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走航式海洋多参数剖面测量系统(MVP)是一种集成程度和自动化程度都较高的海洋调查设备,能对多要素进行同时观测,获得高水平空间分辨率的数据资料。MVP由于温度和电导率传感器响应时间的不匹配,下放速度过快(峰值速度4m/s)而造成非常严重的盐度尖峰现象。本研究通过结合F法、GM法和Grose法提出的盐度尖峰订正方案,提出了一种新的方法Match conductivity and temperature response times法,对压力、温度和电导率传感器三者进行响应时间的匹配来减弱盐度尖峰。与SBE-9型CTD资料进行对比发现订正后的资料误差比订正前减小80%,与CTD盐度曲线互相关程度为0.917。对比35N断面修正前后的盐度资料发现订正后温盐跃层处出现的低盐区域消失,与CTD断面资料对比结果显示MVP资料比CTD资料在细结构上更具有优势。 相似文献
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本文提出了一种应用于无线功率传输系统中的新型三频分支线耦合器.通过在传统分支线耦合器的基础上加载1/4波长短路耦合线来实现3个频段的通带.每个通带之间均保持高的隔离度,且通过改变加载耦合线的奇偶模阻抗值,耦合器通带的中心频率可以在较宽频带范围内调节.对一个工作在0.69/1.0/1.4 GHz的平面三频耦合器模型进行了设计与加工,测试结果与理论期望值吻合较好. 相似文献
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基于OASIS3(Ocean Atmosphere Sea Ice Soil version 3)耦合器,耦合区域气候模式RegCM3(Regional Climate Model version 3)和海洋模式HYCOM(Hybrid Coordinate Ocean Model),建立一个区域海气耦合模式,并通过嵌套方法处理海洋模式的侧边界问题。运用该耦合模式对1982～2001年包括中国在内的东亚地区气候进行连续模拟,重点分析其对中国夏季(6～8月)降水的模拟性能。结果表明:耦合模式基本可以模拟出中国夏季降水的空间分布特征,模拟的降水量值和年际变化在靠近海洋的沿海区域比参照试验有一定程度的改善;能够再现观测夏季降水经验正交函数第一模态(EOF1)的空间分布特征,与观测EOF1的时间相关性也比参照试验有较大提高;前6个模态的组合分析也表明耦合模式对长江中下游、山东半岛、海南岛等区域夏季降水的较大时间尺度气候分量的模拟改善更显著。 相似文献
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提出了一种新型非基于慢变包络近似的三维有限元束传播法.该方法相较Hadley所提出的广角束传播法,在分析光信号与光波导之间相互作用时同时考虑了载波和调制波对传输特性的影响,更具一般性且精度更高.通过与已发表的权威文献相比,在相同的计算资源下,精度提高了10%. 相似文献
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A near-distance, nonlinear coupling relationship objectively exists between urbanization and the eco-environment. The issue of how to coordinate the relationship between them has become a global strategic and scientific issue. This study reveals the nature, relationship and intensity of coupling between urbanization and the eco-environment from a theoretical perspective. Based on the strength of coupling, relationships can be characterized as having very-low, low, medium, high, very-high or full coupling intensity, which correspond to the categories of random coupling, indirect coupling, loose coupling, cooperative coupling, close coupling, and controlled coupling. Together, these make up an urbanization and eco-environment "coupling tower." This study also develops an urbanization and eco-environment coupling circle theory and generates 45 coupling graphs(including linear, exponential-curve, logarithmic-curve, double exponential-curve and S-curve graphs) per 10° of rotation of the coupling circle, with different graphs corresponding to different urban development stages and development models. Of the various coupling graphs, the S-curve graph is considered the optimum, as it reflects the best interactivity scenario between urbanization and the eco-environment. Using an S-curve coupling graph, and with the help of an SD model and based on the complex one-to-one, one-to-many, and many-to-many relationships between the variables, this study develops the Urbanization and Eco-environment Coupler(UEC). The UEC is composed of 11 regulating elements and 201 variables. If one variable changes, it changes the whole, affecting the structure, function and regulation of the entire coupler. The UEC includes three spatio-temporal scales: static regulation between multiple urbanization areas and eco-environment areas at the same time, dynamic regulation between the same urbanization area and eco-environment area at different times, and dynamic regulation between multiple urbanization areas and eco-environment areas at different times. Regulation gradually promotes evolution from low-level coupling to high-level coupling between urbanization and the eco-environment. 相似文献
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The Main Central Thrust (MCT) and the Main Boundary Thrust (MBT) are the two major thrusts in Kumaun, the MCT forming the
boundary between highly sheared, deformed and mylonitized rocks of the Great Himalayan Central Crystallines and the Lesser
Himalayan metasedimentaries. While in the Central Crystallines four-folding episodes are observed of which two are of the
Precambrian age, the Lesser Himalayan rocks show only two phases of folding. MCT has its own distinctive structural history
and the crystalline mass comprises an integral part of peninsular India. 相似文献
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Geothermobarometry and development of inverted metamorphism in the Darjeeling-Sikkim region of the eastern Himalayan 总被引：2，自引：0，他引：2
ABSTRACT The Darjeeling-Sikkim region provides a classic example of inverted Himalayan metamorphism. The different parageneses of pelitic rocks containing chlorite, biotite, garnet, staurolite, kyanite, sillimanite, plagioclase and K-feldspar are documented by a variety of textures resulting from continuous and discontinuous reactions in the different zones. Microprobe data of coexisting minerals show that XMg varies in the order: garnet < staurolite < biotite < chlorite. White mica is a solid solution between muscovite and phengite. Garnet is mostly almandine-rich and shows normal growth zoning in the lower part of the Main Central Thrust (MCT) zone, and reverse zoning in the upper part of the zone. Chemographical relations and inferred reactions for different zones are portrayed in AFM space. In the low-grade zones oriented chlorites and micas and rolled garnets grew syntectonically, and were succeeded by cross-cutting chlorites and micas and garnet rims. In the upper zones sillimanite, kyanite and staurolite crystallized during a static inter-kinematic phase. P-T contitions of metamorphism, estimated through different models of geothermobarometry, are estimated to have been 580°c for the garnet zone to a maximum of 770°c for the sillimanite zone. The preferred values of pressure range from 5.0 kbar to 7.7 kbar. Models to explain the inverted metamorphism include overthrusting of a hot high Himalayan slab along a c. 5 km wide ductile MCT zone and the syn- or post-metamorphic folding of isograds. 相似文献
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