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| 1 | Ecological vulnerability analysis of Beidagang National Park,China显示文摘Ecological vulnerability analysis (EVA) is vital for ecological protection,restoration,and management of wetland-type national parks.In this study,we assessed the ecological vulnerability of Beidagang National Park based upon remote sensing (RS) and geographic information system (GIS) technologies.To quantify the ecological vulnerability,10 indices were collected by the 'exposuresensitivity- adaptive capacity' model and spatial principal component analysis (SPCA) was then applied to calculate the ecological vulnerability degree (EVD).Based on the numerical values,EVD of the study area was classified into five levels: moderate,light,medium,strong,and extreme.Results showed that the average EVD value was approximately 0.39,indicating overall good ecological vulnerability in Beidagang National Park.To be specific,80.42% of the whole area was assigned to a moderate level of EVD with the highest being the tourism developed areas and the lowest being the reservoirs and offshore areas.Ecological vulnerability of the region was determined to be affected by the natural environment and anthropogenic disturbance jointly.The primary factors included tourism disturbance,traffic interference,exotic species invasion,land use/land cover,and soil salinization.We expected to provide some insights of the sustainable development of Beidagang National Park and would like to extend the results to other wetland-type national parks in the future. | Xue YU Yue LI Min XI Fanlong KONG Mingyue PANG Zhengda YU | 2019 | Frontiers of Earth Science2019，13，2： | 10 |
| 2 | Bessel–Gauss photon beams with fractional order vortex propagation in weak non-Kolmogorov turbulence显示文摘We model the effects of weak fluctuations on the probability densities and normalized powers of vortex models for the Bessel–Gauss photon beam with fractional topological charge in the paraxial non-Kolmogorov turbulence channel. We find that probability density of signal vortex models is a function of deviation from the center of the photon beam, and the farther away from the beam center it is, the smaller the probability density is. For fractional topological charge, the average probability densities of signal/crosstalk vortex modes oscillate along the beam radius except the half-integer order. As the beam waist of the photon source grows, the average probability density of signal and crosstalk vortex modes grow together. Moreover, the peak of the average probability density of crosstalk vortex modes shifts outward from the beam center as the beam waist gets larger. The results also show that the smaller index of non-Kolmogorov turbulence and the smaller generalized refractive-index structure parameter may lead to the higher average probability densities of signal vortex modes and lower average probability densities of crosstalk vortex modes. Lower-coherence radius or beam waist can give rise to less reduction of the normalized powers of the signal vortex modes, which is opposite to the normalized powers of crosstalk vortex modes. | Jie Gao Yu Zhu Donglin Wang Yixin Zhang Zhengda Hu Mingjian Cheng | 2016 | Photonics Research2016，4，2： | 2 |
| 3 | Effect of Rapeseed Straw on Growth and Slaughter Performance of Sichuan White Goose显示文摘[Objective] The paper was to study the effects of rapeseed straw on growth and slaughter performance of Sichuan white goose.[Method]Totally 4003-day-old Sichuan white geese were randomly divided into four groups; geese in control group were fed with the fundamental diet; geese in group 1,group 2 and group 3 were fed with the fundamental diet containing 5%,10% and 10% rapeseed straw instead of equal amount of wheat bran,respectively.The body weight and slaughter performance of Sichuan white geese in control group,group 1 and group 2 were determined at 10 weeks of age,while those in group 3 were determined at14 weeks of age.[Result] There was no significant difference in gross weight,slaughter weight,eviscerated weight with giblet,head weight,sole weight,wing weight,neck weight,muscular stomach weight and intestine indexes of 10-week-old white geese between group 1 and control group,and between group 2 and control group( P > 0.05); the live weight slightly decreased.The growth and slaughter performance of 14-week-old Sichuan white geese were significantly higher than that of 10-week-old geese( P < 0.05),with better meat and flavor,but relatively low average daily gain( P < 0.05); there was no significant impact on muscular stomach p H and intestinal p H( P > 0.05).[Conclusion]Substituting partial wheat bran with rapeseed straw can satisfy the diet requirement of Sichuan white geese,but has no significant impact on its growth and slaughter performance( P > 0.05). | Yang Ting Lei Zhengda Zhang Yishu Yu Zhiqiang Wang Dayi | 2017 | Animal Husbandry and Feed Science2017，9，6： | 1 |
| 4 | CBX4 deletion promotes tumorigenesis under Kras^(G12D) background by inducing genomic instability显示文摘Chromobox protein homolog 4(CBX4)is a component of the Polycomb group(PcG)multiprotein Polycomb repressive complexes 1(PRC1),which is participated in several processes including growth,senescence,immunity,and tissue repair.CBX4 has been shown to have diverse,even opposite functions in different types of tissue and malignancy in previous studies. | Fangzhen Chen Wulei Hou Xiangtian Yu Jing Wu Zhengda Li Jietian Xu Zimu Deng Gaobin Chen Bo Liu Xiaoxing Yin Wei Yu Lei Zhang Guoliang Xu Hongbin Ji Chunmin Liang Zuoyun Wang | 2023 | Signal Transduction and Targeted Therapy2023，8，10： | 0 |
| 5 | Energy-Efficient Data Collection over Underwater MI-Assisted Acoustic Cooperative MIMO WSNs显示文摘Underwater magnetic induction(MI)-assisted acoustic cooperative multiple-input-multipleoutput(MIMO) has been recently proposed as a promising technique for underwater wireless sensor networks(UWSNs).For the more,the energy utilization of energy-constrained sensor nodes is one of the key issues in UWSNs,and it relates to the network lifetime.In this paper,we present an energy-efficient data collection for underwater MI-assisted acoustic cooperative MIMO wireless sensor networks(WSNs),including the formation of cooperative MIMO and relay link establishment.Firstly,the cooperative MIMO is formed by considering its expected transmission range and the energy balance of nodes with it.Particularly,from the perspective of the node’s energy consumption,the expected cooperative MIMO size and the selection of master node(MN) are proposed.Sequentially,to improve the coverage of the networks and prolong the network lifetime,relay links are established by relay selection algorithm that using matching theory.Finally,the simulation results show that the proposed data collection improves its efficiency,reduces the energy consumption of the master node,improves the networks’ coverage,and extends the network lifetime. | Qingyan Ren Yanjing Sun Song Li Bin Wang Zhengda Yu | 2023 | China Communications2023，20，11： | 0 |
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