检索结果-南通市图书馆

A novel sequence batch membrane carbonation photobioreactor developed for microalgae cultivation

在线全文

学校读者我要写书评

暂无评论

Frontiers of Environmental Science & Engineering 2019年第6期13卷 127-136页

作者： Caiyun Hou sen qiao Yue Yang Jiti Zhou Key Laboratory of Industrial Ecology and Environmental Engineering(Ministry of Education) School of Environmental Science and TechnologyDalian University of TechnologyDalian 116024China

In this study,a novel sequence batch membrane carbonation photobioreactor was developed for microalgae ***,membrane module was endowed functions as microalgae retention and CO2 *** results in the batch experiments expressed that the relatively optimal pore size of membranes was 30 nm,photosynthetically active radiation was 36 W/m^2 and the CO2 concentration was 10%(v/v).In long-term cultivation,the microalgal concentration separately accumulated up to 1179.0 mg/L and 1296.4 mg/L in two *** concentrations of chlorophyll a,chlorophyll b and carotenoids were increased about 23.2,14.9 and 6.3 mg/L respectively in period I;meanwhile,the accumulation was about 25.0,14.5,6.6 mg/L respectively in the periodⅡ.Furthermore,the pH was kept about 5.5-7.5 due to intermittent carbonation mode,which was suitable for the growth of *** pressure(TMP)was only increased by 0.19 and 0.16 bar in the end of periodsⅠandⅡ,*** pure flux recovered to 75%-80%of the original value by only hydraulic *** electron microscope images also illustrated that carbonation through membrane module could mitigate fouling levels greatly.

关键词： Membrane carbonation SBM-C-PBR Cultivate microalgae Membrane fouling

Cooperative Covert Communication in Multi-Antenna Broadcast Channels

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

China Communications 2024年第6期21卷 246-260页

作者： qiao sen Liu Guangjie Ji Xiaopeng Liu Weiwei School of Electrical and Information Engineering Nanjing University of Information Science and TechnologyNanjing 210044China School of Automation Nanjing University of Science and TechnologyNanjing 210094China

With the gradual popularization of 5G communications,the application of multi-antenna broadcasting technology has become ***,this study aims to investigate the wireless covert communication in the two-user cooperative multi-antenna broadcast *** focus on the issue that the deteriorated reliability and undetectability are mainly affected by the transmission *** tackle this issue,we design a scheme based on beamforming to increase the reliability and undetectability of wireless covert communication in the multi-antenna broadcast *** first modeled and analyzed the cooperative multi-antenna broadcasting system,and put forward the target *** we use the SCA(successive convex approximation)algorithm to transform the target problem into a series of convex *** the convex problems are solved and the covert channel capacity is *** order to verify the effectiveness of the scheme,we conducted simulation *** simulation results show that the proposed beamforming scheme can effectively improve the reliability and undetectability of covert communication in multi-antenna broadcast channels.

关键词： beamforming covert communication multi-antenna broadcast channels OFDM

Start-up of the anammox process from the conventional activated sludge in a hybrid bioreactor

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2012年第6期24卷 1083-1090页

作者： Xiumei Duan Jiti Zhou sen qiao Xin Yin Tian Tian Fangdi Xu Key Laboratory of Industrial Ecology and Environmental Engineering MOESchool of Environmental Science and TechnologyDalian University of TechnologyDalian 116024China

The anaerobic ammonium oxidation （anammox） process was successfully started up from conventional activated sludge using a hybrid bioreactor within 2 *** average removal efficiencies of ammonia and nitrite were both over 80%,and the maximum total nitrogen removal rate of 1.85 kg N/（m^3 ·day） was obtained on day 362 with the initial sludge concentration of 0.7 g mixed liquor suspended solids （MLSS）/*** electron microscope （SEM） observation of the granular sludge in the hybrid reactor clearly showed a high degree of compactness and cell sphericity,and the cell size was quite *** electron microscope photos showed that cells were round or oval,the cellular diameter was 0.6-1.0 μm,and the percentage of the anammoxosome compartment was 51%-85% of the whole cell *** in situ hybridization analysis （FISH） indicated that anammox bacteria became the dominant population in the community （accounting for more than 51% of total bacteria on day 250）.Seven planctomycete 16S rRNA gene sequences were present in the 16S rRNA gene clone library generated from the biomass and affiliated to Candidatus Kuenenia stuttgartiensis and Candidatus Brocadia sp.,a new anammox *** addition,the average effluent suspended solid （MLSS） concentrations of outlets I （above the non-woven carrier） and II （below the non-woven carrier） were 0.0009 and 0.0035 g/L,*** showed that the non-woven carrier could catch the biomass effectively,which increased biomass and improved the nitrogen removal rate in the reactor.

关键词： anammox hybrid bioreactor fluorescence in situ hybridization 16S rRNA gene clone library

Charge transfer complex enabled photoreduction of ether phosphonium salts for the selective oxyalkylation of enamides

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2024年第2期35卷 411-414页

作者： sen qiao Kunquan Chen Qiang Liu Zhixiang Wang Xiangyu Chen School of Chemical Sciences University of the Chinese Academy of SciencesBeijing 100049China Binzhou Institute of Technology Weiqiao-UCAS Science and Technology ParkBinzhou 256606China

A charge transfer complex(CTC)-enabled photoreduction of ether phosphonium salts for the generation of oxyalkyl radicals was *** photoreduction provides a convenient method to achieve selective oxyalkylation of enamid... 详细信息

关键词： Enamides Phosphonium salts Ethers Charge transfer complex Visible light

Opportunities and challenges of three-dimensional printing technology in pharmaceutical formulation development

在线全文

学校读者我要写书评

暂无评论

Acta Pharmaceutica Sinica B 2021年第8期11卷 2488-2504页

作者： Mengsuo Cui Hao Pan Yupei Su Dongyang Fang sen qiao Pingtian Ding Weisan Pan Department of Pharmaceutics School of PharmacyShenyang Pharmaceutical UniversityShenyang 110016China School of Pharmacy Liaoning University66 Chongshan Middle RoadShenyang 110036China

Three-dimensional printing is a technology that prints the products layer-by-layer,in which materials are deposited according to the digital model designed by computer aided design(CAD)*** technology has competitive advantages regarding product design complexity,product personalization,and on-demand *** emergence of 3 D technology provides innovative strategies and new ways to develop novel drug delivery *** review summarizes the application of 3 D printing technologies in the pharmaceutical field,with an emphasis on the advantages of 3 D printing technologies for achieving rapid drug delivery,personalized drug delivery,compound drug delivery and customized drug *** addition,this article illustrates the limitations and challenges of 3 D printing technologies in the field of pharmaceutical formulation development.

关键词： Three-dimensional printing technology Drug delivery system Pharmaceutical Personalized medicine Additive manufacturing On-demand manufacturing Advantages Limitations and challenges

Mechanism Exploration of Euphorbia fischeriana Steud. for Liver Cancer Based on Aspartic Acid Identification in Metabolomics

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Integrative Medicine 2024年第6期30卷 507-514页

作者： ZHAO Jing TIAN Xin-chen ZHANG Jia-qi HUANG Chen SUN Yan qiao sen JIANG Shu-long Clinical Medical Laboratory Center Jining First People’s HospitalJiningShandong Province272000China Cheeloo College of Medicine Shandong UniversityJinan250000China

Objective:To investigate the anti-liver cancer effects and aspartic acid(Asp)-related action mechanism of Euphorbia fischeriana Steud.(LD).Methods:The mice model of liver cancer was established by injection of H22 *** 5 days,mice were randomly divided into model group,sorafenib group(20 mg/kg),LD high-dose(LDH,1.36 g/kg) group,LD medium-dose(LDM,0.68 g/kg) group,and LD low-dose(LDL,0.34 g/kg)group,10 mice each *** were intragastrically administered to the mice once daily for 10 days,*** weight,tumor size and tumor weight were *** index was *** changes of liver cancer tissues were evaluated by hematoxylin and eosin staining and TUNEL *** chromatography-mass spectrometer was used to analyze different metabolites between the model and LDH ***:After LD treatment,tumor weight,tumor size and hepatic index were reduced compared with the model *** and karyorrhexis of tumor cells were ***,61 differential metabolites(18 up-regulated,43 down-regulated) were affirmed and 20 pathways of KEGG(P<0.05) were *** addition,Bel-7402,HepG2 and H22 cell viabilities were significantly increased after adding Asp into the *** then,the cell proliferation effect induced by Asp was ameliorated by ***:The anti-liver cancer efficacy of LD extract was validated in H22 mice model,and inhibition of Asp level might be the underlying mechanism.

关键词： liver cancer Euphorbia fischeriana Steud. aspartic acid metabolomics

Active source monitoring at the Wenchuan fault zone:coseismic velocity change associated with aftershock event and its implication

在线全文

学校读者我要写书评

暂无评论

Earthquake Science 2014年第6期27卷 599-606页

作者： Wei Yang Hongkui Ge Baoshan Wang Jiupeng Hu Songyong Yuan sen qiao Key Laboratory of Seismic Observation and Geophysical Imaging Institute of Geophysics China Earthquake Administration Unconventional Natural Gas Institute China University of Petroleum

With the improvement of seismic observation system, more and more observations indicate that earthquakes may cause seismic velocity change. However, the amplitude and spatial distribution of the velocity variation remains a controversial issue. Recent active source monitoring carried out adjacent to Wenchuan Fault Scientific Drilling （WFSD） revealed unambiguous coseismic velocity change associated with a local M8 5.5 earthquake. Here, we carry out forward modeling using two-dimensional spectral element method to further investigate the amplitude and spatial distribution of observed velocity change. The model is well constrained by results from seismic reflection and WFSD coring. Our model strongly suggests that the observed coseismic velocity change is localized within the fault zone with width of ~ 120 m rather than dynamic strong ground shaking. And a velocity decrease of -2.0 % within the fault zone is required to fit the observed travel time delay distribution, which coincides with rock mechanical experiment and theoretical modeling.

关键词： Wenchuan fault zone Coseismic velocity change Accurately Controlled Routinely Operated Seismic Source (ACROSS) Active monitoring Forward modeling

Synthesis of flower-like WS_(2) by chemical vapor deposition

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2021年第12期30卷 523-528页

作者： Jin-Zi Ding Wei Ren Ai-Ling Feng Yao Wang Hao-sen qiao Yu-Xin Jia Shuang-Xiong Ma Bo-Yu Zhang Institute of Physics&Optoelectronics Technology Baoji University of Arts and SciencesBaoji 721016China School of Science Xi’an University of Posts&TelecommunicationsXi’an 710121China

Flower-like tungsten disulfide(WS_(2))with a diameter of 5-10μm is prepared by chemical vapor deposition(CVD).Scanning electron microscopy(SEM),energy dispersive spectrometer(EDS),Raman spectroscopy,and ultraviolet-visible(UV-vis)spectroscopy are used to characterize its morphological and optical properties,and its growth mechanism is *** key factors for the formation of flower-like WS_(2)are ***,the cooling process causes the generation of nucleation dislocations,and then the"leaf"growth of flower-like WS_(2)is achieved by increasing the temperature.

关键词： flower-like WS_(2) chemical vapor deposition(CVD) optical property growth mechanism

深冷轧制制备超细晶纯铝的微观组织与热稳定性研究

在线全文

学校读者我要写书评

暂无评论

塑性工程学报 2021年第2期28卷 102-108页

作者：乔及森王兵兰州理工大学材料科学与工程学院甘肃兰州730050 兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室甘肃兰州730050

采用深冷轧制的方法制备了超细晶纯铝,通过扫描电子显微镜、透射电子显微镜以及背散射电子衍射等技术表征了不同应变量下纯铝的微观组织;并且利用自动硬度计分析了纯铝的力学性能;同时对应变为2.7时的试样进行退火处理,研究了超细晶纯... 详细信息

采用深冷轧制的方法制备了超细晶纯铝,通过扫描电子显微镜、透射电子显微镜以及背散射电子衍射等技术表征了不同应变量下纯铝的微观组织;并且利用自动硬度计分析了纯铝的力学性能;同时对应变为2.7时的试样进行退火处理,研究了超细晶纯铝的热稳定性。研究表明,纯铝变形过程中,随着应变的增加,晶粒尺寸明显得到细化,达到饱和状态时晶粒尺寸为340 nm,其形貌主要是层片结构,且存在大量的小角度晶界;变形态纯铝的显微维氏硬度随着应变的增加而逐渐增加,当晶粒尺寸为340 nm时,硬度可达到44 HV;此外,超细晶纯铝在退火过程中的晶粒尺寸随着温度的升高而增加,在200℃下退火30 min后晶粒尺寸为1μm。

关键词：纯铝深冷轧制微观组织力学性能热稳定性