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Search Results: 1 - 10 of 43120 matches for " Xian-Ru Guo "
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Bioassays on selection and feeding responses of Holotrichia oblita adults to different plant species

Wei-Zheng Li,Ying-Hua Yuan,Shi-Heng An,Guo-Hui Yuan,Mei-Hao Luo,Xian-Ru Guo,

生态学报 , 2009,
Abstract: Bioassays on selection and feeding responses of Holotrichia oblita adults to different plant species were conducted both in laboratory and under field conditions. The selection response bioassay showed that the adults were significantly attracted to Ricinus communis. In paired tests of the field cages, more than 60% adults were attracted to R. communis plants, while only 35.55%, 34.45%, 33.35%, and 26.65% were attracted to plants of Glycine max, Arachis hypogaea, Ipomoea batatas, and Gossypium hirsutum, respectively. In the laboratory, the selection response percentage of the adults to R. communis leaves reached up to 93% in the presence of other host plant leaves and still arrived at 70% in the absence of other host plant leaves. Feeding deterrence bioassay showed that the adults preferred to I. batatas leaves with 229.90 ± 4.25 mg leaf consumption and 41.30 ± 5.19 mg faeces excretion after 12 h, followed by the leaves of G. hirsutum and A. hypogaea. The adult did not prefer leaves of R. communi with only 7.10 ± 0.23 mg leaf consumption and corresponding 4.00 ± 0.84 mg fecal excretion. In summary, all experimental results suggested that the attraction of H. oblita adults to R. communi is not triggered for feeding.
Stereo matching searching method based on simulated annealing algorithm
基于模拟退火算法的立体匹配搜索方法

LIU Xian-ru,YANG Xin-rong,WU Chun-hong,WANG Shi-guo,
刘献如
,杨欣荣,伍春洪,王仕果

计算机应用 , 2006,
Abstract: The edge feature points were chosen as the primitives for matching. During the edge detection, the magnitude and direction of the edge gradient and the Laplace values were figured out as the three properties of the edge feature points. On the condition of some constraints for stereo matching, a global energy function and its corresponding state space were built. With the state space transferring, simulated annealing algorithm was used to minimize the energy function. When the energy function arrived the minimization, all the features in left image would find the corresponding features in the right images.
Effects of tobacco volatiles on ovipositing behaviors of two sibling Helicoverpa species and volatile chemical analysis
烟草挥发物对2近缘种夜蛾产卵行为的影响及其成分分析

XUE Wei-Wei,FU Xiao-Wei,LUO Mei-Hao,GUO Xian-Ru,YUAN Guo-Hui,
薛伟伟
,付晓伟,罗梅浩,郭线茹,原国辉

生态学报 , 2009,
Abstract: Oligophagous Helicoverpa assulta (Guenée) and polyphagous H. armigera (Hübner) are two sibling species, with tobacco as the shared host-plant. The effects of plant volatiles from one variety of Nicotiana tabacum and four varieties of N. rustica on electrophysiological and behavioral responses of these two insect species were investigated in the laboratory. The results indicated that virgin and mated females of H. assulta elicited stronger EAG and behavioral responses to four tested N. rustica varieties than to N. tabacum, while H. armigera was reverse in responses. Females of the two Helicoverpa species responded more actively in EAG and behavioral experiments to the volatiles of tested tobacco varieties than males, so there were significant sexual differences of the two sibling species. The results of gas chromatography-mass spectrum (GC-MS) showed that, in comparison with K326, variety "makhorka" contained higher amount of nicotine, more sorts of green leaf volatiles and less amount of aromatic compounds, suggesting that the difference in sorts and relative concentrations of tobacco volatiles may lead to the different ovipositing preferences of two sibling Helicoverpa species to N. tabacum and N. rustica tobacco plants.
Effects of host plants on the development, survival and fecundity of Adelphocoris suturalis Jakovlev (Hemiptera: Miridae)
不同寄主对中黑盲蝽(Adelphocoris suturalis)生长发育和繁殖的影响

GUO Xiao-Qi,FU Xiao-Wei,FENG Hong-Qiang,QIU Feng,GUO Xian-Ru,
郭小奇
,付晓伟,封洪强,邱峰,郭线茹

生态学报 , 2008,
Abstract: 实验在室内温度为(26±1)℃、相对湿度为75%±5%、自然光照的条件下,以四季豆、大豆、饭豇豆、苜蓿、转基因抗虫棉99B和非转基因棉石远321为食料,用生命表方法系统研究了不同寄主植物对中黑盲蝽实验种群生长发育、存活及繁殖的影响.结果表明中黑盲蝽(Adelphocoris suturalis)取食6种不同的寄主植物时,各虫态的发育历期、存活率、成虫寿命、产卵前期、产卵期、产卵量、5龄若虫体重等均有显著差异.用生命表参数综合评价表明,四季豆最适合中黑盲蝽的生长发育及繁殖,其次分别为苜蓿、转基因抗虫棉99B、非转基因棉石远321、饭豇豆、大豆,同时也表明转基因抗虫棉对中黑盲蝽无显著抗性.田间取食选择性试验表明,中黑盲蝽喜食饭豇豆和豇豆,可在棉田周围种植饭豇豆、豇豆作为诱集作物.
Electroantennogram responses of two sibling Helicoverpa species to tobacco plant volatile compounds at a lower concentration
两近缘种夜蛾对低浓度烟草挥发物的触角电位反应

FU Xiao-Wei,GUO Xian-Ru,LUO Mei-Hao,YUAN Guo-Hui,FAN Bao-Yin,FAN Yi-Lin,
付晓伟
,郭线茹,罗梅浩,原国辉,范保银,范一霖

生态学报 , 2009,
Abstract: 寡食性的烟夜蛾Helicoverpa assulta (Guenée)和广食性的棉铃虫Helicoverpa armigera (Hübner)是实夜蛾属的2近缘种昆虫,在它们的寄主植物中,只有烟草为其共同寄主,为明确它们对烟草挥发物嗅觉感受能力的差异,测定了这2种夜蛾的处女雌蛾、交配雌蛾及雄蛾对20种低浓度(1.0×10-5 mol · L-1)烟草挥发物的触角电位反应,并对其中6种化合物进行了剂量反应测定,结果表明,(1) 2种夜蛾对测试化合物均可产生EAG反应且反应趋势相似:对植物中普遍存在的绿叶气味、脂肪族和芳香族化合物的反应显著高于具有烟草"种"特异性的单萜类、倍半萜类和杂环化合物,表明2种夜蛾远距离定向时,对植物"种"的辨识能力均较差.(2) 2种夜蛾对脂肪族C6_化合物的EAG反应最强,碳链延长或缩短都会导致反应强度的降低.(3) 烟夜蛾对大多数化合物的EAG反应大于棉铃虫,表明在远距离寄主定向时其嗅觉感受器对寄主挥发物的感受能力强于棉铃虫.(4) 烟夜蛾交配雌蛾对β-水芹烯和桧烯的EAG反应高于其处女雌蛾和雄蛾,除此之外2种夜蛾的EAG反应未见显著的性别差异,推测β-水芹烯和桧烯可能是烟夜蛾在烟草上产卵的"信号"物质.(5) 剂量反应曲线表明,在测试的浓度范围内,2种夜蛾对6种类型化合物的EAG反应强度与其浓度呈正相关,且均未达到饱和.由此可知,与棉铃虫相比,烟夜蛾嗅觉神经系统在其寄主定向行为中所起的作用更重要、也更专化.
Effects of two tobacco species on experimental and natural population dynamics of Helicoverpa assulta Guenée
两种烟草对烟夜蛾实验种群和自然种群增长的影响

FU Xiao-Wei,GUO Xian-Ru,LUO Mei-Hao,YUAN Guo-Hui,HU Rui,YANG Xin-Ying,LI Liang,
付晓伟
,郭线茹,罗梅浩,原国辉,胡锐,杨新影,李亮

生态学报 , 2009,
Abstract: 烟夜蛾对黄花烟草的产卵趋性显著高于普通烟草,为明确亲代成虫的产卵选择行为对其后代种群增长的影响,分别在室内和自然条件下,应用生命表技术测定了两种烟草对烟夜蛾的生长发育和存活、食物的转化和利用以及种群增长的影响.结果表明:(1) 室内(26±1)℃、(75±5)% R.H和16L:8D光周期条件下,与普通烟草相比,黄花烟草上幼虫的发育历期显著延长,1~3龄各期幼虫的存活率及雌蛾产卵量显著降低,种群净增殖率(R0=16.1086)和内禀增长率(rm=0.0848)减小.(2) 6龄幼虫对两种烟草的相对取食量(RCR)和近似消化率(AD)无显著差异,但是对黄花烟草的利用率(ECI)、转化率(ECD)及其相对生长率(RGR)显著下降.(3) 第二代烟夜蛾在普通烟田的种群数量呈上升趋势(I=1.0325>1),而在黄花烟田呈下降趋势(I=0.6577<1),第三代烟夜蛾种群在两种烟田均呈下降趋势,但普通烟田的种群增长(I=0.4571)大于黄花烟田(I=0 3592).这些结果表明,黄花烟草较不适合烟夜蛾的繁殖和种群增长,其寄主适合性不如普通烟草.
Repellent effect of non-host vegetables and their extracts on Pieris rapae L.
非寄主蔬菜及其提取物对菜粉蝶的驱避作用

WU Li-Min,LU Wen-Yan,YUAN Guo-Hui,XU Yan-Ling,GUO Xian-Ru,LUO Mei-Hao,
吴利民
,吕文彦,原国辉,徐艳聆,郭线茹,罗梅浩

中国生态农业学报 , 2010,
Abstract: To evaluate the control effects of non-host vegetables on imported cabbage butterfly Pieris rapae, bioassays were conducted to investigate the repellent effects of 6 non-host vegetables such as tomato (Lycopersicon esculentum), fennel (Foeniculum vulgare), catnip (Nepeta cataria), lettuce (Lactuca sativa), coriander (Coriandrum sativum) and towel gourd (Luffa cylindrical) on the butterfly in laboratory and field experiments. Indoor bioassay results show that selection response percentage of adult butterfly to cabbage reduces after treated with non-host vegetable extracts. The selection response percentages of mated female butterfly to cabbages treated with catnip, fennel, tomato and lettuce extracts are particularly low, only 3.67%, 4.30%, 5.27% and 8.26% respectively. Egg numbers laid by adult butterflies in cabbage seedlings treated with non-host vegetable extracts significantly reduce as well. Repellent activities of tomato, fennel and catnip extracts are strongest. After one day of treatment, the percentages of no-choice oviposition repellent are 91.04%, 75.54% and 71.67%, and those of choice oviposition repellent are 94.64%, 79.66% and 78.96% respectively. Field test results show that the amount of butterfly eggs in per cabbage plant could drop by 68.80%, 62.62% and 55.09% respectively in intercropping filed of cabbage with tomato, fennel and catnip. Effective repellent distances of the three non-host vegetables are 4 m, 2 m and 2 m respectively. Therefore, imported cabbage butterfly could be repelled by intercropping non-host vegetables or spraying not-host vegetable extracts in the cabbage fields.
The Klein-Gordon equation in Machian model
Bin Liu,Yun-Chuan Dai,Xian-Ru Hu,Jian-Bo Deng
Physics , 2010, DOI: 10.1007/s10773-011-0862-3
Abstract: The non-local Machian model is regarded as an alternative theory of gravitation which states that all particles in the Universe as a 'gravitationally entangled' statistical ensemble. It is shown that the Klein-Gordon equation can be derived within this Machian model of the universe. The crucial point of the derivation is the activity of the Machian energy background field which causing a fluctuation about the average momentum of a particle, the non-locality problem in quantum theory is addressed in this framework.
Emergence of space and the general dynamic equation of Friedmann-Robertson-Walker universe
Wen-Yuan Ai,Xian-Ru Hu,Hua Chen,Jian-Bo Deng
Physics , 2013, DOI: 10.1103/PhysRevD.88.084019
Abstract: A novel idea that the cosmic acceleration can be understood from the perspective that spacetime dynamics is an emergent phenomena was proposed by T. Padmanabhan. The Friedmann equations of FRW universe can be derived from different gravity theories with different modifications of Padmanabhan's proposal. In this paper, a unified formula is proposed, in which those modifications can be treated as special cases when the formula is applied to different universe radii. Furthermore, the dynamic equations of FRW universe in the $ f(R) $ theory and deformed Ho{\v{r}}ava-Lifshitz theory are investigated. The results show the validity of our proposed formula.
A first-principle study on some quanternary Heusler alloys with 4d and 3d transition metal elements
Qiang Gao,Huan-Huan Xie,Lei Li,Gang Lei,Ke Wang,Jian-Bo Deng,Xian-Ru Hu
Physics , 2015,
Abstract: In this letter, we investigate the magnetic properties, electronic structures, Slater-Pauling behaviours of some quanternary Heusler alloys with 4d and 3d transition metal elements. The energy levels of the minority-spin electronic band structures for all our calculated alloys are discussed. We have summaried 21 quanternary Heusler alloys. Our calculations indicate that the half metals ZrCoCrSi, ZrCoCrIn, ZrCoFeSi, ZrFeVAl, ZrFeVGa and NbFeCrAl have large spin-flip gaps.
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