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Search Results: 1 - 10 of 76475 matches for " GUO Zi-wu "
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Advance in the mechanism of biochemistry and molecular biology in response to cold stress of plant
植物低温胁迫响应的生化与分子生物学机制研究进展

GUO Zi-Wu,LI Xiao-Li,GAO Dong-Sheng,DUAN Cheng-Guo,
郭子武
,李宪利,高东升,段成国

中国生态农业学报 , 2004,
Abstract: The signs of low temperature activate the expression of some freezing tolerant genes of plant and the contents of specific proteins and osmotic adjustment substances are raised,all of which elevate the antioxidant capacity and the osmotic adjustment capacity and protect the plant cells,thus the expression of some freezing tolerant genes is the determinant of the antifreeze capacity,so it is critical for breeding antifreeze traits that enhances the level of the expression of freezing tolerant genes. Finally,the view of this domain in future is presented.
Comparative Analysis of Culm Form and Timber Characteristics in Three Dendrocalamus Species
牡竹属三竹种的秆形质量与材性比较

GUO Zi-wu,CHEN Shuang-lin,YANG Qing-ping,LI Ying-chun,ZOU Yue-guo,
郭子武
,陈双林,杨清平,李迎春,邹跃国

热带亚热带植物学报 , 2011,
Abstract: Culm form and timber properties of Dendrocalamus mino, Dendrocalamus asper and Dendrocalamus brandisii was comparative analyzed. The results indicated that there was significant difference on height under branch and very significant difference on relative total height amony three bamboo species. Diameter at breast height(DBH), total height, height under branch, taper and wall thickness ratio of D. brandisii was the biggest one of three bamboo species, and relative height under branch was smallest of them. With the increase of bamboo age, water content of bamboo culm decreased significantly, and ordered by D. minor> D. brandisii > D. asper. The relative volume of D. brandisii, D. minor, D. asper was 1771.35cm3.cm-1, 1166.66 cm3.cm-1,659.78 cm3.cm-1 respectively, and very significant difference was found among bamboo species. With the increase of bamboo age, timber density increased significantly, the highest was found in D. minor, middle in D. brandisii and lowest in D. asper. Timber density of 3a D. minor, D. brandisii and D. asper was 0.914 g.cm-3, 0.812g.cm-3, 0.749 g.cm-3 respectively. All results was summarized that D. minor with graceful culm form and elegant weeping top-branch was suitable to be used for garden and urban landscaping or shooting, otherwise D. brandisii with best culm form, biggest culm biomass and timber volume was more suitable used for timber and shoot production.
Comparative Analysis of Culm Form and Timber Characteristics in Three Dendrocalamus Species
牡竹属三竹种的秆形质量与材性比较

GUO Zi-wu,CHEN Shuang-lin,YANG Qing-ping,LI Ying-chun,ZOU Yue-guo,
郭子武
,陈双林,杨清平,李迎春,邹跃国

热带亚热带植物学报 , 2011,
Abstract: The culm form and timber properties of three Dendrocalamus species, such as D. mino var. amoenus, D. asper and D. brandisii, were studied. The results showed that there were significant difference in height under branch and very significant difference on relative total height among three bamboo species. The diameter at breast height (DBH), total height, height under branch, taper and wall thickness ratio of D. brandisii were the biggest, while the relative height under branch was the smallest. With the increment of bamboo age, water content of bamboo culm decreased significantly with order as D. minor var. amoenus > D. brandisii >D. asper. The difference in relative volume of D. brandisii, D. minor var. amoenus, D. asper was very significant with 1771.35 cm3 cm-1, 1166.66 cm3 cm-1, and 659.78 cm3 cm-1, respectively. With the increment of bamboo age, timber density increased significantly, D. minor was the highest, and D. asper was the lowest. Timber density of 3-year-old D. minor var. amoenus, D. brandisii and D. asper was 0.914 g cm-3, 0.812 g cm-3, and 0.749 g cm-3, respectively. It suggested that D. minor var. amoenus could accomplish as ornament and shoot use bamboo, otherwise D. brandisii and D. asper as bamboo shoot and timber.
Effects of Slope on Population Growth and Biomass Allocation of Polygonatum cyrtonema in Phyllostachys edulis Forest
陡坡地毛竹林多花黄精种群生长和生物量分配的坡位效应

FAN Yan-rong,CHEN Shuang-lin,YANG Qing-ping,LI Ying-chun,GUO Zi-wu,
樊艳荣
,陈双林,杨清平,李迎春,郭子武

热带亚热带植物学报 , 2012,
Abstract: In order to establish a theoretical basis for compound management of Polygonatum cyrtonema in Phyllostachys edulis forest, we studied the population growth conditions, biomass accumulation and allocation rules of P. cyrtonema at one side upper , middle, and lower slopes in extensive managed and structure consistent Ph. edulis forest. The results showed that population density, leaf chlorophyll values, biomass accumulation of leaves and roots, and biomass distribution pattern of leaves, roots and underground tubers of P. cyrtonema had no significant differences at different slope positions in Ph. edulis forest. Plant height had no significant differences between lower slope and upper slope, while the two slopes were significantly higher than middle slope. Diameter had no significant differences between lower slope and middle slope, while the two slopes were significantly lower than upper slope. Ground stems biomass had no significant differences between middle slope and upper slope, while the two slopes were significantly lower than lower slope. Underground tubers biomass, total biomass accumulation at lower slope were significantly higher than the ones at middle slope, while had no significant differences between the two slopes and upper slope. Biomass distribution pattern of ground stems at lower slope were significantly higher than the one at upper slope, while had no significant differences between the two slopes and middle slope. The biomass distribution patterns of P. cyrtonema were that the underground tubers biomass allocated more than 70% of the total, significantly greater than the sum of roots, leaves, and stem grounds whose biomass allocations were more uniform in Ph. edulis forest at different slope positions. There was obvious slope effect on population growth, biomass accumulation and allocation of Polygonatum cyrtonema in Phyllostachys edulis forest. Under the level of stand structure and operating conditions in test Ph. edulis forest, lower slope was considered to be chosen to carry out compound management of P. cyrtonema in Ph. edulis forest.
A study on aerodynamics and mechanisms of elementary morphing models for flapping wing in bat forward flight
Guan Zi-Wu,Yu Yong-Liang
Physics , 2014, DOI: 10.1007/s10483-015-1931-7
Abstract: The large active wing deformation is a significant way to generate high aerodynamic forces required in bat flapping flight. Besides the twisting, the elementary morphing models of a bat wing are proposed, such as wing-bending in the spanwise direction, wing-cambering in the chordwise direction, and wing area-changing. A plate of aspect ratio 3 is used to model a bat wing and a three dimensional unsteady panel method is applied to predict the aerodynamic forces. It is found that the cambering model has a great positive influence on the lift, followed by area-changing model and then the bending model. The further study indicates that the vortex control is a main mechanism to produce high aerodynamic forces, and the mechanisms for the aerodynamic force enhancement are the asymmetry of the cambered wing and the amplifier effects of wing area-changing and wing bending. The lift and thrust are mainly generated during the downstroke and almost negligible forces during the upstroke by the integrated morphing model-wing.
Effects of Atmospheric Ozone Stress on Photosynthetic Physio- response of Three Dwarf Bamboos
3种地被竹对大气臭氧胁迫的光合生理响应

LI Ying,CHEN Shuang-lin,XIE Shuang-xi,LI Ying-chun,ZHUANG Ming-hao,GUO Zi-wu,YANG Qing-ping,
李应
,陈双林,谢双喜,李迎春,庄明浩,郭子武,杨清平

热带亚热带植物学报 , 2012,
Abstract: The effect of ozone stress on the photosynthetic physiological of three dwarf bamboos, such as Indocalamus decorus, Pleioblastus kongosanensis f.aureostriatus and Sasa glabra f. albostriata were studied. Three levels of ozone concentrations, including basic concentration of environment, 100 nL L-1and 150 nL L-1, were simulated by using an open-top chamber (OTCs) technique. The results showed that the chlorophyll content in Indocalamus decorus leaves increased at first and then decreased with the ozone concentration increased, while that in Pleioblastus kongosanensis f.aureostriatus showed opposite change, and that in Sasa glabra f. albostriata declined. The changes in carotenoid content of three dwarf bamboos leaves were not obvious. The daily net photosynthetic rate (Pn) of Indocalamus decorus increased at first and then decreased, while that of Pleioblastus kongosanensis f.aureostriatus increased slightly at first and then decreased rapidly, and that of Sasa glabra f. albostriata decreased. The daily changes of photosynthetic parameters in three dwarf bamboos were obvious with ozone concentration increment. Under 100 nL L-1 ozone, the photosynthesis of Indocalamus decorus did not inhibit, but those in Pleioblastus kongosanensis f. aureostriatus and Sasa glabra f. albostriata inhibited obviously, while 150 nL L-1 ozone caused serious damage to their photosynthetic physiological metabolism. In general, Indocalamus decorus showed higher tolerance to ozone than another bamboo.
Parabolic linear bound potential quantum dot qubit and its optical phonon effect
抛物线性限制势量子点量子比特及其光学声子效应

Wang Zi-Wu,Xiao Jing-Lin,
王子武
,肖景林

物理学报 , 2007,
Abstract: On the condition of electric-LO phonon strong coupling in parabolic quantum dot, we obtain the eigenenergy and the eigenfuctions of the ground state and the first excited state by using variational method of Peakar type. This system in quantum dot may be employed as a two-level quantum system-qubit. When the electron is in the superposition state of the ground state and the first excited state, we obtain the time evolution of the electron density. It is shown that the period of oscillation decreases with the strength of coupling increasing when the confined length is constant. And the period of oscillation increases with the confined length increasing when the strength coupling is constant.
Electron tunneling effects on radiative recombination in modulation n-doped ZnSe/BeTe type-II quantum wells

Ji Zi-Wu,Zheng Yu-Jun,Xu Xian-Gang,

中国物理 B , 2010,
Abstract: We have studied the cyclotron-resonance absorption and photoluminescence properties of the modulation n-doped ZnSe/BeTe/ZnSe type-II quantum wells. It is shown that only the doped sample shows electron cyclotron-resonance absorption. Also, the undoped sample shows two distinctive peaks in the spatially indirect photoluminescence spectra, and the doped one shows only one peak. The results reveal that the high concentration electrons accumulated in ZnSe quantum well layers from n-doped layers can tunnel through BeTe barrier from one well layer to the other. The electron concentration difference between these two well layers originating from the tunneling results in a new additional electric field, and can cancel out a built-in electric field as observed in the undoped structures.
Hybrid quantum differential evolutionary algorithm and its applications
混合量子差分进化算法及应用

REN Zi-wu,XIONG Rong,CHU Jian,
任子武
,熊蓉,褚健

控制理论与应用 , 2011,
Abstract: Standard quantum-inspired evolutionary algorithm uses quantum gate to update the state of Q-bits, which deteriorates its optimization performance. A novel hybrid quantum-inspired evolutionary algorithm(HQDE) based on a hybrid of quantum differential evolutionary algorithm(QDE) and quantum harmony search(QHS) is presented. The HQDE adopts real-valued quantum angle to express the Q-bits of chromosome, and the new quantum population is produced through two approaches, i.e. QDE strategy and QHS strategy. Therein QDE strategy uses differential evolution to update the state of Q-bits, and QHS strategy employs harmony search to update the state of Q-bits. In addition, to avoid the disadvantage of easily getting in the local optimum, the HQDE performs quantum non-gate operation to transform the selected Q-bits of the current worst chromosome with a specified probability. Theoretical analysis proves that HQDE converges to the global optimum. The experimental results in solving 0-1 knapsack problem and 14 cities traveling salesman problem(TSP) demonstrate its effectiveness.
Control and synchronization of chaotic systems based on a hybrid electromagnetism-like mechanism algorithm
基于混合类电磁机制算法的混沌系统控制与同步

REN Zi-wu,XIONG Rong,CHU Jian,
任子武
,熊蓉,褚健

控制理论与应用 , 2011,
Abstract: By using optimization method, we can design the control law for controlling and synchronizing chaotic systems to operate onto the desired directional orbits of chaotic dynamical systems. The electromagnetism-like algorithm(EM) is a meta-heuristic optimization method which simulates the attraction-repulsion behavior of electrically charged particles in the process of approaching the desired points. To the best of our knowledge, there is no research work on EM for control and synchronization of chaotic systems. In this paper, an effective hybrid electromagnetism-like algorithm(HEM) is presented to solve these optimization problems. The HEM combines the revised electromagnetism-like algorithm(REM) and the differential evolutionary algorithm(DE) to strive for a well balance between the global exploration and the local exploitation. The experimental results of benchmark functions show that this hybrid configuration greatly improves both the global optimization performance and the reliability performance. The proposed HEM has been applied to guide the orbits of discrete chaotic systems towards the desired target region within a short period of time, under a small bounded perturbation. Moreover, the synchronization of chaotic systems can be considered a problem of online guiding of orbits, solved by HEM algorithm. Numerical simulation results on the Henon mapping demonstrate the effectiveness of this hybrid.
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