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pH、温度和盐度对单环刺螠消化酶和溶菌酶活力的影响

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水产科学 2017年第2期36卷 138-142页

作者：许星鸿朱晓莹阙义进徐国成徐加涛霍伟甘宏涛冯喜悦淮海工学院海洋生命与水产学院江苏连云港222005

采用L25(56)正交试验法测定了不同pH(6、7、8、9、10)、温度(10、15、20、25、30℃)和盐度(15、20、25、30、35)对体质量为(71.2±8.5)g的单环刺螠肠蛋白酶、淀粉酶、纤维素酶和脂肪酶活力的影响,以及不同盐度对单环刺螠血液溶菌酶活力... 详细信息

采用L25(56)正交试验法测定了不同pH(6、7、8、9、10)、温度(10、15、20、25、30℃)和盐度(15、20、25、30、35)对体质量为(71.2±8.5)g的单环刺螠肠蛋白酶、淀粉酶、纤维素酶和脂肪酶活力的影响,以及不同盐度对单环刺螠血液溶菌酶活力的影响。试验结果表明,单环刺螠肠消化酶活力的最适环境条件分别为,蛋白酶:pH 8、温度30℃、盐度35;淀粉酶:pH 9、温度25℃、盐度25;纤维素酶:pH6、温度30℃、盐度35;脂肪酶:pH 6、温度25℃、盐度30。盐度15和20两组单环刺螠血液溶菌酶活力均先降后升再降,而盐度30和35两组则先升后降。至处理第4d,各试验组溶菌酶活力依次为:盐度30>25>35>20>15,盐度15和20两组溶菌酶活力显著低于盐度较高试验组(P<0.05)。盐度25~35、pH 6~9为单环刺螠适宜的环境条件,高温(25~30℃)下其消化酶活力较高,而低盐度(15~20)下其消化酶活力和免疫能力明显降低。

关键词： pH 温度盐度单环刺螠消化酶溶菌酶

Method of oxygen-enriched two-stage underground coal gasification

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Mining Science and Technology 2011年第2期21卷 191-196页

作者： Liu hongtao Chen feng Pan Xia Yao Kai Liu Shuqin State Key Laboratory of Coal-Based Low Carbon Energy ENN Group Co. Ltd. Langfang 065001 China ENN Coal Gasification Mining Co. Ltd. Langfang 065001 China School of Chemical and Environmental Engineering China University of Mining ＆ Technology Beijing 100083 China

Two-stage underground coal gasification was studied to improve the caloric value of the syngas and to extend gas production times.A model test using the oxygen-enriched two-stage coal gasification method was carried *** composition of the gas produced,the time ratio of the two stages,and the role of the temperature field were *** results show that oxygen-enriched two-stage gasification shortens the time of the first stage and prolongs the time of the second *** oxygen concentrations of 30%, 35%,40%,45%.60%,or 80%gave time ratios（first stage to second stage） of 1：0.12,1：0.21.1：0.51,1：0.64, 1：*** 1：4.0 *** rates of the temperature field after steam injection decreased with time from about 19.1-27.4℃/min to 2.3-6.8℃/*** this rate increased with increasing oxygen concentrations in the first *** caloric value of the syngas improves with increased oxygen concentration in the first *** of 80%oxygen-enriched air gave gas with the highest caloric value and also gave the longest production *** caloric value of the gas obtained from the oxygenenriched two-stage gasification method lies in the range from 5.31 MJ/Nm^3 to 10.54 MJ/Nm^3.

关键词： Underground coal gasification Enriched oxygen Two-stage gasification Temperature field

地震子波分解与重构技术在薄储层预测中的应用

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断块油气田 2024年第2期31卷 319-325页

作者：何幼娟马洪涛邓锋孙力羊丹汪勇金燕林格中国石化西北油田分公司勘探开发研究院新疆乌鲁木齐830011 长江大学地球物理与石油资源学院湖北武汉430100 油气资源与勘探技术教育部重点实验室(长江大学) 湖北武汉430100 中国石化中原油田分公司勘探开发研究院河南濮阳457001 中国石油长庆油田分公司第三采气厂陕西西安710018

T813K-TK715井区是塔河油田的重点含油气井区,多口井在石炭系油气显示活跃,但砂体展布不明。在地震资料上,T813K-TK715井区储层响应特征不明确,且石炭系卡拉沙依组不整合面强反射屏蔽下伏储层反射信息,使得剥蚀线附近地层圈闭难以刻画... 详细信息

T813K-TK715井区是塔河油田的重点含油气井区,多口井在石炭系油气显示活跃,但砂体展布不明。在地震资料上,T813K-TK715井区储层响应特征不明确,且石炭系卡拉沙依组不整合面强反射屏蔽下伏储层反射信息,使得剥蚀线附近地层圈闭难以刻画。文中结合工区地质特征,建立二维地震和楔状地层模型,应用正演模拟技术得到正演模拟结果,利用子波分解与重构技术对正演模拟结果进行处理。结果表明:子波分解与重构技术有效压制了石炭系卡拉沙依组不整合面强反射,削弱了其对下伏砂体反射的屏蔽作用,增强了地层底部反射的连续性,并且提高了地震剖面识别尖灭点的精度,为塔河油田T813K-TK715井区识别强反射屏蔽背景下的薄砂体及地层尖灭点提供了新思路及技术支撑。

关键词：子波分解与重构正演模拟尖灭点识别卡拉沙依组

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基于Co-N-C改性隔膜的高性能锂硫电池

烟台大学学报（自然科学与工程版） 2024年第2期37卷 213-222页

作者：崔洪涛王哲曾涛李婧冯咏梅烟台大学化学化工学院山东烟台264005

设计制备了一种钴嵌入式叶片状氮掺杂碳(Co-N-C)材料改性隔膜用于锂硫电池,借助高分散单质钴提供的活性位点实现对正极侧中间产物多硫化物的化学锚定,抑制其溶解导致的穿梭效应;利用氮掺杂碳材料的微纳结构加快离子传输速率,提高电化学... 详细信息

设计制备了一种钴嵌入式叶片状氮掺杂碳(Co-N-C)材料改性隔膜用于锂硫电池,借助高分散单质钴提供的活性位点实现对正极侧中间产物多硫化物的化学锚定,抑制其溶解导致的穿梭效应;利用氮掺杂碳材料的微纳结构加快离子传输速率,提高电化学反应动力学,使改性隔膜实现吸附-催化协同作用。实验结果表明,采用此改性隔膜组装的锂硫电池,首圈比容量高达1408 mAh/g,且在1 C倍率下稳定循环400圈,衰减率仅为每圈0.05%,电池性能明显提升。

关键词：锂硫电池改性隔膜穿梭效应催化转化

Translation of a spinal bone cement product from bench to bedside

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Bioactive Materials 2022年第4期7卷 345-354页

作者： Fei feng Mengmeng Chen Xuan Wang Hongwei Zhang hongtao Nie Hai Tang Department of Orthopedics Beijing Friendship HospitalCapital Medical UniversityNo.95Yong An RdXi Cheng DistrictBeijing100050China Beijing Bonsci Technology Co Ltd No.1006th Kechuang StreetBeijing Economic and Technological Development AreaBeijing100176China

Spinal acrylic bone cements(ABCs)are used clinically for percutaneous vertebroplasty(PVP)and kyphoplasty(PKP)to treat osteoporotic vertebral compression *** translation of spinal ABC products followed the design control processes including design verification and *** bench to bedside translation of the first Chinese spinal ABC product(Alliment®,namely Alliment Cement)approved by National Medical Products Administration of China was investigated and another commercial product served as the control(Osteopal®V,namely Osteopal V Cement).Results of non-clinical bench performance verification tests of compression,bending and monomer release showed that the newly marketed Alliment Cement is similar to the Osteopal V Cement with properties of both meeting the criteria specified by *** Alliment Cement demonstrated good biocompatibility during the 26 weeks’bone implantation *** cadaver validation tests further revealed that the Alliment Cement satisfied the needs for both PVP and PKP procedures.A post-approval,retrospective clinical investigation further demonstrated the safety and efficacy of the Alliment Cement,with a significant reduction of pain and the improved stability of the fractured vertebral bodies.A successful translation of biomaterial medical products needs close collaborations among academia,industry,healthcare professionals and regulatory agencies.

关键词： Bone cement Spine Translational research Vertebroplasty Kyphoplasty Safety and efficacy

Side chain engineering investigation of non-fullerene acceptors for photovoltaic device with efficiency over 15%

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Science China Chemistry 2020年第12期63卷 1799-1806页

作者： Xin Zhang Yunqian Ding Huanran feng Huanhuan Gao Xin Ke hongtao Zhang Chenxi Li Xiangjian Wan Yongsheng Chen The Centre of Nanoscale Science and Technology and Key Laboratory of Functional Polymer Materials Institute of Polymer ChemistryCollege of ChemistryNankai UniversityTianjin 300071China School of Materials Science and Engineering National Institute for Advanced MaterialsNankai UniversityTianjin 300350China State Key Laboratory of Elemento-Organic Chemistry Nankai UniversityTianjin 300071China Renewable Energy Conversion and Storage Center(RECAST) Nankai UniversityTianjin 300071China

Side chain engineering plays a substantial role for high-performance organic solar cells (OSCs).Herein,a series of non-fullerene acceptor (NFA) molecules with A-D-A structures,TTCn-4F,with gradient substituent lengths of terminal side chains (T-SCs) on the molecular backbones have been designed and *** effects of T-SCs length,ranging from hydrogen atom to n-dodecyl,their optoelectronic properties,thin film molecular packing,blend film morphology,and overall photovoltaic performance have been systematically *** results show that among this series of molecules,TTC8-4F with n-octyl substituent,showed the best photovoltaic performance when applied with PM6 as the donor due to its favorable morphology,balanced charge mobility,effective exciton dissociation and less charge *** on this,its ternary device with F-Br as the secondary acceptor achieved a high PCE of 15.34%with the simultaneously enhanced Voc of 0.938 V,Jscof 22.66 mA cm^-2,and FF of 72.15%.These results indicate that the engineering of T-SCs is an effective strategy for designing high-performance NFAs.

关键词： organic solar cells non-fullerene acceptor side chains

Variation in hydraulic conductivity of fractured rocks at a dam foundation during operation

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Journal of Rock Mechanics and Geotechnical Engineering 2021年第2期13卷 351-367页

作者： Yi-feng Chen Jun Zeng hongtao Shi Yifan Wang Ran Hu Zhibing Yang Chuang-Bing Zhou State Key Laboratory of Water Resources and Hydropower Engineering Science Wuhan UniversityWuhan430072China Key Laboratory of Rock Mechanics in Hydraulic Structural Engineering of the Ministry of Education Wuhan UniversityWuhan430072China China Three Gorges Projects Development Co. Ltd.Chengdu610000China

Characterizing the permeability variation in fractured rocks is important in various subsurface applications,but how the permeability evolves in the foundation rocks of high dams during operation remains poorly *** permeability change is commonly evidenced by a continuous decrease in the amount of discharge(especially for dams on sediment-laden rivers),and can be attributed to fracture clogging and/or hydromechanical *** this study,the permeability evolution of fractured rocks at a high arch dam foundation during operationwas evaluated by inverse modeling based on the field timeseries data of both pore pressure and discharge.A procedure combining orthogonal design,transient flow modeling,artificial neural network,and genetic algorithm was adopted to efficiently estimate the hydraulic conductivity values in each annual cycle after initial reservoir *** inverse results show that the permeability of the dam foundation rocks follows an exponential decay annually during operation(i.e.K/K0=0.97e^(-0.59t)+0.03),with good agreement between field observations and numerical *** significance of the obtained permeability decay function was manifested by an assessment of the long-term seepage control performance and groundwater flow behaviors at the dam *** proposed formula is also of merit for characterizing the permeability change in riverbed rocks induced by sediment transport and deposition.

关键词： Permeability variation Fractured rock Fracture clogging Seepage control Dam engineering

基于MOMA的可重入混合流水车间调度问题研究

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系统仿真学报 2024年第1期36卷 131-148页

作者：秦红斌李晨晓唐红涛张峰武汉理工大学机电工程学院湖北武汉430070 随州武汉理工大学工业研究院湖北随州441300

针对可重入制造系统多具有多品种、大规模、混流生产等特点,构建带批处理机的可重入混合流水车间调度问题(reentrant hybrid flow shop scheduling problem with batch processors,BPRHFSP)模型,提出一种改进的多目标蜉蝣算法(multi-obj... 详细信息

针对可重入制造系统多具有多品种、大规模、混流生产等特点,构建带批处理机的可重入混合流水车间调度问题(reentrant hybrid flow shop scheduling problem with batch processors,BPRHFSP)模型,提出一种改进的多目标蜉蝣算法(multi-objective mayfly algorithm,MOMA)进行求解。提出了单件加工阶段和批处理阶段的解码规则;设计了基于Logistic混沌映射的反向学习初始化策略、改进的蜉蝣交配和变异策略,提高了算法初始解的质量和局部搜索能力;根据编码规则设计了基于变邻域下降搜索的蜉蝣运动策略,优化了种群方向。通过对不同规模大量测试算例的仿真实验,验证了MOMA相比传统算法求解BP-RHFSP更具有效性和优越性。所提出的模型能够反映生产的基础特征,达到减少最大完工时间、机器负载和碳排放的目的。

关键词：可重入混合流水车间生产调度批处理蜉蝣算法碳排放

A series of dithienobenzodithiophene based small molecules for highly efficient organic solar cells

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Science China Chemistry 2017年第4期60卷 552-560页

作者： Huanran feng Miaomiao Li Wang Ni Bin Kan Yunchuang Wang Yamin Zhang hongtao Zhang Xiangjian Wan Yongsheng Chen Centre of Nanoscale Science and Technology and Key Laboratory of Functional Polymer Materials State Key Laboratory and Institute of Elemento-Organic Chemistry Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) College of Chemistry Nankai University Tianjin 300071 China School of Materials Science and Engineering National Institute for Advanced Materials Nankai University Tianjin 300071 China

Three acceptor-donor-acceptor （A-D-A） small molecules DCAODTBDT, DRDTBDT and DTBDTBDT using dithieno[2,3-d：2＇,3＇-d＇]benzo[1,2-b：4,5-b＇]dithiophene as the central building block, octyl cyanoacetate, 3-octylrhodanine and thiobarbituric acid as the end groups were designed and synthesized as donor materials in solution-processed photovoltaic cells （OPVs）. The impacts of these different electron withdrawing end groups on the photophysical properties, energy levels, charge carrier mobility, morphologies of blend films, and their photovoltaic properties have been systematically investigated. OPVs device based on DRDTBDT gave the best power conversion efficiency （PCE） of 8.34%, which was significantly higher than that based on DCAODTBDT （4.83%） or DTBDTBDT （3.39%）. These results indicate that rather dedicated and balanced consideration of absorption, energy levels, morphology, mobility, etc. for the design of small-molecule-based OPVs （SM-OPVs） and systematic investigations are highly needed to achieve high performance for SM-OPVs.

关键词： acceptor-donor-acceptor dithieno[2,3-d:2',3'-d']benzo[1,2-b:4,5-b']dithiophene solution-processed photovoltaic cells endacceptor moieties