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《产品设计程序与方法》课程项目化教学改革探索与实践 预览
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作者 金燕红 钱琳 《白城师范学院学报》 2019年第6期73-76,共4页
《产品设计程序与方法》是产品设计专业重要的专业课程,是承接专业基础课程与实践课程的重要纽带.本文立足于高校《产品设计程序与方法》课程教学现状,结合专业人才培养目标,以培养学生专业核心技能与职业综合素养为核心,引入项目化教... 《产品设计程序与方法》是产品设计专业重要的专业课程,是承接专业基础课程与实践课程的重要纽带.本文立足于高校《产品设计程序与方法》课程教学现状,结合专业人才培养目标,以培养学生专业核心技能与职业综合素养为核心,引入项目化教学模式进行教学改革,以期提高该课程教学质量,进而更好地培养应用型设计人才. 展开更多
关键词 产品开发 程序 项目化教学 教学改革
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检测实验室设备期间核查工作的探讨 预览
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作者 赵庭誉 《铁道技术监督》 2019年第8期17-19,共3页
为保证检测实验室出具的检验检测结果准确性,仪器设备的稳定性和可信度至关重要,有必要对仪器设备开展期间核查工作。实验室应制定相应程序,识别并确定需要开展期间核查的仪器设备,适时制定期间核查计划,选择适宜的核查方法,编制各设备... 为保证检测实验室出具的检验检测结果准确性,仪器设备的稳定性和可信度至关重要,有必要对仪器设备开展期间核查工作。实验室应制定相应程序,识别并确定需要开展期间核查的仪器设备,适时制定期间核查计划,选择适宜的核查方法,编制各设备的期间核查作业指导书,有效实施期间核查并分析核查结果,以促进实验室更好地开展期间核查工作,并满足国家有关部门对检测实验室的管理要求。 展开更多
关键词 检测实验室 期间核查 程序 方法
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基于构建流程的高职物流管理专业课程体系探析 预览
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作者 贺萍 《物流科技》 2019年第7期175-177,共3页
已完成规模快速扩张的物流专业建设需要进入提升内涵和质量阶段。文章从构建课程体系流程角度探讨高职物流管理专业课程体系存在的问题与对策。
关键词 流程 物流管理 问题与对策
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Optical characterization of defects in narrow-gap HgCdTe for infrared detector applications
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作者 越方禹 马骕驭 +4 位作者 洪进 杨平雄 敬承斌 陈晔 褚君浩 《中国物理B:英文版》 SCIE EI CAS CSCD 2019年第1期52-64,共13页
Narrow-gap Hg1-xCdx Te material with a composition x of about 0.3 plays an extremely important role in mid-infrared detection applications. In this work, the optical properties of doped HgCdTe with x ≈ 0.3 are review... Narrow-gap Hg1-xCdx Te material with a composition x of about 0.3 plays an extremely important role in mid-infrared detection applications. In this work, the optical properties of doped HgCdTe with x ≈ 0.3 are reviewed, including the defects and defect levels of intrinsic VHg and the extrinsic amphoteric arsenic(As) dopants, which can act as shallow/deep donors and acceptors. The influence of the defects on the determination of band-edge electronic structure is discussed when absorption or photoluminescence spectra are considered. The inconsistency between these two optical techniques is demonstrated and analyzed by taking into account the Fermi level position as a function of composition, doping level,conductivity type, and temperature. The defect level and its evolution, especially in As-doped HgCdTe, are presented. Our results provide a systematic understanding of the mechanisms and help for optimizing annealing conditions towards p-type As-activation, and eventually for fabricating high performance mid-infrared detectors. 展开更多
关键词 HGCDTE DEFECTS ANNEALING PROCEDURES optical characterization
Genre-based Language Teaching 预览
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作者 HAO Yan-ping 《海外英语》 2019年第14期268-269,共2页
For the past decades,genre-based language teaching has drawn an increasing attention from researchers and language teachers.It has been applied to more and more language teaching contexts.This paper aims to explain th... For the past decades,genre-based language teaching has drawn an increasing attention from researchers and language teachers.It has been applied to more and more language teaching contexts.This paper aims to explain this teaching approach from the following aspects:theories underlying it,design and teaching procedures.It also explores ways to apply this approach to English writing teaching. 展开更多
关键词 genre-based LANGUAGE TEACHING theory design TEACHING procedures
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Safety and efficacy of percutaneous transhepatic balloon dilation in removing common bile duct stones: A systematic review 预览
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作者 Yu-Liang Li Dong Li +3 位作者 Bin Liu Wu-Jie Wang Wei Wang Yong-Zheng Wang 《世界荟萃分析杂志》 2019年第4期162-169,共8页
BACKGROUND Endoscopic sphincterotomy (EST) is widely regarded as the first choice in the management of common bile duct (CBD) stones. However, for some patients, this treatment is not possible. The percutaneous transh... BACKGROUND Endoscopic sphincterotomy (EST) is widely regarded as the first choice in the management of common bile duct (CBD) stones. However, for some patients, this treatment is not possible. The percutaneous transhepatic balloon dilation (PTBD) technique has been suggested as an alternative but has yet to gain wide acceptance. AIM To review cases of PTBD for removing CBD stones and explore the safety and efficacy of this treatment. METHODS We conducted a systematic review using the Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines. We searched EMBASE, PubMed, and Web of Science for cases of PTBD that underwent CBD stone removal from 1981 to January 2019. We analyzed all relevant articles available in full text. We extracted data on patient’s age, gender, overall technique success rate, reasons for technique failure, and the presence and type of major and minor complications. We analyzed the data and reported the results in a table and text. Altogether, we retrieved 12 case series and 6 case reports, for a total of 1347 patients. Thirty cases were excluded due to a lack of patient data. RESULTS The overall technique success rate for removing a CBD stone was 98.5%(1327/1347) and 98.1%(109/111) for removing concurrent CBD and gallbladder stones. Based on available data (n = 1312), mean age of all patients (687 males and 625 females) was 68.9 years. The total number of procedures in the remaining 1317 patients (after exclusion) was 3237 (average 2.4 procedures per patient). The total number of failures for eliminating a CBD stone was 20, and the reasons for failure included: Stone impaction (n = 10), intrahepatic bile duct stricture (n = 5),large stone (n = 2), severe CBD dilation (n = 1), multiple stones (n = 1), and duodenal perforation (n = 1). Various major complications related to the procedure were reported, but the incidence rate was low (1.4%). No pancreatitis or procedure related mortality was reported. Minor complications including transient hyperamylasemia, nausea, vomiting 展开更多
关键词 Common bile duct stone PERCUTANEOUS TRANSHEPATIC approach Balloon DILATION INTERVENTIONAL procedures PAPILLA Endoscopic SPHINCTEROTOMY
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A study of attributable variables impacting orthopedic trauma surgical training
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作者 Rajeev Shukla Vishal Singh Champawat Ravi Kant Jain 《中华创伤杂志:英文版》 CAS CSCD 2019年第5期278-280,共3页
Purpose:In medical colleges,reside nt training programs must provide adequate surgical experiences,making them qualified at the end of residency program.It is generally believed that it would take more time for a surg... Purpose:In medical colleges,reside nt training programs must provide adequate surgical experiences,making them qualified at the end of residency program.It is generally believed that it would take more time for a surgical resident to perform surgical procedures than a board-certified surgeon.There is no current benchmark w让h regards to operative time and surgical cases involving orthopedic surgery residents.In this study,we focused on two key aspects of surgical training variables,namely,surgical duration&C-arm shoots when the procedure is done by a faculty surgeon in comparison to done by an orthopedic reside nt under supervision of faculty surgeon.Methods:It is an observational prospective study,we observed patients undergoing 1 of 5 common orthopedic trauma operations in a community teaching hospital.We recorded two variables,'skin to'skin surgical duration&number of image intensifier television/C-arm shoots of faculty surgeons and orthopedic resident(postgraduate-3yr)under supervision of faculty surgeon.We calculated mean difference of two variables with or without resident&determined statistical significance,we also compared functional outcome at final follow-up.Results:The total number of procedure observed was 402.On observing summarized results of all surgical procedures,faculty surgeons took on an average 33 min lesser(p<0.05)&on an average 37 lesser number of shoots(p<0.05)than resident surgeons.The difference in surgical duration tended to increase with the greater complexity of the surgical dissection.The difference in number of C-arm shoots tended to increase with the increase in surgical duration in closed procedures.In all the five procedures there was no significant difference(p>0.05)in functional outcome of cases performed by faulty surge on and resident.Conclusion:Little data has been previously published regarding the impact of teaching orthopedic resident in operating room.We demonstrate that resident participation increases the procedure time for commonly performed orthopedic procedures and 展开更多
关键词 ORTHOPEDICS SURGICAL TRAINING SURGICAL PROCEDURES RESIDENT TRAINING
美国高校互动课堂教学模式及启示——以俄亥俄州立大学“普通物理学”课程为例 预览
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作者 邓磊 《教师教育学报》 2019年第5期52-59,共8页
为了防止学生在“普通物理学”课堂上出现“习惯性学习”“思维止步”的恶性循环,提出互动课堂教学模式,并以美国俄亥俄州立大学(OSU)“普通物理学”课程为例,阐述了美国高校互动课堂教学模式的内涵、实施现状、实施程序以及师生对该教... 为了防止学生在“普通物理学”课堂上出现“习惯性学习”“思维止步”的恶性循环,提出互动课堂教学模式,并以美国俄亥俄州立大学(OSU)“普通物理学”课程为例,阐述了美国高校互动课堂教学模式的内涵、实施现状、实施程序以及师生对该教学模式的评价。借鉴美国高校互动课堂教学模式,我国高校的相关公共课程可通过进一步革新教学模式、转换师生角色、强化教学反思,实现真正意义上的互动课堂教学。 展开更多
关键词 互动课堂 教学模式 程序 评价 美国高校 普通物理学
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11例听骨链畸形的回顾性分析 被引量:1
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作者 陈亚琴 曾亮 +2 位作者 李朝霞 罗五根 江红群 《中国耳鼻咽喉头颈外科》 CSCD 2019年第3期160-162,共3页
目的 探讨先天性听骨链畸形的手术治疗效果。方法 回顾性分析11例听骨链畸形患者术前行颞骨CT、声导抗及纯音测听检查,对不同畸形部位或类型者行不同术式人工听骨听骨链重建术,术后随访2个月~1年,评估患者术后听力情况。结果 术前气导... 目的 探讨先天性听骨链畸形的手术治疗效果。方法 回顾性分析11例听骨链畸形患者术前行颞骨CT、声导抗及纯音测听检查,对不同畸形部位或类型者行不同术式人工听骨听骨链重建术,术后随访2个月~1年,评估患者术后听力情况。结果 术前气导平均听阈(0.5、1、2和4 kHz)为(59.6±10.0)dB HL,骨气导差(38.9±8.0)dB HL。术后2个月~1年复查气导平均听阈(45.3±16.0)dB HL,骨气导差为(22.5±10.0)dB HL。术后气导增益(14.3±9.0)dB HL,骨气导差增益(16.4±8.0)dB HL。11例中7例(64%)术后气导增益≥15 dB HL,4例(36%)术后气导增益<15 dB HL;8例(73%)术后骨气导差增益≥15 dB HL,3例(27%)术后骨气导差增益<15 dB HL。结论 人工听骨听骨链重建术是治疗听骨链畸形的方法之一。 展开更多
关键词 听小骨假体(Ossicular Prosthesis) 耳外科手术(Otologic SURGICAL Procedures) 聋(Deafness)
Neuromodulation and ablation with focused ultrasound– toward the future of noninvasive brain therapy 预览
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作者 Anton Fomenko Andres M.Lozano 《中国神经再生研究:英文版》 SCIE CAS CSCD 2019年第9期1509-1510,共2页
With an aging patient population and an increased burden of neurological disease,the demand for noninvasive alternatives to open neurosurgical procedures is imperative.Noninvasive or minimally invasive approaches to t... With an aging patient population and an increased burden of neurological disease,the demand for noninvasive alternatives to open neurosurgical procedures is imperative.Noninvasive or minimally invasive approaches to targeting brain regions include transcranial magnetic stimulation(TMS),transcranial direct current stimulation,temporally interfering electric fields,and focused ultrasound(FUS).Among these modalities,FUS offers a unique combination of target specificity,deep brain penetration,and compatibility with real-time structural and thermal monitoring using magnetic resonance imaging(MRI)and MR thermometry.Depending on the intensity and frequency used,ultrasound can have either modulating or ablative effects on brain tissue.High-intensity MR-guided FUS(MRgFUS)is a noninvasive and effective alternative to conventional deep-brain stimulation and radiofrequency lesioning for essential tremor(ET),and is being investigated for other movement disorders,particularly Parkinson’s disease.Wider clinical implementation of high-intensity ultrasound is challenged by limitations in target selection precision,technical barriers(such as variable penetration and heat deposition)and the possibility of lesion-related adverse effects(Schwartz et al.,2018).Emerging studies,including those from our group(Boutet et al.,2018)are striving to refine targeting of MRgFUS to improve safety and patient clinical outcomes.At the same time,low-intensity FUS(LIFUS)has been found to safely modulate brain activity in rodents,primates,and healthy human subjects(Fomenko et al.,2018).Clinical translation of LIFUS has been hampered however,by a poor understanding of the mechanisms of action,uncertainty over effective sonication parameters and intensities,and conflicting study results due to heterogeneous experimental protocols.In this perspective,the current state of both MRgFUS ablation and LIFUS neuromodulation will be presented.Ongoing technical challenges to delivering ultrasound to the brain,recent innovations in target and parameter selectio 展开更多
关键词 precision procedures PARKINSON human SAME FUS can HAS
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电子喉镜下氩气刀切除会厌囊肿
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作者 代得银 雒巧燕 《中国耳鼻咽喉头颈外科》 CSCD 2019年第2期104-105,共2页
目的探讨电子喉镜下氩气刀切除会厌囊肿的临床疗效。方法回顾性分析2014年1月~2018年9月80例会厌囊肿患者经电子喉镜下氩气刀切除的临床资料,所有患者均在表面麻醉下完成手术。结果 80例会厌囊肿患者一次性完整切除病变,术中出血量少,... 目的探讨电子喉镜下氩气刀切除会厌囊肿的临床疗效。方法回顾性分析2014年1月~2018年9月80例会厌囊肿患者经电子喉镜下氩气刀切除的临床资料,所有患者均在表面麻醉下完成手术。结果 80例会厌囊肿患者一次性完整切除病变,术中出血量少,手术时间5~30分钟,术后无发热、出血、呼吸困难、感染等并发症。随访3~36个月,无复发病例。结论电子喉镜下氩气刀切除会厌囊肿,电子喉镜可放大手术视野,手术视野清晰,可多角度观察无死角,氩气刀对组织损伤小,出血少基本达到无血操作,手术时间短,术后反应轻,恢复快,手术效果确切,无须全身麻醉,就医成本低,值得临床推广。 展开更多
关键词 会厌(Epiglottis) 囊肿(Cysts) 喉镜检查(Laryngoscopy) 外科手术(Surgical Procedures Operative)
清代湖北方志修志流程述略 预览
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作者 严忠良 《湖北职业技术学院学报》 2019年第2期54-58,共5页
方志编纂是一个系统工程,健全而有效的志书编纂流程不仅有助于地方志发展,也是保障志书质量的重要举措。清代湖北方志编纂过程包括设局聘贤,资料搜集和整理以及志书撰写、裁定、刊刻、管理等环节,形成了系统而有效的流程,是清代湖北方... 方志编纂是一个系统工程,健全而有效的志书编纂流程不仅有助于地方志发展,也是保障志书质量的重要举措。清代湖北方志编纂过程包括设局聘贤,资料搜集和整理以及志书撰写、裁定、刊刻、管理等环节,形成了系统而有效的流程,是清代湖北方志成就的重要体现。 展开更多
关键词 清代 湖北 修志 流程
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Trans-brachial artery access for coronary artery procedures is feasible and safe: data from a single-center in Macau
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作者 U Po Lam Edmundo Patricio Lopes Lao +2 位作者 Kan Chit Lam Mario Evora Na-Qiong Wu 《中华医学杂志:英文版》 SCIE CAS CSCD 2019年第12期1478-1481,共4页
Compared with trans-femoral artery access (TFA), trans-radial artery access (TRA) for percutaneous coronary interventions (PCI) has been shown to significantly reduce 30-day mortality, in-hospital major adverse cardia... Compared with trans-femoral artery access (TFA), trans-radial artery access (TRA) for percutaneous coronary interventions (PCI) has been shown to significantly reduce 30-day mortality, in-hospital major adverse cardiac and cardiovascular events (a composite of 30-day mortality and in-hospital myocardial re-infarction, target vessel revascularization, and cerebrovascular events), major bleeding, and access site complications.[1] TRA is more easily compressible, minimizing hematoma risk, and lower crossover rates to another access. Patients may ambulate immediately after procedure, that hospitalization can be shortened significantly. In some centers, patient with TRA can be discharged on the same day of procedure. It is also superior to TFA with closure devices, and becomes the preferred access site for recent PCI.[2] 展开更多
关键词 Trans-brachial ARTERY ACCESS coronary ARTERY PROCEDURES
The Teaching Design of How Life Began On The Earth 预览
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作者 丁彩霞 《新东方英语:中英文版》 2019年第6期10-11,共2页
Summary:This paper investigated a teaching design of a reading material in Book 3 from the senior high school stage,in which the author analyzed the teaching materials first,then talked about the teaching goals and th... Summary:This paper investigated a teaching design of a reading material in Book 3 from the senior high school stage,in which the author analyzed the teaching materials first,then talked about the teaching goals and the teaching procedures with purposes in de-tails.At last,the author reflected on the whole class carefully and responsibly. 展开更多
关键词 TEACHING MATERIAL analysis TEACHING procedures& purposes REFLECTION
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Evaluation of CdZnTe spectrometer performance in measuring energy spectra during interventional radiology procedure 预览
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作者 Lin Chai Lian Chen +7 位作者 Cui-Ping Yang Dong-Dong Zhou Meng-Meng Yang Wei-Wei Qu Gao-Long Zhang Da-Qian Hei Shou-Ping Xu Xin-Jian Chen 《核技术:英文版》 SCIE CAS CSCD 2019年第9期55-60,共6页
Interventional radiology has been beneficial for patients for over 30 years of age with the combination of diagnostic and therapeutic methods. The radiation affecting occupationally exposed workers should be evaluated... Interventional radiology has been beneficial for patients for over 30 years of age with the combination of diagnostic and therapeutic methods. The radiation affecting occupationally exposed workers should be evaluated by means of the energy spectra and flux of X-rays in the treatment room. The present study aims to obtain the energy spectra of interventional procedures and study the capability of some detectors to evaluate the dose in interventional procedures. These measurements were taken by silicon-drift, CdTe, and CdZnTe detectors. The energy spectra were corrected by the energy-response curve of each detector. The energy-response curves of silicon-drift and CdTe detectors provided by the manufacturers specification were used. The energy response of the CdZnTe detector was measured by 133Ba and 152Eu γ sources. The experimental data were compared with the simulation results, and their perfect agreement provides a way to correct the energy or dose response, which can be used for the personal dosimeter developed by our group. Moreover, the measured energy spectra can be used in individual radiation protection. The present study shows that the CdZnTe detector is a good candidate detector in interventional procedures. 展开更多
关键词 INTERVENTIONAL RADIOLOGY procedures Energyresponse CURVE Energy SPECTRUM Radiation protection
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Analysis of the factors influencing hospitalization charges for neonatal congenital heart disease
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作者 陈晨 邓力 樊慧峰 《岭南心血管病杂志:英文版》 CAS 2019年第2期86-94,116共10页
Background Congenital heart disease(CHD)is the most common congenital anomaly affecting 1.35 million newborns globally every year.Children affected by CHD would normally come across growth failure at a young age.As co... Background Congenital heart disease(CHD)is the most common congenital anomaly affecting 1.35 million newborns globally every year.Children affected by CHD would normally come across growth failure at a young age.As complex CHD has a high mortality rate,it needs to be corrected as soon as possible after birth.Methods The medical records of infants with diagnosed CHD according to International Classification of Diseases(ICD)10 th Revision codes(January 2009-June 2017)who underwent cardiac surgery were reviewed.In the 431 patients who met the study criteria,their clinical characteristics,outcomes and cost data were collected.Linear regression models were used to determine the hospitalization cost after adjustment for demographic and other risk factors.Results For the 431 patients who met the study criteria,the median hospital stay was 24 days(range 17~34 days),which was not significantly changed over 9 years.The median inflation-adjusted total hospital cost was ¥80634(range ¥ 64585~97831),which was on the increase.The predominant influential factors of hospitalization expenses were hospitalization days,hospitalization deaths,European surgical scores,postsurgical complications and preoperative ventilator assistance.The least amount of hospitalization expenses was spent when hospitalization stay≤10 days and ARISTOTLE surgery total score≤12.25.Hospitalization expenses were related to hospitalization days when it was 10 days to 24 days.The expenses of deaths were higher than the survivors when hospitalization stay was 25 days to 48 days,the number of postsurgical complications≥1.The expenses of deaths reached the highest when the hospital stay≥49 days with the number of postsurgical complications≥3.Conclusion The hospitalization expense of neonate’s CHD has been increasing in recent years.Different hospitalization stays and surgical procedure difficulties,postsurgical complications and hospital deaths could affect the total cost of hospitalization. 展开更多
关键词 CONGENITAL heart defect cardiac surgical procedures NEONATE hospital CHARGES
Primate stem cells: bridge the translation from basic research to clinic application
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作者 Tianqing Li Zongyong Ai Weizhi Ji 《中国科学:生命科学英文版》 SCIE CAS CSCD 2019年第1期12-21,共10页
A growing body of literature has shown that stem cells are very effective for the treatment of degenerative diseases in rodents but these exciting results have not translated to clinical practice. The difference resul... A growing body of literature has shown that stem cells are very effective for the treatment of degenerative diseases in rodents but these exciting results have not translated to clinical practice. The difference results from the divergence in genetic, metabolic, and physiological phenotypes between rodents and humans. The high degree of similarity between non-human primates(NHPs) and humans provides the most accurate models for preclinical studies of stem cell therapy. Using a NHP model to understand the following key issues, which cannot be addressed in humans or rodents, will be helpful for extending stem cell applications in the basic science and the clinic. These issues include pluripotency of primate stem cells, the safety and efficiency of stem cell therapy, and transplantation procedures of stem cells suitable for clinical translation. Here we review studies of the above issues in NHPs and current challenges of stem cell applications in both basic science and clinical therapies. We propose that the use of NHP models, in particular combining the serial production and transplantation procedures of stem cells is the most useful for preclinical studies designed to overcome these challenges. 展开更多
关键词 non-human PRIMATE PLURIPOTENT STEM cells MONKEY disease model STEM cell therapy PLURIPOTENCY state transition transplantation procedures
Optimized protocol of multiple post-processing techniques improves diagnostic accuracy of multidetector computed tomography in assessment of small bowel obstruction compared with conventional axial and coronal reformations 预览
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作者 Lian-Qin Kuang Wei Tang +3 位作者 Ran Li Cheng Cheng Shuang-Yue Tang Yi Wang 《世界胃肠病学杂志:英文版》 SCIE CAS 2019年第9期1100-1115,共16页
BACKGROUND Axial and coronal reformations have been a widely used image post-processing protocol for the ordinary multidetector computed tomography(MDCT)examination of patients with small bowel obstruction(SBO)or othe... BACKGROUND Axial and coronal reformations have been a widely used image post-processing protocol for the ordinary multidetector computed tomography(MDCT)examination of patients with small bowel obstruction(SBO)or other abdominal diseases.The diagnostic accuracy of MDCT for assessing SBO is expected to be further improved through the use of multiple post-processing techniques.AIM To systemically evaluate the diagnostic accuracy and efficiency of an optimized protocol using multiple post-processing techniques for MDCT assessment of SBO and secondary bowel ischemia.METHODS This retrospective cross-sectional study included 106 patients with clinically suspected SBO.Two readers applied three protocols to image post-processing and interpretation of patients’MDCT volume data.We compared the three protocols based on time spent,number of images,diagnostic self-confidence,agreement,detection rate,and accuracy of detection of SBO and secondary bowel ischemia.RESULTS Protocol 2 resulted in more time spent and number of images than protocols 1 and 3(P<0.01),but the results of the two readers using the same protocol were not different(P>0.05).Using protocol 3,both readers added multiple postprocessing techniques at frequencies of 29.2%and 34.9%,respectively,for obstruction cause,and 32.1%and 30.2%,respectively,for secondary bowel ischemia.Protocols 2 and 3 had higher total detection rates of obstruction cause and secondary bowel ischemia than protocol 1(P<0.01),but no difference was detected between protocols 2 and 3(P>0.05).The accuracy,sensitivity,specificity,positive predictive value and negative predictive value of protocols 2 and 3 were superior to those of protocol 1 for evaluating obstruction cause and secondary bowel ischemia.CONCLUSION Our optimized protocol of multiple post-processing techniques can both guarantee efficiency and improve diagnostic accuracy of MDCT for assessing SBO and secondary bowel ischemia. 展开更多
关键词 INTESTINE Intestinal OBSTRUCTION MULTIDETECTOR computed tomography Diagnostic TECHNIQUES and procedures
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Mini-invasive vs open resection of colorectal cancer and liver metastases: A meta-analysis 预览
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作者 Shan-Ping Ye Hua Qiu +2 位作者 Shi-Jun Liao Jun-Hua Ai Jun Shi 《世界胃肠病学杂志:英文版》 SCIE CAS 2019年第22期2819-2832,共14页
BACKGROUND The safety and feasibility of the simultaneous resection of primary colorectal cancer (CRC) and synchronous colorectal liver metastases (SCRLM) have been demonstrated in some studies. Combined resection is ... BACKGROUND The safety and feasibility of the simultaneous resection of primary colorectal cancer (CRC) and synchronous colorectal liver metastases (SCRLM) have been demonstrated in some studies. Combined resection is expected to be the optimal strategy for patients with CRC and SCRLM. However, traditional laparotomy is traumatic, and the treatment outcome of minimally invasive surgery (MIS) is still obscure. AIM To compare the treatment outcomes of MIS and open surgery (OS) for the simultaneous resection of CRC and SCRLM. METHODS A systematic search through December 22, 2018 was conducted in electronic databases (PubMed, EMBASE, Web of Science, and Cochrane Library). All studies comparing the clinical outcomes of MIS and OS for patients with CRC and SCRLM were included by eligibility criteria. The meta-analysis was performed using Review Manager Software. The quality of the pooled study was assessed using the Newcastle-Ottawa scale. The publication bias was evaluated by a funnel plot and the Begg’s and Egger’s tests. Fixed- and random-effects models were applied according to heterogeneity. RESULTS Ten retrospective cohort studies involving 502 patients (216 patients in the MIS group and 286 patients in the OS group) were included in this study. MIS was associated with less intraoperative blood loss [weighted mean difference (WMD)=-130.09, 95% confidence interval (CI):-210.95 to -49.23, P = 0.002] and blood transfusion [odds ratio (OR)= 0.53, 95%CI: 0.29 to 0.95, P = 0.03], faster recovery of intestinal function (WMD =-0.88 d, 95%CI:-1.58 to -0.19, P = 0.01) and diet (WMD =-1.54 d, 95%CI:-2.30 to -0.78, P < 0.0001), shorter length of postoperative hospital stay (WMD =-4.06 d, 95%CI:-5.95 to -2.18, P < 0.0001), and lower rates of surgical complications (OR = 0.60, 95%CI: 0.37 to 0.99, P = 0.04). However, the operation time, rates and severity of overall complications, and rates of general complications showed no significant differences between the MIS and OS groups. Moreover, the overall survival and disease-fr 展开更多
关键词 MINIMALLY INVASIVE surgical procedures LAPAROTOMY Colorectal neoplasms Synchronous liver METASTASES META-ANALYSIS
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The radiation structure of PSR B2016+28 observed with FAST
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作者 JiGuang Lu Bo Peng +8 位作者 RenXin Xu Meng Yu Shi Dai WeiWei Zhu Ye-Zhao Yu Peng Jiang YouLing Yue Lin Wang FAST Collaboration 《中国科学:物理学、力学、天文学英文版》 SCIE EI CAS CSCD 2019年第5期38-51,共14页
With the largest dish Five-hundred-meter Aperture Spherical radio Telescope(FAST), both the mean and single pulses of PSR B2016+28, especially including the single-pulse structure, are investigated in detail in this s... With the largest dish Five-hundred-meter Aperture Spherical radio Telescope(FAST), both the mean and single pulses of PSR B2016+28, especially including the single-pulse structure, are investigated in detail in this study. The mean pulse profiles at different frequencies can be well fitted in a conal model, and the peak separation of intensity-dependent pulse profiles increases with intensity. The integrated pulses are obviously frequency dependent(pulse width decreases by ~20% as frequency increases from 300 to 750 MHz), but the structure of single pulses changes slightly(the corresponding correlation scale decreases by only~1%). This disparity between mean and single pulses provides independent evidence for the existence of the RS-type vacuum inner gap, indicating a strong bond between particles on the pulsar surface. Diffused drifting sub-pulses are analyzed. The results show that the modulation period along pulse series(P3) is positively correlated to the separation between two adjacent sub-pulses(P2). This correlation may hint a rough surface on the pulsar, eventually resulting in the irregular drift of sparks. All the observational results may have significant implications in the dynamics of pulsar magnetosphere and are discussed extensively in this paper. 展开更多
关键词 radiation mechanisms MATHEMATICAL procedures and COMPUTER techniques radio PULSARS
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