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| 1 | Artificially triggered lightning and its characteristic discharge parameters in two severe thunderstorms显示文摘The lightning-induced-damages in the mid-latitude regions are usually caused during severe thunder-storms. But the discharge parameters of natural lightning are difficult to be measured. Five lightning flashes have been artificially triggered with the rocket-wire technique during the passage of two severe thunderstorms. The discharge current and close electric field of return stroke in artificially triggered lightning have been obtained in microsecond time resolution by using current measuring systems and electric field change sensors. The results show that the five triggered lightning flashes include 1 to 10 return strokes, and the average return stroke current is 11.9 kA with a maximum of 21.0 kA and a mini-mum of 6.6 kA, similar to the subsequent return strokes in natural lightning. The half peak width of the current waveform is 39 μs, which is much larger than the usual result. The peak current of stroke Ip (kA) and the neutralized charge Q(C) has a relationship of Ip = 18.5Q0.65. The radiation field of return stroke is 5.9 kV·m-1 and 0.39 kV·m-1 at 60 m and 550 m, respectively. The radiation field decreases as r -1.119 with increase of horizontal distance r from the discharge channel. Based on the well-accepted transmission line model, the speed of return stroke is estimated to be about 1.4×108 m·s-1, with a variation range of (1.1―1.6)×108 m·s-1. Because of the similarities of the triggered lightning and natural lightning, the results in this article can be used in the protection design of natural lightning. | QIE XiuShu ZHANG QiLin ZHOU YunJun FENG GuiLi ZHANG TingLong YANG Jing KONG XiangZhen XIAO QingFu WU ShuJun | 2007 | Science China Earth Sciences2007，50，8： | 16 |
| 2 | A Review of Atmospheric Electricity Research in China显示文摘The importance of atmospheric electricity research has been increasingly recognized in recent decades. Research on atmospheric electricity has been actively conducted since the 1980 s in China. Lightning physics and its effects, as important branches of atmospheric electricity, have received more attention because of their significance both in scientific research and lightning protection applications. This paper reviews atmospheric electricity research based primarily on ground-based field experiments at different regions in China in the last decade. The results described in this review include physics and effects of lightning, rocket-triggered lightning and its physical processes of discharge, thunderstorm electricity on the Tibetan Plateau and its surrounding areas, lightning activity associated with severe convective storms, the effect and response of lightning to climate change, numerical simulation of thunderstorm electrification and lightning discharge, lightning detection and location techniques, and transient luminous events above thunderstorms. | QIE Xiushu ZHANG Yijun YUAN Tie ZHANG Qilin ZHANG Tinglong ZHU Baoyou LU Weitao MA Ming YANG Jing ZHOU Yunjun FENG Guili | 2015 | Advances in Atmospheric Sciences2015，32，2： | 5 |
| 3 | A gigantic jet event observed over a thunderstorm in China's Mainland显示文摘Gigantic jet(GJ) is a type of large-scaled transient discharge which occurs above thunderstorms.It connects the thunderstorms and ionosphere directly.Compared with the other transient luminous events(TLEs),gigantic jet is very difficult to be seen from the ground.We report a GJ event that was clearly recorded in eastern China(storm center located at 35.6°N,119.8°E,near the Huanghai Sea) at 20:16:22(local time) on 12 August,2010.It is by far the furthest from the equator ground-based GJ recorded over summer thunderstorm.The top altitude of this GJ was estimated to be about 89 km.The GJ-producing storm was a multi-cell thunderstorm and the GJ event occurred in the storm developing stage,with the lowest cloud-top brightness temperature about 73°C and the maximum radar echo top around 17 km.Altitudes with reflectivity of 45 dBZ were estimated to reach 12-14 km.Different from results from other countries that positive CGs(Cloud-to-ground lightnings) dominated during a time period centered at GJ,our study shows that negative CGs dominated during a time period centered at the GJ event and during most of the storm lifetime in this study,indicating a diversity of the lightning activity in the GJ-producing storms.It is interesting that two different storms produced two types of TLEs,that is,the GJ-producing storm only produced one GJ event during its lifetime and five sprites were produced over another storm,different from the other study that sprites and GJs were usually produced by the same storm,enriched the knowledge of GJ-producing storms.In addition,the GJ event in this study is located beyond the effective coverage area(30°S-30°N) of the ISUAL instruments onboard the FORMOSAT II satellite,and results of this study could be useful for GJ studies in the future. | YANG Jing FENG GuiLi | 2012 | Chinese Science Bulletin2012，57，36： | 3 |
| 4 | Expedient Synthesis of (R)-Curcuphenol: A Chiral Pool Strategy显示文摘Curcuphenol 是有多样的 bioactivities 的有趣的 sesquiterpenoid。一条简明、可伸缩的合成线路的探索仍然具有在许多不对称的全部的综合体被完成了的恶意的意义。我们从香茅醛报导(R)-curcuphenol 的有用不对称的合成,它在全面六步的合成展示二仅仅纯化操作。 | Jing Feng Guili Zhu Bo Liu Xiangdong Zhou | 2013 | Chinese Journal of Chemistry2013，31，1： | 1 |
| 5 | Protective effect of Wnt-5a against amyloid beta-induced memory impairment in rats显示文摘Recent studies suggest that the activation of the Wnt signaling pathway improves memory function in rats.This study investigated the effects of Wnt-5a on amyloid β (Aβ)-induced cognitive impairment.Aβ25-35 was injected into the rat right lateral ventricle to induce Alzheimer's disease-associated pathology,and Wnt-5a was injected as a potential therapeutic treatment.Immunofluorescence staining showed that compared with normal rats,Aβ25-35 significantly decreased postsynaptic density-95 protein expression in the rat hippocampal CA1 region,but Wnt-5a pretreatment blocked this decrease.This study shows that Wnt-5a can reduce Aβ-induced cognitive impairment,and that it has the potential to be a new therapeutic strategy for the treatment of Alzheimer's disease. | Guili Zhang Lu Lu Yaping Ge Fang Deng Ying Zhang Jiachun Feng | 2011 | Neural Regeneration Research2011，6，14： | 0 |
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