Results 21 to 30 of about 11,519 (169)
Guangtongxin yanjiu, 1993 本文介绍光纤局部区域网构网的一种关键器件——由2×2光纤耦合器和光纤环组成的反射型单模光纤星形耦合器的构造方法及特点。对光纤环的反射特性与耦合特性关系作理论分析。最后,报道了研制的反射型单模光纤8端口星形耦合器的实验结果。
叶爱伦, 徐毅青
doaj
Effect of different light qualities on photosynthetic characteristics and fruit quality of Shine Muscat grapevines grown under rain-sheltered cultivation [PDF]
[Objective] Light serves as a pivotal environmental regulator in plant morphogenesis and physiological adaptation. Under grape facility cultivation, particularly with rain-shelter systems, insufficient light frequently constrains photosynthetic ...
CHEN Guangxia +9 more
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Rare Metals, Volume 45, Issue 4, April 2026.ABSTRACT The development of neuromorphic electronics with visual perception and adaptive capability is highly desirable for advancing artificial vision systems. Herein, we have demonstrated a dual‐plasticity adaptive phototransistor based on IGZO nanofibers that exhibits the perception and dynamic adaptation behavior of rod and cone cells to varying ...
Shanshan Jiang +5 more
wiley +1 more source
Guangtongxin yanjiu, 2000 利用光纤 -线性啁啾光纤光栅进行光脉冲的压缩 ,首先讨论了线性啁啾光纤光栅的色散特性 ,并给出耦合系数为反高斯函数的线性啁啾光纤光栅的色散特性 ;然后利用此种光纤光栅与正常色散光纤结合进行光脉冲的压缩 ,通过理论和数值分析 ,得出一简单设计规则 ;最后利用此规则设计一个压缩因子为 1 0的光纤 -线性啁啾光纤光栅压缩器。
林宁, 张晓光, 俞重远, 杨伯君
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Guangtongxin yanjiu, 2020 针对填充液体的光子晶体光纤温度传感器灵敏度较低的问题,文章提出了一种基于模式耦合的高灵敏光子晶体光纤温度传感器,光子晶体光纤的纤芯作为传光通道,填充液态乙醇和氯仿的液芯作为耦合通道,当纤芯与液芯发生模式耦合时,纤芯的限制损耗谱会出现一个狭窄的损耗尖峰。损耗峰的位置随温度的变化而漂移。光子晶体光纤的纤芯和液芯相互独立,可以分别调整其传输特性。利用有限差分算法对传感器的特性进行了仿真研究,结果表明,设计的光纤结构具有良好的温度传感特性,耦合波长随温度升高而红移,在10～35℃范围内 ...
曾维友, 王晴岚, 徐利
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Rare Metals, Volume 45, Issue 4, April 2026.ABSTRACT MXenes have been widely investigated as microwave absorption (MA) materials because of their unique properties. This study introduces a terminal bond manipulation strategy to enhance charge transfer and polarization in Ti3C2Tx, optimizing its MA performance.
Xiang Fang +8 more
wiley +1 more source
Effects of mixed-culture densities of Spartina alterniflora on eco-physiological characteristics of Kandelia candel seedling [PDF]
, 2007 按照不同密度将互花米草与秋茄进行混种,对比研究胁迫条件下秋茄幼苗生长、光合特性及其渗透调节物质变化规律。结果表明,低密度互花米草促进秋茄的茎长以及各部分生物量,高密度则起抑制作用。随着互花米草密度的增大,秋茄幼苗叶片光合速率、气孔导度、蒸腾速率、水分利用率和蛋白含量均下降;相反,胞间CO2浓度、可溶性糖、淀粉、脯氨酸含量却上升,这些变化有利于对抗互花米草带来的不利影响。 【英文摘要】 Kandelia candel seedlings were mix-cultured with Spartina ...
何斌源 +5 more
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Rare Metals, Volume 45, Issue 4, April 2026.ABSTRACT Lightweight and lead‐free radiation shielding materials remain urgently needed. This work designed a fluorite high‐entropy oxide (FHEO) system through a combined computational–experimental route. Density functional theory based on special quasi‐random structures was used to identify thermodynamically stable fluorites from a wide compositional ...
Xiangjie Duan +9 more
wiley +1 more source
Guangtongxin yanjiu, 2011 采用数值模拟的方法研究了光纤布拉格光栅（FBG）的非线性双稳开关特性。从耦合模理论出发,利用Jacobi椭圆函数法得到了3种不同的解,首先对3种解下的非线性双稳开关特性分别进行比较,然后针对各个解下的影响开关特性的失谐量、耦合系数和光栅长度等参数进行分析,研究结果对于分析和构建非线性双稳FBG光开关具有一定的意义。
李丽君, 曹莹, 周秀丽, 于国亮
doaj
Effects of sedimentation thickness of shrimp pond cleaning discharges on Acanthus ilicifolius seedlings [PDF]
, 2012 模拟直接排入红树林的虾池清塘排出物在林地的不同沉积厚度(0、2、4、8 CM),研究其对培养424 d的红树植物老鼠簕(ACAnTHuS IlICIfOlIuS)幼苗生长和生理的影响。清塘排出物的加入对老鼠簕幼苗茎高、基径、叶片数、叶面积、生物量和相对生长率等生长指标都有显著促进作用。总体长势表现为沉积厚度8 CM>4 CM>2 CM>0 CM。生长指标显示只需少量清塘排出物的沉积(沉积厚度2 CM、4 CM)就能对幼苗的生长产生明显的促进作用,但大量排出物沉积的积累并不会带来更明显的促进作用 ...
叶勇, 李婷
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