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Effect of Seasonality on Distribution of Macroalgae in a Stream System(Xin'an Spring) in Shanxi Province,North China

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Journal of Integrative Plant Biology 2006年第8期48卷 889-896页

作者： Bian-Fang Hu Shu-lian xie School of Life Science and Technology Shanxi University Taiyuan 030006 China

A survey of the seasonal distribution of macroalgae in a stream system in Shanxi Province, north China, was undertaken from July 2004 to April 2005. The relative abundance and percentage cover of macroalgae, and several environmental factors were monitored along a 20-m stretch at each of four sites, at intervals of approximately three months （one sampling per season）. Several stream conditions were relatively constant over the sampling period （pH, maximum width and maximum depth）, whereas others exhibited a distinct seasonal pattern （water temperature and specific conductance）, and some fluctuated with no discernable seasonal pattern （current velocity and dissolved oxygen）. Forty-two species of macroalgae were found, with a predominance of Chlorophyta （26 species, 61.9%）. Rhodophyts and Charophyta represented the smallest proportion （1 species each, 2.38%）. Six macroalgae species were the most widespread, occurring in all four sampling sites. Twelve species were found at only one site each. In terms of seasonality, eight species occurred throughout the year, whereas 16 species were found in only one season each. The macroalgal community at Xin＇an Spring was species rich relative to other streams. Species richness per sampling site was negatively correlated with pH. Principal component analysis revealed that no single variable had much influence on the macroalgal seasonal dynamics. We calculated Sorensen similarity indices to compare our study with other continent-wide surveys of stream macroalgae, but the similarity indices were all very low. This study also shows that macroalgae in different locations have significant reproductive isolation.

关键词： China distribution environmental factors seasonality stream macroalgae.

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Derivation of a wave-state-dependent sea spray generation function and its application in estimating sea spray heat flux

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Science China Earth Sciences 2015年第10期58卷 1862-1871页

作者： LIU Bin GUAN ChangLong xie lian ZHAO Dongliang Physical Oceanography Laboratory Ocean University of China Department of Marine Earth and Atmospheric Sciences North Carolina State University

A sea spray generation function(SSGF)for bubble-derived droplets that takes into account the impact of wave state on whitecap coverage was presented in this *** combining the new SSGF with a previous wave-state-dependent SSGF for spume droplets,an SSGF applicable to both bubble-derived and spume droplets that includes the impacts of wave state was *** produced SSGF varies with surface wind as well as with wave *** sea surface wind increases,more sea spray droplets are produced,resulting in larger SSGFs and volume ***,under the same wind conditions,the SSGF is mediated by wave state,with larger SSGFs corresponding to older waves and larger windsea Reynolds *** impact of wave state on sea spray heat flux was then estimated by applying this SSGF while considering the thermodynamic feedback *** given atmospheric and oceanic conditions,the estimated sea spray heat flux increases with wind speed,wave age,and windsea Reynolds number.

关键词： wave state sea spray sea spray generation function air-sea heat flux

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Influence of Qinghai-Xizang Plateau snow cover on interannual variability of Western North Pacific tropical cyclone tracks

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Journal of Oceanology and Limnology 2023年第6期41卷 2060-2076页

作者： Zhaohua WANG Dongliang ZHAO Kejian WU lian xie Ocean University of China Qingdao 266100China Department of Marine Earth and Atmospheric SciencesNorth Carolina State UniversityBox 8208RaleighNC 27695USA

Track density function(TDF)was computed for all Western North Pacific tropical cyclones(WNP TCs)tracks from 1950 to 2018,and the TDFs were further investigated using principal component analysis(PCA)to analyze their inter-annual spatial and temporal ***,the relationships between each empirical orthogonal function(EOF)mode and the typhoon count,typhoon landfall count,track pattern,and the Qinghai-Xizang Plateau snow cover(QXPSC)were examined,and the possible physical mechanisms implied by the statistical relationship were *** results show the QXPSC significantly affected the surface-atmosphere heat exchange through snow cover(SC)level,then changed the East Asian summer monsoon regional circulation pattern,influenced the subtropical high-pressure system strength and location,and ultimately affected the WNP TCs track patterns and thus changed their landfall locations.

关键词： tropical cyclone Qinghai-Xizang Plateau snow cover track pattern landfall location

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Rainfall effect on wind waves and the turbulence beneath air-sea interface

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Acta Oceanologica Sinica 2013年第11期32卷 10-20页

作者： ZHAO Dongliang MA Xin LIU Bin xie lian Physical Oceanography Laboratory Ocean University of China Department of Marine Earth and Atmospheric SciencesNorth Carolina State University

Rainfall effects on wind waves and turbulence are investigated through the laboratory experiments in a large wind-wave tank. It is found that the wind waves are damped as a whole at low wind speeds, but are enhanced at high wind speeds. This dual effect of rain on the wind waves increases with the increase of rain rate, while the influence of rainfall-area length is not observable. At the low wind speed, the corresponding turbulence in terms of the turbulent kinetic energy （TKE） dissipation rate is significantly enhanced by rain- fall as the waves are damped severely. At the high wind speed, the augment of the TKE dissipation rate is suppressed while the wind waves are enhanced simultaneously. In the field, however, rainfall usually hin- ders the development of waves. In order to explain this contradiction of rainfall effect on waves, a possibility about energy transfer from turbulence to waves in case of the spectral peak of waves overlapping the inertial subrange of turbulence is assumed. It can be applied to interpret the damping phenomenon of gas trans- fer velocity in the laboratory experiments, and the variation of the TKE dissipation rates near sea surface compared with the law of wall.

关键词： rainfall wind wave wave age turbulence turbulent kinetic energy

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A condition-based maintenance policy for reconfigurable multi-device systems

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Advances in Manufacturing 2024年第2期12卷 252-269页

作者： Shu-lian xie Feng Xue Wei-Min Zhang Jia-Wei Zhu School of Mechanical Engineering Tongji UniversityShanghai201804People’s Republic of China

The exploration of component states for optimizing maintenance schedules in complex systems has garnered significant interest from ***,current literature usually overlooks the critical aspects of system flexibility and *** implementation of system reconfiguration can effectively mitigate system downtime and enhance production *** study proposes a dynamic condition-based maintenance policy considering reconfiguration for reconfigurable systems.A double-layer decision rule was constructed for the devices and *** achieve the best overall maintenance effect of the system,the remaining useful life probability distribution and recommended maintenance time of each device were used to optimize the concurrent maintenance time window of the devices and determine whether to reconfigure them.A comprehensive maintenance efficiency index was introduced that simultaneously considered the maintenance cost rate,reliability,and availability of the system to characterize the overall maintenance *** reconfiguration cost was included in the maintenance *** proposed policy was tested through numerical experiments and compared with different-level *** results show that the proposed policy can significantly reduce the downtime and maintenance costs and improve the overall system reliability and availability.

关键词： Condition-based maintenance(CBM) Reconfigurable system Remaining useful life Maintenance cost System reliability

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Problems, challenges and future of plant disease management: from an ecological point of view

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Journal of Integrative Agriculture 2016年第4期15卷 705-715页

作者： HE Dun-chun ZHAN Jia-sui xie lian-hui Fujian Key Lab of Plant Virology Institute of Plant Virology Fujian Agriculture and Forestry University Key Lab for Biopesticide and Chemical Biology Ministry of EducationFujian Agriculture and Forestry University

Plant disease management faces ever-growing challenges due to：（i） increasing demands for total, safe and diverse foods to support the booming global population and its improving living standards; （ii） reducing production potential in agriculture due to competition for land in fertile areas and exhaustion of marginal arable lands; （iii） deteriorating ecology of agro-ecosystems and depletion of natural resources; and （iv） increased risk of disease epidemics resulting from agricultural intensification and monocultures. Future plant disease management should aim to strengthen food security for a stable society while simultaneously safeguarding the health of associated ecosystems and reducing dependency on natural resources. To achieve these multiple functionalities, sustainable plant disease management should place emphases on rational adaptation of resistance, avoidance, elimination and remediation strategies individually and collectively, guided by traits of specific host-pathogen associations using evolutionary ecology principles to create environmental （biotic and abiotic） conditions favorable for host growth and development while adverse to pathogen reproduction and evolution.

关键词： disease resistance avoidance elimination and remediation ecological plant disease management evolutionaryprinciple food security plant disease economy

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2D magnetotelluric inversion based on ResNet

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Artificial Intelligence in Geosciences 2023年第1期4卷 119-127页

作者： lian xie Bo Han Xiangyun Hu Ningbo Bai Institute of Geological Survey China University of GeosciencesWuhan430074China Hubei Subsurface Multi-Scale Imaging Key Laboratory School of Geophysics and GeomaticsChina University of GeosciencesWuhan430074China Key Laboratory of Geological Survey and Evaluation of Ministry of Education China University of GeosciencesWuhan430074China

In this study,a deep learning algorithm was applied to two-dimensional magnetotelluric(MT)data *** with the traditional linear iterative inversion methods,the MT inversion method based on convolutional neural networks(CNN)does not rely on the selection of the initial model parameters and does not fall into the local *** the CNN inversion models can provide a clear electrical interface division,their inversion results may remain prone to abrupt electrical interfaces as opposed to the actual underground electrical *** solve this issue,a neural network with a residual network architecture(ResNet-50)was constructed in this *** the apparent resistivity and phase pseudo-section data as the inputs and with the resistivity parameters of the geoelectric model as the training labels,the modified ResNet-50 model was trained end-to-end for producing samples according to the corresponding production strategy of the study *** experiments,the training of the ResNet-50 with the dice loss function effectively solved the issue of over-segmentation of the electrical interface by the cross-entropy function,avoided its abrupt inversion,and overcame the computational inefficiency of the traditional iterative *** proposed algorithm was validated against MT data measured from a geothermal field prospect in Huanggang,Hubei Province,which showed that the deep learning method has opened up broad prospects in the field of MT data inversion.

关键词： Magnetotellurics 2D inversion Residual network Deep learning

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Study on Oil Film Model of Electronic Fuel Injection Motorcycle Engine Cylinder

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Energy Engineering 2021年第1期118卷 163-172页

作者： Shusheng Xiong Qiujie Song Wei Li lian xie College of Energy Engineering Zhejiang UniversityHangzhou310027China School of Mechanical Engineering Zhejiang UniversityHangzhou310027China Zhejiang FAI Electronics Co. Ltd.Hangzhou310027China

Based on the principles of heat transfer,an oil film model in the engine cylinder was *** the condition of cold state,the influence of factors such as engine fuel injection,fuel drop point,cylinder inner wall temperature,and inlet fluid on the oil film is comprehensively considered to establish an oil film quality prediction *** on the measurement of the compensation oil quantity in the transition conditions,the variation of the oil film during the transition is *** experimental results show that the velocity of the air-flow in the intake port and the temperature and pressure on the wall of the intake port are the main factors affecting the oil film in the *** on the abovementioned experimental and theoretical studies,an oil film distribution model for each cycle of the transition condition was established based on the engine inlet oil film *** experimental measurement curve and model prediction curve for the fuel compensation per cycle in the transition condition from 10%load to 30%*** model established can be in good agreement with the experimental results and meet the fuel compensation trend in the transition *** realizing the fuel compensation for the transient conditions,this work is definitely helpful to achieve accurate control of the air-fuel ratio.

关键词： Engine oil film in cylinder air-fuel ratio oil film model simulation

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Triple bottom-line consideration of sustainable plant disease management:From economic,sociological and ecological perspectives

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Journal of Integrative Agriculture 2021年第10期20卷 2581-2591页

作者： HE Dun-chun Jeremy J.BURDON xie lian-hui Jiasui ZHAN Institute of Eco-technological Economics School of Economics and TradeFujian Jiangxia UniversityFuzhou 350108P.R.China Fujian Key Lab of Plant Virology Institute of Plant VirologyFujian Agriculture and Forestry UniversityFuzhou 350002P.R.China CSIRO Agriculture CanberraA.C.T.2601Australia Department of Forest Mycology and Plant Pathology Swedish University of Agricultural SciencesUppsala 75007Sweden

Plant disease management plays an important role in achieving the sustainable development goals of the United Nations(UN)such as food security,human health,socio-economic improvement,resource conservation and ecological ***,technologies available are often limited due to different interests between producers and society and lacks of proper understanding of economic thresholds and the complex interactions among ecology,productivity and profitability.A comprehensive synergy and conflict evaluation of economic,sociological and ecological effects with technologies,productions and evolutionary principles as main components should be used to guide sustainable disease management that aims to mitigate crop and economic losses in the short term while maintaining functional farm ecosystem in the long ***,there should be an increased emphasis on technology development,public education and information exchange among governments,researchers,producers and consumers to broaden the options for disease management in the future.

关键词： plant disease management agricultural sustainability disease economics food security resource conservation

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The prognosis of trabeculectomy in primary angleclosure glaucoma patients

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International Journal of Ophthalmology(English edition) 2019年第1期12卷 66-72页

作者： Jun-Dong Zhu Li-lian xie Zhi-Yuan Li Xiao-He Lu Department of Ophthalmology Zhujiang Hospital of Southern Medical University Department of Ophthalmology the First People’s Hospital of Chenzhou CitySouthern Medical University

AIM: To evaluate whether the level of thrombospondin-1(TSP-1) in aqueous humor can predict the prognosis of trabeculectomy in patients with primary angle-closure glaucoma(PACG). METHODS: This case-control study involved 26 patients with PACG who experienced a failed trabeculectomy(case group) and 78 age-and sex-matched patients with PACG who underwent successful trabeculectomy(control group). Aqueous humor was collected at the time of trabeculectomy and tested for TSP-1 and TGF-β2 levels with an enzyme-linked immunosorbent assay method. Logistic regression modeling was used to assess the risk factors for failed trabeculectomy. RESULTS: The mean TSP-1 aqueous concentrations were significantly higher in the case group(20.67±9.79 ng/mL) than the control group(5.17±2.29 ng/mL)(P<0.001). The transforming growth factor-β2(TGF-β2) aqueous concentrations were significantly different between the case and control group, at 3633.25 and 1090.24 pg/mL, respectively(P<0.001). Logistic regression analysis revealed TSP-1 level as an independent risk factor for a failed trabeculectomy(OR=3.540; 95%CI=1.092-11.482). CONCLUSION: The aqueous humor TSP-1 and TGF-β2 levels are higher in PACG eyes with failed trabeculectomy than with successful trabeculectomy at one year. The aqueous humor TSP-1 level is an independent risk factor associated with failed trabeculectomy.

关键词： thrombospondin-1 prognosis primary angleclosure glaucoma

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