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Search Results: 1 - 10 of 277397 matches for " 李生 "
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同一性发展与沉浸探索
Identity Development and Ruminative Exploration
 [PDF]


Advances in Psychology (AP) , 2015, DOI: 10.12677/AP.2015.512097
Abstract:
Marcia (1966)提出的同一性状态理论主导了同一性研究,但难以解释同一性发展过程。Luyckx等人(2006a, 2008a)提出的双环模型同时考虑了同一性过程和结果,拓展并修正了同一性状态理论。个体在同一性发展中可能由于自身和环境原因,长期无法作出未来决定而陷入沉浸探索,引发一系列心理社会问题。沉浸探索具有特定的表现、形成过程和行之有效的应对策略。现代社会的青少年越来越需要指导和支持以摆脱沉浸探索和同一性危机。深入了解沉浸探索和同一性发展过程的表现及机制,有助于把握个体成长规律并获得完善的自我发展。
Identity status theory proposed by Marcia (1966) dominated identity researches, while it is difficult to explain the process of identity development. Dual-cycle model proposed by Luyckx et al. (2006a, 2008a), taking into account the identity process and results, expanded and revised the identity status theory. Some people can’t make a long-term future decision constantly and be trapped in ruminative exploration due to individual or environmental factors during the identity development process, triggering a series of psycho-social problems. Ruminative exploration has specific performance, formation process and some effective coping strategies. Young people in modern society have a growing need for guidance and support to promote them to get through ruminative exploration and identity crisis. Understanding the performance and mechanisms of identity development process and ruminative exploration thoroughly can help individuals better grasp the regular patterns of growth and gain complete self-development.
同一性自主发展:阻碍与促进因素
Independent Development of Identity: Discourage and Encourage Factors
 [PDF]


Advances in Psychology (AP) , 2016, DOI: 10.12677/AP.2016.64047
Abstract:
同一性是一个不断发展变化的概念,反映了研究者对其内涵和发展过程认识的加深。同一性发展受到生理、心理、社会等内容的交互影响,许多因素常常阻碍或者促进同一性发展。根据个体是否进行了积极主动的探索,区分出达成和早闭这两种具有不同表现的状态。同一性发展也受到个体内部动机的影响,同一性的成功经验能够促进同一性积极发展。父母和同伴既可以作为发展榜样和支持力量,也可能成为同一性发展的阻碍因素。在一些不鼓励过多探索的社会环境中,同一性探索甚至可能引发个体巨大的矛盾与冲突。对未来持有不同态度的个体,表现出差异显著的同一性发展。同一性自主发展受到阻碍,可能引发严重的问题行为和发展危机。
Identity is a developing and changing concept, reflecting researchers’ deepening understanding of its connotation and development process. The development of identity is influenced by the inte-raction of physiology, psychology and society; many factors often hinder or promote the develop-ment of the identity. According to whether the individual has a positive exploration or not, the status of achievement and the status of for closure are distinguished. Identity development is also influenced by the internal motivation of individuals, successful experience can promote the positive development of identity. Parents and peers can work as role models and supportive forces, and also may be a hindrance of identity development. Identity exploration may not be recognized or even lead to individual conflict in some social environment. Individuals who hold different attitudes towards the future show different development processes. If independent development of identity is hindered, it may lead to maladaptive behavior and the developmental crisis.
花、基因、禾本科
,陈明
植物学报 , 2007,
Abstract: ?进化发育生物学的一个重要任务就是揭示形态多样性的分子基础,该领域的研究包含形态、形态发育相关基因和形态所属类群等三个要素。花/花序是进化发育生物学研究的首要对象,系统发育重建和个体发育剖析的结合将促进认知花的形态进化。发育相关基因的进化表现为等位基因遗传或表观遗传的突变,基因家族生与死的进化,不同基因组拥有独特的基因。运用形态学或序列分析方法很大程度揭示了禾本科植物花进化过程中的基因进化。试从学科问题、思路方法以及具体例子介绍植物进化发育生物学。
磁性纳米材料在肿瘤靶向治疗中的应用
Application of Magnetic Nano-Materials in Tumor Targeted Therapy
 [PDF]

刘永, 姜炜,
Journal of Advances in Physical Chemistry (JAPC) , 2012, DOI: 10.12677/JAPC.2012.13005
Abstract:
纳米磁靶向给药系统是将纳米技术、生物技术及磁靶向技术有机结合,借助纳米磁性材料良好的磁靶向性,通过外加磁场定位,将药物选择性地聚集于病灶部位,在细胞或亚细胞水平上发挥药效作用。本文详细介绍了纳米磁性材料应用于肿瘤磁靶向治疗中的研究进展,并对其发展前景进行了展望。
The targeted drug delivery system is the combination of nanotechnology, biotechnology and magnetic targeting technology. Combined with excellent magnetic targeted property, the drug is gathered selectively at the lesion site by an external magnetic field and shows effect at the cellular or subcellular level. The application of nano-magnetic materials to tumor magnetic targeted therapy is generalized in detail and the future prospect of them is also presented in this paper.
透风型挡风板不同孔隙度大小防风特性的二维数值模拟
Numerical Simulation of Wind Characteristics of the Windshield under Different Sizes of the Porosity
 [PDF]

韩鹏, 赵建平,
International Journal of Fluid Dynamics (IJFD) , 2016, DOI: 10.12677/IJFD.2016.43008
Abstract: 本文通过建立二维非定常不可压N-S方程,采用变分多尺度方法对N-S方程进行求解并应用freefem软件对不同孔隙度,不同孔径的透风型挡风板在给定风场进行数值模拟。研究了不同孔隙度下,不同孔径透风型挡风板与不设挡风板及不透型挡风板对风场的影响。结果表明,挡风板具有较好的防风特性,适当孔隙度的透风型挡风板较不透型防风特性好。同时不同孔隙度挡风板对风场影响差异明显,同时相同孔隙度不同孔径挡风板也有较明显差异。在本实验意义下,孔隙度为20%孔径为0.5 cm,高度为50 cm挡风板具有较好的防风特性,在高200 cm,长为500 cm的风场中可以形成198 cm左右的板后涡流长度,形成涡流长度明显长于其他透风型挡风板。
Through the establishment of two-dimensional incompressible unsteady flow N-S equation, we solve the N-S equation with the use of variational multiscale methods, make numerical simulation of the wind field for different porosities and aperture ventilated wind screen and study the influence of ventilated wind screen under different porosities and aperture and non-ventilated wind screen on wind field. The results show that the wind screen has great wind resistance characteristics and the wind resistance effect of ventilated wind screen with appropriate porosity is better than that of non-ventilated wind screen. At the same time, the influences of wind screen with different porosities are significantly different and the wind screens with the same porosity but different apertures also have obvious differences. Under this experiment, the porosity is 20% while the aperture is 0.5 cm and the height is 50cm. The wind screen has great wind resistance charac-teristics, forming about 198 cm posterior vortex length in the wind field with the height of 200 cm and the length of 500cm. The vortex length is significantly longer than that of other ventilated wind screen.
三峡水库提前蓄水方案的优化选择 Optimal Scheme of Early Refill Operation for the Three Gorges Reservoir  [PDF]
,,天元,周研来
Journal of Water Resources Research (JWRR) , 2013, DOI: 10.12677/jwrr.2013.23023
Abstract: 应用Copula函数构建了联合分布及条件概率分布,通过随机抽样方法模拟得到三峡水库9月份随机入库流量序列。建立了提前蓄水方案优选模型,计算并分析了8月下旬不同来水情景下,三峡水库9月份提前蓄水方案的优化选择。研究结果表明:若8月下旬来水为丰水,则9月下旬起蓄,月底均匀蓄水至166 m,较原设计方案,在不增加防洪风险的前提下,多年平均发电量可增加1.57亿kW h (1.46%),弃水量减小10.72亿m3 (12.89%);若来水为平水,则9月中旬起蓄,月底均匀蓄水至166 m,较原设计方案,在不增加防洪风险的前提下,多年平均发电量可增加3.45亿kW h (3.40%),弃水量减小22.59亿m3 (34.19%);若来水为枯水,通过加强实时监测,则可进一步提前至9月上旬起蓄,月底均匀蓄水至166 m,较原设计方案,在基本不增加防洪风险的前提下,多年平均发电量可增加5.50亿kW h (6.12%),弃水量减小19.18亿m3 (51.89%)。 A joint distribution function and conditional probability distribution of this samples using copula was built and inflow series in September were obtained by stochastic simulation method. Furthermore, a refill operation optimization model of the Three Gorges Reservoir was established in this paper to derive the optimal refill scheme. The results show that the optimal refill scheme depends on the reservoir inflow in late August. In the wet year, refill begins in late September with storage level reaching 166 m on September 30 linearly. Comparing with designed scheme, the scheme can generate extra about 1.57 × 108 kW·h electrical energy (by 1.46%) and save 10.72 × 108 m3 water resources (by 12.89%) annually without increasing the flood control risk; In the normal year, refill begins in middle September with storage level reaching 166 m on September 30 linearly. Comparing with designed scheme, the scheme can generate extra about 3.45 × 108 kW·h electrical energy (by 3.40%) and save 22.59 × 108 m3 water resources (by 34.19%) annually without increasing the flood control risk; In the dry year, refill begins in early September with storage level reaching 166 m on September 30 linearly by strengthening real-time monitoring. Comparing with designed scheme, the scheme can generate extra about 5.50 × 108 kW·h electrical energy (by 6.12%) and save 19.18 × 108 m3 water resources (by 51.89%) annually without increasing the flood control risk.
SNP技术及其在作物研究上的应用
Single Nucleotide Polymorphism and Its Utilization in Plant Research
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石莹, , 何平,
Hans Journal of Agricultural Sciences (HJAS) , 2014, DOI: 10.12677/HJAS.2014.43010
Abstract:

SNP(单核苷酸多态性)是最新发展起来的第三代分子标记技术,具有分布广、多态信息量大、易于检测和统计分析等特点。目前,SNP技术在水稻、玉米、大豆等作物研究中应用较多。本文综述该技术在这些作物的遗传标记、分子标记辅助选择、构建高密度遗传连锁图谱、绘制EST图谱等方面的研究进展。
SNP (single nucleotide polymorphisms) had become the third generation molecular maker technology in recent years. It had the characteristics of wide distribution, the polymorphism information content big, easy detection and statistics analysis etc. In crops research, SNP had many applications, such as genetic marker, molecular marker assisted selection (MAS), construction of genetic linkage map with high density, mapping expressed sequence tag (EST), and so on.

基于视频图像的火焰检测
Flame Detection Based on Video
 [PDF]

, , 刘瑞, 王杰, 刘丹
Computer Science and Application (CSA) , 2016, DOI: 10.12677/CSA.2016.63021
Abstract: 火灾是当今生活中十分常见的自然灾害,因此及时检测火焰对预防火灾的发生十分重要。本文提出了一种基于背景差分和颜色、形状特征的火焰检测方法。该算法首先采用背景差分法,根据火焰燃烧的动态性实现对运动目标的提取,再根据火焰颜色特征的五条规则以及火焰的三个形状特征对目标区域进一步提取,得到最终的检测结果。该方法火焰检测率较高,具有较好的实用价值。
Fire as a natural disaster is very common in our life. Therefore, flame detection timely is very im-portant for the prevention of fire. In this paper, a novel fire detection method is proposed based on background subtraction, color feature and shape features. Firstly, the moving object is extracted with background image difference based on the dynamic feature of fire. Then, the target areas are extracted exactly by five rules of color feature and three shape features of fire. Finally, the suspected flame is detected. The proposed method shows more effective for fire detection and presents high use value.
柄杆菌对固氮蓝藻生物量及色素的影响

生态学报 , 1989,
Abstract: 柄杆菌对固氮蓝藻生物量和色素的影响研究结果表明:多态柄杆菌(Caulobacter polymorphus)017-41或新月柄杆菌(Caulobacter creseentus)CB_2的活菌、死菌及破碎细胞悬液分别与鱼腥藻(Anabaena)、念珠藻(Nostoc)不同藻珠混合培养时,试验组生长量均优于对照组;对衰老黄化的藻培养物的生长刺激作用尤为显著;试验组藻培养物的藻蓝或藻红素含量亦明显高于对照组。其作用机理尚待进一步阐明。
生命现象与化学耗散结构

生物化学与生物物理进展 , 1990,
Abstract: 在简单介绍了耗散结构理论的基础上,探讨了生命现象与耗散结构之间的联系,阐述了用化学耗散结构理论解释各种生物有序现象(如生物形态和生物振荡)和生物进化现象的可能性。强调了生命科学与非生命科学相结合的重要性。
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