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Effects of U-ore on the chemical and isotopic composition of products of hydrous pyrolysis of organic matter

Petroleum Science 2017年第2期14卷 315-329页

作者： Yu-Wen Cai Shui-Chang Zhang Kun He jing-kui mi Wen-Long Zhang Xiao-Mei Wang Hua-Jian Wang Chao-Dong Wu School of Earth and Space Sciences Peking University Beijing 100087 China Research Institute of Petroleum Exploration and Development (RIPED) Beijing 100083 China State Key Laboratory of Enhanced Oil Recovery Beijing 100083 China

In order to investigate the impact of U-ore on organic matter maturation and isotopic fractionation,we designed hydrous pyrolysis experiments on Type-II kerogen samples,supposing that the water and water–mineral interaction play a role.U-ore was set as the variable for ***,anhydrous pyrolysis under the same conditions was carried out as the control *** determination of liquid products indicates that the presence of water and minerals obviously enhanced the yields of C（15＋） and the amounts of hydrocarbon and nonhydrocarbon *** results may be attributed to waterorganic matter reaction in the high-temperature system,which can provide additional hydrogen and oxygen for the generation of gas and liquid products from organic *** is found that δD values of hydrocarbon gases generated in both hydrous pyrolysis experiments are much lower than those in anhydrous *** is more,δD values are lower in the hydrous pyrolysis with uranium ***,we can infer that water-derived hydrogen played a significant role during the kerogen thermal evolution and the hydrocarbon generation in our *** exchange was facilitated by the reversible equilibration between reaction intermediaries with hydrogen under hydrothermal conditions with uranium *** isotopic fractionations of hydrocarbon gases were somehow affected by the presence of water and the uranium *** increased level of i-C4/n-C4ratios for gas products in hydrous pyrolysis implied the carbocation mechanism for water-kerogen reactions.

关键词： Organic-inorganic interaction Hydrous pyrolysis Stable isotopes U-ore Carbocation mechanism

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川西北地区海相烃源岩地球化学特征、分布规律及天然气勘探潜力

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天然气地球科学 2021年第3期32卷 319-333页

作者：胡国艺贺飞米敬奎袁懿琳郭谨豪中国石油勘探开发研究院北京100083 中国石油油气地球化学重点实验室北京100083

川西北地区为近年来四川盆地天然气勘探的热点地区,但时至今日对该区海相烃源岩的地球化学特征和分布仍缺乏全面的研究。选取8条露头剖面对川西北地区下震旦统陡山沱组、上震旦统灯三段、下寒武统筇竹寺组、下志留统龙马溪组、中泥盆统... 详细信息

川西北地区为近年来四川盆地天然气勘探的热点地区,但时至今日对该区海相烃源岩的地球化学特征和分布仍缺乏全面的研究。选取8条露头剖面对川西北地区下震旦统陡山沱组、上震旦统灯三段、下寒武统筇竹寺组、下志留统龙马溪组、中泥盆统、中二叠统茅口组、上二叠统龙潭组/吴家坪组和大隆组8套海相烃源岩进行了系统的有机地球化学分析,探讨了该区天然气勘探潜力。筇竹寺组优质烃源岩厚度最大,可达80 m,其次是上二叠统龙潭组/吴家坪组和大隆组,厚度可达20~30 m,其他层系优质烃源岩厚度均较薄。从有机质丰度来看,陡山沱组、筇竹寺组、龙马溪组、龙潭组/吴家坪组和大隆组总有机碳含量(TOC)大于3%的发育优质烃源岩,灯三段、中泥盆统、茅口组有机碳含量整体偏低。从下寒武统筇竹寺组至上二叠统大隆组烃源岩干酪根碳同位素值逐渐增高,陡山沱组、灯三段和筇竹寺组烃源岩δ^(13)C值小于-30.0‰,有机质类型以Ⅰ型为主,龙潭组/吴家坪组与大隆组烃源岩δ^(13)C值主要分布在-28.0‰~-26.0‰之间,有机质类型以Ⅱ2型为主,其他介于两者之间。川西北地区除广元矿山梁、朝天二叠系和朝天泥盆系的烃源岩处于成熟阶段之外,大部分地区处于过成熟阶段,主要以生干气为主。多套高丰度烃源岩的发育奠定了川西北地区海相天然气资源丰富,以筇竹寺组和上二叠统烃源岩为气源的含气系统是川西北地区未来天然气勘探的关注领域。

关键词：川西北地区海相烃源岩有机碳有机质类型成熟度勘探潜力

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Boosting Photocatalytic Performance of Cu-Mn Co-doped CeO_(2) Nanoparticles for Tetracycline Degradation

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Journal of Wuhan University of Technology(Materials Science) 2025年第1期40卷 42-48页

作者： XU Rongqi mi Jianxin WANG Shulin XU Man ZHU Li BAI Lei TANG Dandan LEI Yu Engineering Research Center of Environmental Materials and Membrane Technology of Hubei Province School of Materials Science and EngineeringWuhan Institute of TechnologyWuhan 430205China Shaanxi Coal Chemical Industry Technology Research Institute Co. Ltd.Xi’an 710100China

Cu-Mn co-doped CeO_(2) photocatalyst was successfully synthesized by the sol-gel method to assess its capability in degrading *** and TEM results showed that Cu and Mn were successfully co-doped into CeO_(2) without forming heterostructure,XPS and photoelectrochemical results revealed that Mn ions doping amplified the generation of photo-induced charge carriers,while Cu ions doping significantly facilitated the interfacial charge transfer ***,the optimized Cu3Mn2CeO_(2) nanoparticles exhibited the highest TC removal efficiency,achieved a rate of 78.18%and maintained a stable cycling performance.

关键词： photocatalyst co-doped charge separation water treatment

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Highly mass activity electrocatalysts with ultralow Pt loading on carbon black for hydrogen evolution reaction

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International Journal of minerals,Metallurgy and Materials 2025年第1期32卷 182-190页

作者： Shaorou Ke Yajing Zhao Xin min Yanghong Li Ruiyu mi Yangai Liu Xiaowen Wu minghao Fang Zhaohui Huang Engineering Research Center of ministry of Education for Geological Carbon Storage and Low Carbon Utilization of Resources Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid WastersNational Laboratory of Mineral MaterialsSchool of Materials Science and TechnologyChina University of Geosciences(Beijing)Beijing 100083China

Pt-based nanocatalysts offer excellent prospects for various ***,the low loading of Pt with excellent performance for efficient and stable nanocatalysts still presents a considerable *** this study,nanocatalysts with ultralow Pt content,excellent performance,and carbon black as support were prepared through in-situ ***~2-nm particles uniformly and stably dispersed on carbon black because of the strong s-p-d orbital hybridizations between carbon black and Pt,which suppressed the agglomeration of Pt *** unique structure is beneficial for the hydrogen evolution *** catalysts exhibited remarkable catalytic activity for hydrogen evolution reaction,exhibiting a potential of 100 mV at 100 mA·cm^(-2),which is comparable to those of commercial Pt/C *** activity(1.61 A/mg)was four times that of a commercial Pt/C catalyst(0.37 A/mg).The ultralow Pt loading(6.84wt%)paves the way for the development of next-generation electrocatalysts.

关键词： hydrogen evolution reaction ultralow platinum in-situ synthesis ultrasound

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Insights into spinal muscular atrophy from molecular biomarkers

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Neural Regeneration Research 2025年第7期20卷 1849-1863页

作者： Xiaodong Xing Xinzhu Liu Xiandeng Li mi Li Xian Wu Xiaohui Huang Ajing Xu Yan Liu Jian Zhang Department of Clinical Pharmacy Xinhua HospitalShanghai Jiao Tong University School of MedicineShanghaiChina College of Pharmacy Chongqing Medical UniversityChongqingChina

Spinal muscular atrophy is a devastating motor neuron disease characterized by severe cases of fatal muscle *** is one of the most common genetic causes of mortality among infants aged less than 2 *** research is currently receiving more attention,and new candidate biomarkers are constantly being *** review initially discusses the evaluation methods commonly used in clinical practice while briefly outlining their respective pros and *** also describe recent advancements in research and the clinical significance of molecular biomarkers for spinal muscular atrophy,which are classified as either specific or non-specific *** review provides new insights into the pathogenesis of spinal muscular atrophy,the mechanism of biomarkers in response to drug-modified therapies,the selection of biomarker candidates,and would promote the development of future ***,the successful utilization of biomarkers may facilitate the implementation of gene-targeting treatments for patients with spinal muscular atrophy.

关键词： biomarkers disease progression gene-targeting therapy neurofilaments Nusinersen spinal muscular atrophy(SMA) survival motor neuron therapeutic evaluation treatment outcomes

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Operation Risk Analysis of Electric Vehicle With Ultra-fast Charging Integrated to Distribution Network Considering the Bearing Capacity of Power System

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Dianwang Jishu/Power System Technology 2025年第1期49卷 187-197页

作者： Xu, Yanchun Li, Sijia Zhang, Tao mi, Lu Hubei Provincial Key Laboratory for Operation and Control of Cascaded Hydropower Station China Three Gorges University Hubei Province Yichang 443002 China Department of Electrical and Computer Engineering Texas A & M University TX 77840 United States

At present, the access of distributed generation and electric vehicles with ultra-fast charging to the distribution network will increase the operational risk of the system. Aiming at the problem that the existing risk assessment indicators fail to consider the system capacity effectively, this paper proposed a comprehensive index of risk assessment of distribution networks considering the power system's capacity. The distributed generation output model and the electric vehicle load model with ultra-fast charging were first constructed. Then, the index based on the distribution entropy theory was used to measure the risk caused by the over-limit of state variables such as voltage and power and the uncertainty of their distribution. The index based on the Theil entropy theory was introduced to measure the risk caused by the equilibrium degree of the incremental distribution of state variables after the load impacted the system. The weight analysis method combining the order relationship method and the objective weighting method was used to evaluate the system risk comprehensively. Finally, the rationality of the comprehensive index was calculated and analyzed by testing the IEEE 33-node system. The results show that the comprehensive index proposed can effectively evaluate the potential risk when the system does not exceed the limit and consider that the ultra-fast charging of electric vehicles will change the time series distribution characteristics of comprehensive risk. The research in this paper can provide theoretical guidance for the safe operation of electric vehicles. with ultra-fast charging connected to the distribution network. © 2025 Power System Technology Press. All rights reserved.

关键词： Risk analysis

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Additive neurorestorative effects of exercise and docosahexaenoic acid intake in a mouse model of Parkinson’s disease

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Neural Regeneration Research 2025年第2期20卷 574-586页

作者： Olivier Kerdiles Méryl-Farelle Oye mintsa mi-mba Katherine Coulombe Cyntia Tremblay VincentÉmond Martine Saint-Pierre Clémence Rouxel Line Berthiaume Pierre Julien Francesca Cicchetti Frédéric Calon Facultéde pharmacie UniversitéLaval1050 Avenue de la MédecineQuebecQCCanada Axe Neuroscience Centre de recherche du CHU de Québec-UniversitéLaval(Pavillon CHUL)2705 Boulevard LaurierQuebecQCCanada Institute of Nutrition and Functional Foods QuebecQCCanada Optinutribrain International Associated Laboratory(NutriNeuro FranceINAFCanada)QuebecQCCanada Axe Endocrinologie et Néphrologie Centre de recherche du CHU de Québec-UniversitéLavalQuebecQCCanada Département de Médecine Facultéde MédecineUniversitéLavalQuebecQCCanada Département de Psychiatrie et Neurosciences Facultéde MédecineQuebecQCCanada

There is a need to develop interventions to slow or reverse the degeneration of dopamine neurons in Parkinson’s disease after *** that preclinical and clinical studies suggest benefits of dietary n-3 polyunsaturated fatty acids,such as docosahexaenoic acid,and exercise in Parkinson’s disease,we investigated whether both could synergistically interact to induce recovery of the dopaminergic ***,mice received a unilateral stereotactic injection of 6-hydroxydopamine into the striatum to establish an animal model of nigrostriatal *** weeks after lesion,animals were fed a docosahexaenoic acid-enriched or a control diet for the next 8 *** this period,the animals had access to a running wheel,which they could use or *** acid treatment,voluntary exercise,or the combination of both had no effect on(i)distance traveled in the open field test,(ii)the percentage of contraversive rotations in the apomorphine-induction test or(iii)the number of tyrosine-hydroxylase-positive cells in the substantia nigra pars ***,the docosahexaenoic acid diet increased the number of tyrosine-hydroxylase-positive terminals and induced a rise in dopamine concentrations in the lesioned *** to docosahexaenoic acid treatment or exercise alone,the combination of docosahexaenoic acid and exercise(i)improved forelimb balance in the stepping test,(ii)decreased the striatal DOPAC/dopamine ratio and(iii)led to increased dopamine transporter levels in the lesioned *** present results suggest that the combination of exercise and docosahexaenoic acid may act synergistically in the striatum of mice with a unilateral lesion of the dopaminergic system and provide support for clinical trials combining nutrition and physical exercise in the treatment of Parkinson’s disease.

关键词： 6-hydroxydopamine dopamine dopamine transporter exercise neurorestoration Parkinson’s disease polyunsaturated fatty acids omega-3

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含DG的交直流不平衡配电系统暂态电压稳定性分析

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电力自动化设备 2025年第1期 33-41页

作者：徐艳春王霖张涛王凌云 mi Lu 三峡大学梯级水电站运行与控制湖北省重点实验室德克萨斯农工大学电气与计算机工程学院

分布式电源（DG）以及大量恒功率直流负荷接入交直流配电系统使得母线暂态电压表现出正负极耦合且多波动的特性，现有暂态电压稳定性评估方法准确率低且适用性较差。推导分析了双极交直流配电系统直流侧线路、负荷参数不平衡时影响系统... 详细信息

分布式电源（DG）以及大量恒功率直流负荷接入交直流配电系统使得母线暂态电压表现出正负极耦合且多波动的特性，现有暂态电压稳定性评估方法准确率低且适用性较差。推导分析了双极交直流配电系统直流侧线路、负荷参数不平衡时影响系统母线暂态电压稳定的因素。基于二元表判据思想，提出一种改进的自适应母线暂态电压稳定性评估指标。针对参数不平衡时含DG的双极交直流配电系统，引入稳定性保持因子，提出母线与系统的暂态电压稳定裕度计算方法。基于所提方法利用MATLAB/Simulink仿真平台在改进的IEEE 33节点与IEEE 69节点双极交直流配电系统中量化影响系统暂态电压稳定性的因素，并对比验证了所提指标的有效性和优越性。

关键词：暂态电压稳定性交直流系统不平衡配电系统直流故障分析

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中华文化生命体的特征探析

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新疆师范大学学报（哲学社会科学版） 2025年第2期46卷 122-127页

作者：秘天一新疆大学马克思主义学院新疆乌鲁木齐830046

中华文化生命体呈现对环境刺激的反应、生长发育、新陈代谢、自我调节和超脱自然选择等特征,具有整体性、连贯性、创新性、开放性与和平性特质。整体性和连贯性确保中华文化在数千年发展中的赓承延续与稳定,通过“天人合一”“和而不同... 详细信息

中华文化生命体呈现对环境刺激的反应、生长发育、新陈代谢、自我调节和超脱自然选择等特征,具有整体性、连贯性、创新性、开放性与和平性特质。整体性和连贯性确保中华文化在数千年发展中的赓承延续与稳定,通过“天人合一”“和而不同”实现内在和谐统一;创新性使中华文化在历史长河中保持强大的生长力,推动中华优秀传统文化现代转型,实现马克思主义中国化的新飞跃;开放性增强了中华文化的适应性和生命力,通过吸收和融合外来优秀文化元素,使中华文化在全球化进程中保持独特性和竞争力,并以开放姿态积极借鉴吸收人类文明一切优秀成果,推动文化守正创新;和平性源于对和谐、和合文化的深刻理解,强调和谐共生、和合共在、和平发展,通过对话与合作解决争端。中华文化生命体在全球化背景下展现出独特的现代价值和全球视野,彰显了中华文化的强大生命力和国际影响力。

关键词：习近平文化思想中华文化生命体两个结合文化新使命中华优秀传统文化

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Experiment on impedance adaptation of under-actuated gripper using tactile array under unknown environment

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Science China(Information Sciences) 2018年第12期61卷 127-140页

作者： jing CUI mi LAI Zhongyi CHU Fuchun SUN School of Mechanical Engineering and Applied Electronics Beijing University of Technology Department of Computer Science and Technology Tsinghua University School of Instrument Science and Opto-electronics Beihang University

The experiment on impedance adaptation to achieve stable grasp for an under-actuated gripper grasping different unknown objects with tactile array is conducted. Under-actuated gripper has a wildly application in the field of space robot and industrial robot because of its better shape-adaptation. However it is difficult to achieve stable grasp owning to the uncertain properties of environment. A control strategy of adaptive matching the impedance parameters is proposed to achieve stable grasp. Firstly, the unknown objects are described as linear systems with unknown dynamics, and the parameters of the object are identified with the recursive least-squares(RLS) method through tactile sensor array. Then a desired impedance model is obtained by defining a cost function that includes the contact force, velocity and displacement errors, and the critical impedance parameters are found to minimize it. Finally, an experiment is presented and shows that the proposed impedance model can guarantee the stable grasp for various unknown objects.

关键词： impedance adaptation under-actuated gripper tactile array stable grasp unknown environment

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