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Deployment of Sensors in WSN: An Efficient Approach Based on Dynamic Programming

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Chinese Journal of Electronics 2015年第1期24卷 33-37页

作者： li yongyan GAO Wen WU Chunming WANG Yansong University of Shaoxing at Shang Yu Institute of Computer System Architecture Zhejiang University ZTE Corporation

Efficient sensor node deployment is extremely important in wireless sensor networks. It earns great practical meanings through using fewer sensor nodes as far as possible to satisfy different requirements such as the requirement on coverage and overcoming the potential sensor node failures and the adverse influence from the environment. We propose an efficient approach for the deployment of sensor nodes in wireless networks, termed as EDSNDA, which is excellent in taking both the requirements of sensor coverage and network connectivity into consideration when minimizing the number of necessary sensor nodes to the best of its ability. We proposed a new coverage model of sensor node. Based on the sensor coverage model, we establish four dynamic programming models in four different practical situations, respectively. The algorithms are then proposed which are used for solving the corresponding dynamic programming models. The validity of the method is justified by simulation studies in which the method is compared with the current representative methods. The simulation results show that our method performs better than the other ones with fewer sensor nodes, better coverage and network connectivity result in the same circumstance.

关键词： Wireless sensor network Sensor node deployment Dynamic programming Sensor coverage model

口炎清颗粒联合抗病毒口服液治疗儿童疱疹性口腔炎临床研究

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新中医 2024年第2期56卷 105-108页

作者：张楠李永彦史东梅濮阳市第三人民医院儿童口腔科河南濮阳457000 濮阳市第三人民医院牙周黏膜科河南濮阳457000

目的:观察口炎清颗粒联合抗病毒口服液治疗儿童疱疹性口腔炎的临床效果。方法:将80例疱疹性口腔炎患儿随机分成对照组和研究组各40例。对照组在西药对症治疗的基础上加用抗病毒口服液治疗,研究组在对照组基础上加用口炎清颗粒治疗。治疗... 详细信息

目的:观察口炎清颗粒联合抗病毒口服液治疗儿童疱疹性口腔炎的临床效果。方法:将80例疱疹性口腔炎患儿随机分成对照组和研究组各40例。对照组在西药对症治疗的基础上加用抗病毒口服液治疗,研究组在对照组基础上加用口炎清颗粒治疗。治疗1周后,评估2组临床疗效和药物不良反应(ADR)发生率,并比较治疗前后中医证候评分,血清炎症因子[肿瘤坏死因子-α (TNF-α)、白细胞介素-2 (IL-2)、白细胞介素-6 (IL-6)]及免疫指标[CD4^(+)/CD8^(+)、血清免疫球蛋白A (IgA)]水平。结果:治疗后,研究组总有效率为95.00%,对照组为80.00%,2组比较,差异有统计学意义(P0.05)。结论:口炎清颗粒联合抗病毒口服液治疗小儿疱疹性口腔炎效果确切,可明显改善中医证候,有效抑制机体炎症反应,改善患者免疫功能。

关键词：疱疹性口腔炎口炎清颗粒抗病毒口服液炎症因子免疫功能

电压依赖性阴离子通道与糖尿病肾脏疾病研究进展

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包头医学院学报 2024年第8期40卷 91-96页

作者：赖连英李永妍杨时旭王颖海南医学院第一附属医院海南海口570102

电压依赖性阴离子通道(voltage dependent-anion channel,VDAC)位于线粒体外膜,是一种转运三磷酸腺苷(adenosine triphosphate,ATP)和细胞间代谢产物的通道蛋白,对线粒体代谢及细胞生长起着重要的调节作用。最近的研究表明,VDAC在心肌... 详细信息

电压依赖性阴离子通道(voltage dependent-anion channel,VDAC)位于线粒体外膜,是一种转运三磷酸腺苷(adenosine triphosphate,ATP)和细胞间代谢产物的通道蛋白,对线粒体代谢及细胞生长起着重要的调节作用。最近的研究表明,VDAC在心肌病、动脉粥样硬化、高血压和糖尿病(diabetes mellitus,DM)中均有显著升高。糖尿病肾脏疾病(diabetes kidney disease,DKD)是糖尿病的主要微血管并发症,是导致终末期肾病的最常见原因,其发病机制复杂,VDAC参与其中。本文对VDAC蛋白的结构、特性、作用机制以及与DKD关系的研究进展进行综述。

关键词：电压依赖性阴离子通道糖尿病肾脏疾病氧化应激细胞凋亡

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铝工业赤泥用于脱硫技术现状及展望

中国有色冶金 2024年第2期53卷 34-41页

作者：闫飞飞刘万超练以诚李永艳张立志中铝环保节能集团有限公司北京101300 中铝环保节能集团有限公司北京技术中心北京101300 北京铝能清新环境技术有限公司北京101300

以铝工业赤泥作为原料制备工业脱硫剂,具有来源丰富、价格低廉、理论硫容高等优点,在低成本脱硫的同时,达到了“以废制废”的目的。本文总结了铝工业赤泥在脱硫方面的应用,全面综述了赤泥干法、湿法脱除SO_(2)和H_(2)S的技术现状,从活... 详细信息

以铝工业赤泥作为原料制备工业脱硫剂,具有来源丰富、价格低廉、理论硫容高等优点,在低成本脱硫的同时,达到了“以废制废”的目的。本文总结了铝工业赤泥在脱硫方面的应用,全面综述了赤泥干法、湿法脱除SO_(2)和H_(2)S的技术现状,从活性组分利用效率、能量消耗、工艺复杂程度、后续环境问题等几个维度分析对比了几种研究方向各自的优劣,并展望了未来工业化应用可能遇到的问题和进一步研究方向。指出在湿法浆液脱除烟气中SO_(2)方面,仍需克服管道堵塞、低效率、高能耗、以及由此产生的大量稀盐处理等技术性难题,同时应对其含有的过渡金属的反应机理和活化手段进行研究;在干法脱除H_(2)S方面,需进一步从低成本活化氧化铁的途径、极端工况环境下的适用性、废脱硫剂的资源化、以及与其他工业固废的协同处理等方面展开研究。

关键词：铝工业赤泥消纳赤泥脱硫干法脱硫湿法脱硫 SO_(2) H_(2)S 赤泥综合利用

Nd:YAG激光联合牙周基础治疗在老年慢性牙周炎患者中的应用效果

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中国民康医学 2024年第19期36卷 41-43,47页

作者：连会娜谢佳典李永彦濮阳市第三人民医院濮阳市口腔激光医学重点实验室牙周粘膜病科河南濮阳457000 濮阳市第三人民医院濮阳市口腔激光医学重点实验室口腔颌面外科河南濮阳457000

目的:观察Nd:YAG激光联合牙周基础治疗在老年慢性牙周炎(CP)患者中的应用效果。方法:回顾性分析2022年1—12月该院收治的100例老年CP患者的临床资料,按照治疗方法不同将其分成研究组与对照组各50例。对照组给予牙周基础治疗,研究组在对... 详细信息

目的:观察Nd:YAG激光联合牙周基础治疗在老年慢性牙周炎(CP)患者中的应用效果。方法:回顾性分析2022年1—12月该院收治的100例老年CP患者的临床资料,按照治疗方法不同将其分成研究组与对照组各50例。对照组给予牙周基础治疗,研究组在对照组基础上联合Nd:YAG激光治疗,两组均治疗3个月。比较两组治疗前后牙周指标[探诊深度(PD)、牙周附着水平(CAL)、菌斑指数(Pli)、龈沟出血指数(SBI)]、龈沟液炎性因子[白细胞介素(IL)-1β、IL-6、IL-8、超敏C反应蛋白(hs-CRP)]、牙周微循环指标[牙龈血流速度(BCV)、血流量(GBF)]水平和咀嚼效率。结果:治疗后,研究组Pli、SBI评分和PD、CAL水平均低于对照组,差异有统计学意义(P<0.05);治疗后,研究组IL-1β、IL-6、IL-8、hs-CRP水平均低于对照组,差异有统计学意义(P<0.05);治疗后,研究组BCV、GBF水平和咀嚼效率均高于对照组,差异有统计学意义(P<0.05)。结论:Nd:YAG激光联合牙周基础治疗应用于老年CP患者可降低牙周指标、龈沟液炎性因子水平,提高牙周微循环指标水平和咀嚼效率,效果优于单纯牙周基础治疗。

关键词： Nd:YAG激光牙周基础治疗老年慢性牙周炎牙龈微循环咀嚼效率

Mitochondrial tRNA^(Glu) A14693G variant may modulate the phenotypic manifestation of deafness-associated 12S rRNA A1555G mutation in a Han Chinese family

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Journal of Genetics and Genomics 2009年第4期36卷 241-250页

作者： Yu Ding yongyan li Junyan You li Yang Bobei Chen Jianxin Lu Min-Xin Guan Zhejiang Provincial Key Laboratory of Medical Genetics School of Life Sciences Wenzhou Medical College Wenzhou 325025 China Division of Human Genetics and Center for Hearing and Deafness Research Cincinnati Children's Hospital Medical Center Cincinnati Ohio 45229 USA Department of Otolaryngology the SecondAffiliated Hospital Wenzhou Medical College Wenzhou 325000 China Deparment of Pediatrics University of Cincinnati College of Medicine Cincinnati Ohio 45229 USA

Mutations in mitochondrial 12S rRNA gene are one of the most important causes of aminoglycoside-induced and nonsyndromic hearing loss. Here we report the characterization of one Han Chinese pedigree with aminoglycoside-induced and nonsyndromic hearing loss. This Chinese family carrying the 12S rRNA A1555G mutation exhibited high penetrance and expressivity of heating impairment. In particular, penetrances of hearing loss in this family pedigree were 43.8% and 25%, respectively, when aminoglycoside-induced heating loss was included or excluded. Mutational analysis of entire mitochondrial genomes in this family showed the homoplasmic A1555G mutation and a set of variants belonging to haplogroup Y2. Of these, the A14693G variant occurred at the extremely conserved nucleotide （conventional position 54） of the TψC-loop of tRNA^Clu and was absent in 156 Chinese controls. Nucleotides at position 54 of tRNAs are often modified, thereby contributing to the structural formation and stabilization of functional tRNAs. Thus, the structural alteration of tRNA by the A14693G variant may lead to a failure in tRNA metabolism and impair mitochondrial protein synthesis, thereby worsening mitochondrial dysfunctions altered by the A1555G mutation. Therefore, the tRNA^Glu A14693G variant may have a potential modifier role in increasing the penetrance and expressivity of the deafness-associated A1555G mutation in this Chinese pedigree.

关键词： hearing loss mitochondrial DNA mutation modifier 12S rRNA tRNA Chinese family

Learning to Design Research: Students’ Agency and Experiences in a Master of Education Program in Hong Kong

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ECNU Review of Education 2020年第2期3卷 291-309页

作者： Weipeng Yang yongyan li Wumei Zhou Hui li S R Nathan School of Human Development Singapore University of Social Sciences University of Hong Kong Macquarie University

Purpose:Learning to do research has been understudied in the context of professional development in postgraduate *** exploratory study investigated the agency and experiences of five Chinese students who learned to design their research project in a Master of Education program at an English-medium university in Hong Kong ***/Approach/Methods:We obtained the data from semi-structured interviews and documents to establish data ***:The findings revealed that(1)the students’agency in research design and proposal writing was associated with their personal/professional backgrounds,(2)their English proficiency affected their agency in the proposal writing,(3)the supervisors’feedback would stimulate students’agency in changing/refining their research design,and(4)ineffective supervision and learning resources would impede students’achievement of agency on their way to creating a robust research ***/Value:This study adds empirical evidence to the field of research training through the lens of learner *** demonstrates the applicability of using the ecological framework of agency in theoretically interpreting the contextual facilitators and constraints in making postgraduate students active agents.

关键词： Educational research English as a foreign language Master of Education research design student agency

Corrosion behavior of Mg-Zn-Ca amorphous alloys with Nd addition in simulated body fluids

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China Foundry 2014年第6期11卷 503-509页

作者： Qin Chunling Xiao Tongna li yongyan Wang Zhifeng liu li Xiong Hanqing Zhao Weimin School of Materials Science and Engineering Hebei University of Technology School of Materials Science and Engineering Central South University

The effects of Nd addition on corrosion behavior of Mg66Zn30Ca4 amorphous alloys in simulated body fluids （SBF） were studied in this paper. Electrochemical properties of the samples before and after corrosion were determined. Surface morphologies of samples after immersion in SBF at 37 ℃ for different times were observed under scanning electron microscope （SEM）. Results show that the corrosion resistance of Mg-based alloys in SBF is improved with the addition of Nd element. The electrochemical properties indicate that microalloying Nd element to the alloys leads to an ennoblement in the open circuit potentials of the alloys and a decrease in the anodic current density in SBF, especially for the Mgee66-xZn30Ca4Ndx alloys with Nd content of 1.0at.%-1.5at.%. It was observed that the surface morphologies of the alloys immersed in SBF change with the Nd addition. A flake- like structure parallel to the alloy substrate formed on the surface of 1.0at.% Nd-containing alloy immersed in SBF for 7 days improves the corrosion resistance of the amorphous alloys by blocking the corrosion liquid from attacking the alloys.

关键词： Mg alloy amorphous alloy corrosion behavior SBF electrochemical measurements

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纳米颗粒在肾脏疾病中的应用及研究进展

实用药物与临床 2024年第9期27卷 695-700页

作者：赖连英王颖李莉杨时旭李永妍符月英马星天海南医科大学第一附属医院海南海口570102 海南医科大学第一临床医学院海南海口571199 海南省老年病医院海南海口571100

纳米颗粒(Nanoparticles,NP)作为一种新兴材料,已广泛应用于工业、医疗和生物学等领域。近年来,NP在肾脏疾病中的作用受到广泛关注,由于NP具有穿透细胞、穿越生物屏障的特性,因而在肾脏疾病的诊疗中有广阔的应用前景。本文从NP的结构和... 详细信息

纳米颗粒(Nanoparticles,NP)作为一种新兴材料,已广泛应用于工业、医疗和生物学等领域。近年来,NP在肾脏疾病中的作用受到广泛关注,由于NP具有穿透细胞、穿越生物屏障的特性,因而在肾脏疾病的诊疗中有广阔的应用前景。本文从NP的结构和功能入手,重点阐述NP的理化特性对肾功能的影响,并探讨NP在肾脏疾病的诊断及治疗中的应用。

关键词：纳米颗粒肾脏糖尿病肾病诊断治疗