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A low-frequency pure metal metamaterial absorber with continuously tunable stiffness

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Applied Mathematics and Mechanics(English Edition) 2024年第7期45卷 1209-1224页

作者： Xingzhong WANG Shiteng RUI Shaokun YANG weiquan zhang Fuyin MA School of Mechanical Engineering Xi’an Jiaotong UniversityXi’an710049China Xi’an Precision Machinery Research Institute Xi’an710077China

To address the incompatibility between high environmental adaptability and deep subwavelength characteristics in conventional local resonance metamaterials,and overcome the deficiencies in the stability of existing active control techniques for band gaps,this paper proposes a design method of pure metal vibration damping metamaterial with continuously tunable stiffness for wideband elastic wave *** design a dual-helix narrow-slit pure metal metamaterial unit,which possesses the triple advantage of high spatial compactness,low stiffness characteristics,and high structural stability,enabling the opening of elastic flexural band gaps in the low-frequency *** to the principle of a sliding rheostat,the introduction of continuously sliding plug-ins into the helical slits enables the continuous variation of the stiffness of the metamaterial unit,achieving a continuously tunable band gap *** successfully extends the effective band gap by more than ten *** experimental results indicate that this metamaterial unit can be used as an additional vibration absorber to absorb the low-frequency vibration energy ***,it advances the metamaterial absorbers from a purely passive narrowband design to a wideband tunable *** pure metal double-helix metamaterials retain the subwavelength properties of metamaterials and are suitable for deployment in harsh ***,by adjusting its stiffness,it substantially broadens the effective band gap range,presenting promising potential applications in various mechanical equipment operating under adverse conditions.

关键词： elastic metamaterial absorber continuously tunable stiffness low-frequency vibration damping variable stiffness design pure metal structure

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双折射滤波片的优化参量

光学学报 2005年第10期25卷 1420-1424页

作者：张为权浙江理工大学物理系杭州310033

研究了双折射滤波片的滤波和调谐性质.利用矩阵方法和反射、透射系数,给出了波片两个界面的菲涅耳系数.利用相移公式和光线轨迹公式,由入射角和光轴方位角可计算波片精确的相移公式.将上述系数和这一波片的相移公式用于琼斯矩阵,得到透... 详细信息

研究了双折射滤波片的滤波和调谐性质.利用矩阵方法和反射、透射系数,给出了波片两个界面的菲涅耳系数.利用相移公式和光线轨迹公式,由入射角和光轴方位角可计算波片精确的相移公式.将上述系数和这一波片的相移公式用于琼斯矩阵,得到透射率的本征矩阵.该矩阵的本征值即为波片的透射系数.由此,给出了波片的主要性质(特别是透射宽度),讨论了波片参量(入射角、方位角和厚度)对波片性质的影响.利用相移公式,讨论了波片的调谐性质,并给出了选择参量的最佳范围.对石英波片,最佳参量为:厚度约在1500～2000μm,方位角大于45°,循环系数r尽可能大.在激光器增益较大时,选择较小的入射角.

关键词：光计算双折射滤波片透射宽度和调谐性质琼斯矩阵

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晶体元件的象差计算(英文)

光子学报 2005年第7期34卷 1090-1093页

作者：张为权浙江理工大学物理系杭州310033

建立了折射光线轨迹的软件包和提出了波象差的计算方法.利用这个软件包,分析了双焦透镜的各类象差和象差与入射角的关系.这个软件包的特点是各种物理量的计算十分清晰,它为改进晶体元件的设计提供了理论依据.

关键词：象差光线轨迹包双折射元件

Marsdenia tenacissima injection induces the apoptosis of prostate cancer by regulating the AKT/GSK3β/STAT3 signaling axis

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Chinese Journal of Natural Medicines 2023年第2期21卷 113-126页

作者： LI Xiaolan HE Songhua LIANG Wei zhang weiquan CHEN Xin LI Qiaofeng YANG Xin LIU Yanying ZHU Dan LI Li LIU Buming SU Zhiheng CHEN Jie GUO Hongwei Guangxi Key Laboratory of Bioactive Molecules Research and Evaluation&College of Pharmacy Guangxi Medical UniversityNanning 530021China Key Laboratory of Longevity and Aging-related Diseases of Chinese Ministry of Education&Center for Translational Medicine Guangxi Medical UniversityNanning 530021China Guangxi Institute for Food and Drug Control Drug Administration of Zhuang Autonomous RegionNanning 530021China Guangxi Key Laboratory of Traditional Chinese Medicine Quality Standards Guangxi Institute of Chinese Medicine&Pharmaceutical ScienceNanning 530022China The Affiliated Tumor Hospital Guangxi Medical UniversityNanning 530021China

Marsdenia tenacissima injection,a standard Marsdenia tenacissima extract(MTE),has been approved as an adjuvant therapeutic agent for various *** previous study showed that MTE inhibited the proliferation and metastasis of prostate cancer(PCa)***,the underlying mechanisms and active ingredients of MTE against PCa were not completely *** study revealed that MTE induced significant decreases in cell viability and clonal growth in PCa *** addition,MTE induced the apoptosis of DU145 cells by reducing the mitochondrial membrane potential and increasing the expression of Cleaved Caspase 3/7,Cyt c,and *** vivo,DU145 xenografted NOD-SCID mice treated with MTE showed significantly decreased tumor *** staining and Western blot confirmed the pro-apoptotic effects of *** pharmacology analysis collected 196 ingredients of MTE linked to 655 potential targets,and 709 PCa-associated targets were retrieved,from which 149 overlapped targets were screened *** enrichment analysis showed that the HIF-1,PI3K-AKT,and ErbB signaling pathways were closely related to tumor *** blot results confirmed that MTE increased the expression of p-AKT^(Ser473) and p-GSK3β^(Ser9),and decreased the expression of p-STAT3^(Tyr705) in vitro and in vivo.A total of 13 compounds in MTE were identified by HPLC-CAD-QTOF-MS/MS and UPLCQTOF-MS/*** docking analysis indicated that six compounds may interact with AKT,GSK3β,and *** conclusion,MTE induces the endogenous mitochondrial apoptosis of PCa by regulating the AKT/GSK3β/STAT3 signaling axis,resulting in inhibition of PCa growth in vitro and in vivo.

关键词： Marsdenia tenacissima injection Prostate cancer Apoptosis AKT/GSK3β/STAT3

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双轴晶体薄膜光学隧道效应

光子学报 1999年第4期28卷 360-363页

作者：张为权浙江丝绸工学院

本文提出了一种研究晶体薄膜光学隧道效应的方法．我们计算了在最一般情况下双轴晶体中迅衰波的复折射率和复折射角．我们也讨论了隧道效应时晶体薄膜的反射和透射系数，找到了这些系数和薄膜光学参量的关系．

关键词：光学隧道效应晶体薄膜双轴晶体迅衰波薄膜

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各种晶体界面上的全反射(英文)

光子学报 2000年第11期29卷 1040-1045页

作者：张为权黄琳浙江工程学院浙江310033 浙江工业大学

本文研究了晶体界面上的全反射 .我们如何计算迅衰波的复折射率、复折射角和复电场矢量 .还研究了全反射时的反射和透射系数 .这一方法既能应用于晶体 -晶体界面 ,也能应用于各向同性媒质 -晶体界面 .晶体可以是双轴的 ,也可以是单轴的 ... 详细信息

本文研究了晶体界面上的全反射 .我们如何计算迅衰波的复折射率、复折射角和复电场矢量 .还研究了全反射时的反射和透射系数 .这一方法既能应用于晶体 -晶体界面 ,也能应用于各向同性媒质 -晶体界面 .晶体可以是双轴的 ,也可以是单轴的 .晶体主轴的方位可以是任意的 .所以它是研究晶体界面上全反射的一般方法 .

关键词：全反射迅衰波晶体界面

氨氯地平阿托伐他汀钙片治疗高血压合并冠心病的效果分析

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中国全科医学 2018年第A2期21卷 145-147页

作者：张卫全宁夏同心县人民医院心血管内科 751300

目的分析使用氨氯地平阿托伐他汀钙片治疗高血压合并冠心病的疗效。方法筛选同心县人民医院2017年7月—2018年3月收治的54例高血压合并冠心病患者为研究对象,通过信封抽签法分为观察组和对照组,每组各27例。观察组患者口服氨氯地平阿托... 详细信息

目的分析使用氨氯地平阿托伐他汀钙片治疗高血压合并冠心病的疗效。方法筛选同心县人民医院2017年7月—2018年3月收治的54例高血压合并冠心病患者为研究对象,通过信封抽签法分为观察组和对照组,每组各27例。观察组患者口服氨氯地平阿托伐他汀钙片,对照组患者口服氨氯地平片,观察两组患者的治疗效果。结果治疗后观察组患者血压和血脂指数控制效果良好,优于对照组(P0.05)。结论氨氯地平阿托伐他汀钙片对高血压合并冠心病的治疗效果较好,血压、血脂得到有效控制,不增加不良反应发生率,临床中值得大力推广。

关键词：氨氯地平高血压冠心病

侧扫声纳图像非下采样轮廓波变换域分区增强方法

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兵工学报 2021年第7期42卷 1463-1470页

作者：武鹤龙邱政张维全 91388部队广东湛江524002

成像机理的限制以及海洋中存在的丰富噪声源,导致侧扫声纳图像出现噪声污染严重、目标和背景区域灰度值对比度低以及边缘呈现强度较弱等情况。针对上述问题,提出一种侧扫声纳图像非下采样轮廓波变换(NSCT)域分区增强方法。对于声纳图像... 详细信息

成像机理的限制以及海洋中存在的丰富噪声源,导致侧扫声纳图像出现噪声污染严重、目标和背景区域灰度值对比度低以及边缘呈现强度较弱等情况。针对上述问题,提出一种侧扫声纳图像非下采样轮廓波变换(NSCT)域分区增强方法。对于声纳图像低频部分,使用非线性函数增强方法,提升低频图像对比度;对于声纳图像高频部分,通过分析声纳高频图像在NSCT域上同一尺度不同方向子带系数最大值与最小值差值的分布规律,进行噪声和纹理边缘的划分以及对应的处理。将所提方法与小波硬阈值增强方法、小波Shrinkage自适应阈值增强方法做实验对比,结果表明,该方法不仅可以较好地消除噪声,而且可以抑制琐碎纹理、提升弱边缘,侧扫声纳图像增强效果更加突出。

关键词：侧扫声纳非下采样轮廓波变换系数差值分区增强

Transcritption regulation of soybean ribulose-1,5-bisphos-phate carboxylase small sub-unit gene by external factors

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Chinese Science Bulletin 2002年第1期47卷 37-43页

作者： HE Chaoying, WANG weiquan,DONGFANG Yang, zhang Jinsong, GAI Junyi& CHEN ShouyiPlant Biotechnology Laboratory, Institute of Genetics, Chinese Academy of Sciences, Beijing 100101, China National Center for Soybean Improvement, Soybean Research Inst Plant Biotechnology Laboratory Institute of Genetics Chinese Academy of Sciences Beijing China National Center for Soybean Improvement Soybean Research Institute Nanjing Agricultural University Nanjing China

Ribulose-l,5-bisphosphate carboxylase small subunit gene (rbcS) is present with multi-gene family in plant genome. In Glycine max, the rbcS polypeptide (EC4.***.1.39) is encoded by a gene family containing 4-8 members. Three full-length rbcS cDNA clones were isolated and characterized from soybean seedlings, and both of their nucleotide and amino acid sequences showed high similarity. Differential accumulation of the rbcS mRNA was observed among roots, hypocotyls, cotyledons, epicotyls and leaves. The rbcS genes were up-regulated by various external factors such as salicylic acid (SA), salt stress and drought stress. The expression level of rbcS genes after being treated by 2.0 mmol/L SA and0.4% NaCl, respectively, is 2.5-3.0-fold as high as that of control sample. Moreover, soybean rbcS mRNA was accu-mulated with diurnal variation but easily influenced by light and low temperature.

关键词： soybean ribulose-1 5-bisphosphate carboxylase small subunit gene (rbcS) salicylic acid water stress diurnal variation.