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A novel 1-D purely inorganic chain assembled from the lanthanide-substituted borotungstate units with supporting lanthanide pendants

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A novel 1-D purely inorganic chain assembled from the lantha...

社会分工、成本分摊与农机作业服务产业的出现——以冀豫鲁三省农业机械化发展为例

河南省化学会2016年学术年会

作者： jian cai liu Yu Jing Jun Wei Zhao Henan Key Laboratory of Polyoxometalate Chemistry Institute of Molecular and Crystal Engineering College of Chemistry and Chemical Engineering Henan University

A neoteric borotungstate-based 1-D chain KH[Ce(HO)][Ce(HO)][α-BWO]·14HO(1) under the conventional aqueous conditions and structurally characterized by element analysis,IR spectrum,power X-ray diffraction and single-crystal X-ray *** analysis reveals that 1 crystallizes in the triclinic space group P1 and is composed of a mono-Ln-substituted[Ce(HO)][α-BWO] polyoxoanion with an appended[Ce(HO)] cation on one ***,the l:l-type mono-Ln-substituted{[Ce(HO)][Ce(HO)][α-BWO]} units are combined with each other through W-O-Ln-O-W bridges generating a zigzag chainlike 1-D alignment,which are further connected by K ions giving rise to an intriguing 2-D framework with the-A-A-A- packing mode.

关键词： conventional aqueous system borotungstate 1-D chain

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江西财经大学学报 2017年第4期 83-92页

作者：蔡键刘文勇华南农业大学经济管理学院广州510642 中国农业科学院农业经济与发展研究所北京100081

农机作业服务是中国在机械化进程中探索出来的特殊产业模式。该模式从根本上克服了"农户小规模经营与大马力机械需求"之间的矛盾,从而推动了中国农业机械化的快速发展。基于此,从社会分工角度而言,农机作业服务产业的出现是有其内在的... 详细信息

农机作业服务是中国在机械化进程中探索出来的特殊产业模式。该模式从根本上克服了"农户小规模经营与大马力机械需求"之间的矛盾,从而推动了中国农业机械化的快速发展。基于此,从社会分工角度而言,农机作业服务产业的出现是有其内在的经济原因的。研究表明:第一,在人工成本上升与购机补贴政策的共同推动下,劳动力与机械相对成本越来越高,由此也诱发农民强烈的农机使用需求;第二,受限于小规模经营的资源条件和农业收入水平低下的经济状况,小农一家一户无法负担农机的购置成本;第三,社会分工产生农机作业服务产业,有利于将高昂的农机购置成本在多个农户间进行分担,是解决农机高需求和农户低购买力矛盾的有效途径。

关键词：农业机械需求社会分工成本分摊农机作业服务

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Syntheses, Structures and Properties of A Novel Metal–Organic Complexes based on 2,2'-dipyridyl-5,5'-dicarboxylate ligand

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Syntheses, Structures and Properties of A Novel Metal–Organ...

Molecular Structure Tailoring of Organic Spacers for High‑Performance Ruddlesden–Popper Perovskite Solar Cells

河南省化学会2014年学术年会

作者： jian-cai liu Yan-Zhou Li Li-Juan Chen Jun-Wei Zhao Henan Key Laboratory of Polyoxometalate Chemistry Institute of Molecular and Crystal EngineeringCollege of Chemistry and Chemical Engineering Henan University

The design and synthesis of novel metal–organic frameworks(MOFs)constructed from organic linkers and metal nodes have attracted considerable attention in view of their structural versatility and intriguing crystal pa...

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Nano-Micro Letters 2025年第2期17卷 314-357页

作者： Pengyun liu Xuejin Li Tonghui cai Wei Xing Naitao Yang Hamidreza Arandiyan Zongping Shao Shaobin Wang Shaomin liu School of Materials Science and Engineering State Key Laboratory of Heavy Oil ProcessingChina University of Petroleum(East China)Qingdao 266580People’s Republic of China School of Chemistry and Chemical Engineering Shandong University of TechnologyZibo 255049People’s Republic of China Centre for Applied Materials and Industrial Chemistry(CAMIC) School of ScienceRMIT UniversityMelbourneVic 3000Australia WA School of Mines:Minerals Energy and Chemical Engineering(WASM‑MECE)Curtin UniversityPerthWA 6102Australia School of Chemical Engineering The University of AdelaideAdelaideSA 5005Australia School of Engineering Great Bay UniversityDongguan 523000People’s Republic of China

Layer-structured Ruddlesden–Popper(RP)perovskites(RPPs)with decent stability have captured the imagination of the photovoltaic research community and bring hope for boosting the development of perovskite solar cell(PSC)***,two-dimensional(2D)or quasi-2D RP PSCs are encountered with some challenges of the large exciton binding energy,blocked charge transport and poor film quality,which restrict their photovoltaic ***,these issues can be readily resolved by rationally designing spacer cations of *** review mainly focuses on how to design the molecular structures of organic spacers and aims to endow RPPs with outstanding photovoltaic *** firstly elucidated the important roles of organic spacers in impacting crystallization kinetics,charge transporting ability and stability of *** we brought three aspects to attention for designing organic ***,we presented the specific molecular structure design strategies for organic spacers of RPPs aiming to improve photovoltaic performance of RP *** proposed strategies in this review will provide new avenues to develop novel organic spacers for RPPs and advance the development of RPP photovoltaic technology for future applications.

关键词： Ruddlesden-Popper perovskites Low-dimensional perovskite solar cells Organic spacers Molecular structure Design strategies

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Observation of topological charge transformations in acoustic vortex using passive periodic systems

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 140-147页

作者： Di-Chao Chen Xie liu Changqing Xu Da-jian Wu Ying Cheng Xiao-Jun liu School of Physics and Technology Nanjing Normal University Key Laboratory of Modern Acoustics School of Physics Nanjing University

Vortex transmutation utilizes a periodic system, which not only enables the alteration of the topological charge(TC) of unstable input vortices but also facilitates their transformation into stable structures. This approach is crucial for investigating the characteristics of vortices in various wave systems. Here, we achieve acoustic vortex TC transmutation by employing a welldesigned dual-structured plate external system(DPES). The interactions between the acoustic vortex and the finite-order discrete rotational symmetry lead to the transformation of its topological charge when complete rotational symmetry is broken to Nthorder discrete symmetry. Our results experimentally demonstrate the acoustic vortex TC transmutation based on passive artificial structures, enabling numerous applications in particle manipulation and information multiplexing as well as advancing our understanding and control over free-space acoustic vortices.

关键词： acoustic vortex topological charge transformation artificial structure

Mutual-structure weighted guided image filtering for depth map restoration

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Optoelectronics Letters 2025年第1期21卷 51-56页

作者： liu Zijian SONG jian CHEN Quanmin XU jiangtao Tianjin Key Laboratory of Imaging and Sensing Microelectronic Technology School of Microelectronics Tianjin University Spikesee Technology Co. Ltd.

Although guided image filtering(GIF) is known for preserving edges and fast computation, it may produce inaccurate outputs in depth map restoration. In this paper, a novel confidence-weighted GIF called mutual-structure weighted GIF(MSWGIF) is proposed, which replaces the mean filtering strategy in GIF during handling overlapping windows. The confidence value is composed of a depth term and a mutual-structure term, where the depth term is utilized to protect the edges of the output, and the mutual-structure term helps to select accurate windows during the structure characteristics of the guidance image are transferred to the output. Experimental results show that MSWGIF reduces the root mean square error(RMSE) by an average of 12.37%, and the average growth rate of correlation(CORR) is 0.07% on average. Additionally, the average growth rate of structure similarity index measure(SSIM) is 0.34%.

关键词： Wiener filtering

Preparation and Performance of Ternary Early Strength Agent and Quercetin Composite Cement Sealing Material

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Journal of Wuhan University of Technology(Materials Science) 2025年第1期40卷 130-140页

作者： liu jian CHEN Meiting JI Xiaoli XU Chao WANG Chunmei Department of Safety Science and Engineering Anhui University of Science and TechnologyHuainan 232001China Key Laboratory of Mine Safety and High Efficient Mining Jointly Built by Province and Education Ministry Anhui University of Science and TechnologyHuainan 232001China Department of Chemical Engineering and Explosives Anhui University of Science and TechnologyHuainan 232001China

A ternary early-strengthening agent consisting of calcium formate+triethanolamine+lithium sulfate was compounded with quercetin to shorten the setting time of cementitious materials while ensuring their early *** optimum ratio of the three early-strengthening agents was determined as 0.5%calcium formate+0.04%triethanolamine+0.4%lithium sulfate by response surface *** effects of the ternary early-strengthening agent composed of calcium formate+triethanolamine(TEA)+lithium sulfate on cementitious pore sealing materials under the synergistic effect of quercetin were studied by means of the performance tests of compressive strength,fluidity,and setting time,and the microstructural characterizations of X-ray powder diffractometer(XRD),thermogravimetry(TG-DSC)and scanning electron microscopy(SEM).The study shows that the synergistic effect of ternary early-strengthening agent and quercetin forms a multi-performance composite admixture for cementitious *** best performance was obtained with the compounding scheme of 0.5%calcium formate+0.04%triethanolamine+0.4%lithium sulfate ternary early-strengthening agent and 0.05%*** compressive strength of 1,3,7,and 28 d are 94.8%,39.8%,42%,and 28%higher than those of the blank group,*** initial time and final setting time are 41 and 57 minutes,*** to the microscopic analysis,the network and fibrous C-S-H gels generated by ternary early-strengthening agents are attached to the surface promoted by quercetin,which forms skeleton support while thickening and solidifying the cement slurry,which enhances the early compressive strength of the cement-based materials.

关键词： sealing material ternary early-strengthening agent quercetin synergetic effect response surface methodology

Effects of combination therapy with atenolol and amlodipine on blood pressure control and stroke prevention in stroke-prone spontaneously hypertensive rats

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Acta Pharmacologica Sinica 2007年第11期28卷 1755-1760页

作者： Gang LING,Ai-jun liu,Fu-ming SHEN,Guo-jun cai,jian-guo liu,Ding-feng SU~2Department of Pharmacology,School of Pharmacy Second Military Medical University,Shanghai 200433,China ment of Pharmacology School of Pharmacy Second Military Medical University Shanghai 200433 China. dfsu@***.

Aim:To test the effects of atenolol and amlodipine,either alone or in combination,on blood pressure,blood pressure variability (BPV),baroreflex sensitivity (BRS),and the prevalence of stroke in stroke-prone spontaneously hypertensive rats(SHR-SP).Methods:In the first set of the study,24 8-month-old,female SHR-SPrats were randomly divided into 3 *** pressure,heart period,and BRSwere determined before and after the intragastric administration of atenolol (10mg/kg) and amlodipine (1.0 mg/kg),either alone or in *** the secondset of the study,40 male and 40 female rats were randomly assigned to 1 of thefollowing 4 groups:control,atenolol (10 mg·kg-1·d-1),amlodipine (1.0 mg·kg-1·d-1),and both (10 male and 10 female in each group).The stroke incident and survivaltime were ***:Atenolol and amlodipine,either alone or incombination,significantly decreased blood pressure,with the exception of theamlodipine-induced effect on diastolic blood ***,only the com-bination treatment significantly decreased the BPV levels for the same *** q-values calculated by the probability sum analysis were 1.17 and 2.67 forsystolic and diastolic blood pressure,respectively,and were 2.48 and 2.10 forsystolic and diastolic BPV,respectively,following *** drugexhibited any significant effect on *** and amlodipine,either alone orin combination,significantly increased the lifespan of SHR-SP,with the best ef-fect elicited by the combination ***:A significant synergismexists between atenolol and amlodipine in lowering and stabilizing blood pressurein *** therapy may be an optimal strategy for the prevention ofstroke in hypertension.

关键词： stroke hypertension stroke-prone spontaneouslyhypertensive rats atenolol amlodipine blood pressure blood pressure variability

Life-Cycle Bearing Capacity for Pre-Stressed T-beams Based on Full-Scale Destructive Test

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Structural Durability & Health Monitoring 2025年第1期19卷 145-166页

作者： Yushan Ye Tao Gao Liankun Wang Junjie Ma Yingchun cai Heng liu Xiaoge liu China Construction Seventh Engineering Division Corp. Ltd.Zhengzhou450004China School of Water Conservancy and Transportation Zhengzhou UniversityZhengzhou450001China

To investigate the evolution of load-bearing characteristics of pre-stressed beams throughout their service life and to provide a basis for accurately assessing the actual working state of damaged pre-stressed concrete T-beams,destructive tests were conducted on full-scale pre-stressed concrete *** on the measurement and ana-lysis of beam deﬂection,strain,and crack development under various loading levels during the research tests,combined with the veriﬁcation coefﬁcient indicators speciﬁed in the codes,the veriﬁcation coefﬁcients of bridges at different stages of damage can be *** results indicate that the T-beams experience complete,incom-plete linear,and non-linear stages during the destructive test *** the complete linear elastic stage,both the deﬂection and bottom strain veriﬁcation coefﬁcients comply with the speciﬁcations,indicating a good structural load-bearing capacity no longer adheres to the code’s *** the non-linear stage,both coefﬁcients exhi-bit a sharp increase,resulting in a further decrease in the structure’s load-bearing *** to the pro-visions of the current code,the beam can be in the incomplete linear stage when both values fall within the code’s speciﬁed *** strain veriﬁcation coefﬁcient sourced from the compression zone at the bottom of theﬂange is not recommended for assessing the bridge’s load-bearing capacity.

关键词： Pre-stressed T-beams whole process destructive test bearing capacity veriﬁcation coefﬁcient