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Y-1中间砧苹果地上部不同器官与组织矿质营养分配

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北方园艺 2024年第1期 31-37页

作者：李汇斌康积玮王艳芳王骞杨廷桢郝燕燕山西农业大学园艺学院山西太谷030800 山西农业大学果树研究所山西太谷030800

以Y-1中间砧的‘烟富3号’为试材,对树体地上部枝条和果实不同器官与组织矿质元素进行测定,研究了不同器官与组织矿质营养的分配特性,以期为苹果周年生产科学施肥提供参考依据。结果表明:N、P、Mg在种子中分配占比最高,果实中占比最少;... 详细信息

以Y-1中间砧的‘烟富3号’为试材,对树体地上部枝条和果实不同器官与组织矿质元素进行测定,研究了不同器官与组织矿质营养的分配特性,以期为苹果周年生产科学施肥提供参考依据。结果表明:N、P、Mg在种子中分配占比最高,果实中占比最少;K元素含量在各器官与组织中分配差异较小,相对其他元素其在果实中积累最高;Ca元素在叶片中分配占比最高。种子中N、P、K、Mg在花后90 d时积累达到最高后处于较高水平且变化平缓;果皮中Mg元素含量分配显著高于果心和果肉;P、K、Mg元素在韧皮部中含量变化较为活跃,在花后90 d韧皮部中P、K、Mg分配均显著升高。综上可知,Y-1中间砧矮化苹果施肥管理应注重秋后基肥或花后追施N、P、Mg,果实膨大期补施K肥,在花后及果实膨大期补充Ca肥。

关键词： Y-1中间砧矮化苹果矿质元素营养分配

骨髓源性生长因子缺失导致小鼠心肌梗死后纤维化加剧

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四川大学学报（医学版） 2024年第4期55卷 886-892页

作者：韩国玲郝琰琰李若朴刘维静刘俊聂宇白丽娜王玉瑶山西医科大学基础医学院生物化学与分子生物学教研室太原030001 北京协和医学院中国医学科学院阜外医院国家心血管病中心心血管疾病国家重点实验室北京100037

目的研究心梗后骨髓源性生长因子(myeloid-derived growth factor, Mydgf)的缺失对心肌成纤维细胞活化的作用。方法取成年野生型(wild type, WT)小鼠与Mydgf敲除(myeloid-derived growth factor knockout, Mydgf-KO)小鼠,检验这两组小鼠的心功能指标左室射血分数(left ventricular ejection fraction, LVEF)和左室短轴缩短率(left ventricular fractional shortening, LVFS)(n=10),实时定量PCR(quantitative real-time PCR, qRT-PCR)(n=3)检测肌成纤维细胞标志物α-平滑肌肌动蛋白(α-SMA)、骨膜蛋白(postn)、Ⅷ型胶原(typeⅧcollagen, col8al)、结缔组织生长因子(connective tissue growth factor, ctgf)的mRNA表达水平,Western blot(n=3)检测肌α-SMA的蛋白表达水平;对WT与Mydgf-KO小鼠造心肌梗死(myocardial infarction, MI)模型,检测小鼠术后LVEF和LVFS(n=10),取出心脏后进行Masson染色测定梗死面积(n=10)。分别在MI后第7天、第14天收集Mydgf-KO及WT小鼠的心脏,验证肌成纤维细胞标志物(n=3)的表达情况。结果相较于WT小鼠,Mydgf-KO成年小鼠LVEF、LVFS无明显变化(P均>0.05),但α-SMA和postn的mRNA水平上调,α-SMA蛋白表达水平增加(P均<0.05);MI后,与WT小鼠相比,Mydgf-KO小鼠LVEF、LVFS下降,且梗死面积增大(P均<0.05);进一步发现,Mydgf-KO小鼠α-SMA、col8al、postn和ctgf的mRNA水平升高,同时α-SMA蛋白表达水平上调且α-SMA阳性的成纤维细胞增加(P均<0.05)。结论 Mydgf缺失促使心脏成纤维细胞转变为肌成纤维细胞,同时也加剧心梗后的纤维化。

关键词：骨髓源性生长因子心肌纤维化心肌梗死肌成纤维细胞

Suppress oxygen evolution of lithium-rich manganese-based cathode materials via an integrated strategy

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Green Energy & Environment 2024年第1期9卷 138-151页

作者： Wenhua Yu yanyan Wang Aimin Wu Aikui Li Zhiwen Qiu Xufeng Dong Chuang Dong hao Huang Key Laboratory of Energy Materials and Devices(Liaoning Province) School of Materials Science and EngineeringDalian University of TechnologyDalian116024Liaoning ProvinceChina Dalian Engineering Research Center for New Electric Power Systerms School of Electrical EngineeringDalian University of TechnologyDalian116024Liaoning ProvinceChina

Improving the reversibility of anionic redox and inhibiting irreversible oxygen evolution are the main challenges in the application of high reversible capacity Li-rich Mn-based cathode materials.A facile synchronous lithiation strategy combining the advantages of yttrium doping and LiYO_(2) surface coating is *** doping effectively suppresses the oxygen evolution during the delithiation process by increasing the energy barrier of oxygen evolution reaction through strong Y–O bond ***_(2) nanocoating has the function of structural constraint and protection,that protecting the lattice oxygen exposed to the surface,thus avoiding irreversible *** an Li^(+) conductor,LiYO_(2) nano-coating can provide a fast Li^(+) transfer channel,which enables the sample to have excellent rate *** synergistic effect of Y doping and nano-LiYO_(2) coating integration suppresses the oxygen release from the surface,accelerates the diffusion of Li^(+)from electrolyte to electrode and decreases the interfacial side reactions,enabling the lithium ion batteries to obtain good electrochemical *** lithium-ion full cell employing the Y-1 sample(cathode)and commercial graphite(anode)exhibit an excellent specific energy density of 442.9 Wh kg^(-1) at a current density of 0.1C,with very stable safety performance,which can be used in a wide temperature range(60 to-15℃)stable *** result illustrates a new integration strategy for advanced cathode materials to achieve high specific energy density.

关键词： Lithium-rich manganese-based cathodes Lithium ion batteries Oxygen redox Oxygen evolution Integrated strategy

超声清创结合光子治疗在慢性创面治疗中的应用

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现代医药卫生 2024年第10期40卷 1683-1686页

作者：王红玉郝艳艳曾满琴李红莉曾洁杨雅上海市徐汇区大华医院伤口护理门诊上海200237 上海市徐汇区大华医院护理部上海200237

目的探讨超声清创结合光子治疗在慢性创面治疗中的临床应用效果。方法选取2021年10月至2022年12月上海市徐汇区大华医院伤口护理门诊收治的慢性创面患者40例,进行前瞻性随机对照研究。采用随机数字表法将其分为对照组和研究组,每组20例... 详细信息

目的探讨超声清创结合光子治疗在慢性创面治疗中的临床应用效果。方法选取2021年10月至2022年12月上海市徐汇区大华医院伤口护理门诊收治的慢性创面患者40例,进行前瞻性随机对照研究。采用随机数字表法将其分为对照组和研究组,每组20例。对照组患者中男8例,女12例;平均年龄(62±17)岁;24个创面。研究组患者中男9例,女11例;平均年龄(65±12)岁;26个创面。对照组采用机械清创方法,即用手术刀、血管钳、刮匙将坏死组织、不健康的肉芽组织清除等。研究组在机械清创方法基础上采用超声清创机对伤口进行清创后给予光子治疗。2组患者根据伤口情况首次清创后前3天每天用上述方法清创,后根据伤口情况改为2~3 d换药1次。比较2组患者首次清创后7、14、21、28、60 d伤口愈合率,首次清创后创面细菌培养阳性率,清创时及清创后疼痛评分,首次清创后换药次数及费用等。结果研究组患者首次清创后7、14、21、28、60 d伤口愈合率均明显高于对照组,首次清创后创面细菌培养阳性率明显低于对照组,差异均有统计学意义(P0.05);研究组患者清创中及清创后疼痛评分均明显低于对照组,换药次数明显少于对照组,差异均有统计学意义(P0.05)。结论采用超声清创结合光子术治疗慢性创面较传统外科清创方法的疗效更佳,创面愈合时间短,疼痛轻,感染控制效果好,且能减少换药频次,从而降低换药费用。

关键词：超声清创光子治疗慢性创面治疗结果

Strongly secure identity-based authenticated key agreement protocols in the escrow mode

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Science China(Information Sciences) 2013年第8期56卷 189-202页

作者： NI Liang CHEN GongLiang LI JianHua hao yanyan School of Information Security Engineering Shanghai Jiaotong University Experiment Management Center Zhongzhou University

Escrowable identity-based authenticated key agreement(AKA) protocols are desirable under certain circumstances especially in certain closed groups *** this paper,we focus on two-party identitybased AKA schemes in the escrow mode,and present a strongly secure escrowable identity-based AKA protocol which captures all basic desirable security properties including perfect forward secrecy,ephemeral secrets reveal resistance and so *** protocol is provably secure in the extended Canetti-Krawczyk model,and its security can be reduced to the standard computational bilinear Diffie-Hellman assumption in the random oracle *** no adversary can obtain the master private key for the escrow mode,our scheme is secure as long as each party has at least one uncompromised ***,we present two strongly secure variants of the protocol,which are computationally more efficient than the original scheme.

关键词： authenticated key agreement identity-based cryptography key escrow provable security bilinear Diffie-Hellman assumption

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风力机弧形叶片参数化及气弹特性分析研究

可再生能源 2023年第9期41卷 1202-1207页

作者：郝艳艳汪泉河南工业贸易职业学院河南郑州450000 湖北工业大学湖北武汉430068

为了满足自适应叶片的发展,文章提出了一种弧形叶片的参数化方法。该方法基于微分几何曲线理论,结合Bézier曲线和直叶片的参数化方法,达到了由控制点来控制弧形叶片几何外形的目的。基于弧形叶片的特点,将二维叶素理论转换到弧形叶片... 详细信息

为了满足自适应叶片的发展,文章提出了一种弧形叶片的参数化方法。该方法基于微分几何曲线理论,结合Bézier曲线和直叶片的参数化方法,达到了由控制点来控制弧形叶片几何外形的目的。基于弧形叶片的特点,将二维叶素理论转换到弧形叶片的截面上,并进行气动载荷计算,从而改进了叶素动量理论(BEM)。以NREL5MW风力机叶片为基准叶片,通过控制空间参考线控制向量可以得到具有预弯/扫掠特性的弧形叶片。结合改进的BEM理论和气动弹性理论,研究了该弧形叶片与参考叶片的气弹特性。研究结果表明:相比常规叶片,具有预弯/扫掠特性的弧形叶片能够有效地降低叶片的疲劳载荷和变桨载荷。该结果为设计具有减载功能的自适应叶片提供了一种可行的思路。

关键词：弧形叶片曲线理论 Bézier曲线改进BEM 气弹分析

Enhancing SAEAs with unevaluated solutions:a case study of relation model for expensive optimization

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Science China(Information Sciences) 2024年第2期67卷 41-58页

作者： hao hao Xiaoqun ZHANG Aimin ZHOU Institute of Natural Sciences Shanghai Jiao Tong University Shanghai Frontiers Science Center of Molecule Intelligent Syntheses School of Computer Science and Technology East China Normal University

Surrogate-assisted evolutionary algorithms(SAEAs) hold significant importance in resolving expensive optimization problems. Extensive efforts have been devoted to improving the efficiency of SAEAs through the development of proficient model-assisted solution selection methods, which, however, first requires generating high-quality solutions. The fundamental paradigm of evaluating a limited number of solutions in each generation within SAEAs reduces the variance of adjacent populations, thereby affecting the quality of offspring solutions. This is a frequently encountered issue yet receives little attention. To address the issue, this paper presents a framework using unevaluated solutions to enhance the efficiency of *** surrogate model is employed to identify high-quality solutions for the direct generation of new solutions without evaluation. To ensure dependable selection, we have introduced two tailored relation models to select the optimal solution and the unevaluated population. A comprehensive experimental analysis is performed on two test suites, which showcases the superiority of the relation model over regression and classification models in the solution selection phase. Furthermore, the surrogate-selected unevaluated solutions with high potential have been shown to enhance the efficiency of the algorithm significantly.

关键词： expensive optimization unevaluated solutions relation model surrogate-assisted evolutionary algorithm

A Global Optimality Principle for Fully Coupled Mean-field Control Systems

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Acta Mathematicae Applicatae Sinica 2024年第2期40卷 379-413页

作者： Tao hao School of Statistics and Mathematics Shandong University of Finance and EconomicsJinan 250014China

This paper concerns a global optimality principle for fully coupled mean-field control *** the first-order and the second-order variational equations are fully coupled mean-field linear FBSDEs. A new linear relation is introduced, with which we successfully decouple the fully coupled first-order variational equations. We give a new second-order expansion of Y^(ε) that can work well in mean-field framework. Based on this result, the stochastic maximum principle is proved. The comparison with the stochastic maximum principle for controlled mean-field stochastic differential equations is supplied.

关键词： optimal control global maximum principle fully coupled general mean-field FBSDE adjoint equation recursive utility

Effect of CO_(2) Opposing Multiple Jets on Thermoacoustic Instability and NO_(x) Emissions in a Lean-Premixed Model Combustor

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Journal of Thermal Science 2024年第1期33卷 207-221页

作者： ZHOU hao HU Liubin Institute for Thermal Power Engineering State Key Laboratory of Clean Energy UtilizationZhejiang UniversityHangzhou 310027China

This paper experimentally studied the effect of CO_(2) opposing multiple jets on the thermoacoustic instability and NO_(x) emissions in a lean-premixed model *** feasibility was verified from three variables:the CO_(2) jet flow rate,hole numbers,and hole diameters of the *** indicate that the control effect of thermoacoustic instability and NO_x emissions show a reverse trend with the increase of open area ratio on the whole,and the optimal jet flow rate range is 1-4 L/min with CO_(2) opposing multiple *** this flow rate range,the amplitude and frequency of the dynamic pressure and heat release signals CH~* basically decrease as the CO_(2) flow rate increases,which avoids high-frequency and high-amplitude thermoacoustic *** amplitude-damped ratio of dynamic pressure and CH*can reach as high as 98.75% and 93.64% with an optimal open area ratio of 3.72%.NO_(x) emissions also decrease as the jet flow rate increases,and the maximum suppression ratio can reach 68.14%.Besides,the flame shape changes from a steep inverted "V" to a more flat "M",and the flame length will become shorter with CO_(2) opposing multiple *** research achieved the synchronous control of thermoacoustic instability and NO_(x) emissions,which could be a design reference for constructing a safer and cleaner combustor.

关键词： thermoacoustic instability lean-premixed model combustor CO_(2)opposing multiple jets open area ratio NO_(x)emissions