检索结果-南通市图书馆

Biomass-enhanced Janus sponge-like hydrogel with salt resistance and high strength for efficient solar desalination

GREEN ENERGY & ENVIRONMENT 2024年第11期9卷 1698-1710页

作者： Chu, Aqiang Yang, meng Chen, Juanli zhao, Jinmin Fang, Jing Yang, Zhensheng Li, Hao Hebei Univ Technol Sch Chem Engn & Technol Natl Local Joint Engn Lab Energy Conservat Chem Pr Tianjin 300401 Peoples R China

Interfacial solar-driven evaporation technology shows great potential in the field of industrial seawater desalination, and the development of efficient and low-cost evaporation materials is key to achieving large-scale applications. Hydrogels are considered to be promising candidates; however, conventional hydrogel-based interfacial solar evaporators have difficulty in simultaneously meeting multiple requirements, including a high evaporation rate, salt resistance, and good mechanical properties. In this study, a Janus sponge-like hydrogel solar evaporator (CPAS) with excellent comprehensive performance was successfully constructed. The introduction of biomass agar (AG) into the polyvinyl alcohol (PVA) hydrogel backbone reduced the enthalpy of water evaporation, optimized the pore structure, and improved the mechanical properties. Meanwhile, by introducing hydrophobic fumed nano-silica aerogel (SA) and a synergistic foaming-crosslinking process, the hydrogel spontaneously formed a Janus structure with a hydrophobic surface and hydrophilic bottom properties. Based on the reduction of the evaporation enthalpy and the modulation of the pore structure, the CPAS evaporation rate reached 3.56 kg m2 h-1 under one sun illumination. Most importantly, owing to the hydrophobic top surface and 3D-interconnected porous channels, the evaporator could work stably in high concentrations of salt-water (25 wt% NaCl), showing strong salt resistance. Efficient water evaporation, excellent salt resistance, scalable preparation processes, and low-cost raw materials make CPAS extremely promising for practical applications. (c) 2023 Institute of Process Engineering, Chinese Academy of Sciences. Publishing services by Elsevier B.V. on behalf of KeAi Communications Co., Ltd. This is an open access article under the CC BY-NC-ND license (http://***/licenses/by-nc-nd/4.0/).

关键词： Solar interfacial evaporation Hydrogel Biomass Desalination Salt resistance

来源：

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

Cytotoxic lignans from the roots and rhizomes of Diphylleia sinensis,a China's endemic plant species

引用

Chinese Journal of Natural Medicines 2024年第9期22卷 831-841页

作者： SUN Yanjun zhao Chen BAI Hongyun LI meng WANG Junmin HAO Zhiyou FENG Weisheng Co-construction Collaborative Innovation Center for Chinese Medicine and Respiratory Diseases by Henan&Education Ministry of China Henan University of Chinese MedicineZhengzhou 450046China Engineering and Technology Center for Chinese Medicine Development of Henan Province Zhengzhou 450046China School of Pharmacy Henan University of Chinese MedicineZhengzhou 450046China

Eight novel arylnaphthalide lactone lignans, designated as diphylignan A-H(1-8), and a new dibenzyltyrolactone lignan, designated as diphylignan I(9), were isolated from the roots and rhizomes of Diphylleia sinensis, along with two additional novel natural products(11 and 14) and four known metabolites(10, 12, 13, 15). The structural and stereochemical characterization of these compounds was accomplished using NMR spectroscopy and electronic circular dichroism(ECD) analysis. The cytotoxic activities of all isolated compounds were assessed against A-549 and SMMC-7721 cell lines. Notably, compound 2 demonstrated the most significant cytotoxicity, with IC_(50) values of 10.27 and 11.58 μmol·L^(-1) against A-549 and SMMC-7721 cell lines, respectively, exhibiting greater potency than the positive control, cisplatin.

关键词： Diphylleia sinensis Dibenzyltyrolactone Arylnaphthalide Cytotoxic

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Effect of length-width ratio of rounded rectangle aquaculture tank in dual-diagonal-inlet layout on hydrodynamics

引用

Journal of Oceanology and Limnology 2024年第5期42卷 1695-1709页

作者： meng LI Xiaozhong REN Shupeng DU Wei SUN Chenxu zhao Hangfei LIU Xianying SHI Key Laboratory of Environment Controlled Aquaculture(Dalian Ocean University) Ministry of EducationDalian 116023China College of Biosystems Engineering and Food Science(BEFS) Zhejiang UniversityHangzhou 310058China College of Ocean and Civil Engineering Dalian Ocean UniversityDalian 116023China

To adapt to the change of aquaculture workshop site,optimize the shape of aquaculture tanks and improve the utilization rate of breeding space,it is necessary to determine the appropriate length width ratio parameters of aquaculture *** this paper,computational fluid dynamics(CFD)technology is adopted to study the flow field performance of aquaculture tanks with different L/B ratios(L:the length;B:the width,of aquaculture tank)and different jet direction conditions(lengthways jet and widthways jet).A three-dimensional numerical calculation model of turbulence in rounded rectangle aquaculture tanks in dual-diagonal-inlet layout was *** directions are arranged lengthways and widthways,and the water flow velocity,resistance coefficient change,vorticity,*** analyzed under two working *** show that the flow field performance in aquaculture tank decreases with the increase of the L/B *** flow field performed well when L/B was 1.0-1.3,sharply dropped at 1.4-1.6,and poor at *** results provided a theoretical basis for the design and optimization in flow field performance of the industrialized circulating aquaculture tanks.

关键词： aquaculture tank length-width ratio computational fluid dynamic hydrodynamic

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Influence of O-O formation pathways and charge transfer mediator on lipid bilayer membrane-like photoanodes for water oxidation

引用

Journal of Energy Chemistry 2024年第6期93卷 526-537,I0013页

作者： Yingzheng Li Shaoqi Zhan Zijian Deng meng Chen Yilong zhao Chang Liu Ziqi zhao Hongxia Ning Wenlong Li Fei Li Licheng Sun Fusheng Li State Key Laboratory of Fine Chemicals Frontier Science Center for Smart MaterialsDalian University of Technology116024 DalianLiaoningChina Department of Chemistry-Ångström Uppsala UniversityBox 52375120 Uppsal1Sweden Center of Artificial Photosynthesis for Solar Fuels School of ScienceWestlake UniversityHangzhou 310024ZhejiangChina

Inspired by the function of crucial components in photosystemⅡ(PSⅡ),electrochemical and dyesensitized photoelectrochemical(DSPEC)water oxidation devices were constructed by the selfassembly of well-designed amphipathic Ru(bda)-based catalysts(bda=2,2'-bipyrdine-6,6'-dicarbonoxyl acid)and aliphatic chain decorated electrode surfaces,forming lipid bilayer membrane(LBM)-like *** Ru(bda)catalysts on electrode-supported LBM films demonstrated remarkable water oxidation performance with different O-O formation ***,compared to the slow charge transfer process,the O-O formation pathways did not determine the PEC water oxidation efficiency of the dyesensitized photoanodes,and the different reaction rates for similar catalysts with different catalytic paths did not determine the PEC performance of the ***,charge transfer plays a decisive role in the PEC water oxidation *** an indolo[3,2-b]carbazole derivative was introduced between the Ru(bda)catalysts and aliphatic chain-modified photosensitizer in LBM films,serving as a charge transfer mediator for the tyrosine-histidine pair in PSⅡ,the PEC water oxidation performance of the corresponding photoanodes was dramatically enhanced.

关键词： Water oxidation Rate determine step Dye-sensitized photoelectrochemical cell Charge transfer Artificial photosynthesis

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

The Turbulent Schmidt Number for Transient Contaminant Dispersion in a Large Ventilated Room Using a Realizable k-εModel

引用

Fluid Dynamics & Materials Processing 2024年第4期20卷 829-846页

作者： Fei Wang Qinpeng meng Jinchi zhao Xin Wang Yuhong Liu Qianru Zhang School of Environment and Architecture University of Shanghai for Science and TechnologyShanghai200093China

Buildings with large open spaces in which chemicals are handled are often exposed to the risk of *** fluid dynamics is a useful and convenient way to investigate contaminant dispersion in such large *** turbulent Schmidt number(Sc_(t))concept has typically been used in this regard,and most studies have adopted a default *** studied the concentration distribution for sulfur hexafluoride(SF_(6))assuming different emission rates and considering the effect of Sc_(t).Then we examined the same problem for a light gas by assuming hydrogen gas(H_(2))as the *** SF_(6) was considered as the contaminant gas,a variation in the emission rate completely changed the concentration *** the emission rate was low,the gravitational effect did not take *** both low and high emission rates,an increase in S_(ct) accelerated the transport rate of SF_(6).In contrast,for H_(2) as the contaminant gas,a larger S_(ct) could induce a decrease in the H_(2) transport rate.

关键词： Large space CFD turbulent Schmidt number contaminant dispersion emission rate

来源：

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

Observation of regular pulse train in a narrow-band optoelectronic oscillator

引用

Optoelectronics Letters 2024年第2期20卷 94-99页

作者： zhao Chunbo TUO Zhuoyue YAO Jiali HE Yuling ZHAI Shenghua meng Yansong China Academy of Space Technology(Xi’an) Xi’an 710000China National Key Laboratory of Science and Technology on Space Microwave Xi’an 710000China1

We have experimentally observed a new operating state of a regular pulse train in a narrow-band optoelectronic oscillator(OEO) system, where the direct-current(DC) bias of the Mach-Zehnder modulator is set at the maximum value of the transmission transfer function instead of the usual quadrature point. The observed quasi-steady-state pulse train is distinctly periodic, with a period of 10.5 μs and a center frequency of 10 GHz, and resembles a mode-locked OEO in its waveform. The formation of regular pulses here may arise from the dynamic balance of nonlinearity and narrow-band filter effects, with the transient characteristics of the pulses arising mainly from instabilities between the gain and cavity loss. Our results are of great importance for deepening the understanding of the nonlinear dynamical processes in OEO systems.

关键词： optoelectronic pulse modulator

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Transcatheter Closure of Postoperative Residual Atrial or Ventricular Septal Shunts in Patients with Congenital Heart Disease

引用

Congenital Heart Disease 2024年第3期19卷 293-303页

作者： Jiawang Xiao Jianming Wang Zhongchao Wang Lili meng Ming zhao Qiguang Wang Department of Congenital Heart Disease General Hospital of Northern Theater CommandShenyang110016China

Background:Transcatheter closure(TCC)has emerged as the preferred treatment for selected congenital heart disease(CHD).While TCC offers benefits for patients with postoperative residual shunts,understanding its mid-and long-term efficacy and safety remains ***:This study aims to assess the mid-and long-term safety and efficacy of TCC for patients with residual atrial or ventricular septal shunts following CHD ***:In this consecutive retrospective study,we enrolled 35 patients with residual shunt who underwent TCC or surgical repair of CHD between June 2011 to October *** candidacy was determined based on established *** and electrocardiogram were conducted during the perioperative period and continued as part of long-term ***:Among the patients,5(14.3%)exhibited interatrial shunt-ing,while 30(85.7%)had interventricular *** was successfully implemented in 33 of 35 patients,with exceptions in two cases of post-ventricular septal defect repair due to anatomical challenges involving the shape and aortic *** resulted in a TCC success rate of 94.3%.Trace residual shunt was detected in two interventricular shunting cases and a mild residual shunt in one interventricular shunting case;all resolved by the three-month follow-up after *** complications included one hematoma at the puncture site and one transient junctional rhythm during the perioperative *** a median follow-up of 73 months,there were no instances of residual shunt,device embolization,occluder displacement,valve insufficiency,malignant arrhythmia,infective endocarditis,death,or other serious ***:TCC is an effective and safe therapy for patients with residual atrial or ventricular septal shunts following CHD *** support the consideration of TCC as the preferred treatment option for appropriate patient populations.

关键词： Congenital heart disease residual shunt transcatheter closure surgical repair

来源：

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

Iterative Signal Detection Based Soft Interference Cancellation for Satellite-Terrestrial Downlink NOMA Systems

引用

China Communications 2024年第8期21卷 249-263页

作者： Sun meng Zhang Qi Yao Haipeng Gao Ran Xin Xiangjun Tian Feng Feng Weiying Chen dong School of Electronic Engineering Beijing University of Posts and Telecommunications(BUPT)Beijing 100876China Beijing Key Laboratory of Space-Ground Interconnection and Convergence State Key Laboratory of Information Photonics and Optical CommunicationsSchool of Electronic EngineeringBeijing University of Posts and Telecommunications(BUPT)Beijing 100876China School of Information and Communication Engineering Beijing University of Posts and Telecommunications(BUPT)Beijing 100876China Beijing Institute of Technology Beijing 100081China Beihang University Beijing 100191China China Academy of Space Technology(CAST) Beijing 100094China

To improve the bit error rate(BER)performance of multi-user signal detection in satelliteterrestrial downlink non-orthogonal multiple access(NOMA)systems,an iterative signal detection algorithm based on soft interference cancellation with optimal power allocation is *** that power allocation has a significant impact on BER performance,the optimal power allocation is obtained by minimizing the average BER of NOMA *** to the allocated powers,successive interference cancellation(SIC)between NOMA users is performed in descending power *** each user,an iterative soft interference cancellation is performed,and soft symbol probabilities are calculated for soft *** improve detection accuracy and without increasing the complexity,the aforementioned algorithm is optimized by adding minimum mean square error(MMSE)signal estimation before detection,and in each iteration soft symbol probabilities are utilized for soft-decision of the current user and also for the update of soft interference of the previous *** results illustrate that the optimized algorithm ***-IDBSIC significantly outperforms joint multi-user detection and SIC detection by 7.57dB and 8.03dB in terms of BER performance.

关键词： non-orthogonal multiple access(NOMA) resource allocation satellite-terrestrial communication signal detection soft interference cancellation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Programming Supramolecular Hydrogels by Constructing a Multibranch Selection Structure

引用

CCS Chemistry 2024年第8期6卷 1951-1964页

作者： Zhongrui Wang Ting zhao Shenghao Yang Yuwen meng Xu Wang National Engineering Research Center for Colloidal Materials School of Chemistry and Chemical EngineeringShandong UniversityJinanShandong 250100 Key Laboratory of Colloid and Interface Chemistry of the Ministry of Education School of Chemistry and Chemical EngineeringShandong UniversityJinanShandong 250100

Developing chemical systems capable of executing multipath nonequilibrium processes provides valuable insights into the study of multistage dissipative structures in living ***,we report a nonequilibrium multipath evolution in a three-state supramolecular system,which is clarified by associating it with a multibranch selection *** system is constructed by synergistically combining an assembly-induced sol-gel transition with the color change of an acid-base *** on the initial condition and chemical fuel composition,this system can execute five distinct nonequilibrium *** addition,the set of structured programming can be replayed by repeatedly introducing the chemical *** is further utilized to explore the applications of information encryption and establish its *** findings offer novel avenues for future transient material design and may make significant contributions to systems chemistry.

关键词： supramolecular hydrogels nonequilibrium processes programmable self-assembly chemical fuels multibranch selection structure

来源：

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

CRB:A new rumor blocking algorithm in online social networks based on competitive spreading model and influence maximization

引用

Chinese Physics B 2024年第8期33卷 588-604页

作者：董晨徐桂琼孟蕾 School of Management Shanghai UniversityShanghai 200444China

The virtuality and openness of online social platforms make networks a hotbed for the rapid propagation of various *** order to block the outbreak of rumor,one of the most effective containment measures is spreading positive information to counterbalance the diffusion of *** spreading mechanism of rumors and effective suppression strategies are significant and challenging research ***,in order to simulate the dissemination of multiple types of information,we propose a competitive linear threshold model with state transition(CLTST)to describe the spreading process of rumor and anti-rumor in the same ***,we put forward a community-based rumor blocking(CRB)algorithm based on influence maximization theory in social *** crucial step is to identify a set of influential seeds that propagate anti-rumor information to other nodes,which includes community detection,selection of candidate anti-rumor seeds and generation of anti-rumor seed *** the CLTST model,the CRB algorithm has been compared with six state-of-the-art algorithms on nine online social networks to verify the *** results show that the proposed model can better reflect the process of rumor propagation,and review the propagation mechanism of rumor and anti-rumor in online social ***,the proposed CRB algorithm has better performance in weakening the rumor dissemination ability,which can select anti-rumor seeds in networks more accurately and achieve better performance in influence spread,sensitivity analysis,seeds distribution and running time.

关键词： online social networks rumor blocking competitive linear threshold model influence maximization

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：