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Environmental stress and eutrophication in freshwater wetlands: evidence from carbon and nitrogen stable isotopes in cattail (Typha domingensis Pers.)

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Ecological Processes 2019年第1期8卷 383-390页

作者： Ziye Zheng Yahong Xu Jianzhu Wang yuncong Li Binhe Gu Engineering Research Center of Eco-environment in Three Gorges Reservoir Region Ministry of EducationChina Three Gorges UniversityYichang 443002China Tropical Research and Education Center University of Florida18905 SW 280th St.HomesteadGainesvilleFL 33031USA Soil and Water Science Department University of Florida106 Newell HallGainesvilleFL 32611USA

Background:Florida’s Everglades is a vast freshwater peatland that has been impacted by the alterations of hydrological pattern and water quality which led to changes in plant species composition and *** this study,carbon and nitrogen stable isotopes(δ13C andδ15N)in cattail(Typha domingensis)are evaluated as indicators of environmental changes in the Everglades wetlands along nutrient and hydrological gradients represented by reference sites with total phosphorus(TP)<10μg L−1,transition sites with TP≥10μg L−1<20μg L−1 and impacted sites with TP≥20μg L−1 which differed in hydrology or habitats(marsh and canal).Results:Cattailδ13C values decreased significantly from reference(–24.1‰),transition(–26.8‰)to the impacted sites(–28.2‰).In contrast,δ15N values increased significantly from reference(–5.2‰),transition(2.4‰)to the impacted site(5.9‰).In response to a poor hydrological condition,cattail in marsh area displayed 13C enrichment(–26.0‰)and 15N depletion(0.2‰).By contrast,cattail grown in the canal sites with favorable hydropattern displayed 13C depletion(–27.6‰)and 15N enrichment(5.9‰)from the canal sites with more favorable hydrological ***:The different patterns for the changes inδ13C andδ15N in cattail suggested that increased nutrients led to increased stomatal conductance and 13C fractionation during carbon uptake and decreased 15N fractionation with increasing nitrogen demand while poor hydrological condition coupled with low nutrients led to reduced plant growth indicated by higherδ13C and lowerδ15N *** from this study suggested thatδ13C in emerged macrophytes such as cattail can be used as an indicator for environmental stress whileδ15N is a robust indicator for wetland eutrophication.

关键词： Cattail Eutrophication Everglades Nutrient gradient Phosphorus enrichment Stable isotopes Wetlands

Cooperative Jobs Dispatching in Edge Computing Network with Unpredictable Uploading Delay

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Journal of Communications and Information Networks 2020年第1期5卷 75-85页

作者： Bojie Lyu yuncong Hong Haisheng Tan Zhenhua Han Rui Wang Department of Electrical and Electronic Engineering Southern University of Science and Technology(SUSTech)Shenzhen 518055China Department of Electrical and Electronic Engineering Southern University of Science and Technology(SUSTech)Shenzhen 518055China Department of Computer Sciencethe University of Hong Kong(HKU)Hong Kong 999077China LINKE Lab University of Science and Technology of China(USTC)Hefei 230026China

In this paper,the cooperative jobs dispatching problem in an edge computing network with multiple access points(APs)and edge servers is *** to the uncertain traffic in the network between APs and edge servers,the job uploading delay can not be predicted ***,the job arrivals at the APs,the job uploading delay from APs to edge servers and the job computation time at the edge servers are all modeled as random *** each job dispatching decision will affect the system state in the future,we formulate the joint optimization of jobs dispatching at all the APs and all the scheduling time slots as an infinite-horizon Markov decision process(MDP).The minimization objective is a discounted measurement of the average processing time per job,including the uploading delay,the waiting time and the computation time at the edge *** this problem,the approximate MDP should be adopted to address the curse of *** low-complexity approximate solution of MDP is usually hard to predict the performance *** this paper,a novel approximate MDP solution framework is proposed via one-step policy iteration over a baseline policy,where the analytical performance bound can be ***,since the expression of the approximate value function is derived,the value iteration in conventional methods can be eliminated,which can essentially reduce the computation *** is shown by simulations that the proposed low-complexity algorithm has significantly better performance than various benchmark schemes.

关键词： edgecomputing Markovdecisionprocess(MDP) approximateMDP jobsdispatching

替米沙坦辅助治疗轻中度高血压合并2型糖尿病的效果研究

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中国药物滥用防治杂志 2024年第2期30卷 315-318,324页

作者：肖火金郭云聪伍礼荣福建省三明市将乐县高唐镇中心卫生院福建三明353301 福建省三明市将乐县总医院福建三明353300

目的:探讨轻中度高血压(HP)合并2型糖尿病(T2DM)患者给予替米沙坦联合硝苯地平控释片、二甲双胍治疗的临床效果。方法:选取2021年8月—2022年7月福建省三明市将乐县高唐镇中心卫生院收治的轻中度HP合并T2DM患者共计92例,以随机数字表法... 详细信息

目的:探讨轻中度高血压(HP)合并2型糖尿病(T2DM)患者给予替米沙坦联合硝苯地平控释片、二甲双胍治疗的临床效果。方法:选取2021年8月—2022年7月福建省三明市将乐县高唐镇中心卫生院收治的轻中度HP合并T2DM患者共计92例,以随机数字表法分成研究组(46例)与对照组(46例)。对照组给予硝苯地平控释片、二甲双胍治疗,研究组给予替米沙坦联合硝苯地平控释片、二甲双胍治疗,比较两组临床疗效、血压水平[收缩压(SBP)、舒张压(DBP)]、血糖水平[空腹血糖(FPG)、糖化血红蛋白(HbA1c)、餐后2h血糖(2hPG)]、血脂水平[高密度脂蛋白(HDL)、低密度脂蛋白(LDL)、甘油三酯(TG)]及不良反应。结果:研究组治疗总有效率为91.30%,高于对照组的76.09%(P0.05)。结论:轻中度HP合并T2DM患者给予替米沙坦联合硝苯地平控释片、二甲双胍治疗能够提高临床疗效,调节患者血压、血糖及血脂水平,具有较高的安全性。

关键词：轻中度高血压 2型糖尿病替米沙坦硝苯地平控释片二甲双胍

Rational Design of Ratiometric Fe^(3+) Fluorescent Probes Based on FRET Mechanism

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Chemical Research in Chinese Universities 2022年第1期38卷 67-74页

作者： LI Mingfeng FANG Hongbao JI Yifan CHEN yuncong HE Weijiang GUO Zijian State Key Laboratory of Coordination Chemistry Chemistry and Biomedicine Innovation Center(ChemBIC)School of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023P.R.China

As the most abundant transition metal element in mammals, iron(Fe) plays a vital role in life activities. It is of great significance to study the variation of Fe3+ level in living organisms. In virtue of the advantages of high sensitivity, good selectivity and low damage to living systems, the fluorescence detection of Fe3+ has attracted much attention. Compared with the intensity-based fluorescent probe, the ratiometric fluorescent probe has less interference of environmental and can realize quantitative detection. In this study, four ratiometric Fe3+ fluorescent probes, R1, R2, R3 and R4, were designed and synthesized using fluorescence resonance energy transfer(FRET) mechanism to achieve quantitative detection of Fe3+. In the FRET systems, 1,8-naphthalimide fluorophore derivatives were adopted as donors while rhodamine B derivatives were selected as receptors. The connection sites of the donor and acceptor in R3 and R4 are different from those in R1 and R2. All the four probes showed good response and selectivity to Fe3+. The energy transfer efficiencies of R3 and R4 were obviously higher than those of R1 and R2. This work provided a promising strategy for the development of fluorescent ratiometic Fe3+sensors.

关键词： Fluorescent probe Fluorescence resonance energy transfer(FRET) Fe^(3+) Ratiomertic detection

基于仿真的构架车间瓶颈识别与人工资源配置优化

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组合机床与自动化加工技术 2024年第6期 1-5,11页

作者：舒云聪朱海平沈继统閤泰梓吴向阳刘念祖华中科技大学机械科学与工程学院武汉430074 中车青岛四方机车车辆股份有限公司青岛266111

需要生产多种类型构架的复杂车间,在瓶颈工序快速准确识别、人工资源精确配置上存在不合理的问题,提出了一种基于仿真的构架车间瓶颈工序识别与人工资源配置优化的方法。首先,对车间进行细致调研,基于Factory Simulation软件建立仿真模... 详细信息

需要生产多种类型构架的复杂车间,在瓶颈工序快速准确识别、人工资源精确配置上存在不合理的问题,提出了一种基于仿真的构架车间瓶颈工序识别与人工资源配置优化的方法。首先,对车间进行细致调研,基于Factory Simulation软件建立仿真模型,实现准确模拟现实车间的生产;其次,对仿真模型输出结果中的设备利用率、在制品数量等关键参数进行特征分析,系统地识别瓶颈工序,根据工序特性做出瓶颈优化方案;然后,基于Java语言构建模拟退火算法,设置目标为最小化人工资源配置总数和最小化计划完成总时间,对人工资源配置方案进行优化;最后,验证并确定最终的优化方案。

关键词：车间仿真 Factory Simulation 瓶颈识别人工资源配置模拟退火

关节镜下自体复合补片移植联合肱二头肌长头腱重建上关节囊治疗巨大不可修复肩袖撕裂的疗效

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中华创伤杂志 2024年第3期40卷 236-242页

作者：冀云聪许健康运康毕文智马炜杨东强崔红林付鹏飞刘一军田进翔郭标蚌埠医科大学附属阜阳医院(阜阳市人民医院)骨科运动医学与关节镜病区阜阳236000

目的探讨关节镜下自体复合补片移植联合肱二头肌长头腱重建上关节囊治疗巨大不可修复肩袖撕裂(IMRCT)的疗效。方法采用回顾性病例系列研究分析2020年5月至2022年6月蚌埠医科大学附属阜阳医院(阜阳市人民医院)收治的11例IMRCT患者的临床... 详细信息

目的探讨关节镜下自体复合补片移植联合肱二头肌长头腱重建上关节囊治疗巨大不可修复肩袖撕裂(IMRCT)的疗效。方法采用回顾性病例系列研究分析2020年5月至2022年6月蚌埠医科大学附属阜阳医院(阜阳市人民医院)收治的11例IMRCT患者的临床资料,其中男7例,女4例;年龄54~74岁[(62.6±7.3)岁]。患者均采用关节镜下自体复合补片移植联合肱二头肌长头腱重建上关节囊治疗。比较术前、术后6个月及末次随访时视觉模拟评分(VAS)、肩肱距离(AHD)、Constant⁃Murley评分、美国加州大学洛杉矶分校(UCLA)功能评分和肩关节主动活动度。末次随访时行肩关节MRI评估重建上肩关节囊和肱二头肌长头腱的完整性。观察术后并发症发生情况。结果患者均获随访13~39个月[16(13,36)个月]。术后6个月,肩关节VAS、AHD、Constant⁃Murley评分和UCLA功能评分分别为2(2,3)分、(9.1±1.1)mm、(56.1±5.4)分、(19.7±2.8)分,均较术前改善[6(5,7)分、(5.1±1.2)mm、(37.9±2.2)分、(11.8±1.2)分](P0.05);Constant⁃Murley评分、UCLA功能评分均较术后6个月进一步改善(P0.05)。末次随访时,MRI显示10例患者重建上关节囊和肱二头肌长头腱完整。术后1年1例出现大结节吸收,1例冈上肌肌腱部分撕裂。结论采用关节镜下自体复合补片移植联合肱二头肌长头腱重建上关节囊治疗IMRCT,可缓解肩关节疼痛、减少肱骨头上移、改善肩关节功能及活动度、减少并发症。

关键词：肩损伤关节镜检查腱固定术关节囊阔筋膜

企业潜在合作关系预测方法研究——以钙钛矿太阳能电池为例

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竞争情报 2024年第2期20卷 12-23页

作者：窦路遥周志刚申婧黄运聪山西财经大学信息学院太原030006 中国农业银行安徽省分行合肥230000

运用融合资源传导、协同过滤以及链路预测理论对“企业-专利”关系进行系统而新颖的逻辑表达,继而精准有效地识别企业潜在的合作关系,有助于企业丰富技术维度并推动产业创新化进程。基于竞争情报思想,以钙钛矿太阳能电池领域7415个技术... 详细信息

运用融合资源传导、协同过滤以及链路预测理论对“企业-专利”关系进行系统而新颖的逻辑表达,继而精准有效地识别企业潜在的合作关系,有助于企业丰富技术维度并推动产业创新化进程。基于竞争情报思想,以钙钛矿太阳能电池领域7415个技术专利为数据基础,构建以专利资源传导为基础的动态转移推荐,以链路预测方法为基础的异质网络推荐,以专利文本为基础的协同过滤推荐。通过引入可调参数,将三者融合成推荐系统,使得企业能够结合现实场景选择需要关注的专利资源和合作伙伴。研究表明,混合推荐系统的融合视角为颠覆性技术企业潜在关系预测提供了崭新的研究方法,所构建的推荐系统实现了推荐结果“准确化+新颖化+全面化”的多方位表达,为企业未来合作提供了决策和参考。

关键词：混合推荐关系预测专利文本钙钛矿太阳能电池新颖化

Recent advances in chiral aggregation-induced emission fluorogens

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Engineered Regeneration 2022年第3期3卷 323-338页

作者： Rui Hu yuncong Yuan Meijia Gu You-Quan Zou Key Laboratory of Combinatorial Biosynthesis and Drug Discovery Ministry of EducationSchool of Pharmaceutical SciencesWuhan UniversityWuhanChina College of Life Sciences Wuhan UniversityWuhanChina TaiKang Center for Life and Medical Sciences Wuhan UniversityWuhanChina

Over the past decade,aggregation-induced emission(AIE)molecules have played a pivotal role in bioimaging,anti-microbial,and photodynamic therapy,and have been at the forefront of several disciplines *** combined with chiral moieties,they can easily collide with dazzling sparks and exhibit exceptional and unique *** the application of chiral recognition and measurement of enantiomeric excess,it can identify chi-ral molecules visually based on color change and precipitation reaction,quantitatively analyze chiral molecules while determining the enantiomeric composition based on the fluorescence intensity change at different wave-lengths,and obtain two parameters about chiral molecules from one measurement,thereby demonstrating its high selectivity,sensitivity and accuracy in chiral *** the field of organic circularly polarized lu-minescent(CPL)materials,the asymmetry(g lum)of common organic light emitting elements is usually between 10−5 and 10−2,whereas the CPL asymmetry factor(g lum)of chiral AIE fluorogens(AIEgens)can reach 1.42,which is very close to the theoretical value of ***,the combination of chiral elements and luminescent groups promotes their adoption in the field of organic CPL *** we have summarized the recent applications of chiral AIEgens in both chiral molecule recognition and circularly polarized organic light-emitting diode(CP-OLED)in order to provide future researchers with a more comprehensive and detailed understanding of chiral AIEgens and to encourage more scientists to contribute to the development of AIEgens.

关键词： Aggregation-induced emission Chiral AIE fluorogens Recognition Circularly polarized luminescent

Effects of Plant Growth-Promoting Rhizobacteria and N Source on Plant Growth and N and P Uptake by Tomato Grown on Calcareous Soils

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Pedosphere 2017年第6期27卷 1027-1036页

作者： Xiaohui FAN Shouan ZHANG Xiaodan MO yuncong LI Yuqing FU Zhiguang LIU Tropical Research and Education Center Institute of Food and Agricultural Sciences(IFAS)University of FloridaHomestead FL 33031(USA)

Introducing specific microorganisms into the soil ecological system is an important strategy for improving nutrient use *** pot experiments were conducted in the greenhouse from December 3, 2012 to January 25, 2013(Experiment 1) and March 11 to April 23, 2013(Experiment 2) to evaluate the effect of nitrogen(N) source and inoculation with plant growth-promoting rhizobacteria(PGPR) on plant growth and N and phosphorus(P) uptake in tomato(Lycopersicon esculentum Mill.) grown on calcareous soils from South Florida, *** included urea, controlled release urea(a controlled release fertilizer, CRF) each at low and high N rates and with or without inoculation of PGPR.A mixture of PGPR strains Bacillus amyloliquefaciens IN937 a and Bacillus pumilus T4 was applied to the soil during growing periods of *** with PGPR inoculation increased plant height compared to treatments without PGPR in both *** with PGPR increased shoot dry weight and shoot N uptake for the same N rate and N *** both experiments, only at high N rate, CRF and urea treatments with PGPR had significantly(P < 0.05)greater shoot biomass than those without *** at high N rate, CRF treatment with PGPR significantly increased shoot N uptake by 39.0% and 10.3% compared to that without PGPR in Experiments 1 and 2, ***, presence of PGPR in the soil increased shoot P uptake for all treatments in Experiment 1 and for most treatments in Experiment *** Experiment 1, only at low N rate, CRF treatment with PGPR significantly increased shoot P uptake compared with that without *** Experiment2, a significant increase in shoot P uptake by inoculation of PGPR was only observed in CRF treatment at high N *** from this study indicate that inoculation with PGPR may increase plant growth and N and P uptake by tomato grown on calcareous ***, the effect of PGPR varied and was influenced by many factors such as N source, N rate

关键词： controlled release fertilizer plant biomass nitrogen phosphorus nutrient uptake