Although real-world experiences show that preparing one image per person is more convenient, most of the appearance-based face recognition methods degrade or fail to work if there is only a single sample per person(SS...Although real-world experiences show that preparing one image per person is more convenient, most of the appearance-based face recognition methods degrade or fail to work if there is only a single sample per person(SSPP). In this work, we introduce a novel supervised learning method called supervised locality preserving multimanifold(SLPMM) for face recognition with SSPP. In SLPMM, two graphs: within-manifold graph and between-manifold graph are made to represent the information inside every manifold and the information among different manifolds, respectively. SLPMM simultaneously maximizes the between-manifold scatter and minimizes the within-manifold scatter which leads to discriminant space by adopting locality preserving projection(LPP) concept. Experimental results on two widely used face databases FERET and AR face database are presented to prove the efficacy of the proposed approach.展开更多
On the MS medium supplemented with 2 ppm 2,4-D,calli were induced after 4-6weeks from the petioles of an American celery plant （Apium graveolens var.Dulce pers.cv.Florida）.Suspension culture was started from the cal...On the MS medium supplemented with 2 ppm 2,4-D,calli were induced after 4-6weeks from the petioles of an American celery plant （Apium graveolens var.Dulce pers.cv.Florida）.Suspension culture was started from the calli in a hormone-free liquid MS medium on agyratory shaker at 110 rpm,and kept at 26℃.To stimulate cell division and dedifferentiation,thesubcultures were conducted for 7 days each on the same medium.The liquid suspension containingsingle cells,cell aggregates,and somatic embryos in different stages were screened 2-3 weekslater and 1.0-1.5mm somatic embryos were obtained.These embryos were encapsulated withsodium alginate by dropping-bead method and solidified with 0.1mol CaCl<sub>2</sub>,.These synthetic seedsgerminated and developed well into seedlings in the sterilized vermiculite substrate.展开更多
Per a 9是美洲大蠊主要过敏原蛋白之一。通过生物信息学方法了解美洲大蠊过敏原蛋白Per a 9的结构特征,为蟑螂变态反应性疾病的诊断和治疗提供线索。BLAST得到Per a 9相似序列,构建同源进化树,结果显示美洲大蠊Per a 9与德国小蠊精氨酸...Per a 9是美洲大蠊主要过敏原蛋白之一。通过生物信息学方法了解美洲大蠊过敏原蛋白Per a 9的结构特征,为蟑螂变态反应性疾病的诊断和治疗提供线索。BLAST得到Per a 9相似序列,构建同源进化树,结果显示美洲大蠊Per a 9与德国小蠊精氨酸激酶在进化上具有较近的亲缘关系。Per a 9主要为α+β结构的亲水性蛋白,其主要抗原表位集中于33—46、55—74、89—117、123—135、199—217、235—243、251—266、286—354区域。Motif预测其具有1个鸟嘌呤磷酸转移酶活性位点,6个蛋白激酶C磷酸化位点,7个酪氨酸激酶II磷酸化位点和2个N豆蔻酰化位点。其预测的三维结构基本能反应Per a 9真实的空间构象,这将为今后进一步了解和掌握Per a 9结构和功能的关系打下理论基础。展开更多
文摘Although real-world experiences show that preparing one image per person is more convenient, most of the appearance-based face recognition methods degrade or fail to work if there is only a single sample per person(SSPP). In this work, we introduce a novel supervised learning method called supervised locality preserving multimanifold(SLPMM) for face recognition with SSPP. In SLPMM, two graphs: within-manifold graph and between-manifold graph are made to represent the information inside every manifold and the information among different manifolds, respectively. SLPMM simultaneously maximizes the between-manifold scatter and minimizes the within-manifold scatter which leads to discriminant space by adopting locality preserving projection(LPP) concept. Experimental results on two widely used face databases FERET and AR face database are presented to prove the efficacy of the proposed approach.
文摘On the MS medium supplemented with 2 ppm 2,4-D,calli were induced after 4-6weeks from the petioles of an American celery plant （Apium graveolens var.Dulce pers.cv.Florida）.Suspension culture was started from the calli in a hormone-free liquid MS medium on agyratory shaker at 110 rpm,and kept at 26℃.To stimulate cell division and dedifferentiation,thesubcultures were conducted for 7 days each on the same medium.The liquid suspension containingsingle cells,cell aggregates,and somatic embryos in different stages were screened 2-3 weekslater and 1.0-1.5mm somatic embryos were obtained.These embryos were encapsulated withsodium alginate by dropping-bead method and solidified with 0.1mol CaCl<sub>2</sub>,.These synthetic seedsgerminated and developed well into seedlings in the sterilized vermiculite substrate.
文摘Per a 9是美洲大蠊主要过敏原蛋白之一。通过生物信息学方法了解美洲大蠊过敏原蛋白Per a 9的结构特征,为蟑螂变态反应性疾病的诊断和治疗提供线索。BLAST得到Per a 9相似序列,构建同源进化树,结果显示美洲大蠊Per a 9与德国小蠊精氨酸激酶在进化上具有较近的亲缘关系。Per a 9主要为α+β结构的亲水性蛋白,其主要抗原表位集中于33—46、55—74、89—117、123—135、199—217、235—243、251—266、286—354区域。Motif预测其具有1个鸟嘌呤磷酸转移酶活性位点,6个蛋白激酶C磷酸化位点,7个酪氨酸激酶II磷酸化位点和2个N豆蔻酰化位点。其预测的三维结构基本能反应Per a 9真实的空间构象,这将为今后进一步了解和掌握Per a 9结构和功能的关系打下理论基础。
