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Improved proportional fair dynamic subcarrier allocation with frugality constraint for SC-FDMA system

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The Journal of China Universities of Posts and Telecommunications 2013年第2期20卷 54-59页

作者： LI yi-bing ZHANG Xu YE fang GAO Zhen-guo School of Information and Communication Engineering Harbin Engineering University School of Automation Harbin Engineering University

With the objective of taking full use of channel resource, we proposed two utility based dynamic subcarrier allocation （DSA） algorithms for the single carrier frequency division multiple access （SC-FDMA） system, which are the proportional fair frugality constrained （PF-FC） algorithm and the weighted proportional fair frugality constrained （WPF-FC） algorithm. The two proposed algorithms are designed under the frugality constraint （FC） control consideration so as to avoid service rate waste and improve the spectrum efficiency. Moreover, the queuing buffer model in this paper is established on a finite size structure rather than the traditional infinite queuing manner, which is more consistent with the practical transmission condition. Simulation results indicate that the two proposed algorithms can both achieve significantly better system rate-sum capacity and quality of service （QoS） performance than their primary algorithms, and are more applicable for the heterogeneous traffic.

关键词： SC-FDMA DSA QoS FC proportional fair (PF) algorithm weighted proportional fair (WPF) algorithm

Experimental study on the photodynamic treatment of choroidal neovasculization with nanophthaloc-yanine photosensitizer

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International Journal of Ophthalmology(English edition) 2011年第6期4卷 575-581页

作者： Song-yi Wu guo-Xing Xu yi-Ru Peng Xiao-fang Zhou and Jian guo Fujian Institute of Ophthalmology the First Affiliated Hospital of Fujian Medical University Fuzhou 350005 Fujian Province China

AIM: To investigate the therapeutic effects of nanophthalocyanine photosensitizers on an experimental rat choroidal neovescularization (CNV) model, as well as to evaluate the cytotoxicity of which on human retinal pigment epithelia (HRPE) and human retinal endothelial cells (HRECs). METHODS: Two types of photosensitizers, G(1)-ZnPc(COOH)(8) and G(1)-ZnPc (COOH)(8)/m respectively, were administrated for photodynamic therapy (PDT) after a successful establishment of CNV model on Brown-Norway (BN) rats via fundus photocoagulation. The therapeutic effects of the two drugs were assessed through optical coherence tomography (OCT), fluorescein fundus angiography (FFA) and transmission electron microscopy (TEM). For cytotoxicity tests, cell counting kit-8 (CCK-8) assays and changes of mitochondrial transmembrane potential (Delta psi m) were conducted on HRPE and HRECs after initial uptake of the two drugs. RESULTS: Both photosensitizers demonstrated an improvement of vascular leakage and closure of CNV 1 week after PDT as confirmed by fundus image, OCT, FFA and TEM. Two weeks after PDT, G(1)-ZnPc (COOH)(8)/m showed a better CNV closure effect versus G(1)-ZnPc(COON)(8)(P0.05). Both photosensitizers showed cytotoxicity on HRPE, but G(1)-ZnPc(COOH)(8)/m induced a lower cell viability. CONCLUSION: G(1)-ZnPc (COOH)(8)/m mediated PDT is better than G(1)-ZnPc (COOH)(8) in CNV closure and also have the advantage of fast metabolism leading to less side effect.

关键词： phthalocyanine carrier nanoparticles photodynamic treatment retina pigment epithelial cells choroidal neovascularization

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“共建共治共享”的乡村治理共同体何以建构

河北学刊 2025年第1期45卷 193-201页

作者：王春城郭一文燕山大学公共管理学院河北省高校人文社会科学重点研究基地燕山大学县域振兴发展政策研究中心

以“共建共治共享”为导向建构乡村治理共同体,是回应新时代中国乡村治理诉求的必然要求,而现实图景的生成,需要从学理上探究其系统建构逻辑,明确其价值意蕴、要素体系与行动框架。顺应乡村治理方向的时代变迁,建构乡村治理共同体,要响... 详细信息

以“共建共治共享”为导向建构乡村治理共同体,是回应新时代中国乡村治理诉求的必然要求,而现实图景的生成,需要从学理上探究其系统建构逻辑,明确其价值意蕴、要素体系与行动框架。顺应乡村治理方向的时代变迁,建构乡村治理共同体,要响应政治价值、社会价值和公共价值,这些价值意蕴促使乡村治理共同体成为提升乡村治理效能的重要途径。乡村治理共同体的核心内涵集中体现在组织、价值、行动、利益等要素的关联契合之中,组织架构、价值理念、行动指向、利益成果可作为乡村治理共同体的建构体系。以价值意蕴的指引和要素体系的支撑为基础,乡村治理共同体建构的具体行动可通过以主体互嵌优化乡村治理结构、以价值融通重塑乡村治理理念、以协同共治完善乡村治理方式、以利益聚合共享乡村治理成果四个方面入手,以乡村治理共同体推进乡村治理的网络化、共识化、协同化和共享化,从而以“共建共治共享”的共同体塑造乡村治理新格局。

关键词：乡村治理共同体共建共治共享

Formation Characteristics of Calcium Ferrite in Low Silicon Sinter

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Journal of Iron and Steel Research International 2011年第10期18卷 1-7页

作者： WANG yi-ci ZHANG Jian-liang ZHANG fang LUO guo-ping College of Metallurgical and Ecological Engineering University of Science and Technology Beijing Beijing 100083 China College of Material and Metallurgy University of Science and Technology Inner Mongolia Baotou 014010 Inner Mongolia China

Influence of sintering temperature, basicity and MgO content on the formation characteristics of calcium ferrite in low silicon sinter of Baotou Iron and Steel Company was studied by means of mini-sintering test and mineralographic microscope analysis. In addition, the suitable sintering parameters such as temperature and basicity were explored. The results found that optimum temperature for the formation of calcium ferrite is 1 280℃, the basicity of 2.5-2.8 is helpful to the development of acicular or columnar calcium ferrite, and MgO content in the low silicon sintering raw materials should be lower than 2.8 % because MgO can intensively inhibit the formation of calcium ferrite. And calcium ferrite in the sinter belongs to calcium ferrite with low calcium, which is different from that in ordinary sinter at home and abroad. So, it provided theoretical basis for promoting formation of calcium ferrite in low silicon sinter and improving properties of sinter.

关键词： low silicon sinter formation characteristics calcium ferrite sintering temperature basicity

Effect of Basicity and Alumina-Silica Ratio on Formation of Silico-Ferrite of Calcium and Aluminum

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Journal of Iron and Steel Research International 2012年第4期19卷 1-5页

作者： ZHANG fang AN Sheng-li LUO guo-ping WANG yi-ci School of Materials and Metallurgy Inner Mongolia University of Science and Technology Baotou 014010Inner Mongolia China School of Metallurgical and Ecological Engineering University of Science andTechnology Beijing Beijing 100083 China)

Baivumebo iron ore is special magnetite containing fluorine,kalium and sodium elements,and the main raw material for ironmaking of Baotou Iron and Steel（Group） *** effects of basicity and ratio of Al2O3 to SiO2（A/S） on the formation of silico-ferrite of calcium and aluminium（SFCA） in Baivumebo low silica sinters were studied by means of mini-sintering,XPF-500 optical mineralogical microscope and CSS-88000 electronic universal testing *** results show that it is beneficial to the formation of complex calcium ferrite to enhance the basicity of Baivumebo low silica *** acicular SFCA-I was increased with the enhancing basicity and reached the peak at basicity 2.8,then the columnar or platy SFCA formed and the bonding strength *** is beneficial to the formation of acicular complex calcium ferrite in Baivumebo low silica *** the residual unfused Al2O3 reagent came into being when A/S was 0.35,while complex calcium ferrite still remained to be *** is a common rule about mineralogy components affected by basicity and ratio of A/S,that is,SFCA is increasing accompanied with hematite and porosity reduced,but the content of glass phase is stable

关键词： Baivumebo iron concentrates Baivumebo low silica sinter SFCA basicity alumina-silica ratio

A Projection Approach to Monotonic Regression with Bernstein Polynomials

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Journal of Systems Science & Complexity 2022年第5期35卷 1910-1928页

作者： ZHU guo fang Xiangzhong School of Mathematical Sciences Peking UniversityBeijing 100871China

Monotonic regression problems have been widely seen in many fields like economics and *** the monotonic parameter space is used by the Bayesian methods using Bernstein *** this paper the authors extend the usual parameter space to a larger space in which all the proper parameters making the regression function to be monotonic are *** order to ensure that the problem could be solved in the new parameter space,the authors use a projection posterior method to make *** authors show the proposed method has good approximation properties and performs well compared with other competing methods both in simulations and in practical applications.

关键词： Bayesian nonparametics monotonic regression posterior projection

Soil shear properties as infl uenced by straw content:An evaluation of field-collected and laboratory-remolded soils

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Journal of Integrative Agriculture 2016年第12期15卷 2848-2854页

作者： fang Hui-min ZHANG Qing-yi JI Chang-ying guo Jun College of Engineering Nanjing Agricultural University

Following a rice or wheat harvest, a large amount of crop residue （straw） is retained in fields. The straw is often incorporated into the soil in order to increase the soil organic carbon storage and to reduce soil erosion. However, it has become apparent that the incorporated straw can significantly alter soil shear properties, which can dramatically affect energy inputs for tilling and other soil management practices. In this study, laboratory-remolded wheat straw-soil samples were compared with field-collected straw-soil samples; we found high correlations for the cohesion （R2=0.9084） and internal friction angle （R2=0.9548） properties of the samples. Shear tests on rice and wheat straw with different moisture content levels clearly demonstrated the relatively higher shear strength of wheat straw compared to rice straw. The cohesion of remolded rice and wheat straw-soil samples exhibited an increasing linear trend with an increase in densities, whereas the internal friction angle data for these samples exhibited a quadratic trend. Overlapping the cohesion curves revealed that the wheat straw-soil and rice straw-soil samples had the same cohesion at a straw density of 0.63%. Similar results were obtained when the internal fraction angle curves overlapped; the resultant point of intersection was observed at a straw density of 0.46%. As a whole, the remolded sample methodology was found suitable to simulate the shear properties of soils sampled directly from fields.

关键词： direct shear test wheat straw rice straw cohesion internal friction angle

Non-Darcy flows in layered porous media(LPMs)with contrasting pore space structures

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Petroleum Science 2022年第5期19卷 2004-2013页

作者： Xue-yi Zhang Zhi Dou Jin-guo Wang Zhi-fang Zhou Chao Zhuang School of Earth Sciences and Engineering Hohai UniversityNanjing 210098JiangsuChina

Compared to single layer porous media,fluid flow through layered porous media(LPMs)with contrasting pore space structures is more *** study constructed three-dimensional(3-D)pore-scale LPMs with different grain size ratios of 1.20,1.47,and *** flow behavior in the constructed LPMs and single layer porous media was numerically investigated.A total of 178 numerical experimental data were collected in LPMs and single layer porous *** all cases,two different flow regimes(i.e.,Darcy and Non-Darcy)were *** influence of the interface of layers on Non-Darcy flow behavior in LPMs was analyzed based pore-scale flow *** was found that the available correlations based on single layer porous media fail to predict the flow behavior in LPMs,especially for LPM with large grain size *** effective permeability,which incorporated the influence of the interface is more accurate than the Kozeny-Carman equation for estimating the Darcy permeability of *** inertial pressure loss in LPMs,which determines the onset of the Non-Darcy flow,was underestimated when using a power law expression of mean grain *** constant B,an empirical value in the classical Ergun equation,typically equals *** inertial pressure loss in LPMs can be significantly different from it in single lager porous *** Non-Darcy flow in LPMs,it is necessary to consider a modified larger constant B to improve the accuracy of the Ergun empirical equation.

关键词： Non-Darcy flow Layered porous media Heterogeneity Forchheimer equation Simulations

Initiation of Acupoint Molecular Mechanisms for Manual Acupuncture Analgesia—Nuclear FactorκB Signaling Pathway

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Chinese Journal of Integrative Medicine 2021年第12期27卷 933-939页

作者： ZHANG Kuo ZHAO Xue YANG Tao ZHANG Yan-fang YAN Ya-wen XU Zhi-fang GONG yi-nan LIU Yang-yang guo Yong-ming guo yi Academy of Medical Engineering and Translational Medicine Tianjin UniversityTianjin(300072)China Research Center of Experimental Acupuncture Science Tianjin University of Traditional Chinese MedicineTianjin(301617)China Affiliated Hospital of Municipal Institute of Traditional Chinese Medicine of Changzhi City Shanxi Province(046000)China Sanhuai Road Community Health Service Center Tanggu StreetBinhai New AreaTianjin(300451)China School of Traditional Chinese Medicine Tianjin University of Traditional Chinese MedicineTianjin(301617)China

Objective To identify the prominent molecular signaling in acupoints and explore their roles in initiating the analgesia effect of manual acupuncture(MA).Method A three-step study was conducted,the experiment 1 was a genome-wide analysis of the tissue at acupoint Zusanli(ST 36),including 12 Wistar rats which were divided into control,control+MA1,and control+MA7 *** the experiment 2,the paw withdrawal latency(PWL),immunohistochemistry and Western blot analysis of phospho-nuclear factor kappa B(NFκB)p65(p-p65),phospho-NFκB p50(p-p50)at ST 36 were performed on rats of saline,saline+MA,and complete Freund’s adjuvant(CFA)+MA groups(n=6).In experiment 3,24 rats were divided into saline+DMSO,CFA+DMSO,CFA+DMSO+MA,and CFA+BAY 11–7082+MA groups,the PWL and immunofluorescence assay of NFκB p65 at ST 36 was ***(1)The gene:inhibitor of NFκB(Nfkbia),interleukin-1β(Il1b),interleukin-6(Il6),chemokine c-x-c motif ligand 1(Cxcl1),monocyte chemoattractant protein-1(MCP-1/Ccl2)expressions in the control+MA7 group were significantly increased(P<0.05 or P<0.01),and the expression of NFκB p65(Rela),NFκB p50(Nfkb1)were increased in the control+MA7 group(P<0.05).(2)CFA+MA groups showed increased PWL from day 1 to 7(P<0.01 ***),and the Western blot results were consistent with immunohistochemistry,the expression of NFκB p-p65 and NFκB p-p50 were significantly increased in the MA-related groups compared with control and CFA groups(P<0.05).(3)Compared with the CFA+DMSO+MA group,the PWL of the CFA+BAY 11–7082+MA group decreased significantly and continued until day 5 and 7(P<0.05 and P<0.01,respectively),and the NFκB p65 expression of CFA+BAY 11–7082+MA was significantly reduced compared with CFA+DMSO+MA(P<0.01).Conclusion Local NFκB signaling cascade in acupoint caused by MA is an important step in initiating the analgesic effect,which would provide new evidence for the initiation of MA-effect and improve the understanding of the scientific basis of acupuncture analgesia.

关键词： manual acupuncture acupoint analgesia nuclear factor kappa B