检索结果-南通市图书馆

采用骨料架构-固化技术对开挖淤泥加固试验研究

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

土木与环境工程学报（中英文） 2025年第1期47卷 100-109页

作者：邵吉成袁波白银银骆嘉成浙江华坤地质发展有限公司浙江温州325006 温州市地质资源与生态环境重点实验室浙江温州325006 浙江省第十一地质大队浙江温州325006 温州市渣土利用开发股份有限公司浙江温州325700

为了对淤泥和建筑垃圾进行处置,实现二者的共同资源化利用,在室内和现场分别对淤泥进行固化试验。将建筑垃圾作为骨料按淤泥质量比的15%添加到淤泥中,再向淤泥中加入淤泥固化剂,通过机械搅拌的方式将淤泥与建筑垃圾、固化剂混合均匀,然... 详细信息

为了对淤泥和建筑垃圾进行处置,实现二者的共同资源化利用,在室内和现场分别对淤泥进行固化试验。将建筑垃圾作为骨料按淤泥质量比的15%添加到淤泥中,再向淤泥中加入淤泥固化剂,通过机械搅拌的方式将淤泥与建筑垃圾、固化剂混合均匀,然后对固化土进行养护。室内试验结果表明,当固化剂掺量为8%时,固化淤泥土强度较高,养护28 d后,室内无侧限抗压强度可达320 kPa;在现场试验中,静力触探试验和平板荷载试验表明,固化剂对淤泥的固化效果明显。将低剂量固化剂添加到淤泥中,固化淤泥土强度较低,骨料的架构作用不明显;当固化剂掺量为8%时,固化土的强度较高,骨料的架构作用有利于提升固化淤泥土的承载力,土体的承载力特征值可达325kPa,架构作用对固化淤泥土强度的提升率为71.05%,可实现淤泥和建筑垃圾的同步资源化利用。

关键词：淤泥固化骨料资源化利用架构作用承载力

维普期刊数据库博看期刊

Joint User Selection and Rate Adaptation Scheme in a Coordinated Multipoint Transmission System for Power Minimization

在线全文

学校读者我要写书评

暂无评论

Tsinghua Science and Technology 2015年第6期20卷 574-582页

作者： Dong Wang bo bai Wei Chen Department of Electronic Engineering Tsinghua University New Star Research Institute of Applied Technology

In a coordinated multipoint transmission system with centralized architecture for saving power consumption, total power metric is minimized while completely using the backhaul capacity and maintaining the minimum target data rate. The problem is formulated as a mixed integer optimization problem, which is difficult to solve. To overcome this problem, a joint user selection and rate adaptation scheme is developed based on the water-filling rate adaptation with the given user set and the power saving criterion with the allocated *** results demonstrate that compared with the norm-based and semi-orthogonal user selection algorithms,the proposed algorithm can significantly reduce the total power consumption. The proposed algorithm can also achieve near-optimal performance compared with the performance achieved by the exhaustive search-based method. In addition, the computational complexity of the proposed algorithm is reduced by heuristic iteration and search scope shrinking.

关键词： coordinated multipoint transmission user selection

Magnesium hydroxide whisker modified via in situ copolymerization of n-butyl acrylate and maleic anhydride

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2017年第12期36卷 997-1002页

作者： Yu-Zhi jiang Yu-Lian Wang Chun-Yan Wang Li-Mei bai Xin Li Yan-bo Li Collogy of Materials Science and Engineering Shenyang Ligong University Shenyang 110159 China Kailong Lanfeng New Material Technology Co. LtdZhenjiang 212132 China College of Mining Engineering Hebei United UniversityTangshan 063009 China School of Materials Science and Engineering Central South University Changsha 410083 China

Magnesium hydroxide(MH) whiskers were modified via in situ polymerization of n-butyl acrylate and maleic anhydride. Sodium dodecyl sulfonate was used as emulsifier. The modifying effect was evaluated by using contact angle and activation index. The thermal stability,functional groups, structure, morphology, phase composition and surface element valence of MH whiskers were characterized by thermogravimetry-differential scanning calorimetry(TG-DSC), Fourier transform infrared spectroscopy(FTIR), X-ray diffraction(XRD), scanning electron microscopy(SEM) and X-ray photoelectron spectroscopy(XPS). Results reveal that the contact angle and activation index of modified MH whiskers are 105°and 76.5%, the thermal stability shows little change, and the decomposition temperature ranges between 38 and419 ℃. The copolymer of n-butyl acrylate and maleic anhydride absorbed on the surface of MH whiskers leads to the increased diameter and makes the surface of whiskers be rougher. Furthermore, the absorption of element C on the surface of MH whiskers increases, and the diffraction intensity of C 1 s spectra increases; thus, the compatibility of whiskers in the organic phase can be improved significantly. Lastly, the surface molecular model of MH whiskers modified via in situ copolymerization of n-butyl acrylate and maleic anhydride is established.

关键词： Magnesium hydroxide whiskers n-Butyl acrylate Maleic anhydride In situ copolymerization Surface molecular model

Flexible and densified graphene/waterborne polyurethane composite film with thermal conducting property for high performance electromagnetic interference shielding

在线全文

学校读者我要写书评

暂无评论

Nano Research 2022年第11期15卷 9926-9935页

作者： Wang Yang Hengxuan bai bo jiang Chaonan Wang Weimin Ye Zhengxuan Li Chong Xu Xiaobai Wang Yongfeng Li State Key Laboratory of Heavy Oil Processing China University of PetroleumBeijing 102249China Department of Materials Application Research AVIC Manufacturing Technology InstituteBeijing 100024China

High-performance electromagnetic interference(EMI)shielding materials with flexibility,excellent mechanical property,and thermal conductivity are highly desired for fifth-generation communications *** exhibits tremendous potential due to its high electrical conductivity and unique lamellar ***,the construction of densified graphene structure in polymer matrix is still ***,we develop a graphene/waterborne polyurethane(G/WPU)flexible film with densified and ordered layer-structure for using as an EMI shielding *** virtue of the polyvinylpyrrolidone modified strategy and facile liquid phase ball-milling treatment,the graphene nanosheets can be efficiently dispersed into the WPU substrate and tightly connected between each other via internal *** from the relatively low defects and densified structure of graphene,the resultant G/WPU film yields a high electrical conductivity of 1,004.5 S/m,and a tensile strength of around 48.5 *** a consequence,it achieves an average EMI shielding effectiveness of over 30 dB in the X-band with a thickness of merely 0.15 mm and the value is further enhanced to 73.4 dB at 0.9 mm with a low density of 1.4 g/cm^(3),offering over 99.99999%shielding of incident electromagnetic *** importantly,this G/WPU film also exhibits a high cross-plane thermal conductivity of about 1.13 W/(m·K).Thus,this work develops a high-performance EMI shielding material with both good capacity of heat transmission,but also provides a facile strategy for designing next-generation advanced,lightweight,flexible,and multifunction shielding materials.

关键词： electromagnetic interference shielding graphene densification flexible thermal conductivity

Invited Paper: Antenna Selection in Energy Efficient MIMO Systems: A Survey

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 2015年第9期12卷 162-173页

作者： Zhou Xingyu bai bo Chen Wei State Key Laboratory on Microwave and Digital CommunicationsTsinghua National Laboratory for Information Science and Technology (TNList)Department of Electronic Engineering Tsinghua University

With the explosive growth and need for high-speed wireless communications, more and more energy is consumed to support the required quality of service. Therefore, energy efficient or green communication has become a very hot topic under the ground of limited energy resource and environmentally friendly transmission schemes. MIMO technique is capable of reducing the transmission power thanks to its diversity and multiplexing gain. Moreover, antenna selection(AS) is an alternative to extract many of the benefits in MIMO systems with a reduced cost of complexity and power. Although many works including several survey papers have investigated AS in MIMO systems, the goal of these works is only the capacity maximization or error rate minimization, which fails to guarantee the optimality of the energy efficiency in MIMO systems. In this paper, we overview the state of the art in the AS schemes in energy efficient MIMO systems, the goal of which is to optimize the energy efficiency of the whole system. Specifically, we introduce energy efficient AS in point-to-point MIMO, cooperative MIMO, multiuser MIMO and largescale MIMO systems, respectively. Several challenging and practical issues in this area are also addressed.

关键词： antenna selection energy efficient holistic power model MIMO

Multiscale structure and interface engineering of Fe/Fe_(3)C in situ encapsulated in nitrogen-doped carbon for stable and efficient multi-band electromagnetic wave absorption

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2023年第27期158卷 9-20页

作者： bo jiang Wang Yang Hengxuan bai Chen Zhang Siyuan Li Shaoxiong Du Ye Wang Li Sun Xiaobai Wang Yongfeng Li State Key Laboratory of Heavy Oil Processing China University of Petroleum(Beijing)Changping 102249China Department of Materials Application Research AVIC Manufacturing Technology InstituteBeijing 100024China

Most reported electromagnetic wave absorption(EWA)materials show significant effective absorption in a certain frequency range,but their performances deteriorate dramatically as the frequency *** the range of working frequencies for electronic devices is gradually widening,it is of great interest to explore frequency-insensitive EWA materials that can achieve efficient absorption in every waveband by simply changing the absorption *** this end,a multi-scale absorber(Fe/Fe_(3) C@NC)is rationally synthesized by chemical foaming and in-situ growth *** controlling the growth of carbon nan-otubes,the Fe/Fe_(3) C@NC-2 exhibits a well-constructed 3D multi-scale *** to dipole po-larization,interface polarization and magnetic-dielectric energy conversion,the Fe/Fe_(3) C@NC-2 overcomes the frequency dispersion behavior and keeps a stable dielectric attenuation capability across the entire frequency ***,it delivers a superb full-band absorption of-50.1,-59.83,-55.87 and-51.91 dB in the S,C,X and Ku bands,*** maximum radar cross-sectional reduction reaches 35.44 dB m^(-2) when the incidentθis 20°,testifying its impressive ***,this EWA material also shows a remarkable resistance to oxidation and corrosion derived from the tightly coated carbon *** work provides new insight into the design of multi-band and stable EWA materials for practical application.

关键词： Multi-scale structure Heterogeneous interface Multiple bands Magnetic-dielectric composites Electromagnetic waves absorption

Multiplex genome editing targeting soybean with ultra-low anti-nutritive oligosaccharides

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

The Crop Journal 2023年第3期11卷 825-831页

作者： Wenxin Lin Huaqin Kuang Mengyan bai Xiaomeng jiang Pengfei Zhou Yinghua Li bo Chen Huarong Li Yuefeng Guan College of Resources and Environment Fujian Agriculture and Forestry UniversityFuzhou 350002FujianChina Guangdong Provincial Key Laboratory of Plant Adaptation and Molecular Design Guangzhou Key Laboratory of Crop Gene EditingInnovative Center of Molecular Genetics and EvolutionSchool of Life SciencesGuangzhou UniversityGuangzhou 510006GuangdongChina FAFU-UCR Joint Center for Horticultural Biology and Metabolomics Fujian Agriculture and Forestry UniversityFuzhou 350002FujianChina College of Life Sciences Fujian Agriculture and Forestry UniversityFuzhou 350002FujianChina Bioinformatics Department School of Life Sciences and TechnologyTongji UniversityShanghai 200092China KingAgroot CropScience Co. Ltd.Qingdao 266500ShandongChina

Soybean is the primary source of plant protein for *** to the indigestibility of the raffinose family of oligosaccharides(RFO),raffinose and stachyose are considered anti-nutritive factors in soybean ***-RFO soybean cultivars are generated by mutagenesis of RFO biosynthesis genes,but the carbohydrate profiles invite further modification to lower *** study employed a pooled multiplex genome editing approach to target four seed-specifically expressed genes mediating RFO biosynthesis,encoding three raffinose synthases(RS2,RS3,and RS4)and one stachyose *** T1progeny,rs2/rs3 and rs4/sts homozygous double mutants and a rs2/rs3/rs4/sts quadruple mutant(rfo-4m)were *** rs2/rs3 mutant showed reduced raffinose and stachyose contents,but the rs4/sts mutant showed only reduced stachyose in *** RFO contents in the rfo-4m mutant were almost *** analysis showed that the mutation of four RFO biosynthesis genes led to a shift of metabolic profile in the seeds,including the accumulation of several oligosaccharides-related *** mutants could contribute to precision breeding of soybean cultivars for soy food production.

关键词： Soybean Genome editing Raffinose family of oligosaccharides Raffinose Stachyose Precision breeding

Microscopic and Fractal Characterization of Organic Matter within Lacustrine Shale Reservoirs in the First Member of Cretaceous Qingshankou Formation,Songliao Basin,Northeast China

在线全文

学校读者我要写书评

暂无评论

Journal of Earth Science 2020年第6期31卷 1241-1250页

作者： bo Liu Meng Yan Xianda Sun Yunfeng bai Longhui bai Xiaofei Fu Key Laboratory of Continental Shale Hydrocarbon Accumulation and Efficient Development Ministry of EducationNortheast Petroleum UniversityDaqing 163711China State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Chengdu University of TechnologyChengdu 610051China PetroChina Daqing Oilfield Company Daqing 163318China

Understanding the occurrences of different fractions of organic matter in shale reservoirs is very important for the evaluation of shale *** organic-rich shale samples from the first member of the Cretaceous Qingshankou Formation in the Songliao Basin were analyzed with confocal laser scanning microscopy(CLSM)and fluorescence spectral *** results show that the occurrences of different organic components are related to the fabric of samples and vary with *** bulk content of light components is significantly higher than heavy components and exhibits a positive relationship with quartz and feldspar *** light and heavy components are distributed parallel with the lamination in microscopic view in laminated samples,and randomly in massive *** maximum radius of light components in most of the samples is larger than 20μm,while it is smaller for heavy components,indicating the micro fractionation from clay/organic lamina to quartz/feldspar *** depth of enrichment of light components corresponds to the oil maturity of organic *** the distribution of light and heavy components fits the same fractal model,with fractal dimensions ranging between 2.2 and *** CLSM results confirm that it can be a reliable tool for the"sweet spot"exploration.

关键词： confocal laser scanning fractal bitumen lithofacies shale oil

The root microbiome:Community assembly and its contributions to plant fitness

在线全文

学校读者我要写书评

暂无评论

Journal of Integrative Plant Biology 2022年第2期64卷 230-243页

作者： bo bai Weidong Liu Xingyu Qiu Jie Zhang Jingying Zhang Yang bai State Key Laboratory of Plant Genomics Institute of Genetics and Developmental BiologyInnovation Academy for Seed DesignChinese Academy of SciencesBeijing100101 China Institute of Crop Germplasm Resources Shandong Provincial Key Laboratory of Crop Genetic ImprovementEcology and PhysiologyShandong Academy of Agricultural SciencesJi'nan250100 China CAS Center for Excellence in Biotic Interactions College of Advanced Agricultural SciencesUniversity of Chinese Academy of SciencesBeijing100049 China CAS-JIC Centre of Excellence for Plant and Microbial Science Institute of Genetics and Developmental BiologyChinese Academy of SciencesBeijing100101 China Center for life science Yunnan UniversityYunnan650091 China State Key Laboratory of Plant Genomics Institute of MicrobiologyChinese Academy of SciencesBeijing100101 China

The root microbiome refers to the community of microbes living in association with a plant's roots,and includes mutualists,pathogens,and *** we focus on recent advances in the study of root commensal community which is the major research object of microbiomerelated *** the rapid development of new technologies,plant-commensal interactions can be explored with unprecedented breadth and *** the soil environment and the host plant drive commensal community *** bulk soil is the seed bank of potential commensals,and plants use root exudates and immune responses to build healthy microbial communities from the available *** plant microbiome extends the functional system of plants by participating in a variety of processes,including nutrient absorption,growth promotion,and resistance to biotic and abiotic *** and their microbiomes have evolved adaptation strategies over ***,there is still a huge gap in our understanding of the regulatory mechanisms of plant-commensal *** this review,we summarize recent research on the assembly of root microbial communities and the effects of these communities on plant growth and development,and look at the prospects for promoting sustainable agricultural development through the study of the root microbiome.

关键词： commensal microbiome assembly plant fitness plant-microbe interaction root microbiome