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Imaged guided surgery during arteriovenous malformation of gastrointestinal stromal tumor using hyperspectral and indocyanine green visualization techniques:A case report
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作者 Tristan Wagner Onur Mustafov +6 位作者 Marielle Hummels Anders Grabenkamp Michael N Thomas Lars Mortimer Schiffmann Christiane J Bruns Dirk L Stippel Roger Wahba 《World Journal of Clinical Cases》 SCIE 2023年第23期5530-5537,共8页
BACKGROUND This case report demonstrates the simultaneous development of a gastrointestinal stromal tumour(GIST)with arteriovenous malformations(AVMs)within the jejunal mesentery.A 74-year-old male presented to the de... BACKGROUND This case report demonstrates the simultaneous development of a gastrointestinal stromal tumour(GIST)with arteriovenous malformations(AVMs)within the jejunal mesentery.A 74-year-old male presented to the department of surgery at our institution with a one-month history of abdominal pain.Contrast-enhanced computed tomography revealed an AVM.During exploratory laparotomy,hyperspectral imaging(HSI)and indocyanine green(ICG)fluorescence were used to evaluate the extent of the tumour and determine the resection margins.Intraoperative imaging confirmed AVM,while histopathological evaluation showed an epithelioid,partially spindle cell GIST.CASE SUMMARY This is the first case reporting the use of HSI and ICG to image GIST intermingled with an AVM.The resection margins were planned using intraoperative analysis of additional optical data.Image-guided surgery enhances the clinician’s knowledge of tissue composition and facilitates tissue differentiation.CONCLUSION Since image-guided surgery is safe,this procedure should increase in popularity among the next generation of surgeons as it is associated with better postoperative outcomes. 展开更多
关键词 Imaged guided surgery Hyperspecteral imaging Gastrointestinal stromal tumour Arteriovenous malformation case report
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Improved guided bone regeneration by combined application of unmodified, fresh autologous adipose derived regenerative cells and plasma rich in growth factors:A first-in-human case report and literature review 被引量:4
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作者 ?nder Solakoglu Werner G?tz +3 位作者 Maren C Kiessling Christopher Alt Christoph Schmitz Eckhard U Alt 《World Journal of Stem Cells》 SCIE CAS 2019年第2期124-146,共23页
BACKGROUND Novel strategies are needed for improving guided bone regeneration(GBR) in oral surgery prior to implant placement, particularly in maxillary sinus augmentation(GBR-MSA) and in lateral alveolar ridge augmen... BACKGROUND Novel strategies are needed for improving guided bone regeneration(GBR) in oral surgery prior to implant placement, particularly in maxillary sinus augmentation(GBR-MSA) and in lateral alveolar ridge augmentation(LRA). This study tested the hypothesis that the combination of freshly isolated, unmodified autologous adipose-derived regenerative cells(UA-ADRCs), fraction 2 of plasma rich in growth factors(PRGF-2) and an osteoinductive scaffold(OIS)(UAADRC/PRGF-2/OIS) is superior to the combination of PRGF-2 and the same OIS alone(PRGF-2/OIS) in GBR-MSA/LRA.CASE SUMMARY A 79-year-old patient was treated with a bilateral external sinus lift procedure as well as a bilateral lateral alveolar ridge augmentation. GBR-MSA/LRA was performed with UA-ADRC/PRGF-2/OIS on the right side, and with PRGF-2/OIS on the left side. Biopsies were collected at 6 wk and 34 wk after GBRMSA/LRA. At the latter time point implants were placed. Radiographs(32 mo follow-up time) demonstrated excellent bone healing. No radiological or histological signs of inflammation were observed. Detailed histologic,histomorphometric, and immunohistochemical analysis of the biopsies evidenced that UA-ADRC/PRGF-2/OIS resulted in better and faster bone regeneration than PRGF-2/OIS.CONCLUSION GBR-MSA with UA-ADRCs, PRGF-2, and an OIS shows effectiveness without adverse effects. 展开更多
关键词 case report Cell-based therapy guided bone regeneration Maxillary sinus augmentation Lateral alveolar ridge augmentation Unmodified autologous adipose-derived regenerative cells Stem cells
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Ultrasound-guided fascia iliaca compartment block combined with general anesthesia for amputation in an acute myocardial infarction patient after percutaneous coronary intervention: A case report 被引量:2
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作者 Chen Ling Xing-Qing Liu +3 位作者 Yi-Qun Li Xian-Jie Wen Xu-Dong Hu Kai Yang 《World Journal of Clinical Cases》 SCIE 2019年第17期2567-2572,共6页
BACKGROUND Fascia iliaca compartment block is a technique that blocks three nerves,similar to a 3-in-1 nerve block.This block provides analgesia for patients undergoing lower limb surgery,and is a simple technique tha... BACKGROUND Fascia iliaca compartment block is a technique that blocks three nerves,similar to a 3-in-1 nerve block.This block provides analgesia for patients undergoing lower limb surgery,and is a simple technique that is easy to implement.Here,we report a case of fascia iliaca compartment block in a patient with myocardial infarction who underwent emergency middle thigh amputation.CASE SUMMARY A 78-year-old female patient weighing 38 kg with gangrene and occlusive peripheral atherosclerosis of the right leg underwent an emergency middle thigh amputation.The patient had a history of hypertension,coronary heart disease,cerebral infarction,anterior wall myocardial infarction,and had recently undergone percutaneous coronary intervention consisting of coronary angiography and right coronary artery stent implantation.Considering the patient's condition,an ultrasound-guided fascia iliaca compartment block combined with general anesthesia was implemented for amputation.The fascia iliaca compartment block provided analgesia for the operation,and reduced the dosage of general anesthetics.It also alleviated adverse cardiovascular effects caused by pain stress,and ensured the safety of the patient during the perioperative period.This block also provided postoperative analgesia.The patient had a good prognosis,and was subsequently discharged from hospital.CONCLUSION Fascia iliaca compartment block provides surgical analgesia.It also alleviates adverse cardiovascular effects,and ensures patient safety during the perioperative period. 展开更多
关键词 ULTRASOUND-guided FASCIA iliaca COMPARTMENT BLOCK Acute myocardial INFARCTION case report Percutaneous coronary intervention
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Cardiac involvement in disseminated diffuse large B-cell lymphoma,successful management with chemotherapy dose reduction guided by cardiac imaging: A case report and review of literature 被引量:1
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作者 Rabah Al-Mehisen Maha Al-Mohaissen Hisham Yousef 《World Journal of Clinical Cases》 SCIE 2019年第2期191-202,共12页
BACKGROUND Secondary cardiac involvement by lymphoma has received limited attention in the medical literature, despite its grave prognosis. Although chemotherapy improves patients' survival, a subgroup of treated ... BACKGROUND Secondary cardiac involvement by lymphoma has received limited attention in the medical literature, despite its grave prognosis. Although chemotherapy improves patients' survival, a subgroup of treated patients dies suddenly due to myocardial rupture following chemotherapy initiation. Reducing the initial chemotherapy dose with dose escalation to standard doses may be effective in minimizing this risk but the data are limited. We report on the successful management of a patient with disseminated diffuse large B-cell lymphoma(DLBCL) involving the heart using such approach.CASE SUMMARY An 18-year-old male presented to our hospital with six months history of progressive dyspnea, orthopnea and cough. On physical examination, the patient was found to have a plethoric and mildly edematous face, fixed elevation of the right internal jugular vein, suggestive of superior vena cava obstruction, and a pelvic mass. Investigations during admission including a thoracoabdominal computed tomography(CT) scan with CT guided biopsy of the pelvic mass,echocardiography and cardiac magnetic resonance imaging led to the diagnosis of disseminated DLBCL with cardiac involvement. The patients were successfully treated with chemotherapy dose reduction followed by dose escalation to standard doses, under the guidance of cardiac imaging. The patient completed chemotherapy and underwent a successful bone marrow transplant. He is currently in remission and has a normal left ventricular function.CONCLUSION Imaging-guided chemotherapy dosing may minimize the risk of myocardial rupture in cardiac lymphoma. Data are limited. Management should be individualized. 展开更多
关键词 Diffuse large B-cell LYMPHOMA CARDIAC LYMPHOMA CARDIAC IMAGING CARDIAC magnetic resonance IMAGING Myocardial rupture Imaging-guided CHEMOTHERAPY case report
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A Case Report of Immediate Implant Placement Combined with Flap Surgery,Guided Bone Regeneration and Non-submerged Healing with a Labial Bone Wall Defect in the Esthetic Zone
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作者 Lu LIU Wenhui YU +2 位作者 Xitao LI Hui ZHAO Jianjun YANG 《Medicinal Plant》 CAS 2021年第4期53-55,60,共4页
[Basckground]This case report presented a methodology for immediate implantation in the esthetic zone with a facial bone defect along with flap surgery,guided bone regeneration,and non-submerged healing.[Case presenta... [Basckground]This case report presented a methodology for immediate implantation in the esthetic zone with a facial bone defect along with flap surgery,guided bone regeneration,and non-submerged healing.[Case presentation]A 27-year-old female patient was complaining of the aesthetic complication that was caused via metallic staining of the neck of ceramic crowns in the maxillary right anterior region for one year.She has experienced immediate implantation along with flap surgery,guided bone regeneration(GBR),and non-submerged healing.The torque of the implant reached to the 35 N·cm to confirm primary stability.Six months after surgery,the healing abutment and the implant were fixed,the gingiva was healthy in the surgical area,and the nearby teeth and the opposite teeth were normal.[Results]The results of cone-beam computer tomography(CBCT)revealed that bone defects were filled with the newly formed bone.At the same time,the final impressions accomplished,and an all-ceramic crown was fit-placed.As a whole,the patient satisfaction rate was high.[Conclusions]Immediate implant placement with flap surgery,GBR,and non-submerged healing with a facial bone wall defect in the esthetic zone is an achievable process. 展开更多
关键词 case report Immediate implants Labial bone defect Flap surgery guided bone regeneration Non-submerged healing
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Application of digital positioning guide plates for the surgical extraction of multiple impacted supernumerary teeth:A case report and review of literature 被引量:5
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作者 Zhi Wang Shu-Yi Zhao +5 位作者 Wu-Shu He Fan Yu Shao-Jie Shi Xue-Ling Xia Xin-Xiao Luo Yu-Hong Xiao 《World Journal of Clinical Cases》 SCIE 2022年第27期9886-9896,共11页
BACKGROUND An extra tooth in the normal tooth sequence in any region of the dental arch is regarded as a supernumerary tooth(SNT).Due to the large variation in location and morphology,the extraction of impacted SNTs i... BACKGROUND An extra tooth in the normal tooth sequence in any region of the dental arch is regarded as a supernumerary tooth(SNT).Due to the large variation in location and morphology,the extraction of impacted SNTs is an extensive and complex procedure with high risks of several complications.This report presents a rare case of seven impacted SNTs in the bilateral upper and lower arch that were successfully extracted with the use of digital positioning guide plates.CASE SUMMARY In January 2022,a 21-year-old male was referred to our department with a chief complaint of pain in relation to tooth#36.Clinical examination showed a deep carious lesion with pulpal involvement in tooth#36 and lingual swelling of the bilateral mandibular posterior area.Radiographic examination revealed seven deeply impacted SNTs in the bilateral posterior area and bilateral impacted mandibular third molars.Based on these findings,the patient was diagnosed with bilateral,multiple impacted SNTs and tooth#36 chronic pulpitis.A root canal treatment and an all-ceramic crown restoration for tooth#36 were performed.An individualized digital positioning guide plate was designed by computer-aided design/computer-aided manufacturing technology and cone-beam computed tomography for extraction of the impacted SNTs.During the operation,the digital positioning guide plate allowed rapid positioning and exposure of the SNTs while avoiding adjacent important anatomical structures.At 3-month follow-up,regeneration of bone and soft tissues was visible.CONCLUSION The application of digital positioning guide plates is useful for the individualized and minimalized extraction of impacted supernumerary teeth. 展开更多
关键词 Supernumerary teeth Computer aided design/computer aided manufacturing DIGITAL Surgical guide Minimal invasion case report
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Analysis of the Case Records of Five Elements in Linzheng Zhinan Yi'an(Guide to Clinical Practice)
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作者 DAI Yong-sheng FU Jie 《中华中医药学刊》 CAS 2008年第1期36-39,共4页
Basis of seventy-seven case records of twenty-six diseases in Linzheng Zhinan Yi'an(Guide to Clinical Practice),analyze and distinguish them into four types.They are disorder of the mother-organ affecting the chil... Basis of seventy-seven case records of twenty-six diseases in Linzheng Zhinan Yi'an(Guide to Clinical Practice),analyze and distinguish them into four types.They are disorder of the mother-organ affecting the child-organ,disorder of the child-organ affecting the mother-organ,over restraint and reverse restraint.The essence of this article is to recognize the pathological transmission among the Zang-fu organs according to the theory of five elements. 展开更多
关键词 病例 五行学说 疑难杂症 辨证论治 中医 临床实践
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Removal of a pulmonary artery foreign body during pulse ablation in a patient with atrial fibrillation:A case report
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作者 Rui Yan Xin-Yu Lei +2 位作者 Jun Li Liang-Liang Jia Hai-Xiong Wang 《World Journal of Clinical Cases》 SCIE 2023年第27期6587-6591,共5页
BACKGROUND Foreign bodies in the pulmonary circulation have been documented in the literature and are typically caused by interventional procedures.However,reports of pulmonary artery foreign bodies during femoral vei... BACKGROUND Foreign bodies in the pulmonary circulation have been documented in the literature and are typically caused by interventional procedures.However,reports of pulmonary artery foreign bodies during femoral vein puncture are rare,and there is no description of this complication from the guidewire surface flows into the pulmonary artery during a pulse ablation in a patient with atrial fibrillation.CASE SUMMARY We described a case in which a linear foreign body suddenly appeared on fluoroscopy image during pulsed ablation of atrial fibrillation.Multiposition angiography showed that the foreign body was currently lodged in the pulmonary artery but was hemodynamically stable.We then chose to use an interventional approach to remove the foreign body from the pulmonary artery.This foreign body was subsequently confirmed to be from the hydrophilic coating of the guidewire surface.This may be related to the difficulties encountered during the puncture of the femoral vein.This is a rare and serious complication of femoral vein puncture.Therefore,we reported this case in order to avoid a similar situation.CONCLUSION Mismatches between interventional devices from different manufacturers used for femoral venipuncture may result in pulmonary artery foreign bodies. 展开更多
关键词 Femoral vein puncture Atrial fibrillation guide wire COMPLICATION Pulmonary artery foreign body case report
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指导性案例制度的运行思路再定位 被引量:1
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作者 毕潇潇 《云南社会科学》 CSSCI 北大核心 2024年第2期26-36,共11页
指导性案例制度旨在通过各级法院参照适用前案的方式,推进法律适用的统一。但该制度的运行存在效力不明确、供给量不足、适用范围不广等诸多问题。鉴于遵循先例以实现同案同判的运行机制与指导性案例以确保法律适用统一的运行机制具有... 指导性案例制度旨在通过各级法院参照适用前案的方式,推进法律适用的统一。但该制度的运行存在效力不明确、供给量不足、适用范围不广等诸多问题。鉴于遵循先例以实现同案同判的运行机制与指导性案例以确保法律适用统一的运行机制具有相似性,通过分析判例法上遵循先例的运行条件,融入指导性案例的运行环境观察其运行效果,发现由于两者的法律适用逻辑存在根本性差异,指导性案例制度实现法律适用统一的效率性、稳定性、权威性和发展性等方面皆不尽如人意。指导性案例应当回归其指导示范价值而非硬性拘束,并围绕覆盖司法分歧和增加案例竞争,完善相应的遴选与退出机制。 展开更多
关键词 指导性案例 遵循先例 同案同判 法律适用统一 运行机制
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《临证指南医案》自汗证治探析
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作者 姚军 刘倩 谢雪姣 《亚太传统医药》 2024年第1期208-211,共4页
自汗是特殊汗出的一种类型,该病易见而难治。基于清代名家叶天士之《临证指南医案》,深入阐析自汗之定义、病机、治法,总结叶天士杂症自汗证治特色及具体方药,并据此探讨特殊自汗证型,进一步丰富临床汗证诊疗经验。
关键词 《临证指南医案》 叶天士 自汗 病机 治法
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刑事指导性案例的理性重塑与类案判断
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作者 王晓 李力军 《浙江理工大学学报(社会科学版)》 2024年第5期599-606,共8页
同案同判作为一种形式意义上的司法要求,并不能充分说明待决案件援引指导性案例进行裁判的正当性基础,需要一般性规则对其进行实质性的补充。法律领域的类比推理要求一般性规则需要具有合法律性与规范性两种特质。刑法构成要件作为类型... 同案同判作为一种形式意义上的司法要求,并不能充分说明待决案件援引指导性案例进行裁判的正当性基础,需要一般性规则对其进行实质性的补充。法律领域的类比推理要求一般性规则需要具有合法律性与规范性两种特质。刑法构成要件作为类型思维在具体部门法中的产物,能够成为刑事裁判领域的一般性规则。这一规则在对构成要件要素的解释过程中不断具体化,并使得刑法理论与刑事司法呈现出类型化的思考倾向。严格意义上的类案判断标准过于强调整体事实,限缩了指导性案例的适用范围,无法满足刑事司法的实践需求。以刑法构成要件要素为指引,能够建立一种宽容意义上的类案概念,并以动态的类案判断方式激活刑事指导性案例的制度活性。 展开更多
关键词 同案同判 一般性规则 类比推理 刑事指导性案例 构成要件要素
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基于OBE理论的案例引导式C语言程序设计实验课程教学改革研究
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作者 刘怡 《实验科学与技术》 2024年第3期94-99,共6页
为了突破C语言程序设计实验教学的难点,基于成果导向教育(OBE)理论对C语言程序设计实验课程进行了教学改革:通过实验教学的模式改革,加强实验教学的结果导向,突出实验教学的学生主体作用,完善实验教学的组织方式;通过引导案例的设计、... 为了突破C语言程序设计实验教学的难点,基于成果导向教育(OBE)理论对C语言程序设计实验课程进行了教学改革:通过实验教学的模式改革,加强实验教学的结果导向,突出实验教学的学生主体作用,完善实验教学的组织方式;通过引导案例的设计、引导案例与实验项目的耦合以及引导案例在实验教学中的应用,实现实验教学方法的改革与实验教学内容的更新。实践结果表明,C语言程序设计实验课程的教学改革,优化了实验课程的教学目标,强化了计算机程序设计类实验课程教学创新的理论基础,提高了实验课程的教学质量。 展开更多
关键词 C语言 OBE理论 实验教学 案例引导
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现代火炮内弹道面临的问题与对策
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作者 余永刚 《弹道学报》 CSCD 北大核心 2024年第3期1-11,共11页
从现代火炮及弹药技术的发展趋势,分析了火炮内弹道面临的问题,阐述了火炮内弹道理论与技术的发展方向,集中体现在三个方面,一是提高常规固体发射药火炮的作战效能;二是发展与制导弹药等特种弹药发射方式相适应的内弹道理论与控制技术;... 从现代火炮及弹药技术的发展趋势,分析了火炮内弹道面临的问题,阐述了火炮内弹道理论与技术的发展方向,集中体现在三个方面,一是提高常规固体发射药火炮的作战效能;二是发展与制导弹药等特种弹药发射方式相适应的内弹道理论与控制技术;三是研究新能源火炮的内弹道理论与控制技术。在此基础上,结合国内外研究状况,对若干重点问题进行了述评,并提出了研究对策。 展开更多
关键词 火炮 内弹道 弹丸挤进过程 模块装药 制导弹药 埋头弹药 液体发射药火炮
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“电气传动课程设计”引导式教学
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作者 张婷 刘瑞静 吴美杰 《电气电子教学学报》 2024年第2期205-207,共3页
传统的“电气传动课程设计”缺乏具有实际背景的实践项目,导致学生学习热情不高,知识掌握不牢固。为了培养学生探究式自主学习能力,开发了基于项目案例的实验内容,研究了具体案例的设计任务和要求,运用翻转式教学形式,实现线上线下混合... 传统的“电气传动课程设计”缺乏具有实际背景的实践项目,导致学生学习热情不高,知识掌握不牢固。为了培养学生探究式自主学习能力,开发了基于项目案例的实验内容,研究了具体案例的设计任务和要求,运用翻转式教学形式,实现线上线下混合式学习;为培养学生的团队合作精神,设计了责任分工表和团队考核方式;为增强学生的创新意识,设置了阶段性交流和成果展示环节。研究结果表明,引导式教学使学生从被动式学习转变为主动式、探索式,极大地提高学生的学习热情和学习效率。 展开更多
关键词 引导式教学 基于项目案例 翻转课堂
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核准追诉若干疑难问题探讨——对最高人民检察院第六批指导性案例的评析
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作者 王登辉 《湖湘法学评论》 2024年第3期128-146,共19页
分析核准追诉问题的关键是正确解释“已过二十年追诉期限”,这涉及如何确定追诉时效终点等难题。在分析追诉时效终点时,需要运用类型化、标准化和系统思维,从现行法规范中提炼追诉时效的适用步骤、影响因素等。作为追诉时效终点的判断标... 分析核准追诉问题的关键是正确解释“已过二十年追诉期限”,这涉及如何确定追诉时效终点等难题。在分析追诉时效终点时,需要运用类型化、标准化和系统思维,从现行法规范中提炼追诉时效的适用步骤、影响因素等。作为追诉时效终点的判断标准,“二分法说”的解释力强于其他学说。“已过二十年追诉期限”宜限定于犯罪的追诉时效期限为20年,且追诉时效期限届满之日以后才刑事立案的情形(适用1997年刑法),或追诉时效期限届满之日以后才对犯罪人采取强制措施的情形(适用1979年刑法)。适用“不受追诉期限的限制”条款的,可以直接追诉,不符合报请核准追诉的条件。最高人民检察院第六批指导性案例只回答了“检察院办理核准追诉案件时考虑了哪些因素”的问题,未回答“追诉时效终点如何确定,适用步骤和影响因素是什么”“该案是否符合报请核准追诉的条件”等问题,未揭示几个重要时间节点对追诉时效的影响和作用机理,对追诉时效在共同犯罪中的适用存在认识误区,故有必要再次发布以核准追诉为主题的指导性案例。 展开更多
关键词 追诉时效 核准追诉 追诉时效终点 指导性案例
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滚动轴承保持架引导方式及典型案例 被引量:2
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作者 杨晓蔚 《轴承》 北大核心 2024年第1期1-8,共8页
对滚动轴承保持架引导方式及其适用工况作了概要介绍,凝练了保持架引导方式的一般选用准则,重点对高速轴承中保持架引导方式的关键控制要素进行了阐述,给出了保持架引导面失效的解决对策,列举了不同保持架引导方式以及不同线膨胀系数材... 对滚动轴承保持架引导方式及其适用工况作了概要介绍,凝练了保持架引导方式的一般选用准则,重点对高速轴承中保持架引导方式的关键控制要素进行了阐述,给出了保持架引导面失效的解决对策,列举了不同保持架引导方式以及不同线膨胀系数材料保持架引导间隙设计等典型案例,形成了有关保持架引导方式的系统化知识。 展开更多
关键词 滚动轴承 保持架 引导 案例
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最高人民法院指导性案例2023年度司法应用报告 被引量:1
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作者 郭叶 孙妹 《中国应用法学》 CSSCI 2024年第3期179-195,共17页
指导性案例的应用效果备受学术和审判实务界关注,2023年最高人民法院发布2批13例指导性案例,本文以最高人民法院已发布的39批224例指导性案例作为研究对象,“北大法宝—司法案例库”收录的裁判文书作为实证研究样本,从多个视角出发,对... 指导性案例的应用效果备受学术和审判实务界关注,2023年最高人民法院发布2批13例指导性案例,本文以最高人民法院已发布的39批224例指导性案例作为研究对象,“北大法宝—司法案例库”收录的裁判文书作为实证研究样本,从多个视角出发,对指导性案例发布和应用情况进行比较研究。对11286例应用案例进行实证分析,在整体和个案应用的研究基础上,详细分析案由专题、应用法院、应用主体和应用内容等要素。综述中通过数据展现指导性案例在实体和程序指引的不均衡、失效运行机制的规范以及赋予指导性案例刚性效力等方面的建议,呈现2023年度指导性案例在司法实践中的变化与发展。 展开更多
关键词 案例指导制度 指导性案例 司法应用 实证研究
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基于数字图像相关原理的埋头弹程序燃烧特性试验研究
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作者 师军飞 钱林方 +3 位作者 陈光宋 尹强 刘道坤 李仲刚 《兵工学报》 EI CAS CSCD 北大核心 2024年第4期1047-1059,共13页
为分析埋头弹的装药程序燃烧特性和上膛挤进运动特性,对埋头弹两级点火发射过程进行试验研究。设计并建立程序燃烧特性试验系统,采用高速摄像系统获得各组弹丸的运动图像序列。基于数字图像相关原理,对各组图像序列进行定性和定量分析,... 为分析埋头弹的装药程序燃烧特性和上膛挤进运动特性,对埋头弹两级点火发射过程进行试验研究。设计并建立程序燃烧特性试验系统,采用高速摄像系统获得各组弹丸的运动图像序列。基于数字图像相关原理,对各组图像序列进行定性和定量分析,对回收的弹带刻槽形貌分析测量,获得一级点火的弹丸运动特性,两级点火的程序燃烧特性以及弹带刻槽形貌特性。研究结果表明:速燃点火药的质量直接影响一级点火弹丸上膛性能,质量增加时弹丸上膛时间显著缩短,上膛速度大幅提高;可燃导向筒过早的破碎会导致上膛速度大幅增加,使弹带刻槽形貌非常恶劣,不能可靠密封弹后火药燃气和可靠导转弹丸运动,影响内弹道性能和弹丸的膛内运动姿态;需要对速燃点火药与可燃导向筒进行合理的匹配设计,保证可燃导向筒的破碎时机处于可控范围,从而实现理想的两级点火和程序燃烧设计目标。 展开更多
关键词 埋头弹 数字图像相关原理 两级点火 程序燃烧 可燃导向筒 上膛速度 弹带刻槽
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人工智能类案检索机制的发展与完善 被引量:1
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作者 曹奕阳 《科技与法律(中英文)》 CSSCI 2024年第2期127-138,共12页
在大数据时代,以人工智能技术服务于类案检索,有助于提升案件的查全率和查准率,促进类案类判。人工智能类案检索机制的发展经历了三个阶段,即萌芽期、试行期与发展期,逐步成为推动审判流程标准化的一种长效机制,促进法官作出正确裁判。... 在大数据时代,以人工智能技术服务于类案检索,有助于提升案件的查全率和查准率,促进类案类判。人工智能类案检索机制的发展经历了三个阶段,即萌芽期、试行期与发展期,逐步成为推动审判流程标准化的一种长效机制,促进法官作出正确裁判。但在目前司法实践中,存在着诸如检索缺乏刚性约束机制与激励机制,数据库案例总量偏低、种类过少、数据来源较单一,智能系统的案例标识技术尚欠专业等问题,影响着类案检索制度的实际运行效果。因此,人工智能类案检索机制还有待于进一步完善:应实现从问责为主到激励为先的转变,在赋予法官强制检索义务的同时,探索和建立科学合理的激励机制,鼓励法官在司法实践中积极开展类案检索工作;应建设统一完备的司法数据库,将具有典型性、指导性、权威性的指导性案例和参考案例收入司法数据库;应提升案例要素标识的精准度,凸现案件的要素特征,从而推进类案检索智能化、精准化。 展开更多
关键词 人工智能 指导性案例 类案检索 司法数据库
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个性化3D打印导板辅助重度脊柱后凸畸形手术矫正
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作者 彭元昊 成凯 +5 位作者 朱浩天 王虹 刘康 王宇宁 丁焕文 吴毅 《陆军军医大学学报》 CAS CSCD 北大核心 2024年第21期2443-2450,共8页
目的评估在个性化3D打印导板引导下,行经椎体内截骨术、脊柱内固定术治疗重度脊柱后凸手术的矫形率、椎弓根钉位准确性和治疗效果。方法本研究为单中心非随机性临床试验研究,样本涵盖2018年12月至2023年6月期间接受经椎体内截骨术的19... 目的评估在个性化3D打印导板引导下,行经椎体内截骨术、脊柱内固定术治疗重度脊柱后凸手术的矫形率、椎弓根钉位准确性和治疗效果。方法本研究为单中心非随机性临床试验研究,样本涵盖2018年12月至2023年6月期间接受经椎体内截骨术的19例患者(男性8例,女性11例)。其中7例患者为导板组,采用计算机辅助设计(CAD)技术进行术前手术规划和术中个性化3D打印导板引导,12例患者为传统组,采用传统置钉矫正。术后评估包括后凸Cobb角、脊柱矫正率、钉位准确性和Oswestry功能障碍指数问卷调查(Oswestry Dysfunction Index,ODI)。结果研究纳入患者19例,平均年龄48.0岁。平均随访26.4(9~54个月)。所有患者均获得相对满意的矫正效果,导板组平均矫正率为96.83%,传统组为86.61%。导板组与传统组平均术中出血量(857 vs 1045 mL)和平均手术时间(344 vs 402 min)差异无统计学意义,平均住院时间(11 vs 18 d)差异具有统计学意义(P<0.05)。本研究共置钉278枚,其中导板辅助置钉70枚,97.1%为A级或B级;传统组置钉208枚,其中93.8%为A级或B级。术后CT/X线检查显示导板组与传统组后凸畸形矫正均达到一定程度矫正,2组的平均矫正角度(43.37°vs 36.10°)差异无统计学意义;而导板组的矫正率显著高于传统组(96.83%vs 86.61%,P<0.01);ODI评分导板组显著低于传统组(P<0.05)。结论在脊柱截骨术中,利用计算机辅助技术进行术前规划、手术模拟和个性化3D打印导板的辅助,能够改善术后矫形率,提高置钉的准确性,改善严重脊柱后凸畸形患者的生活质量。 展开更多
关键词 脊柱后凸 导板 3D打印 计算机辅助设计 病例系列
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