检索结果-南通市图书馆

基于数字化技术的FPSO油气生产化学药剂优化研究

在线全文

学校读者我要写书评

暂无评论

自动化应用 2024年第8期65卷 195-197页

作者：陈长钦孙海防刘雪松刘东辉陈晓刘昊仝英利中海油能源发展股份有限公司采油服务分公司天津300452

在FPSO生产中,研究生产优化可以提高生产效率、增强安全性、降低环境影响、促进技术水平的提升,并为决策提供科学依据,为此,提出基于数字化技术的FPSO油气生产化学药剂优化方法。通过数字化技术实时数据捕获处理FPSO生产数据,并对采集... 详细信息

在FPSO生产中,研究生产优化可以提高生产效率、增强安全性、降低环境影响、促进技术水平的提升,并为决策提供科学依据,为此,提出基于数字化技术的FPSO油气生产化学药剂优化方法。通过数字化技术实时数据捕获处理FPSO生产数据,并对采集的数据进行预处理、清洗以及归一化。结合PID调节器设计化学药剂加注优化控制,实现基于数字化技术的FPSO油气生产化学药剂优化。结果显示,该方法的平均油水分离率高,化学药剂消耗降低,实际应用效果好。

关键词：数字化技术 FPSO生产工艺流程

在线全文

学校读者我要写书评

暂无评论

海洋平台多相流量计技术现状及发展趋势

天津科技 2024年第8期51卷 53-57页

作者：仝英利刘昊陈长钦萧阳刘东辉孙海防中海油能源发展股份有限公司采油服务分公司天津300452

多相流量计是计量油、气、水三相产量数据的重要设备,目前在海洋平台应用的多相流量计种类繁多,其计量原理不同,计量精度和具体应用场景也不同。根据计量原理,将现有多相流量计分为三大类,即分离式多相流量计、放射技术非分离多相流量... 详细信息

多相流量计是计量油、气、水三相产量数据的重要设备,目前在海洋平台应用的多相流量计种类繁多,其计量原理不同,计量精度和具体应用场景也不同。根据计量原理,将现有多相流量计分为三大类,即分离式多相流量计、放射技术非分离多相流量计和无放射非分离多相流量计,通过分析现有多相流量计技术存在的不足,结合目前海洋平台现场实际需求,展望未来技术发展趋势。

关键词：多相流量计油气水技术现状海上生产发展趋势

牛支原体能量耦合因子转运蛋白S组件Mb BioY摄取外源生物素的功能分析

在线全文

学校读者我要写书评

暂无评论

畜牧兽医学报 2024年第1期55卷 282-289页

作者：陈启伟权衡陈胜利刘东慧于永峰李彩玉宫晓炜储岳峰中国农业科学院兰州兽医研究所/兰州大学动物医学与生物安全学院动物疫病防控全国重点实验室甘肃省病原生物学基础学科研究中心兰州730046

牛支原体(***)感染与生存依赖于外界微环境提供的各类营养代谢因子。开展***外源生物素摄取的机制研究,将对***防控具有极其重要的意义。通过对*** PG45 Mb BioY(MBOVPG45_0349)基因进行系统发育分析、分子对接分析,筛选*** PG45 Mb Bio... 详细信息

牛支原体(***)感染与生存依赖于外界微环境提供的各类营养代谢因子。开展***外源生物素摄取的机制研究,将对***防控具有极其重要的意义。通过对*** PG45 Mb BioY(MBOVPG45_0349)基因进行系统发育分析、分子对接分析,筛选*** PG45 Mb BioY突变株,比较PG45和PG45ΔMb BioY的生物素敏感性,异源构建Mb BioY功能性克隆验证其功能。结果表明,PG45染色体上存在一种崭新的生物素膜转运蛋白,全长996 bp,GC含量30.95%,蛋白长度为332个氨基酸,是由7个跨膜结构域组成的能量偶合因子(ECF)转运蛋白S成分Mb BioY。进一步验证后发现,当***缺失Mb BioY会影响其生长,表现出生物素代谢营养缺陷的表型。通过异源敲入生物素代谢营养缺陷大肠杆菌MG1655,表明Mb BioY单独存在时,就能够恢复生物素代谢营养缺陷大肠杆菌缺失株的生理功能。初步证明,Mb BioY编码的是能量偶合因子(ECF)转运蛋白的S成分具有摄取外源生物素的能力,该研究结果将补充细菌生物素代谢调控的多样性和复杂性,为***的有效防控提供独特视角。

关键词：牛支原体能量耦合因子转运体生物素转运

新疆巴楚小海子岩体铁钛成矿特征及资源利用前景

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

矿床地质 2024年第1期43卷 29-42页

作者：李立兴陈懋弘李厚民杨成栋杨富全陈港任程昊唐文浩安鹏刘东辉中国地质科学院矿产资源研究所自然资源部成矿作用与资源评价重点实验室北京100037 昆明理工大学国土资源工程学院云南昆明650093 中国地质大学(北京) 地球科学与资源学院北京100083

新疆巴楚小海子是近年来在塔里木大火成岩省探获的一个低品位-大吨位岩浆型钒钛磁铁矿床,其成岩成矿机制以及资源利用前景尚不清楚。文章针对小海子岩体2种含矿岩相橄榄辉长岩和橄榄辉石岩开展了地质地球化学研究。橄榄辉长岩相和橄榄... 详细信息

新疆巴楚小海子是近年来在塔里木大火成岩省探获的一个低品位-大吨位岩浆型钒钛磁铁矿床,其成岩成矿机制以及资源利用前景尚不清楚。文章针对小海子岩体2种含矿岩相橄榄辉长岩和橄榄辉石岩开展了地质地球化学研究。橄榄辉长岩相和橄榄辉石岩相虽然在空间上关系不明,但岩相学观察表明它们矿物组成的差异与矿物堆晶作用有关,且二者具有相似的稀土元素球粒陨石标准化和微量元素原始地幔标准化配分曲线,说明是同源岩浆演化的产物,橄榄石较低的Fo值(67.9~72.5)指示幔源母岩浆在深部岩浆房中发生了分异。小海子岩体和与相距约45 km的瓦吉里塔格相比,岩石组成和地球化学组成相似,表明为同源岩浆成因,但后者矿物组成变化范围更大,指示瓦吉里塔格岩体在形成过程中经历了更高程度的分离结晶作用,这可能是造成瓦吉里塔格岩体比小海子岩体的w(TiO_(2))更高的原因。小海子岩体虽然w(TiO_(2))较低(3%~4%),但铁钛氧化物固溶体分离结构不发育,且矿物颗粒粗大,使得铁和钛选矿解离比中国其他地区的钒钛磁铁矿更为容易,因此钛资源利用前景巨大,笔者建议出台地方性的勘查技术规范,为这类铁钛资源的开发利用提供技术标准。

关键词：钒钛磁铁矿镁铁-超镁铁质岩体资源利用前景小海子塔里木大火成岩省新疆

Improved dispersion performance and interfacial compatibility of covalent-grafted MOFs in mixed-matrix membranes for gas separation

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

Green Chemical Engineering 2021年第1期2卷 86-95页

作者： Chongqing Wang Guangjie Ren Kaifeng Wei donghui liu Tingting Wu Jinlong Jiang Junfeng Qian Yichang Pan College of Chemical Engineering State Key Laboratory of Materials-Oriented Chemical EngineeringNanjing Tech UniversityNanjing210009China Key Laboratory for Palygorskite Science and Applied Technology of Jiangsu Province Faculty of Chemical EngineeringHuaiyin Institute of TechnologyHuaian223003China Jiangsu Province Key Laboratory of Fine Petrochemical Engineering Changzhou UniversityChangzhouJiangsu ProvinceChina

Mixed-matrix membranes(MMMs)have received much attention due to their processable advantages of polymer and high permeability and/or selectivity of porous metal-organic frameworks(MOFs)***,the interfacial defects caused by poor interaction between MOFs with polymers and the agglomeration phenomenon caused by uneven dispersion of MOFs are common problems in mixed-matrix ***,the priming protocol is one of solutions to the above problems,but it cannot precisely regulate the dispersion of particles and the interfacial compatibility between two ***,covalent grafting of polyimide 6FDA-Durene onto the surface of UiO-66-NH2 can mitigate the aggregation of fillers inside the polymeric matrices and improve the interfacial interaction between two phases,thus significantly improving the CO_(2)/CH_(4)separation performance on the as-synthesized *** explored gas transport mechanism indicated that the improved separation was due to the raise of solubility ***,the stronger covalent bond between fillers and polyimide than physical interaction of priming protocol also endows the improved anti-plasticization phenomenon for CO_(2)/CH_(4)separation.

关键词： Mixed-matrix membrane MOFs Priming Covalent grafting Interfacial compatibility

在线全文

学校读者我要写书评

暂无评论

过氧化氢气体检测仪校准技术初探

计量与测试技术 2024年第4期51卷 123-125页

作者：李钢余勇章郝维涛刘东晖徐晓华广东省中山市质量计量监督检测所成都市计量检定测试院烟台市标准计量检验检测中心

过氧化氢气体具有优异的灭菌效果,被广泛应用于各行各业,但其检测仪缺乏有效校准技术和方法。由于该气体稳定性较差,因此,本文根据各种应用条件下的浓度限值规定、传感器类型和量程,分析了校准技术的不足,研制了过氧化氢气体高效动态校... 详细信息

过氧化氢气体具有优异的灭菌效果,被广泛应用于各行各业,但其检测仪缺乏有效校准技术和方法。由于该气体稳定性较差,因此,本文根据各种应用条件下的浓度限值规定、传感器类型和量程,分析了校准技术的不足,研制了过氧化氢气体高效动态校准装置,并进行实验验证。结果表明:标准装置的示值误差较小,可为该检测仪的校准技术提供参考。

关键词：过氧化氢气体气体检测仪动态校准装置二氧化硫气体

Pinpointing Source of Mekong and Measuring Its Length Through Analysis of Satellite Imagery and Field Investigations

在线全文

学校读者我要写书评

暂无评论

Geo-Spatial Information Science 2007年第1期10卷 51-56页

作者： liu Shaochuang LU Pingli liu donghui JIN Peidong Institute of Remote Sensing Applications Chinese Academy of Sciences 3 Datun Road Chaoyang District Beijing 100101 China.

For centuries, explorers and scientists from different countries had made their own conclusions on the source of the Mekong. However, the geographic source of the Mekong is still arguable because of the complexity of the Mekong source water system, inaccessible environment and the varied technologies used by those explorers and scientists. The satellite remote sensing technology has been used to pinpoint the source of the Mekong, associated with the on-the-spot investigations made by the authors in June 1999 and September 2002. The actual length of the Mekong has also been calculated.

关键词： source of Mekong satellite imagery field investigation

A green cross-linking method for the preparation of renewable threedimensional graphene sponges for efficient adsorption of Congo red dye

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Engineering 2024年第2期66卷 84-93页

作者： Zhuang liu Bo Gao Haoyuan Han Yuling Li Haiyang Fu donghui Wei Key Laboratory for Ecological Metallurgy of Multimetallic Mineral(Ministry of Education) Northeastern UniversityShenyang 110819China

Graphene-based materials possess significant potential for the treatment of dye wastewater due to their exceptional adsorption properties toward stubborn ***,their utilization is hindered by high preparation costs,low yields,environmental pollution during synthesis,and challenges in regenerating the *** study proposes a novel approach to address these limitations by developing nitrogen-doped three-dimensional(3D)polyvinyl alcohol(PVA)crosslinked graphene sponges(N-PGA)using a cross-linking method with ammonium *** method offers a relatively mild,environmentally friendly *** carbonate serves as both a reducing and modifying agent,facilitating the formation of the intrinsic structure of N-PGA and acting as a nitrogen ***,PVA is utilized as the cross-linking *** results demonstrate that N-PGA exhibits a favorable internal 3D hierarchical porous structure and possesses robust mechanical *** measured specific surface area(BET)of N-PGA was as high as406.538 m^(2)·g^(-1),which was favorable for its efficient adsorption of Congo red(CR)dye *** an initial concentration of 50 mg·L^(-1),N-PGA achieved an impressive removal rate of 89.6%and an adsorption capacity of 112 mg·g^(-1)for CR ***,it retained 79%of its initial adsorption capacity after 10 cycles,demonstrating excellent regeneration *** summary,the synthesized N-PGA displays remarkable efficacy in the adsorption of CR dye in wastewater,opening up new possibilities for utilizing 3D porous graphene nanomaterials as efficient adsorbents in wastewater treatment.

关键词： Green chemistry Graphene sponge Adsorbents Adsorption Congo red Regeneration

Dynamically Securing the Data by^(1)O_(2)Sensitization of Fluorescent Composites with a High Latency and Uncrackable Features

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemistry 2024年第14期42卷 1651-1658页

作者： Yuanyuan Chen Jiamao Chen Huacan Wu Yifan liu donghui Wang Weiguo Huang College of Chemistry and Materials Science Fujian Normal UniversityFuzhouFujian350002 China State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of Sciences155 Yangqiao West RoadFuzhouFujian350002 China University of Chinese Academy of Sciences 19A Yuquan RoadBeijing100049 China

Dynamic fluorescent materials play a crucial role in secure inks for data encryption;however,they are still plagued by issues such as photodegradation,poor latency,and susceptibility to unauthorized ***,we propose a photochemically modulated dynamic fluorescent encryption system based on^(1)O_(2)sensitization of fluorescent composites,comprising a^(1)O_(2)-sensitive fluorophore(F2)and non-emissive *** UV irradiation,in-situ generated^(1)O_(2)from the polymer effectively binds with F2 to form endoperoxides(F2EPO),resulting in a significant redshift in emission,up to 150 ***^(1)O_(2)concentration is closely related to the irradiation time,rendering different fluorescent colors in a time-gated ***,the emission of F2EPO can be regulated by polymer chemical structure,molecular weight,and crosslinking *** on these merits,we develop a dynamic data encryption method with various non-emissive polymers as the data storage media,UV light irradiation as the data encoder,and F2 as the data *** light irradiation of diverse polymer solutions generates^(1)O_(2)at different concentrations,effectively encoding the data,which remains invisible under both UV and natural *** addition of F2 to these irradiated polymer solutions produces different redshifted fluorescence,enabling secure data *** to the non-emissive nature of the polymers,time-gated readout fashion,excellent latency of^(1)O_(2),and subtle interactions between^(1)O_(2)and F2,this data encryption is nearly *** work offers an advantage data encryption approach beyond the reach of conventional fluorophores.

关键词： Dynamic fluorescent materials Photochemically modulation ^(1)O_(2)-sensitive fluorophore High latency Data encryption Fluorescence Photochemistry Singlet oxygen