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Real-time monitoring of brake shoe keys in freight cars
Rong ZOU,Zhen-ying XU,Jin-yang LI,Fu-qiang ZHOU
《信息与电子工程前沿(英文)》 2015年 第16卷 第3期 页码 191-204 doi: 10.1631/FITEE.1400305
关键词: Condition monitoring Feature expression Brake shoe key Machine vision
Imbalanced fault diagnosis of rotating machinery using autoencoder-based SuperGraph feature learning
《机械工程前沿(英文)》 2021年 第16卷 第4期 页码 829-839 doi: 10.1007/s11465-021-0652-4
关键词: imbalanced fault diagnosis graph feature learning rotating machinery autoencoder
Dynamic simulation of gas turbines via feature similarity-based transfer learning
Dengji ZHOU, Jiarui HAO, Dawen HUANG, Xingyun JIA, Huisheng ZHANG
《能源前沿(英文)》 2020年 第14卷 第4期 页码 817-835 doi: 10.1007/s11708-020-0709-9
关键词: gas turbine dynamic simulation data-driven transfer learning feature similarity
《机械工程前沿(英文)》 2023年 第18卷 第2期 doi: 10.1007/s11465-022-0737-8
关键词: selective laser melting (SLM) build orientation determination multi-feature mechanical part (MFMP) fuzzy analytical hierarchy process multi-objective decision making (MODM)
徐勇,杨静宇,陆建峰
《中国工程科学》 2005年 第7卷 第10期 页码 38-42
在PCA基础上发展出的KPCA方法能抽取样本的非线性特征分量。然而, 基于KPCA的特征抽取需计算所有训练样本与待抽取特征的样本间的核函数, 因此, 训练集的大小制约着特征抽取的效率。为了提高效率,假设特征空间中变换轴可由一部分训练样本(节点)线性表出,并设计了改进的KPCA算法(IKPCA)。该算法抽取某样本特征时,只需计算该样本与节点间的核函数即可。实验结果显示,IKPCA在对应较好性能的同时,具有明显的效率上的优势。
Xingfan ZHOU,Zengling YANG,Longjian CHEN,Lujia HAN
《农业科学与工程前沿(英文)》 2016年 第3卷 第2期 页码 171-179 doi: 10.15302/J-FASE-2016095
关键词: self-organizing feature maps visualization processed animal proteins (PAPs) amino acid
Blockage of receptor-interacting protein 2 expression by small interfering RNA in murine macrophages
LIU Hongchun, CAO Zhongwei, JIN Jianjun, WANG Jiyao
《医学前沿(英文)》 2008年 第2卷 第2期 页码 166-170 doi: 10.1007/s11684-008-0030-1
MSI/LOH and extron expression of the FHIT gene in gastric carcinoma
XIAO Yuping, MAO Lili, HAN Chengbo, LI Jinyi, XU Lei, XIN Yan
《医学前沿(英文)》 2007年 第1卷 第1期 页码 99-103 doi: 10.1007/s11684-007-0019-1
Gene expression disparity in giant cell tumor of bone
Xiaohua PAN, Shuhua YANG, Deming XIAO, Yong DAI, Lili REN
《医学前沿(英文)》 2009年 第3卷 第1期 页码 49-56 doi: 10.1007/s11684-009-0012-y
《医学前沿(英文)》 2022年 第16卷 第4期 页码 627-636 doi: 10.1007/s11684-020-0815-4
关键词: RUNX1 gene mutation acute myeloid leukemia transcriptional repression DNA methylation
Immunohistochemical measurement and expression of Mcl-1 in infertile testes
null
《医学前沿(英文)》 2015年 第9卷 第3期 页码 361-367 doi: 10.1007/s11684-015-0395-x
The diagnosis of azoospermia represents a major challenge to andrologists as this condition may occur despite normal spermatogenesis and genital tracts. Myeloid cell leukemia-1 (Mcl-1) is a member of the Bcl-2 family of proteins involved in regulation of apoptosis in various cell types. This study aimed to investigate the immunohistochemical expression of Mcl-1 in testicular biopsies of subjects with azoospermia. Eighty-six cases with azoospermia were obtained from 509 infertile patients admitted to the Andrology Unit of the Zagazig University Hospitals from January 2010 to December 2011. Biopsies were diagnosed and classified using H&E-stained slide sections. The specimens were subjected to immunohistochemical staining for Mcl-1 and examined through light microscopy. Forty-five cases of maturation arrest (25 at spermatids and 20 at the spermatocytes), 31 cases of hypospermatogenesis (20 moderate and 11 severe), 5 cases of Sertoli?cell-only syndrome, 2 cases of basement membrane hyalinization, and 1 case of tubular and peritubular sclerosis were observed. Normal spermatogenesis was detected in 2 cases. A strong positive immunoreaction in Leydig cells was observed among all investigated specimens. A moderate reaction was detected in spermatocytes and spermatozoa in cases of normal spermatogenesis and hypospermatogenesis, but a negative reaction was detected in cases of maturation arrest and germ cell aplasia. Apoptosis was found to be associated with decreased rate of spermatogenesis. High apoptosis rates may result in azoospermia, which can occur despite normal spermatogenesis and absence of duct obstruction.
关键词: spermatogenesis testis Mcl-1 expression immunohistochemical study infertility
Shen LIU, Shengzhe SHANG, Xuezhen YANG, Huihua ZHANG, Dan LU, Ning LI
《农业科学与工程前沿(英文)》 2018年 第5卷 第3期 页码 382-389 doi: 10.15302/J-FASE-2018211
The mammary gland provides a novel method for producing recombinant proteins in milk of transgenic animals. A key component in the technology is the construction of an efficient milk expression vector. Here, we established a simple method to construct a milk expression vector, by a combination of homologous recombination and digestion-ligation. Our methodology is expected to have the advantages of both plasmid and bacterial artificial chromosome (BAC) vectors. The BAC of mouse whey acidic protein gene (mWAP) was modified twice by homologous recombination to produce a universal expression vector, and the human lysozyme gene (hLZ) was then inserted into the vector by a digestion-ligation method. The final vector containing the 8.5 kb mWAP 5′ promoter, 4.8 kb hLZ genomic DNA, and 8.0 kb mWAP 3′ genomic DNA was microinjected into pronuclei of fertilized mouse embryos, to successfully generate two transgenic mouse lines that expressed recombinant human lysozyme (rhLZ) in milk. The highest expression level of rhLZ was 0.45 g·L−1, and rhLZ exhibited the same antibacterial activity as native hLZ. Our results have provided a simple approach to construct a universal milk expression vector, and demonstrated that the resulting vector regulates the expression of hLZ in milk.
关键词: BAC recombinant methods gene expression human lysozyme transgenic mice milk expression vector
JIANG Yuan, TIAN Xuehong, YUAN Jie, JIN Yuemei, TAN Yusong
《医学前沿(英文)》 2007年 第1卷 第4期 页码 398-400 doi: 10.1007/s11684-007-0077-4
关键词: anticarcinogenic microvessel density malignant potency muscle uterine leiomyosarcoma
Yun KONG, Tianyang WANG, Zheng LI, Fulei CHU
《机械工程前沿(英文)》 2017年 第12卷 第3期 页码 406-419 doi: 10.1007/s11465-017-0419-0
Planetary transmission plays a vital role in wind turbine drivetrains, and its fault diagnosis has been an important and challenging issue. Owing to the complicated and coupled vibration source, time-variant vibration transfer path, and heavy background noise masking effect, the vibration signal of planet gear in wind turbine gearboxes exhibits several unique characteristics: Complex frequency components, low signal-to-noise ratio, and weak fault feature. In this sense, the periodic impulsive components induced by a localized defect are hard to extract, and the fault detection of planet gear in wind turbines remains to be a challenging research work. Aiming to extract the fault feature of planet gear effectively, we propose a novel feature extraction method based on spectral kurtosis and time wavelet energy spectrum (SK-TWES) in the paper. Firstly, the spectral kurtosis (SK) and kurtogram of raw vibration signals are computed and exploited to select the optimal filtering parameter for the subsequent band-pass filtering. Then, the band-pass filtering is applied to extrude periodic transient impulses using the optimal frequency band in which the corresponding SK value is maximal. Finally, the time wavelet energy spectrum analysis is performed on the filtered signal, selecting Morlet wavelet as the mother wavelet which possesses a high similarity to the impulsive components. The experimental signals collected from the wind turbine gearbox test rig demonstrate that the proposed method is effective at the feature extraction and fault diagnosis for the planet gear with a localized defect.
关键词: wind turbine planet gear fault feature extraction spectral kurtosis time wavelet energy spectrum
Speech emotion recognitionwith unsupervised feature learning
Zheng-wei HUANG,Wen-tao XUE,Qi-rong MAO
《信息与电子工程前沿(英文)》 2015年 第16卷 第5期 页码 358-366 doi: 10.1631/FITEE.1400323
关键词: Speech emotion recognition Unsupervised feature learning Neural network Affect computing
标题 作者 时间 类型 操作
Real-time monitoring of brake shoe keys in freight cars
Rong ZOU,Zhen-ying XU,Jin-yang LI,Fu-qiang ZHOU
期刊论文
Imbalanced fault diagnosis of rotating machinery using autoencoder-based SuperGraph feature learning
期刊论文
Dynamic simulation of gas turbines via feature similarity-based transfer learning
Dengji ZHOU, Jiarui HAO, Dawen HUANG, Xingyun JIA, Huisheng ZHANG
期刊论文
Build orientation determination of multi-feature mechanical parts in selective laser melting via multi-objective
期刊论文
composition differences between processed protein from different animal species by self-organizing feature
Xingfan ZHOU,Zengling YANG,Longjian CHEN,Lujia HAN
期刊论文
Blockage of receptor-interacting protein 2 expression by small interfering RNA in murine macrophages
LIU Hongchun, CAO Zhongwei, JIN Jianjun, WANG Jiyao
期刊论文
MSI/LOH and extron expression of the FHIT gene in gastric carcinoma
XIAO Yuping, MAO Lili, HAN Chengbo, LI Jinyi, XU Lei, XIN Yan
期刊论文
Gene expression disparity in giant cell tumor of bone
Xiaohua PAN, Shuhua YANG, Deming XIAO, Yong DAI, Lili REN
期刊论文
Distinct gene expression pattern of mutations coordinated by target repression and promoter hypermethylation
期刊论文
Construction of a universal recombinant expression vector that regulates the expression of human lysozyme
Shen LIU, Shengzhe SHANG, Xuezhen YANG, Huihua ZHANG, Dan LU, Ning LI
期刊论文
Relationship of adrenomedullin expression and microvessel density and prognosis in smooth muscle tumor
JIANG Yuan, TIAN Xuehong, YUAN Jie, JIN Yuemei, TAN Yusong
期刊论文
Fault feature extraction of planet gear in wind turbine gearbox based on spectral kurtosis and time wavelet
Yun KONG, Tianyang WANG, Zheng LI, Fulei CHU
期刊论文