基于直方图初始化的有效的多区域Mumford-Shah图像分割方法（英文）

The Mumford-Shah energy functional is a successful image segmentation model. It is a non-convex variational problem and lacks of good initialization techniques so far. In this paper, motivated by the fact that image histogram is a combination of several Gaussian distributions, and their centers can be considered as approximations of cluster centers, we introduce a histogram-based initialization method to compute the cluster centers. With this technique, we then devise an effective multi-region Mumford-Shah image segmentation method, and adopt the recent proximal alternating minimization method to solve the minimization problem. Experiments indicate that our histogram initialization method is more robust than existing methods,and our segmentation method is very effective for both gray and color images.     

胭脂鱼胚胎及仔鱼早期发育观察

为建立胭脂鱼[Myxocyprinus asiaticus(Bleeker)]人工繁殖技术,采用连续观察法研究胭脂鱼人工授精受精卵的发育过程,详细记录了胭脂鱼胚胎发育各阶段形态特征。胭脂鱼胚胎发育从受精卵到孵化出膜可划分29个发育时期,在水温17.6℃～19.4℃条件下,胚胎发育共历时147.68h,发育积温为2572.65℃。出膜后,仔鱼经8d发育,鳔开始充气,第10天左右达到开口期。文中讨论了鱼类胚胎发育时间与温度的关系。     

新型苯并三噻吩衍生物的合成及性能

在苯并三噻吩分子(BTT)基础上,经Stille反应与2-溴-3-十二烷基噻吩进行偶联,合成了新型苯并三噻吩衍生物BTT-T,产率56.8%,其结构和性能经¹H NMR, ¹³C NMR, MS, UV, FL, CV和TG表征。结果表明：BTT和BTT-T的光学能隙分别为3.44 eV和2.75 eV;两种分子均有较好的热稳定性。     

从股民素质分析中国股市

从股民素质的角度，利用博弈理论分析证监会、上市公司、股民之间的关系，得出股民素质的高低极大地制约了中国证券市场的健康发展的结论。提出在完善制度建设的同时，还应不断提高广大股民，特别是普通股民的素质。