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Micro segment analysis of supercritical methane thermal-hydraulic performance and pseudo-boiling in a PCHE straight channel

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Petroleum Science 2024年第2期21卷 1275-1289页

作者： Qian Li Zi-Jie Lin Liu Yang Yue Wang Yue Li Wei-hua cai Laboratory of Thermo-Fluid Science and Nuclear Engineering Northeast Electric Power UniversityJilin132000JilinChina School of Energy and Power Engineering Northeast Electric Power UniversityJilin132000JilinChina

The printed circuit heat exchanger(PCHE) is receiving wide attention as a new kind of compact heat exchanger and is considered as a promising vaporizer in the LNG process. In this paper, a PCHE straight channel in the length of 500 mm is established, with a semicircular cross section in a diameter of 1.2 *** simulation is employed to investigate the flow and heat transfer performance of supercritical methane in the channel. The pseudo-boiling theory is adopted and the liquid-like, two-phase-like, and vapor-like regimes are divided for supercritical methane to analyze the heat transfer and flow *** results are presented in micro segment to show the local convective heat transfer coefficient and pressure drop. It shows that the convective heat transfer coefficient in segments along the channel has a significant peak feature near the pseudo-critical point and a heat transfer deterioration when the average fluid temperature in the segment is higher than the pseudo-critical point. The reason is explained with the generation of vapor-like film near the channel wall that the peak feature related to a nucleateboiling-like state and heat transfer deterioration related to a film-boiling-like state. The effects of parameters, including mass flow rate, pressure, and wall heat flux on flow and heat transfer were *** calculating of the averaged heat transfer coefficient of the whole channel, the traditional method shows significant deviation and the micro segment weighted average method is adopted. The pressure drop can mainly be affected by the mass flux and pressure and little affected by the wall heat flux. The peak of the convective heat transfer coefficient can only form at high mass flux, low wall heat flux, and near critical pressure, in which condition the nucleate-boiling-like state is easier to appear. Moreover,heat transfer deterioration will always appear, since the supercritical flow will finally develop into a filmboiling-like state. So hea

关键词： Printed circuit heat exchanger Vaporization Supercritical methane Pseudo-boiling Micro segment analysis

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Hepatic perivascular epithelioid cell tumors:The importance of preoperative diagnosis

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World Journal of Gastroenterology 2024年第13期30卷 1926-1933页

作者： Shuai Yan Jia-Jie Lu Lin Chen Wei-hua cai Jin-Zhu Wu Department of Medical School Nantong UniversityNantong 226300Jiangsu ProvinceChina Department of Hepatobiliary Surgery Affiliated Nantong Hospital 3 of Nantong UniversityNantong 226006Jiangsu ProvinceChina Nantong Institute of Liver Disease Affiliated Nantong Hospital 3 of Nantong UniversityNantong 226006Jiangsu ProvinceChina

Accurate preoperative diagnosis is highly important for the treatment of perivascular epithelioid cell tumors(PEComas)because PEComas are mainly benign tumors and may not require surgical *** analyzing the causes,properties and clinical manifestations of PEComas,we summarize the challenges and solutions in the diagnosis of PEComas.

关键词： Hepatic perivascular epithelioid cell tumors Liver Preoperative diagnosis Angiomyolipomas Mesenchymal tissue-derived tumors

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Comparison of prognosis and postoperative morbidities between standard pancreaticoduodenectomy and the TRIANGLE technique for resectable pancreatic ductal adenocarcinoma

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World Journal of Gastrointestinal Surgery 2024年第3期16卷 689-699页

作者： He-Xing Hang Zheng-hua cai Yi-Fei Yang Xu Fu Yu-Dong Qiu Hao Cheng Division of Pancreatic Surgery Department of General SurgeryNanjing Drum Tower HospitalThe Affiliated Hospital of Medical SchoolNanjing UniversityNanjing 210008Jiangsu ProvinceChina

BACKGROUND Radical surgery combined with systemic chemotherapy offers the possibility of long-term survival or even cure for patients with pancreatic ductal adenocar-cinoma(PDAC),although tumor recurrence,especially locally,still inhibits the treatment *** TRIANGLE technique was introduced as an extended dissection procedure to improve the R0 resection rate of borderline resectable or locally advanced ***,there was a lack of studies concerning postoperative complications and long-term outcomes of this procedure on patients with resectable *** Patients with resectable PDAC eligible for PD from our hospital between June 2018 and December 2021 were enrolled in this retrospective cohort *** the patients were divided into PDstandard and PDTRIANGLE groups according to the surgical *** characteristics,surgical data,and postoperative morbidities were *** of the patients were followed up,and the date and location of tumor recurrence,and death were *** Kaplan-Meier method and log-rank test were used for the survival *** There were 93 patients included in the study and 37 underwent the TRIANGLE *** of operation was longer in the PDTRIANGLE group compared with the PDstandard group[440(410-480)min vs 320(265-427)min](P=0.001).Intraoperative blood loss[700(500-1200)mL vs 500(300-800)mL](P=0.009)and blood transfusion[975(0-1250)mL vs 400(0-800)mL](P=0.009)were higher in the PDTRIANGLE *** was a higher incidence of surgical site infection(43.2%vs 12.5%)(P=0.001)and postoperative diarrhea(54.1%vs 12.5%)(P=0.001)in the PDTRIANGLE *** rates of R0 resection and local recurrence,overall survival,and disease-free survival did not differ significantly between the two *** The TRIANGLE technique is safe,with acceptable postoperative morbidities compared with standardized PD,but it does not improve prognosis for patients with resectable PDAC.

关键词： Pancreatic ductal adenocarcinoma TRIANGLE technique Pancreaticoduodenectomy Prognosis Postoperative morbidities

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Retrospective analysis of patients with hepatocellular carcinoma complicated with human immunodeficiency virus infection after hepatectomy

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World Journal of Gastrointestinal Oncology 2024年第9期16卷 3851-3864页

作者： Jia-Jie Lu Shuai Yan Lin Chen Lin-Ling Ju Wei-hua cai Jin-Zhu Wu Department of Hepatobiliary Surgery Nantong Third People's HospitalMedical School of Nantong UniversityNantong 226000Jiangsu ProvinceChina Department of Medical School Nantong UniversityNantong 226300Jiangsu ProvinceChina Institute of Liver Disease Nantong Third People’s HospitalAffiliated Nantong Hospital 3 of Nantong UniversityNantong 226000Jiangsu ProvinceChina Department of Hepatobiliary Surgery Affiliated Nantong Hospital 3 of Nantong UniversityNantong 226006Jiangsu ProvinceChina

BACKGROUND Hepatocellular carcinoma(HCC)is the third leading cause of cancer death worldwide,with a 5-year relative survival rate of approximately 18%.The similarity between incidence and mortality(830000 deaths per year)underscores the bleak prognosis associated with the *** is the fourth most common malignancy and the second leading cause of cancer death in *** patients with HCC have a history of chronic liver disease such as chronic hepatitis B virus(HBV)or hepatitis C virus(HCV)infection,alcoholism or alcoholic steatohepatitis,nonalcoholic fatty liver disease,or nonalcoholic *** diagnosis and effective treatment are the keys to improving the prognosis of patients with *** the total number of human immunodeficiency virus(HIV)-infected patients is declining globally the incidence of HCC is increasing in HIVinfected patients,especially those who are coinfected with HBV or *** a result,people infected with HIV still face unique challenges in terms of their risk of developing *** To investigate the survival prognosis and clinical efficacy of surgical resection in patients with HCC complicated with HIV *** The clinical data of 56 patients with HCC complicated with HIV admitted to the Third Affiliated Hospital of Nantong University from January 2013 to December 2023 were retrospectively *** these,27 patients underwent hepatectomy(operation group)and 29 patients received conservative treatment(nonoperation group).All patients signed informed consents in line with the provisions of medical *** general data,clinicopathological features and prognoses for the patients in the two groups were analyzed and the risk factors related to the prognoses of the patients in the operation group were *** The median disease-free survival(DFS)and overall survival(OS)of HIV-HCC patients in the surgical group were 13 months and 17 months,respectively,and the median OS of patients in the nonsurgic

关键词： Hepatocellular carcinoma Human Immunodeficiency virus Liver resection Retrospective analysis Prognosis

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Cost-effectiveness analysis of different anesthesia strategies for transperineal MRI/US fusion prostate biopsy

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Asian Journal of Andrology 2024年第4期26卷 409-414页

作者： Di Jin Xiao-Qi Kong Ya-Juan Zhu Zong-Xin Chen Xi-Ming Wang cai-hua Xu Jin-Xian Pu Jian-Quan Hou Yu-hua huang Fu-Hai Ji Chen huang Department of Anesthesiology The First Affiliated Hospital of Soochow UniversitySuzhou 215006China Department of Urology The First Affiliated Hospital of Soochow UniversitySuzhou 215006China Department of Radiology The First Affiliated Hospital of Soochow UniversitySuzhou 215006China Department of Oncology The First Affiliated Hospital of Soochow UniversitySuzhou 215006China Department of Urology Dushu Lake Hospital Affiliated to Soochow UniversitySuzhou 215000China.

This study aims to conduct a cost-effectiveness analysis of three different anesthesia strategies,namely chatting while under local anesthesia(Chat-LA),total intravenous anesthesia(TIVA),and general anesthesia with laryngeal mask airway(GA-LMA),employed in transperineal magnetic resonance imaging(MRI)/ultrasound(US)fusion prostate biopsy(TP-MUF-PB).A retrospective study was conducted involving 1202 patients who underwent TP-MUF-PB from June 2016 to April 2023 at The First Affiliated Hospital of Soochow University(Suzhou,China).Clinical data and outcomes,including total costs,complications,and quality-adjusted life years(QALYs),were *** sensitivity and subgroup analyses were also ***-LA was found to be the most cost-effective option,outperforming both TIVA and ***,subgroup analyses revealed that in younger patients(under 65 years old)and those with smaller prostate volumes(<40 ml),TIVA emerged as a more cost-effective *** Chat-LA may generally be the most cost-effective and safer anesthesia method for TP-MUF-PB,personalization of anesthesia strategies is crucial,considering specific patient demographics such as age and prostate volume.

关键词： anesthesia strategy cost-effectiveness analysis economic evaluation prostate biopsy prostate cancer

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我国高校外语教师对超语教学的态度及其影响因素

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外语界 2024年第1期 32-40页

作者：任伟才华北京航空航天大学外国语学院北京1000191

教师态度对超语实践发挥重要作用。本研究通过问卷调查我国高校外语教师对超语教学的态度及其可能的影响因素。结果显示,高校外语教师对超语教学整体持积极态度,非通用语专业教师的态度最为积极,英语专业教师的态度比公共英语教师积极,... 详细信息

教师态度对超语实践发挥重要作用。本研究通过问卷调查我国高校外语教师对超语教学的态度及其可能的影响因素。结果显示,高校外语教师对超语教学整体持积极态度,非通用语专业教师的态度最为积极,英语专业教师的态度比公共英语教师积极,但后两组教师的态度并无显著性差异。教师的年龄、教龄与其对超语教学的态度不显著相关。研究结果有助于超语研究理论框架完善和我国高校外语教师发展。

关键词：超语超语教学态度外语教师

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Sleep quality in middle-aged and elderly hemodialysis patients:Impact of a structured nursing intervention program

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World Journal of Clinical Cases 2024年第25期12卷 5713-5719页

作者： Ling-Ling Tao cai-hua Zeng Wen-Juan Mei Yan-Li Zou Blood Purification Room The First Affiliated Hospital of Nanchang UniversityNanchang 330006Jiangxi ProvinceChina

BACKGROUND Poor sleep quality is common among hemodialysis patients and can significantly impact their *** study aimed to evaluate the effectiveness of a structured nursing intervention program in improving sleep quality in middleaged and elderly hemodialysis *** To evaluate the impact of nursing intervention on sleep quality in hemodialysis *** This cross-sectional study was conducted in a tertiary hospital,the First Affiliated Hospital of Nanchang University,in *** study included 105 middle-aged and elderly hemodialysis patients aged≥45 years who underwent maintenance hemodialysis for at least 3 mo,utilizing the Pittsburgh Sleep Quality Index(PSQI)to identify poor *** identified underwent a 12-wk nursing intervention program focusing on education,relaxation techniques,and ***-intervention,sleep quality was reassessed using the *** The study found that 68.6%of hemodialysis patients were poor *** the 12-wk nursing intervention program,there was a significant decrease in the mean global PSQI score from 8.9±3.2 to 5.1±2.7(P<0.001),indicating improved sleep *** demonstrated the effectiveness of the structured nursing intervention in enhancing sleep quality for middle-aged and elderly hemodialysis *** The structured nursing intervention program focusing on sleep hygiene education,relaxation techniques,and counseling effectively improved sleep quality among middle-aged and elderly hemodialysis *** significant decrease in the mean global PSQI score post-intervention indicates the positive impact of tailored nursing interventions in addressing poor sleep quality in this patient *** findings emphasize the importance of implementing targeted nursing interventions to enhance the quality of life for hemodialysis patients by addressing the prevalent issue of poor sleep quality.

关键词： Hemodialysis patients Nursing intervention Sleep quality Elderly Pittsburgh Sleep Quality Index Patient wellbeing

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Normal pregnancy outcome after first-trimester exposure to semaglutide in an overweight woman: a case report

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Clinical Research Communications 2024年第2期7卷 30-33页

作者： Xi-Mei Zhu Qian-Yun huang Yue Chen Ying Zhou cai-hua Yang Clinical Pharmacy Center Nanfang HospitalSouthern Medical UniversityGuangzhou 510515China Department of Pharmacy Baiyun Branch of Nanfang HospitalSouthern Medical UniversityGuangzhou 510599China

We reported a case of an overweight 34-year-old woman who unexpectedly became pregnant while undergoing semaglutide in early pregnancy and delivered a healthy male infant by caesarean section at 37 weeks and 4 days of *** now,the safety of semaglutide for use during pregnancy was *** report may contribute to the limited knowledge available on pregnant women exposure to semaglutide.

关键词： case report glucagon-like peptide-1 receptor agonist semaglutide normal pregnancy outcome

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文化艺术产业赋能乡村振兴优化路径研究

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经济问题 2024年第9期 103-110页

作者：卫才华孙钰洁山西大学文学院山西太原030006

文化艺术产业赋能乡村振兴是提升乡村新发展格局、打造乡村文化艺术发展新业态、提振村民乡村振兴信心、追求更高质量乡村全面振兴的精神动力和新动能。通过聚焦文化艺术产业赋能乡村振兴的内在机理与动力,对文化艺术产业赋能乡村振兴... 详细信息

文化艺术产业赋能乡村振兴是提升乡村新发展格局、打造乡村文化艺术发展新业态、提振村民乡村振兴信心、追求更高质量乡村全面振兴的精神动力和新动能。通过聚焦文化艺术产业赋能乡村振兴的内在机理与动力,对文化艺术产业赋能乡村振兴的现实困境和原因进行深入剖析,并结合乡村振兴的实际情况,提出一系列文化艺术产业赋能乡村振兴的策略:发掘民间艺术活动,塑造乡村文化产业品牌;激发非遗传承活力,提升乡村经济新增长;艺术赋能乡村振兴,以产业集群助力乡村产业可持续发展;以数字经济引领乡村文化产业新质发展,为文化艺术产业赋能乡村振兴提供参考。

关键词：艺术乡村建设文化艺术产业可持续发展

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多智能体系统基于自适应控制下的二分-分量一致性

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控制与决策 2024年第5期39卷 1754-1760页

作者：华彩凤马忠军李科赞桂林电子科技大学数学与计算科学学院广西桂林541004 桂林电子科技大学广西应用数学中心广西桂林541004 桂林电子科技大学广西密码学与信息安全重点实验室广西桂林541004

二分-分量一致性是指网络系统中部分具有相似特性智能体的某些分量随时间推移趋于相同的值,而剩余智能体的某些分量则随时间趋于相反的值,是一种弱于恒同一致和二分一致的动力学行为.为此,对符号网络上非线性多智能体系统的二分-分量一... 详细信息

二分-分量一致性是指网络系统中部分具有相似特性智能体的某些分量随时间推移趋于相同的值,而剩余智能体的某些分量则随时间趋于相反的值,是一种弱于恒同一致和二分一致的动力学行为.为此,对符号网络上非线性多智能体系统的二分-分量一致性问题展开研究.首先,针对多智能体系统中各智能体之间存在的合作关系或竞争关系,设计有效的自适应牵制控制器;随后,基于Lyapunov稳定性理论和矩阵理论,导出该非线性系统二分-分量一致性得以实现的充分条件;最后,通过数值模拟验证理论结果.

关键词：网络系统非线性多智能体系统自适应控制二分-分量一致

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