几种萱草核型的比较研究

Some species of Hemerocallis were cultivated in the campus of Futan Un- iversity, including the evergreen H. aurantiaca Baker.  The original plant of H. auran- tiaca was introduced from Zhangzhou, southeastern Fukien Province.  The karyotype formula of H. aurantiaca is 2n=33=12m+9sm+3st+3T+6m(sat).   The  karyotype differs from those of summer-green or evergreen H. fulva (k(2n)=33=3M+21m+6sm +3T) and H. fulva var. kwanso (K(2n)=33=3M+l8m+6sm+3st+3T).  The vouchers are kept in FUS.     

Ecological principle meets cancer treatment: treating children with acute myeloid leukemia with low-dose chemotherapy

Standard chemotherapy regimens for remission induction of pediatric acute myeloid leukemia (AML) are associated with significant morbidity and mortality. We performed a cohort study to determine the impact of reducing the intensity of remission induction chemotherapy on the outcomes of selected children with AML treated with a low-dose induction regimen plus granulocyte colony stimulating factor (G-CSF) (low-dose chemotherapy (LDC)/G-CSF). Complete response (CR) after two induction courses was attained in 87.0% (40/46) of patients receiving LDC/G-CSF. Post-remission therapy was offered to all patients, and included standard consolidation and/or stem cell transplantation. During the study period, an additional 94 consecutive children with AML treated with standard chemotherapy (SDC) for induction (80/94 (85.1%) of the patients attained CR after induction II, P = 0.953) and post-remission. In this non-randomized study, there were no significant differences in 4-year event-free (67.4 vs. 70.7%; P = 0.99) and overall (70.3 vs. 74.6%, P = 0.69) survival in the LDC/G-CSF and SDC cohorts, respectively. After the first course of induction, recovery of white blood cell (WBC) and platelet counts were significantly faster in patients receiving LDC/G-CSF than in those receiving SDC (11.5 vs. 18.5 d for WBCs (P < 0.001); 15.5 vs. 22.0 d for platelets (P < 0.001)). To examine the quality of molecular response, targeted deep sequencing was performed. Of 137 mutations detected at diagnosis in 20 children who attained hematological CR after two courses of LDC/G-CSF (n = 9) or SDC (n = 11), all of the mutations were below the reference value (variant allelic frequency <2.5%) after two courses, irrespective of the treatment group. In conclusion, children with AML receiving LDC/G-CSF appear to have similar outcomes and mutation clearance levels, but significantly lower toxicity than those receiving SDC. Thus, LDC/G-CSF should be further evaluated as an effective alternative to remission induction in pediatric AML.     

中国土壤微生物组:进展与展望

文章分析了国际土壤微生物组的研究现状和发展趋势,阐述了土壤微生物组研究的前沿科学问题,综述了中国土壤微生物组的主要科研进展,提出了中国土壤微生物组研究的机遇和挑战,探讨了土壤-微生物系统功能及其调控所需的主要技术手段与能力建设,期望通过"土壤-微生物系统功能及其调控"中科院战略性先导科技专项研究,为深度发掘土壤微生物组资源,定向调控土壤微生物组功能,解决我国经济社会发展面临的生态环境、农业生产及资源瓶颈等问题起到应有的贡献。     

Intermittent control strategy for synchronization of fractional-order neural networks via piecewise Lyapunov function method

In this paper, the synchronization problem of fractional-order neural networks (FNNs) with chaotic dynamics is investigated via the intermittent control strategy. Two types of intermittent control methods, the aperiodic one and the periodic one, are applied to achieve the synchronization of the considered systems. Based on the dynamic characteristics of the intermittent control systems, the piecewise Lyapunov function method is employed to derive the synchronization criteria with less conservatism. The results under the aperiodically intermittent control show more generality than the ones via the periodically intermittent control. For each of the aperiodic and periodic cases, a simple controller design process is presented to show how to design the corresponding intermittent controller. Finally, two numerical examples are provided to demonstrate the effectiveness of the obtained theoretical results.     

国外技术标准战略经验及其对广东的启示

分析“技术标准战略”概念内涵及其与产业发展的关系;研究和总结欧盟控制型、美国争夺型、日本谨慎重优型和韩国重点开拓型技术标准战略模式的实践经验.广东在“一带一路”和粤港澳大湾区建设背景下积极推进建设国内先进、国际化水平高的技术标准体系,但仍存在工作机制不完善、公众参与度低、技术研发与标准缺乏联动性以及重点产业标准化力度不...     

高校思想政治理论课灌输教学法创新之探究

灌输教学法是高校思想政治理论课教学的重要方法之一.在高校思想政治理论课教学中要坡灌输教学法保持其有效性,就要从灌输的载体、方法方面进行创新,显性灌输教学法与臆性渗透教学法相结合;理论灌输法与启发法相结合;理论灌输法与大学生自我教育法相结合;大力提升教师的素质等.     

2009物理试题中数学知识的运用

2009年的高考试题中,有许多新颖、原创的试题值得我们品味。一些试题中涉及特殊数学知识的运用,现举例浅析如下,请同行批评指正。     

高等教育学研究生从事高校辅导员工作的SWOT分析

采用SWOT模型分析了高等教育学研究生从事高校辅导员工作的优势和劣势,并重点做了SO策略分析,提出了采取树立观念、提高自身素质、参与实践活动等手段,促进高等教育学研究生的专业发展.     

基于纯声子散射模型的纳米薄膜热传导分析

起粘结作用的薄膜结构厚度达到纳米尺度时,应用由微尺度观点建立的非傅立叶热传导模型分析其性能.文章采用纯声子散射模型分析绝缘薄膜结构的温度场和热应力,并与用在宏观尺度下的傅立叶热传导模型所得结果进行比较,同时研究绝缘薄膜结构热物理性能参数对温度场和热应力的影响.研究表明:采用纯声子散射模型分析结果与傅立叶热传导模型所得结果有明显区别,绝缘薄膜结构熟物理性能参数对温度场和热应力也有显著影响.     

浅谈英语教学中文化背景知识运用的重要性

大学英语教学的目的是培养学生的综合应用能力,教师应该在传授语言知识的同时,重视对学生文化背景知识的培养,有效提高学生跨文化交际的能力.