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| 1 | 金属成形建模中的快速拟逆方法和塑性直接算法显示文摘逆方法 (IA)是一种基于产品最终形状的,应用于构建轴对称冷锻造过程模型的简单方法。由于是假设在简单路径下变形,而且简化了工具的作用形式,因此该方法计算速度很快;数值测试显示,该种方法因为没有考虑变形历史,因而只能较好的估算应变,但是应力估算的误差较大。该文提出了一种新方法——拟逆方法 (PIA:Pseudo Inverse Approach),这种方法是在保留IA优势的基础上,考虑了工件的加载历史,因而可以较好的估算应力。PIA引入了多个中间构型来考虑变形路径,摒弃了传统的接触问题的处理方法,采用自由表面法对中间构型进行修正。另外,基于等效应力的概念和拉伸应力应变曲线,提出了一种全新的塑性积分的直接算法,并编写了快速健强的计算程序。通过和ABAQUS的计算结果的比较,研究了PIA的计算效率和局限性,结果表明,该方法可以应用于初始预成形的设计以及锻造工艺的参数优化。 | Ali Halouani Boussad Abbès | 2011 | 塑性工程学报2011，18，6： | 1 |
| 2 | 基于伪逆算法的冷镦坯模具的优化(英文)显示文摘基于对最终产品形状的认识,提出一种新的快速的针对多工步轴对称冷锻建模方法—'伪逆法(PIA)'。为了考虑变形路径,引入了一些中间构型并且采用自由表面对这些中间构形进行修正而不采用接触算法。利用等效应力的概念和拉伸曲线,提出了一种新的快速而健壮的塑性积分直接算法。数值试验表明:与增量法相比,伪逆法速度非常快。PIA被用于多工步冷锻工艺预制体模具优化设计过程中,该优化过程以最大限度减少在锻造过程中产生的等效塑性应变和需要的冲压力为目标,预制体模具的形状采用B样条曲线描述,以B样条曲线控制点的纵坐标为设计变量。目标函数的演变表明了模具形状优化对锻造件的质量和节能的重要性。通过与传统增量法的结果相比较,体现出了PIA的高效性和准确性。 | Ali HALOUANI Yu-ming LI ABBES Boussad Ying-qiao GUO | 2012 | 中国有色金属学会会刊:英文版2012，22，S2： | 0 |
| 3 | Complicated sinusitis in children:18 cases report显示文摘AIM: To precise the clinical characteristics of rhinosinusitis in pediatric population, their complications and therapeutic approaches.METHODS: All infants younger than 15 years adm-itted to the Ear, Nose and Throat Department of the Military Hospital of Tunis, Tunisia for a complicated rhinosinusitis between 2006 and 2013 were evaluated. Data related to patients and the disease were collected and analyzed: past medical history, complaints, clinical examination, radiologic findings, therapeutic management and evolution. RESULTS: Eighteen cases were identified with a mean age of 5.1 years(5 mo to 13 years)(SD ± 3.1). A male preponderance was noted in 72% of the cases. Rhinorrhea and fever were the most common presenting symptoms. Radiological explorations(computed tomography-scan ± magnetic resonance imaging) have been practiced for all of our patients. Orbital involvement was found in 77% of the cases associated with meningitis in 2 cases. Antibiotherapy was prescribed to all our patients. Surgical procedures were performed in 8 cases: endoscopic sinus surgery and/or external drainage of orbital abscess. After an average follow-up period of 2.5 years, 3 of our patients were lost. The ophthalmic sequelae noted in 3 cases(16%) were permanent and caused important functional and social problems. A favourable outcome has been noted in the rest of our patients. CONCLUSION: Rhinosinusitis can be extremely severe in children requiring urgent radiological imaging and aggressive treatment to avoid orbital and intracranial complications. | Ali Mardassi Nabil Mathlouthi Hajer Mbarek Chiraz Halouani Sameh Mezri Cyrine Zgolli Ghassen Chebbi Rania Ben Mhamed Khemaies Akkari Sonia Benzarti | 2015 | World Journal of Otorhinolaryngology2015，5，1： | 0 |
| 4 | Nasopharyngeal carcinoma: Long term follow-up of 83 patients显示文摘AIM: To analyzes the clinical, paraclinical, therapeutical and evolutive features of nasopharyngeal carcinoma(NPC).METHODS: All the patients treated for a nasopharyngeal carcinoma between 2000 and 2013 in the Ear-NoseThroat Department of the Military Hospital of Tunis, Tunisia were collected in this study. Eighty-three patients signed a written consent prior to study enrollment. The gender ratio(M/W) was 6.5 with a median age of 49 years(range 16-85). The median follow up time was 37 mo(18 to 108 mo). The evolution, during and after the end of therapy, was assessed on clinical biological and radiological exams. Different parameters were analyzed and compared to other series: complications of chemo and radiotherapy, recurrence of the disease, metastasis and overall survival rate.RESULTS: Of the 83 patients of our study, 15% had T1 tumors, 20% had T2, 23% had T3 and 41% had T4 disease. At the time of diagnosis, 14% of the patients had a cranial nerve deficit. Only 12 patients had exclusive radiotherapy and the remaining of our patients had concomitant radio chemotherapy. Iatrogenic complications were diagnosed in 53% of the cases: radioepithelitis(28%), radiodermatitis(9%), xerostomia(17%), osteoradionecrosis(3%), cerebral radionecrosis(1%) and a pancytopenia(17%). The follow-up period varied from 18 to 108 mo(average: 37 mo). During the first six months after treatment, a persistence of the disease was found in 11% of patients, while a recurrence of the cancer was diagnosed in 6% and distant metastasis developed in 14% of the patients. Fifteen patients needed remedial chemotherapy for a relapse or metastasis and five had palliative chemotherapy for very advanced cases. We report 3 cases of death during the follow-up. CONCLUSION: Despite its excellent radio-chemotherapy response, and general good prognosis, a careful follow-up of patients with NPC is necessary to detect and manage any iatrogenic complication, locoregional recurrence or metastasis of the disease. | Ali Mardassi Nabil Mathlouthi Nawel Hlila Chiraz Halouani Sameh Mezri Cyrine Zgolli Ghassen Chebbi Rania Ben Mhamed Khemaies Akkari Sonia Benzarti | 2015 | World Journal of Otorhinolaryngology2015，5，2： | 0 |
| 5 | Synchronous carcinoma of head and neck: 2 cases report显示文摘Multiple primary cancers are becoming an increasingly frequent situation and are often the source of many diagnostic and therapeutic difficulties. We report the case of two patients diagnosed with head and neck synchronous carcinomas. The first case is a 33-yearold man with a history of a keratinizing squamous cell carcinoma of the eye lid and who was operated 4 mo later from a mucoepidermoid carcinoma of thesubmandibular salivary gland. The second case is a 71-year-old woman who underwent a total parotidectomy for a mucoepidermod carcinoma of the left parotid gland and who consulted 2 mo later for epistaxis. The explorations concluded to a squamous cell carcinoma of the nasopharynx. The patient had a complementary radiotherapy. No local neither distant recurrence of the two tumors has been detected after a follow-up of 36 mo in the first case and 24 mo in the second one. | Ali Mardassi Nabil Mathlouthi Nawel Hlila Chiraz Halouani Sameh Mezri Cyrine Zgolli Ghassen Chebbi Rania Ben Mhamed Khemaies Akkari Sonia Benzarti | 2015 | World Journal of Otorhinolaryngology2015，5，2： | 0 |
| 6 | Infrathyroidian hydatid cyst: Diagnostic difficulties and therapeutic management, a case report显示文摘Hydatidosis is a cosmopolitan anthropozoonose common to humans and many mammals. The cervical localization is rare even in endemic countries. We report a case of cervical hydatidosis located in the infra-thyroidian region. The diagnosis was suspected on clinical and radiological examinations(Ultrasonography, computed tomography-scan). The surgical removal of the cyst was difficult because of the inflammatory tissue around the mass. The confirmation of the diagnosis was obtained by the histopathological examination. During the followup, a local recurrence of the disease was diagnosed after 9 mo treated successfully by surgery. | Ali Mardassi Nabil Mathlouthi Hajer Mbarek Chiraz Halouani Sameh Mezri Cyrine Zgolli Ghassen Chebbi Rania Ben Mhamed Khemaies Akkari Sonia Benzarti | 2015 | World Journal of Otorhinolaryngology2015，5，2： | 0 |
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