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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 | Combined use of phospholipid complexes and self-emulsifying microemulsions for improving the oral absorption of a BCS class IV compound, baicalin显示文摘The aim of this study was to develop a formulation to improve the oral absorption of baicalin(BA)by combining a phospholipid complex(PC)and self-emulsifying microemulsion drug delivery system(SMEDDS),termed BA–PC–SMEDDS.BA–PC was prepared by a solvent evaporation method and evaluated by complexation percentage(CP).The physicochemical properties of BA–PC were determined.The synergistic effect of PC and SMEDDS on permeation of BA was studied in vitro with Caco-2 cells and in situ with a single pass intestinal perfusion model.The improved bioavailability of BA in BA–PC–SMEDDS was confirmed in an in vivo rat model.The CP of BA–PC reached 100%when the molar ratio of drug to phospholipid(PP)was Z1:1.The solubility of BA–PC increased in both water and octanol,and the log P o/w of BA–PC was increased significantly.BA–PC–SMEDDS could be dispersed more evenly in water,compared to BA and BA–PC.Both the Caco-2 cell uptake and single-pass intestinal perfusion models illustrated that transport of BA in BA–PC was lower than that of free BA,while improved significantly in BA–PC–SMEDDS.The relative bioavailability of BA–PC(1:2)–SMEDDS was 220.37%.The combination system of PC and SMEDDS had a synergistic effect on improving the oral absorption of BA. | Huiyi Wu Xiaoying Long Fei Yuan Li Chen Sujing Pan Yunjun Liu Yoshiko Stowell Xiaoling Li | 2014 | Acta Pharmaceutica Sinica B2014，4，3： | 14 |
| 3 | QTG-Seq Accelerates QTL Fine Mapping through QTL Partitioning and Whole-Genome Sequencing of Bulked Segregant Samples显示文摘Deciphering the genetic mechanisms underlying agronomic traits is of great importance for crop improvement. Most of these traits are controlled by multiple quantitative trait loci (QTLs), and identifying the underlying genes by conventional QTL fine-mapping is time-consuming and labor-intensive. Here, we devised a new method, named quantitative trait gene sequencing (QTG-seq), to accelerate QTL fine-mapping. QTGseq combines QTL partitioning to convert a quantitative trait into a near-qualitative trait, sequencing of bulked segregant pools from a large segregating population, and the use of a robust new algorithm for identifying candidate genes. Using QTG-seq, we fine-mapped a plant-height QTL in maize (Zea mays L.), qPH7, to a 300-kb genomic interval and verified that a gene encoding an NF-YC transcription factor was the functional gene. Functional analysis suggested that qPH7-encoding protein might influence plant height by interacting with a CO-like protein and an AP2 domain-containing protein. Selection footprint ana卜 ysis indicated that qPH7 was subject to strong selection during maize improvement. In summary, QTG-seq provides an efficient method for QTL fine-mapping in the era of “big data'. | Hongwei Zhang Xi Wang Qingchun Pan Pei Li Yunjun Liu Xiaoduo Lu Wanshun Zhong Minqi Li Linqian Han Juan Li Pingxi Wang Dongdong Li Yan Liu Qing Li Fang Yang Yuan-Ming Zhang Guoying Wang Lin Li | 2019 | Molecular Plant2019，12，3： | 13 |
| 4 | Minor alloying behavior in bulk metallic glasses and high-entropy alloys显示文摘The effect of minor alloying on several bulk metallic glasses and high-entropy al-loys was studied. It was found that minor Nb addition can optimize the interface structure between the W fiber and the Zr-based bulk metallic glass in the compos-ites,and improve the mechanical properties. Minor Y addition can destabilize the crystalline phases by inducing lattice distortion as a result to improve the glass-forming ability,and the lattice distortion energy is closely related to the effi-ciency of space filling of the competing crystalline phases. A long-period ordered structure can precipitate in the Mg-based bulk metallic glass by yttrium alloying. For the high-entropy alloys,solid solution can be formed by alloying,and its me-chanical properties can be comparable to most of the bulk metallic glasses. | ZHANG Yong ZHOU YunJun HUI XiDong WANG MeiLing CHEN GuoLiang | 2008 | Science China(Physics,Mechanics & Astronomy)2008，51，4： | 10 |
| 5 | Preparation and characterization of Al/B/Fe_2O_3 nanothermites显示文摘A sol-gel synthetic approach combined with an ultrasonic method was utilized to prepare Al/B/Fe2O3 nanothermites.The structure and properties of the prepared nanothermites were characterized by thermogravimetric analysis,differential scanning calorimetry,scanning electron microscopy,X-ray diffraction,and an impact sensitivity test.The results verified that the nano-aluminum and the micro-boron were uniformly dispersed in the pores of the iron oxide gel.The heat of the prepared Al/B/Fe2O3 nanothermites was 1.3 times that of the simple physically mixed sample.In addition,the heat of the combustion test showed that these materials were indeed energetic.Small-scale safe experiments also showed that the prepared materials through sol-gel were relatively insensitive to standard impact. | SHEN LianHua LI GuoPing LUO YunJun GAO Kun GE Zhen | 2014 | Science China Chemistry2014，57，6： | 6 |
| 6 | Effect of component substitution on the microstructure and mechanical properties of MCoCrFeNiTi_x (M = Cu, Al) solid-solution alloys显示文摘MCoCrFeNiTix (M = Cu, Al; x: molar ratio, x = 0, 0.5) alloys were prepared using the new alloy-design strategy of equal-atomic ratio and high entropy. By the component substitution of Al for Cu, the microstructure changes from the face-centered cubic solid solution of original CuCoCrFeNiTix alloys to the body-centered cubic solid solution of AlCoCrFeNiTix alloys. Compared with original CuCoCrFeNiTix alloys, AlCoCrFeNiTix alloys keep the similar good ductility and simultaneously possess a much higher compressive strength, which are even supe- rior to most of the reported high-strength alloys like bulk metallic glasses. | ZHOU Yunjun ZHANG Yong WANG Xuefei WANG Yanli CHEN Guoliang | 2008 | Rare Metals2008，27，6： | 5 |
| 7 | The U6 Biogenesis-Like I Plays an Important Role in Maize Kernel and Seedling Development by Affecting the 3' End Processing of U6 snRNA显示文摘 | Jiankun Li Junjie Fu Yan Chen Kaijian Fan Cheng He Zhiqiang Zhang Li Li Yunjun Liu Jun Zheng Dongtao Ren Guoying Wang | 2017 | Molecular Plant2017，10，3： | 5 |
| 8 | 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 |
| 9 | Ferrimagnetic m PEG-b-PHEP copolymer micelles loaded with iron oxide nanocubes and emodin for enhanced magnetic hyperthermia–chemotherapy显示文摘As a non-invasive therapeutic method without penetration-depth limitation,magnetic hyperthermia therapy(MHT)under alternating magnetic field(AMF)is a clinically promising thermal therapy.However,the poor heating conversion efficiency and lack of stimulus–response obstruct the clinical application of magnetofluid-mediated MHT.Here,we develop a ferrimagnetic polyethylene glycol-poly(2-hexoxy-2-oxo-1,3,2-dioxaphospholane)(m PEG-b-PHEP)copolymer micelle loaded with hydrophobic iron oxide nanocubes and emodin(denoted as EMM).Besides an enhanced magnetic resonance(MR)contrast ability(r2=271 m M^-1 s^-1)due to the high magnetization,the specific absorption rate(2518 W/g at 35 k A/m)and intrinsic loss power(6.5 n Hm2/kg)of EMM are dozens of times higher than the clinically available iron oxide nanoagents(Feridex and Resovist),indicating the high heating conversion efficiency.Furthermore,this composite micelle with a flowable core exhibits a rapid response to magnetic hyperthermia,leading to an AMF-activated supersensitive drug release.With the high magnetic response,thermal sensitivity and magnetic targeting,this supersensitive ferrimagnetic nanocomposite realizes an above 70%tumor cell killing effect at an extremely low dosage(10μg Fe/m L),and the tumors on mice are completely eliminated after the combined MHT–chemotherapy. | Yonghong Song Dongdong Li Yang Lu Kun Jiang Yi Yang Yunjun Xu Liang Dong Xu Yan Daishun Ling Xianzhu Yang Shu-Hong Yu | 2020 | National Science Review2020，7，4： | 4 |
| 10 | Maize MS2 encodes an ATP-binding cassette transporter that is essential for anther development显示文摘The anther cuticle and pollen exine play a critical role in male gametophyte development. The sporopollenin precursors and cuticular lipid monomers are transported to the surface of the microspores and the epidermis by lipid transport proteins(LTPs) and ATP-binding cassette G(ABCG) transporters for the formation of the pollen wall and anther cuticle, respectively. However, the function of ABCG transporters in maize anther development is unclear. Here, we cloned the MS2 gene from the maize male sterile2 mutant using map-based cloning and determined that it encodes an ABCG transporter. MS2 protein was experimentally confirmed to be located on the cell membrane. The quantitative real-time PCR(qRT-PCR)results showed that MS2 was ubiquitously expressed in all vegetative and reproductive tissues, whereas a high transcriptional level of MS2 was observed in anthers, especially at the young microspore stage. Gas chromatography-mass spectrometry(GC–MS) analysis showed decreased accumulation of cutin and wax components in ms2 anthers, indicating that MS2 plays a role in the transport of lipid molecules to anther cuticle and pollen exine. To our knowledge, MS2 is the first reported ABCG transporter gene that participates in anther development in maize. | Qilong Xu Li Yang Dan Kang Zhenjing Ren Yunjun Liu | 2021 | The Crop Journal2021，9，6： | 4 |
| 11 | Methods of Studying Petroleum Systems in Residual Basins-A Case Study of Mesozoic and Palaeozoic MarineBasins in Southern China显示文摘 | ZHAO Zongju, ZHU Yan, YANG Shufeng, WANG Genghai,XU Yunjun, FENG Jialiang and DENG Hongying Department of Geoscience, Zhejiang University, Hangzhou 310027, Zhejiang Hangzhou Institute of Petroleum Geology, Hangzhou 310023, Zhejiang Zhou Jian Fei Zhenbi | 2002 | Acta Geologica Sinica(English Edition)2002，76，2： | 4 |
| 12 | Mechanical and thermal properties of mesogen-jacketed liquid crystalline polymer/epoxy resin composites显示文摘The effects of mesogen-jacketed liquid crystalline polymer poly(dipropyl vinylterephthalate)(PDPVT) on the mechanical and thermal properties of diglycidyl ether of bisphenol-A(DGEBA) epoxy resin were investigated by impact test, tensile test and thermogravimetric analysis(TGA). The mechanism underlying the enhancement of mechanical properties of epoxy resin was studied using 1D wide-angle X-ray diffraction(WAXD) and scanning electron microscope(SEM). It was found that the mechanical properties of 1 wt%–5 wt% PDPVT/DGEBA composites were significantly improved compared to neat epoxy resin. Especially, the epoxy resin with 3 wt% PDPVT had the greatest increase in mechanical properties, with the impact strength, tensile strength and elongation while breaking increased by 87%, 59% and 174%, respectively. The increased mechanical strength was due to the fact that PDPVT maintained liquid crystalline phase in cured PDPVT/DGEBA composites, which would blunt the crack tip and prevent crack propagation. Moreover, PDPVT had slight effect on the thermal stability properties of epoxy resin. | Chunpeng Chai Fangfang Yin Guoping Li Yunjun Luo | 2015 | Science China Chemistry2015，58，6： | 3 |
| 13 | Electromotive Force Calculation of Fifteen-phase Induction Motors With Non-sinusoidal Supply显示文摘非正弦供电十五相感应电机基波磁动势正幅值与3次谐波磁动势负幅值不在同一位置时的叠加磁动势波形称为常规磁动势波形,此种情况下感应电动势的计算是该种电机电磁性能分析与优化设计的前提。与正弦磁动势或理想叠加磁动势不同,常规磁动势下电机的感应电动势与激磁电流相位因磁路饱和不再相差/2,为此提出把感应电动势作为激磁电流流控电压源的处理方法。鉴于电机每半个极下气隙磁密波形不再相同的情况,提出基于电机1个极距区域的拓展分布磁路法计算气隙磁密,进而求出基波感应电动势与3次谐波感应电动势。非正弦供电十五相感应电机样机的感应电动势计算值与实测值相互吻合,说明了拓展分布磁路法计算感应电动势有效且具有较高的准确度。 | WANG Dong WU Xinzhen GUO Yunjun CHEN Junquan | 2013 | 中国电机工程学报2013，33，9： | 3 |
| 14 | Apparent diffusion coefficient evaluation for secondary changes in the cerebellum of rats after middle cerebral artery occlusion显示文摘Supratentorial cerebral infarction can cause functional inhibition of remote regions such as the cerebellum,which may be relevant to diaschisis.This phenomenon is often analyzed using positron emission tomography and single photon emission CT.However,these methods are expensive and radioactive.Thus,the present study quantified the changes of infarction core and remote regions after unilateral middle cerebral artery occlusion using apparent diffusion coefficient values.Diffusion-weighted imaging showed that the area of infarction core gradually increased to involve the cerebral cortex with increasing infarction time.Diffusion weighted imaging signals were initially increased and then stabilized by 24 hours.With increasing infarction time,the apparent diffusion coefficient value in the infarction core and remote bilateral cerebellum both gradually decreased,and then slightly increased 3–24 hours after infarction.Apparent diffusion coefficient values at remote regions(cerebellum)varied along with the change of supratentorial infarction core,suggesting that the phenomenon of diaschisis existed at the remote regions.Thus,apparent diffusion coefficient values and diffusion weighted imaging can be used to detect early diaschisis. | Yunjun Yang Lingyun Gao Jun Fu Jun Zhang Yuxin Li Bo Yin Weijian Chen Daoying Geng | 2013 | Neural Regeneration Research2013，8，31： | 3 |
| 15 | Numerical studies of reverse flows controlled by undulating leading edge显示文摘The improved delayed detached-eddy simulation(IDDES) method is used to simulate the reverse flows past an NACA0012 airfoil at medium(10°) and large(30°) angles of attack. The numerical results of the baseline configuration are compared with the available measurements. The effects of the undulating leading edge with four different amplitudes are compared and analyzed at angle of attack of 10°. Based on these analyses, the amplitude of A/C=0.04 yields the best performance. Compared with the uncontrolled case, the performances of the undulating leading edge are greatly improved with reducing of the aerodynamic fluctuations. Furthermore, the mechanisms of performance are explored by comparing the local flow structures near the undulations. | Biao Wang Jian Liu QiBing Li YunJun Yang ZhiXiang Xiao | 2019 | Science China(Physics,Mechanics & Astronomy)2019，62，7： | 2 |
| 16 | Non-spherical polymersomes driven by directional aromatic interactions显示文摘Polymersomes,nanoscopic polymer vesicles self-assembled from synthetic block copolymers,are ideal candidates for drug delivery and synthetic biology,due to their characteristic of high stability,chemical | Mingyan Luo Yunjun Luo Xiaoyu Li | 2018 | Science China Materials2018，61，3： | 2 |
| 17 | Significance of vulnerability assessment in establishment of Hainan provincal disaster medical system显示文摘Hainan is an island province in south China with a high frequency of unconventional emergencies due to its special geographic location and national military defense role.Given the limited transportation route from Hainan to the outside world,self-rescue is more important to Hainan Province than other provinces in China and it is therefore imperative to establish an independent, scientific as well as efficient provincal disaster medical system in Hainan.The regulatory role for vulnerability analysis/assessment has been demonstrated in establisment of disaster medical system in varoius countries and or regions.In this paper,we attempt to describe/propose how to adopt vulnerability assessment through mathematical modeling of major biophysical social vulnerability factors to establish an independent,scientific,effieicnt and comprehensive provincial disaster medical system in Hainan. | Min Li Chuanzhu Lu Wei Son Junhong Miao Yipeng Ding Longhe Li Leilei Zhang Nin Zhao Bijiang Hu Yunjun Zhang | 2011 | Asian Pacific Journal of Tropical Medicine2011，4，8： | 2 |
| 18 | Land use and land cover classification using Chinese GF-2 multispectral data in a region of the North China Plain显示文摘The newly launched GF-2 satellite is now the most advanced civil satellite in China to collect high spatial resolution remote sensing data.This study investigated the capability and strategy of GF?2 multispectral data for land use and land cover (LULC) classification in a region of the North China Plain.The pixel-based and object-based classifications using maximum likelihood (MLC) and support vector machine (SVM) classifiers were evaluated to determine the classification strategy that was suitable for GF?2 multispectral data.The validation results indicated that GF-2 multispectral data achieved satisfactory LULC classification performance,and object-based classification using the SVM classifier achieved the best classification accuracy with an overall classification accuracy of 94.33% and kappa coefficient of 0.911.Therefore,considering the LULC classification performance and data characteristics,GF-2 satellite data could serve as a valuable and reliable high-resolution data source for land surface monitoring.Future works should focus on improving LULC classification accuracy by exploring more classification features and exploring the potential applications of GF-2 data in related applications. | Kun JIA Jingcan LIU Yixuan TU Qiangzi LI Zhiwei SUN Xiangqin WEI Yunjun YAO Xiaotong ZHANG | 2019 | Frontiers of Earth Science2019，13，2： | 2 |
| 19 | Fabrication and thermal decomposition of glycidyl azide polymer modified nitrocellulose double base propellants显示文摘Glycidyl azide polymer(GAP) with the advantages of non-volatility and excellent thermal stability is a candidate as a replacement for nitroglycerine(NG) in a double base propellant. The GAP-NC double base propellants were formulated with GAP and nitrocellulose(NC) fibers. Tensile test and SEM characterization indicated that GAP-NC propellants had a homogeneous structure. Thermogravimetric analysis of GAP-NC propellants revealed that the onset decomposition temperature reached a high level ranging from 192.9 to 194.6 °C, which indicated that the substitution of NG with GAP contributed to the safe storage and process operations for double base propellant. The result analysis of decomposition products of GAP-NC propellants showed that the main gas decomposition products of the propellants were NO, NO_2, CO, CO_2, NH_3, CH_4, HCN, N_2, CH_2O and C_2H_4O. The thermal decomposition process of the specimens was proposed. | Benbo Zhao Tianfu Zhang Zhen Ge Yunjun Luo | 2016 | Science China Chemistry2016，59，4： | 2 |
| 20 | Real-time optimal coherent phantom track generation via the virtual motion camouflage approach 显示文摘 | Yunjun Xun Gareth Basset | 2010 | AIAA Guidance Navigation and Control Conference2010，2，5： | 1 |
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