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基于sigmoid函数的PMSM模糊滑模观测器设计

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制造业自动化 2015年第10期37卷 154-156页

作者：牛绿原余剑王刚李宇南京理工大学泰州科技学院泰州225300

针对近年来被广泛应用于工业控制领域的永磁同步电机无速度传感器控制进行研究,设计出新型滑模电流观测器。为了减小抖振,以sigmoid函数代替切换函数,引入模糊控制器以实现滑模增益的自适应更新,并对观测器的稳定性进行了证明。最后,利... 详细信息

针对近年来被广泛应用于工业控制领域的永磁同步电机无速度传感器控制进行研究,设计出新型滑模电流观测器。为了减小抖振,以sigmoid函数代替切换函数,引入模糊控制器以实现滑模增益的自适应更新,并对观测器的稳定性进行了证明。最后,利用MATLAB/Simulink软件搭建了仿真模型,通过仿真实验证实了其正确性和可行性。

关键词：永磁同步电机滑模观测器 sigmoid 模糊自适应

Preoperative rectosigmoid endoscopic ultrasonography predicts the need for bowel resection in endometriosis

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World Journal of Gastroenterology 2019年第6期25卷 696-706页

作者： Victor Desplats René-Louis Vitte Joseph du Cheyron Gilles Roseau Arnaud Fauconnier Frédérick Moryoussef Department of Hepato-gastroenterology Centre Hospitalier Intercommunal Poissy Saint Germain Department of Statistics Centre Hospitalier Intercommunal Poissy Saint Germain Department of Gastroenterology H?pital Cochin Department of Obstetrics and Gynecology Centre Hospitalier Intercommunal Poissy Saint Germain University of Saint Quentin en Yvelines

BACKGROUND Rectosigmoid endometriosis is an underdiagnosed disease responsible for abdominal pain, transit disorders and rectal bleeding. Two surgical approaches,rectosigmoid bowel resection(segmental or patch) or intramuscular layer dissection(shaving), are *** To assess whether the lesion features observed via preoperative rectosigmoid endoscopic ultrasonography(RS-EUS) might predict the need for bowel *** This multicentric retrospective study was conducted on patients with rectosigmoid endometriosis who underwent a curative surgical procedure,evaluated by RS-EUS performed by two trained operators, between January 2012 and March 2018. A univariate statistical analysis was performed on nodules' RSEUS features(thickness, width, infiltration of the submucosae, presence of a bump into the digestive lumen and presence of multiple rectosigmoid localizations). A multivariate logistic regression was then performed on the significant *** Of the 367 patients, 73 patients with rectosigmoid endometriosis were evaluated by RS-EUS and underwent rectosigmoid surgery. After the univariate analysis was completed, thickness, width and infiltration of the submucosae were identified as potential predictive factors for bowel resection. In a multivariate logistic regression model, only thickness appeared to be a significant [odds ratio(OR) = 1.49, 95% confidence interval(CI): 1.04-2.12, P = 0.028] predictive factor for bowel resection. Receiver operating characteristic analysis performed showed that a thickness over 5.20 mm might be used as cut-off with a sensitivity of 76%, a specificity of 81%, and an area under carve = 0.82. The cut-off values for 100%sensitivity and 100% specificity were 0.90 mm and 10.00 mm, respectively. A trend concerning width to predict the need for resection was also observed(OR1.12, 95%CI: 1.00-1.26, P = 0.054)CONCLUSION The presence of a rectosigmoid nodule of endometriosis greater than 5.20 mm thick on RS-EUS might predi

关键词： Endometriosis Surgery Endoscopy Ultrasound Bowel disease Rectum and sigmoid

A Series Piezoelectric Quartz Crystal Response Kinetics for *** Growth in the Presence of Cu(Ⅱ)

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Journal of Central South University 2000年第1期12卷 15-19页

作者： CHAI Li yuan 1,2 ,WEI Wan zhi 2,YAO Shou zhuo 2(1. Department of Metallurgical Science and Engineering, Central South University of Technology, Changsha 410083, China 2. College of Chemistry and Chemical Engineering, Hunan University, Changsha 1. Department of Metallurgical Science and Engineering Central South University of Technology 410083 Changsha China 2. College of Chemistry and Chemical Engineering Hunan University 410082 Changsha China

The kinetics on the growth of *** in the presence of Cu(Ⅱ) was studied using of series piezoelectric quartz crystal (SPQC). Arsenic ion inhibits the growth of *** , which is consistent with the previous results by other measuring methods. This further demonstrates that the SPQC can monitor the chemical activity of *** growth. Cupric ion accelerates the growth of *** . The mechanism was discussed, i. e., copper promotes the protein enzyme of *** , rusticyanin, to form over the range of cupric ion concentration studied. The reaction order of cupric ion in accelerating the bacterial growth is 0.067. The growth of *** is dependent on temperature, the apparent reaction activation energy decreases from 25.56 kJ/mol to 18.32 kJ/mol because of the addition of 10 mg/L Cu(Ⅱ) to the bacterial growth solution of pH 2.0 at initial inoculum of 10%.

关键词： series piezoelectric quartz crystal T.ferrooxidans growth kinetics sigmoid curve cupric ion

Giant colonic diverticulum,clinical presentation,diagnosis and treatment: Systematic review of 166 cases

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World Journal of Gastroenterology 2015年第1期21卷 360-368页

作者： Giuseppe Nigri Niccolò Petrucciani Giulia Giannini Paolo Aurello Paolo Magistri Marcello Gasparrini Giovanni Ramacciato Department of Surgery Sapienza Università di RomaSt.Andrea Hospital00189 RomeItaly

AIM: To investigate the clinical presentation,diagnosis,and treatment of giant colonic diverticulum(GCD,by means of a complete and updated literature review).GCD is a rare manifestation of diverticular disease of the *** than 200 studies on GCD were published in the literature,predominantly case reports or small patient ***: A systematic review of the literature was performed using the Embase and PubM ed databases toidentify all the GCD *** following MESH search headings were used: "giant colonic diverticulum"; "giant sigmoid diverticulum".The "related articles" function was used to broaden the search,and all of the abstracts,studies,and citations were reviewed by two *** following outcomes were of interest: the disease and patient characteristics,study design,indications for surgery,type of operation,and postoperative ***,a subgroup analysis of cases treated in the last 5 years was performed to show the current trends in the treatment of GCD.A GCD case in an elderly patient treated in our department by a sigmoidectomy with primary anastomosis and a diverting ileostomy is presented as a typical example of the ***: In total,166 GCD cases in 138 studies were identified in the *** most common clinical presentation was abdominal pain,which occurred in 69% of the *** the physical signs,an abdominal mass was detected in 48% of the cases,whereas 20% of the patients presented with fever and 14% with abdominal *** is based predominantly on abdominal computed *** most frequent treatment was colic resection with en-bloc resection of the diverticulum,performed in 57.2% of cases,whereas Hartmann's procedure was followed in 11.4% of the cases and a diverticulectomy in 10.2%.An analysis of sixteen cases reported in the last 5 years showed that the majority of patients were treated with sigmoidectomy and en-bloc resection of the diverticulum; the postoperative mortality wa

关键词： Colonic Diverticulum sigmoid Surgery Giant

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一种变尺度S型核分式低次幂自适应滤波算法

物理学报 2021年第15期70卷 311-318页

作者：火元莲王丹凤龙小强连培君齐永锋西北师范大学物理与电子工程学院兰州730000 西北师范大学计算机科学与工程学院兰州730000

为了进一步提高非线性自适应滤波算法在非高斯冲激噪声以及有色噪声环境下的鲁棒性,提出了一种基于S型函数的变尺度核分式低次幂自适应滤波算法,该算法利用S型函数的非线性饱和特性和低阶范数准则来克服训练数据被非高斯冲激噪声破坏时... 详细信息

为了进一步提高非线性自适应滤波算法在非高斯冲激噪声以及有色噪声环境下的鲁棒性,提出了一种基于S型函数的变尺度核分式低次幂自适应滤波算法,该算法利用S型函数的非线性饱和特性和低阶范数准则来克服训练数据被非高斯冲激噪声破坏时性能下降的问题,并将S型函数与核分式低次幂算法的代价函数相结合后,通过引入的变尺度因子来平衡和进一步提高算法的收敛速度与稳态误差性能.仿真结果表明在不同噪声环境的系统识别中,所提算法相比其他核自适应滤波算法的性能更优.

关键词：核自适应滤波算法变尺度因子低阶范数准则 sigmoid 函数

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一种离散鲸鱼算法及其应用

电子科技大学学报 2020年第4期49卷 622-630页

作者：张强郭玉洁王颖刘馨东北石油大学计算机与信息技术学院黑龙江大庆163318

针对鲸鱼优化算法(WOA)在求解高维复杂问题时存在收敛精度低,难以解决离散优化问题等的不足,提出了一种离散鲸鱼算法(DWOA)。该算法引入收敛因子调控个体距离最优鲸鱼位置的远近程度,利用惯性权值平衡算法的全局搜索和局部开发能力,通... 详细信息

针对鲸鱼优化算法(WOA)在求解高维复杂问题时存在收敛精度低,难以解决离散优化问题等的不足,提出了一种离散鲸鱼算法(DWOA)。该算法引入收敛因子调控个体距离最优鲸鱼位置的远近程度,利用惯性权值平衡算法的全局搜索和局部开发能力,通过改进的sigmoid函数对WOA进行离散化处理。9个基准函数和油田措施规划方案的测试结果表明,DWOA在收敛速度和寻优精度等方面均有较大的提升。

关键词：自适应惯性权值收敛因子离散鲸鱼算法油田措施规划 sigmoid

Diagnostic and therapeutic applications of water-immersion colonoscopy

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World Journal of Gastroenterology 2015年第21期21卷 6451-6459页

作者： Shinya Sugimoto Takeshi Mizukami Division of Gastroenterology and Hepatology Department of Internal MedicineKeio University School of Medicine Endoscopy Center NHO Kurihama Medical and Addiction Center

Colonoscopy techniques combining or replacing air insufflation with water infusion are becoming *** were originally designed to reduce colonic spasms,facilitate cecal intubation,and lower patient discomfort and the need for *** maneuvers straighten the rectosigmoid colon and enable the colonoscope to be inserted deeply without causing looping of the ***-immersion colonoscopy minimizes colonic distension and improves visibility by introducing a small amount of *** addition,since pain during colonoscopy indicates risk of bowel perforation and sedation masks this important warning,this method has the potential to be the favored insertion technique because it promotes patient safety without ***,this water-immersion method has not only been used for colonoscope insertion,but has also been applied to therapy for sigmoid volvulus,removal of lesions,lower gastrointestinal bleeding,and therapeutic diagnosis of abnormal bowel morphology and irritable bowel *** a larger sample size and prospective head-to-head-designed studies will be needed,this review focuses on the usefulness of waterimmersion colonoscopy for diagnostic and therapeutic applications.

关键词： Colonoscopy Water immersion Waterexchange Underwater Unsedated sigmoid volvulus Detorsion Polypectomy Gastrointestinal bleeding Irritable bowel syndrome

Topographical anatomy of asterion by an innovative technique using transillumination and skiagram

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Chinese Medical Journal 2007年第19期120卷 1724-1726页

作者： SRIJIT Das RAJESH Suri VIJAY Kapur Department of Anatomy Universiti Kebangsaan Malaysia50300 Kuala LumpurMalaysia Department of Anatomy Vardhman Mahavir Medical CollegeNew DelhiIndia Department of Anatomy Maulana Azad Medical CollegeNew DelhiIndia

The asterion is the point viewed in the norma lateralis of the skull, where the parietomastoid, occipito-mastoid and the lambdoid sutures meet. In the infants, it is the site of the posterolateral or mastoid fontanelle, which closes by the second year. Interestingly, the name ＂asterion＂ is derived from Latin and it stands for ＂edible root＂, or ＂starry＂. The asterion was a river God of Argos, in the Peloponnesos, southern Greece. The standard textbooks do not emphasize much on the asterion. As per standard textbooks, the parietomastoid and the occipitomastoid sutures meet the lateral end of the lambdoid suture at the asterion.

关键词： asterion posterior fontanelle skull sigmoid sinus

Surgical repair of intractable chylous ascites following laparoscopic anterior resection

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World Journal of Gastroenterology 2015年第19期21卷 6077-6081页

作者： Gi Won Ha Min Ro Lee Research Institute of Clinical Medicine Chonbuk National University Medical School

Chylous ascites is the accumulation of a milk-like peritoneal fluid rich in triglycerides and it is an unusual complication following surgical treatment of colorectal cancer. Conservative management is usually sufficientin patients with chylous ascites after surgery. However,we describe a patient with intractable chylous ascites after laparoscopic anterior resection for sigmoid colon cancer who failed initial conservative treatment. This patient was successfully managed by surgery.

关键词： sigmoid colon cancer Laparoscopy Anteriorresection Chylous ascites Surgical repair