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基于高负荷活性污泥法城市污水碳捕获研究进展

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水处理技术 2024年第7期50卷 8-14,34页

作者：张慷余陈俊江周力吴志强吴鹏苏州科技大学环境科学与工程学院城市生活污水资源化利用技术国家地方联合工程实验室江苏省水处理技术与材料协同创新中心江苏苏州215009

首先综述了HRAS工艺特点,对溶解氧(DO)、污泥龄(SRT)等工艺参数对碳捕获效率的影响进行了总结;其次阐明了工艺碳重定向路径与碳捕获机理;然后介绍了化学强化高负荷活性污泥法(CEHRAS)等组合工艺的研究进展;最后提出了急需解决的问题并... 详细信息

首先综述了HRAS工艺特点,对溶解氧(DO)、污泥龄(SRT)等工艺参数对碳捕获效率的影响进行了总结;其次阐明了工艺碳重定向路径与碳捕获机理;然后介绍了化学强化高负荷活性污泥法(CEHRAS)等组合工艺的研究进展;最后提出了急需解决的问题并阐述了未来的发展前景。

关键词：碳捕获高负荷活性污泥法衍生工艺

Impact Force Localization and Reconstruction via ADMM-based Sparse Regularization Method

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Chinese Journal of Mechanical Engineering 2024年第3期37卷 170-188页

作者： Yanan Wang Lin chen junjiang Liu Baijie Qiao Weifeng He Xuefeng chen National Key Lab of Aerospace Power System and Plasma Technology Xi’an Jiaotong UniversityXi’an 710049China School of Mechanical Engineering Xi’an Jiaotong UniversityXi’an 710049China

In practice,simultaneous impact localization and time history reconstruction can hardly be achieved,due to the illposed and under-determined problems induced by the constrained and harsh measuring *** l_(1) regularization can be used to obtain sparse solutions,it tends to underestimate solution amplitudes as a biased *** address this issue,a novel impact force identification method with l_(p) regularization is proposed in this paper,using the alternating direction method of multipliers(ADMM).By decomposing the complex primal problem into sub-problems solvable in parallel via proximal operators,ADMM can address the challenge *** mitigate the sensitivity to regularization parameters,an adaptive regularization parameter is derived based on the K-sparsity ***,an ADMM-based sparse regularization method is developed,which is capable of handling l_(p) regularization with arbitrary p values using adaptively-updated *** effectiveness and performance of the proposed method are validated on an aircraft skin-like composite ***,an investigation into the optimal p value for achieving high-accuracy solutions via l_(p) regularization is *** turns out that l_(0.6)regularization consistently yields sparser and more accurate solutions for impact force identification compared to the classic l_(1) regularization *** impact force identification method proposed in this paper can simultaneously reconstruct impact time history with high accuracy and accurately localize the impact using an under-determined sensor configuration.

关键词： Impact force identification Non-convex sparse regularization Alternating direction method of multipliers Proximal operators

CdS/LaFeO_(3) heterojunctions with improved optical properties for visible-light catalytic applications

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Journal of Rare Earths 2024年第5期42卷 879-888,I0003页

作者： Jiaqi Wei Wen Zhu Xuelian Xu Xiao Xu junjiang Zhu Hubei Key Laboratory of Biomass Fibers and Eco-dyeing&Finishing College of Chemistry and Chemical EngineeringWuhan Textile University ChemistryWuhan430200China

Construction of heterojunctions is a normal and effective strategy to improve the photocatalytic performances of semiconductors,through which both the lifetime and the redox ability of electrons/holes can be improved,as co mpared to the respective *** this basis,we constructed Z-scheme CdS/LaFeO_(3) heterojunctions(CdS/LFO),by in-situ growing different amounts of CdS on the surface of LaFeO_(3),for photocatalytic degradation of tetracycline hydrochloride(TC)in aqueous solution at room *** crystal structure,surface morphology and optoelectronic properties of the COS/LFO heterojunctions were systemically characterized to correlate the reaction *** tests indicate that the CdS/LFO heterojunctions exhibit promising activity for TC degradation under visible light irradiation(λ≥420 nm),with 85%TC conversion obtained at reaction time of 45 min,which is 3.4 and 1.9 times higher than that of CdS and LaFeO_(3).The CdS/LFO heterojunctions are also stable in the reaction and can be reused for four cycles with no appreciable activity *** applicability of CdS/LFO to photocatalytic degradation of organic dyes,as well as the reaction mechanism,was also explored.

关键词： LaFeO_(3) CdS Photocatalytic degradation Tetracycline hydrochloride Reaction mechanism Rare earths

Microseismic observations reveal that internal waves intensify seabed methane release

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Science China Earth Sciences 2024年第10期67卷 3186-3203页

作者： Zhaoyang TIAN Yonggang JIA junjiang ZHU Tian chen Hui WANG Chunsheng JI chengyu LIU Longyu LU Manchao HE Shandong Provincial Key Laboratory of Marine Environment and Geological Engineering Ocean University of ChinaQingdao 266100China Frontiers Science Center for Deep Ocean Multispheres and Earth System Key Lab of Submarine Geosciences and Prospecting TechniquesMOE and College of Marine GeosciencesOcean University of ChinaQingdao 266100China Guangzhou Marine Geological Survey China Geological SurveyGuangzhou 511458China Shandong Earthquake Agency Jinan 250014China State Key Laboratory for Tunnel Engineering China University of Mining and Technology(Beijing)Beijing 100083China

Internal waves transport material and energy from the upper water column to the deep ocean, disturbing seabed sediments and resulting in phenomena such as seabed erosion and changes in topography. On the northern slope of the South China Sea and in many coastal margins worldwide, the zones with internal wave action closely overlap with areas where natural gas hydrates are present. However, due to significant differences in the spatial and temporal scales, understanding the influence of internal waves on methane releases from deep seabeds is challenging. In this study, in situ observations of seabed microseismicity and internal waves are conducted at water depths of 655 meters and 1450 meters in the Pearl River Canyon of the South China Sea. The microseismicity caused by internal waves and seabed methane releases is identified, and a method to establish the correlation between internal waves and seabed methane releases through the use of microseismic recordings is proposed, aiming to obtain direct observational evidence of internal waves intensifying seabed methane releases. The results show that internal waves and seabed methane releases generate significant microseismic signals, indicating the continuous influence of internal waves on the deep seabed of the northern slope of the South China Sea and revealing active methane release phenomena on the seabed. At both long and short time scales, internal waves increase the frequency of seabed methane releases by 4.2 times and 2.4 times, respectively, while also enhancing the intensity of these releases. These changes are influenced by the alterations in seabed flow velocity, pressure, and temperature that are induced by internal wave activities. This study emphasizes that microseismic signals are effective carriers of information for multiscale geological processes on seabeds and suggests that internal waves exacerbate marine geological hazards and contribute to global climate change by intensifying seabed methane relea

关键词： Internal waves Seabed methane release Microseismic observation Ocean bottom seismometer Northern slope of the South China Sea

Linear shallow neural network to accelerate transmitter dispersion eye closure quaternary(TDECQ) assessment

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Science China(Information Sciences) 2024年第4期67卷 337-338页

作者： junjiang XIANG Zejun chen Yijun chenG Hailin YANG Xuancheng HUO Meng XIANG Gai ZHOU Yuwen QIN Songnian FU Institute of Advanced Photonics Technology School of Information EngineeringGuangdong University of Technology School of Optical and Electronic Information Huazhong University of Science and Technology Key Laboratory of Photonic Technology for Integrated Sensing and Communication Ministry of Education of ChinaGuangdong University of Technology Guangdong Provincial Key Laboratory of Information Photonics Technology Guangdong University of Technology

To support the ever-emerging capacity requirement of datacenter interconnection(DCI) applications, transmitter dispersion eye closure quaternary(TDECQ) has been proposed by IEEE802.3 standard [1], which is specifically employed for the four-level pulse amplitude modulation(PAM-4) signals. However, the traditional scheme of TDECQ assessment needs several iterative operations,

关键词： IEEE Standards

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航空铝合金系列材料裂纹扩展性能的温度效应

北京航空航天大学学报 2017年第4期43卷 761-768页

作者：李矿熊峻江马少俊陈勃北京航空航天大学交通科学与工程学院北京100083 北京航空材料研究院北京100095

高低温裂纹扩展性能是航空金属结构损伤容限设计的前提,为此,试验测定了3种系列的6种航空铝合金材料(2024-T351、2397-T8、6061-T651、7050-T7451、7050-T7452和7475-T761)在5种温度环境(-70、-54、25、125和150℃)下的裂纹扩展性能,观... 详细信息

高低温裂纹扩展性能是航空金属结构损伤容限设计的前提,为此,试验测定了3种系列的6种航空铝合金材料(2024-T351、2397-T8、6061-T651、7050-T7451、7050-T7452和7475-T761)在5种温度环境(-70、-54、25、125和150℃)下的裂纹扩展性能,观测了试验现象,并进行了性能对比分析和疲劳断口扫描电子显微镜(SEM)分析,研究了温度对航空铝合金材料裂纹扩展性能的影响机制,获得了具有工程参考价值的结果与结论:与25℃相比,低温下裂纹扩展阻力系数的对数值降低7%~15%,而高温下却增大5%~23%;低温下裂纹扩展指数增大7%~21%,而高温下却减少5%~34%;氢脆效应和高温氧化作用是导致裂纹扩展速率随温度升高而加快的主要原因。

关键词：铝合金裂纹扩展疲劳温度扫描电子显微镜(SEM)

Carbon coated LaFe_(0.92)Pd_(0.08)O_(3) composites for catalytic transfer hydrogenation:Balance in the ability of substrates adsorption and conversion

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Nano Research 2024年第5期17卷 3724-3732页

作者： Bowen Wang Nan Zhang Ping Xiao Jian Zhang Sónia A.C.Carabineiro junjiang Zhu Hubei Key Laboratory of Biomass Fibers and Eco-dyeing&Finishing College of Chemistry and Chemical EngineeringWuhan Textile UniversityWuhan 430200China College of Chemistry and Materials Engineering Wenzhou UniversityWenzhou 325035China LAQV-REQUIMTE Department of ChemistryNOVA School of Science and TechnologyUniversidade NOVA de LisboaLargo da Torre2829-516 CaparicaPortugal

Catalytic transfer hydrogenation(CTH)is a green and efficient pathway for selective hydrogenation of unsaturated aldehydes and ***,managing the abilities of solid catalysts to adsorb substrates and to convert them into desired products is a challenging ***,we report the synthesis of carbon coated LaFe_(0.92)Pd_(0.08)O_(3) composites(LFPO-8@C)for CTH of benzaldehyde(BzH)into benzyl alcohol(BzOH),using isopropanol(IPA)as hydrogen *** coating with carbon improves the ability to adsorb/transfer reactants from solution to active sites,and the doping of Pd2+at Fe3+site strengthens the ability of LaFeO_(3) to convert BzH into BzOH.A balanced point between them(i.e.,abilities to adsorb BzH and to convert BzH into BzOH)is obtained at LFPO-8@C,which exhibits a BzOH formation rate of 3.88 mmol·gcat^(-1)·h^(-1) at 180℃ for 3 h,which is 1.50 and 2.72 times faster than those of LFPO-8 and LaFeO_(3)@C.A reaction mechanism is proposed,in which the acidic sites(e.g.,Fe^(4+),oxygen vacancy)are used for the activation of C=O bond of BzH and O-H bond of IPA,and the basic sites(e.g.,lattice oxygen)for the activation ofα-H(O-H)bond of IPA.

关键词： LaFe_(0.92)Pd_(0.08)O_(3) porous carbon catalytic transfer hydrogenation isopropanol reaction mechanism

Magnesium implantation or supplementation ameliorates bone disorder in CFTR-mutant mice through an ATF4-dependent Wnt/β-catenin signaling

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Bioactive Materials 2022年第2期7卷 95-108页

作者： Jiankun Xu Peijie Hu Xiaotian Zhang junjiang chen Jiali Wang Jieting Zhang Ziyi chen Mei Kuen Yu Yiu Wa Chung Yan Wang Xiaohu Zhang Yifeng Zhang Nianye Zheng Hao Yao Jiang Yue Hsiao Chang Chan Ling Qin Ye Chun Ruan Musculoskeletal Research Laboratory Department of Orthopedics&TraumatologyThe Chinese University of Hong KongHong KongChina Deparment of Biomedical Engineering Faculty of EngineeringThe Hong Kong Polytechnic UniversityHong KongChina Epithelial Cell Biology Research Centre School of Biomedical SciencesFaculty of MedicineThe Chinese University of Hong KongHong KongChina School of Biomedical Engineering Sun Yat-sen UniversityGuangzhouChina School of Life Science and Technology ShanghaiTech UniversityShanghaiChina

Magnesium metal and its alloys are being developed as effective orthopedic implants;however,the mechanisms underlying the actions of magnesium on bones remain *** fibrosis,the most common genetic disease in Caucasians caused by the mutation of CFTR,has shown bone disorder as a key clinical manifestation,which currently lacks effective therapeutic *** we report that implantation of magnesium-containing implant stimulates bone formation and improves bone fracture healing in CFTR-mutant ***/β-catenin signaling in the bone is enhanced by the magnesium implant,and inhibition of Wnt/β-catenin by iCRT14 blocks the magnesium implant to improve fracture healing in CFTR-mutant *** further demonstrate that magnesium ion enters osteocytes,increases intracellular cAMP level and activates ATF4,a key transcription factor known to regulate Wnt/β-catenin *** vivo knockdown of ATF4 abolishes the magnesium implant-activated β-catenin in bones and reverses the improved-fracture healing in CFTR-mutant *** addition,oral supplementation of magnesium activates ATF4 and β-catenin as well as enhances bone volume and density in CFTR-mutant ***,these results show that magnesium implantation or supplementation may serve as a potential anabolic therapy for cystic fibrosis-related bone *** of ATF4-dependent Wnt/β-catenin signaling in osteocytes is identified as a previously undefined mechanism underlying the beneficial effect of magnesium on bone formation.

关键词： Magnesium implant Cystic fibrosis-related bone disorder ATF4 Wnt/β-catenin signaling

“互联网+”现代农业发展策略——以成都为例

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开放导报 2017年第5期 44-48页

作者：陈俊江眭海霞成都市经济发展研究院四川成都610072

发展"互联网+"现代农业,对于转变农业经济发展方式,提升农业竞争力具有重大意义。本文以成都为例,分析了发展"互联网+"现代农业的基础和优势,面临的农业信息服务体系不完善、跨界创新型专业人才稀缺、电商法律法规体系不健全、农产品电... 详细信息

发展"互联网+"现代农业,对于转变农业经济发展方式,提升农业竞争力具有重大意义。本文以成都为例,分析了发展"互联网+"现代农业的基础和优势,面临的农业信息服务体系不完善、跨界创新型专业人才稀缺、电商法律法规体系不健全、农产品电商物流成本较高等问题。结合成都"互联网+"现代农业发展的"四优化"基本功能定位分析,文章提出了制定相关"互联网+"现代农业发展战略及法规、加快农业信息服务体系建设、着力支持和培养"新农人"、加强农产品物流仓储体系建设等政策建议。

关键词：互联网+ 现代农业电子商务成都市