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Development and Application of a High-Volume Recycled Powder Solidifying Material for Waterworks Sludge

Journal of Renewable Materials 2022年第4期10卷 939-953页

作者： Xiang Deng Sudong Hua Fan Xia Yanfang Zhang Dapeng Guo Xinxing Zhu Defei Zhu College of Materials Science and Engineering Nanjing Tech UniversityNanjing211816China China Construction Installation group Nanjing Construction Co. Ltd.Nanjing210023China Nanjing Pukou Urban and Rural Construction group Co. Ltd.Nanjing211800China

Recycled powder(RP)is produced as a by-product during the process of recycling construction and demolition(C&D)wastes,presenting a low additional *** RP-based solidifying material can not only improve its utilization efficiency,but also reduce the cost of commercial solidifying *** date,this is the best solidifying material utilized to dispose the original waterworks sludge(OWS)with high moisture contents(60%),and the product could be used to fabricate non-fired *** has become a new environment-friendly technology of“using waste to treat waste”.In this paper,the influence of different particle sizes and dosages of RP on the prepared solidifying material was ***,unconfined compression strength(UCS),volume stability,chemical composition,and heat of hydration,pore structure of the solidifying material were ***,non-fired bricks were prepared by using the solidifying material,recycled aggregate,and original waterworks *** UCS and softing coefficient(SC)of the non-fired bricks were *** a result,the 28-day UCS of the solidifying material with optimal(M30)was 35.40 MPa,which could reach 84.37%of Portland cement(PC).The addition of RP increased the volume stability of the solidifying *** addition of a large amount of RP reduced the heat flux and cumulative heat release of the solidifying material,while its porosity *** UCS of non-fired brick(NF20)in 28 days was 15.19 MPa and the SC after 28 days was 78.35%.In conclusion,the preparation of solidifying material using RP could be a promising approach and has a great potential in disposal of original waterworks sludge.

关键词： Recycled powder solidifying material original waterworks sludge non-fired brick unconfined compressive strength

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Preparation and characterization of layered low-voltage ZnO varistors

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Journal of Semiconductors 2009年第3期30卷 19-22页

作者：王立惠甘国友孙加林严继康 Faculty of Materials and Metallurgical Engineering Kunming University of Science and Technology China Nonferrous Metal Mining(group) Co. Ltd.

Double-layered, low-voltage ZnO varistors have been fabricated by feeding two kinds of ZnO powders into a die using dry extrusion molding. Compared with ZnO varistors fabricated by the conventional route, the layered ZnO varistors have larger non-linear coefficients, lower breakdown electric fields, and lower leakage current densities. The improvement in electrical performance of the layered low-voltage ZnO varistors is attributed to the asymmetric band structure at grain boundary between the two layers.

关键词： layered ZnO varistor non-linearity electrical properties

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Thermal fatigue behavior of K125L superalloy

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Rare Metals 2016年第2期35卷 172-176页

作者： Li-Kui Ning Zhi Zheng Feng-Quan An Song Tang Jian Tong Hui-Si Ji Hui-Wen Yu Institute of Metal Research Chinese Academy of Sciences Material Preparation Company Northern Heavy Industries Group Co. Ltd.

The thermal fatigue behavior of K125 L superalloy at the peak temperature of 1,050 °C was investigated by optical microscope（OM）, X-ray diffraction（XRD）, and scanning electron microscope（SEM）. The experimental results show that the crack initiation sites of tested alloys are at the V-notch tip and the V-notch tip propagates by way of continuous cracking along grain boundaries. The formation of high-temperature oxides and MC carbides accelerates the crack propagation, and no secondary carbides precipitate out. Oxides between cracks are mainly the Al2O3 as well as Cr_2O_3, and carbides are Ta-rich and Tirich MC carbides.

关键词： K125L superalloy Thermal fatigue High temperature oxidation Carbides

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A new gain-of-function OsGS2/GRF4 allele generated by CRISPR/Cas9 genome editing increases rice grain size and yield

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The Crop Journal 2022年第4期10卷 1207-1212页

作者： Wenshu Wang Weipeng Wang Yanlin Pan Chao Tan Hongjing Li Ya Chen Xingdan Liu Jing Wei Nian Xu Yu Han Han Gu Rongjian Ye Qi Ding Chonglie Ma Life Science and Technology Center China National Seed Group Co.Ltd.Wuhan 430000HubeiChina State Key Laboratory of Crop Breeding Technology Innovation and Integration China National Seed Group Co.Ltd.Wuhan 430000HubeiChina

Grain size is one of the most important factors affecting rice grain quality and yield,and attracts great attention from molecular biologists and *** this study,we engineered a CRISPR/Cas9 system targeting the miR396 recognition site of the rice GS2 gene,which encodes growth-regulating factor 4(OsGRF4)and regulates multiple agronomic traits including grain size,grain quality,nitrogen use efficiency,abiotic stress response,and seed *** contrast to most previous genome editing efforts in which indel mutations were chosen to obtain null mutants,a mutant named GS2^(E) carrying an in-frame 6-bp deletion and 1-bp substitution within the miR396-targeted sequence was ***2^(E) plants showed increased expression of GS2 in consistent with impaired repression by *** expected,the gain-of-function GS2^(E) mutant exhibited multiple beneficial traits including increased grain size and yield and bigger grain length/width *** grain weight and grain yield per plant of GS2^(E) plants were increased by 23.5%and 10.4%,*** improved traits were passed to hybrids in a semidominant way,suggesting that the new GS2^(E) allele has great potential in rice *** together,we report new GS2 germplasm and describe a novel gene-editing strategy that can be widely employed to improve grain size and yield in *** trait-improvement strategy could be applied to other genes containing miRNA target sites,in particular the conserved miR396-GRF/GIF module that governs plant growth,development and environmental response.

关键词： Genome editing GS2/GRF4 Grain size Yield Rice

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Cyber Development of Government Service Platform in Social Public Administration

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学术界 2016年第2期 303-307页

作者： Niu Gang Luoyang City Development Investment group Co. Ltd.

The cyber development of government service platform is just to integrate all the superiorities of the government to strengthen its roles such as service,performance and function to drive the social development ***,the social public administration will take this opportunity to optimize the cyber information service platform to make the civic administration oriented to the social development to maximize its functions of organization,coordination and service to protrude the ascendancy of the web era so as to lay a solid foundation for the leap development of the public administration.

关键词：信息服务平台网络化发展社会发展公共管理政府跨越式发展优化网络城市管理

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Research on the maceral characteristics of Shenhua coal and efficient and directional direct coal liquefaction technology

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International Journal of Coal Science & Technology 2014年第1期1卷 46-55页

作者： Geping Shu Yuzhuo Zhang Shenhua group Co. Ltd.Beijing 100011China

In this research,molecular structure models were developed respectively for Shenhua coal vitrinite concentrates(SDV)and inertinite concentrates(SDI),on the basis of information on constitutional unit of Shenhau coal and elemental analysis results obtained from^(13)C-NMR analysis characterization,FTIR analysis characterization,X-ray diffraction XRD and XPS analysis *** can be observed from characterization data and molecular structure models that the structure of SDV and SDI is dominated by aromatic hydrocarbon,with aromaticity of SDI higher than that of SDV;SDV mainly consists of small molecule basic structure unit,while SDI is largely made from macromolecular structure *** on bond-level parameters of the molecular model,the research found through the autoclave experiment that vitrinite liquefaction process goes under thermodynamics control and inertinite liquefaction process under dynamics *** research developed an efficient directional direct coal liquefaction technology based on the maceral characteristics of Shenhua coal,which can effectively improve oil yield and lower gas yield.

关键词： Liquefaction Maceral Molecular model Shenhua coal Directional direct coal liquefaction

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structure of V_2O_5-P_2O_5-Sb_2O_3-Bi_2O_3 glass

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International Journal of Minerals,Metallurgy and Materials 2012年第7期19卷 628-635页

作者： Hong-yan Li Zhi-liang Zhu Feng-li Yang Wei-dong Zhuang Yun-sheng Hu Xiao-fan Wen National Engineering Research Center for Rare Earth Materials General Research Institute for Nonferrous Metals and Grirem Advanced Materials Co. Ltd. Beijing 100088 China BOE Technology group Co. Ltd. Beijing 100015 China Beijing Asahi Glass Electronics Co. Ltd. Beijing 100015 China

The structure ofV2O5-P2O5-Sb2O3-Bi2O3glass and its state of crystallization were studied by means of infrared spectroscopy and X-ray diffraction analysis. The results indicate that, in this glass, V and P exist mainly in the form of a single-stranded linear （VO3）n and an isolated （PO4） tetrahedral with no double bond. Partial V and P are connected through O, forming an amorphous structure of layered vana- dium phosphate. Trivalent Sb3＋ and Bi3＋ open the V=O bond and appear in interlayers, so a weak three-dimensional structure is connected successfully. Along with the substitution of Sb203 for partial V205 or that of P205 for partial V205, the network structure of the glass is rein- forced, and the crystallization is reduced.

关键词： glass structure sealing vanadium pentoxide phosphorus pentoxide antimonous oxide bismuth trioxide

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Compressive Sensing Inverse Synthetic Aperture Radar Imaging Based on Gini Index Regularization

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International Journal of Automation and computing 2014年第4期11卷 441-448页

作者： Can Feng Liang Xiao Zhi-Hui Wei School of Computer Science and Engineering Nanjing University of Science & Technology North Information Control group Co. Ltd.

In compressive sensing(CS) based inverse synthetic aperture radar(ISAR) imaging approaches, the quality of final image significantly depends on the number of measurements and the noise level. In this paper, we propose an improved version of CSbased method for inverse synthetic aperture radar(ISAR) imaging. Different from the traditional l1 norm based CS ISAR imaging method, our method explores the use of Gini index to measure the sparsity of ISAR images to improve the imaging quality. Instead of simultaneous perturbation stochastic approximation(SPSA), we use weighted l1 norm as the surrogate functional and successfully develop an iteratively re-weighted algorithm to reconstruct ISAR images from compressed echo samples. Experimental results show that our approach significantly reduces the number of measurements needed for exact reconstruction and effectively suppresses the noise. Both the peak sidelobe ratio(PSLR) and the reconstruction relative error(RE) indicate that the proposed method outperforms the l1 norm based method.

关键词： Compressive sensing inverse synthetic aperture radar (ISAR) imaging sparsity Gini index regularization

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Fatigue crack growth behavior of 2624-T39 aluminum alloy with different grain sizes

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Rare Metals 2021年第9期40卷 2523-2529页

作者： Guan Huang Zhi-Hui Li Li-Ming Sun Xi-Wu Li Kai Wen Li-Zhen Yan Bai-Qing Xiong Yong-An Zhang State Key Laboratory of Nonferrous Metals and Processes GRINM Group Co.Ltd.Beijing 100088China GRIMAT Engineering Institute Co. Ltd.Beijing 101407China General Research Institute for Nonferrous Metals Beijing 100088China Northeast Light Alloy Co. Ltd.Harbin 150060China

The microstructure of 2624-T39 aluminum alloy was analyzed by means of metallographic(OM), scanning electron microscope(SEM) and transmission electron microscope(TEM). The effects of different microstructure characteristics on the tensile properties and fatigue crack growth rate of 2624-T39 aluminum alloy were *** showed that the grain size of the alloy was a typical fiber structure along the rolling direction, and the main second phase was the A_(l2)CuMg phase. The grain size of the alloy had an obvious influence on the fatigue crack growth rate, and the alloy showed a lower fatigue crack growth rate due to the larger grain size. The crack initiation zone on the fracture surface of alloys with lower fatigue crack growth rate was relatively rough, the crack propagation zone had obvious fatigue striations, and the transient fracture zone had a large number of smaller dimples.

关键词： 2624-T39 aluminum alloy Grain size Fatigue crack growth rate Fatigue fracture morphology

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Fabricating functionally graded Fe-Cr-Co permanent magnetic alloys via laser powder bed fusion

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Journal of Iron and Steel Research International 2024年第3期31卷 729-737页

作者： Ya-zhou He Ya-qing Hou Peng Shen Hao Zhang Dong Zhou Hang Su Central Iron and Steel Research Institute Co. Ltd.Beijing 100081China Material Digital R&D Center China Iron and Steel Research Institute Group Co.Ltd.Beijing 100081China

Laser powder bed fusion(LPBF)in-situ alloying technology offers the possibility to construct gradient materials with varied structures and *** graded Fe-Cr-Co permanent magnetic alloys were fabricated by LPBF and in-situ alloying mixed powders of Fe,Cr,and Co *** effects of different Fe,Cr and Co contents on the microstructure,magnetic properties and hardness of Fe-Cr-Co alloys prepared by LPBF were *** as-built Fe-Cr-Co alloys present a single body-centered-cubic phase and have a homogeneous distribution of *** mechanical properties and magnetic properties of the compositionally graded sample show a gradient *** the increase in Cr content,the Vickers hardness of the sample increases,and the saturation magnetization of the sample *** optimal magnetic properties in an isotropic state are given as coercivity HcB=21.65 kA/m,remanence Br=0.70 T and energy product(BH)_(max)=5.35 kJ/m^(3),which are comparable to or higher than the reported magnetic properties in an isotropic state prepared by traditional powder *** in-situ alloying technology has the potential to further explore Fe-Cr-Co magnetic materials,such as those consisting of multiple or more constituent elements,and to maximize the compositional flexibility of magnetic materials.

关键词： Fe-Cr-Co alloy Laser powder bed fusion In-situ alloying Functional material Magnetic property

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