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Geothermobarometry of Askaoun Pluton in Ouzellarh-Sirwa Promontory (Central Anti-Atlas;Morocco)

Open Journal of Geology 2012年第3期2卷 136-147页

作者： Abdeslam Toummite moha Ikenne El Hassane Beraaouz Applied Geology and Environmental Geology Laboratory Faculty of Sciences Ibn Zohr University Agadir Morocco

Rocks of the late Neoproterozoic Askaoun pluton (558 ± 2 ma) located in the Ouzellarh-Sirwa promontory (Anti-Atlas) include magmatic microgranular enclaves (MMEs) ranging from rounded to ovoid in shape, dark and fine grained and generally 5 to 10 cm in size, some reaching a size of 50 cm. They are composed of microdiorite, quartz microdiorite and micromonzodiorite, whereas the felsic host rocks comprise mainly quartz-diorite and amphibole-biotite granodiorite based on mineralogical compositions. The mineral assemblage is similar to those described in their hosting granitoids but with different proportions. In this study composition of minerals is used to describe the nature of the magma and estimate the pressure, temperature and oxygen fugacity at which Askaoun pluton is emplaced. Based on chemistry of biotite Askaoun pluton formed from calc-alkaline magma. Compositions of plagioclase (An5 - An29);hornblende (Mg ≠= 0.59 - 0.65) and biotite (Mg ≠= 0.49 - 0.55) of MMEs are slightly distinct or similar to those of host rocks (An7-40;hbl Mg ≠= 0.64 - 0.69;Bi Mg ≠= 0.49 - 0.50) which suggest partial to complete equilibration during mafic-felsic magma interaction. The coexisting hornblende and plagioclase (hornblende-plagioclase thermometry), Al content in hornblende (aluminum-in-hornblende barometry) and the assemblage titanite-magnetite-quartz were used to constrain the P, T and fO2 during the crystallization of the parent magmas. The Askaoun pluton was emplaced at temperature ca. 504°C - 633°C and at pressure ca. 0.9 - 4.66 ± 0.6 Kbars (average depth = 6.5 km) from a highly oxidized magma (log fO2 = ?24.8 to ?19.2).

关键词： Askaoun Pluton MMEs Hornblende Thermobarometry Ouzellargh-Sirwa Promontory Anti-Atlas Morocco

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Hybrid Control Strategy for Air-conditioning Loads Participating in Peak Load Reduction Through Wide-range Transport Model

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Journal of Modern Power Systems and Clean Energy 2022年第6期10卷 1542-1551页

作者： Yunfeng ma Zengqiang Mi Ruifeng Zhang Huowen Peng Yulong Jia School of Electrical&Electronic Engineering North China Electric Power UniversityBeijingChina Department of Electrical Engineering North China Electric Power UniversityBaodingChina University of Edinburgh Old CollegeSouth BridgeEdinburghEH89YLUK Planning&Design Institute at State Grid Integrated Energy Services Group Co. Ltd.Beijing 100032China

This paper proposes a hybrid control strategy of air-conditioning loads(ACLs)for participating in peak load *** hybrid control strategy combines the temperature setpoint adjustment(TSA)control and on/off control together to make full use of response potentials of *** primary free transport model of ACLs has been established in literature at or near a fixed temperature *** this paper,a wide-range transport(WRT)model suitable for larger value of TSA is *** WRT model can be constructed easily through the parameter of devices and indoor and outdoor *** modulate the aggregate response characteristics of ACLs more friendly to the power grid,the safe protocol(SP)is adopted and integrated into the WRT model,which achieves a good unification of oscillation suppression and efficient ***,the hybrid control strategy is implemented based on the WRT model,and the model predictive control(MPC)controller is designed considering the tracking error and control switch *** last,the superiority of the hybrid control strategy is verified and the performance of ACLs for peak load reduction under this controller is *** simulation results show that the hybrid control strategy could exploit the load reduction potential of ACLs fully than the TSA mode and track the reference signal more accurately.

关键词： Peak load reduction air conditioning load aggregate modeling response characteristics state space model model predictive control

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Distributed Robust Optimal Dispatch of Regional Integrated Energy Systems Based on ADMM Algorithm with Adaptive Step Size

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Journal of Modern Power Systems and Clean Energy 2024年第3期12卷 852-862页

作者： Zhoujun ma Yizhou Zhou Yuping Zheng Li Yang Zhinong Wei the College of Energy and Electrical Engineering Hohai UniversityNanjing 211100China State Grid Jiangsu Electric Power Co. Ltd.Nanjing 210019China State Key Laboratory ofSmart Grid Protection and Control NARI Group CorporationNanjing 211106China

This paper proposes a distributed robust optimal dispatch model to enhance information security and interaction among the operators in the regional integrated energy system(RIES).Our model regards the distribution network and each energy hub(eh)as independent operators and employs robust optimization to improve operational security caused by wind and photovoltaic(PV)power output uncertainties,with only deterministic information exchanged across *** paper also adopts the alternating direction method of multipliers(ADMM)algorithm to facilitate secure information interaction among multiple RIES operators,maximizing the benefit for each ***,the traditional ADMM algorithm with fixed step size is modified to be adaptive,addressing issues of redundant interactions caused by suboptimal initial step size settings.A case study validates the effectiveness of the proposed model,demonstrating the superiority of the ADMM algorithm with adaptive step size and the economic benefits of the distributed robust optimal dispatch model over the distributed stochastic optimal dispatch model.

关键词： Regional integrated energy system(RIES) distributed optimization robust optimization operation security energy hub(eh)

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Adding regular expressions to graph reachability and pattern queries

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Frontiers of Computer Science 2012年第3期6卷 313-338页

作者： Wenfei FAN Jianzhong LI Shuai ma Nan TANG Yinghui WU School of Informatics University of EdinburghEdinburgh EH89YLUK Department of Computer Science and Engineering Harbin Institute of TechnologyHarbin 150001China NLSDE Lab Beihang UniversityBeijing 100919China Qatar Computing Research Institute Qatar FoundationDohaQatar

It is increasingly common to find graphs in which edges are of different types, indicating a variety of relation- ships. For such graphs we propose a class of reachability queries and a class of graph patterns, in which an edge is specified with a regular expression of a certain form, ex- pressing the connectivity of a data graph via edges of var- ious types. In addition, we define graph pattern matching based on a revised notion of graph simulation. On graphs in emerging applications such as social networks, we show that these queries are capable of finding more sensible informa- tion than their traditional counterparts. Better still, their in- creased expressive power does not come with extra complex- ity. Indeed, （1） we investigate their containment and mini- mization problems, and show that these fundamental prob- lems are in quadratic time for reachability queries and are in cubic time for pattern queries. （2） We develop an algorithm for answering reachability queries, in quadratic time as for their traditional counterpart. （3） We provide two cubic-time algorithms for evaluating graph pattern queries, as opposed to the NP-completeness of graph pattern matching via subgraph isomorphism. （4） The effectiveness and efficiency of these al- gorithms are experimentally verified using real-life data and synthetic data.

关键词： graph reachability graph pattern queries regu-lar expressions containment equivalence minimization

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Effects of contamination of single and combined cadmium and mercury on the soil microbial community structural diversity and functional diversity

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Chinese Journal Of Geochemistry 2011年第3期30卷 366-374页

作者： XIE Xiaomei LIAO Min ma Aili ZHANG Haijun The Center of Experiment Teaching College of Environmental and Resource Sciences Zhejiang University Hangzhou 310058 China Department of Resources Science College of Environmental and Resources Sciences Zhejiang University Hangzhou 310058 China Zhejiang Provincial Key Laboratory of Subtropical Soil and Plant Nutrition Hangzhou 310058 China

To assess the effects of single and combined pollution of cadmium (Cd) and mercury (Hg) on soil micro-bial community structural and functional diversities, an incubation experiment was conducted, by employing two soils, namely, the marine sediment silty loam soil and the yellowish-red soil, in which five levels of Cd, Hg and Cd and Hg in combination were added. After being incubated for 56 days, the phospholipid fatty acids (PLFAs) profile and sole carbon source utilization pattern (BIOLOG) of the samples were tested. The results showed that the compo-sition of the microbial communities changed significantly at different levels of metals application. The principal component analyses (PCA) of PLFAs indicated that the structure of the microbial community was also significantly altered with increasing levels of metals, with increasing PLFAs biomarkers for fungi and actinomycetes, and in-creasing ratio of Gram-positive to Gram-negative bacteria. Sole carbon source utilization pattern analysis revealed that single and combined application of Cd and Hg inhibited significantly the functional activity of soil microorgan-isms, the functional diversity indices [Richness (S), Shannon-Wiener indices (H) and Evenness (eh)] were signifi-cantly lower in polluted soils than those in non-polluted soils, which also significantly altered with increasing levels of metals. PCA for the sole carbon source utilization pattern also indicated that the metal contamination could result in a variable soil microbial community. The results revealed that the combination of Cd and Hg had higher toxicity to soil microbial community structural and functional diversities than the individual application of Cd or Hg.

关键词：微生物群落结构镉(Cd) 功能多样性污染土壤重金属污染汞土壤微生物群落多样性指数

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猫内脏躯体反射节段性的分析

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生理学报 1982年第3期34卷 348-350页

作者：沈锷马维祥中国科学院上海生理研究所

刺激猫内脏大神经,在一根肋间神经记录反射放电(VSR),然后切断与记录的神经同节段或邻近节段的背根,或孤立脊髓,分析 VSR 的传入与传出间的节段关系。结果是不论切断同节段背根或其他节段背根,只要保留一部分节段的内脏传入,即可记录到 ... 详细信息

刺激猫内脏大神经,在一根肋间神经记录反射放电(VSR),然后切断与记录的神经同节段或邻近节段的背根,或孤立脊髓,分析 VSR 的传入与传出间的节段关系。结果是不论切断同节段背根或其他节段背根,只要保留一部分节段的内脏传入,即可记录到 VSR,但幅度减小,潜伏期延长。横切脊髓,孤立出一个节段的脊髓,保留其背根腹根,亦可在该节段的传出神经记录到 VSR。孤立出多个节段的脊髓,但只保留高位一根背根,在低位肋间神经也同样可记录到较小的 VSR。

关键词：肋间神经邻近节段腹根动物胸神经内脏大神经节段性背根躯体

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Force-controlled Compensation Scheme for P-Q Valve-controlled Asymmetric Cylinder used on Hydraulic Quadruped Robots

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Journal of Bionic Engineering 2020年第6期17卷 1139-1151页

作者： Yapeng Shi mantian Li Fusheng Zha Lining Sun Wei Guo Cong ma Zhibin Li State Key Laboratory of Robotics and System Harbin Institue of TechnologyHarbin 150001China Shenzhen Academy of Aerospace Technology China Aerospace ScienceShenzhen 518057China School of Informatics The University of EdinburghEdinburgh EH89ABUnited Kingdom

Under the requirement of the force controller of hydraulic quadruped robots,the goal of this work is to accurately track the force commands at the level of the hydraulic drive *** main contribution focuses on the development of a force-controlled compensation scheme,which is specifically aimed at the key issues affecting the hydraulic quadrupedal *** this idea,based on a P-Q valve-controlled asymmetric cylinder,we first establish a mathematical model for the hydraulic drive unit force control *** the desired force commands,a force feed-forward algorithm is presented to improve the dynamic performance of the ***,we propose a disturbance compensation algorithm to reduce the influence induced by external disturbances due to foot-ground ***,combining with a variable gain PI controller,a series of experiments are implemented on a force control performance test platform to verify the proposed *** results demonstrate that the force-controlled compensation scheme has the ability to notably improve the force tracking accuracy,reduce the response time and redundant force.

关键词： hydraulic drive unit force tracking P-Q valve-controlled asymmetric cylinder hydraulic quadruped robot

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Mutation of Residue Arginine^18 of Cytochrome b559 α-Subunit and its Effects on Photosystem Ⅱ Activities in Chlamydomonas reinhardtii

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Journal of Integrative Plant Biology 2007年第7期49卷 1054-1061页

作者： Jing-Jing ma Liang-Bi Li Yu-Xiang Jing Ting-Yun Kuang Key Laboratory of Photosynthesis and Environmental Molecular Physiology Institute of Botany Chinese Academy of Sciences Beijing 100093 China Graduate University of Chinese Academy of Sciences Beijing 100049 China

It has been known that arginine is used as the basic amino acid in the α-subunit of cytochrome bsss （Cyt bsss） except histidine. However, previous studies have focused on the function of histidine in the activities of photosystem （PS） Ⅱ and there are no reports regarding the structural and/or functional roles of arginine in PSll complexes. In the present study, two arginine18 （R18） mutants of Chlamydomonas reinhardtii were constructed using site-directed mutagenesis, in which R18 was replaced by glutamic acid （E） and glycine （G）. The results show that the oxygen evolution of the PSII complex in the R18G and R18E mutants was approximately 60% of wild-type （WT） levels and that, after irradiation at high light intensity, oxygen evolution for the PSll of mutants was reduced to zero compared with 40% in WT cells. The efficiency of light capture by PSll （Fv/Fm） of R18G and R18E mutants was approximately 42%-46% that of WT cells. Furthermore, levels of the α-subunit of Cyt bsss and PsbO proteins were reduced in thylakoid membranes compared with WT. Overall, these data suggest that R18 plays a significant role in helping Cyt bss9 maintain the structure of the PSll complex and its activity, although it is not directly bound to the heme group.

关键词： Chlamydomonas reinhardtii chloroplast transformation cytochrome b559 mutation photosystem Ⅱ.

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刺激猫中缝大核对内脏传入引起的皮层眶回诱发电位的抑制效应

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生理学报 1981年第2期33卷 198-200页

作者：沈锷马维祥蓝青中国科学院上海生理研究所

刺激延脑中缝大核可以抑制脊髓背角中间神经元对伤害性刺激的反应。国内外学者目前都趋向于认为脑的较高级部位(例如中脑导水管周围灰质)对脊髓痛觉传递的下行控制是通过中缝大核实现的。看来中缝大核在痛觉的阔制中处于较重要的地位。... 详细信息

刺激延脑中缝大核可以抑制脊髓背角中间神经元对伤害性刺激的反应。国内外学者目前都趋向于认为脑的较高级部位(例如中脑导水管周围灰质)对脊髓痛觉传递的下行控制是通过中缝大核实现的。看来中缝大核在痛觉的阔制中处于较重要的地位。本工作的目的是探讨中缝大核的下行活动究竟在多大程度上影响与痛觉有关的传入冲动的向上传递。

关键词：中缝大核痛觉表皮感觉抑制效应内脏诱发电位薄壁组织皮层

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Tracing the Methane Events by Stable Carbon Isotopes of Benthic Foraminifera at Glacial Periods in the Andaman Sea

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Journal of Earth Science 2022年第6期33卷 1571-1582页

作者： Yue Cen Jiasheng Wang Xuan Ding Dorrik Stow Zhou Wang Can Chen Xiaochen ma Hubei Key Laboratory of marine Geological Resources College of Marine Science and TechnologyState Key Laboratory of Biogeology and Environmental GeologyChina University of GeosciencesWuhan430074China School of the marine Sciences China University of GeosciencesBeijing100083China Institute of Geo-Energy Engineering Heriot-Watt UniversityEdinburghEH 144ASUK State Key Laboratory of marine Geology Tongji UniversityShanghai200092China

Stable isotopes of carbon and oxygen variations in foraminiferal shells have been widely used in paleo-environment ***,studies about the shells of benthic foraminifera in methanehydrate-bearing sediments as reliable geochemical proxies to reconstruct the potential methane release events in the geologic past are *** this study,we present the stable carbon and oxygen isotopes of fossil benthic foraminifera including one epifaunal species(Cibicidoides wuellerstorfi)and two infaunal species(Bulimina mexicana and Uvigerina peregrina)from the Site U1447 of IODP 353 Expedition to trace methane events in the Andaman Sea,where one of the thickest and deepest gas hydrate stability zones was ***δ^(13)C values of benthic foraminifera show that there are eight distinct intervals with negative values in the last~10 Myr,interpreted as a record of long-term fluctuations in methane *** of these methane events occurred during the glacial sea-level lowstands in the last~1.1 ***,therefore,infer that the trigger mechanism for these events might be the hydrate destabilization caused by sea level *** methane events that occurred at~2.11 and~5.93 ma are more likely related to the sudden changes in sedimentation,either slide events or marked variations in sedimentation rate.

关键词： benthic foraminifera stable carbon and oxygen isotopes methane events gas hydrates IODP 353 Site U1447 Andaman Sea

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