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Numerical investigation on tsunami wave mitigation on forest sloping beach

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Acta Oceanologica Sinica 2020年第1期39卷 130-140页

作者： Mingliang Zhang Yongpeng Ji yini Wang Hongxing Zhang Tianping Xu School of Ocean Science and Environment Dalian Ocean University

An explicit one-dimensional model based on the shallow water equations(SWEs) was established in this work to simulate tsunami wave propagation on a vegetated beach. This model adopted the finite-volume method(FVM)for maintaining the mass balance of these equations. The resistance force caused by vegetation was taken into account as a source term in the momentum equation. The Harten–Lax–van Leer(HLL) approximate Riemann solver was applied to evaluate the interface fluxes for tracing the wet/dry transition boundary. This proposed model was used to simulate solitary wave run-up and long-periodic wave propagation on a sloping beach. The calibration process suitably compared the calculated results with the measured data. The tsunami waves were also simulated to discuss the water depth, tsunami force, as well as the current speed in absence of and in presence of forest domain. The results indicated that forest growth at the beach reduced wave energy loss caused by tsunamis. A series of sensitivity analyses were conducted with respect to variable parameters(such as vegetation densities, wave heights, wave periods, bed resistance, and beach slopes) to identify important influences on mitigating tsunami damage on coastal forest beach.

关键词： shallow water equations HLL scheme tsunami waves coastal vegetation wave propagation

Solar radiation effects on leaf nitrogen and phosphorus stoichiometry of Chinese fir across subtropical China

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Forest Ecosystems 2021年第4期8卷 831-840页

作者： Ran Tong yini Cao Zhihong Zhu Chenyang Lou Benzhi Zhou Tonggui Wu Qianjiangyuan Forest Ecosystem Research Station Research Institute of Subtropical ForestryChinese Academy of ForestryHangzhou 311400China East China Coastal Forest Ecosystem long-term Research Station Research Institute of Subtropical ForestryChinese Academy of ForestryHangzhou 311400China Guangdong Provincial Key Laboratory of Water Quality 313 Improvement and Ecological Restoration for Watersheds Institute of Environmental and Ecological EngineeringGuangdong 314 University of TechnologyGuangzhou 510006China Zhejiang A&F University Hangzhou 311300China

Background:Solar radiation(SR)plays critical roles in plant physiological processes and ecosystems ***,the exploration of SR influences on the biogeochemical cycles of forest ecosystems is still in a slow progress,and has important implications for the understanding of plant adaption strategy under future environmental ***,this research was aimed to explore the influences of SR on plant nutrient characteristics,and provided theoretical basis for introducing SR into the establishment of biochemical models of forest ecosystems in the future ***:We measured leaf nitrogen(N)and phosphorus(P)stoichiometry in 19 Chinese fir plantations across subtropical China by a field *** direct and indirect effects of SR,including global radiation(Global R),direct radiation(Direct R)and diffuse radiation(Diffuse R)on the leaf N and P stoichiometry were ***:The linear regression analysis showed that leaf N concentration had no association with SR,while leaf P concentration and N:P ratio were negatively and positively related to SR,*** least squares path model(PLS-PM)demonstrated that SR(*** R and Diffuse R),as a latent variable,exhibited direct correlations with leaf N and P stoichiometry as well as the indirect correlation mediated by soil P *** direct associations(path coefficient=−0.518)were markedly greater than indirect associations(path coefficient=−0.087).The covariance-based structural equation modeling(CB-SEM)indicated that SR had direct effects on leaf P concentration(path coefficient=−0.481),and weak effects on leaf N *** high SR level elevated two temperature indexes(mean annual temperature,MAT;≥10°C annual accumulated temperature,≥10℃ AAT)and one hydrological index(mean annual evapotranspiration,MAE),but lowered the soil P ***,MAE and soil P content could affect the leaf P concentration,which cause the indirect effect of SR on leaf P concentration(pa

关键词： Solar radiation Leaf Soil Nitrogen and phosphorus Stoichiometry Chinese fir

Latest Zircon U-Pb Geochronology of the Huoshiling Formation Volcanic Rocks in the Southeastern Margin of the Songliao Basin

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Acta Geologica Sinica(English Edition) 2017年第5期91卷 1924-1925页

作者： WANG Chenglong ZHANG Meisheng SUN Kai WANG yini LI Xiaobo LIU Xuesong College of Earth Sciences Jilin University Changchun 130061 Jilin China Exploration and Development Research Institute of Jilin Oilfield Company Songyuan 138000 Jilin China

Objective The Huoshiling Formation is the earliest volcanic stratum in the Songliao Basin,composed mainly of intermediate-basic volcanic rocks,with rare *** geological age of this formation has been controversial for ... 详细信息

关键词： Pb Latest Zircon U-Pb Geochronology of the Huoshiling Formation Volcanic Rocks in the Southeastern Margin of the Songliao Basin

Quick Phase Identification for Dense Seismic Array with Aid from long Term Phase Records of Co-located Sparse Permanent Stations

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Earthquake Research in China 2020年第3期34卷 328-342页

作者： CHEN yini LI Jun WANG Zhenjie ZHAO Mengqi YU Tiehong LI Danning YU Junyi WANG Weitao Zhejiang Earthquake Agency Hangzhou 310013China Key Laboratory of Earthquake Source Physics Institute of GeophysicsChina Earthquake AdministrationBeijing 100086China Yunnan Earthquake Agency Kunming 650224China

The phase identification and travel time picking are critical for seismic tomography,yet it will be challenging when the numbers of stations and earthquakes are *** here present a method to quickly obtain P and S travel times of pre-determined earthquakes from mobile dense array with the aid from long term phase records from co-located permanent *** records for 1768 M≥2.0 events from 2011 to 2013 recorded by 350 ChinArray stations deployed in Yunnan Province are processed with an improved AR-AIC method utilizing cumulative envelope and *** reference arrivals are predicted based on phase records from 88 permanent stations with similar spatial coverage,which are further refined with ***,718573 P picks and 512035 S picks are obtained from mobile stations,which are 28 and 22 times of those from permanent stations,*** comparing the automatic picks with manual picks from 88 permanent stations,for M≥3.0 events,81.5%of the P-pick errors are smaller than 0.5 second and 70.5%of S-pick errors are smaller than1 *** events with a lower magnitude,76.5%P-pick errors fall into 0.5 second and 69.5%S-pick errors are smaller than 1 ***,the Pn and Sn phases are easily discriminated from directly P/S,indicating the necessity of combining traditional auto picking and integrating machine learning method.

关键词： Phase picking Travel time Dense array Spatial overlap

Sequentially releasing self-healing hydrogel fabricated with TGFβ3-microspheres and bFGF to facilitate rat alveolar bone defect repair

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Asian Journal of Pharmaceutical Sciences 2022年第3期17卷 425-434页

作者： Fenglin Yu Dezhi Geng Zhanpeng Kuang Shiyi Huang Yating Cheng yini Chen Fang Leng Yu Bei Yueping Zhao Qingxia Tang Yadong Huang Qi Xiang Department of Cell Biology College of Life Science and TechnologyJinan UniversityGuangzhou 510632China Guangdong Province Key Laboratory of Bioengineering Medicine Jinan UniversityGuangzhou 510632China Biopharmaceutical R&D Center of Jinan University Guangzhou 510632China Department of Stomatology Jinan University Medical CollegeGuangzhou 510632China

Resorption and loss of alveolar bone leads to oral dysfunction and loss of natural or implant teeth. Biomimetic delivery of growth factors based on stem cell recruitment and osteogenic differentiation, as the key steps in natural alveolar bone regenerative process, has been an area of intense research in recent years. A mesoporous self-healing hydrogel(DFH) with basic fibroblast growth factor(bFGF) entrapment and transforming growth factor β3(TGFβ3)-loaded chitosan microspheres(CMs) was developed. The formulation was optimized by multiple tests of self-healing, in-bottle inversion, SEM, rheological, swelling rate and in vitro degradation. In vitro tubule formation assays, cell migration assays, and osteogenic differentiation assays confirmed the ability of DFH to promote blood vessels, recruit stem cells, and promote osteogenic differentiation. The optimum DFH formula is 0.05 ml 4ArmPEG-DF(20%) added to 1 ml CsGlu(2%) containing bFGF(80 ng) and TGFβ3-microspheres(5 mg). The results of in vitro release studied by Elisa kit, indicated an 95% release of b FGF in7 d and long-term sustained release of TGFβ3. For alveolar defects rat models, the expression levels of CD29 and CD45, the bone volume fraction, trabecular number, and trabecular thickness of new bone monitored by Micro-CT in DFH treatment groups were significantly higher than others(*P < 0.05, vs Model). HE and Masson staining show the same *** conclusion, DFH is a design of bionic alveolar remodelling microenvironment, that is in early time microvessels formed by b FGF provide nutritious to recruited endogenous stem cells, then TGFβ3 slowly released speed up the process of new bones formation to common facilitate rat alveolar defect repair. The DFH with higher regenerative efficiency dovetails nicely with great demand due to the requirement of complicated biological processes.

关键词： Self-healing hydrogel TGFβ3 microspheres bFGF Sequential release Alveolar defects

Electroacupuncture with different waveforms for primary dysmenorrhea:A randomized controlled trial

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Journal of Traditional Chinese Medical Sciences 2024年第3期11卷 357-362页

作者： Xiaona Wu Jingxue Yuan Jinxia Ni Xiuli Ma Ziniu Zhang yini Hua Juwei Dong Bob Peng Wang Dongzhimen Hospital Beijing University of Chinese MedicineBeijing 100700China New Zealand College of Chinese Medicine Auckland 17467New Zealand

Objective:To observe and compare the clinical effects of different electroacupuncture waveforms on primary ***: This was a prospective,randomized,three-group,parallel-controlled *** with primary dysmenorrhea were randomly divided into dense-sparse wave,continuous wave,and discontinuous wave groups in a 1:1:1 *** lateral Ciliao(BL 32)points were *** three groups started treatment 3–5 days before menstruation,once a day for six sessions per course of treatment,one course of treatment per menstrual cycle,and three menstrual *** primary outcome measure was the proportion with an average visual analog scale(VAS)score reduction of≥50%from baseline for dysmenorrhea in the third menstrual cycle during *** secondary outcome measures included changes in dysmenorrhea VAS scores,Cox Menstrual Symptom Scale scores and the proportion of patients taking analgesic ***: The proportion of cases where the average VAS score for dysmenorrhea decreased by≥50%from baseline in the third menstrual cycle was not statistically significant(P>.05).Precisely 30 min after acupuncture and regarding immediate analgesia on the most severe day of dysmenorrhea,there was a statistically significant difference in the dense-sparse wave group compared with the other two groups during the third menstrual cycle(Plong-term analgesic efficacy and a reduction in the number of patients taking analgesic *** achieving immediate analgesia,the dense-sparse wave group was slightly better than the other two groups.

关键词： Waveforms Ciliao(BL 32) Electroacupuncture Primary dysmenorrhea Randomized controlled trial Dense-sparse waves Continuous waves Discontinuous waves

基于三维地质模型的矢量地质剖面图实时生成技术

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地球科学 2022年第11期47卷 4256-4266页

作者：花卫华肖旖旎王振娟郑鹏闻龙刘修国中国地质大学地理与信息工程学院湖北武汉430074

为了解决目前剖面图生成的实时性、鲁棒性和准确性的问题,本研究提出从图像空间出发,利用双模板缓冲技术解决剖切问题的计算瓶颈,同时借助RTT(Render to Texture)相机技术和高分辨率技术实现任意直线切割下的剖面图高精度输出,最后将剖... 详细信息

为了解决目前剖面图生成的实时性、鲁棒性和准确性的问题,本研究提出从图像空间出发,利用双模板缓冲技术解决剖切问题的计算瓶颈,同时借助RTT(Render to Texture)相机技术和高分辨率技术实现任意直线切割下的剖面图高精度输出,最后将剖面图矢量化以获得带有属性的矢量图.实验证明,本研究提出的基于三维地质模型的矢量地质剖面图实时生成技术具有可实现性.通过与传统剖切对比,证明我们的方法在剖切效率上有高达99.9%的提升,实现了剖面图生成的实时性且输出的矢量剖面图地质界线一致且清晰.为地质行业进入三维化时代提供了一种基于三维地质模型的实时剖面图生成的新思路,对剖面图实时生成具有一定的参考意义.

关键词：三维地质体模型双模板缓冲 RTT相机实时剖切工程地质

一种消除三维地质模型边界裂缝的锁边LOD方法

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地球信息科学学报 2023年第5期25卷 967-981页

作者：王振娟花卫华刘修国郑鹏肖旖旎闻龙中国地质大学(武汉)地信学院武汉430074

本文针对采用传统LOD生成算法快速渲染大范围三维地质模型时连续性差的问题,提出一种消除三维地质模型边界裂缝的锁边LOD方法。(1)使用多级图划分算法并通过并行计算将网格分块问题快速转化为图分区问题,根据空间相邻关系将三角网格划... 详细信息

本文针对采用传统LOD生成算法快速渲染大范围三维地质模型时连续性差的问题,提出一种消除三维地质模型边界裂缝的锁边LOD方法。(1)使用多级图划分算法并通过并行计算将网格分块问题快速转化为图分区问题,根据空间相邻关系将三角网格划分为一系列大小相近的集群和集群组;(2)基于二次误差测量的网格简化算法锁定集群组边界进行简化以生成更高层级的LOD数据,在简化时通过增加边界边权值实现集群组的锁边简化,自下而上地构建起不同级别集群和集群组的依赖关系;(3)有效生成模型各级LOD渐进数据块,并采用分页机制编码数据块。本文使用基于钻孔数据所构建的三维地质模型,对模型执行集群和集群组的划分、约束外边界的网格简化等操作来构建LOD,并对LOD数据进行编码。实验结果表明本文方法可生成各级简化率约为50%的LOD以消除三维地质模型高低精度数据块之间的裂缝,实现了三维地质模型可视化时较好的连续性表达,为地下空间透明化和大范围地质模型可视化提供支撑。

关键词： LOD 三维地质模型裂缝锁边集群集群组多级图分区算法 QEM算法

The molecular,electrophysiological,and structural changes in the vestibular nucleus during vestibular compensation:a narrative review

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Journal of Bio-X Research 2021年第4期4卷 158-162页

作者： Pengjun Wang Wen Lu yini Li Haibo Shi Shankai Yin Department of Otorhinolaryngology-Head&Neck Surgery Shanghai Sixth People’s Hospital Affiliated to Shanghai Jiao Tong UniversityShanghaiChina

The vestibular system involves high-level sensory and cognitive processes,such as spatial perception,balance control,visual stability,and emotional *** dysfunction can induce vertigo,blurred vision,postural imbalance,walking instability,and spatial discomfort,which causes serious damage to *** has long been known that after peripheral vestibular lesion,vestibular dysfunction may spontaneously *** is known as vestibular ***,at least 20%to 30%of patients with vestibular disorders cannot yield vestibular compensation and remain with vestibular dysfunction for the rest of their *** exploration of the biological characteristics and regulatory factors of the loss and reestablishment of vestibular function will establish a new understanding of the mechanism of vestibular compensation and provide new tools and strategies for promoting vestibular *** aim to comprehensively review the mechanism of vestibular compensation and discuss future directions in this field.

关键词： mechanism molecular biology neurogenesis vestibular compensation vestibular nucleus