第3期31卷 637-640页

作者： Zheng-chuan Zhang Hong-xun Chen Zheng Ma qun Wei Jian-wu He hui Liu Chao Liu Shanghai Institute of Applied Mathematics and Mechanics Shanghai University Shanghai 200072 China Chinese Ship Scientific Research Center Wuxi 214082 China College of Civil Engineering and Architecture Nanchang University Nanchang 330031 China Shanghai Marine Equipment Research Institute Shanghai 200031 China

The nonlinear hybrid RANS/LES method has been developed considering the simulation efficiency and accuracy to simulate the hydraulic dynamic characteristics of the centrifugal pump. It has been proved that the nonlinear hybrid RANS/LES method could effectively capture the unsteady flow structure and pressure pulsation in 2?D centrifugal pumps. To further investigate the hydraulic dynamic performance of a redesigned 3-D-gap drainage centrifugal pump, the nonlinear hybrid RANS/LES method is employed. Both numerical simulation and experimental results show that the hydraulic performance and pressure pulsation characteristics of the 3-D-gap drainage impeller centrifugal pump are significantly enhanced.

关键词： 3-D gap drainage blades nonlinear hybrid RANS/LES method pressure pulsation

Association between retinopathy,nephropathy,and periodontitis in type 2 diabetic patients:a Meta-analysis

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International Journal of Ophthalmology(English edition) 2021年第1期14卷 141-147页

作者： hui-qun Wu Xiao Wei Jin-Yi Yao Jian-Yan Qi hui-Min Xie Ai-Min Sang Kui Jiang Department of Medical Informatics Medical School of Nantong UniversityNantong 226001Jiangsu ProvinceChina Department of Ophthalmology Affiliated Hospital of Nantong UniversityNantong 226001Jiangsu ProvinceChina

AIM:To verify the association between retinopathy,nephropathy,and periodontitis in type 2 diabetic(T2 D)***:Several electronic databases were available for our comprehensive search including China National Knowledge Infrastructure(CNKI),Chinese VIP Information(VIP),Wanfang,Web of Science,ScienceDirect and PubMed and were queried for relevant citations(updated to Mar.2019).RevMan was utilized to perform Meta analysis and publication bias *** evaluation of the methodological quality of included studies,a fixed or random effect model was utilized to analyze data from included ***:A total of eight articles were finally included in this Meta *** all 3987 subjects,there were 1207 T2 D patients accompanying with microvascular complications and 1734 patients with periodontitis as *** Meta forest plot presented little heterogeneity of the eight studies(P<0.00001,I^(2)=89%).The total effect demonstrated periodontitis was associated with overall microvascular complications(OR:1.96,95%CI:1.67-2.30,Z=8.25,P<0.00001).Subgroup investigations among the studies in Asian(OR:2.33,95%CI:1.91-2.85)and North American(OR:1.42,95%CI:1.08-1.86)populations confirmed the existed association between retinopathy,nephropathy,and *** the strength of such associations between periodontitis and diabetic microvascular complications were more obvious in the Asians than North *** the results indicated that periodontitis was associated with diabetic retinopathy(OR:3.77,95%CI:2.71-5.24),diabetic nephropathy(OR:1.55,95%CI:1.24-1.94)in T2 D ***:The periodontitis is associated with diabetic retinopathy,diabetic nephropathy among T2 D patients and further large sample size clinical trials are in need to confirm the findings.

关键词： periodontitis diabetic retinopathy diabetic nephropathy diabetes Meta-analysis

Solvothermal Syntheses and Characterizations of Two New Sliver Selenidoantimonates of Ag_3SbSe_3 and Ag_5SbSe_4~

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Chinese Journal of Structural Chemistry 2016年第2期35卷 227-236页

作者： YUE Cheng-Yang ZHANG hui-Ping LU Xin-Xiu BAI Yi-qun SHI Hao XU Xin Key Laboratory of Inorganic Chemistry in Universities of Shandong Department of Chemistry and Chemical EngineeringJining University

Two new sliver selenidoantimonates,namely,Ag3SbSe3 and Ag5SbSe4,were prepared under mid solvothermal conditions and structurally characterized by single-crystal X-ray diffraction ***3SbSe3 crystallizes in the orthorhombic space group Pnma（No.62） with a =8.2414（12）,b = 11.4925（17）,c = 21.220（3） A,V= 2009.8（5） A^3 and Z= *** structure belongs to the β-Ag3AsSe3 type and features a 3D complex network composed of distorted trigonal planar AgSe3 and tetrahedral AgSe4 units as well as SbSe3 trigonal ***5SbSe4 crystallizes in the orthorhombic system,nocentrosymmetric space group Cmc21（No.36） with a = 8.1148（6）,b =12.9829（10）,c = 8.7017（7） A,V= 916.76（12） A^3 and Z = *** structure adopts the Ag5SbS4 type and features a 3D framework based on trigonal planar AgSe3 units and SbSe3 trigonal *** results of optical absorption spectra and band structure calculations indicate that the title compounds are narrow band-gap semiconductors.

关键词： selenidoantimonate solvothermal synthesis crystal structure band calculation

Infliximab is superior to other biological agents for treatment of active ulcerative colitis:A meta-analysis

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World Journal of Gastroenterology 2015年第19期21卷 6044-6051页

作者： Wei-qun Mei hui-Zhen Hu Ying Liu Zhi-Chen Li Wei-Guo Wang Department of Gastroenterology No. 117 Hospital of PLA Department of Endocrinology No. 117 Hospital of PLA

AIM: To compare the efficacy and safety of biological agents for the treatment of active ulcerative colitis(UC).METHODS: PubMed, MEDLINE, EMBASE and the Cochrane library were searched to screen relevant articles from January 1996 to August 2014. The mixedtreatment comparison meta-analysis within a Bayesian framework was performed using WinBUGS14 *** proportions of patients reaching clinical response,clinical remission and mucosal healing in induction and maintenance phases were analyzed as efficacy indicators. Serious adverse events in maintenance phase were analyzed as safety ***: The meta-analysis results showed that biological agents achieved better clinical response,clinical remission and mucosal healing than *** comparison indicated that in induction phase,infliximab was more effective than adalimumab in inducing clinical response(OR = 0.41, 95%CI:0.29-0.57), clinical remission(OR = 0.33, 95%CI:0.19-0.56) and mucosal healing(OR = 0.33, 95%CI:0.19-0.56), and golimumab in inducing clinical response(OR = 0.66, 95%CI: 0.39-2.33) and mucosal healing(OR = 2.15, 95%CI: 1.18-4.22). No significant difference was found between placebo and biological agents regarding their ***: All biological agents were superior to placebo for UC treatment in both induction and maintenance phases with a similar safety profile, and infliximab had a better clinical effect than the other biological agents.

关键词： Biological agents Drug safety Efficacy Meta-analysis Ulcerative colitis