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Facile biphasic catalytic process for conversion of monoterpenoids to tricyclic hydrocarbon biofuels

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Journal of Energy Chemistry 2020年第10期29卷 42-50页

作者： Shaoqu Xie Trong HHuynh Peiyong Qin Tianwei Tan Hongfei Lin The Gene and Linda Voiland School of Chemical Engineering and Bioengineering Washington State UniversityPullmanWA 99164 National Energy research and development Center for Biorefinery Beijing University of Chemical TechnologyBeijing 100029China

Terpenoids have drawn much attention to scientists in synthesizing high-performance bio-jet fuels due to their ring structures,which feature potential high ***,a facile biphasic catalytic process has been developed for the production of high-density tricyclic hydrocarbon biofuels from a monoterpenoid,1,8-cineole,using sulfuric acid(H2SO4)as the homogeneous catalyst.A^100%conversion of 1,8-cineole and a>40%carbon yield of cyclic dimers were achieved at 100℃within two *** mechanism for the acid-catalyzed conversion of 1,8-cineole to cyclic hydrocarbon dimers were *** particular,the formation of the diene intermediates and the following dimerization of dienes was essential to synthesize tricyclic terpene *** biphasic catalytic process accelerated the deoxygenation rate and enabled the dimerization with the aid of organic solvent while controlling the reaction rates to avoid the formation of solid ***,this process also facilitated the product separation by organic solvent extraction while enabling easy recycle of the homogenous catalysts.

关键词： Cineole High-density biofuels Biphasic catalytic process Diels-Alder reaction Dehydration

Thermal decomposition and kinetics of plastic bonded explosives based on mixture of HMX and TATB with polymer matrices

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Defence Technology（防务技术） 2017年第1期13卷 22-32页

作者： Arjun Singh Tirupati C.Sharma Mahesh Kumar Jaspreet Kaur Narang Prateek Kishore Alok Srivastava Terminal Ballistics research Laboratory Defence Research&Development OrganisationMinistry of DefenceExplosive DivisionSector 30Chandigarh(UT)160030India Department of Chemistry&Centre for Advanced Studies in Chemistry Panjab UniversityChandigarh160 014India

This work describes thermal decomposition behaviour of plastic bonded explosives(PBXs) based on mixture of 1,3,5,7-tetranitro-1,3,5,7-tetrazocane(HMX) and 2,4,6-triamino-1,3,5-trinitrobenzene(TATB)with Viton A as polymer binder. Thermal decomposition of PBXs was undertaken by applying simultaneous thermal analysis(STA) and differential scanning calorimetry(DSC) to investigate influence of the HMX amount on thermal behavior and its kinetics. Thermogravimetric analysis(TGA) indicated that the thermal decomposition of PBXs based on mixture of HMX and TATB was occurred in a three-steps. The first step was mainly due to decomposition of HMX. The second step was ascribed due to decomposition of TATB, while the third step was occurred due to decomposition of the polymer matrices. The thermal decomposition % was increased with increasing HMX amount. The kinetics related to thermal decomposition were investigated under non-isothermal for a single heating rate measurement. The variation in the activation energy of PBXs based on mixture of HMX and TATB was observed with varying the HMX amount. The kinetics from the results of TGA data at various heating rates under non-isothermal conditions were also calculated by Flynn—Wall—Ozawa(FWO) and Kissinger-Akahira-Sunose(KAS)methods. The activation energies calculated by employing FWO method were very close to those obtained by KAS method. The mean activation energy calculated by FWO and KAS methods was also a good agreement with the activation energy obtained from single heating rate measurement in the first step decomposition.

关键词： Plastic bonded explosives Thermogravimetric analysis Differential scanning calorimeter Thermal decomposition Kinetics

神经系统疾病脑机接口临床研究实施与管理的中国专家共识

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中华医学杂志 2024年第23期104卷 2105-2112页

作者：中华医学会神经外科学分会中国卒中学会脑血管外科分会 Department of Neurosurgery Beijing Tiantan Hospital Capital Medical University Beijing 100070 China China National Clinical research Center for Neurological Diseases Beijing 100070 China

脑机接口(BCI)技术的发展及其初步研究成果展现了巨大临床应用前景。特别是在神经系统疾病领域应用BCI技术是目前研究的热点, 而当前BCI技术仍停留在实验探索阶段, 亟需系统、规范的临床研究验证。为此, 本共识由中华医学会神经外科学... 详细信息

脑机接口(BCI)技术的发展及其初步研究成果展现了巨大临床应用前景。特别是在神经系统疾病领域应用BCI技术是目前研究的热点, 而当前BCI技术仍停留在实验探索阶段, 亟需系统、规范的临床研究验证。为此, 本共识由中华医学会神经外科学分会和中国卒中学会脑血管外科分会牵头, 在多学科专家的深入研讨和德尔菲法表决的基础上, 针对临床前资质审核、临床研究实施与管理以及长期效应跟踪与评估等环节提出了指导意见与原则, 以规范研究伦理准则和临床研究流程, 进一步推动BCI技术在神经系统疾病治疗中的广泛应用与深入发展。

关键词：神经系统疾病脑机接口专家共识

Cross-sectional deformation of H96 brass double-ridged rectangular tube in rotary draw bending process with different yield criteria

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Chinese Journal of Aeronautics 2020年第6期33卷 1788-1798页

作者： Yangyang XIA Yuli LIU Mengmeng LIU research&development Institute of Northwestern Polytechnical University in Shenzhen Shenzhen 518057China State Key Laboratory Solidification Process School of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi'an 710072China

Different yield criterion has great difference in predicting the deformation of tube with different *** order to improve the prediction accuracy of the cross-sectional deformation of the double-ridged rectangular tube(DRRT)during rotary draw bending(RDB)process,Mises isotropic yield criterion,Hill’48 and Barlat/Lian anisotropic yield criteria commonly used in practical engineering are introduced to simulate RDB of *** inverse method combining uniaxial tensile test of whole tube and response surface methodology was proposed to identify the parameters of Hill’48 and Barlat/Lian yield criteria of small-sized H96 brass extrusion DRRT as *** based on ABAQUS/Explicit platform,the FE models of RDB process of DRRT considering Mises,Hill’48 and Barlat/Lian yield criteria were *** results show that:The variation trend of cross-sectional deformation ratio is same when using different yield *** cross-sectional deformation ratio by using Mises yield criterion is close to that by using Hill’48 yield ***,there is a quite difference between by using Barlat/Lian yield criterion and by using Mises or Hill’48 yield *** prediction values of cross-sectional height deformation by using three yield criteria all underestimate the experiment ones,and the prediction values of cross-sectional width deformation overestimate the experiment *** comparing the simulation results of cross-sectional deformation of the DRRT with different yield criteria and experiment ones,Barlat/Lian yield criterion is found to be suitable for describing the RDB process of DRRT.

关键词： Anisotropy yield criterion Cross-sectional deformation H96 double-ridged rectangular tube H-type rotary draw bending Inverse method

Synergistic anticancer effect of the extracts from Polyalthia evecta caused apoptosis in human hepatoma(HepG2)cells

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Asian Pacific Journal of Tropical Biomedicine 2012年第8期2卷 589-596页

作者： Sasipawan Machana Natthida Weerapreeyakul Sahapat Barusrux Kanjana Thumanu Warapom Tanthanuch Graduate School Faculty of Pharmaceutical SciencesKhon Kaen University Center for research and development of Herbal Health Products Faculty of Pharmaceutical SciencesKhon Kaen University Centre for research and development of Medical Diagnostic Laboratories Faculty of Associate Medical SciencesKhon Kaen University Synchrotron Light research Institute(Public Organization) Nakhon Ratchasima

Objective:To evaluate the anticancer activity of the extract fraction of Polyalthia evecta(P. evecta)(Pierre) Finet & Gagnep and the synergistic anticancer effect of the extracts from *** by using the ATR/FT-IR ***:The 50%ethanol-water crude leaf extract of ***(EW-L) was prepared and was further fractionated to isolate various *** anticancer activity was investigated from cytotoxicity against HepG2 using a neutral red assay and apoptosis induction by evaluation of nuclei morphological changes after DAPI staining. Synergistic anticancer effects of the extracts from *** were performed using the ATR/FTIR ***:The result showed that the EW-L showed higher cytotoxicity and apoptosis induction in HepG2 cells than its fractionated *** hexane extract exhibited higher cytotoxicity and apoptosis induction than the water extracts,but less than the EW-L. The combined water and hexane extracts apparently increased cytotoxicity and apoptosis ***%apoptotic cells induced by the extract mixture were increased about 2-fold compared to the single hexane extract Conclusions:The polar extract fraction is necessary for the anticancer activity of the non-polar extract *** ATR/FT-IR spectra illustrates the physical interaction among the constituents in the extract mixture and reveals the presence of polyphenolic constituents in the EW-L,which might play a role for the synergistic anticancer effect.

关键词： Polyalthia evecta Synergistic Apoptosis induction Cytotoxicity Anticancer activity Hepatoma ATR/FT-IR spectroscopy

Isotopic compositions of small shelly fossil Anabarites from Lower Cambrian in Yangtze Platform of South China: Implications for palaeocean temperature

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Progress in Natural Science:Materials International 2007年第10期17卷 1185-1191页

作者： Chen Yongquan1,2, Jiang Shaoyong1, Ling Hongfei1, Yang Jinghong1 and Wan Defan3(1. State Key Laboatory for Mineral Deposits research and Center for Marine Geochemistry research, Department of Earth Sciences, Nanjing University, Nanjing 210093, China 2. Tarim Oilfield Company Exploration & development research Institute, Ku’erle 841000, China 3. Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China) State Key Laboratory for Mineral Deposits research and Center for Marine Geochemistry research Department of Earth Sciences Nanjing University Nanjing 210093 China Tarim Oilfield Company Exploration & development research Institute Ku'' erle 841000 China Institute of Mineral Resources Chinese Academy of Geological Sciences Beijing 100037 China

Anabarites belong to small shelly fossils (SSF), which occur widely in the Lower Cambrian strata of Yangtze Platform in South China. They are phosphate shell in composition and represent the earliest stage of the Cambrian bioradiation of Bilateria, the so-called "Cambrian Explosion". In this study, we attempted to separate Anabarites fossils from Lower Cambrian dolostones, and we obtained samples of both the fossils (SSF) and the granular phosphates (GP). Isotopic analyses were performed on samples of SSF, GP, and matrix dolostone (DH-23). The results showed that the δ30Si values of the quartz filling in fossils celoms, and the siliceous materials in granular phosphates are -0.6‰ and -0.7‰, which is different from normal sedimentary siliceous rocks from the Lower Cambrian strata (0—0.7‰) as reported by Li et al., but is consistent with the data for siliceous rocks and cherts of submarine hydrothermal origin. It is likely that a later hydrothermal replacement could have taken place in the SSF-bearing sedimentary rocks. The oxygen isotope values of the phosphate of SSF and GP are 16.8‰ and 17.0‰, respectively. These are significantly higher than the Neoproterozoic phosphate ores (10.9‰—13.9‰) as reported by Ling et al., hence, late diagenesis and hydrothermal replacement may not have caused a significant change in the oxygen isotope compositions of the small shelly fossils, and the calculated temperatures (25.4—26.3℃) for palaeo-seawater using a SSF phosphate oxygen isotope thermometer are therefore considered here as the upper limit of seawater temperature in the Early Cambrian ocean of the Yangtze Platform.

关键词： Anabarites oxygen isotope silicon isotope paleo-temperature.

Real-time Energy Management of Grid-connected Microgrid with Flexible and Delay-tolerant Loads

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Journal of Modern Power Systems and Clean Energy 2020年第6期8卷 1196-1207页

作者： Sevda Zeinal-Kheiri Amin Mohammadpour Shotorbani Behnam Mohammadi-Ivatloo IEEE the Faculty of Electrical and Computer Engineering University of TabrizTabrizIran the School of Engineering University of British Columbia OkanaganKelownaCanada the Institute of research and development Duy Tan UniversityDa NangVietnam

For optimal operation of microgrids,energy management is indispensable to reduce the operation cost and the emission of conventional *** goals can be impeded by several factors including uncertainties of market price,renewable generation,and ***-time energy management system(EMS)can effectively address uncertainties due to the online information of market price,renewable generation,and ***,some issues arise in real-time EMS as batterylimited energy *** this paper,Lyapunov optimization is used to minimize the operation cost of the microgrid and the emission of conventional ***,the problem is multiobjective and a Pareto front is derived to compromise between the operation cost and the *** a modified IEEE 33-bus distribution system,general algebraic modeling system(GAMS)is utilized for implementing the proposed EMS on two case studies to verify its applicability.

关键词： Battery energy management system(EMS) flexible and delay-tolerant load Lyapunov optimization microgrid optimal power flow renewable generation

Prospects of the Multi-channel Photometric Survey Telescope in the Cosmological Application of Type Ia Supernovae

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research in Astronomy and Astrophysics 2024年第4期24卷 183-191页

作者： Zhenyu Wang Jujia Zhang Xinzhong Er Jinming Bai Yunnan Observatories Chinese Academy of SciencesKunming 650216China University of Chinese Academy of Sciences Beijing 100049China Key Laboratory for the Structure and Evolution of Celestial Objects Chinese Academy of SciencesKunming 650216China International Centre of Supernovae Yunnan Key LaboratoryKunming 650216China South-Western Institute for Astronomy research Yunnan UniversityKunming 650500China

The Multi-channel Photometric Survey Telescope(Mephisto)is a real-time,three-color photometric system designed to capture the color evolution of stars and transients *** telescope system can be crucial in cosmological distance measurements of low-redshift(low-z,z■0.1)Type Ia supernovae(SNe Ia).To optimize the capabilities of this instrument,we perform a comprehensive simulation study before its official operation is scheduled to *** considering the impact of atmospheric extinction,weather conditions,and the lunar phase at the observing site involving the instrumental features,we simulate light curves of SNe Ia obtained by *** best strategy in the case of SN Ia cosmology is to take the image at an exposure time of 130 s with a cadence of 3 *** this condition,Mephisto can obtain hundreds of high-quality SNe Ia to achieve a distance measurement better than 4.5%.Given the on-time spectral classification and monitoring of the Lijiang 2.4 m Telescope at the same observatory,Mephisto,in the whole operation,can significantly enrich the well-calibrated sample of supernovae at low-z and improve the calibration accuracy of high-z SNe Ia.

关键词： (stars:)supernovae:general (cosmology:)cosmological parameters telescopes

Implementation of advanced peripheral bus interface for MV10 MCU

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Journal of Shanghai University(English Edition) 2011年第4期15卷 287-291页

作者：胡越黎黄俊凉周俊 School of Mechatronics Engineering and Automation Shanghai University Micro-electronic research and development Center Shanghai University

MV10 is an MCU which consists of PWM, ADC,CAN and some other function blocks. It is designed for car body＇s control. Advanced peripheral bus （APB） is a low speed AMBA bus connecting low-power peripherals. This paper presents an implementation of APB interface for MV10 MCU. After that, MV10 can be integrated into any AMBA system on chips （SoCs） easily. We have built a multi-core system with ABMA to verify this design, In this system ARM9 is a main processor mounted on AHB and MV10 acts as a low-power and low-speed slaver on APB. Before building this system, some operations are encapsulated into a task with dedicated ID. MV10 works as a co-processor with ARM by acquiring task ID from ARM. The result of simulation indicates that MCU can work well as expected. Based on our design, MV10 can be mounted on any AMBA system from now on.

关键词： MV10 MCU advanced peripheral bus (APB) system on chip (SoC)