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| 1 | 3D Geometry-Based UAV-MIMO Channel Modeling and Simulation显示文摘A more general narrowband regular-shaped geometry-based statistical model(RS-GBSM) combined with the line of sight(LoS) and single bounce(SB) rays for unmanned aerial vehicle(UAV) multiple-input multiple-output(MIMO) channel is proposed in this paper. The channel characteristics, including space-time correlation function(STCF), Doppler power spectral density(DPSD), level crossing rate(LCR) and average fade duration(AFD), are derived based on the single sphere reference model for a non-isotropic environment. The corresponding sum-of-sinusoids(SoS) simulation models including both the deterministic model and statistical model with finite scatterers are also proposed for practicable implementation. The simulation results illustrate that the simulation models well reproduce the channel characteristics of the single sphere reference model with sufficient simulation scatterers. And the statistical model has a better approximation of the reference model in comparison with the deterministic one when the simulation trials of the stochastic model are sufficient. The effects of the parameters such as flight height, moving direction and Rice factor on the characteristics are also studied. | Rubing Jia Yiran Li Xiang Cheng Bo Ai | 2018 | China Communications2018，15，12： | 11 |
| 2 | Neuroprotective effect of epigallocatechin-3-gallate on hemisection-induced spinal cord injury in rats显示文摘Epigallocatechin-3-gallate (EGCG),a naturally occurring compound in green tea,has been widely used as an antioxidant agent.In the present study,model rats with acute spinal cord injury were intraperitoneally injected with 25,50,and 100 mg/kg EGCG,and spinal cord ultrastructure,oxidative stress reaction,inflammatory factors,and apoptosis-associated gene expression were observed.Results showed that EGCG attenuated neuronal and axonal injury 24 hours post injury.It also decreased serum interleukin-1β,tumor necrosis factor-α,and intercellular adhesion molecule-1 release,and decreased apoptosis-associated gene expression.Furthermore,it increased the level of the superoxide anion (O2-),superoxide dismutase,and B-cell lymphoma/leukemia-2,and reduced malondialdehyde levels.Furthermore,it reduced the expression of the pro-apoptotic protein Bax.Noticeably,EGCG at the 100 mg/kg dosage exhibited similar effects as methylprednisolone sodium succinate,which has been frequently used for clinical acute spinal cord injury.The results demonstrated that EGCG can significantly inhibit inflammation,suppress oxidation,and reduce apoptosis in acute spinal cord injury. | Fengjun Deng Rubing Li Yingbao Yang Dan Zhou Qian Wang Jiangping Xu | 2011 | Neural Regeneration Research2011，6，6： | 4 |
| 3 | Strong solutions of SDE driven by countably many Brownian motions显示文摘 | ZONG Fengxi LI Rubing | 2010 | Jour-nal of Yunnan University o{ Nationalities2010，19，5： | 1 |
| 4 | Properties of countably many Brownian motions显示文摘 | ZONG Fengxi LI Rubing | 2009 | Journal of Shandong Nor real University2009，24，2： | 1 |
| 5 | Determination of manganese content in cottonseed meal using near-infrared spectrometry and multivariate calibration显示文摘Background:Manga nese(Mn)is an essential microelement in cotton seeds,which is usually determined by the techniques relied on hazardous reagents and complex pretreatment procedures.Therefore a rapid,low-cost,and reagent-free analytical way is demanded to substitute the traditional analytical method.Results:The Mn content in cottonseed meal was investigated by near-infrared spectroscopy(NIRS)and chemometrics techniques.Standard normal variate(SNV)combined with first derivatives(FD)was the optimal spectra pre-treatment method.Monte Carlo uninformative variable elimination(MCUVE)and successive projections algorithm method(SPA)were employed to extract the informative variables from the full NIR spectra.The lin ear and non linear calibration models for cott on seed Mn content were developed.Finally,the optimal model for cottonseed Mn content was obtained by MCUVE-SPA-LSSVM,with root mean squares error of prediction(RMSEP)of 1.994 6,coefficient of determination(R^2)of 0.949 3,and the residual predictive deviation(RPD)of 4.370 5,respectively.Conclusions:The MCUVE-SPA-LSSVM model is accuracy enough to measure the Mn content in cottonseed meal,which can be used as an alter native way to substitute for traditional analytical method. | YU En ZHAO Rubing CAI Yunfei HUANG Jieqiong LI Cheng LI Cong MEI Lei BAO Lisheng CHEN Jinhong ZHU Shuijin | 2019 | Journal of Cotton Research2019，2，2： | 0 |
| 6 | Antiviral spirooliganones C and D with a unique spiro[bicyclo[2.2.2]octane-2,2′-bicyclo[3.1.0]hexane]carbon skeleton from the roots of Illicium oligandrum显示文摘Two unprecedented polycyclic spirooliganones C and D(1 and 2)with a novel spiro[bicyclo[2.2.2]octane-2,2′-bicyclo[3.1.0]hexane]carbon skeleton,one known dimeric prenylated C_(6)single bondC_(3)compound(3),and a pair of new enantiomeric prenylated C_(6)single bondC_(3)compounds(+)-5 and(−)-5 together with their direct precursors(+)-4 and(−)-4 were isolated from the roots of Illicium oligandrum.Their structures and absolute configurations were elucidated by spectroscopic analysis,single crystal X-ray diffraction data,and electronic circular dichroism calculations.A possible biosynthetic pathway for compounds 1 and 2 involving the Diels-Alder reaction between(−)-sabinene and cyclic prenylated tetrahydropyrano-type C_(6)single bondC_(3)compounds was proposed.The characteristic prenylated C_(6)single bondC_(3)compounds(+)-4 and(−)-4 were separated on a chiral stationary phase and their absolute configurations were determined by calculated ECD for the first time.In the antiviral bioassays,compounds 1 and(+)-5 exhibited significant inhibitory activity against CVB3 with IC_(50)values of 11.11μmol/L and 1.11μmol/L,respectively.Compounds 1 and 2 also showed moderate inhibition against influenza A(H1N1)virus. | Shuanggang Ma Rubing Wang Rongmei Gao Xiaojing Wang Yunbao Liu Yong Li Li Li Yuhuan Li Jing Qu Shishan Yu | 2022 | Chinese Chemical Letters2022，33，9： | 0 |
| 7 | Do you respond sincerely? How sellers'responses to online reviews affect customer relationship and repurchase intention显示文摘For many online businesses,online reviews are crucially important to managing reputation,word-of-mouth sales,and,ultimately,their survival.Hence,more and more on line business owners are posting public responses to both positive and negative reviews.But do these responses change anything?And,if so,which types of responses are the most effective for strengthening customer relationship and increasing the chances of repeat business?With two surveys and a series of partial least squares-structural equation modeling(PLS-SEM)analyses,we tested three releva nt hypotheses to an swer these questions.The results show that when busi ness replies to online reviews with promotional information,consumers perceive the seller to be self-interested,and both relati on ship quality and repurchase intenti on decrease.However,sincere responses that do not contain promotional information,such as gratitude and apology,are highly correlated to positive relationship quality and the likelihood of future repeat business.These findings enrich the academic literature on on line reviews,and the recommendations stemming from our results should be of interest to any business that relies on their online reputation for survival. | Xiaofei Li Baolong Ma Rubing Bai | 2020 | Frontiers of Business Research in China2020，14，3： | 0 |
| 8 | Receiver function imaging of dense seismic array and deep dynamic mechanism beneath the eastern South China显示文摘The Mesozoic tectonic framework of the eastern South China is mainly controlled by subduction,turning toward,and rollback of the Pacific Plate.Recent studies of receiver function imaging and ambient noise tomography have revealed the“Yshaped”thinnest crustal belt in the eastern South China under the overall extension of the lithosphere.However,the deep dynamic environment and formation mechanisms of the thin crustal belt remain debatable.Here we obtained high-resolution images of the crustal thickness and Poisson’s ratio in the eastern South China Block applying the recently proposed H-κ-c receiver function method,using data recorded by 305 dense portable broadband stations and 219 permanent stations surrounding.Additionally,we discussed the deep dynamic formation mechanism of the“Y-shaped”thinnest crustal belt coupled with two common conversion point stacked images at key locations.Results show that the average crustal thickness of the study area is 33 km(thin crust)and the average Poisson’s ratio is 0.24(low ratio).The overall crustal thinning toward the continental margin is likely because eastern South China was in a back-arc extension environment,which was induced by the rollback of the subducted plate in the Early Cretaceous.The crustal thickness of the“Y-shaped”thinnest crustal belt is<30 km,which is 3-5 km thinner than that outside the zone.The eastern branch is distributed along the trajectory of Nanchang-Ji’an-Ganzhou-Shaoguan-Guangzhou,and the western branch is around the Jianghan-Xiangzhong Basin,both of which intersect in Nanling.The eastern branch of the thin crustal zone indicates the potential location of the Pacific subduction slab breakoff,and the formation mechanism may be related to the interaction of deep-shallow processes,including the upwelling of mantle heat flow through the slab window and transtensional pre-existing faults.We developed a dynamic model that combines subduction-breakoff-rollback processes of the Paleo-Pacific Plate and accompanying deep fluid upwelling to explain the regional extension of the South China lithosphere,the formation mechanism of the thinnest crustal belt,and the distribution of granitic plutons. | Rubing HAN Dinghui YANG Qiusheng LI Rong HUANG Hongshuang ZHANG Jiangtao LI Hao CHEN Zhuo YE Wei FU | 2023 | Science China Earth Sciences2023，66，6： | 0 |
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