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Reduced sulfur compounds and carboxylic acid groups in dissolved PFRs of iron-biochar enhance Cr(VI)reduction in anaerobic conditions

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Biochar 2024年第1期6卷 201-217页

作者： Shujie Hu Chengshuai Liu Hongling Bu Manjia Chen Jiao Tang Bin Jiang Yong Ran National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and ManagementInstitute of Eco-environmental and Soil SciencesGuangdong Academy of SciencesGuangzhou 510650China. State Key Laboratory of Environmental Geochemistry Institute of GeochemistryChinese Academy of ScienceGuiyang 550081China. Chongqing Institute of Green and Intelligent Technology Chinese Academy of SciencesChongqing 400714China. School of Environmental Science and Engineering Guangdong University of TechnologyGuangzhou 510006China. Guangzhou Institute of Geochemistry Chinese Academy of SciencesGuangzhou 510640China.

In addition to the adsorption and immobilization capacities of iron-modified biochars,these materials produce persistent free radicals(PFRs)that can carry out metal[i.e.,Cr(VI)]redox transformations,but the primary forms and active species of PFRs involved are not well ***,we investigated the key species of PFRs ofα-Fe2O3-modified biochar(MBC)and their influence on Cr(VI)reduction under anaerobic conditions simulating paddy soil *** produced bulk phenoxyl PFRs that promoted Cr(VI)reduction due to the catalytic effect of the transition metal *** addition,MBC was more efficient in reducing Cr(VI)under anaerobic conditions than under aerobic conditions due to the more active and accessible dissolved PFRs present in the dissolved organic matter(DOM).The electron transfer capacity of DOM was demonstrated by excitation-emission matrix(EEM)spectrophotometry combined with parallel factor analysis,which showed that the protein-like and humic-like components of DOM were involved in Cr(VI)***,Fourier transform ion cyclotron resonance mass spectrometry(FTICR-MS)analysis indicated that reduced-S compounds(O/S<4)and carboxylic acid(-COO)groups in the unsaturated aliphatic and lignin-like compounds are potentially the main active species accelerating Cr(VI)reduction under anaerobic *** results provide new insights into the role of dissolved PFRs from iron-modified biochar in promoting Cr(VI)reduction under anaerobic conditions such as flooded soils.

关键词： Biochar Iron-modification PFRs Hexavalent chromium Anaerobic condition

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An endophytic fungus interacts with the defensinlike protein OsCAL1 to regulate cadmium allocation in rice

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Molecular Plant 2024年第2期17卷 312-324页

作者： Tianyu Gu Ziai Qi Yating Wang Siying Chen Jing Yan Huapeng Qiu Yanxuan Yu Zjun Fang Junmin Wang Jiming Gong National Key Laboratory of Plant Molecular Genetics Shanghai Center for Plant Stress BiologyCAS Center for Excellence in Molecular Plant SciencesChinese AcademyofSciencesShanghai200032China School of Life Science and Technology ShanghaiTech UniversityShanghai 201210China University of the Chinese Academy of Sciences Beijing 100049China Hunan Key Laboratory of Economic Crops Genetic Improvement and Integrated Utilization College of Life ScienceHunan University of Science and TechnologyXiangtan411201China State Key Laboratory of Crop Stress Adaptation and Improvement School of Life SciencesHenan UniversityKaifeng 475004China Institute of Crops and Nuclear Technology Utilization Zhejiang Academy of Agricultural SciencesHangzhou 310021China

Defensin-like proteins are conserved in multicellular organisms and contribute to innate immune re-sponses against fungal *** rice,defensins play a novel role in regulating cadmium(Cd)efflux from the ***,whether the antifungal activity of defensins correlates with Cd-efflux function remains *** this study,we isolated an endophytic Fusarium,designed Fo1o,by a comparative mi-crobiome analysis of rice plants grown in a paddy contaminated with ***10 is tolerant to high levels of Cd,but is sensitive to the defensin-like protein OsCAL1,which mediates Cd efflux to the *** found that Fo10 symbiosis in rice is regulated by OsCAL1 dynamics,and Fo10 coordinates multiple plant pro-cesses,including Cd uptake,vacuolar sequestration,efflux to the environment,and formation of Fe pla-ques in the *** processes are dependent on the salicylic acid signaling pathway to keep Cd levels low in the cytosol of rice cells and to decrease Cd levels in rice grains without any yield ***10 also plays a role in Cd tolerance in the poaceous crop maize and wheat,but has no observed effects in the eudicot plants Arabidopsis and *** together,these findings provide insights into the mech-anistic basis underlying how afungal endophyte and host plant interact to control Cd accumulation in host plants by adapting defense responses to promotethe establishment ofa symbiosis that permits adaptation to high-Cd environments.

关键词： defensin-like protein Fusarium oxysporum endophyte cadmium allocation

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Distance image piecewise adaptive weighted fusion algorithm based on TOF and binocular vision 3

Distance image piecewise adaptive weighted fusion algorithm ...

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3rd International Computing Imaging Conference, CITA 2023

作者： Yong, Zhang Jinmeng, Zhang Manguo, Liu Wei, Yuan Zhen, Yang Dan, Jiao Jianlong, Zhang National Key Laboratory of Science and Technology on Tunable Laser Harbin Institute of Technology Harbin China Xi'an Modern Control Technology Research Institute Xi'an China Beijing Aerospace Automatic Control Institute Beijing China

ISBN: (纸本)9781510671409

3D imaging technology has wide applications in fields such as autonomous driving and engineering surveying. Among them, TOF (Time of Flight) 3D and binocular vision 3D imaging technology are the two most commonly used methods. This study investigated the influence of distance and light intensity on the ranging accuracy of TOF and binocular vision imaging methods theoretically and experimentally. An adaptive weighting-based high-precision range image generation method for the entire range was proposed. The basic idea was to assign different weights to the TOF range image and binocular vision range image at different distance intervals and use the prior weight fitting results at different light intensities and distances to guide the weighted processing of each point of the range image. And then high-precision range imaging results with higher ranging accuracy than the original TOF image and binocular vision imaging were obtained. The PSNR value increased by an average of 7.15% compared to binocular vision and increased 1.17% compared to TOF. Distance error MSE value decreased by an average of 34.76% compared to binocular vision and decreased 7.87% compared to TOF. Experimental results demonstrated the effectiveness of the proposed method, which provided a useful idea and means for further improving the ranging accuracy of existing range imaging methods. © 2023 SPIE.

关键词： Binocular vision

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3D printing of high-performance micro-supercapacitors with patterned exfoliated graphene/carbon nanotube/silver nanowire electrodes

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science China(Technological sciences) 2021年第5期64卷 1065-1073页

作者： LIU Lang LU JunYong LONG XinLin ZHOU Ren LIU YingQuan WU YiTing YAN KangWei National Key Laboratory of Science and Technology on Vessel Integrated Power System Naval University of EngineeringWuhan 430033China

Micro-supercapacitors(MSCs)show great potential as on-chip energy storage devices for portable *** major flaw of thin-film MSCs is their low energy *** improve the energy density,thicker electrodes are ***,the fabrication of MSCs with thick electrodes remains a *** this work,a novel 3D printing method is employed to fabricate high-performance MSCs with interdigitated exfoliated graphene(EG)/carbon nanotube(CNT)/silver nanowire(Ag NW)*** nanowelding of Ag NW junction plays a critical role in the realization of 3D *** enhance the electrochemical performances of EG,phosphorus atoms are incorporated into the carbon framework with 1.7 at%.The areal capacitance of the 3D printed MSC is 21.6 mF cm^(-2)at a scan rate of 0.01 V s^(-1).The areal energy density of the MSC ranges from 0.5 to 2μWh cm^(-2)with a maximum power density of 2.5 mW cm^(-2).

关键词： micro-supercapacitor 3D printing silver nanowire exfoliated graphene micro-plasma-jet

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Effect of Zr on microstructure and mechanical properties of 304 stainless steel joints brazed by Ag-Cu-Sn-In filler metal

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Journal of Iron and Steel Research International 2024年第10期31卷 2448-2462页

作者： Ling-ling Huang Jian Qin Jun-lan Huang Hua Yu Chao Jiang Lu-yang Song Zhuo-li Yu Zhi-qian Liao Yan-zhao Cai Li Ma Shi-zhong Wei School of Materials Science and Engineering Henan University of Science and TechnologyLuoyang471000HenanChina National Joint Engineering Research Center for Abrasion Control and Molding of Metal Materials Henan University of Science and TechnologyLuoyang471000HenanChina State Key Laboratory of Advanced Brazing Filler Metals and Technology Zhengzhou Research Institute of Mechanical Engineering Co.Ltd.Zhengzhou450001HenanChina Luoyang Ship Material Research Institute Luoyang471039HenanChina Avic Jonhon Optronic Technology Co. Ltd.Luoyang471039HenanChina

The effect of Zr on the microstructure and mechanical properties of 304 stainless steel joints brazed with Ag-Cu fillers was *** incorporation of Zr had little effect on the solid-liquid phase line of the fillers,and the melting temperature range of the fillers was narrowed,which enhanced their fluidity and *** presence of Zr in the form of heterogeneous particles augmented the nucleation rate during solidification,transforming the intermittently distributed gray-black coarse dendrites into cellular *** structural transformation led to fragmentation and refinement of the *** dissolution of Zr into Ag and Cu promoted the transformation of low-angle grain boundaries to high-angle grain boundaries(HAGBs),hindering crack *** element in the brazing seam led to grain refinement and increased density of grain *** grain refinement could disperse the stress,and HAGBs could resist the dislocation movement,improving the joint *** results display that when Zr content was 0.75 wt.%,the maximum strength was 221.1 *** fracture occurred primarily at the brazing seam,exhibiting a ductile fracture.

关键词： Active element Ag-Cu filler Stainless steel Brazing Mechanical property

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Multifunctional Composite Material with Efficient Microwave Absorption and Ultra-High Thermal Conductivity

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Chinese Physics Letters 2023年第10期40卷 55-59页

作者：王云韩天成梁迪飞邓龙江 National Engineering Research Center of Electromagnetic Radiation Control Materials University of Electronic Science and Technology of ChinaChengdu 611731China Key Laboratory of Multi-spectral Absorbing Materials and Structures of Ministry of Education University of Electronic Science and Technology of ChinaChengdu 611731China

The increasing demands for electronic devices to achieve high miniaturization,functional integration,and wide bandwidth will exacerbate the heat generation and electromagnetic interference,which hinders the further development of electronic ***,both the issues of microwave absorption and heat dissipation of materials need to be addressed ***,a multifunctional composite material is proposed by periodic arrangement of copper pillars in a matrix,based on the wave-absorbing *** a result,the equivalent thermal conductivity of the composite structure is nearly 35 times higher than the wave-absorbing matrix,with the area filling proportion of the thermal conductivity material being 3.14%.Meanwhile,the reflectivity of the composite structure merely changes from-15.05 d B to-13.70 d *** is proved that the designed composite structure possesses both high thermal conduction and strong microwave *** measured results accord well with the simulation results,which demonstrates that the thermal conductivity of the composite structure can reach more than 10 W·m^(-1)·K^(-1)without significant deterioration of the absorption performance.

关键词： composite microwave conductivity

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Influence Mechanism of Surface Shape Accuracy and Surface Quality in Ultra-precision Grinding 2

Influence Mechanism of Surface Shape Accuracy and Surface Qu...

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Advanced Optical Manufacturing Technologies and Applications 2022, AOMTA 2022 and 2nd International Forum of Young Scientists on Advanced Optical Manufacturing, YSAOM 2022

作者： Bao, Jiahui Peng, Xiaoqiang Hu, Hao College of Intelligence Science and Technology National University of Defense Technology 109 Deya Road Changsha410073 China Hunan Key Laboratory of Ultra-Precision Machining Technology Changsha410073 China Laboratory of Science and Technology on Integrated Logistics Support National University of Defense Technology 109 Deya Road Changsha410073 China

ISBN: (纸本)9781510661264

The improvement of surface shape accuracy and surface quality is an important aspect of ultra-precision grinding. In this paper, experiments were carried out by using a four-axis ultra-precision grinder to analyze the influence mechanism of grating machining and polar axis machining on surface shape accuracy and surface quality, and to clarify the advantages and disadvantages of the two machining processes. In the process of polar axis machining, the influence of polishing on the surface shape accuracy is analyzed, and the influence of different feed modes and x direction offset on the surface shape accuracy is clarified. By establishing the influence model of the error source on the surface shape accuracy, the error factors of the tool alignment were analyzed emphatically. Through numerical calculation and analysis of the specific form of tool alignment error, a reasonable grinding wheel center alignment scheme was put forward. The wear law of grinding wheel was analyzed through process test, and a reasonable dressing method of grinding wheel was put forward. © 2023 SPIE.

关键词： Surface properties

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A Navigation and control Framework of Quadrupedal Robot for Autonomous Exploration in Cave Environments 16th

A Navigation and Control Framework of Quadrupedal Robot for ...

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16th International Conference on Intelligent Robotics and Applications, ICIRA 2023

作者： Hu, Yong Jiang, Lisong Kang, Ke Cao, Dandan Zhou, Zhongda Liu, Junfeng Wang, Yong Li, Maodeng Hu, Haidong National Key Laboratory of Science and Technology On Space Intelligent Control Beijing Institute of Control Engineering Beijing100190 China China Academy of Space Technology Hangzhou Institute Hangzhou310001 China

ISBN: (纸本)9789819964796

This article introduces XiaoTian, a quadrupedal robot with high mobility, dynamic motion skills, and autonomous ability. The robot uses backdriveable joint actuators with high force density, and robustness to impacts during trotting. Considering the specific application environment, we design the overall navigation and control framework of the robot, including the motion controlling, mapping, and planning methods. The experiment proved that XiaoTian can perform walking gaits, dynamically trot on the uneven ground and achieve autonomous exploration in the dark cave environments. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2023.

关键词： Navigation

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A Single-Loop Narrow-Band Force Rebalance control Method with Temperature Self-Compensation for a MEMS Gyroscope 38

A Single-Loop Narrow-Band Force Rebalance Control Method wit...

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38th IEEE International Conference on Micro Electro Mechanical Systems, MEMS 2025

作者： He, Chunhua Xu, Yingyu Wu, Heng Huang, Qinwen Zhao, Qiancheng Yan, Guizhen Guangdong University of Technology School of Computer China Ceprei Science and Technology on Reliability Physics and Application Technology of Electronic Component Laboratory China Guangdong University of Technology School of Automation China Peking University School of Integrated Circuits Beijing China National Key Lab of Micro/Nano Fabrication Technology Beijing China

ISBN: (纸本)9798331508890

This paper presents a novel single-loop narrow-band force rebalance control method with temperature self-compensation for a MEMS gyroscope. The narrow-bandwidth force rebalance control for the sense mode is achieved using a simple bandpass filter (BPF) and without modulation or demodulation. The center frequency of the BPF is adjusted automatically to match the resonant frequency of the sense mode. Meanwhile, its gain is tuned based on the real-time quality factor of the sense mode. Experimental results demonstrate that the bias drift of the gyroscope with self-compensation is reduced from 1320 deg/h to 16 deg/h, while the scale factor drift is reduced from 0.616 mV/deg/s to 0.075 mV/deg/s. © 2025 IEEE.

关键词： Gyroscopes

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Geometric Feature-Based Airport Runway Line Detection

Geometric Feature-Based Airport Runway Line Detection

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International Conference on Guidance, Navigation and control, ICGNC 2024

作者： Liang, Yu National Key Laboratory of Science and Technology On Integrated Technology Control Flight Automatic Control Research Institute Xi’an710065 China AVIC Beijing100083 China

ISBN: (纸本)9789819622313

This paper introduces an algorithm that uses visual features for detecting airport runway lines. The purpose is to enable autonomous landing of unmanned aerial vehicles in the case of GPS denial, by providing runway line recognition, detection, and positioning information for the aircraft. The method uses Sobel edge detection and Hough transformation algorithms. First, it performs rough positioning of the left and right runway lines using high-level semantic understanding of the runway. Then, under the constraints of the left and right runway lines, it performs precise detection of the middle virtual lines. The article verifies the effectiveness and feasibility of the method with certain lighting conditions through experiments. Since the algorithm is based on traditional geometric information for runway line detection, it does not require expensive GPU training and reduces costs. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2025.

关键词： Hough transforms

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