讨论了国际移动用户识别码(international mobile subscriber identification, IMSI)获取的两种方式并提出了IMSI及相应的信息在交通态势分析、交通运输监管、重点营运车辆的精准定位、智能网联汽车拓展应用、静态停车场景中的应用,为...讨论了国际移动用户识别码(international mobile subscriber identification, IMSI)获取的两种方式并提出了IMSI及相应的信息在交通态势分析、交通运输监管、重点营运车辆的精准定位、智能网联汽车拓展应用、静态停车场景中的应用,为基于移动终端的身份识别技术在交通运输领域的应用提供了新的思路和解决方案。展开更多
针对手机被盗带来的隐私数据泄露问题,提出了一种利用IMSI(international mobile subscriber identification number)检测和人脸识别的手机防盗追踪系统。针对IMSI检测,给出了一种分层—二分查找的查找方法,并在手机用户数据库上进行了...针对手机被盗带来的隐私数据泄露问题,提出了一种利用IMSI(international mobile subscriber identification number)检测和人脸识别的手机防盗追踪系统。针对IMSI检测,给出了一种分层—二分查找的查找方法,并在手机用户数据库上进行了多组对比实验,结果表明该方法具有较高的查找效率。针对人脸识别,提出了一种基于Gabor二值模式和分块加权的单样本人脸识别算法,该算法在FERET人脸数据库上表现出良好的识别性能。通过该系统可以确定被盗手机的位置和非法用户身份信息,提高了找回手机的可能性。展开更多
Intracytoplasmic sperm injection （ICSI） is the recommended treatment in many cases of male-factor infertility. Several studies have demonstrated a positive correlation between optimal sperm morphology and positive I...Intracytoplasmic sperm injection （ICSI） is the recommended treatment in many cases of male-factor infertility. Several studies have demonstrated a positive correlation between optimal sperm morphology and positive ICSI outcomes. In fact, spermatozoa with severe abnormalities of the head are well documented to be associated with low fertilisation, implantation and pregnancy rates. However, a spermatozoon which is classified as ＇normal＇ by microscopic observation at low magnification could contain ultrastructural defects that impair both the fertilisation process and embryonic development. The intracytoplasmic morphologically selected sperm injection （IMSI） procedure changed the perception of how a spermatozoon suitable for injection should appear. Sperm selection is carried out at x 6000 magnification, allowing improved assessment of the sperm nucleus. Currently, standardized clinical indications for I MSI are lacking and the candidates are selected on the grounds of their medical history or of a careful analysis of the sperm suspension. Further prospective randomized studies are needed to confirm the advantages of IMSI in specific groups of patients. In addition to providing a brief overview of the IMSI procedure, this study aims to review the literature, which explains the theoretical basis and the clinical outcomes of this technique. Several reports show that IMSI is associated with improved implantation and clinical pregnancy rates as well as lower abortion rates when compared to ICSI. Although a possible correlation between the sperm＇s abnormal nucleus shape, increased DNA fragmentation and negative laboratory and clinical outcomes has been long investigated, the results are conflicting.展开更多
Sperm of poor quality may affect syngamy after fertilization, embryo development up to the blastocyst stage and reproductive outcome. Subsequently, sperm selection based on morphological characteristics and sperm DNA ...Sperm of poor quality may affect syngamy after fertilization, embryo development up to the blastocyst stage and reproductive outcome. Subsequently, sperm selection based on morphological characteristics and sperm DNA quality may help to partially avoid these problems. Today, highly efficient sperm selection based on morphological characteristics can be attained using the motile sperm organelle morphology (MSOME) examination, and the spermatozoa selected can be used for ICSI through a fertilization strategy known as intra-cytoplasmic morphologically selected sperm injection (IMSI). The aim of this investigation was to develop a simple methodology to assess sperm DNA fragmentation in single spermatozoa following MSOME/ IMSI, to test the hypothesis that morphologically normal spermatozoa, with an absence of vacuolization, is free of DNA damage. The results indicated that MSOME/IMSI-selected sperm, combined with the Sperm Chromatin Dispersion test (SCD;Oligo-Halosperm), can be reliably used to assess sperm DNA damage in selected single spermatozoa (75% average efficiency), thereby establishing a direct relationship between a good morphological pattern on the sperm and a good DNA quality. Furthermore, results showed spermatozoa presenting a normal morphology and no traces of vacuolization to be fully free of DNA damage. However, traces of vacuolization and more severe morphological alterations were accompanied by significant increases in the proportion of sperm containing a damaged DNA molecule. Interestingly, subtle morphological differences observed between normal and non-vacuolated and normal but vacuolated sperm exhibited significant differrences in the ability of the SCD-Oligo-Halosperm treated sperm to expand DNA fibers following protein depletion.展开更多
文摘讨论了国际移动用户识别码(international mobile subscriber identification, IMSI)获取的两种方式并提出了IMSI及相应的信息在交通态势分析、交通运输监管、重点营运车辆的精准定位、智能网联汽车拓展应用、静态停车场景中的应用,为基于移动终端的身份识别技术在交通运输领域的应用提供了新的思路和解决方案。
文摘针对手机被盗带来的隐私数据泄露问题,提出了一种利用IMSI(international mobile subscriber identification number)检测和人脸识别的手机防盗追踪系统。针对IMSI检测,给出了一种分层—二分查找的查找方法,并在手机用户数据库上进行了多组对比实验,结果表明该方法具有较高的查找效率。针对人脸识别,提出了一种基于Gabor二值模式和分块加权的单样本人脸识别算法,该算法在FERET人脸数据库上表现出良好的识别性能。通过该系统可以确定被盗手机的位置和非法用户身份信息,提高了找回手机的可能性。
文摘Intracytoplasmic sperm injection （ICSI） is the recommended treatment in many cases of male-factor infertility. Several studies have demonstrated a positive correlation between optimal sperm morphology and positive ICSI outcomes. In fact, spermatozoa with severe abnormalities of the head are well documented to be associated with low fertilisation, implantation and pregnancy rates. However, a spermatozoon which is classified as ＇normal＇ by microscopic observation at low magnification could contain ultrastructural defects that impair both the fertilisation process and embryonic development. The intracytoplasmic morphologically selected sperm injection （IMSI） procedure changed the perception of how a spermatozoon suitable for injection should appear. Sperm selection is carried out at x 6000 magnification, allowing improved assessment of the sperm nucleus. Currently, standardized clinical indications for I MSI are lacking and the candidates are selected on the grounds of their medical history or of a careful analysis of the sperm suspension. Further prospective randomized studies are needed to confirm the advantages of IMSI in specific groups of patients. In addition to providing a brief overview of the IMSI procedure, this study aims to review the literature, which explains the theoretical basis and the clinical outcomes of this technique. Several reports show that IMSI is associated with improved implantation and clinical pregnancy rates as well as lower abortion rates when compared to ICSI. Although a possible correlation between the sperm＇s abnormal nucleus shape, increased DNA fragmentation and negative laboratory and clinical outcomes has been long investigated, the results are conflicting.
文摘Sperm of poor quality may affect syngamy after fertilization, embryo development up to the blastocyst stage and reproductive outcome. Subsequently, sperm selection based on morphological characteristics and sperm DNA quality may help to partially avoid these problems. Today, highly efficient sperm selection based on morphological characteristics can be attained using the motile sperm organelle morphology (MSOME) examination, and the spermatozoa selected can be used for ICSI through a fertilization strategy known as intra-cytoplasmic morphologically selected sperm injection (IMSI). The aim of this investigation was to develop a simple methodology to assess sperm DNA fragmentation in single spermatozoa following MSOME/ IMSI, to test the hypothesis that morphologically normal spermatozoa, with an absence of vacuolization, is free of DNA damage. The results indicated that MSOME/IMSI-selected sperm, combined with the Sperm Chromatin Dispersion test (SCD;Oligo-Halosperm), can be reliably used to assess sperm DNA damage in selected single spermatozoa (75% average efficiency), thereby establishing a direct relationship between a good morphological pattern on the sperm and a good DNA quality. Furthermore, results showed spermatozoa presenting a normal morphology and no traces of vacuolization to be fully free of DNA damage. However, traces of vacuolization and more severe morphological alterations were accompanied by significant increases in the proportion of sperm containing a damaged DNA molecule. Interestingly, subtle morphological differences observed between normal and non-vacuolated and normal but vacuolated sperm exhibited significant differrences in the ability of the SCD-Oligo-Halosperm treated sperm to expand DNA fibers following protein depletion.
