藏族中学初中物理学困女生成因初探

受传统宗教文化的影响,在藏族家庭中女孩一般不受家长的重视,在生活中她们的意见一般也不会被 采纳. 被动接受的生活习惯使藏族女生在物理知识的学习中困难很大,根据考试成绩可看出,在班级前10名的女生 中,有80% 左右的女生物理成绩不及格或远低于其他学科的成绩. 因此,从排除心理障碍、改变思维方式、用发展性 评价几方面入手,将激发藏族中学初中物理学困女生学习物理的兴趣、主动参与学习、体验学习的成功当做研究重 点,使她们的科学素养、学习的有效性和物理成绩能够有所提升     

让我们一起创新

在如今这个快节奏、动荡和充满不确定性的世界里,创新是实现可持续商业成功的关键。那些有能力培养实现创新所必需的创造力、并且有效实现其设想的公司,更有可能获得长期的成功。     

申遗成功不是目的传承发展是最高目标——在全省珠心算教育科研工作会议上的讲话摘要

同志们：今天在这里召开全省珠心算教育科研工作会议．这是我省继2008年7月省珠协在七台河市召开教育科研工作会议之后,时隔五年召开的第二次教育科研工作会议。这次会议的主要任务,是研究如何进一步开展珠心算教育科研工作,探讨提高珠心算教育质量的有效方法,落实珠算文化遗产传承的具体措施。     

西安光机所孵化企业推出首台国产化1000W工业光纤激光

由中科院西安光学精密机械研究所孵化的高新技术产业公司——西安中科梅曼激光科技有限公司,在继成功实现400W、600W工业级光纤激光器之后,又于近日成功推出了国内首台拥有自主知识产权的1000W工业级光纤激光器,并结合所生产的激光器初步形成了激光加工系统的集成能力。     

Normal projection: deterministic and probabilistic algorithms

We consider the following problem： for a collection of points in an n-dimensional space, find a linear projection mapping the points to the ground field such that different points are mapped to different values. Such projections are called normal and are useful for making algebraic varieties into normal positions. The points may be given explicitly or implicitly and the coefficients of the projection come from a subset S of the ground field. If the subset S is small, this problem may be hard. This paper deals with relatively large S, a deterministic algorithm is given when the points are given explicitly, and a lower bound for success probability is given for a probabilistic algorithm from in the literature.     

Hyperconcentration Based on Projection Measurements

We propose an efficient hyperconcentration protocol for distilling maximally hyperentangled state from partially entangled pure state, resorting to the projection measurement on an auxiliary photon. In our scheme, two photons simultaneously entangled in polarization states and spatial modes are considered. One party performs quantum nondemolition detections on his photon and an additional photon to produce three photon hyperentangled state, then he projects the assistant photon into an orthogonal basis composed of both the polarization and spatial degree of freedom. Then the state of the left two photons collapses into maximally hyperentangled state with a certain probability. In the rest cases, some less-entangled states are obtained, which can be used as resource for the next round concentration. By repeating the concentration process for several rounds, a higher success probability can be obtained, which makes our scheme useful in practical quantum information applications.     

Probabilistic Remote Preparation of a Tripartite High-Dimensional Equatorial Entangled State

We present a scheme for probabilistic remote preparation of a tripartite qutrit entangled state with a partial tripartite qutrit entangled state and a partial bipartite qutrit entangled state as the quantum channel. It is found that a bipartite qutrit orthogonal projective measurement, an auxiliary qutrit particle, and the corresponding unitary transformation are required. A scheme for probabilistic remote preparation of a tripartite qudit equatorial entangled state by using a partial tripartite qudit entangled state and a partial bipartite qudit entangled state as the quantum channel is also proposed. We calculate the successful total probability and the total classical communication cost required in the RSP process, respectively.     

Teleportation of Atomic States in a Vacuum-Induced Environment

We present a scheme for teleporting atomic state through a dissipative quantum channel induced by spontaneous emission and investigate the destructive effect of the atomic decay on the success probability and the fidelity of teleportation associated to different channels. It is found that there exists an optimal channel to realize faithful teleportation.     

我的求学科研之路

收到编辑部的邀约,让我从女性科研工作者的角度,分享自己求学和科研的经历。对此,我感觉既荣幸又有些犹豫。我只是一名普通的科研工作者,尚在摸索前进中,一直在向那些更优秀的人看齐,远没有达到分享成功经验的高度。但一路走来,我确实发现科学界女性工作者偏少,并且我能感受到大众对科研工作者的好奇与疑惑,也一直想尽自己的力量做些什么。借此,或许把我的科研经历——包括顺利与挫折——真实的分享出来,能够帮助到曾经和我一样彷徨过的女生。希望每一个人都可以更勇敢地追求自己的梦想,在适合自己的领域里绽放光芒。     

合理开发可再生资源的向量微分模型及其应用

本文首先建立了接年龄分组的可再生资源，各年龄组数量应满足的向量微分模型．然后利用所建模型成功地解决了CMCM96A题中的问题2。