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Pollution co.dition of Petroleum Hydrocarbon Pollutant and Estimation of Its Environmental Capacities in Summer in the Bohai Sea

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Marine Science Bulletin 2005年第2期7卷 21-29页

作者：王修林李克强石晓勇祝陈坚韩秀荣邓宁宁陈虎 co.lege of Chemistry and Chemical Engineering Ocean University of China Qingdao Land of Statepower Environment Engineering co.LTD

The pollution co.dition of petroleum hydrocarbon (PH) was summarized in the Bohai Sea in this paper. The results showed that the mean co.centration of PH was (25.7±13.6) mg/m3, varying from 4.4 to 64.8 mg/m3 in the survey sea area. Laizhou Bay and Bohai Bay have been co.taminated badly inshore. The dynamic model for distribution of marine PH among multiphase environments in the Bohai Sea has been established. The environmental capacities (Eco. and surplus environmental capacities (SEco. of PH have been estimated in the Bohai Sea acco.ding to the dynamic model. The results showed that the Eco.separately were about 29 169 t/a, 177 306 t/a and 298 446 t/a under the first, seco.d and third, fourth class seawater quality standards requirement. And the Eco.of Bohai Bay, Liaodong Bay, Laizhou Bay and Central Bohai Sea were about 5 255 t/a, 8 869 t/a, 4889 t/a and 10 156 t/a respectively under the first and seco.d class seawater quality standards requirement.

关键词： Bohai Sea petroleum hydrocarbon environmental capacity dynamic model

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Sustainable preparation and characterization of thermally stable and functional cellulose nanocrystals and nanofibrils via formic acid hydrolysis

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Journal of Bioresources and Bioproducts 2017年第1期2卷 10-15页

作者： Haishun Du Chao Liu Dong Wang Yuedong Zhang Guang Yu Chuanling Si Bin Li Xindong Mu Hui Peng CAS Key Laboratory of Bio-based Material Qingdao Institute of Bioenergy and Bioprocess TechnologyChinese Academy of SciencesQingdao 266101China Tianjin Key Laboratory of Pulp and paper College of Papermaking Science and TechnologyTianjin University of Science and TechnologyTianjin 300457China CHTC Helon co.Ltd. Weifang 261100China

In this work,a sustainable method to prepare functional cellulose nanocrystals(CNCs)and cellulose nanofibrils(CNFs)using formic acid(FA)(a reco.erable organic acid)was *** FA hydrolysis,the obtained CNCs co.ld be well dispersed in ***,the CNC products and fibrous cellulosic solid residue(FCSR)in DMAC co.ld be easily separated by a co.ventional centrifugal process,and the co.lected FCSR co.ld be further fibrillated to CNFs with relatively low-intensity mechanical fibrillation *** isolated CNC products showed high crystallinity index(about 75%)and excellent thermal stability(with onset thermal degradation temperature of 325℃).Both the resultant CNCs and CNFs showed better dispersibility in DMSO,DMF and DMAC respectively because of the introduction of ester groups on the surface of the *** presence of surface ester groups co.ld increase the interface co.patibility of nanocelluloses with polymeric matrices and enable their applications in reinforcing polymeric matrix materials(*** co.posite films like PHVB+CNFs).

关键词： Cellulose nanocrystals Cellulose nanofibrils Formic acid hydrolysis Sustainable process CNF/PHBV nanoco.posites

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Downlink Channel Estimation Algorithm in TD-LTE Digital Relay Systems 14th

Downlink Channel Estimation Algorithm in TD-LTE Digital Rela...

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2012 IEEE 14th International co.ference on co.munication Technology

作者： Jianfei Liu Jie Feng Mengjun Wang xiangye Zeng Jianpo Yang School of Information Engineering Hebei University of Technology Shenzhen Branch Allwin Telecommunication Co.LTD

ISBN: (纸本)9781467321006

In this paper,focusing on the downlink channel estimation of TD-LTE digital relay system,we present a new channel estimation method which is based on LS algorithm at scattered pilot frequencies with cascaded one-dimension linear interpolation both in time and frequency ***,different algorithms for channel estimation,such as LS and LMMSE,are investigated and co.parison of linear and DFT- based interpolation is *** analyzing co.puter simulation results,it is co.cluded that the proposed method has a good performance on estimating and tracking the variance of OFDM channel through co.paring with other channel estimation ***,it also achieves a lower bit error rate （BER） at a lower co.putational co.plexity.

关键词： TD-LTE digital relay channel estimation LS linear interpolation

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Achieving Tunable co.d/Warm White‑Light Emission in a Single Perovskite Material with Near‑Unity Photoluminescence Quantum Yield

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纳微快报:英文版 2023年第11期15卷 305-316页

作者： Bo Zhou Aixuan Du Dong Ding Zexiang Liu Ye Wang Haizhe Zhong Henan Li Hanlin Hu Yumeng Shi International co.laborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education Institute of Microscale OptoelectronicsShenzhen UniversityShenzhen 518060People’s Republic of China shandong Laboratory of Yantai Advanced Materials and Green Manufacturing Yantai 264006People’s Republic of China Key Laboratory of Material Physics School of Physics and MicroelectronicsZhengzhou UniversityMinistry of EducationZhengzhou 450052People’s Republic of China School of Electronics and Information Engineering Shenzhen UniversityShenzhen 518060People’s Republic of China Hoffmann Institute of Advanced Materials Shenzhen PolytechnicShenzhen 518060People’s Republic of China

Single materials that exhibit efficient and stable white-light emission are highly desirable for lighting *** paper reports a novel zero-dimensional perovskite,Rb_(4)CdCl_(6):Sn^(2+),Mn^(2+),which demonstrates exceptional white-light properties including adjustable co.related co.or temperature,high co.or rendering index of up to 85,and near-unity photoluminescence quantum yield of 99%.Using a co.doping strategy involving Sn^(2+)and Mn^(2+),cyan-orange dual-band emission with co.plementary spectral ranges is activated by the self-trapped excitons and d-d transitions of the Sn^(2+)and Mn^(2+)centers in the Rb_(4)CdCl_(6)host,***,although Mn^(2+)ions doped in Rb_(4)CdCl_(6)are difficult to excite,efficient Mn^(2+)emission can be realized through an ultra-high-efficient energy transfer between Sn^(2+)and Mn^(2+)via the formation of adjacent exchange-co.pled Sn–Mn *** from this efficient Dexter energy transfer process,the dual emission shares the same optimal excitation wavelengths of the Sn^(2+)centers and suppresses the non-radiative vibration relaxation ***,the relative intensities of the dual-emission co.ponents can be modulated flexibly by adjusting the fraction of the Sn^(2+)ions to the Sn–Mn *** co.doping approach involving short-range energy transfer represents a promising avenue for achieving high-quality white light within a single material.

关键词： 0D perovskite Multi-ion doping Near-unity white light Energy transfer Self-trapped excitons

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Exhumation History and Exploration Potential of Gold Deposits in the NE Jiaodong Peninsula,North China:Evidence from Apatite and Zirco. Fission Track Thermochronology

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Journal of Earth Science 2023年第3期34卷 776-789页

作者： Yuanlin Chen Huan Li Chaoyang Zheng Safiyanu Muhammad Elatikpo Liu’an Duan Bo Feng Dadou Li Rehan Khan Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring Ministry of EducationSchool of Geosciences and Info-PhysicsCentral South UniversityChangsha 410083China co.lege of Resources and Environmental Engineering Guizhou UniversityGuiyang 550025China Department of Geology Ahmadu Bello University ZariaNigeria Yantai Geological Survey Center of co.stal Zone China Geological SurveyYantai 264004China Xintai Gold and Mining Industry co.Ltd Yantai 265147China No.1 Institute of Geology and Mineral Resources of Shangdong Province Jinan 250100China

As the most important gold producer in China,the Northwest Jiaodong Peninsula is famous for its large gold *** recent years,the disco.ery of gold mineralization has reached a depth of 4000 m below the surface in this *** has attracted significant interest from explorers about the prospecting potential at greater ***,the current deep drilling shows that the prospecting effect in the west portion is better than the region to the *** it imply that there is a difference in prospecting potential between the east and the west?This paper seeks to address the issue through fission track thermochronology on apatite and zirco. to reveal the temperature-time evolution relationship of rock mass and to inverts their thermal evolution *** addition,this study analyzes the transformation of ore deposits after mineralization,quantitatively calculates the uplift-erosion rate of rock mass,and summarizes the preservation law of ore *** on the thermal history simulation of the apatite fission track,our results show that the Guocheng gold belt has experienced three stages of thermal evolution:108-74,74-27,and 27-0 *** uplift and co.ling processes of the threestage tectonic uplift events are the results of multi-stage Pacific plate *** calculated total denudation depth of the gold deposit in the Guocheng gold belt from Cretaceous to the present is about 3.4-5.3 *** metallogenic depth of the ore body in the gold belt is 5.6-8.0 km,which indicates that the ore body in the Guocheng gold belt has suffered a significant degree of *** is speculated that the location with less denudation in the southwest has greater prospecting *** results quantitatively identify the uplift and denudation of the deposit after mineralization,which provides a new theoretical reference for regional mineralization,deep prospecting and exploration.

关键词： Queshan pluton Muniushan pluton thermal history simulation apatite zirco. exhumation magnitude exploration potential gold deposits Guocheng gold belt

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