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Samarium Diiodide-Induced Reductive Cleavage of Se-St Bond in Arylselenotrimethylsilane Leading to the Formation of Samarium Arylselenolate: Synthesis of β-Arylseleno Estsrs and β-Arylseleno Nitriles

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Chinese Chemical Letters 1998年第10期9卷 885-887页

作者： Song Lin ZHANG and Yong Min ZHANG(department of Chemistry, hangzhou university, hangzhou, 310028) department of Chemistry Hangzhou University Hangzhou 310028 China

The Se-St bond in arylselenotrimethylsilane was reduced by samarium diiodide to produce samarium arylselenolate, which reacted with a,β-unsaturated esters or α,β-unsaturated nitriles to give β-selenoesters and β-... 详细信息

关键词： samarium diiodide arylselenotrimethylsilane arylseleno esters arylseleno nitriles

Quality of life in patients with liver cancer after operation:a 2-year follow-up study

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Hepatobiliary & Pancreatic Diseases International 2004年第4期3卷 530-533页

作者： Li Chen, Yong Liu, Guo-Gang Li, si-Feng Tao, Yuan Xu and Hua Tian hangzhou, china : department of Surgery, Second Affiliated Hospital, Zhejiang university School of Medicine, hangzhou 310009 , china department of Surgery Second Affiliated Hospital Zhejiang University School of Medicine Hangzhou 310009 China. chenli@***

BACKGROUND:Quality of life (QL) is a concept which reflects the physical, social, and emotional attitudes and behaviours of an individual. QL assessment is becoming in- creasingly recognised as an outcome and predictor for can- cer patients. Although hepatectomy has been widely ac- cepted as treatment of choice to offer a chance of cure for patients with liver cancer, little is known about the subjec- tive clinical results after this operation. This prospective study was designed to evaluate the Pre- and postoperative quality of life in patients with liver cancer. METHODS: The quality of life of 36 consecutive patients was measured using gastrointestinal quality of life index (GQLI) regularly 2 years after the operation, starting with a preoperative measurement. RESULTS: The score of mean preoperative GQLI was 106 ± 13 points, and it was reduced significantly 2-10 weeks after the operation (86-98) (P 0. 05 ). In the patients who survived more than 9 months, the GQLI score was higher than that before the operation. Major hepatectomy (lobectomy and combined segmentectomy) reduced the GQLI score more evidently than did minor hepatectomy (simple segmentec- tomy ) in 2-5 weeks after the operation (P siONS: The assessment of the quality of life is meaningful for patients with liver cancer. Tumor recur- rence, poor liver function and major operation are the most important factors for reducing the quality of life. He- patic resection is justified by its effects on the survival and the quality of life of the patients.

关键词： quality of life liver cancer operation

Orthopedic revolution:The emerging role of nanotechnology

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World Journal of Orthopedics 2024年第10期15卷 932-938页

作者： Wen-Jie Ruan si-si Xu Dong-Hui Xu Zhi-Peng Li department of Sports Medicine Zhejiang Provincial People's Hospital(The Affiliated People's Hospital)Hangzhou 310000Zhejiang ProvinceChina School of Medicine Taizhou UniversityTaizhou 318000Zhejiang ProvinceChina The Second department of Orthopedics The Fifth Affiliated Hospital of Zhengzhou UniversityZhengzhou 450015Henan ProvinceChina

This review summarizes the latest progress in orthopedic nanotechnology,ex-plores innovative applications of nanofibers in tendon repair,and evaluates the potential of selenium and cerium oxide nanoparticles in osteoarthritis and osteo-blast *** review also describes the emerging applications of inje-ctable hydrogels in cartilage engineering,emphasizing the critical role of inter-disciplinary research and highlighting the challenges and future prospects of in-tegrating nanotechnology into orthopedic clinical *** comprehensive approach provides a holistic perspective on the transformative impact of nanote-chnology in orthopedics,offering valuable insights for future research and clinical applications.

关键词： Cerium oxide nanoparticles Injectable hydrogels Interdisciplinary research Orthopedic nanotechnology Selenium nanoparticles

Noise‐tolerant matched filter scheme supplemented with neural dynamics algorithm for sea island extraction

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CAAI Transactions on Intelligence Technology 2024年第4期9卷 996-1013页

作者： Yiyu Chen Dongyang Fu Difeng Wang Haoen Huang Yang si Shangfeng Du School of Electronics and Information Engineering Guangdong Ocean UniversityZhanjiangChina State Key Laboratory of Satellite Ocean Environment Dynamics Second Institute of OceanographyMinistry of Natural ResourcesHangzhouChina School of Artificial Intelligence and Automation Huazhong University of Science and TechnologyWuhanChina

Achieving high‐precision extraction of sea islands from high‐resolution satellite remote sensing images is crucial for effective resource development and sustainable ***,achieving such accuracy for sea island extraction presents significant challenges due to the presence of extensive background interference.A more widely applicable noise‐tolerant matched filter(NTMF)scheme is proposed for sea island extraction based on the MF *** NTMF scheme effectively suppresses the background interference,leading to more accurate and robust sea island *** further enhance the accuracy and robustness of the NTMF scheme,a neural dynamics algorithm is supplemented that adds an error integration feedback term to counter noise interference during internal computer operations in practical *** comparative experiments were conducted on various remote sensing images of sea islands under different noisy working conditions to demonstrate the superiority of the proposed neural dynamics algorithm‐assisted NTMF *** experiments confirm the ad-vantages of using the NTMF scheme for sea island extraction with the assistance of neural dynamics algorithm.

关键词： edge detection image classification image recognition shape extraction

Stabilization of Nonhomogeneous Euler-Bernoulli Beam with Local Kelvin-Voigt Damping

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Stabilization of Nonhomogeneous Euler-Bernoulli Beam with Lo...

Effects of Al(i-Bu)_3 on Propylene Polymerization and Copolymerization by rac-Me_2si(Ind)_2ZrCl_2/MAO

1998年中国控制会议

作者： Chen Shuping si Shoukui department of Applied mathematics, Zhejiang university, hangzhou, 310027, china.

In this paper, we prove that the energy of the nonhomogeneous EulerBernoulli beam decays uniformly exponentially when the KelvinVoigt damping is distributed locally on any subinterval of the region. The frequency doma... 详细信息

关键词： Euler-Bernoulli beam equation local Kelvin-Voigt damping multiplier exponential stability.

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Chinese Chemical Letters 1998年第1期9卷 83-85页

作者： Zhi Qiang FAN Yong Hui ZHANG Qi WANG Lin Xian FENG (department of Polymer Science and Engineering, Zhejiang university, hangzhou 310027) Zhejiang Univ Dept Polymer Sci & Engn Hangzhou 310027 Peoples R China

The effects of adding Al(i-C_4H_9)_3 (TBA) to rac-Me2si(Ind)2ZrCl2/ MAO catalyzed propylene-1-octene copolymerization were studied. At TBA /MAO (Al/AI mole ratio) of about 0.6, the polymerization activity was found to be much higher than the system without TBA. Increases of polymer molecular weight and 1-octene content from addition of TBA were also observed.

关键词： propylene-1-octene polymerization metallocene catalyst

Delivery room resuscitation intensity and associated neonatal outcomes of 24^(+0)-31^(+6) weeks'preterm infants in china:a retrospective cross-sectional study

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World Journal of Pediatrics 2024年第1期20卷 64-72页

作者： si-Lu Wang Chun Chen Xin-Yue Gu Zhao-Qing Yin Le Su si-Yuan Jiang Yun Cao Li-Zhong Du Jian-Hua Sun Jiang-Qin Liu Chuan-Zhong Yang department of Neonatology Shanghai Key Laboratory of Maternal Fetal MedicineShanghai Institute of Maternal-Fetal Medicine and Gynecologic OncologyShanghai First Maternity and Infant HospitalSchool of MedicineTongji UniversityNo.2699Gaoke Western RoadPudong DistrictShanghai 201204China department of Neonatology Affiliated Shenzhen Maternity and Child Healthcare HospitalSouthern Medical UniversityNo.2004Hongli RoadFutian DistrictShenzhen 518028China NHC Key Laboratory of Neonatal Diseases Fudan UniversityChildren's Hospital of Fudan UniversityShanghaiChina department of Neonatology People's Hospital of DehongKunming Medical UniversityDehongChina department of Neonatology Children's Hospital of Fudan UniversityShanghaiChina department of Neonatology Children's HospitalZhejiang University School of MedicineHangzhouChina department of Neonatology Shanghai Children's Medical CenterSchool of MedicineShanghai Jiao Tong UniversityShanghaiChina

Background The aim of this study was to review current delivery room(DR)resuscitation intensity in Chinese tertiary neonatal intensive care units and to investigate the association between DR resuscitation intensity and short-term outcomes in preterm infants born at 24+0_31+6 weeks gestation age(GA).Methods This was a retrospective cross-sectional *** source population was infants born at 24+0_31+6 weeks'GA who were enrolled in the Chinese Neonatal Network 2019 *** infants were categorized into five groups:(1)regular care;(2)oxygen supplementation and/or continuous positive airway pressure(O2/CPAP);(3)mask ventilation;(4)endotracheal intubation;and(5)cardiopulmonary resuscitation(CPR).The association between DR resuscitation and shortterm outcomes was evaluated by inverse propensity score-weighted logistic *** Of 7939 infants included in this cohort,2419(30.5%)received regular care,1994(25.1%)received O,/CPAP,1436(18.1%)received mask ventilation,1769(22.3%)received endotracheal intubation,and 321(4.0%)received CPR in the *** maternal age and maternal hypertension correlated with a higher need for resuscitation,and antenatal steroid use tended to be associated with a lower need for resuscitation(Psignificantly with increasing amounts of resuscitation in DR after adjusting for perinatal *** strategies vary widely between centers,with over 50%of preterm infants in eight centers requiring higher intensity *** Increased intensity of DR interventions was associated with increased mortality and morbidities in very preterm infants in *** is wide variation in resuscitative approaches across delivery centers,and ongoing quality improvement to standardize resuscitation practices is needed.

关键词： Cardiopulmonary resuscitation Delivery room Endotracheal intubation Neonatal resuscitation Preterm

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基于视频案例下初中数学课堂学生参与度分析

数学教育学报 2011年第4期20卷 10-12页

作者：斯海霞叶立军杭州师范大学理学院

学生是知识建构的主体，其课堂行为既能反映学生参与学习、知识建构的程度，同时也能体现教师教学的特点．课堂视频可以有效记录学生课堂参与的过程，是课堂教学研究的新途径．对初中数学课堂视频分析，发现初中生课堂参与行为有以下特... 详细信息

学生是知识建构的主体，其课堂行为既能反映学生参与学习、知识建构的程度，同时也能体现教师教学的特点．课堂视频可以有效记录学生课堂参与的过程，是课堂教学研究的新途径．对初中数学课堂视频分析，发现初中生课堂参与行为有以下特点：学生应答行为发生最频繁；学生集体回答次数远多于学生独立应答次数；学生应答和课堂练习所占时间最长；在课堂练习阶段，学生的参与行为出现的次数最多；学生在课堂上极少提问．

关键词：学生参与数学课堂视频案例

The lower and upper bounds of the degree distribution of a graded algebra

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Science china mathematics 2013年第5期56卷 983-994页

作者： si junru department of mathematics Hangzhou Dianzi University

For a graded algebra,the minimal projective resolution often reveals amounts of *** generated degrees of modules in the minimal resolution of the trivial module form a sequence,which can be called the degree distribution of the *** try to find lower and upper bounds of the degree distribution,introduce the notion of(s,t)-(homogeneous) determined algebras and construct such algebras with the aid of algebras with pure *** some cases,the Ext-algebra of an(s,t)-(homogeneous) determined algebra is finitely generated.

关键词： d-Koszul algebra spectral sequence regular normal extension