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Sub-Lethal Effects of Fenvalerate on the Development, Fecundity, and Juvenile Hormone Esterase Activity of Diamondback Moth, Plutella xylostella (L.)

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Agricultural Sciences in China 2010年第11期9卷 1612-1622页

作者： WEI Hui WANG Juan LI Hong-shan dai hua-guo GU Xiao-jun institute of Plant Protection Fujian Academy of Agricultural Sciences Fuzhou 350013 P.R.China College of Plant Protection Nanjing Agricultural University Nanjing 210095 P.R. China Yancheng Institute of Technology Yancheng 224003 P.R.China Institute of Applied Ecology Fujian Agriculture and Forestry University Fuzhou 350002 P.R.China

The toxicities of fenvalerate （20% EC） to the 3rd instar larvae of diamondback moth （DBM）, Plutella xylostella （L.）, reared on three host plants viz., radish, oilseed rape, and cabbage were tested. The LC50 values of fenvalerate to the 3rd instar larvae of DBM varied with host plants, however, there wasn＇t any significant difference among them （P〉 0.05）. Similarly, DBM fed on three host plants had same pupal weight, pupal period, pupation rate, adult emergence rate, female ratio, and fecundity. The activity of juvenile hormone esterase （JHE, EC 3.***.1.1） in the 3rd instar larvae of DMB did not significantly vary with host plants, either. These suggested that DBM had similar fitness on the three host plant species. When fed on the host plants pretreated with fenvalerate at the concentrations equivalent to LC20, LC50 and LC50, the pupation rate, pupal weight, adult emergence rate, female ratio, fecundity, and JHE activity of the tested insects were declined as compared with insects in control treatments fed on the same host plant species. Furthermore, the pupal period of the tested insects was extended after fenvalerate treatment. The decrease in JHE activity after fenvalerate treatment in the tested insects could partly explain the changes in the mentioned growth parameters. Whether the role of fenvalerate in the inhibition of JHE activity could serve as a new way to control DBM needs further investigation.

关键词： crucifer plants fenvalerate sublethal effect juvenile hormone esterase (JHE) diamondback moth (DBM),Plutella xylostella (L.)

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慢性心力衰竭合并原发性高血压病患者死亡预警指标研究

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中国中西医结合杂志 2024年第9期44卷 1051-1062页

作者：李润民戴国华高武霖管慧任丽丽王兴蒙曲惠文山东中医药大学第一临床医学院济南250014 山东中医药大学附属医院老年医学科济南250014 山东中医药大学附属医院急诊与重症医学科济南250014 山东中医药大学中医学院济南250014

目的基于多重支持向量机-递归特征消除(MSVM-RFE)与Cox回归分析慢性心力衰竭(心衰)合并原发性高血压病患者发生易损期心源性死亡的中西医预警指标。方法将山东省7家中医院符合研究标准的慢性心衰合并原发性高血压病患者纳入前瞻性队列研... 详细信息

目的基于多重支持向量机-递归特征消除(MSVM-RFE)与Cox回归分析慢性心力衰竭(心衰)合并原发性高血压病患者发生易损期心源性死亡的中西医预警指标。方法将山东省7家中医院符合研究标准的慢性心衰合并原发性高血压病患者纳入前瞻性队列研究,收集患者基本信息、共患病、心脏彩超、实验室检查、中医证候信息、用药记录的78项临床变量,出院3个月后随访统计终点事件。运用Cox单因素回归筛选与易损期心源性死亡显著关联的变量,将其作为潜在预警指标纳入MSVM-RFE模型,经由计算平均排序分数对指标进行重要性排序。通过效能检验评估模型错误率与精准度筛选最优预警指标子集,并运用Cox多因素回归分析预警指标的作用性质。结果共1721例患者纳入分析,包含272例易损期心源性死亡病例。将Cox单因素回归分析获得的64个潜在预警指标依据重要性排序依次纳入MSVM-RFE模型进行效能检验,当纳入前13位潜在预警指标时,模型获得最小错误率0.136与最大精准度0.864,故将其作为最优预警指标子集。Cox多因素回归分析结果显示,血浆氨基末端脑利钠肽前体(NT-ProBNP)>1000 ng/L(HR=3.65);使用血管紧张素转换酶抑制剂/血管紧张素Ⅱ受体拮抗剂(ACEI/ARB,HR=0.66);气阴两虚血瘀证(HR=1.98);面色口唇紫暗(HR=2.19);使用利尿类药物(HR=0.73);心率60次/分或100次/分(HR=1.30,HR=1.33);年龄>60岁(HR=3.64);纽约心脏病学会(NYHA)心功能分级(Ⅲ级vsⅡ级:HR=2.50,Ⅳ级vsⅡ级:HR=3.58);吸烟史(HR=1.78);收缩压140 mmHg(HR=2.56);使用活血类注射液(HR=0.64);脉滑(HR=1.32);少苔或有裂纹(HR=1.45)。结论NT-ProBNP>1000 ng/L、气阴两虚血瘀证、面色口唇紫暗、心率60或100次/分、年龄>60岁、NYHA心功能分级Ⅲ级、吸烟史、收缩压140 mmHg、脉滑、少苔或有裂纹为损害性预警指标;使用ACEI/ARB、利尿类药物、活血类注射液为保护性预警指标。MSVM-RFE与Cox回归相结合的模型适配于高维、多重共线性、小样本数据的中西医预警指标分析。

关键词：慢性心力衰竭原发性高血压病心衰易损期中西医结合预警指标多重支持向量机-递归特征消除 Cox回归分析

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Distribution of fatty acids in the alpine grassland soils of the Qinghai-Tibetan Plateau

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Science China Earth Sciences 2016年第7期59卷 1329-1338页

作者： dai guo hua ZHU Shan Shan LIU Zong Guang CHEN Li Tong HE Jin Sheng FENG Xiao Juan State Key Laboratory of Vegetation and Environmental Change Institute of Botany Chinese Academy of Sciences Key Laboratory of Adaptation and Evolution of Plateau Biota Northwest Institute of Plateau Biology Chinese Academy of Sciences Department of Ecology College of Urban and Environmental Sciences Peking University

As an important biomarker, fatty acids(FAs) have been extensively used to trace the origin of organic matter in sediments and soils. However, studies of the distribution and abundance of FAs in alpine grassland soils are still rare, especially on the Qinghai-Tibetan Plateau(QTP), the highest plateau in the world, which contributes sediments to many large rivers in Asia. This study investigates the composition, distribution and source of FAs with increasing soil depths from 17 typical alpine grassland sites in the QTP. The most abundant FAs included the ubiquitous C16 FA and even-numbered long-chain FAs(C20–C30), indicating mixed inputs from microbial and higher plant sources. Source apportionment showed that higher plants were the dominant contributor of FAs(approximately 40%) in QTP soils. The abundance of FAs decreased with soil depth, with the highest value(1.08±0.09 mg/g C) at a 0–10 cm depth and the lowest value(0.46±0.12 mg/g C) at a 50–70 cm depth, due to much lower plant inputs into the deeper horizons. The total concentration of FAs was negatively correlated to the mean annual temperature(MAT; P<0.05) and soil p H(P<0.01), suggesting that the preservation of FAs was favored in low-MAT and low-p H soils on the QTP. The abundance of fresh C source FAs increased significantly with the mean annual precipitation(MAP; P<0.05), indicating that high MAP facilitates the accumulation of fresh FAs in QTP soils. Other environmental parameters, such as the soil mineral content(aluminum and iron oxide), microbial community composition as well as litter quality and quantity, may also exert a strong control on the preservation of FAs in QTP soils and warrant further research to better understand the mechanisms responsible for the preservation of FAs in QTP soils.

关键词： Qinghai-Tibetan Plateau Soil organic matter Biomarker Fatty acids Distribution sources

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海生物对渤海导管架平台结构性能的影响

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船海工程 2024年第5期53卷 131-136页

作者：吴景健戴国华万军肖辉张梦玥吴梦宁蒋烜中海石油(中国)有限公司天津分公司渤海石油研究院天津300452

为分析附着海生物对渤海导管架平台结构性能的影响,以渤海某典型4腿平台为例,结合渤海油田导管架附着海生物现场实测数据,针对不同海生物厚度及密度对导管架结构的影响进行敏感性分析,结果表明,平台所受环境荷载随海生物厚度增加而增大... 详细信息

为分析附着海生物对渤海导管架平台结构性能的影响,以渤海某典型4腿平台为例,结合渤海油田导管架附着海生物现场实测数据,针对不同海生物厚度及密度对导管架结构的影响进行敏感性分析,结果表明,平台所受环境荷载随海生物厚度增加而增大,而海生物密度对环境荷载不产生影响;结构杆件UC值和桩头力随海生物厚度及密度的增加而增大,节点UC值随海生物厚度增加而增大,随海生物密度增加几乎没有变化;平台前三阶自振周期随海生物厚度及密度的增加而小幅增大;疲劳寿命随海生物厚度的增加逐渐降低,且几乎不受海生物密度的影响;平台极限承载力不受海生物的影响。

关键词：导管架平台海生物厚度密度自振周期疲劳寿命极限承载力

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Effect of Shenmai Injection on Long-Term Prognosis of Patients with Chronic Heart Failure:A Multicenter,Large Sample Capacity,Long-Term Follow-Up Retrospective Cohort Study

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Chinese Journal of Integrative Medicine 2022年第4期28卷 312-318页

作者： GUAN Hui dai guo-hua GAO Wu-lin ZHANG Tong SUN Cong REN Li-li HOU Xiao-ming LIU Zhang The First Clinical Medical College Shandong University of Traditional Chinese MedicineJinan250014China Affiliated Hospital of Shandong University of Traditional Chinese Medicine Jinan250011China

Objective:To explore the effect of Shenmai Injection(SMI)on the long-term prognosis of patients with chronic heart failure(CHF).Methods:The Hospital Information System was used to extract data of CHF patients,and the retrospective cohort study was conducted for *** non-exposed group,standardized Western medicine treatment and Chinese patent medicine or decoction were applied without combination of SMI while in the exposed group,SMI were applied for more than 7 *** indicators are followed with New York Heart Association functional classification(NYHA classification),left ventricular ejection fraction(LVEF),N-terminal brain natriuretic peptide precursor(NT-ProBNP),cardiogenic death and heart failure(HF)*** analysis includes Kaplan-Meier analysis and Cox regression which are used to explore the relationship between SMI and outcome ***:A total of 1,211 eligible CHF patients were involved and finally 1,047 patients were followed up *** treatment,the cases of NYHA classification decline in the exposed and non-exposed groups accounted for 64.30%and 43.45%,respectively;the improvement values of LVEF were 8.89%and 7.91%,respectively;the improvement values of NT-ProBNP were 909 pg/mL and 735 pg/mL,*** exposure on SMI,the rates of cardiogenic death and HF readmission reduced from 15.43%to 10.18%and 38.93%to 32.37%.According to Kaplan-Meier analysis,the log-rank P value of SMI and cardiogenic death was 0.014,while the counterpart of SMI and HF readmission was *** regression analysis indicated that for cardiogenic death,age,cardiomyopathy,diabetes,and NYHA classification were risk factors whileβ-blockers,aldosterone receptor antagonists,Chinese patent medicine/decoction and SMI were protective ***,for HF readmission,age,cardiomyopathy,and NYHA classification were risk factors while SMI was a protective ***:Combination with SMI on the standardized Western medicine tre

关键词： Shenmai Injection chronic heart failure cohort study outcome events long-term prognosis

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Impacts of external forcing and internal variability on the North Atlantic multidecadal variations since 1950

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Science China Earth Sciences 2024年第8期67卷 2699-2701页

作者： Wenjian hua Aiguo dai Key Laboratory of Meteorological Disaster Ministry of Education/Collaborative Innovation Center on Forecast and Evaluation of Meteorological DisastersNanjing University of Information Science and TechnologyNanjing 210044China Department of Atmospheric and Environmental Sciences University at AlbanyState University of New YorkAlbany 12222USA

The physical formation mechanisms of the Atlantic Multidecadal Variability(AMV)in the context of global warming have been a key research topic(Vecchi et al.,2017).The conventional view is that the AMV is mainly driven by internal dynamics within the climate system,especially in the Atlantic Ocean(Zhang et al.,2019).However,some studies suggest that decadal to multidecadal variations in North Atlantic sea surface temperature(SST)since around 1950 are related to anthropogenic and natural aerosol emissions(Otter?et al.,2010;Booth et al.,2012;hua et al.,2019).

关键词： Atlantic decadal forcing

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Robust Feedback Set Stabilization of Logic Networks with State-Dependent Uncertain Switching and Control Constraints

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Journal of Systems Science & Complexity 2024年第2期37卷 629-646页

作者： dai Chaoqun guo Yuqian GUI Weihua School of Automation Central South UniversityChangsha 410083China

This study investigates the robust feedback set stabilization of switched logic control networks(SLCNs)with state-dependent uncertain switching and control ***,based on the properties of the semi-tensor product of matrices and the vector representation of logic,an SLCN with state-dependent uncertain switching and control constraints is expressed in algebraic ***,an input transformation and a switching model are constructed to transfer the original SLCN into one with a free control input and arbitrary *** equivalence between the set stabilizability of the original SLCN and that of the resulting SLCN is *** on such equivalence,the authors propose a necessary and sufficient condition for robust feedback set ***,an example is presented to demonstrate the application of the results obtained.

关键词： Input transformation robust control invariant subset robust feedback set stabilizability semi-tensor product state-dependent constraints switched logic control network

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Seismic performance evaluation of water supply pipes installed in a full-scale RC frame structure based on a shaking table test

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Earthquake Engineering and Engineering Vibration 2024年第1期23卷 163-178页

作者： Wu Houli guo Endong Wang Jingyi dai Xin dai Chenxi Key Laboratory of Earthquake Engineering and Engineering Vibration Institute of Engineering MechanicsChina Earthquake AdministrationHarbin 150080China Key Laboratory of Earthquake Disaster Mitigation Ministry of Emergency ManagementHarbin 150080China

As an important part of nonstructural components,the seismic response of indoor water supply pipes deserves much *** paper presents shaking table test research on water supply pipes installed in a full-scale reinforced concrete(RC)frame *** material pipes and different methods for penetrating the reinforced concrete floors are combined to evaluate the difference in seismic *** response spectra and pipe acceleration amplification factors based on test data are discussed and compared with code provisions.A seismic fragility study of displacement demand is conducted based on numerical *** acceleration response and displacement response of different combinations are *** results show that the combination of different pipe materials and different passing-through methods can cause obvious differences in the seismic response of indoor riser pipes.

关键词： water supply pipe different materials shaking table test amplification factor seismic fragility

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Electrochemical anodic oxidation assisted fabrication of memristors

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International Journal of Extreme Manufacturing 2024年第3期6卷 250-272页

作者： Shuai-Bin hua Tian Jin Xin guo School of Materials Science and Engineering State Key Laboratory of Material Processing and Die&Mould TechnologyHuazhong University of Science and TechnologyWuhan 430074People’s Republic of China

Owing to the advantages of simple structure,low power consumption and high-density integration,memristors or memristive devices are attracting increasing attention in the fields such as next generation non-volatile memories,neuromorphic computation and data ***,the deposition of memristive films often requires expensive equipment,strict vacuum conditions,high energy consumption,and extended processing *** contrast,electrochemical anodizing can produce metal oxide films quickly(e.g.10 s) under ambient *** means of the anodizing technique,oxide films,oxide nanotubes,nanowires and nanodots can be fabricated to prepare *** film thickness,nanostructures,defect concentrations,etc,can be varied to regulate device performances by adjusting oxidation parameters such as voltage,current and *** memristors fabricated by the anodic oxidation technique can achieve high device consistency,low variation,and ultrahigh yield *** article provides a comprehensive review of the research progress in the field of anodic oxidation assisted fabrication of ***,the principle of anodic oxidation is introduced;then,different types of memristors produced by anodic oxidation and their applications are presented;finally,features and challenges of anodic oxidation for memristor production are elaborated.

关键词： anodic oxidation anodized aluminium oxide memristor resistive switching electrical properties

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Microstructure and property of laser additive manufactured alloy Ti-6Al-2V-1.5Mo-0.5Zr-0.3Si after aged at different temperatures

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Rare Metals 2024年第5期43卷 2275-2281页

作者： guo-Chao Li Xu Cheng hua-Ming Wang National Engineering Laboratory of Additive Manufacturing for Large Metallic Components and Engineering Research Center of Ministry of Education on Laser Direct Manufacturing for Large Metallic Components School of Materials Science and EngineeringBeihang UniversityBeijing 100191China

The solid solution and aging treatment for conventional manufacturing processes might not be suitable for laser additive manufactured titanium alloys due to the different lamellar *** this study,the influence of aging temperatures(600,700 and 800°C)on microstructure and mechanical properties of titanium alloy Ti-6Al-2V-1.5Mo-0.5Zr-0.3Si was *** results indicate that after solid solution treatment at 970°C followed by water quenching,the alloy mainly consists of coarsening lamellar a phase in martensite α' *** at 600°C will not change the size of primary lamellar α phase but lead to huge amount of secondary a phases(α_(s))generating with very fine *** increasing the aging temperature,the number of α_(s) decreases but with coarsened *** aged at 800°C,the width of the asphase reaches 350 nm,almost 7 times wider than that aged at 600°*** changing size of α_(s) obviously influences the property of the *** fine α_(s) leads to high strength and microhardness but low plasticity,and specimen aged at 700°C with suitable assize has the best comprehensive properties.

关键词： α+βtitanium alloy Laser additive manufacturing Solid solution and aging treatment Microstructure Room temperature tensile property

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