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酸气回注技术发展现状及其在中国的应用前景

天然气工业 2013年第1期33卷 105-111页

作者：王寿喜汤林 john Carroll 西安石油大学中国石油勘探与生产分公司 Gas Liquids Engineering Ltd.

零排放的酸气回注技术是一种替代硫磺回收工艺的经济可行的酸气处理方法,同时也是一个减少温室气体排放的环保方法。为此,总结了酸气回注技术的发展和应用现状,结合实例对酸气回注和硫磺回收进行了经济技术和环保对比分析,结果表明:酸... 详细信息

零排放的酸气回注技术是一种替代硫磺回收工艺的经济可行的酸气处理方法,同时也是一个减少温室气体排放的环保方法。为此,总结了酸气回注技术的发展和应用现状,结合实例对酸气回注和硫磺回收进行了经济技术和环保对比分析,结果表明:酸气回注方案的硫处理费用为1 270美元/t;而硫磺回收的硫处理费用为1 400美元/t,若进一步考虑CO2排放、硫磺销售等因素,其综合处理费用将超过1 779美元/t。同时,分析了酸气回注在中国的应用需求及条件,展望了该技术在中国的应用前景,指出在下述几种情况下,为了取得最好的经济和环保效益,酸气回注会是一个不错的选择:①老气田气质变化后,硫磺回收装置已不适应生产需要而需改造;②新开发气田太偏远或h2S含量太低,硫磺回收不经济或工艺技术不好解决;③部分新开发气田的天然气组成不稳定,进行硫磺回收投资大、风险高;④部分碳酸盐岩开发油田伴生气含h2S,但含量变化大,进行硫磺回收工艺选择难度大;⑤火驱开发油田和采用蒸汽辅助重力泄油开发的稠油油田,其伴生气中h2S含量大,但气量小,回收不经济;⑥低渗透油田用CO2提高采收率等。

关键词：酸气回注硫磺回收碳排放温室气体中国经济和环保效益

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夹层电缆引发火灾的实验研究

安全与环境学报 2002年第6期2卷 29-33页

作者：尤飞 Lin john Z 周建军 Chow t t 邹样辉厉培德中国科学技术大学火灾科学国家重点实验室合肥230026 香港城市大学建筑科技学部

模拟现代建筑夹层中贮藏大量未加金属导管防护的电线电缆所引发的火灾效应。在一个全尺寸燃烧套房模型中进行了起火室和顶棚夹层空间电缆火灾的实验研究 ,并采用大涡模拟的方法对实验中烟气速度场进行了数值模拟。结果表明 ,加明火源可... 详细信息

模拟现代建筑夹层中贮藏大量未加金属导管防护的电线电缆所引发的火灾效应。在一个全尺寸燃烧套房模型中进行了起火室和顶棚夹层空间电缆火灾的实验研究 ,并采用大涡模拟的方法对实验中烟气速度场进行了数值模拟。结果表明 ,加明火源可以加强电缆的火灾功率 ;通风状况对夹层电缆火灾的温度场、烟气遮光度和火灾功率有明显影响。电缆燃烧产物中主要毒性气体为 CO。电缆在夹层燃烧时 ,CO和 CO2 浓度均高于目标室和起火室中的浓度。而夹层毒气最为集中 ,其 CO浓度远远超出 OShA和 IDL h标准。

关键词：夹层电缆火灾实验研究安全工程全尺寸燃烧套房大涡模拟建筑物防火

Near-infrared fluorescence sentinel lymph node detection in gastric cancer: A pilot study

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World Journal of Gastroenterology 2016年第13期22卷 3644-3651页

作者： Quirijn RJG tummers Leonora SF Boogerd Wobbe O de Steur Floris PR Verbeek Martin C Boonstra henricus JM handgraaf john V Frangioni Cornelis Jh van de Velde henk h hartgrink Alexander L Vahrmeijer Department of Surgery Leiden University Medical Center 2333 ZA Leiden The Netherlands Division of hematology/Oncology Department of Medicine and Department of Radiology Beth Israel Deaconess Medical Center Boston MA 02215 United States Curadel LLC 377 Plantation Street Worcester MA 01605 United States

AIM: to investigate feasibility and accuracy of near-infrared fluorescence imaging using indocyanine green: nanocolloid for sentinel lymph node (SLN) detection in gastric ***: A prospective, single-institution, phase I feasibility trial was conducted. Patients suffering from gastric cancer and planned for gastrectomy were included. During surgery, a subserosal injection of 1.6 mL ICG:Nanocoll was administered around the tumor. NIR fluorescence imaging of the abdominal cavity was performed using the Mini-FLARE™ NIR fluorescence imaging system. Lymph.t.c pathways and SLNs were visualized. Of every detected SLN, the corresponding lymph node station, signal-to-background ratio and histopathological diagnosis was determined. Patients underwent standard-of-care gastrectomy. Detected SLNs outside the standard dissection planes were also resected and ***: twenty-six patients were enrolled. Four patients were excluded because distant metastases were found during surgery or due to technical failure of the injection. In 21 of the remaining 22 patients, at least 1 SLN was detected by NIR Fluorescence imaging (mean 3.1 SLNs; range 1-6). In 8 of the 21 patients, tumor-positive LNs were found. Overall accuracy of the technique was 90% (70%-99%; 95%CI), which decreased by higher pt-stage (100%, 100%, 100%, 90%, 0% for respectively tx, t1, t2, t3, t4 tumors). All NIR-negative SLNs were completely effaced by tumor. Mean fluorescence signal-to-background ratio of SLNs was 4.4 (range 1.4-19.8). In 8 of the 21 patients, SLNs outside the standard resection plane were identified, th.t.contained malignant cells in 2 ***: this study shows successful use of ICG:Nanocoll as lymph.t.c tracer for SLN detection in gastric cancer. Moreover, tumor-containing LNs outside the standard dissection planes were identified.

关键词： Gastric cancer Sentinel lymph node Near-infrared fluorescence imaging Image-guided surgery Indocyanine green

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电力系统经济调度中遗传算法的比较研究

电网技术 1995年第3期19卷 28-33,38页

作者： Y.h. Song, University of Bath, UKF. li . R. Morgan , john Moores University, Liverpool, UKD. t. Y Cheng, National Grid Cornpany , UK

本文介绍了在电力经济调度中用于改善系统运行性能的遗传算法的某些修改。目的是试图找出供遗传算法使用的最佳运行点。为了改善运行性能，涉及到问题的两个阶段：即首先是选择一种适当的遗传策略，其次是为所选定的遗传策略对各种参数... 详细信息

本文介绍了在电力经济调度中用于改善系统运行性能的遗传算法的某些修改。目的是试图找出供遗传算法使用的最佳运行点。为了改善运行性能，涉及到问题的两个阶段：即首先是选择一种适当的遗传策略，其次是为所选定的遗传策略对各种参数的值进行协调。这两个阶段均已在六机系统中经过试验，并按照在线及离线两种情况对试验结果进行了比较。全部研究工作清楚地表明，采用先进的遗传算子及优化选择参数值能使系统性能显著增强。

关键词：遗传算法经济调度电力系统

Pre-operative stereotactic radiosurgery treatment is preferred to post-operative treatment for smaller solitary brain metastases

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Chinese Neurosurgical Journal 2017年第4期3卷 205-212页

作者： hamidreza Aliabadi Arian M. Nikpour David S. Yoo James E. herndon II john h. Sampson john P. Kirkpatrick Spine and Neurosurgery Associates 1301 Secret Ravine Parkway Suite 200Roseville CA 95661 USA Department of Radiology UC Davis MedicalCenter UC Davis School of Medicine Sacramento CA USA Department ofRadiation Oncology Duke University Medical Center Durham NC USA Department of Biostatistics and Bioinformatics Duke University MedicalCenter Durham NC USA Department of Surgery Division of NeurosurgeryDuke University Medical Center Durham NC USA

Background:While the optimal combination of whole-brain radiotherapy (WBRt), stereotactic radiosurgery (SRS) and surgical resection in the treatment of brain metastases, is controversial, the addition of SRS to surgical resction of solitary metastasis may enhance local control while potentially minimizing toxicity associated with adjuvant WBRt. this study seeks to determine wh.t.er pre-operative SRS to the lesion versus post-operative SRS to the resection bed may reduce irradiation of adjacent normal brain tissue. Methods:A retrospective study of 12 patients with 13 surgically resected cerebral metastases was performed. the pre-operative contrast-enhancing tumors and post-operative resection cavities plus any enhancing residual disease were contoured to yield the gross target volume (GtV). In turn these GtV''''s were uniformly expanded by 3-mm to generate the pre-operative, as well as post-operative planning target volume (PtV.) For each lesion, a 7-static-conformal-beam, non-coplanar plan utilizing 6 MV ph.t.ns was generated to encompass the PtV within the 85％isodose line. Excess normal brain volume irradiated was defined as the volume outside the GtV receiving the prescribed dose. Results:When lesions were divided into two groups-Group A (pre-operative GtV''''stive GtV''''s>15 cc, n=4)-the average volume of normal brain irradiated was significantly smaller if pre-operative SRS was used for treatment of lesions in Group A (9.5 vs. 16.8 cc, paired t-test, p=0.0045). In contrast, this volume was smaller for Group B lesions if post-operative SRS was used for treatment of these lesions (27.6 vs. 51.2 cc, p=0.252). A comparison of groups with respect to mean volume differences between pre-and post-operative SRS was significantly different (two-sample t-test p=0.016). GtV and the difference between pre-and post-operative volume were highly correlated (Pearson correlation=?0.875, ptive treatment of smaller

关键词： Stereotactic radiosurgery Brain metastases Pre-operative Solitary brain metastases

Dietary analysis of homonota darwini (Squamata:Gekkonidae) in Northern Patagonia

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Current Zoology 2010年第4期56卷 406-410页

作者： Marcelo E.KUN Carla PIANtONI john D.KRENZ Nora R.IBARGüENGOYtíA Departamento de Zoología Centro Regional Universitario Bariloche Universidad del Comahue Unidad Postal Universidad del Comahue Smithsonian Institution NHB MRC 163 Department of Biological Sciences Minnesota State University Departamento de Zoologia Centro Regional Universitario Bariloche Universidad del Comahue Unidad Postal Universidad del Comahue Instituto de Investigación en Diversidad y Medio Ambiente (INIBIOMA) Consejo Nacional de Investigaciones Científicas y técnicas (CONICEt)

Our study investigated the diet of the southernmost gecko in the world, homonota darwini. Fifty-three specimens were captured during spring and summer in four locations in Patagonia, Argentina. the stomach contents of the specimens were identified, and we tbund th.t.prey consisted of six main groups： Coleoptera, hymenoptera, homoptera and Araneae, and the adults and larvae of moth Lepidoptera. Lepidoptera was the major dietary component. the presence of ants and moths as common prey suggests an ambush feeding strategy. In spring, females consumed more ants than males although no other dietary differences between males and females were evident. We tbund nine geckos with empty stomachs and six parasitized by nematodes. Presence of empty stomachs corroborates previous observations of other nocturnal geckos and non-gecko lizards. Reduced foraging success of nocturnal lizards could be due to difficulty in prey detection due to dim light, reduced or erratic activity of insect prey at night, or shorter activity times of geckos relative to diurnal success. Sex and season were not associated with.t.e incidence of empty stomachs. Principal component analysis showed th.t.four food alternatives correlated with season. the constraint of nocturnality, coupled with low night-time temperatures restricting feeding to only a few hours after sunset, appear to have caused a generality of diet which may limit energy acquisition. We conclude th.t.h. darwini is an arthropod generalist and likely an ambush forager, as are many other nocturnal gekkonids

关键词： Nocturnal lizards Diet Gekkonidae Patagonia PCA

Electrocardiographic interference and conductance volume measurements

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Journal of Biomedical Science and Engineering 2009年第7期2卷 491-498页

作者： Simon P. McGuirk Dan Ewert David J. Barron john h. Coote 不详

the conductance cath.t.r technique enables continuous ventricular volume measurements based on the electrical conductance of blood within the ventricular cavity. however, ventricular excitation also produces a measurable electrical signal within the ventricular cavity. this study was undertaken to investigate the relationship between the ventricular electrogram and conductance volume measurements in a physical model of the left ventricle without parallel conductance. the ventricular electrogram was simulated with an ECG signal, ECGinput connected to two ring electrodes within the model ventricle. Conductance volume measurements were made with and without ECGinput. the difference between these measurements, GECG(t), represented the conductance volume due to ECGinput. GECG(t) varied as a function of the first-derivative of ECGinput with respect to time (r2=0.92, P<0.001). GECG(t), this primarily affected volume measurements during ventricular depolarisation;during this phase the volume measurement error varied widely between –12% and +9%. As a re-sult, end-diastole could not be reliably identified on the pressure-volume loop. the accuracy of conduc-tance volume measurements during late diastole and early isovolumic contraction are substantially affected by the ventricular electrogram. this may result in a significant error in end-diastolic volume estimates, which has important implications for the quantitative assessment of ventricular function including, in particular, the assessment of chamber compliance.

关键词： Volume Measurement Conductance Cath.t.r Electrocardiogram Ventricular Electrogram

the relationship between transport-to-school habits and physical activity in a sample of New Zealand adolescents

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Journal of Sport and health Science 2019年第5期8卷 463-470页

作者： Chiew Ching Kek Enrique García Bengoechea john C.Spence Sandra Mandic Active Living Laboratory School of Physical EducationSport and Exercise SciencesUniversity of OtagoDunedin 9054New Zealand Department of Physical Education and Sport Sciences Faculty of Education and Health SciencesUniversity of LimerickLimerickV94 T9PXIreland Institute for health and Sport(IhES) Victoria UniversityMelbourneVIC 8001Australia Faculty of Kinesiology Sportand RecreationUniversity of AlbertaEdmontonAlbertaT6G 2H9Canada Centre for Sustainability University of OtagoDunedin 9054New Zealand

Objectives:Adolescents using active transport(At)to school have higher levels of physical activity(PA)compared with motorized transport(Mt)*** study compared school day and weekend day PA in adolescents using At,Mt,or combined At and Mt(At + Mt)to travel to ***:Adolescents(n= 314;age:14.7±1.4 years;32.8% boys)from Dunedin(New Zealand)wore an accelerometer for 7 days and completed a self-reported survey regarding mode of transport to school(73 At,56 At + Mt,and 185 Mt).Data were analyzed using t tests,analysis of variance,and χ2 ***:Although.t.e proportion of adolescents meeting PA guidelines significantly differed among transport groups(At,47.9%;At + Mt,46.4%;Mt,33.5%;p=0.048;overall,39.2%),the observed differences were due mainly to *** with Mt,At and At+Mt engaged in more moderate-to-vigorous PA(MVPA)per day(At:61.2 ± 23.2 min;At+Mt:59.6 ± 21.7 min;Mt:52.5 ± 19.6 min;p = 0.004;pted for gender),per school day and before *** after school(15:00-16:00),At engaged in significantly more MVPA compared with At + Mt and *** differences in MVPA between the groups were observed in the late afternoon/early evening period during school days or on weekend ***:Compared with Mt users,adolescent girls using At or At + Mt accumulated more MVPA during school commute *** + Mt to school is also a plausible way to increase adolescent girls’ PA when At only is not feasible.

关键词： Accelerometer Adolescent Physical activity Schools transportation Walking