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Electro-triggered Joule heating method to synthesize single-phase CuNi nano-alloy catalyst for efficient electrocatalytic nitrate reduction toward ammonia

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Nano Research 2023年第5期16卷 6632-6641页

作者： Zunjie Zhang Yang Liu xiaozhi Su Ziwei Zhao Zhenkun Mo Chenyi Wang Yaling Zhao Ye Chen Shuyan gao School of Chemistry and Chemical Engineering Henan Normal UniversityXinxiang 453007China School of Materials Science and Engineering Henan Normal UniversityXinxiang 453007China Shanghai Synchrotron Radiation Facility Shanghai Institute of Applied PhysicsChinese Academy of SciencesShanghai 201204China

Electrochemical nitrate reduction reaction(NO_(3)RR)has great potential for ammonia(NH_(3))synthesis benefiting from its environmental friendliness and ***-based alloys with elemental diversity and adsorption tunability are widely used as electrocatalyst to lower the reaction overpotential for NO_(3)RR ***,phase separation commonly found in alloys leads to uneven distribution of elements,which limits the possibility of further optimizing the catalytic ***,an electrotriggered Joule heating method,possessing unique superiority of flash heating and cooling that lead to well-dispersed nanoparticles and uniform mixing of various elements,was adopted to synthesize a single-phase CuNi nano-alloy catalyst evenly dispersed on carbon fiber paper,CFP-Cu_(1)Ni_(1),which exhibited a more positive NO_(3)RR initial potential of 0.1 V versus reversible hydrogen electrode(***)than that of pure copper nanoparticles at 10 mA·cm^(−2)in 0.5 mol·L^(−1)Na_(2)SO_(4)+0.1 mol·L^(−1)KNO_(3)***,CFP-Cu_(1)Ni_(1) presented high electrocatalytic activity with a Faradaic efficiency of 95.7%and NH_(3)yield rate of 180.58μmol·h^(−1)·cm^(−2)(2550μmol·h^(−1)·mg_(cat)^(−1))at−0.22 V *** calculations showed that alloying Cu with Ni into single-phase caused an upshift of its d-band center,which promoted the adsorption of NO_(3)−and weakened the adsorption of NH_(3).Moreover,the competitive adsorption of hydrogen ions was restrained until−0.24 *** work offers a rational design concept with clear guidance for rapid synthesis of uniformly dispersed single-phase nano-alloy catalyst for efficient electrochemical NO_(3)RR toward ammonia.

关键词： ammonia nitrate reduction reaction CuNi nano-alloy single-phase adsorption energy

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氦气资源形成地质条件、成因机理与富集规律

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石油勘探与开发 2024年第2期51卷 436-452页

作者：陶士振杨怡青陈悦刘祥柏杨威李剑吴义平陶小晚高建荣陈燕燕王晓波吴晓智陈秀艳李谦贾进华中国石油勘探开发研究院北京100083

借鉴含油气系统思路及方法,基于典型富氦气田解剖,并利用地球化学成藏方法技术,研究天然气中氦气资源形成的地质条件、成因机理与富集规律。结果表明:①氦气“生-运-聚”机理与天然气有显著差异性,氦气主要为基底富U、Th元素缓慢α衰变... 详细信息

借鉴含油气系统思路及方法,基于典型富氦气田解剖,并利用地球化学成藏方法技术,研究天然气中氦气资源形成的地质条件、成因机理与富集规律。结果表明:①氦气“生-运-聚”机理与天然气有显著差异性,氦气主要为基底富U、Th元素缓慢α衰变或深部壳幔氦释放,沿岩石圈复合输导体系运移至天然气成藏系统,依附适宜载体气聚集成藏。②氦运移输导主要受“岩石圈断裂、基底断裂、沉积层断裂、有效输导层”复合输导体系控制,基于地下流体中“氦-气-水”相平衡及相-势耦合综合分析,提出氦气运聚过程中具有“水溶相、气溶相、游离相”3种主要赋存状态,存在氦气“集流、渗流、扩散”3种运移方式。③富氦气藏形成和氦气富集通常受控于“优质氦源、高效输导、适宜载体”3大主控要素,具有“脱溶汇聚、浮力驱动、压差驱替”3种聚集成藏动力类型,已发现富氦气藏具有相对“近氦源、邻断裂、低势区、高部位”的分布规律和成藏模式。④氦气富集区勘探和评价需要依托天然气兼探/并探,在评价落实氦气“源-运-聚”要素与天然气“生-储-盖”条件耦合匹配性、局部相对低势高部位有利圈闭载体气区的基础上,综合评价优选“通源连圈、低势高位、气氦适配”的有利氦气富集区。

关键词：氦气富氦气田地质特征形成条件成因机理富集规律

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Combination Patterns and Depositional Characteristics of Ordovician Carbonate Banks in the Western Tarim Basin,China

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Acta Geologica Sinica(English Edition) 2012年第4期86卷 894-911页

作者： HU Xiaolan FAN Tailiang gao Zhiqian YU Bingsong CHEN xiaozhi WANG Hongyu WANG Jianping LI Rangbin DING Meng LI Yifan School of Energy Resources China University of Geosciences Key Laboratory of Marine Reservoir Evolution and Hydrocarbon Accumulation Mechanism Ministry of EducationChina University of Geosciences State Key Laboratory of Geological Processes and Mineral Resources China University of Geosciences CNOOC Research Institute

The combination patterns and depositional characteristics of the carbonate banks are investigated based on outcrop sections, thin sections, and carbon isotopes of Ordovician in the western Tarim Basin, China. Four carbonate bank combination patterns are deposited in the Ordovician, western Tarim Basin, including： Reef-Bank Complex （RBC）, Algae-Reef-Bank Interbed （ARBI）, Thick-Layer Cake Aggradation Bank （TLCAB）, and Thin-Layer Cake Retrogradation Bank （TLCRB）. All combination patterns show clear periods vertically. The RBC is mainly composed of reefs and bioclastic banks, and the dimension of the RBC depends on the scale of the reefs. Bioclastic banks deposits surround the reefs. The range of the ARBI is determined by the scale of algae-reefs, algae peloid dolomite microfacies and algal dolomite microfacies deposit alternating vertically. TLCAB and TLCRB are deposited as layer-cakes stacking in cycles and extending widely with cross bedding developed. The grains of TLCAB and TLCRB are diverse and multi-source. With the impacting of relative sea level change, biological development and geomorphology, the ARBI, TLCAB or TLCRB, RBC are successively developed from the Lower Ordovician Penglaiba Formation to the Middle Ordovician Yijianfang Formation. The depositional environment analysis of Ordovician indicates that the RBC and ARBI can form effective oil and gas reservoirs, and the TLCAB and TLCRB have the potential to form the huge scale oil and gas reservoirs and to be the crucial targets of exploration for the Ordovician carbonate banks in the future.

关键词： Carbonate bank reef-bank complex algae-reef-bank interbed thick-layer cake aggradation bank thin-layer cake retrogradation bank Ordovician western Tarim Basin

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Visualizing grain boundaries in monolayer MoSe2 using mild H2O vapor etching

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Nano Research 2018年第8期11卷 4082-4089页

作者： Jinhuan Wang xiaozhi Xu Ruixi Qiao Jing Liang Can Liu Bohao Zheng Lei Liu Peng gao Qingze Jiao Dapeng Yu Yun Zhao Kaihui Liu School of Chemistry and Chemical Engineering Beijing Institute of Technology Beijing 100081 China State Key Laboratory for Mesoscopic Physics School of Physics Peking University 8eijing 100871 China Department of Materials Science and Engineering College of Engineering Peking University 8eijing 100871 China International Centre for Quantum Materials and Electron Microscopy Laboratory School of Physics Peking University Beijing 10087 I China Department of Physics South University of Science and Technology of China Shenzhen 518055 China Collaborative Innovation Centre of Quantum Matter Beijing 100871 China Jinhuan Wang Xiaozhi Xu and Ruixi Qiao contributed equally to this work.

Beyond graphene, two-dimensional （2D） transition metal dichalcogenides （TMDs） have attracted significant attention owing to their potential in next-generation nanoelectronics and optoelectronics. Nevertheless, grain boundaries are ubiquitous in large-area as-grown TMD materials and would significantly affect their band structure, electrical transport, and optical properties. Therefore, the characterization of grain boundaries is essential for engineering the properties and optimizing the growth in TMD materials. Although the existence of boundaries can be measured using scanning tunneling microscopy, transmission electron microscopy, or nonlinear optical microscop~ a universal, convenient, and accurate method to detect boundaries with a twist angle over a large scale is still lacking. Herein, we report a high-throughput method using mild hot H20 etching to visualize grain boundaries of TMDs under an optical microscope, while ensuring that the method is nearly noninvasive to grain domains. This technique utilizes the reactivity difference between stable grain domains and defective grain boundaries and the mild etching capacity of hot water vapor. As grain boundaries of two domains with twist angles have defective lines, this method enables to visualize all types of grain boundaries unambiguously. Moreover, the characterization is based on an optical microscope and therefore naturally of a large scale. We further demonstrate the successful application of this method to other TMD materials such as MoS2 and WSe2. Our technique facilitates the large-area characterization of grain boundaries and will accelerate the controllable growth of large single-crystal TMDs.

关键词： MoSez,grain boundar3 hot water vapor single crystal

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靶向幽门螺杆菌UreB鲨鱼纳米抗体的筛选与鉴定

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中国海洋药物 2024年第4期43卷 35-41页

作者：高艳春王艳归张玉秀冯世涛席晓志顾玉超中国海洋大学医药学院山东青岛266003

目的开发靶向幽门螺杆菌(H. pylori)尿素酶B亚基(UreB)的鲨鱼纳米抗体。方法利用大肠杆菌表达系统对UreB进行重组表达,纯化后对条纹斑竹鲨进行免疫,通过间接ELISA检测免疫后鲨鱼血浆的抗体效价。提取鲨鱼外周血淋巴细胞及脾脏组织的总... 详细信息

目的开发靶向幽门螺杆菌(H. pylori)尿素酶B亚基(UreB)的鲨鱼纳米抗体。方法利用大肠杆菌表达系统对UreB进行重组表达,纯化后对条纹斑竹鲨进行免疫,通过间接ELISA检测免疫后鲨鱼血浆的抗体效价。提取鲨鱼外周血淋巴细胞及脾脏组织的总RNA,即鲨源新抗原受体可变区(variable domain of immunoglobulin new antigen receptor,VNAR)构建鲨鱼纳米抗体噬菌体展示文库。扩增噬菌体文库,采用固相淘选,通过噬菌体多克隆ELISA检测特异性噬菌体的富集程度。通过单克隆ELISA鉴定阳性噬菌体,并通过序列比对,确定靶向UreB的鲨鱼纳米抗体序列。构建鲨鱼纳米抗体重组表达质粒,利用大肠杆菌表达系统制备重组鲨鱼纳米抗体。通过ELISA检测鲨鱼纳米抗体对重组UreB和H. pylori菌株的结合能力。结果成功制备了重组UreB蛋白,用于免疫鲨鱼,经6次免疫后构建了库容量为1.28×10^(8) CFU的鲨鱼纳米抗体噬菌体展示文库。淘选到的2株靶向UreB的鲨鱼纳米抗体,具有较高的亲和力,其中1E3可特异性结合H. pylori。结论成功筛选到靶向UreB鲨鱼纳米抗体,为H. pylori感染的诊断和治疗药物的开发奠定了基础。

关键词：幽门螺杆菌 UreB 鲨鱼纳米抗体噬菌体展示

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SUMO1 regulates post-infarct cardiac repair based on cellular heterogeneity

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Journal of Pharmaceutical Analysis 2023年第2期13卷 170-186页

作者： Zhihao Liu xiaozhi Liu Li Liu Ying Wang Jie Zheng Lan Li Sheng Li Han Zhang Jingyu Ni Chuanrui Ma Xiumei gao Xiyun Bian Guanwei Fan First Teaching Hospital of Tianjin University of Traditional Chinese Medicine National Clinical Research Center for Chinese Medicine Acupuncture and MoxibustionTianjin300193China State Key Laboratory of Component-Based Chinese Medicine Tianjin301617China Tianjin Key Laboratory of Epigenetics for Organ Development in Preterm Infants The Fifth Central Hospital of TianjinTianjin300450China Haihe Laboratory of Modern Chinese Medicine Tianjin301617China

Small ubiquitin-related modifier(SUMOylation)is a dynamic post-translational modification that maintains cardiac function and can protect against a hypertrophic response to cardiac pressure ***,the function of SUMOylation after myocardial infarction(MI)and the molecular details of heart cell responses to SUMO1 deficiency have not been *** this study,we demonstrated that SUMO1 protein was inconsistently abundant in different cell types and heart regions after ***,SUMO1 knockout significantly exacerbated systolic dysfunction and infarct size after myocardial ***-nucleus RNA sequencing revealed the differential role of SUMO1 in regulating heart *** cardiomyocytes,SUMO1 deletion increased the Nppa^(+)Nppb^(+)Ankrd1^(+)cardiomyocyte subcluster pro-portion after *** addition,the conversion of fibroblasts to myofibroblasts subclusters was inhibited in SUMO1 knockout ***,SUMO1 loss promoted proliferation of endothelial cell subsets with the ability to reconstitute neovascularization and expressed angiogenesis-related *** analysis of ligand/receptor interactions suggested putative pathways that mediate cardiomyocytes to endothelial cell communication in the *** preinjected with cardiomyocyte-specific AAV-SUMO1,but not the endothelial cell-specific form,and exhibited ameliorated cardiac remodeling following ***,our results identified the role of SUMO1 in cardiomyocytes,fibroblasts,and endothelial cells after *** findings provide new insights into SUMO1 involvement in the patho-genesis of MI and reveal novel therapeutic targets.

关键词： Myocardial infarction SUMO1 SnRNA-seq Cardiomyocyte

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Low-temperature epitaxy of transferable high-quality Pd(111)films on hybrid graphene/Cu(111)substrate

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Nano Research 2019年第11期12卷 2712-2717页

作者： Zhihong Zhang xiaozhi Xu Ruixi Qiao Junjiang Liu Yuxia Feng Zhibin Zhang Peizhao Song Muhong Wu Lan Zhu Xuelin Yang Peng gao Lei Liu Jie Xiong Enge Wang Kaihui Liu State Key Laboratory for Mesoscopic Physics International Centre for Quantum MaterialsCollaborative Innovation Centre of Quantum MatteSchool of PhysicsAcademy for Advanced Interdisciplinary StudiesPeking UniversityBejing 100871China Physical Science Laboratory Huairou National Comprehensive Science CentreBeijing 101400China School of Physics and Telecommunication Engineering South China Normal UniversityGuangzhou 510631China Department of Materials Science and Engineering College of EngineeringPeking UniversityBeijing 100871China Songshan Lake Materials Laboratory Institute of PhysicsChinese Academy of SciencesGuangdong 523808China Peking Union Medical College Hospital Beijing 100730China State Key Laboratory of Electroric Thin Films and ltegrated Devices University of Electronic Science and Teclmology of ChinaChengdu 610054China

The continuous pursuit of miniaturization in the electronics and optoelectronics industry demands all device components with smaller size and higher performance,in which thin metal film is one heart material as conductive ***,conventional metal filmns are typically polycrystalline with random domain orientations and various grain boundaries,which greatly degrade their mechanical,thermal and electrical ***,it is highly demanded to produce single-crystal metal films with epitaxy in an appealing *** epitaxy on non-metal single-crystal substrates has difficulty in exfoliating away due to the formation of chemical *** developed epitaxy on single-crystal graphene enables the easy exfoliation of epilayers but the annealing temperature must be high(typical 500-1,000℃ and out of the tolerant range of integrated circuit technology)due to the relative weak intertacial *** we demonstrate the facile production of 6-inch transferable high-quality Pd(111)filims on single-crystal hybrid graphene/Cu(111)substrate with CMOS-compatible annealing temperature of 150℃ *** interfacial interaction between Pd and hybrid graphene/Cu(111)substrate is strong enough to enable the low-temperature epitaxy of Pd(111)films and weak enough to facilitate the easy film release from *** obtained Pd(111)films possess superior properties to polyrystalline ones with-0.25 eV higher work function and almost half sheet *** technique is proved to be applicable to other metals,such as Au and *** the single-crystal graphene/Cu(111)substrates are obtained from industrial Cu foils and accessible in meter scale,our work will promote the massive applications of large-area high-quality metal fims in the development of next-generation electronic and optoelectronic devices.

关键词： single-crystal metal film graphene/Cu(111)substrate intertacial interactions meter scale

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基于选题小组访谈法的医务人员科研素养研究

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医学教育管理 2024年第4期10卷 504-510页

作者：梁书语高原孙晓志翟子妍谢佳鑫薛咏茜焦静轩孟开首都医科大学公共卫生学院北京100069 航天中心医院科研处北京100049 首都医科大学附属北京天坛医院高质量发展中心北京100070

目的探究医务人员应具备的科研素养,为进一步提升医务人员科研能力提供参考依据。方法2022年7月对H医院的16名医务人员实施两组选题小组访谈,根据访谈结果将条目归纳总结并按其重要性进行评分。结果医务人员科研素养包括两个一级条目、... 详细信息

目的探究医务人员应具备的科研素养,为进一步提升医务人员科研能力提供参考依据。方法2022年7月对H医院的16名医务人员实施两组选题小组访谈,根据访谈结果将条目归纳总结并按其重要性进行评分。结果医务人员科研素养包括两个一级条目、7个二级条目和32个三级条目,二级素养条目中专业能力、发现问题能力、科研态度分数较高,三级条目中提出科研问题能力、科研课题设计能力、文献阅读能力评分较高。结论专业能力是医务人员的最基本的科研素养,提出科学问题并进行课题设计是最重要的科研素养,论文撰写能力是科研产出的关键素养,科研态度是开展科研工作的动力,组建专业化科研团队和交叉学科合作能力能够提升医务人员的科研能力。

关键词：选题小组访谈法医务人员科研素养

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Fault Diagnosis Based on Batch-normalized Stacked Sparse Autoencoder

Fault Diagnosis Based on Batch-normalized Stacked Sparse Aut...

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第三十九届中国控制会议

作者： Liu xiaozhi gao Yang Yang Yinghua College of Information Science and Engineering Northeastern University

A fault diagnosis method based on batch-normalization stacked sparse autoencoder（SSAE） is presented in this paper. This paper use the autoencoder to extract features for fault diagnosis on account of its good performance in feature extraction. In order to improve the accuracy of the extracted features, this paper use a sparse representation which is a constraint during the encoding process. The multi-layer structure of autoencoder has an internal covariate shift problem and the generalization ability of the network is critical, batch normalization is employed before the activation function in each layer of the autoencoder network. And a stacked method is utilized to optimize network structure and reduce training difficulty. So the features of the original signal are extracted by the network based on the above method and the extracted features are placed in the classifier to identify different health states. For the purpose of fault diagnosis,this paper uses the proposed method to experiment with the bearing data set provided by Case Western Reserve University（CWRU）. The experiment proves that the proposed method has a better fault diagnosis performance compared with other traditional methods.

关键词： Fault diagnosis Sparse autoencoder Batch-normalization

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独托幽岩展素心:鲁迅旧体诗的美学特征

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东岳论丛 2021年第12期42卷 73-81,191页

作者：于小植高嘉迎北京语言大学人文社会科学部北京100083

作为"五四"新文化运动的主将,鲁迅力主"以白话取代文言",自己却始终不放弃旧体诗创作,这是意味深长的事实存在。这既是一种个人趣味的体现,又是一种语言意识的彰显。鲁迅旧体诗的美学特征主要体现在以理性节制情感、士传统下的文人趣味... 详细信息

作为"五四"新文化运动的主将,鲁迅力主"以白话取代文言",自己却始终不放弃旧体诗创作,这是意味深长的事实存在。这既是一种个人趣味的体现,又是一种语言意识的彰显。鲁迅旧体诗的美学特征主要体现在以理性节制情感、士传统下的文人趣味以及诗意模糊形成的多义阐释空间三个方面,这些旧体诗记录了自己过往的生活和相对私密的情感经历,并从语言层面、内容层面、思想层面全方位、多角度拓宽了旧体诗的表达疆界,具有独特的美学价值,有助于我们深化对鲁迅文学创作与美学思想的理解。

关键词：鲁迅旧体诗美学特征文人趣味多义阐释

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