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Study on Load Bearing Characteristics of Novel Expandable Deepwater Drilling Conductor Based on Laboratory Experiment and Field Test

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China Ocean Engineering 2023年第1期37卷 16-28页

作者： ZHANG Ming-he yang Jin yang yu-xiang XU Dong-sheng ZHOU Yi-su College of Safety and Ocean Engineering China University of Petroleum-BeijingBeijing 102249China

A novel expandable conductor was designed and applied in deep-water drilling to improve the vertical and lateral bearing capacity with a significant reduction of conductor jetting depth and soaking time. The vertical and lateral bearing capability of expandable conductors was depicted based on the ultimate subgrade reaction method and pile foundation bearing theory. The load-bearing characteristics of a laboratory-scale expandable conductor were analyzed through laboratory experiments. The serial simulation experiments are accomplished to study the bearing characteristics(vertical ultimate bearing capacity, lateral soil pressure, and lateral displacement) during the conductor soaking process. The laboratory experimental results show that the larger the length and thickness of expandable materials are,the higher the bearing capacity of the wellhead will be. During the conductor soaking process, the soil pressure around the three expandable conductors increases faster, strings representing a stronger squeezing effect and resulting in higher vertical bearing capacity. Furthermore, the lateral displacement of novel expandable conductor is smaller than that of the conventional conductor. All the advantages mentioned above contributed to the reduction of conductor’s jetting depth and soaking time. Lastly, the application workflow of a novel expandable deep-water drilling conductor was established and the autonomous expandable conductor was successfully applied in the South China Sea with a significant reduction of conductor’s jetting depth and soaking time. According to the soil properties and designed installation depth of the surface conductor, the arrangement of expandable materials should be designed reasonably to meet the safety condition and reduce the construction cost of the subsea wellhead.

关键词： novel expandable surface conductor deep water subsea wellhead laboratory experiment field test

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Uptake and accumulation of di-n-butyl phthalate in six leafy vegetables under hydroponic conditions

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Food Production, Processing and Nutrition 2019年第1期1卷 44-50页

作者： Yong Li Huang-qian Yan xiang-yang yu Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base Ministry of Science and Technology50 Zhongling StreetNanjing 210014China Institute of Food Safety and Nutrition Jiangsu Academy of Agricultural Sciences50 Zhongling StreetNanjing 210014China

The uptake and accumulation of di-n-butyl phthalate(DBP)in six leafy vegetables was investigated under hydroponic *** test vegetables were six varieties of Brassica campestris ssp.,including Kangresijiqing(KRSJQ),Xiadiqing(XDQ),Ziyoucai(ZYC),Aijiaohuang(AJH),Shanghaiqing(SHQ)and Gaogengbai(GGB).The root concentration factor(RCF),translocation factor(TF)and transpiration stream concentration factor(TSCF)were calculated in order to compare the difference of uptake and accumulation behaviours of DBP in vegetable *** results showed that DBP was easily concentrated in vegetable roots,but was poorly translocated from the roots to the *** the six vegetables,the ability of concentrating DBP from the solution to shoots was the highest in GGB,followed by ZYC,KRSJQ,AJH,SHQ and *** concentrations of DBP(5.0 mg/L)seem to inhibit normal physiological activity in the vegetables,which resulted in a higher RCF and a lower TF and TSCF than in low-concentration *** results will help to evaluate the safety of agricultural products and to provide evidence for screening DBP pollution-safe vegetable cultivars.

关键词： Di-n-butyl phthalate Root uptake Root concentration factor Translocation factor Transpiration stream concentration factor

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Numerical Simulation of Icing on Nrel 5-MW Reference Offshore Wind Turbine Blades Under Different Icing Conditions

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China Ocean Engineering 2022年第5期36卷 767-780页

作者： CAO Hui-qing BAI Xu MA Xian-dong YIN Qun yang xiang-yu School of Naval Architecture&Ocean Engineering Jiangsu University of Science and TechnologyZhenjiang 212003China The Department of Engineering Lancaster UniversityLancaster LA14YWUK

Offshore wind energy resources are operational in cold regions,while offshore wind turbines will face the threat of ***,it is necessary to study icing of offshore wind turbines under different icing *** this study,icing sensitivity of offshore wind turbine blades are performed using a combination of FLUENT and FENSAP-ICE software,and the effects of liquid water content(LWC),medium volume diameter(MVD),wind speed and air temperature on blade icing shape are analyzed by two types of ice,namely rime ice and glaze *** results show that the increase of LWC and MVD will increase the amount of ice that forms on the blade surface for either glaze ice or rime ice,and an increase of MVD will expand the adhesion surface between ice and *** reaching the rated wind speed of 11.4 m/s,it does not directly affect the icing ***,after reaching the rated wind speed,the attack angle of the incoming flow decreases obviously,and the amount of ice increases *** the ambient air temperature meets the icing conditions of glaze ice(i.e.,−5℃ to 0℃),the lower the temperature,the more glaze ice freezes,whereas air temperature has no impact on the icing of rime *** with onshore wind turbines,offshore wind turbines might face extreme meteorological conditions,and the wind speed has no impact on the amount of ice that forms on the blade surface for most wind speeds.

关键词： environmental parameters cold regions offshore wind turbine rime glaze numerical simulation

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Pyrolysis of Glucose over Two Amphoteric Metal Oxides

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Chemical Research in Chinese Universities 2009年第2期25卷 234-238页

作者： yang yu xiang Xi LUO Jia QI Wei-Yan YAN Hong-Peng LI Gui-Ying HU Chang-Wei Key Laboratory of Green Chemistry and Technology Ministry of Education College of Chemistry Sichuan University Chengdu 610064 P. R. China

The catalytic pyrolysis of glucose over amphoteric metal oxide, ZnO or γ-l2O3, was studied comparatively with direct pyrolysis. The effects of catalyst to glucose ratio on the yields of pyrolytic products and on the chemical composition of the liquid products were discussed. Compared with the pyrolytic products of direct pyrolysis, the amount of residual char decreased, whereas the gas yield increased in the presence of the catalysts. The highest liquid yield over ZNO（49.5%） was obtained when the ratio of ZnO to glucose was 5%, whereas over γ-Al2O3 the liquid yield increased with increasing the amount of γ-Al2O3 added. The presence of both the catalysts enhanced the selectivity to furans in liquid and reduced that of anhydro sugars. A selectivity of 69.7% to furans was obtained over 1% ZnO with a selectivity of 14.6% to 5-hydroxymethylfurfural（HMF）. The maximum selectivity to furans（74.9%） and that to HMF（25.6%） were obtained in the presence of 10% γ-Al2O3.

关键词： Glucose ZnO γ-Al2O3 Furans 5-Hydroxymethylfurfural

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Phasic study of intestinal homeostasis disruption in experimental intestinal obstruction

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World Journal of Gastroenterology 2014年第25期20卷 8130-8138页

作者： xiang-yang yu Chang-Lin Zou Zhen-Li Zhou Tao Shan Dong-Hua Li Nai-Qiang Cui Department of Gastrointestinal Surgery Nankai Hospital Graduate School of Tianjin Medical University Tianjin Institute of Acute Abdominal Diseases of Integrated Traditional Chinese and Western Medicine Department of Hepatopancreatobiliary Surgery Nankai Hospital

AIM: To investigate the phasic alteration of intestinal homeostasis in an experimental model of intestinal obstruction.

关键词： Intestinal obstruction Rabbit model Homeostasis disruption Intestinal epithelial cells Intestinal microorganisms Intestinal immune system

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The Design of High Speed Soft Handoff on the CDMA Mobile Communication System

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微计算机信息 2008年第15期24卷 146-147页

作者： yang yu-xiang HE Hui CHENG Nan FANG Jian-chao PLA Information Engineering University of Zhengzhou Hainan China450000 不详 National Digital Switch System R＆D Center ZhengZhou450002

In this paper,a brief introduction to SCH of CDMA system is *** the paper account for Soft Handoff of High Speed Packet Data and the *** the base of above account,this paper give the flow of High Speed Packet Data's S... 详细信息

关键词： CDMA 通信系统通信网络手机

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Association of the ADIPOQ Rs2241766 and Rs266729 Polymorphisms with Metabolic Syndrome in the Chinese Population:A Meta-analysis

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Biomedical and Environmental Sciences 2016年第7期29卷 505-515页

作者： ZHOU Jun Mei ZHANG Ming WANG Shu WANG Bing yuan HAN Cheng Yi REN Yong Cheng ZHANG Lu ZHANG Hong Yan yang xiang yu ZHAO yang HU Dong Sheng Department of Preventive Medicine Shenzhen University Health Sciences Center School of Basic Medicine Shenzhen University Health Sciences Center Department of Epidemiology and Health Statistics College of Public HealthZhengzhou University

Objective This meta-analysis was performed to summarize the association of the ADIPOQ rs2241766 and rs266729 polymorphisms with metabolic syndrome（MS） in the Chinese *** We searched for articles in MEDLINE via PubM ed,EMBASE,HuG E Navigator,CNKI,and Wanfang databases and calculated odds ratios（ORs） with 95% confidence intervals（CIs） to determine the strength of associations in fixed-or random-effects *** We included 21 articles in the meta-analysis：17 reports of ADIPOQ rs2241766 with 3628 cases and 3000 controls and 8 of rs266729 with 2021 cases and 2226 *** found an increased risk of MS with the ADIPOQ rs2241766 polymorphism in some genetic models（allele model：OR=1.12,95% CI：1.03-1.21;dominant model：OR=1.15,95% CI：1.04-1.28;homozygote model：OR=1.22,95% CI：1.00-1.49） but no association with the ADIPOQ rs266729 polymorphism（allele model：OR=0.98,95% CI：0.82-1.17;dominant model：OR=0.90,95% CI：0.79-1.02;recessive model：OR=1.09,95% CI：0.85-1.39;homozygote model：OR=1.03,95% CI：0.80-1.33）.Conclusion The results of this meta-analysis suggest an association between the ADIPOQ rs2241766 polymorphism and MS in the Chinese population.G allele of ADIPOQ rs2241766 increases the risk of *** designed studies with different ethnic populations and larger sample sizes are needed for assessing the relationship between ADIPOQ rs2241766 and rs266729 polymorphisms and MS in the future.

关键词： ADIPOQ Polymorphisms Metabolic syndrome Meta-analysis

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无刷双馈电机谐波转矩及定子绕组环流的分析

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华南理工大学学报（自然科学版） 2005年第5期33卷 38-42页

作者：杨向宇杨进华南理工大学电力学院广东广州510640

在分析无刷双馈电机的磁场分布及定子功率绕组、定子控制绕组和转子绕组所产生的各次谐波及其相互作用的基础上,提出了谐波等效电路.分析了谐波转矩的产生及其对无刷双馈电机运行性能的影响,并分析了无刷双馈电机转子绕组感应电流产生... 详细信息

在分析无刷双馈电机的磁场分布及定子功率绕组、定子控制绕组和转子绕组所产生的各次谐波及其相互作用的基础上,提出了谐波等效电路.分析了谐波转矩的产生及其对无刷双馈电机运行性能的影响,并分析了无刷双馈电机转子绕组感应电流产生的谐波磁场在定子绕组中的感应电压,以及定子绕组并联支路中环流的产生原因.为无刷双馈电机的分析设计及其谐波分析提供了理论工具.

关键词：谐波磁场无刷双馈电机运行性能谐波转矩环流

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Association and prognostic significance of alpha-L-fucosidase-1 and matrix metalloproteinase 9 expression in esophageal squamous cell carcinoma

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World Journal of Gastrointestinal Oncology 2022年第2期14卷 498-510页

作者： xiang-yang yu Sheng-Cheng Lin Meng-Qi Zhang Xiao-Tong Guo Kai Ma Li-Xu Wang Wen-Ting Huang Zhe Wang Xin yu Chun-Guang Wang Lan-Jun Zhang Zhen-Tao yu Department of Thoracic Surgery National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital&Shenzhen HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeShenzhen 518116Guangdong ProvinceChina Department of Pathology Shenzhen Maternity and Child Healthcare HospitalShenzhen 518038Guangdong ProvinceChina Department of Pathology National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital&Shenzhen HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeShenzhen 518116Guangdong ProvinceChina Department of Thoracic Surgery Sun Yat-Sen University Cancer CenterGuangzhou 510060Guangdong ProvinceChina

BACKGROUND Alpha-L-fucosidase-1(FUCA1)has been demonstrated to play opposing regulatory roles in adenocarcinoma and ***,recent studies reported that FUCA1 could decrease the invasion capability by downregulating matrix metalloproteinase 9(MMP-9)***,the potential role and prognostic significance of FUCA1 in esophageal squamous cell carcinoma(ESCC)have not yet been *** To evaluate the status,association,and prognostic value of FUCA1 and MMP-9 expression in *** Patients who underwent esophagectomy for ESCC between January 1,2014,and December 31,2014 at Sun Yat-Sen University Cancer Center were *** expression status of FUCA1 and MMP-9 in cancerous tissues was detected using *** addition,the expression profiles of the FUCA1 and MMP-9 genes in non-metastatic ESCC were extracted from The Cancer Genome Atlas(TCGA)*** High expression of FUCA1 and MMP-9 was found in 90 patients(75.6%)and 62 patients(52.1%),*** the high FUCA1 expression group,the constituent ratios of patients with stage III disease(61.1%vs 37.9%,P=0.029),lymphatic invasion(62.2%vs 31.0%,P=0.003),and high MMP-9 expression(60.0%vs 27.6%,P=0.002)were significantly higher than those in the low FUCA1 expression *** Kaplan-Meier univariate analysis,advanced tumor-nodemetastasis stage(III,P=0.001),positive regional lymph node metastasis(N+,P=0.002),high FUCA1 expression(P=0.001),and high MMP-9 expression(P=0.002)were potential predictors of shorter overall survival(OS),which was similar to the results analyzed based on the TCGA *** Cox multivariate regression analyses still demonstrated that FUCA1 and MMP-9 expression levels were independent prognostic factors of OS[hazard ratio(HR):0.484,95%confidence interval(CI):0.239-0.979;P=0.044;and HR:0.591,95%CI:0.359-0.973,P=0.039,respectively].CONCLUSION FUCA1 cooperation with MMP-9 may have a major role in affecting the ESCC invasion and metasta

关键词： Esophageal squamous cell carcinoma Alpha-L-fucosidase-1 Matrix metalloproteinase-9 Immunohistochemistry

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带位置误差校正的开关磁阻电机电流梯度法

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电机与控制学报 2019年第4期23卷 83-89页

作者：曾辉杨向宇华南理工大学电力学院广州510000

电流梯度法是一种通用性强,操作简单的无位置传感器技术。该方法对相电流进行低通滤波时导致相位后移,且转速越大,位置检测偏差越大,限制了适用的转速范围。对此采用零相移滤波方法,计算上一周波相电流因滤波产生的相移角,并对当前时刻... 详细信息

电流梯度法是一种通用性强,操作简单的无位置传感器技术。该方法对相电流进行低通滤波时导致相位后移,且转速越大,位置检测偏差越大,限制了适用的转速范围。对此采用零相移滤波方法,计算上一周波相电流因滤波产生的相移角,并对当前时刻输出的位置角进行补偿,提高位置检测精确度。分析了PWM控制方式下的相电流波形频谱,以确定合适的滤波截止频率。实验结果表明所提方法将转速对位置检测精确度的影响降低了86%,扩大了电流梯度法适用的转速范围。

关键词：无位置传感器控制零相移滤波器电流梯度法开关磁阻电机位置检测

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