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表达印度梨形孢效应蛋白基因SIE33增强拟南芥对立枯丝核菌和盐胁迫的抗性

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植物生理学报 2023年第12期59卷 2299-2308页

作者：韩爱萍张颖琪杨子然莫红海单卫星宋银西北农林科技大学农学院陕西杨凌712100

印度梨形孢(Serendipita indica)作为有益内生真菌,寄主广泛,能够对寄主植物产生多种有益作用,如增强植物对生物和非生物胁迫的抗性,而具体作用机制报道较少。植物与微生物互作过程中存在着广泛的信号交流,包括效应蛋白在内的信号分子... 详细信息

印度梨形孢(Serendipita indica)作为有益内生真菌,寄主广泛,能够对寄主植物产生多种有益作用,如增强植物对生物和非生物胁迫的抗性,而具体作用机制报道较少。植物与微生物互作过程中存在着广泛的信号交流,包括效应蛋白在内的信号分子在植物与微生物互作过程中发挥着重要的调控作用。印度梨形孢的基因组编码500多个候选的效应蛋白,但绝大部分效应蛋白的功能未知。本研究对150个印度梨形孢效应蛋白基因转化的拟南芥材料进行了立枯丝核菌接菌分析,筛选并鉴定到一个印度梨形孢效应蛋白SIE33(*** effector 33)能提高拟南芥在立枯丝核菌接种后的存活率。结合RT-qPCR分析显示,在转SIE33拟南芥植株中,效应蛋白SIE33激活了JA/ET信号通路中LOX2、ERF1和EIN2基因的表达。此外,进一步的接菌和盐胁迫分析显示,SIE33虽没有增强拟南芥对灰霉菌和寄生疫霉的抗性,但能显著提高盐胁迫条件下拟南芥种子的萌发率。

关键词：印度梨形孢效应蛋白抗病性耐盐性

Diatomic Pd catalyst with conjugated backbone for synergistic electrochemical CO_(2)reduction

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Nano Research 2024年第6期17卷 4850-4855页

作者： Wenxuan zhang Mengran zhang Hongjuan Wang Wen zhang Min zhang MOE International Joint Laboratory of Materials Microstructure Institute for New Energy Materials and Low Carbon TechnologiesSchool of Materials Science and EngineeringTianjin University of TechnologyTianjin 300384China Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion School of Chemistry and Chemical EngineeringTianjin University of TechnologyTianjin 300384China

Double-site catalysts have attracted widespread attention in the field of electrocatalysis due to their high metal loading,adjustable active centres,and electronic valence ***,the development of bimetallic sites catalysts that coordinate with definite atoms is still in the exploratory ***,we designed and synthesized a bimetallic palladium complex(BPB-Pd_(2))with conjugated *** supported BPB-Pd_(2)was applied to electrochemical CO_(2)reduction reaction(CO_(2)RR)for the first *** as-obtained BPB-Pd_(2)gives an exceptional Faradaic efficiency of CO(FECO)of 94.4%at−0.80 V *** hydrogen electrode(RHE),which is significantly superior to monoatomic palladium catalyst(BPB-Pd1).The density functional theory(DFT)calculations revealed that the essential reason for the outstanding activity of BPB-Pd_(2)toward CO_(2)RR was that the electronic effect between diatomic palladium reduces the free energy change for CO_(2)RR ***,BPB-Pd_(2)exhibits moderate free energy change to form COOH*intermediate,which was beneficial for the generation of CO in CO_(2)RR.

关键词： synthesis electrocatalysis CO_(2)reduction bimetallic palladium complex synergistic catalysis

5G毫米波频段不同天线形式信道参数测量及对比分析

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电波科学学报 2021年第3期36卷 422-429页

作者：刘永胜侯春枝林乐科张蕊张鹦琪中国电波传播研究所青岛266107 西安电子科技大学西安710071 齐鲁理工学院济南250220

基于5G毫米波应用频段,开展了全向天线、喇叭天线以及阵列天线的信道测量与信道参数对比分析研究.利用空间交替广义期望最大化(space-alternating generalized expectation-maximization,SAGE)算法提取了多径信道参数,包括多径时延、到... 详细信息

基于5G毫米波应用频段,开展了全向天线、喇叭天线以及阵列天线的信道测量与信道参数对比分析研究.利用空间交替广义期望最大化(space-alternating generalized expectation-maximization,SAGE)算法提取了多径信道参数,包括多径时延、到达角、多径强度等,基于多径分量距离(multipath component distance,MCD)对多径分量进行了分簇结果的对比,对比分析了相同测量点处不同天线形式得到的信道参数差异.结果表明,同场景下不同天线的信道参数测量结果会有较大差别,全向天线路损指数最小,阵列天线均方根(root-mean-square,RMS)时延扩展和RMS角度扩展均最小,喇叭天线可以得到较多的簇.本文为5G毫米波频段信道建模提供了不同天线形式信道参数结果对比分析数据.

关键词： 5G 信道测量空间交替广义期望最大化(SAGE)算法分簇算法信道参数

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基于边缘引导的纺织品纹样数字化修复方法

纺织学报 2024年第2期45卷 101-111页

作者：张婧辛斌杰袁智杰许颖琦上海工程技术大学纺织服装学院上海201620

针对破损纺织品文物人工修复周期长、易造成二次破坏等问题,提出一种用改进的Criminisi算法修复破损传统纺织品纹样的数字化方法。该算法通过对缺失边缘进行重构还原纺织品纹样的结构,用于引导进一步的纹理修复。首先使用线性或二阶贝... 详细信息

针对破损纺织品文物人工修复周期长、易造成二次破坏等问题,提出一种用改进的Criminisi算法修复破损传统纺织品纹样的数字化方法。该算法通过对缺失边缘进行重构还原纺织品纹样的结构,用于引导进一步的纹理修复。首先使用线性或二阶贝塞尔曲线拟合缺失边缘,以恢复结构;然后利用多分辨率图像中的结构信息计算更有效的优先权,确定当前待修复块;再在多分辨率图像中根据颜色、梯度和边界特征计算多个候选匹配块,从中选择最佳匹配块以减少选择过程中的随机性;最后通过分割复制的最佳匹配块进行填补,以减少对已知信息区域的覆盖,迭代完成全部破损区域的修复。实验结果表明,本文算法对存在较多结构破坏的真实纺织品彩色图像可快速实现较为自然的修复效果。

关键词：纺织品文物修复图像修复多分辨率图像结构信息

N-doped graphene quantum dot-decorated N-TiO2/P-doped porous hollow g-C_(3)N_(4) nanotube composite photocatalysts for antibiotic photodegradation and H2 production

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International Journal of Minerals,Metallurgy and Materials 2024年第1期31卷 165-178页

作者： Jingshu Yuan Yao zhang Xiaoyan zhang Junjie zhang Shen’gen zhang Institute for Advanced Materials and Technology University of Science and Technology BeijingBeijing 100083China Xi’an Fanyi University Xi’an 710105China Shunde Graduate School of University of Science and Technology Beijing Foshan 528399China State Key Laboratory of Lunar and Planetary Sciences Macao University of Science and TechnologyMacao SAR 820000China

Exclusive responsiveness to ultraviolet light (~3.2 eV) and high photogenerated charge recombination rate are the two primary drawbacks of pure TiO_(2). We combined N-doped graphene quantum dots (N-GQDs), morphology regulation, and heterojunction construction strategies to synthesize N-GQD/N-doped TiO_(2)/P-doped porous hollow g-C_(3)N_(4) nanotube (PCN) composite photocatalysts (denoted as G-TPCN). The optimal sample (G-TPCN doped with 0.1wt% N-GQD, denoted as 0.1% G-TPCN) exhibits significantly enhanced photoabsorption, which is attributed to the change in bandgap caused by elemental doping (P and N), the improved light-harvesting resulting from the tube structure, and the upconversion effect of N-GQDs. In addition, the internal charge separation and transfer capability of0.1% G-TPCN are dramatically boosted, and its carrier concentration is 3.7, 2.3, and 1.9 times that of N-TiO_(2), PCN, and N-TiO_(2)/PCN(TPCN-1), respectively. This phenomenon is attributed to the formation of Z-scheme heterojunction between N-TiO_(2) and PCNs, the excellent electron conduction ability of N-GQDs, and the short transfer distance caused by the porous nanotube structure. Compared with those of N-TiO_(2), PCNs, and TPCN-1, the H2 production activity of 0.1%G-TPCN under visible light is enhanced by 12.4, 2.3, and 1.4times, respectively, and its ciprofloxacin (CIP) degradation rate is increased by 7.9, 5.7, and 2.9 times, respectively. The optimized performance benefits from excellent photoresponsiveness and improved carrier separation and migration efficiencies. Finally, the photocatalytic mechanism of 0.1% G-TPCN and five possible degradation pathways of CIP are proposed. This study clarifies the mechanism of multiple modification strategies to synergistically improve the photocatalytic performance of 0.1% G-TPCN and provides a potential strategy for rationally designing novel photocatalysts for environmental remediation and solar energy conversion.

关键词： N-doped TiO_(2) N-doped graphene quantum dots P-doped g-C_(3)N_(4) porous hollow nanotube heterojunction photocatalysis

Reversing free-electron transfer of sulfide cocatalyst for exceptional photocatalytic H_(2)evolution

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Journal of Materials Science & Technology 2024年第4期171卷 147-149页

作者： Yanfeng zhang Zhenyi zhang National Experimental Chemistry Teaching Center Hebei Key Laboratory of Inorganic Nano-materialsCollege of Chemistry and Materials ScienceHebei Normal UniversityShijiazhuang 050024China Key Laboratory of New Energy and Rare Earth Resource Utilization of State Ethnic Affairs Commission Key Laboratory of Photosensitive Materials and Devices of Liaoning ProvinceSchool of Physics and Materials EngineeringDalian Minzu UniversityDalian 116600China

Recently,Yu and co-workers deeply explore the potential impact of free electron transfer between co-catalysts and photocatalyst carriers on H_(2)evolution efficiency of active sites over MoS_(2+x).They pro-pose an electron-reversal tactics to evade the unexpected electron transfer and synchronously regulate the above transfer in a beneficial orientation for weakening hydrogen adsorption on S ***,this highlight not only discusses and summarizes the essences of electron reversal and the optimized H ad-sorption/desorption mechanism,but also emphasizes the significance of femtosecond transient absorp-tion spectroscopy(fs-TAS)and in-situ irradiated X-ray photoelectron spectroscopy(ISI-XPS)for revealing charge transfer dynamics and *** anticipate that this highlight can disseminate a new per-spective on the roles of photocatalyst carriers in improving cocatalytic H_(2)-production kinetics.

关键词： Photocatalysis Cocatalyst Electron reversal Antibonding-orbital occupancy S–H bonds

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一种基于数学形态学的灰度图象边缘检测方法

西南交通大学学报 1996年第5期31卷 555-559页

作者：张英琦何洪涛西南交通大学电气工程学院

本文用数学形态学的理论，提出了一种新的灰度图象边缘检测算法。并通过选取合适的结构元素，在微机图象处理系统上，用软件的方法加以具体实现。结果表明：这种方法算法简单，运算速度快，效果好。

关键词：图象处理边缘检测数学形态学灰度图象

Friction as energy dissipation process associated with superlubricity of solids

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Friction 2024年第9期12卷 2083-2088页

作者： Bo zhang Saga University Saga-shi 840-8502Japan

The paper shows that work in a quantum system is quantized with energy;the quantum work is equivalent to the highest eigenenergy(the Debye energy)of the system and the superlubricity of solids is derived from the quantum *** prerequisite for the superlubricity is that the lateral force at contact surfaces in sliding is less than the Debye force so that the phonon of the solids is not excited.

关键词： superlubricity phonon friction Plank law Debye frequency

头髓钉治疗高龄股骨转子间骨折的尖顶距与螺旋刀片移位的关系

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中国修复重建外科杂志 2019年第10期33卷 1234-1238页

作者：李海丰王华张英琪周家钤袁峰同济大学附属同济医院骨科

目的研究高龄股骨转子间骨折患者尖顶距(tip apex distance,TAD)与螺旋刀片移位导致内固定失败的关系。方法回顾分析2015年6月-2018年6月采用股骨近端防旋髓内钉(proximal femoral nail antirotation,PFNA)治疗的87例高龄股骨转子间骨... 详细信息

目的研究高龄股骨转子间骨折患者尖顶距(tip apex distance,TAD)与螺旋刀片移位导致内固定失败的关系。方法回顾分析2015年6月-2018年6月采用股骨近端防旋髓内钉(proximal femoral nail antirotation,PFNA)治疗的87例高龄股骨转子间骨折患者临床资料。男32例,女55例;年龄80~101岁,平均84.7岁。均为低能量损伤所致单侧新鲜闭合性股骨转子间骨折。根据国际内固定研究协会/美国骨创伤协会(AO/OTA)分型:31-A1型33例,31-A2型35例,31-A3型19例。受伤至手术时间1~16 d,平均3.7 d。根据术后即刻X线片测量TAD,按TAD大小分为A组(TAD20 mm)。比较两组骨折愈合情况及螺旋刀片移位导致内固定失败发生情况。结果根据术后即刻TAD值,A组49例,TAD为8.9~19.7 mm,平均18.6 mm;B组38例,TAD为20.1~41.4 mm,平均27.7 mm。87例患者均获随访,随访时间4~28个月,平均11.7个月。术后3例(均为B组患者)发生螺旋刀片切割移位导致内固定失败,其中1例向上切出股骨头,2例向内穿透股骨头;余84例骨折均骨性愈合,未发生内固定物断裂、股骨干骨折等内固定相关并发症。A、B组患者内固定失败发生率比较差异有统计学意义(P=0.049)。结论 PFNA内固定治疗80岁以上股骨转子间骨折患者,适当缩小螺旋刀片TAD值(15~20 mm),可以增加初始稳定,并不增加螺旋刀片移位的风险。

关键词：股骨近端防旋髓内钉股骨转子间骨折尖顶距螺旋刀片向上切出向内穿透