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Capacity of FH wireless multi-hop networks

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The Journal of China Universities of Posts and Telecommunications 2009年第6期16卷 78-83页

作者： WEI Dong-yan WANG Wen-bo PENG mu-gen Key Laboratory of Universal Wireless Communication Ministry of Education Beij hag University of Posts and Telecommunications Beijing 100876 China

In this article,the capacity of wireless multi-hop networks with the frequency hopping（FH） technique is *** from the previous work based on non-spread spectrum（SS） system,this study is based on frequency hopping spread spectrum（FHSS） and the retransmission *** analysis results show that the normalized transport capacity decreases as 1/Mλ,when the total available frequency band is divided into M sub-bands for frequency hopping and the nodes are randomly distributed in space according to a Poisson point process with intensity λ .In this work,the best transmission range per hop to get the maximum capacity is also ***,the results summarize how the capacity of FH wireless multihop networks is affected by the outage probability,target signal to interference plus noise ratio（SINR） and other system parameters.

关键词： multihop frequency hopping capacity

A novel synthetic route to rac-(Z)-recifeiolide from cyclooctanone and acetaldehyde

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Chinese Chemical Letters 2015年第11期26卷 1393-1396页

作者： Wen-bo mu Yue Zou Quan-Rui Wang Andreas Goeke Department of Chemistry Fudan University Fragrance Ingredient Research Center Givaudan Fragrances (Shanghai) Ltd.

A novel synthetic approach to （±）-Z-recifeiolide 6, a 12-membered-ring lactone which can be selectively isomerized into （E）-recifeiolide, a natural antibiotic product isolated from fungus （Cephalosporium recifei） is reported. The synthesis is accomplished in five steps starting from readily available cyclooctanone and acetaldehyde based on the Lewis acid-catalyzed TMS-directed oxy-2-oxonia-Cope rearrangement. The work represents a novel strategy to assemble related macrolides.

关键词： SynthesisAlkenolideRecifeiolideOxonia-Cope rearrangementLewuis acid

Treatment of drilling wastewater using a weakly basic resin

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Petroleum Science 2008年第3期5卷 275-279页

作者： Lu Rongh mu bo Zhang Hongyan Guo Shaohui School of Chemical Science ＆ Engineering China University of Petroleum Beijing 102249 China

Macroporous weak basic anion exchanger （D301R） was used to remove organic substances from drilling wastewater. The effect of pH, temperature and contact time on adsorption behavior was investigated in batch experiments, which indicated that the COD （Chemical Oxygen Demand） removal ratio of drilling wastewater was approximately 90%, and the COD of treated wastewater was below 70 mg/L under appropriate operating conditions. A mixed liquor of NaOH and NaCI was selected as desorbent because of its better elution performance. The results of column dynamic adsorption and regeneration showed that the COD of wastewater could be efficiently removed by D301R resin, and the resin was easily regenerated by the selected desorbent.

关键词： Ion-exchange drilling wastewater weak basic anion resin wastewater treatment

Excellent Structure-Based multifunction of Morpho Butterfly Wings： A Review

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Journal of Bionic Engineering 2015年第2期12卷 170-189页

作者： Shichao Niu bo Li Zhengzhi mu Meng Yang Junqiu Zhang Zhiwu Han Luquan Ren Key Laboratory of Bionic Engineering (Ministry of Education China) Jilin University Changchun 130022 China

Morpho butterfly, famous for its iridescence wing scales, has gradually evolved a diversity of functions and has attracted much attention recently. On the other hand, it is known that the wing surface of Morpho butterfly has some complex and so- phisticated structures. In fact, they are composed of an alternating multilayer film system of chitin and air layers, which have different refractive indexes. More importantly, these structures can interact strongly with visible light because the feature size of the structures is in the same order of magnitude with light wavelength. It is noteworthy that it is these optical architectures that cause the excellent multifunction including structural color, antireflection, thermal response, selective vapour response, direc- tional adhesion, superhydrophobicity and so on. This review mainly covers the excellent multifunctional features of Morpho butterfly wings with representative functional structures of multilayer film system, photonic crystal and ridges. Then, the mechanism of the structure-based optical multifunction of Morpho butterfly is analyzed. In order to facilitate mechanism analysis, the models of bionic functional structures are reported, as well as the interaction process between the multiscale structures and the external media It is concluded that these functions of Morpho butterfly wings have inevitable and corre- sponding regularity connection with the structural parameters and the dielectric coefficient of the filled medium. At last, the future direction and prospects of this field are briefly addressed. It is hoped that this review could be beneficial to provide some innovative insoirations and new ideas to the researchers in the fields of engineering, biomedicine, and materials science.

关键词： Morpho butterfly wing scales microstructure structure-based functions bionics

Characterization on the Mean Molar Absorptivity of Amino Acids in Microbial Lipopeptides

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Chinese Chemical Letters 2006年第4期17卷 517-520页

作者： Shi Zhong YANG Tao CHEN bo Zhong mu Dong Zhi WEI Department of Chemistry East China University of Science and Technology Shanghai 200237 Bioengineering Institute East China University of Science and Technology Shanghai 200237

The molar absorption coefficients of each of 14 kinds of amino acids were determined by the spectrophotometric method, and the mean molar absorption coefficients of 37 different mixtures of each with amino acid composition exactly equivalent to that of the peptide chain of the corresponding lipopeptide were determined based on calculation or experimental. The significance of the results is that the mean molar absorption coefficients strongly demonstrate the regular patterns, though different amino acids bear quite different molar absorption coefficients.

关键词： Molar absorption coefficient lipopeptide amino acid spectrophotometry,

Predictability Study of Weather and Climate Events Related to Artificial Intelligence Models

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Advances in Atmospheric Sciences 2025年第1期42卷 1-8页

作者： mu mu bo QIN Guokun DAI Department of Atmospheric and Oceanic Sciences&Institute of Atmospheric Sciences Fudan UniversityShanghai 200438China Shanghai Key Laboratory of Ocean-land-atmosphere boundary Dynamics and Climate Change Fudan UniversityShanghai 200438China Shanghai Frontiers Science Center of Atmosphere-Ocean Interaction Fudan UniversityShanghai 200438China CMA-FDU Joint Laboratory of Marine Meteorology Shanghai 200438China Key Laboratory of Polar Atmosphere-ocean-ice System for Weather and Climate Ministry of EducationShanghai 200438China

Conducting predictability studies is essential for tracing the source of forecast errors,which not only leads to the improvement of observation and forecasting systems,but also enhances the understanding of weather and climate *** the past few decades,dynamical numerical models have been the primary tools for predictability studies,achieving significant ***,with the advances in artificial intelligence(AI)techniques and accumulations of vast meteorological data,modeling weather and climate events using modern data-driven approaches is becoming trendy,where FourCastNet,Pangu-Weather,and GraphCast are successful *** this perspective article,we suggest AI models should not be limited to forecasting but be expanded to predictability studies,leveraging AI's advantages of high efficiency and self-contained optimization *** this end,we first remark that AI models should possess high simulation capability with fine spatiotemporal resolution for two kinds of predictability *** models with high simulation capabilities comparable to numerical models can be considered to provide solutions to partial differential equations in a data-driven ***,we highlight several specific predictability issues with well-determined nonlinear optimization formulizations,which can be well-studied using AI models,holding significant scientific *** addition,we advocate for the incorporation of AI models into the synergistic cycle of the cognition–observation–model *** predictability studies have the potential to transform“big data”to“big and better data”and shift the focus from“AI for forecasts”to“AI for science”,ultimately advancing the development of the atmospheric and oceanic sciences.

关键词： predictability artificial intelligence models simulation and forecasting nonlinear optimization cognition–observation–model paradigm

Validation and accuracy analysis of wind products from scatterometer onboard the HY-2B satellite

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Acta Oceanologica Sinica 2023年第2期42卷 74-82页

作者： Sheng Yang bo mu Haoqiang Shi Chaofei Ma Wu Zhou Juhong Zou Mingsen Lin National Satellite Ocean Application Service Ministry of Natural ResourcesBeijing100081China Key Laboratory of Space Ocean Remote Sensing and Application Ministry of Natural ResourcesBeijing100081China China Academy of Space Technology(Xi’an Branch) Xi’an710100China

The Chinese marine dynamic environment satellite HY-2B was launched in October 2018 and carries a Ku-band *** paper focuses on the accuracies of HY-2B scatterometer wind data during the period from November 2018 to May *** HY-2B wind data are validated against global moored buoys operated by the *** Data Buoy Center and Tropical Atmosphere Ocean,numerical model data by the National Centers for Environmental Prediction,and the Advanced Scatterometer data issued by the Remote Sensing *** results showed that the wind speeds and directions observed by the HY-2B scatterometer agree well with these buoy wind *** root-mean-squared errors(RMSEs)of the HY-2B wind speed and direction are 0.74 m/s and 11.74°,*** low wind speeds(less than 5 m/s),the standard deviation of the HY-2B-derived wind direction is higher than 20°,which implies that the HY-2B wind direction for low wind speeds is less accurate than that for moderate to high wind speed *** RMSE of the HY-2B wind speed is slightly larger in high latitude oceans(60°–90°S and 60°–90°N)than in low latitude ***,the dependence of the residuals on the cross-track location of wind vector cells and the stability of the HY-2B scatterometer wind products are *** wind stability assessment results indicate that a clear yearly oscillation is observed for the HY-2B wind speed bias which is due to seasonal weather *** general,the accuracy of HY-2B winds meets the operational precision requirement and is consistent with other wind data.

关键词： sea surface wind validation microwave remote sensing scatterometer

An effector of Erysiphe necator translocates to chloroplasts and plasma membrane to suppress host immunity in grapevine

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Horticulture Research 2023年第9期10卷 207-219页

作者： bo mu Zhaolin Teng Ruixin Tang Mengjiao Lu Jinfu Chen Xiangnan Xu Ying-Qiang Wen State Key Laboratory of Crop Stress Biology for Arid Areas College of HorticultureNorthwest A&F UniversityYangling 712100ShaanxiChina Key Laboratory of Horticultural Plant Biology and Germplasm Innovation in Northwest China Ministry of Agriculture and Rural AffairsYangling 712100ShaanxiChina College of Water Resources and Architectural Engineering Northwest A&F UniversityWeihui Road 23Yangling 712100ShaanxiChina

The powdery mildew(Erysiphe necator)is a prevalent pathogen hampering grapevine growth in the *** arsenal of candidate secreted effector proteins(CSEPs)was encoded in the *** genome,but it is largely unclear what role CSEPs plays during the *** *** the present study,we identified a secreted effector CSEP080 of ***,which was located in plant chloroplasts and plasma *** expressing CSEP080 promotes plant photosynthesis and inhibits INF1-induced cell death in tobacco *** found that CSEP080 was a necessary effector for the *** pathogenicity,which interacted with grapevine chloroplast protein VviB6f(cytochrome b6-f complex iron–sulfur subunit),affecting plant *** silencing VviB6f increased the plant hydrogen peroxide production,and the plant resistance to powdery *** addition,CSEP080 manipulated the VviPE(pectinesterase)to promote pectin *** results demonstrated the molecular mechanisms that an effector of *** translocates to host chloroplasts and plasma membrane,which suppresses with the grapevine immunity system by targeting the chloroplast protein VviB6f to suppress hydrogen peroxide accumulation and manipulating VviPE to promote pectin degradation.

关键词： immunity Erysiphe expressing

Renewable non-edible oils derived long chain (C24.1) bio-based zwitterionic surfactant with ultralow interfacial tension between crude oil and formation brine

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Green Chemical Engineering 2023年第3期4卷 346-355页

作者： Homely Isaya Mtui Fang-Hui Liu Wei Wang Jian-Qiao Lang Shi-Zhong Yang bo-Zhong mu State Key Laboratory of Bioreactor Engineering and School of Chemistry and Molecular Engineering East China University of Science and TechnologyShanghai200237China Engineering Research Center of Microbial Enhanced Oil Recovery Ministry of EducationEast China University of Science and TechnologyShanghai200237China Shanghai Collaborative Innovation Center for Biomanufacturing Technology Shanghai200237China

A new ultra-long chain monounsaturated 4-(N-nervonicamidopropyl-N,N-dimethylammonium)butane sulfonate(NDAS)zwitterionic surfactant with ultralow interfacial tensions was developed through the modification of nervonic acid derived from renewable non-edible seed oils by a simple and effective *** structure was characterized by ESI-HRMS,1 H NMR,and 13 C *** surfactant exhibited a strong interfacial activity(~10^(-4) mN/m)between the crude oil and the formation brine at a very low surfactant dosage(0.05 g/L)and at high salinity conditions,which is equivalent to 2%(w/w)of dosage of the most traditional surfactants used in the enhanced oil recovery ***,at a very low concentration(0.05 g/L),NDAS demonstrated strong NaCl compatibility up to 100 g/L,Ca^(2+)ions compatibility up to 200 mg/L,and temperature stability up to 90℃.The surface tension,emulsification,and biodegradability parameters were also *** work consolidates our hypothesis that increasing the hydrophobic chain length of a surfactant certainly contributes to the high interfacial activity and good compatibility of salts and ***,it will facilitate the design of a sustainable alternative to petroleum-based chemicals to develop bio-based surfactants and extend the domain of bio-based surfactants to new applications such as in enhanced oil recovery(EOR).

关键词： Bio-based surfactant Interfacial tension Salt tolerance Enhanced oil recovery Biodegradability