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您的检索式：作者名="Haiguang ZHENG"
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| 1 | The radio environment of the 21 Centimeter Array:RFI detection and mitigation显示文摘Detection and mitigation of radio frequency interference(RFI) is the first and also the key step for data processing in radio observations, especially for ongoing low frequency radio experiments towards the detection of the cosmic dawn and epoch of reionization(Eo R). In this paper we demonstrate the technique and efficiency of RFI identification and mitigation for the 21 Centimeter Array(21CMA), a radio interferometer dedicated to the statistical measurement of Eo R. For terrestrial, man-made RFI, we concentrate mainly on a statistical approach by identifying and then excising non-Gaussian signatures, in the sense that the extremely weak cosmic signal is actually buried under thermal and therefore Gaussian noise. We also introduce the so-called visibility correlation coefficient instead of conventional visibility, which allows a further suppression of rapidly time-varying RFI. Finally, we briefly discuss removals of the sky RFI, the leakage of sidelobes from off-field strong radio sources with time-invariant power and a featureless spectrum. It turns out that state of the art technique should allow us to detect and mitigate RFI to a satisfactory level in present low frequency interferometer observations such as those acquired with the 21 CMA, and the accuracy and efficiency can be greatly improved with the employment of low-cost, high-speed computing facilities for data acquisition and processing. | Yah Huang Xiang-Ping Wu Qian Zheng Jun-Hua Gu Haiguang Xu | 2016 | Research in Astronomy and Astrophysics2016，16，2： | 1 |
| 2 | Analysis of Vegetable Production Trends and Dominant Varieties in Zhangjiakou City of Hebei Province显示文摘Based on the production data during 2008 and 2017 of 16 main vegetables in Zhangjiakou City of Hebei Province,the comparative advantage model was used to analyze the superior varieties in the main producing areas. The results indicate that there are seven main vegetable producing areas in Zhangjiakou City,and the development of main producing areas tends to become balanced: white radish,celery,leaf lettuce,and carrot of Shangyi,sweet pepper and tomato of Chongli,lettuce and Chinese cabbage of Kangbao,spinach,broccoli,carrots,and cauliflower of Guyuan,spinach and eggplant of Xuanhua,Chinese cabbage and lettuce of Zhangbei. These vegetables have a strong competitiveness. | Qian ZHANG Jianbin LU Feng YU Haiguang ZHENG | 2018 | Asian Agricultural Research2018，10，8： | 1 |
| 3 | Purification and characterization of a novel anti-HSV-2 protein with antiproliferative and peroxidase activities from Stellaria media显示文摘新奇抗病毒的蛋白质,指定了 A 为 Stellarmedin,从 Stellaria 媒介(L.) 被净化 Vill。(Caryophyllaceae ) 由使用铵硫酸盐降水,阳离子交换层析系统。胶化 electrophoresisanalysis 证明 Stellarmedin A 是有 35.1 kDa 的分子的重量和 8.7 的 isoelectricpoint 的高度基本的 glycoprotein。N 终端 14-amino 酸顺序, MGNTGVLTGERNDR,类似于另外的植物 peroxidases 的那些。Thisprotein 禁止了疱疹单一的病毒类型 2 (HSV-2 ) 在有 13.18 的 IC 50 的 vitro 的复制他 conformati 猸 ? 猸的低明显的免费精力吗?? | Yu Shan Yuhong Zheng Fuqin Guan Jianjian Zhou Haiguang Zhao Bing Xia Xu Feng | 2013 | Acta Biochimica et Biophysica Sinica2013，45，8： | 0 |
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