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Combining biological denitrification and electricity generation in methane-powered microbial fuel cells

Journal of Environmental Sciences 2023年第8期130卷 212-222页

作者： Linpeng Yu eryi zhang Lin Yang Shiqi Liu Christopher Rensing Shungui Zhou Resources and Environment Fujian Agriculture and Forestry UniversityFuzhou 350002China Cranfield University CranfieldBedfordshire MK43 OALUK Biofuels Institute School of Environment and Safety EngineeringJiangsu UniversityZhenjiang 212013China

Methane has been demonstrated to be a feasible substrate for electricity generation in microbial fuel cells(MFCs)and denitrifying anaerobic methane oxidation(DAMO).However,these two processes were evaluated separately in previous studies and it has remained unknown whether methane is able to simultaneously drive these processes.Here we investigated the co-occurrence and performance of these two processes in the anodic chamber of MFCs.The results showed that methane successfully fueled both electrogenesis and denitrification.Importantly,the maximum nitrate removal rate was significantly enhanced from(1.4±0.8)to(18.4±1.2)mg N/(L·day)by an electrogenic process.In the presence of DAMO,the MFCs achieved a maximum voltage of 610 mV and a maximum power density of 143±12 mW/m^(2).Electrochemical analyses demonstrated that some redox substances(e.***.riboflavin)were likely involved in electrogenesis and also in the denitrification process.High-throughput sequencing indicated that the methanogen Methanobacterium,a close relative of Methanobacterium espanolae,catalyzed methane oxidation and cooperated with both exoelectrogens and denitrifiers(e.g.,Azoarcus).This work provides an effective strategy for improving DAMO in methane-powered MFCs,and suggests that methanogens and denitrifiers may jointly be able to provide an alternative to archaeal DAMO for methane-dependent denitrification.

关键词： Anaerobic methane oxidation Denitrification Microbial fuel cells Electricity generation Electroactive compounds Methanobacterium

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基于EMD-GRU的港口堆场煤炭含水率智能预测与实验研究

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中国煤炭 2024年第5期50卷 104-112页

作者：李娜刘强张淼张崇进胡而已张帆国家能源投资集团神华黄骅港务有限责任公司河北省沧州市061000 中国矿业大学〈北京〉人工智能学院北京市海淀区100083 应急管理部信息研究院北京市朝阳区100029

针对煤炭港口堆场洒水抑尘需求,提出了基于EMD-GRU的煤炭含水率预测模型并进行了实验验证。通过建立煤炭堆场含水率预测模型,利用实时数据驱动预测煤炭堆垛含水率变化,根据气象数据与含水率变化情况判断煤炭堆垛未来起尘情况并制定相应... 详细信息

针对煤炭港口堆场洒水抑尘需求,提出了基于EMD-GRU的煤炭含水率预测模型并进行了实验验证。通过建立煤炭堆场含水率预测模型,利用实时数据驱动预测煤炭堆垛含水率变化,根据气象数据与含水率变化情况判断煤炭堆垛未来起尘情况并制定相应的洒水策略。实验结果表明,EMD-GRU模型的均方根误差、平均绝对误差、平均绝对百分比误差和决定系数分别为0.768、0.566、9.52%、0.944,与SVR、DTR、RNN、LSTM、GRU等预测模型相比,EMD-GRU预测模型的各误差值均最低,决定系数为最高,且预测精度与拟合效果最好。

关键词：煤含水率气象要素深度学习 EMD-GRU 预测模型

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智能矿山数据质量管理研究及实践

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中国煤炭 2024年第2期50卷 70-76页

作者：韩培强胡而已叶兰冯智愚张卫伟陕煤集团神木张家峁矿业有限公司陕西省榆林市719300 应急管理部信息研究院北京市朝阳区100029 应急管理部大数据中心北京市东城区100013

数据作为矿山企业的重要生产力,是数字化、智能化煤矿建设的基础,已快速融入到煤矿生产、运输和安全检查等各环节。从矿山业务场景角度出发,结合煤矿数据特点,阐述了数据质量的定义、维度和数据质量量化管理的概念,从事前预防、事中控... 详细信息

数据作为矿山企业的重要生产力,是数字化、智能化煤矿建设的基础,已快速融入到煤矿生产、运输和安全检查等各环节。从矿山业务场景角度出发,结合煤矿数据特点,阐述了数据质量的定义、维度和数据质量量化管理的概念,从事前预防、事中控制以及事后补救3方面介绍了智能矿山数据质量管理策略和技术,从而实现数据质量的全流程控制。以理论指导实践,将相关理论应用于智能矿山的具体业务及生产流程,从顶层设计、组织保障、流程控制以及结果评估等多个方面进行阐述,给出了智能矿山数据质量管理的典型案例。

关键词：智能化煤矿业务场景数据质量管理实践应用

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Microstructure evolution and deformation mechanism ofα+βdual-phase Ti-xNb-yTa-2Zr alloys with high performance

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Journal of Materials Science & Technology 2022年第36期131卷 68-81页

作者： Ting zhang Daixiu Wei eryi Lu Wen Wang Kuaishe Wang Xiaoqing Li Lai-Chang zhang Hidemi Kato Weijie Lu Liqiang Wang State Key Laboratory of Metal Matrix Composites School of Material Science and EngineeringShanghai Jiao Tong UniversityShanghai200240China School of Metallurgical Engineering Xi’an University of Architecture and TechnologyXi’an710055China Institute for Materials Research Tohoku University2-1-1 KatahiraSendaiMiyagi980-8577Japan Department of Stomatology Renji HospitalSchool of MedicineShanghai Jiao Tong UniversityShanghai200127China Department of Materials Science and Engineering KTH-Royal Institute of Technology10044StockholmSweden School of Engineering Edith Cowan University270 Joondalup DriveJoondalupPerthWA 6027Australia

Biomedicalβ-phase Ti-Nb-Ta-Zr alloys usually exhibit low elastic modulus with inadequate strength.In the present work,a series of newly developed dual-phase Ti-xNb-yTa-2Zr(wt.%)alloys with high performance were investigated in which the stability ofβ-phase was reduced under the guidelines of ab initio calculations and d-electronic theory.The effects of Nb and Ta contents on the microstructure,compressive and tensile properties were investigated.Results demonstrate that the designed Ti-xNb-yTa-2Zr alloys exhibit typical characteristics ofα+βdual-phase microstructure.The microstructure of the alloys is more sensitive to Nb rather than Ta.The as-cast alloys exhibit needle-likeα′martensite at a lower Nb content of 3 wt.%and lamellarα′martensite at an Nb content of 5 wt.%.Among the alloys,the Ti-3Nb-13Ta-2Zr alloy shows the highest compressive strength(2270±10 MPa)and compressive strain(74.3%±0.4%).This superior performance is due to the combination ofα+βdual-phase microstructure and stressinducedα"martensite.Besides,lattice distortion caused by Ta element also contributes to the compressive properties.Nb and Ta contents of the alloys strongly affect Young's modulus and tensile properties after rolling.The as-rolled Ti-3Nb-13Ta-2Zr alloy exhibits much lower modulus due to lower Nb content as well as moreα"martensite andβphase with a good combination of low modulus and high strength among all the designed alloys.Atom probe tomography analysis reveals the element partitioning between theαandβphases in which Ta concentration is higher than Nb in theαphase.Also,the concentration of Ta is lower than that of Nb in theβphase,indicating that theβ-stability of Nb is higher than that of Ta.This work proposes modernα+βdual-phase Ti-xNb-yTa-2Zr alloys as a new concept to design novel biomedical Ti alloys with high performance.

关键词： Titanium alloy Phase stability Martensite Phase transformation Mechanical behavior

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激光煤流量测量中光斑条纹过饱和问题研究

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煤炭科学技术 2023年第2期51卷 377-389页

作者：胡而已张耀应急管理部信息研究院北京100029 中国矿业大学机电工程学院江苏徐州221116

为解决煤流量三维扫描过程中亮度过饱和激光条纹中心线提取精度的问题,提出了一种对应的中心线提取算法。根据斜射式激光三角法测量原理,搭建了视觉测量系统平台,获取亮度过饱和的煤堆表面激光条纹数字图像并进行预处理。探究激光光强... 详细信息

为解决煤流量三维扫描过程中亮度过饱和激光条纹中心线提取精度的问题,提出了一种对应的中心线提取算法。根据斜射式激光三角法测量原理,搭建了视觉测量系统平台,获取亮度过饱和的煤堆表面激光条纹数字图像并进行预处理。探究激光光强的分布规律,深度剖析激光光条亮度产生过饱和的原因。在分析传统结构光中心线提取方法不适用于本研究的基础之上,针对部分过饱和提出了基于高斯曲线拟合法的中心点提取算法,而针对全部过饱和则提出了一种基于邻域块思想的中心点提取算法。最后确定以激光条纹截面上过饱和采样点数量作为判别依据的中心线提取策略,得到亚像素级坐标精度的条纹中心线。通过设置与灰度重心法、曲线拟合法的对照模拟试验,发现该算法绝对偏差均值更小,提取精度要优于传统算法。最终在煤堆激光条纹图像上开展了试验验证,表明该算法在实际工作环境下抗噪声干扰性能力更强,减少了亮度过饱和现象给煤堆表面激光条纹中心线提取所带来的影响。

关键词：煤流量扫描图像处理中心线提取提取算法

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Highly interconnected macroporous MBG/PLGA scaffolds with enhanced mechanical and biological properties via green foaming strategy

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Chinese Journal of Chemical Engineering 2021年第1期34卷 426-436页

作者： Chaobo Song Jiapeng zhang Shuang Li Shengbin Yang eryi Lu Zhenhao Xi Lian Cen Ling Zhao Weikang Yuan State Key Laboratory of Chemical Engineering School of Chemical EngineeringEast China University of Science and TechnologyShanghai 200237China Department of Stomatology of Renji Hospital School of MedicineShanghai Jiao Tong UniversityShanghai 200127China Shanghai Key Laboratory of Orthopaedic Implant Department of Orthopaedics SurgeryShanghai Ninth People's HospitalShanghai Jiao Tong University School of MedicineNo.639Zhizaoju RoadShanghai 200011China

In this study,mesoporous bioactive glass particles(MBGs) are incorporated into poly(lactic-co-glycolic acid)(PLGA) to fabricate highly interconnected macroporous composite scaffolds with enhanced mechanical and biological properties via a developed supercritical carbon dioxide(scCO_(2)) foaming method Scaffolds show favorable highly interconnected and macroporous structure through a high foaming pressure and long venting time foaming strategy.Specifically,scaffolds with porosity from 73% to 85%,pore size from 120 μm to 320 μm and interconnectivity of over 95% are controllably fabricated at MBG content from 0 wt% to 20 wt%.In comparison with neat PLGA scaffolds,composite scaffolds perform improved strength(up to 1.5 folds) and Young's modulus(up to 3 folds).The interconnected macroporous structure is beneficial to the ingrowth of cells.More importantly,composite scaffolds also provide a more promising microenvironment for cellular proliferation and adhesion with the release of bioactive ions.Hopefully,MBG/PLGA scaffolds developed by the green foaming strategy in this work show promising morphological,mechanical and biological features for tissue regeneration.

关键词： Scaffold Mesoporous bioactive glass Supercritical carbon dioxide Foaming Poly(lactic-co-glycolic acid)

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Fasudil hydrochloride differentiates bone marrow mesenchymal stem cells into neurons via notch signaling

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Neural Regeneration Research 2010年第11期5卷 814-819页

作者： eryi Zhao Liudong Wang Quanqing Wen Wenjuan Guan Jingjing Lu Tao Peng Boai zhang Yanjie Jia Department of Neurology First Affiliated Hospital Zhengzhou University Zhengzhou 450052 Henan Province China

BACKGROUND： Notch signaling regulates bone marrow mesenchymal stem cell （MSC） proliferation, differentiation, and apoptosis, Notch signaling and Rho kinase signaling exhibit a crosstalk phenomenon with JAK/STAT, and both participate in the neuronal dendritic spine development. Inhibition of RhoA/Rho kinase signaling may regulate MSC differentiation into neuronal-like cells. OBJECTIVE： To investigate the effect of Notch1 signaling on the differentiation of rat MSCs into neurons induced by fasudil hydrochloride （C14H17N3O2S-HCI）, a Rho kinase inhibitor, through a siRNA approach. DESIGN, TIME AND SETTING： An in vitro cytological experiment was performed in the Cell Laboratory of Henan Academy of Medical and Pharmaceutical Sciences between December 2007 and May 2009. MATERIALS： MSCs were obtained from Wistar rat femoral bone, fasudil hydrochloride was provided by -Tianjin Chase Sun Pharmaceutical Co., Ltd. Rn-notchl-siRNa, negative control siRNA （Cy3 label） and Rn-MAPK1 control siRNA were provided by QIAGEN, Coloqne, German. METHODS： The cultured MSCs were divided into non-transfected, transfected group （transfected with Rn-Notchl-siRNA）, positive control （transfected with Rn-MAPK-1 control siRNA）, and negative control （transfected with negative control siRNA） groups. Fasudil hydrochloride was applied to induce MSCs to differentiate into neurons. MAIN OUTCOME MEASURES： The fluorescence expression by the transfected MSCs was observed under an inverted fluorescence microscope; the expression of Notch1 mRNA, Hesl mRNA, and MAPK1 mRNA in MSCs was detected by reverse transcription polymerase chain reaction; the expression of Notch1 protein, nestin, neurofilament M, and glial fibrillary acidic protein was detected by immunocytochemistry. The viability of MSCs was detected by tetrazolium bromide assay. RESULTS： MSC fluorescence increased following a 72-hour siRNA transfection, with transfection efficiencies of up to （0.91 ± 0.04）; the Notch1 mRNA and Hesl mRNA expressed by transfected MSCs was significantly decreased （P 〈 0

关键词： Notch Rho fasudil hydrochloride marrow mesenchymal stem cells neuronal-like cells transfection nerve stem cells neural regeneration

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Raman spectra of SiC nano-rods with different excitation wavelengths

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Chinese Science Bulletin 2001年第22期46卷 1865-1866页

作者： YAN Yan HUANG Fumin zhang Shulin ZHU Bangfen SHANG eryi FAN Shoushan Department of Physics Peking UniversityBeijing 100871China Institute of Semiconductor Chinese Academy of SciencesBeijing 100083China Department of Physics Tsinghua UniversityBeijing 100084China

With increasing excitation wavelength from 514 to 782 nm, a significant difference in the Raman spectra of SiC nanorods was observed as compared to bulk material. The intensity ratio of the LO mode to that of the IF mode increases with the excitation wavelength increasing. This has been identified as resonant Raman scattering caused by Frohlich interaction.

关键词： SiC NR Raman spectroscopy Frohlich interaction

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A Comparative Study of Bone Resorption between Implant Placement Sites and Non-Implant Placement Sites after Autogenous Block Bone Grafts in the Anterior Maxilla

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Open Journal of Stomatology 2014年第4期4卷 197-207页

作者： Jisi Zheng Shanyong zhang Huaihai Fan eryi Lu Chi Yang Jingyang Zhao Department of Oral and Maxillofacial Surgery Ninth People’s Hospital Collage of Stomatology Shanghai Jiao Tong University School of Medicine Shanghai China Department of Oral Implantology Hospital Affiliated Qingdao University School of Medicine Qingdao China Department of Prosthodontics Ninth People’s Hospital Collage of Stomatology Shanghai Jiao Tong University School of Medicine Shanghai China The Intensive Care Unit The Central Hospital of Taian Qingdao China

The aim of this study was to compare the bone resorption differences between implant placement sites (IPS) and non-implant placement sites (NIPS) after autogenous block bone grafts in the anterior maxilla. Fourteen patients (58 edentulous sites) with alveolar atrophy in the anterior maxilla were treated with autogenous block bone grafts. CBCT examinations were performed at 1 month before surgery (T0), immediately after surgery (T1), 3 to 4 months after surgery (T2), 6 to 7 months after surgery before implant placement (T3), 12 to 13 months after surgery (T4), and the longest follow-up point (T5). Alveolar crestal and basal bone width (ACBW, ABBW), and alveolar bone height (ABH) were measured and divided into IPS (30 sites) and NIPS (28 sites). All results were compared by the Wilcoxon Signed Rank test. The bone resorption changes for both groups were the same. For these three parameters, ACBW didn’t change significantly from T2 to T3 and T4 to T5, ABBW didn’t change at every period from T2 to T5, and ABH didn’t change from T4 to T5. The bone resorption volume of ACBW and ABH in NIPS were more than in IPS after implant placement surgery, while the volume of ABBW was similar in both groups. At T5, the bone resorption percentages of ACBW, ABBW, and ABH were 25.57%, 16.85% and 43.84% in IPS, and 33.55%, 15.92% and 46.44% in NIPS. A more rapid loss of alveolar crest in NIPS resulted from implant placement surgery, and this reminded us of the importance of immediate implant placement.

关键词： Implant Anterior Maxilla Bone Resorption Implant Placement Site Non-Implant Placement Site

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煤矿井下无人化辅助运输系统关键基础研究及应用实践

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煤炭学报 2023年第2期48卷 1085-1098页

作者：鲍久圣章全利葛世荣胡而已袁晓明杨阳阴妍吕玉寒中国矿业大学机电工程学院江苏徐州221116 中国矿业大学(北京)机电与信息工程学院北京100083 应急管理部信息研究院北京100029 中国煤炭科工集团太原研究院有限公司山西太原030006 石家庄煤矿机械有限责任公司河北石家庄051431

辅助运输系统是煤矿生产系统的重要组成部分,辅助运输设备的先进与否直接关系到煤矿的生产效率与作业安全。近年来我国开始大力推进煤矿智能化建设,但传统辅助运输系统仍普遍存在工艺不连续、转载环节多、用工占比高、自动化程度低等现... 详细信息

辅助运输系统是煤矿生产系统的重要组成部分,辅助运输设备的先进与否直接关系到煤矿的生产效率与作业安全。近年来我国开始大力推进煤矿智能化建设,但传统辅助运输系统仍普遍存在工艺不连续、转载环节多、用工占比高、自动化程度低等现实问题,已经成为制约煤矿智能化建设和无人化发展的薄弱环节。面向煤矿辅助运输系统“无人化”发展目标,凝练提出了辅助运输系统亟需研究解决的“连续化、标准化、智能化”三大关键基础问题,分别针对轨道式、无轨式辅助运输系统给出了多种连续化、标准化和智能化解决方案,进而提出了一种新型复合式连续化无人型辅助运输系统。首先,针对往复式串车提升不连续问题,设计了一种采用悬挂式钢丝绳牵引的轨道矿车连续运输系统;针对无极绳绞车难以适应长距离运输问题,设计了一种采用耐磨胶带多点辅助驱动的长距离无极绳牵引系统;针对无轨胶轮车因爬坡能力不足而导致的应用受限问题,设计了一种采用钢丝绳辅助牵引的无轨胶轮车连续运输系统。其次,开展辅助运输系统标准化设计,基于无轨、有轨两类标准化载物平台,针对设备、长料、散料、液体等不同物料类型,设计了不同大小规格和开口形式的系列化标准容器;通过将标准化、系列化的装载容器与载物平台进行模块化组合,可实现辅助运输物料的“集装箱式”快速装运,为开展机器人化辅助运输奠定了基础。再次,面向煤矿辅助运输系统智能化建设需求,研制了无人驾驶的无轨胶轮车和单轨吊并通过现场试验进行了验证,给出了无极绳运输系统的无人化运行方案,可有效解决传统辅助运输系统用工岗位多、人为失误多等问题;进一步,针对井下转运环节和最后100 m运输亟待解决的智能化难题,设计了一种“装铲运”一体化重载搬运机器人。最后,针对传统辅助运输设备种类繁多和应用局限性问题,发明了一种“轮轨复合”且“天地衔接”的新型多功能井下运输机器人(MAGV);基于MAGV提出了煤矿井下“两地三轨”自适应连续化辅助运输系统,并分别给出了其在斜井和立井中的应用工艺。研究结果可为解决煤矿井下辅助运输系统长期存在的运输不连续、用工岗位多、智能化程度低等现实问题提供指导,从而为推动煤矿井下实现“连续、标准、智能”的“无人化”辅助运输提供了一系列务实可行的技术原理和设计方案。

关键词：煤矿井下辅助运输连续化标准化智能化无人化

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