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| 1 | Electromechanical coupling properties of a self-powered vibration sensing device for near-surface observation tower monitoring显示文摘The wind-induced vibration of a remote sensing tower is the key factor affecting the stability of image sensing and structural reliability. Monitoring the vibration of a long-time unattended tower is critical to its proper operation. Currently, most monitoring devices are supplied with wired power or battery, significantly limiting their practical applications in remote areas. In this paper,a self-powered vibration sensing device based on hybrid electromechanical conversion mechanisms is proposed. The device depends on a cylindrical magnetic levitation structure sensitive to ambient vibration for transferring mechanical energy and is taken as a dual-functional heterogeneous integrated system comprising electromagnetic, piezoelectric, and triboelectric generators. When the device vibrates under environmental force driving, the suspension magnet reciprocates vertically and generates induced electromagnetic energy, which is used to power the device. Moreover, the triboelectric and piezoelectric voltages,respectively originating from magnet impact on two separation friction materials and magnetic field repulsion-induced strain deformation of a piezoelectric sheet, are used as the synergistic sensing signals. To improve the output energy, a set of dualsegmented annular coils is designed in an electromagnetic generator, which greatly avoids the obstructive effect of the suspended magnet on the magnetic flux change at its end. Compared with a whole isochoric coil, it increases the output voltage by 78.3%.For the triboelectric sensing module, a silicone film with a large specific surface area is fabricated via 3D modification, which improves the output voltage by 29.4%. Furthermore, a pair of piezoelectric sensing modules is set to improve the accuracy of comparative sensing data. The experimental measurement shows that the device maintains a high sensitivity of 6.711 V(m s;);and excellent linearity of 0.991 in the range of 0–14 m s;. This work provides a practical strategy for the vibration monitoring of remote sensing towers and exhibits attractive potential in early warning and data analysis. | MU JiLiang HE HuiCheng MU JinBiao HE Jian SONG JinSha HAN XiaoTao FENG ChengPeng ZOU Jie YU JunBin CHOU XiuJian | 2022 | Science China(Technological Sciences)2022，65，7： | 1 |
| 2 | Comparison of the Petroleum Geology in the Deep-Water Basins between the Passive Margin of Morocco and Its Conjugate Margin of Canada显示文摘This paper systematically investigates and compares the petroleum geology elements and oil and gas exploration potential in the deep-water basins along the conjugate passive margins between Morocco in NW Africa and Nova Scotia in Canada. Both the deep-water basins along the passive margin in Morocco and its conjugate passive margin deep-water basin in Nova Scotia have undergone similar multiple stages of tectonic evolution. These conjugate basins both have Jurassic and Cretaceous source rocks;Triassic sandstone, Jurassic–Cretaceous carbonate and sandstone, and Miocene–Pliocene sandstone reservoirs;multiple sets of mudstones and regional Triassic salt as caprocks. These characteristics indicate good hydrocarbon accumulation conditions and exploration prospects. The comparison also reveals that the key exploration targets in the deep-water basins of Morocco should be Tertiary turbidite sandstone reservoirs and Jurassic–Cretaceous sandstone and carbonate reservoirs. Compared with the Scotian Basin, the Morocco deep-water basins may have Paleozoic play potential sourced from the mature Silurian hot shale source rock that extends from the onshore NW African Plate. The prospective exploration targets in the deep-water Scotian Basin should be focused on the Jurassic and Cretaceous deep-water turbidite sandstone reservoirs formed by widely-developed large river systems. | Chengpeng Song Shu Jiang Zhixin Wen Zhaomin Wang | 2020 | Journal of Earth Science2020，31，5： | 1 |
| 3 | Analysis of the world deepwater oil and gas exploration situation显示文摘The global trends in deepwater oil and gas exploration,characteristics of deepwater oil and gas discovery,and layout of deepwater oil and gas exploration business by seven major international oil companies are systematically analyzed using commercial databases(e.g.S&P Global and Rystad)and public information of oil companies.The deepwater area is currently the most important domain for global oil and gas exploration and discovery,with the most discoveries and reserves in passive continental margin basins.The deepwater discoveries have the greatest contribution to the total newly discovered oil and gas reserves in the sea areas,with an increasing number of lithological reservoirs discovered,and oil and gas discoveries mainly distributed in the Mesozoic–Cenozoic.The seven major international oil companies are widely active in various aspects of deepwater oil and gas exploration and development,and play a leading role.Based on years of theoretical understanding of global oil and gas geology and resource evaluation,it is proposed that favorable deepwater exploration areas in the future will mainly focus on three major areas:the Atlantic coast,the Indian Ocean periphery,and the Arctic Ocean periphery.Six suggestions are put forward for expanding overseas deepwater oil and gas exploration business:first,expand the sources for obtaining multi-user seismic data and improve the scientific selection of deepwater exploration areas;second,increase efforts to obtain deepwater exploration projects in key areas;third,adopt various methods to access into/exit from resource licenses flexibly;fourth,acquire licenses with large equity and operate in“dual-exploration”model;fifth,strengthen cooperation with leading international oil companies in deepwater technology;and sixth,improve business operation capabilities and gradually transform from“non-operators”to“operators”. | WEN Zhixin WANG Jianjun WANG Zhaoming HE Zhengjun SONG Chengpeng LIU Xiaobing ZHANG Ningning JI Tianyu | 2023 | Petroleum Exploration and Development2023，50，5： | 0 |
| 4 | Build-ups and hydrocarbon accumulation of the isolated carbonate platforms in the eastern Mediterranean显示文摘Based on regional geology,2D seismic and ocean drilling data,the formation of the Eratosthenes Seamount(ESM)and its surrounding isolated platforms,types of organic reefs and hydrocarbon accumulation conditions in the eastern Mediterranean were analyzed through fine tectonic interpretation and seismic facies study,and the future exploration targets were pointed out.The formation and evolution of the ESM and its peripheral isolated platforms are highly related to the open and close of the Neotethyan ocean.The precursors of the ESM and its peripheral isolated platforms are both horst-type fault blocks formed in the Middle Triassic-Early Jurassic intracontinental rift stage.The ESM and its peripheral isolated platforms underwent continued and inherited carbonate build-ups during the Middle Jurassic intercontinental rift stage,the Late Jurassic-Late Cretaceous Turonian passive drift stage,and Late Cretaceous Senonian-Miocene subduction stage,as well as medium-slight inversion transformation beginning in the Late Miocene Messinian caused by the closure of the Neotethyan ocean.Three types of isolated platforms formed controlled by variant paleo-tectonic settings:the first type is composed of a single patch-like reef controlled by a small-scale and narrow horst-type fault block,the second type consists of a single atoll controlled by a middle-scale and wide horst-type fault block,and the third type is comprised of multiple reef-beach complexes controlled by a large-scale and broad paleo-high.The first two types universally developed in the highs of the alternate sag-uplift structural zones on the south and west of Eratosthenes,and the third type only developed in the ESM.As a result of fluctuation of sea level,two sequences of reef build-ups,i.e.the Middle Jurassic Bajocian-Upper Cretaceous Turonian and the Miocene,developed in the ESM as well as the highs in the alternate sag-uplift structural zones on the south and west of Eratosthenes.Drillings have confirmed that the first two types of isolated platforms with a single patch-like reef and a single circle-like reef have good conditions for natural gas accumulations.The isolated platform of reef-beach complexes in the ESM also has accumulation potentials of natural gas and is worth prospecting. | WEN Zhixin TONG Xiaoguang GAO Huahua WANG Zhaoming CHEN Ruiyin SONG Chengpeng HE Zhengjun LIU Zuodong KANG Hailiang | 2021 | Petroleum Exploration and Development2021，48，2： | 0 |
| 5 | Fast Bulky Anion Conduction Enabled by Free Shuttling Phosphonium Cations显示文摘Highly conductive anion-exchange membranes(AEMs)are desirable for applications in various energy storage and conversion technologies.However,conventional AEMs with bulky HCO3-or Br-as counterion generally exhibit low conductivity because the covalent bonding restrains the tethered cationic group’s mobility and rotation.Here,we report an alternative polyrotaxane AEM with nontethered and free-shuttling phosphonium cation.As proved by temperature-dependent NMR,solid-state NMR,and molecular dynamics simulation,the phosphonium cation possesses a thermally trigged shuttling behavior,broader extension range,and greater mobility,thus accelerating the diffusion conduction of bulky anions.Owing to this striking feature,high HCO_(3)-conductivity of 105 mS cm^(-1) at 90℃ was obtained at a relatively lower ion-exchange capacity of 1.17 mmol g^(-1).This study provides a new concept for developing highly conductive anion-exchange membranes and will catalyze the exploration of new applications for polyrotaxanes in ion conduction processes. | Xiaolin Ge Yubin He Kaiyu Zhang Xian Liang Chengpeng Wei Muhammad A.Shehzad Wanjie Song Zijuan Ge Geng Li Weisheng Yu Liang Wu Tongwen Xu | 2022 | Research2022，，1： | 0 |
| 6 | Reservoir characteristics of the first member of Middle Permian Maokou Formation in Sichuan Basin and its periphery and inspirations to petroleum exploration,SW China显示文摘Based on a large number of field outcrops and cores taken systematically from boreholes,by microscopic observa-tion,physical property analysis,mineralogy analysis,geochemical analysis etc.,reservoir characteristics of the first member of Middle Permian Maokou Formation in Sichuan Basin('Mao 1 Me mber'for short)are analyzed.(1)Rhythmic limestone-marl reservoirs of this member mostly exist in marl layers are a set of tight carbonate fracture-pore type reservoir with low porosity and low permeability,with multiple types of storage space,mainly secondary dissolution pores and fissures of clay minerals.(2)The clay minerals are mainly diagenetic clay minerals,such as sepiolite,talc and their intermediate products,aliettite,with hardly terrigenous clay minerals,and the reservoir in different regions have significant differences in the types of clay minerals.(3)The formation of high quality tight carbonate reservoir with limestone-marl interbeds is related to the differential diagene-sis in the early seawater burial stage and the exposure karstification in the early diagenetic stage.It is inferred through th e study that the inner ramp of southwestern Sichuan Basin is more likely to have sweet spots with high production,while the outer ramp in eastern Sichuan Basin is more likely to have large scale contiguous reservoir with low production. | SU Chengpeng LI Rong SHI Guoshan JIA Huofu SONG Xiaobo | 2021 | Petroleum Exploration and Development2021，48，6： | 0 |
| 7 | Evaluation on the fresh eating quality of tree peony flowers显示文摘Tree peony(Paeonia suffruticosa)is an ornamental and medicinal plant in China.The fresh eating of flower petals has gradually become a new idea for further development.This study analyzed the sensory indexes,nutritional indexes and antioxidant indexes of fresh flowers of five cultivars,namely,‘Fengdan’(P.ostia‘Fengdan’),‘Xiangyu’(P.suffruticosa‘Xiangyu’),‘Zhaofen’(P.suffruticosa‘Zhanfen’),‘Luoyanghong’(P.suffruticosa‘Luoyanghong’)and‘High Noon’(P.‘High Noon’),to provide a theoretical basis for eating fresh tree peony flowers.The aroma volatiles of petals mainly comprised terpenes,alcohols and alkanes.‘Luoyanghong’and‘High Noon’have brighter colors.The taste test showed that‘Luoyanghong’,‘High Noon’and‘Xiangyu’were the most palatable.‘High Noon’contained the highest soluble sugar content,‘Luoyanghong’contained the highest starch and vitamin C(VC)levels,and‘Zhaofen’contained the highest soluble protein content.The contents of bioactive compounds were the highest in‘Luoyanghong’,and superoxide dismutase(SOD)activity was the highest in‘Xiangyu’.The petals were rich in essential amino acids,with the highest amount in‘Xiangyu’.‘Luoyanghong’and‘High Noon’showed strong antioxidant capacity.Therefore,tree peony flowers have excellent sensory qualities,abundant nutrients and strong antioxidant activity and could be further developed as a food to be eaten fresh.The results showed that tree peony flowers had great edible potential.Flowers of red and yellow cultivars can be considered for fresh eating on the basis of the traditional consumption of white and pink tree peony flowers. | Chengpeng Yin Xinwen Zhang Kun Li Yang Bai Ping Yang Chuanrong Li Xiuhua Song | 2022 | Food Bioscience2022，47，3： | 0 |
| 8 | Fast Bulky Anion Conduction Enabled by Free Shuttling Phosphonium Cations显示文摘Highly conductive anion-exchange membranes(AEMs)are desirable for applications in various energy storage and conversion technologies.However,conventional AEMs with bulky HCO_(3)^(-)or Br-as counterion generally exhibit low conductivity because the covalent bonding restrains the tethered cationic group’s mobility and rotation.Here,we report an alternative polyrotaxane AEM with nontethered and free-shuttling phosphonium cation.As proved by temperature-dependent NMR,solid-state NMR,and molecular dynamics simulation,the phosphonium cation possesses a thermally trigged shuttling behavior,broader extension range,and greater mobility,thus accelerating the diffusion conduction of bulky anions.Owing to this striking feature,high HCO_(3)^(-)conductivity of 105 mS cm^(-1)at 90℃ was obtained at a relatively lower ion-exchange capacity of 1.17 mmol g^(-1).This study provides a new concept for developing highly conductive anion-exchange membranes and will catalyze the exploration of new applications for polyrotaxanes in ion conduction processes. | Xiaolin Ge Yubin He Kaiyu Zhang Xian Liang Chengpeng Wei Muhammad A.Shehzad Wanjie Song Zijuan Ge Geng Li Weisheng Yu Liang Wu Tongwen Xu | 2021 | Research2021，，1： | 0 |
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