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Idiopathic phacodonesis in senile cataract patients in Qinghai,China

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International Journal of Ophthalmology(English edition) 2011年第5期4卷 508-512页

作者： Xiao-Wei Liu, rui-fang Sui Department of Ophthalmology Peking Union Medical College Hospital Chinese Academy of Medical Sciences & Peking Union Medical College Beijing 100730 China Department of Ophthalmology Beijing Hospital Beijing 100730 China Department of Anesthesiology Peking Union Medical College Hospital Chinese Academy of Medical Sciences & Peking Union Medical College Beijing 100730 China

AIM: To investigate the frequency of idiopathic phacodonesis (IP) in senile cataract subjects and the short-term clinical outcomes following cataract surgery. METHODS: This institutional case-control study included 1301 consecutive low-income cataract subjects from June to November 2009. Anterior segment were carefully evaluated with dilated pupil under slit-lamp. IP were screened and graded by a criteria set by the authors. Risk factors, surgical outcomes, and operative complications were analyzed. RESULTS:A total of 42 subjects (3.2%) with IP were diagnosed and classified as grade 1 (36 subjects), grade 2 (5 subjects) and grade 3 (1 subject). Harder lenses and intumescent cataracts were observed in the IP group than the control group (P <0.05). Logistics regression test also indicated the main risk factor was the hardness of the lens. The incidence of zonular dialysis during surgery was 23.8% (10 eyes), which was significantly higher than the controls (0.7%, ( P<0.001). Visual outcomes of the two groups were not statistically or clinically significant. CONCLUSION: Hard nucleus and intumescent cataract are related to IP in senile cataract subjects in Qinghai, China. With more care being taken, grade 1 and some of the grade 2 IP subjects achieved similar surgical outcomes as compared to controls.

关键词： phacodonesis lens nucleus zonular dialysis

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磷酸铁系电池正极材料生产废水处理工程实例

中国给水排水 2024年第8期40卷 130-136页

作者：陈侃张志浩叶超房睿王琦张琨马楫郑彤哈尔滨工业大学环境学院黑龙江哈尔滨150001 苏州苏净环保工程有限公司江苏苏州215000 哈尔滨工业大学水资源国家工程研究中心有限公司黑龙江哈尔滨150001 广东粤海水务投资有限公司广东深圳518000

某动力电池用磷酸铁系正极材料生产企业排放的炉窑废水与尾气喷淋废水水量为15 m^(3)/d,该废水含有大量呋喃、有机胺、噻唑等高浓度含硫含氮有机污染物及悬浮物,可生化性差,处理成本高。采用混凝沉淀+单效蒸发+刮板滚筒干燥将有机废水... 详细信息

某动力电池用磷酸铁系正极材料生产企业排放的炉窑废水与尾气喷淋废水水量为15 m^(3)/d,该废水含有大量呋喃、有机胺、噻唑等高浓度含硫含氮有机污染物及悬浮物,可生化性差,处理成本高。采用混凝沉淀+单效蒸发+刮板滚筒干燥将有机废水中大部分悬浮物、COD、氨氮、总氮固定进入固废中去除,随后与150 m^(3)/d经混凝沉淀的厂区生产循环冷却水排水混合稀释,再通过AO+MBR生化处理进一步脱氮并去除有机物。该项目投资1200万元,建成后有机废水处理费较原委外处理方式降低77.2%。运行结果显示,该组合工艺对COD、氨氮、总氮的平均去除率分别达到99.79%、99.87%、99.90%,最终出水指标稳定在COD≤200 mg/L、氨氮≤40 mg/L、总氮≤60 mg/L,满足《无机化学工业污染物排放标准》(GB/T 31573—2015)的间接排放标准。

关键词：动力电池炉窑废水尾气喷淋废水磷酸铁系正极材料蒸发干燥生化处理

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再生水利用配置的基本要素与理论模型研究

自然资源学报 2024年第6期39卷 1450-1472页

作者：韩宇飞吴凤平王维季英雯王瑞方王晓宇河海大学商学院南京211100 河海大学商学院规划与决策研究所南京211100

再生水利用配置是推动再生水高效利用的重要手段。针对中国再生水配置理论的欠缺,在总结美国、日本、新加坡、以色列等典型国家再生水利用配置主要经验的基础上,提出中国再生水利用配置的三个基本要素:再生水价格机制、再生水供需状况... 详细信息

再生水利用配置是推动再生水高效利用的重要手段。针对中国再生水配置理论的欠缺,在总结美国、日本、新加坡、以色列等典型国家再生水利用配置主要经验的基础上,提出中国再生水利用配置的三个基本要素:再生水价格机制、再生水供需状况以及再生水配置关系;针对核心要素,构建再生水利用配置的理论模型:一是基于再生水利用成本、供需双方再生水影子价格构建再生水综合价格模型,二是基于再生水需求主体、再生水需求驱动因素构建再生水需求总量预测模型,三是基于“自上而下”的目标要求建立再生水利用配置的区间双层规划模型,以实现“地区—行业”不同层级的再生水配置。本研究旨在完善再生水利用配置理论,为推动污水资源化利用提供决策参考。

关键词：再生水利用配置再生水价格再生水供需状况再生水配置关系区间双层规划模型

夹层型页岩油突破及其油气地质意义——以四川盆地中部G119H井为例

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天然气工业 2024年第3期44卷 53-63页

作者：郭贵安唐青松蒋裕强朱讯方锐周亚东洪海涛张连进张新宇中国石油西南油气田公司西南石油大学地球科学与技术学院中国石油非常规油气重点实验室储层评价实验室中国石油西南油气田公司勘探开发研究院中国石油西南油气田公司开发事业部

近期,中国石油西南油气田公司在四川盆地中部(以下简称川中)公山庙西地区部署实施的侏罗系凉高山组夹层型页岩油重点评价井——G119H井,测试获产油20 t/d、产气0.6×10^(4) m^(3)/d,取得了该盆地湖相夹层型页岩油的新突破。为了进一步... 详细信息

近期,中国石油西南油气田公司在四川盆地中部(以下简称川中)公山庙西地区部署实施的侏罗系凉高山组夹层型页岩油重点评价井——G119H井,测试获产油20 t/d、产气0.6×10^(4) m^(3)/d,取得了该盆地湖相夹层型页岩油的新突破。为了进一步明确四川盆地凉高山组湖相页岩油的资源潜力及勘探前景,基于G119H井所在区域的地质、地震资料,开展了凉高山组沉积地质背景、河道刻画、优质储层特征、富集模式等研究。研究结果表明:(1)凉高山组在多期湖盆迁移背景下,纵向发育多期叠置湖相页岩、三角洲前缘砂体;(2)公山庙西地区凉二段底部发育浅水三角洲前缘砂体,砂体由西南向北东推进入湖;(3)凉二段分流河道为最有利微相,岩性主要为细—中粒岩屑砂岩,平均孔隙度达6.3%,孔喉结构为小孔—微喉连通模式,可动油占比较高;(4)凉高山组夹层型页岩油分布广,具备烃源岩厚度大(超过10 m)、储层物性好、源储组合相邻匹配等有利条件;(5)该盆地内凉高山组夹层型页岩油有利地区面积约1.38×10^(4) km^(2),利用四川盆地现有三维地震资料刻画凉二段分流河道分布面积为2 336 km^(2),估算石油资源量约15×10^(8) t。结论认为,G119H井的突破揭示了川中地区凉二段夹层型页岩油具有规模开发潜力,进一步展现了盆地侏罗系页岩油良好的资源基础,明确了川中地区凉二段夹层型页岩油是“十四五”及中长期增储上产重点层段。

关键词：四川盆地夹层型页岩油侏罗系凉高山组公山庙勘探突破

An Edge-rotating Theorem on the Least Eigenvalue of Graphs

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Acta Mathematicae Applicatae Sinica 2015年第4期31卷 945-952页

作者： rui-fang LIU Hui-cai JIA Jin-long SHU School of Mathematics and Statistics Zhengzhou University College of Science Henan Institute of Engineering Department of Mathematics East China Normal University

Let G = （V（G）, E（G）） be a simple connected graph of order n. For any vertices u, v, w ￠V（G） with uv ∈ E（G） and uw ￠ E（G）, an edge-rotating of G means rotating the edge uv （around u） to the non-edge position uw. In this work, we consider how the least eigenvalue of a graph perturbs when the graph is performed by rotating an edge from the shorter hanging path to the longer one.

关键词： adjacency matrix least eigenvalue rotating an edge

Pathogenesis and Individualized Treatment for Postural Tachycardia Syndrome in Children

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Chinese Medical Journal 2016年第18期129卷 2241-2245页

作者： Wen-rui Xu Hong-fang Jin Jun-Bao Du Department of Pediatrics Peking University First Hospital Beijing 100034 China

Objective： Postural tachycardia syndrome （POTS） is one of the major causes of orthostatic intolerance in children. We systematically reviewed the pathogenesis and the progress of individualized treatment for POTS in children. Data Sources： The data analyzed in this review are mainly from articles included in PubMed and EMBASE. Study Selection： The original articles and critical reviews about POTS were selected for this review. Results： Studies have shown that POTS might be related to several factors including hypovolemia, high catecholamine status, abnormal local vascular tension, and decreased skeletal muscle pump activity. In addition to exercise training, the first-line treatments mainly include oral rehydration salts, beta-adrenoreceptor blockers, and alpha-adrenoreceptor agonists. However, reports about the effectiveness of various treatments are diverse. By analyzing the patient＇s physiological indexes and biomarkers before the treatment, the efficacy of medication could be well predicted. Conclusions： The pathogenesis of POTS is multifactorial, including hypovolemia, abnormal catecholamine state, and vascular dysfunction. Biomarker-directed individualized treatment is an important strategy for the management of POTS children.

关键词： Children Individualized Treatment Pathogenesis Postural Tachycardia Syndrome

基于ANSYS的模切机曲轴静力学与模态分析

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绿色包装 2024年第7期 15-18,23页

作者：宋鑫沈韶华房瑞明北京印刷学院北京102600

模切机曲轴的性能影响模切的速度和精度。本文分析现有模切机曲轴特性,对曲轴进行有限元分析,运用Solidworks软件建立曲轴三维模型,导入ANSYS Workbench软件模拟分析曲轴在模切机工作时的静态力学特性以及曲轴的振动特性,得到了应力、... 详细信息

模切机曲轴的性能影响模切的速度和精度。本文分析现有模切机曲轴特性,对曲轴进行有限元分析,运用Solidworks软件建立曲轴三维模型,导入ANSYS Workbench软件模拟分析曲轴在模切机工作时的静态力学特性以及曲轴的振动特性,得到了应力、应变云图和模态振型图。静力分析结果表明,最大应力为242.54MPa,小于轴的屈服极限强度,符合实际要求。模态分析结果表明,曲轴在低阶频率下以弯曲变形为主,最大振型位移出现在曲轴的两端;在高阶频率下以弯曲和扭转变形为主,主要发生在曲轴的两端连接肘杆的轴端。得到该曲轴的最小固有频率,为该曲轴的可靠性分析、疲劳强度校核提供计算依据。

关键词：模切机曲轴静力分析模态分析

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The Preparation of the Carbosilane Dendrimers with Pentafluorophenyl Groups

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Chinese Chemical Letters 2006年第9期17卷 1159-1161页

作者： rui fang GUAN Chuan Jian ZHOU Sheng Yu FENG School of Materials Science and Engineering Ji＇nan University Ji＇nan 250022 School of Materials Science and Engineering Shandong University Ji＇nan 250061 School of Chemistry and Chemical Engineering Shandong University Ji＇nan 250100

Polysiloxane was a good solvent for hydrosilation reaction of carbosilane dendrimers with pentafluorophenyl core and HSiMeE（CH2）3C6F5. A new kind of dendrimer with both pentafluorophenyl core and terminal groups was synthesized. The studies showed that with the increase of fluorination, the viscosity values of carbosilane dendrimers decreased.

关键词： Polysiloxane hydrosilation carbosilane dendrimer pentafluorobenzene low viscosity.

Rapid synthesis and properties of color-tunable phosphors SrMoO4：Eu^3＋,Tb^3＋

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Rare Metals 2017年第10期36卷 828-832页

作者： Yong-Qing Zhai rui-fang Li Xuan Li Jin-Hang Li College of Chemistry and Environmental Science Hebei University Baoding 071002 China

Color-tunable phosphors Sr0.94MoO4：xEu^3＋, （0.06 - x）Tb^3＋ were synthesized rapidly by microwave ra- diation method with active carbon particle as microwave absorbent. The synthesized phosphors were investigated by X-ray powder diffraction （XRD） and fluorescence spec- trophotometer. The effects of the ratio of Eu^3＋ and Tb^3＋ on the phase structure and luminescent properties of the phos- phors were discussed. The results show that Eu^3＋,Tb^3＋-doped samples can be well indexed to the pure tetragonal scheelite- type SrMoO4, indicating that Eu^3＋ and Tb^3＋ are effectively doped into the SrMoO4 host lattices. The as-synthesized Sro.94MoO4：xEu^3＋,（0.06 - x）Tb^3＋ phosphors have two luminescent centers （Eu^3＋ and Tb^3＋）, which can show red and green emissions under ultraviolet light excitation, respec- tively. Doping concentration of Eu^3＋ and Tb^3＋ has great effect on the intensity of emission peaks and the chromaticity of the samples, and the full color between green and red light can be achieved by adjusting the relative concentration of Eu^3＋ and Tb^3＋.

关键词： Microwave radiation method Color-tunable SrMoO4 Eu^3+,Tb^3+ Phosphors