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作者： Gomado foster Dodzi 中国石油大学(华东)

学位级别：硕士

乳化广泛应用于油气开发的各个阶段。在页岩气的勘探过程中,页岩失稳是页岩钻井中遇到的主要问题之一。相较于油基钻井液对地层环境的极大破坏性,乳化钻井液的出现为页岩油气开发提供了一种更环保、高效的选项。因此,使用刺激响应型乳... 详细信息

乳化广泛应用于油气开发的各个阶段。在页岩气的勘探过程中,页岩失稳是页岩钻井中遇到的主要问题之一。相较于油基钻井液对地层环境的极大破坏性,乳化钻井液的出现为页岩油气开发提供了一种更环保、高效的选项。因此,使用刺激响应型乳化剂和纳米颗粒制备高稳定可逆乳状液的研究得到了广泛关注。可逆乳状液的形成机理、反相机理、稳定性、耐温性、耐盐性对其在严苛环境中应用有至关重要的影响。本论文采用光学显微镜,扫描电镜,乳剂耐压试验和紫外光谱等测试手段,系统地考察了纳米颗粒对可逆乳状液乳化性能的影响,深入探讨了影响机理,并对乳化剂与纳米颗粒之间的吸附作用机理进行了评价。研究结果表明,乳状液的乳化程度与纳米颗粒的表面活性存在显著关联模式。纳米颗粒的浓度对可逆乳状液的稳定性、耐温性、耐盐性等性能有一定影响。其中,纳米颗粒浓度对可逆乳状液耐盐性的影响与电解质的种类有关。研究进一步发现,随着纳米颗粒浓度的增加其对可逆乳状液的相变机理没有显著影响。

关键词：纳米颗粒可逆乳状液钻井液电势稳定性乳化剂

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加拿大减少香烟危害的措施

环境与职业医学 2002年第4期19卷 272-273页

作者： HaroldD.foster WeiminHu HaroldD.foster PhDProfessorDepartmentofGeographyUniversityofVictoriaVictoriaBCCanada PopulationHealthAnalyst VancouverIslandHealthAuthorityVictoriaBCCanada

最近,加拿大的电视台和各大新闻报纸正在播报由联邦政府卫生部制作的有关香烟危害的广告.其效果好似Ron English在其万维网的主页'Popaganda'展示的艺术宣传广告一样,引起了民众的广泛注意[1].这些联邦政府的广告的内容是三俱陈尸及在... 详细信息

最近,加拿大的电视台和各大新闻报纸正在播报由联邦政府卫生部制作的有关香烟危害的广告.其效果好似Ron English在其万维网的主页'Popaganda'展示的艺术宣传广告一样,引起了民众的广泛注意[1].这些联邦政府的广告的内容是三俱陈尸及在其下方的粗体字广告词'每年有45 000以上的加拿大人死于吸烟,从而应该有45 000以上条理由戒烟'.前任联邦政府卫生部长Allan Rock把吸烟称之为'国家性魔难',认为是加拿大最主要的公共卫生问题.与此舆论相应的行动是加拿大联邦政府一直开展着目前世界上最为严厉的戒烟运动[2].

关键词：加拿大香烟危害戒烟

Robotic pendant drop:containerless liquid for μs-resolved,AI-executable XPCS

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Light(Science & Applications) 2023年第9期12卷 1857-1866页

作者： Doga Yamac Ozgulbas Don Jensen Jr. Rory Butler Rafael Vescovi Ian T.foster Michael Irvin Yasukazu Nakaye Miaoqi Chu Eric M.Dufresne Soenke Seifert Gyorgy Babnigg Arvind Ramanathan Qingteng Zhang Data Science and Learning Division Argonne National LaboratoryLemontIL 60439USA X-ray Science Division Argonne National LaboratoryLemontIL 60439USA Departement of Computer Science University of Chicago5801 S Ellis AveChicagoIL 60637USA XRD Design and Engineering Department Rigaku Corporation 3-9-12 Matsubara-choAkishima-shiTokyo 196-8666Japan Bioscience Division Argonne National LaboratoryLemontIL 60439USA

The dynamics and structure of mixed phases in a complex fluid can significantly impact its material properties,such as ***-angle X-ray Photon Correlation Spectroscopy(SA-XPCS)can probe the spontaneous spatial fluctuations of the mixed phases under various in situ environments over wide spatiotemporal ranges(10−6–103 s/10−10–10−6 m).Tailored material design,however,requires searching through a massive number of sample compositions and experimental parameters,which is beyond the bandwidth of the current coherent X-ray *** 3.7-μs-resolved XPCS synchronized with the clock frequency at the Advanced Photon Source,we demonstrated the consistency between the Brownian dynamics of~100 nm diameter colloidal silica nanoparticles measured from an enclosed pendant drop and a sealed *** electronic pipette can also be mounted on a robotic arm to access different stock solutions and create complex fluids with highly-repeatable and precisely controlled composition *** closed-loop,AI-executable protocol is applicable to light scattering techniques regardless of the light wavelength and optical coherence,and is a first step towards high-throughput,autonomous material discovery.

关键词： resolved sealed mounted

“Streets of Fire”revisited:contact burns

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Burns & Trauma 2019年第1期7卷 295-308页

作者： Areta Kowal-Vern Marc R.Matthews Karen N.Richey Kathy Ruiz Michael Peck Arpana Jain Kevin N.foster Arizona Burn Center Maricopa Medical CenterDepartment of SurgeryMaricopa Integrated Health System2601 E.Roosevelt StreetPhoenixArizona 85008USA Research Department Maricopa Integrated Health SystemPhoenixArizona 85008USA

Background:Pavement-street contact burns are *** study compared recent contact burns to those published in“Pavement temperature and burns:Streets of Fire”in *** hypothesis was that there were a significantly increased number of pavement-street burns,as a result of increased ambient temperatures,and that motor vehicle crash(MVC)contact burns were less severe than pavements-street ***:This was a retrospective burn center registry study of naturally heated surface contact burns during May to September from 2016 to *** analyses were performed with one-way analysis of variance(ANOVA)and Maximum Likelihood chi-squared for age,percent of total burn surface area(%TBSA),treatment,hospitalization,comorbidities,hospital charges,mortality,ambient,and surface temperatures(pavement,asphalt,rocks).Results:In the 1995 study,median ambient temperatures were 106(range 100–113)°F compared to the 108(range 86–119)°F highest noon temperature in the current *** ambient temperature differences were recorded on days with pavement burn admissions compared to days without these *** were 225 pavement,27 MVC,15 road rash,and 103 other contact *** major injuries in the pavement group were due to being“down”(unknown reason),falls,and *** to the others,the pavement group was older,56+years,p<0.001,and had smaller burns but similar length of *** percent of the 225 pavement group patients with full-thickness burns required skin *** were 13(6%)fatalities in the pavement group vs 1(4%)in the MVC group,p=*** were secondary to sepsis,shock,cardiac,respiratory,or kidney *** to survivors,the non-survivors had a significantly higher%TBSA(10%vs 4%),p=0.01,and lower Glasgow Coma Scores(10 vs 15),p=***:There was a median 2°F increase in ambient temperature since *** increase in pavement burn admissions was multi-factorial:higher temperatures,population,and the number of old

关键词： Pavement Concrete Asphalt Contact burns Road rash Streets Highways Sand Rocks

GU-PCM2型控温式相变蓄冷冷藏车设计与空载性能试验

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农业工程学报 2019年第6期35卷 288-295页

作者：刘广海吴俊章 Alan foster 谢如鹤唐海洋邹毅峰屈睿瑰广州大学冷链物流与标准化研究所广州510006 伦敦南岸大学工程学院广州城市职业学院广州510405 中南大学交通运输工程学院长沙410075

现有蓄冷冷藏车蓄冷装置多位于车厢顶部,存在重心偏高、不可控温等问题,基于此,该文设计了一款集相变蓄冷单元、车载制冷系统、隔热车厢、送风系统等于一体的GU-PCM2型蓄冷冷藏车。该蓄冷车将蓄冷装置独立设置于车厢前端并保温,系统利... 详细信息

现有蓄冷冷藏车蓄冷装置多位于车厢顶部,存在重心偏高、不可控温等问题,基于此,该文设计了一款集相变蓄冷单元、车载制冷系统、隔热车厢、送风系统等于一体的GU-PCM2型蓄冷冷藏车。该蓄冷车将蓄冷装置独立设置于车厢前端并保温,系统利用夜间低谷电进行充冷,可在-25～10℃之间根据需要调控车厢温度。对蓄冷冷藏车厢设定温度为0和-18℃的2种工况进行空载温度场仿真与测试。结果表明,车厢内各测温点的模拟温度与实测温度均方根误差分别为0.7和0.8℃,最大绝对误差分别为1.1和1.2℃。冷藏车可有效控温10 h以上,车厢平均温度分别在1.1～2.9℃和-14.8～-16.9℃之间,波动范围为1.8和2.1℃,温度不均匀度系数在1.0以内。控温式蓄冷冷藏车与传统蓄冷车的对比试验结果表明,其平均温度波动值降低48.7%,温度绝对不均匀度系数降低50%以上,车厢质心较顶置式蓄冷车下降25.9%。研究结果可为蓄冷冷藏车的进一步优化设计与应用提供参考。

关键词：设计试验数值分析相变蓄冷温度分布冷藏车

The Downlink Adjacent Interference for Low Earth Orbiting (LEO) Search and Rescue Satellites

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International Journal of Communications, Network and System Sciences 2010年第2期3卷 107-115页

作者： Shkelzen CAKAJ Mickey FITZMAURICE Jesse REICH Eric foster 不详

NOAA (National Oceanic and Atmospheric Administration) - LEO environmental satellites provide continuous coverage of Earth, supplying high-resolution global meteorological, oceanic and space observation data. In addition, these satellites are part of the international COSPAS – SARSAT program, which aides search and rescue teams worldwide. The USA segment, referred to as SARSAT (Search and Rescue Satellite Aided Tracking) system, is designed to provide distress alert and location data to assist on search and rescue operations. SARSAT locates distress beacons (406MHz) activated at distress locations. The system calculates a location of the distress event using Doppler processing techniques. Processed data is continuously retransmitted through the SARSAT downlink to Local User Terminals (LUT) when satellites are in view. The downlink adjacent interference is expected when two satellites operate in close proximity and share the same frequency. The downlinks of all SARSAT LEO satellites use the same 1544.5 MHz frequency. In cases where the satellites are within the main lobe of the local user terminal antenna, transmissions from adjacent satellites act as interference to one-another, effectively decreasing the signal-to-noise ratio of the desired downlink. This can result in missed distress beacon bursts or no stored solutions received at the LUT, consequently no data is provided about a distress location. Analysis on interference prediction, impacts on system operation and recommendations for mitigating interference periods where the duration may be significant, are presented in this paper.

关键词： LEO LUT Beacon Doppler Satellite Adjacent Interference

Attitudes Towards Shoplifting： A Preliminary Cross-cultural Study of Consumers

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Management Studies 2014年第6期2卷 373-380页

作者： Amal Abdelhadi Carley foster Paul Whysall Mohammed Rawwas University of Benghazi Benghazi Libya Nottingham Trent University Nottingham UK University of Northern Iowa Iowa USA

The aim of this paper is to explore the consumers’ attitudes towards shoplifting from a cross-cultural perspective. The research questions are: 1. What may influence offenders to engage in shoplifting? 2. To which extent consumer attitudes towards shoplifting might reflect cultural issues? The study adopted a quantitative approach to data collection and was conducted in two stages including different retail contexts. Preliminary analysis of 529 questionnaire responses from UK, US, and Libyan consumers finds that attitudes towards shoplifting are broadly similar despite the different cultural and retail contexts therefore this study reinforces the view that ethical behaviour is culturally bound. However, on closer inspection these findings suggest interesting disparities among the countries in relation to specific attitudes towards the consequences of shoplifting, the impact it has on the social networks of the perpetrator and whether the demographics of the shoplifter play a role in the decision to punish the offender. It also suggests that attitudes towards shoplifting are complex and context specific making it particularly problematic for international retailers to implement universal shoplifting preventative measures.

关键词：管理学管理学理论管理方法管理技术

倾向得分法及其在科技工作者自我效能认知研究中的应用

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科学学与科学技术管理 2010年第10期31卷 186-191页

作者：肖雅楠张再生 foster E.Michael 天津大学管理学院天津300072 美国北卡罗来纳大学公共卫生学院美国北卡罗来纳州27519

因果推论背景下的倾向得分法是近年在国外发展起来的重要因果分析方法,是排除背景变量混杂干扰,通过模拟随机抽样,使用抽样调查数据计算干预效果的有效方法。采用天津市科技工作者实际工作状况调查的抽样数据,使用倾向得分法测算薪酬、... 详细信息

因果推论背景下的倾向得分法是近年在国外发展起来的重要因果分析方法,是排除背景变量混杂干扰,通过模拟随机抽样,使用抽样调查数据计算干预效果的有效方法。采用天津市科技工作者实际工作状况调查的抽样数据,使用倾向得分法测算薪酬、专业技术职级、行政职级对于自我成就感的影响,从而验证传统激励措施对于自我效能认知的提升作用,以及对于科技人才开发管理的促进作用。应用倾向得分法模拟随机抽样后,薪酬对于天津市科技工作者的自我效能认知具有显著影响,专业技术职级的作用不再显著,而行政职级的作用则显示出显著相关。

关键词：倾向得分因果推论自我效能

A WIDE BAND UP-CONVERSION MIXER FOR CABLE TELEVISION TUNER

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Journal of Electronics(China) 2006年第6期23卷 952-955页

作者： Mao Wei Shi Yin Dai Fa.foster Artificial Neural Network and High Speed Circuit Lab Institute of Semiconductors Chinese Academy of Sciences P. O. Box 912 Beoing 100083 China Electronic ＆ Computer Engineering Dept Auburn University Auburn Alabama 36849-5201 USA

An up-conversion mixer implemented in a 0.35μm SiGe BiCMOS technology for a double conversion cable TV tuner is described. The mixer converts the 100MHz to 1000MHz band to the Intermediate Frequency of 1GHz above. The mixer meets the linearity and noise figure requirements for a TV tuner. The noise figure (IF) of 19.2～17.5dB, 1dB compression of 12.1dBm, and gain of-1～0.7dB in the 900MHz band are achieved at a supply voltage of 5V. The power consumption is 47mW.

关键词：混合器上转换带宽高线性噪声特征