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Chinese Journal of Chemical Engineering 2023年第1期53卷 170-180页

作者： Lijian Shi Yaping Zhang Yujia Tong wenlong ding Weixing Li State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical EngineeringNanjing Tech UniversityNanjing 211816China

Membrane pollution caused by separating oily wastewater is a big challenge for membrane separation ***,plant-/mussel-inspired interface chemistry has received more and more ***,a high antifouling poly(vinylidene fluoride)(PVDF)membrane,coated with tea polyphenols(TP,extracted from green tea)and 3-amino-propyl-triethoxysilane(APTES),was developed to purify oil-inwater ***-FTIR,XPS and SEM were used to demonstrate the evolution of surface biomimetic hybrid *** performances of the developed membranes were investigated by pure water permeability and oil rejection for various surfactant-stabilized oil-in-water *** experimental results revealed that the membrane deposited with a mass ratio of 0.1/0.2 exhibited ultrahigh pure water permeability(14570 L·m^(-2)·h^(-1)·bar^(-1),1 bar=0.1 MPa)and isooctane-in-water emulsion permeability(5391 L·m^(-2)·h^(-1)·bar^(-1))with high separation efficiency(>98.9%).Even treated in harsh environment(acidic,alkaline and saline)for seven days,the membrane still maintained considerable underwater oleophobic property(148°–153°).The fabricated plant-inspired biomimetic hybrid membranes with excellent performances light a broad application prospect in the field of oily wastewater treatment.

关键词： Plant-inspired chemistry Hierarchical nanoparticles Tea polyphenols Anti-oil adhesion Acid-base-salt resistance

Critical Heat Flux(CHF)Correlations for Subcooled Water Flow Boiling at High Pressure and High Heat Flux

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Journal of Thermal Science 2021年第1期30卷 279-293页

作者： LIU Ping GUO Yusheng ding wenlong TANG Mingyun SONG Yuntao PENG Xuebing JI Jiadong CHEN Qinghua MAO Xin State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines Anhui University of Science and TechnologyHuainan 232001China School of Mechanical Engineering Anhui University of Science and TechnologyHuainan 232001China Anhui Key Laboratory of Mine Intelligent Equipment and Technology Anhui University of Science and TechnologyHuainan 232001China Institute of Plasma Physics Chinese Academy of SciencesHefei 230031China School of Mining and Safety Engineering Anhui University of Science and TechnologyHuainan 232001China

The subcooled water flow boiling is beneficial for removing the high heat flux from the divertor in the fusion reactor,for which an accurate critical heat flux(CHF)correlation is *** to now,there are many CHF correlations mentioned for subcooled water flow boiling in the open ***,the CHF correlations’accuracies for the prediction of subcooled water flow boiling are not satisfactory at high heat flux and high pressure for reactor *** present paper compiled 1356 CHF experimental data points from 15 independent open literatures and evaluated 10 existing CHF correlations in subcooled water flow *** the evaluation,the W-2 CHF correlation performs best for the experimental CHF data in all existing critical heat flux ***,the predicted mean absolute error(MAE)of the W-2 correlation is not very ideal for all database and the MAE of the W-2 correlation is from 30%to 50%for some *** order to enhance the CHF prediction accuracy in subcooled water flow boiling at high heat flux and high pressure,the present paper developed a new CHF *** with other existing CHF correlations,the new CHF correlation greatly enhances the prediction accuracy over a broad range of pressures and heat fluxes which are desired in the cooling of high heat flux devices,such as those in the fusion reactor *** validation results show that the new correlation has a MAE of 10.05%and a root mean squared error(RMSE)of 16.61%,predicting 68.1%of the entire database within±10%and 81.5%within±15%.The MAE of the new CHF correlation is 7.4%less than that of the best existing one(W-2 correlation),further confirming its superior prediction accuracy and ***,the new CHF correlation works well not only for a uniform power profile but also for a non-uniform power profile in subcooled water flow boiling at high pressure and high heat flux.

关键词： reactor divertor correlations subcooled water flow boiling critical heat flux(CHF) high heat flux high pressure

Fracture development in shale and its relationship to gas accumulation

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Geoscience Frontiers 2012年第1期3卷 97-105页

作者： wenlong ding Chao Li Chunyan Li Changchun Xu Kai Jiu Weite Zeng Liming Wu School of Energy China University of GeosciencesBeijing 100083China

Shale with high quartz, feldspar and carbonate, will have low Poisson＇s ratio, high Young＇s modulus and high brittleness. As a result, the shale is conducive to produce natural and induced fractures under external forces. In general, there is a good correlation between fracture development in shale and the volume of brittle minerals present. Shale with high TOC or abnormally high pressure has well-developed fractures. Shale fracture development also shows a positive correlation with total gas accumulation and free gas volume, i.e., the better shale fractures are developed, the greater the gas accumulation and therefore the higher the gas production. Fractures provide migration conduits and accumulation spaces for natural gas and formation water, which are favorable for the volumetric increase of free natural gas. Wider fractures in shale result in gas loss. In North America, there is a high success ratio of shale gas exploration and high gas production from high-angle fracture zones in shale. Good natural gas shows or low yield producers in the Lower Paleozoic marine organic matter-rich rocks in the Sichuan Basin are closely related to the degree of fracture development in brittle shales.

关键词： Shale Fracture Dominant factor Gas accumulation Gas production

Low-frequency electrical stimulation improves neurite outgrowth of dorsal root ganglion neurons in vitro via upregulating Ca^(2+)-mediated brain-derived neurotrophic factor expression

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Neural Regeneration Research 2010年第16期5卷 1256-1260页

作者： Lidan Wan Rong Xia wenlong ding Department of Anatomy Shanghai Jiao Tong University School of Medicine Shanghai 200025 China Department of Anatomy Medical College of Nanchang University Nanchang 330006 Jiangxi Province China

Short-term, low-frequency electrical stimulation of neural tissues significantly enhances axonal regeneration of peripheral nerves following injury. However, little is known about the mechanisms of electrical stimulation to induce neurite outgrowth. In the present study, short-term, low-frequency electrical stimulation, using identical stimulation parameters of in vivo experiments, was administered to in vitro dorsal root ganglion （DRG） neurons. Enhanced neurite outgrowth, as well as synthesis and release of brain-derived neurotrophic factor （BDNF）, were examined in electrical stimulation-treated DRG neuronal cultures. Because the effects of electrical stimulation on neuronal intracellular signaling molecules are less reported, classic calcium intracellular signals are directly or indirectly involved in electrical stimulation effects on neurons. Cultured DRG neurons were pretreated with the calcium channel blocker nifedipine, followed by electrical stimulation. Results suggested that electrical stimulation not only promoted in vitro neurite outgrowth, but also enhanced BDNF expression. However, nifedipine reduced electrical stimulation-enhanced neurite outgrowth and BDNF biosynthesis. These results suggest that the promoting effects of electrical stimulation on DRG neurite outgrowth could be associated with altered calcium influx, which is involved induction of neuronal BDNF expression and secretion.

关键词： electrical stimulation dorsal root ganglion neurons neurite outgrowth brain-derived neurotrophic factor Ca2+ neural regeneration

Effects of dizocipine maleate on mitochondrial ultramicrostructure in neurons following traumatic brain injury in neonatal rats A quantitative time-course analysis

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Neural Regeneration Research 2008年第2期3卷 208-211页

作者： Huiying Zhang Jun Gu wenlong ding Ping Zhu Nursing School of Shanghai Jiao Tong University Shanghai 200025 China Department of Anatomy Medical College of Shanghai Jiao Tong University Shanghai 200025 China Department of Cellbiology Medical College of Shanghai Jiao Tong University Shanghai 200025 China

BACKGROUND： The effects of N-methyl-D-aspartic acid （NMDA） receptor antagonist on neurodegeneration in the immature brain following traumatic brain injury （TBI） are still widely unknown. OBJECTIVE： To study the effects of dizocipine maleate （MK-801）, a non-competitive NMDA receptor antagonist, on mitochondrial ultramicrostructure of neurons in the ipsilateral cingulate cortex and hippocampus after TBI in neonatal rats, and to analyze the optimal time interval of MK-801 administration （1 mg/kg）. DESIGN： Completely randomized controlled study. SETTING： Shanghai Jiao Tong University. MATERIALS： Eight 7-day-old neonatal SD rats, irrespective of gender, were provided by Experimental Animal Center, Medical College of Fudan University. The experiment was approved by a local ethics committee. MK-801 was provided by Sigma. A CM-120 transmission electron microscope （Philips, Holland） was used for tissue analysis. METHODS： This study was performed at the Departments of Anatomy, Neuromorphology, and Biophysics, Medical College of Shanghai, Jiaotong University, between October 2006 and January 2007. Focal models of contusion and laceration of brain were established by the free-falling impact method. Eight rats were randomly divided into a normal control group （n = 2 ） and a MK-801 group （n = 6）. Rats in the normal control group did not receive model establishment and administration, and they were only analyzed by an electron microscope. In the MK-801 group, the cingulate cortex was damaged using a contusion device. MK-801 （1 mg/kg） was intraperitoneally injected 30 minutes before lesion, immediately after lesion, and 30 minutes after lesion （n = 2 for each time point）.MAIN OUTCOME MEASURES： The cingulate cortex and hippocampal tissues from the injured side were removed 24 hours after lesion and routinely processed for analysis of neuronal ultramicrostructure using transmission electron microscopy. RESULTS： Differential therapeutic effects of MK-801 （1 mg/kg） at distinct

关键词： traumatic brain injury neurodegeneration MK-801 ultramicrostructure neonatal rat

基于自选尾数压缩的高能效浮点忆阻存内处理系统

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计算机研究与发展 2022年第3期59卷 533-552页

作者：丁文隆汪承宁童薇华中科技大学计算机科学与技术学院武汉430074 武汉光电国家研究中心(华中科技大学) 武汉430074

矩阵向量乘法(matrix-vector multiplication, MVM)运算是高性能科学线性系统求解的重要计算内核.Feinberg等人最近的工作提出了将高精度浮点数部署在忆阻阵列上的方法,显示出其在加速科学MVM运算方面的巨大潜力.由于科学计算不同类型... 详细信息

矩阵向量乘法(matrix-vector multiplication, MVM)运算是高性能科学线性系统求解的重要计算内核.Feinberg等人最近的工作提出了将高精度浮点数部署在忆阻阵列上的方法,显示出其在加速科学MVM运算方面的巨大潜力.由于科学计算不同类型的应用对于求解精度的要求各不相同,为具体应用提供合适的计算方式是进一步降低系统能耗的有效途径.展示了一种拥有尾数压缩与对齐位优化策略的系统,在实现高精度浮点数忆阻MVM运算这一基本功能的前提下,能够根据具体应用的求解精度要求选择合适的浮点数尾数压缩位数.通过忽略浮点数尾数权重较小的部分低位与冗余的对齐位的阵列激活,减小运算时阵列及外围电路的能耗.评估结果表明:当忆阻器求解相对于软件基线平均分别有0~10;数量级的求解残差时,平均运算阵列能耗与模数转换器能耗相对于已有的优化前的系统分别减少了5%~65%与30%~55%.

关键词：忆阻器阵列模拟矩阵向量乘法高能效科学计算存内并行处理系统稀疏线性代数系统

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非洲东海岸重点盆地油气资源潜力

石油勘探与开发 2013年第5期40卷 543-551页

作者：周总瑛陶冶李淑筠丁文龙中国石油化工股份有限公司石油勘探开发研究院中国地质大学(北京)

基于对非洲东海岸沉积盆地区域构造演化阶段与沉积充填特征的分析,研究各盆地烃源岩、储集层及盖层条件等油气成藏地质条件的差异,分析盆地勘探潜力。非洲东海岸沉积盆地是在前寒武系基底基础上发育起来的叠合盆地,盆内依次充填了晚石... 详细信息

基于对非洲东海岸沉积盆地区域构造演化阶段与沉积充填特征的分析,研究各盆地烃源岩、储集层及盖层条件等油气成藏地质条件的差异,分析盆地勘探潜力。非洲东海岸沉积盆地是在前寒武系基底基础上发育起来的叠合盆地,盆内依次充填了晚石炭世—早侏罗世陆内裂谷陆相沉积层序、中晚侏罗世—早白垩世陆内弱裂谷沉积层序和晚白垩世—新近纪被动大陆边缘海相沉积层序,3套沉积层序中发育不同生、储、盖组合,具有良好的油气勘探前景。通过对拉穆、索马里、坦桑尼亚、鲁伍马、莫桑比克和穆龙达瓦6个重点盆地油气成藏地质条件的综合对比分析,认为坦桑尼亚、鲁伍马和索马里3个盆地油气成藏地质条件优越,优质烃源岩发育,盖层和后期保存条件好,油气勘探潜力较大,莫桑比克盆地为较有利油气勘探盆地,拉穆、穆龙达瓦盆地为不利盆地。

关键词：非洲东海岸油气资源成藏地质条件勘探潜力坦桑尼亚盆地鲁伍马盆地索马里盆地

VIENNA整流器中点电位振荡抑制与平衡控制研究

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中国电机工程学报 2017年第24期37卷 7284-7293+7443页

作者：丁文龙刘家君段彬张承慧山东大学控制科学与工程学院

VIENNA整流器具有结构简单、单位功率因数运行、谐波小等优点,但中点电位不平衡及振荡问题不仅降低电容寿命和系统可靠性,而且会导致电能质量差,甚至造成系统崩溃。为此,提出一种新型中点电位振荡抑制与平衡控制的调制方法。首先根据空... 详细信息

VIENNA整流器具有结构简单、单位功率因数运行、谐波小等优点,但中点电位不平衡及振荡问题不仅降低电容寿命和系统可靠性,而且会导致电能质量差,甚至造成系统崩溃。为此,提出一种新型中点电位振荡抑制与平衡控制的调制方法。首先根据空间矢量等效原理简化零序分量注入调制,分析开关状态对中点电位影响并计算中点电位补偿系数,动态补偿注入的零序分量,最终实现中点电位振荡快速抑制。该方法不仅能够实现中点电位振荡的抑制和平衡控制,而且三相输入电流含有较低谐波。仿真与实验均验证了所提算法的可行性与有效性。

关键词： VIENNA整流器零序分量注入中点电位振荡抑制中点电位平衡控制

基于恒负载下太阳电池自身温度对其发电性能影响的实验研究

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太阳能学报 2015年第8期36卷 1854-1858页

作者：丁文龙朴在林张萌张文基沈阳农业大学信息与电气工程学院沈阳110866

基于分布式太阳发电储热供暖系统,针对多晶硅太阳电池自身温度对其发电性能的影响进行实验研究。在自然条件下对太阳电池加恒阻值的远红外发热纤维软板进行实验,测试其输出电压、输出电流及其对应的光伏电池表面光照强度、太阳电池自身... 详细信息

基于分布式太阳发电储热供暖系统,针对多晶硅太阳电池自身温度对其发电性能的影响进行实验研究。在自然条件下对太阳电池加恒阻值的远红外发热纤维软板进行实验,测试其输出电压、输出电流及其对应的光伏电池表面光照强度、太阳电池自身温度,并对测试数据进行整理、分析,研究太阳电池自身温度对其发电性能的影响。结果表明:太阳电池表面光照强度一定时,随着太阳电池自身温度的升高,太阳电池输出电压、电流及输出功率明显减小,太阳电池的光电转换率呈线性下降趋势。

关键词：储热供暖系统太阳电池自身温度恒阻值输出电压输出电流光电转换效率

新质生产力视域下关键核心技术突破对企业高质量发展的影响

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北京工商大学学报（社会科学版） 2024年第5期39卷 28-41页

作者：宋冬林丁文龙吉林大学吉林长春130012

新质生产力作为科技创新主导下的新生产力形态,是推动经济高质量发展的重要引擎。基于2008—2022年中国A股制造业上市公司专利文本数据和国家出台的相关科技创新规划中划定的关键核心技术明细,运用机器学习自然语言处理方法识别关键核... 详细信息

新质生产力作为科技创新主导下的新生产力形态,是推动经济高质量发展的重要引擎。基于2008—2022年中国A股制造业上市公司专利文本数据和国家出台的相关科技创新规划中划定的关键核心技术明细,运用机器学习自然语言处理方法识别关键核心技术,实证检验了关键核心技术突破对企业高质量发展的影响。研究发现:关键核心技术能够显著推动企业高质量发展,且主要通过提升企业供应链韧性和价值链位势来实现;知识产权保护和市场化程度在关键核心技术推动企业高质量发展过程中发挥了正向调节作用。此外,在高竞争行业企业、国有企业以及高数字化转型程度、高技术多元化程度的企业中,关键核心技术对企业高质量发展的影响更显著。为推动企业高质量发展,政府既要完善关键核心技术创新体系,着力提升产业自主创新能力,又要提高供应链韧性和安全水平,推动企业价值链位势攀升,还要深化知识产权领域体制机制改革,建立以各类经营主体需求为导向的市场环境。

关键词：新质生产力关键核心技术高质量发展供应链韧性价值链位势机器学习