口腔颌面部肿瘤系头颈部肿瘤的重要组成部分,不同国家、不同肿瘤、发病率有很大的差别。来自Global Cancer Statistics 2008年数据显示,头颈部恶性肿瘤发病率较高,位居全身恶性肿瘤的第6位,其中口腔癌位于第12位[1]。外科手术为其主要...口腔颌面部肿瘤系头颈部肿瘤的重要组成部分,不同国家、不同肿瘤、发病率有很大的差别。来自Global Cancer Statistics 2008年数据显示,头颈部恶性肿瘤发病率较高,位居全身恶性肿瘤的第6位,其中口腔癌位于第12位[1]。外科手术为其主要治疗方法,恶性肿瘤大都发展较快,并带有较大的破坏性。随着肿瘤的不断增大,癌细胞会侵入附近的淋巴管及血管,口腔颌面部的特殊部位特点,常使癌细胞早期向下颌、刻下及颈深淋巴结转移,因此扩大根治性切除手术后常出现较大的术后缺损区。展开更多
This paper presents Charge-Coupled Device time-series photometric observations of the open cluster NGC 1582 and its surrounding field with Johnson B, V and R filters by using the Nanshan 1 m telescope administered by ...This paper presents Charge-Coupled Device time-series photometric observations of the open cluster NGC 1582 and its surrounding field with Johnson B, V and R filters by using the Nanshan 1 m telescope administered by Xinjiang Astronomical Observatory. 19 variable stars and three variable candi- dates were detected in a 45＇ - 48.75＇ field around the cluster. 12 of the variable stars are newly-discovered variable objects. The physical properties, classifications and memberships of these 22 objects are studied through their light curves, their positions on the color-magnitude diagram and with archival data from the Naval Observatory Merged Astrometric Dataset. Among these objects, five are eclipsing binary systems, six are pulsating variable stars including one known 6 Scuti star and one newly-discovered RR Lyrae star. The distance to the RR Lyrae star is estimated to be 7.9 - 0.3 kpc, indicating that the star is located far behind the cluster. Four variable stars are probable members of the cluster, and 13 of the 22 objects are confirmed to be field stars.展开更多
文摘口腔颌面部肿瘤系头颈部肿瘤的重要组成部分,不同国家、不同肿瘤、发病率有很大的差别。来自Global Cancer Statistics 2008年数据显示,头颈部恶性肿瘤发病率较高,位居全身恶性肿瘤的第6位,其中口腔癌位于第12位[1]。外科手术为其主要治疗方法,恶性肿瘤大都发展较快,并带有较大的破坏性。随着肿瘤的不断增大,癌细胞会侵入附近的淋巴管及血管,口腔颌面部的特殊部位特点,常使癌细胞早期向下颌、刻下及颈深淋巴结转移,因此扩大根治性切除手术后常出现较大的术后缺损区。
基金supported by the National Natural Science Foundation of China under Grant No.11273051the program of Light in China Western Region(LCWR,Grant Nos.XBBS201221 and 2015-XBQN-A-02)
文摘This paper presents Charge-Coupled Device time-series photometric observations of the open cluster NGC 1582 and its surrounding field with Johnson B, V and R filters by using the Nanshan 1 m telescope administered by Xinjiang Astronomical Observatory. 19 variable stars and three variable candi- dates were detected in a 45＇ - 48.75＇ field around the cluster. 12 of the variable stars are newly-discovered variable objects. The physical properties, classifications and memberships of these 22 objects are studied through their light curves, their positions on the color-magnitude diagram and with archival data from the Naval Observatory Merged Astrometric Dataset. Among these objects, five are eclipsing binary systems, six are pulsating variable stars including one known 6 Scuti star and one newly-discovered RR Lyrae star. The distance to the RR Lyrae star is estimated to be 7.9 - 0.3 kpc, indicating that the star is located far behind the cluster. Four variable stars are probable members of the cluster, and 13 of the 22 objects are confirmed to be field stars.
