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致密砂岩气储层多尺度“地质-工程”双甜点评价新方法

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天然气工业 2023年第6期43卷 76-86页

作者：朱海燕龚丁张兵油气藏地质及开发工程全国重点实验室•成都理工大学中联煤层气有限责任公司

勘探开发实践证实水平井分段体积压裂是致密砂岩气储层开发的关键技术,其中储层甜点是井位部署和储层压裂分段和射孔位置优选的主要依据,但由于致密砂岩气储层通常为砂泥岩不等厚互层,天然裂缝展布情况与地应力状态复杂,且“地质—工程... 详细信息

勘探开发实践证实水平井分段体积压裂是致密砂岩气储层开发的关键技术,其中储层甜点是井位部署和储层压裂分段和射孔位置优选的主要依据,但由于致密砂岩气储层通常为砂泥岩不等厚互层,天然裂缝展布情况与地应力状态复杂,且“地质—工程”双甜点识别精度低、重合度低、压裂改造参数优化缺乏依据。为此,基于地质—工程一体化思路,建立了考虑全烃含量、储层孔隙度等因素的地质甜点预测模型,提出了考虑岩性、破裂形态、断裂力学特征、扩容剪胀效应等因素的多尺度三维工程甜点评价新方法,随后形成了致密砂岩气储层“地质—工程”双甜点评价新模型。最后,以鄂尔多斯盆地临兴地区致密砂岩气田为例,建立了多尺度三维双甜点模型,并优选两口井,对其双甜点剖面与施工压力和改造体积进行对比分析。研究结果表明:①剪胀角对研究区域工程甜点分布影响最大,其次为耗散能、弹性模量和断裂能;②高地质甜点段并不一定是页岩气高产段;③高工程甜点段施工压力相对较低,改造相对充分;④优质地质甜点与优质工程甜点在空间位置上一致性较差。结论认为,致密砂岩气储层的改造应以地质甜点为基础,工程甜点为核心,综合考虑双甜点的分布,该多尺度“地质—工程”双甜点评价新方法为致密砂岩气储层甜点预测及开发方案的优化提供了重要技术支撑。

关键词：致密砂岩气储层复杂地质条件多尺度地质工程一体化双甜点评价扩容剪胀效应布井井眼轨迹射孔位置压裂设计优化

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Plasma-assisted fabrication of monolayer phosphorene and its Raman characterization

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Nano Research 2014年第6期7卷 853-859页

作者： Wanglin Lu haiyan Nan Jinhua Hong Yuming Chen Chen zhu Zheng Liang Xiangyang Ma Zhenhua Ni Chuanhong Jin Ze Zhang State Key Laboratory of Silicon Materials Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Province Department of Materials Science and Engineering Zhejiang University Hangzhou 310027 China department of Physics Southeast University Nanjing 211189 China Graphene Research and Characterization Center Taizhou Sunano New Energy Co. Ltd. Taizhou 225300 China

There have been continuous efforts to seek novel functional two-dimensional semiconductors with high performance for future applications in nanoelectronics and optoelectronics. In this work, we introduce a successful experimental approach to fabricate monolayer phosphorene by mechanical cleavage and a subsequent Ar＊ plasma thinning process. The thickness of phosphorene is unambiguously determined by optical contrast spectra combined with atomic force microscopy （AFM）. Raman spectroscopy is used to characterize the pristine and plasma-treated samples. The Raman frequency of the A2. mode stiffens, and the intensity ratio of A2. to Alg modes shows a monotonic discrete increase with the decrease of phosphorene thickness down to a monolayer. All those phenomena can be used to identify the thickness of this novel two-dimensional semiconductor. This work on monolayer phosphorene fabrication and thickness determination will facilitate future research on phosphorene.

关键词： Mechanical cleavage monolayer phosphorene two-dimensionalsemiconductor plasma thinning optical contrast Raman spectroscopy

Relationship between the stoichiometric characteristics and leaf functional traits of Castanopsis hystrix in different ages

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林业与环境科学 2020年第2期36卷 1-6页

作者： Zhang Zhongrui Qi Ye ding Xiaogang Yang haiyan Wei Dan Zhang Geng {2. Hangyong Chen Li Guangdong Provincial Key Laboratory of Silviculture Protection and Utilization/Guangdong Academy of ForestryGuangzhouGuangdong 510520China

Both the stoichiometric characteristics and leaf functional traits can reflect the adaptability of plants to changes in the external living *** particular,for varying aged forest plants,the study of stoichiometric characteristics and leaf functional traits can reflect the plant’s life history strategy and its resource investment and allocation *** this paper,the 1.5-year-old,5-year-old,15-year-old and 2.-year-old Castanopsis hystrix were selected as the research objects to investigate the trends of stoichiometry and leaf functional traits,and their synergistic changes were *** results showed that with the increase of age,the stability of *** stoichiometry gradually increased,and the functional traits also tended to invest in ***,there was no synergistic change between the two,which might be attributed to the different sensitivity of the *** leaf to the environment at the life history level of 1.5-year-old to 2.-year-old.

关键词： Castanopsis hystrix different age stoichiometry leaf functional traits

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复合材料表面缺陷的超声扩散场定位

声学学报 2020年第6期45卷 922-928页

作者：朱琦丁钰轩张海燕屠大维上海大学机电工程与自动化学院上海200444 上海大学通信与信息工程学院上海200444

传统超声检测多使用直达波进行检测,但在各向异性、非均匀的复杂结构检测中存在诸多限制。将超声波在此类多重散射介质中的传播近似为扩散过程,探索采用超声扩散场信号进行复合材料表面缺陷的检测定位。在此过程中形成的扩散场能对介质... 详细信息

传统超声检测多使用直达波进行检测,但在各向异性、非均匀的复杂结构检测中存在诸多限制。将超声波在此类多重散射介质中的传播近似为扩散过程,探索采用超声扩散场信号进行复合材料表面缺陷的检测定位。在此过程中形成的扩散场能对介质密集采样,对缺陷的出现高度敏感。针对铺层结构为[0°/90°]12.碳纤维增强环氧树脂基复合材料板,基于Locadiff方法建立表面缺陷定位的理论模型,开展缺陷出现前后波形的理论不相关性计算。结合实验求解扩散系数,开展检测信号的不相关性分析。最后利用反演计算的模型给出缺陷的定位结果。结果表明,当缺陷直径为10 mm时,定位误差为6.99%;当缺陷直径为5 mm时,定位误差为9.2.%,可以实现复合材料表面缺陷的定位。

关键词：扩散场超声检测缺陷定位结构检测多重散射扩散过程检测定位表面缺陷

Assessment of Forest Soil Fertility in Yunfu City based on Grey Correlation

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林业与环境科学 2019年第6期35卷 16-21页

Due to the spatial heterogeneity of forest soil,it is a difficult problem to evaluate the forest soil fertility on a large *** study conducted a grid survey of forest soil in Yunfu City,Guangdong Province,and used the the gray correlation system to evaluate forest soil fertility in each *** results showed that the effect of using the gray correlation analysis to evaluate soil fertility in Yunfu city was ideal,and the fertilizer strength in each county was in order of Yunan,Yun'an,Yuncheng,Xinxing,and *** results can provide an appropriate scientific basis for forestry division within the county scale.

关键词： grey correlation forest soil fertility Yunfu City

Fungal diversity and mycotoxins identification of mouldy rapeseed in china

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Oil Crop Science 2017年第1期2卷 38-48页

作者： Linxia Wu haiyan Zhou Tingting zhu Hongling Yang Xueli Dong Lin Chen Yizhen Bai Nanri Yin Xiaoxia {2. Peiwu Li Oil Crops Research Institute Chinese Academy of Agricultural Sciences Wuhan China Laboratory of Quality & Safety Risk Assessment for Oilseed Products (Wuhan) Ministry of Agriculture Wuhan China Key Laboratory of Detection for Mycotoxins Ministry of Agriculture Wuhan China Key Laboratory of Biology and Genetic Improvement of Oil Crops Ministry of Agriculture Wuhan China Quality Inspection & Test Center for Oilseed Products Ministry of Agriculture Wuhan China

Investigation on fungal populations and mycotoxins of mouldy rapeseed was conducted in this paper. A total of 578 rapeseed samples were collected from 11 Chinese provinces in 2.15, and 141 samples were contaminted by mycete. Mouldy rapeseed samples with exceeding specified standard were found in all areas. The highest percentages of samples were from Hunan, Jiangxi and Hubei provinces with above standard rate of 31.91%, 2..54% and 2..45% respectively. Mycete in 2. severely mouldy samples were isolatedand determined by using dilution method. Eighty-three dominant isolates were found,among which fungal strain number ranged from 1 to 8. Aspergillus flavus, Penicillium steckii and Penicillium citrinum were dominant myco-populations identified by morphological and molecular biological methods. Rapeseed from the Southern provinces including Jiangxi,Hunan and Guangxi were contaminated by more isolates. Mycotoxins content were evaluated by LC–MS/MS. AFB1, BEA and FB1 were the top 3 prevalent mycotoxins. BEA and FB1 contaminations in rapeseed were relatively low. This investigation provid support for protecting public health and ensuring consumption security of rapeseed.

关键词： rapeseed fungal diversity mycotoxin

TECHNOLOGY CONTROL IN THE BRIGHT QUENCH PROCESS WITH THE MESH-BELT FURNACE

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TECHNOLOGY CONTROL IN THE BRIGHT QUENCH PROCESS WITH THE MES...

1973—2.13年上海市徐汇区甲状腺癌发病趋势和生存分析

2.06年中国机械工程学会年会暨中国工程院机械与运载工程学部首届年会

作者： ding Hao, zhu Shigen, CHEN {2., BAO Zhenghong School of Mechanical Engineering, Donghua University, No.12.5, West Yan’an Road, Shanghai, Postcode: 2.0051,P. R. china

Mesh-belt furnace is a continuous heat treatment devicewidely used in the bright quench for the small articles withlarge pitch. The state parameters determining the heattreatment quality can not be co

关键词： Mesh-belt furnace state parameters technologycontrol.

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中国癌症杂志 2016年第6期26卷 508-513页

作者：顾海雁朱菁丁建辉上海市徐汇区疾病预防控制中心慢病防治科上海200237 复旦大学附属肿瘤医院放射诊断科复旦大学上海医学院肿瘤学系上海200032

背景与目的：近年来甲状腺癌发病率的迅速上升引起了广泛关注,可能与生活方式、老龄化和诊断技术水平提高等相关。本研究采用41年的甲状腺癌发病和随访资料,描述和分析上海市徐汇区居民甲状腺癌发病趋势及生存情况。方法：甲状腺癌发病... 详细信息

背景与目的：近年来甲状腺癌发病率的迅速上升引起了广泛关注,可能与生活方式、老龄化和诊断技术水平提高等相关。本研究采用41年的甲状腺癌发病和随访资料,描述和分析上海市徐汇区居民甲状腺癌发病趋势及生存情况。方法：甲状腺癌发病资料来自上海市肿瘤登记报告系统,发病时间覆盖1973—2.13年,用1973年人口构成计算标化发病率,采用自然样条回归模型分析甲状腺癌发病趋势,平均年度变化百分比（annual percentage change,APC）计算采用美国国立癌症研究所Jointpoint软件,生存率估计采用Kaplan-Meier法。结果：甲状腺癌的病理类型以乳头状癌为主（69.8%）,1973.1978年和2.09—2.13年女性标化发病率分别是男性的2.51倍和2.70倍,男性发病年龄为（50.04±14.71）岁,女性发病年龄为（48.57±13.65）岁。去除老龄化因素,1981年以来甲状腺癌标化发病率呈上升趋势,1981—2.04年平均每年上升8.46%（95%CI：5.9%-11.1%）,2.04—2.13年快速增长,平均每年上升2..30%（95%CI：9.8%-31.7%）。甲状腺癌总体预后较好,2.03—2.13年5年生存率达95.2.%,10年生存率89.09%;41年生存分析显示,女性生存率高于男性（χ^2.15.43,P=0.000 1）。结论：甲状腺癌在徐汇区的增长趋势与上海市及其他发达国家情况相似,虽然死亡率低,但发病率增长迅速,提示进一步研究相关危险因素,为制定防治策略打下基础。

关键词：甲状腺癌发病趋势年度变化百分比生存率

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关于S-投射模

四川师范大学学报（自然科学版） 2015年第6期38卷 846-850页

作者：张永亮丁南庆安康学院数学与统计系陕西安康725000 南京大学数学系江苏南京210093

设R为任意的幺环.Azumaya将投射模的概念推广到S-投射模.文献(zhu S L.J Algebra,1991,139:2.5-2.1.)讨论了在什么样的环上,平坦模是f-投射的.文献(Mao L *** Residents J Math,2.07(12.:501-512.)给出了内射模都是S-投射的环.讨论S-投射模和其他模的关系,如投射模、平坦模、拟内射模、可除模、S-平坦模等,并证明了S-投射模关于直和的封闭性.

关键词： S-投射模平坦模 S-平坦模