Results 81 to 90 of about 1,069,700 (123)

中国科学院力学研究所流固耦合系统力学重点实验室;

, 2014
泥沙输运是河口海岸工程中的重要问题,波浪掀沙对近岸泥沙输运的影响非常关键。自然界情况下,水波是不规则波的,不仅有峰谷值的不对称,还有一定的前倾度,特别是在近岸区域,波浪非线性很强,且一般处于高雷诺数条件下。因此,研究高雷诺数下非对称前倾波(如图1所示)的掀沙十分必要。本文采用大涡模拟方法,模拟了高雷诺数下非对称前倾波的流场,获得了底部切应力的变化过程,由此确定Shield数,并进一步得到输沙率,从而分析非对称前倾波的输沙规律。首先,根据Watanabe&Sato(2004)的实验数据 ...
周济福, 李银军
core  

[Expert consensus on the clinical diagnosis and treatment of coagulation disorders related to liver disease]. [PDF]

Zhonghua Gan Zang Bing Za Zhi
National Clinical Research Center for Infectious Diseases, Society of Hepatology, Beijing Medical Association, Translational Medicine Branch, Chinese Association of Gerontology and Geriatrics.   +4 more
europepmc   +1 more source

[Deep learning models based on fused ultrasound images for the assessment of cystocele in women]. [PDF]

Zhong Nan Da Xue Xue Bao Yi Xue Ban
Ran S, Lu R, Li M, Qu C.
europepmc   +1 more source

[Research progress of microfluidic technology in competitive sports]. [PDF]

Sheng Wu Yi Xue Gong Cheng Xue Za Zhi
Hu C, Zhang C, Fan Z, Deng X, Liu M.
europepmc   +1 more source

涡旋均流器对高浓度泥浆管道输送的减阻机制及其效能

Haiyang gongcheng zhuangbei yu jishu
针对泥浆管道输送中的减阻难题，提出了一种新型减阻装置（均流器），并通过数值模拟系统分析了转速-流速比（k）、颗粒浓度（Cv）和导流叶片高度-管径比（H/D）等关键参数对其减阻性能的影响。研究表明，该均流器通过其导流叶片的旋转产生强力涡旋，将管道内原不对称流速剖面转化为对称的椭圆曲线剖面，利于管底沉积泥沙的起扬，提升管道输送减阻效果；涡旋均流器的构型参数（H/D）和运行参数（k）是影响其减阻效果的关键因素，减阻率随H/D和k的增大均呈先增后减的趋势，H/D=0.15时均流器的减阻效果最好 ...
王彤, 沈高扬, 喻国良
doaj  

[Efficacy and safety of oral melphalan as conditioning regimen for autologous hematopoietic stem cell transplantation in multiple myeloma]. [PDF]

Zhonghua Xue Ye Xue Za Zhi
Wang J, Gong L, Pan MM, Jin SW, Mi JQ, Zhang WP, Xu J.   +6 more
europepmc   +1 more source

多种复合指纹法示踪高寒区流域风水作用产沙来源

Shuitu Baochi Xuebao
目的为运用多种复合指纹法精准示踪高寒区河流、水库等水利设施在风、水复合侵蚀环境下的泥沙来源。方法在黄河龙羊峡水库支流沙沟河流域，采集风沙和水沙泥沙来源区的土壤样本，以及流域出口的新鲜泥沙样本。利用X射线荧光光谱仪测试40种元素指纹因子，采用多组指纹因子法、机器学习最佳复合指纹法、Walling⋅C最佳复合指纹法3种指纹法解析泥沙来源。结果在指纹因子筛选方面，CT-KW-DFA指纹因子筛选方法的DFA累计判别率为82.40%，CT-RF-DFA指纹因子筛选方法DFA累计判别率为100%，CT-RF ...
穆开放, 方海燕, 陈琼, 周强, 柳本立, 牛百成   +5 more
doaj  

[Safety of blinatumomab combined with dasatinib in the treatment of pediatric Philadelphia chromosome-positive acute lymphoblastic leukemia]. [PDF]

Zhongguo Dang Dai Er Ke Za Zhi
Zheng FY, Ding MM, Lu AD, Jia YP, Zeng HM, Zhang LP.   +5 more
europepmc   +1 more source

[Diagnostic agreement of large language models with clinical reference diagnoses of mental disorders and associated factors]. [PDF]

Zhong Nan Da Xue Xue Bao Yi Xue Ban
Xu S, Lin Z, Wang H, Yuan N, Chen C, Liu C.   +5 more
europepmc   +1 more source

[Effects of exergame combined with elastic band resistance training on exercise self-efficacy and physical activity levels in older adults with cognitive frailty: A mixed-methods study]. [PDF]

Zhong Nan Da Xue Xue Bao Yi Xue Ban
Ning H, Chen Q, Chen X, Wu S, Zhang X, Li M, Feng H, Yu R.   +7 more
europepmc   +1 more source