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让有刷DC或双极步进电机驱动变得更容易
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作者 jose quinones 《今日电子》 2012年第1期31-33,共3页
众所周知,步进电机能够在开环条件下进行电流变向的同时,还能对速度和位置实施精确的控制。因此,在谈到电子驱动的简便性时,步进电机具有无与伦比的优势。另外,同许多由一些有刷DC电机或者三相无刷DC电机组成的类似伺服驱动器相比... 众所周知,步进电机能够在开环条件下进行电流变向的同时,还能对速度和位置实施精确的控制。因此,在谈到电子驱动的简便性时,步进电机具有无与伦比的优势。另外,同许多由一些有刷DC电机或者三相无刷DC电机组成的类似伺服驱动器相比,它还具有另一种与身具来的能力:指定位置保持。 展开更多
关键词 步进电机驱动 DC电机 双极 位置保持 伺服驱动器 电子驱动 行电流 简便性
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Liver Metastases from Gynecological Cancers: Time to Resection?
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作者 jose M.Ramia Roberto De La Plaza +3 位作者 jose quinones Pilar Veguillas Farah Adel Jorge Garcia-Parreno 《Surgical Science》 2012年第3期120-125,共6页
Aim: To perform an update of liver resection as treatment of liver metastases of gynecological cancers, as well as an update on these metastases. Bibliographical search: PubMed Search 1990-2011 in English language. Au... Aim: To perform an update of liver resection as treatment of liver metastases of gynecological cancers, as well as an update on these metastases. Bibliographical search: PubMed Search 1990-2011 in English language. Authors reviewed only relevant articles. Results: No more than 20 relevant articles have been published on this topic, including case reports. We performed a classical review of the information published in the literature. Conclusions: Liver Metastases from Gynecological cancers, not peritoneal implants in the liver, usually appear in patients with disseminated disease, so it is uncommon to perform a liver resection. In some patients with limited extrahepatic disease or only liver disease, liver resection is a safe alternative and improves the oncological results. We try to emphasize which patients may benefit from liver resection and the importance of tailoring medical decisions. 展开更多
关键词 LIVER METASTASIS GYNECOLOGY OVARY CANCER Review
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