According to the development situation of global Sports Park,the construction ideas of Sports Park were abstracted, which could be used for reference in China.Meanwhile,with the analysis of the development situation of Sports Park in our country,some concerns and suggestions were put forward.
Objective To develop a determination method of germacrone in the Folium Rhododendri daurici and determined samples which brought from different area in province of Heilingjiang and from different month of one area.Methods HPLC method was used with column of the Zorbax RX-C18柱(150 mm×4.6 mm,5μm)and the mobile phase of 65%acetonitrile.The velocity of flow was 1.0 ml/min and detection wavelength at 210nm.Results The linear range of germacrone is from 0.030 24μg to 3.024μg.(r=1.000).The recovery was 98.6%～101.5%with RSD of 1.3%～0.6%.The germacrone contents of the different area varied from 0.010 7 to 7.286 2 mg/g,while the different month reached 1.5 times.Conclusion The establishedmethod is accurate and reproducible,can be used for the determination of germacrone in Folium Rhododendri daurici.The content of germacrone was obvious difference for the 13 area's samples and was relatively near for the samples of 6 months.
The emergence of sea surface current has a significant impact on electromagnetic (EM) backscattering signals. This may be one of important synthetic aperture radar (SAR) imaging mechanisms of ocean currents. Fractal sea surface ocean wave-current model is derived based on the mechanism of wave current interaction in this paper. A effective EM backscattering model of one dimensional drifting fractal sea surface is presented. numerical results show that both magnitude and direction of ocean current have effects on EM backscattering signals from one dimensional ocean wave-current coupled fractal sea surface. The existence of ocean currents which paralleling to the direction of wave can weaken EM backscattering signal intensity. EM backscattering signal intensity can be strengthened by ocean currents propagating in the opposing direction of wave.
The Granites are extensively exposed in the Yuechengling-Miaoershan region,ranging in age from Caledonian to Yanshannian.This suit is comprised of middle-fine-grained biotite-granites,fine-grained muscovite-biotite-granites and fine-grained muscovite-granites which are rich in silica,alkalis,aluminum,high evolution and high differentiation.The granites are K2O rich and Na2O poor and W-Sn-Pb-Bi-rich rocks.W-Sn-Mo metallogenesis is correlated to early Yanshannian granites in the area.The majority of deposits have developed around the fine-grained granites and near the wall rock contact with the fine-grained granites.
The area of nonwood forest was 30 million hm2 by the end of 2006 in China.The output value was 2 550.70 billion RMB Yuan in 2006,which occupied 23.95% of the whole forestry output in China.Background of nonwood forest concept was introduced,and the concept was interpreted,based on status analysis of nonwood forest in China.Modern development and scientific development concepts lead modern nonwood forest concept.Modern nonwood forest is composed of modern industry system and advanced technology application system,and it is a sustainable project making our country strengthening and the people well-off.
Understanding the response of tropospheric ozone (O3) to nitrogen dioxide (NO2) change is important for local O3 control. The relationship between O3 and NO2 at county scale in China has been extensively studied using models, but there is a lack of results from direct measurements. In this study, we used measurements of O3, NO2 and meteorological conditions from a dense network in the Yangtze River Delta (YRD), and satellite observed formaldehyde (HCHO) and NO2 column densities for the analysis of O3 variabilities and its relationship to NO2. As a result, severe O3 pollution occurred mainly in Shanghai city, southern Jiangsu and northern Zhejiang provinces in YRD during April–September. In addition, meteorological conditions could explain 54% the diurnal O3 variation over YRD. During April–September 2015–2021, O3 showed a significant positive relationship (r = 0.61 ± 0.10) with NO2 after removing the impact from meteorological conditions. However, the relationship could be reversed with NO2 concentration change. Our result suggested that the controllable O3 related to NO2 change is up to 100 μg·m−3 in megacities over Shanghai and northern Zhejiang province. The O3 is much more sensitive to the NO2 reduction in megacities than surrounding areas. Our results evaluate the different impacts of NO2 changes on O3 formation, which provides explanation for the simultaneously alleviated O3 pollution and reduced NO2 in 2020 in Shanghai and northern Zhejiang, as well as the increased O3 in most counties before 2019 with reduced NO2 during October–March. The driving mechanism as revealed from this study for O3 and NO2 will be valuable for the O3 abatement through NO2 reduction at sub-county scale over YRD in China.
The layered migmatites of boron deposit in east Liaoning is an important component part of the boron-bearing strata,which conformably contactes with various granulites and leucolepitites,and shows transition in lithofacies.Residual crossbedding can be observed within transitional layers between striated hornblende migmatites and granulites.There are widely developed metasomatic textures.Compared with the metamorphic well-rocks,the major elements such as SiO2,K2O and Na2O are significantly increased,meanwhile such as Fe2O3+FeO,CaO,MgO and MnO are distinctly decreased,K2O/Na2O is in complex change.The difference among petrochemical compositions in the layered migmatites is obvious and is related to metasomatism.Trace element distribution of migmatites is similar to that of metamorphic well-rocks,except that their REE content is higher than that of wall-rocks.The distributed pattern of REE is consistent with granulites,especially biotiteleptynite,and is of representative anatexis characteristics.The reason for this is that part of granulites melted and formed the layered migmatites.So the results indicated that the layered migmatites are produced by anatexis and metasomatism of metamorphic wall-rocks.
Synthetic Aperture Radar (SAR) imagery plays an important role in observing tropical cyclones (TCs). However, the C-band attenuation caused by rain bands and the problem of signal saturation at high wind speeds make it impossible to retrieve the fine structure of TCs effectively. In this paper, a dual-level contextual attention generative adversarial network (DeCA-GAN) is tailored for reconstructing SAR wind speeds in TCs. The DeCA-GAN follows an encoder–neck–decoder architecture, which works well for high wind speeds and the reconstruction of a large range of low-quality data. A dual-level encoder comprising a convolutional neural network and a self-attention mechanism is designed to extract the local and global features of the TC structure. After feature fusion, the neck explores the contextual features to form a reconstructed outline and up-samples the features in the decoder to obtain the reconstructed results. The proposed deep learning model has been trained and validated using the European Centre for Medium-Range Weather Forecasts (ECMWF) atmospheric model product and can be directly used to improve the data quality of SAR wind speeds. Wind speeds are reconstructed well in regions of low-quality SAR data. The root mean square error of the model output and ECMWF in these regions is halved in comparison with the existing SAR wind speed product for the test set. The results indicate that deep learning methods are effective for reconstructing SAR wind speeds.
This paper analyzed the characteristics of the planning and design of the open space at the 6th China (Xiamen) International Garden Flower EXPO Park.It explored the formation of a diversified but harmonious landscape in the large exhibition site.The landscape not only represents the local culture and site spirits but also meets the requirements of sustainable development.
'/%3e%3cuse xlink:href='%23a' transform='rotate(23.036 .093 25.536)'/%3e%3cuse xlink:href='%23a' transform='rotate(45.87 1.273 16.18)'/%3e%3cuse xlink:href='%23a' transform='rotate(69.945 .996 12.078)'/%3e%3cuse xlink:href='%23a' transform='rotate(20.66 -19.689 31.932)'/%3e%3c/svg%3e)
