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Search Results: 1 - 10 of 64053 matches for " 胡梦薇 "
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关于一类高阶微分方程的复振荡结果
,黄志刚,孙桂荣
- , 2015, DOI: 10.3969/j.issn.1000-5641.2015.01.009
Abstract: 摘要 运用微分方程复振荡理论,研究了系数是整函数的高阶微分方程解的零点分布问题,在对方程的某个系数做小的扰动的情况下,得到了方程的超越解的零点收敛指数都为无穷.
Abstract:The distribution of zeros of solutions of higher order linear differential equations with entire coefficients was investigated by using complex oscillation theory of linear differential equations. It was proved that the exponent of convergence of zeros of every transcendental solution of the equations is infinite if given a small perturbation to one of the coefficients.
响应面法优化酶法制备杏鲍菇蛋白及其营养评价
,杨文建,裴斐,赵立艳,安辛欣,马宁,,秋辉
食品科学 , 2015,
Abstract: ?为确定纤维素酶法提取杏鲍菇蛋白的最佳工艺,并评价所得蛋白的营养价值,在单因素试验的基础上,选择液料比、加酶量(以原料干粉计)、ph值和酶作用温度为影响因素,以蛋白得率为响应指标,利用box-behnken进行响应面分析,利用氨基酸系数法来评价杏鲍菇蛋白的营养价值。结果表明:杏鲍菇蛋白提取的最佳工艺为:液料比35∶1(v/m)、加酶量2.6%、ph7.2、酶解温度60℃,此条件下的杏鲍菇蛋白得率达10.68%;按此方法所得的杏鲍菇蛋白的必需氨基酸与非必需氨基酸比值(essentialaminoacids/nonessentiaaminoacids,eaa/neaa)为0.65,必需氨基酸与总氨基酸比值(eaa/totalaminoacids,taa)为0.40,氨基酸比值系数分(scoreofratiocoefficient,src)为75.02。该工艺操作简单,所得蛋白品质较高,可用于工业生产杏鲍菇蛋白产品。
沙漠小球藻转人乳铁蛋白的电转优化
汪文伦,牟云,,许万云,严国,王会敏,高剑峰
- , 2018, DOI: 10.3969/j.issn.1673-1689.2018.09.004
Abstract: 对沙漠小球藻建立高效的遗传转化方法,对电击转化的条件和相关参数进行优化。作者以人乳铁蛋白基因作为电转条件优化的参考基因,采用单因素实验确定转染效率的电转化条件,然后进行电转化正交实验,得到最优的电转化组合。结果表明:最优的电转化组合是电压1 400 V、培养周期8 d、渗透剂浓度0.2 mol/L、渗透时间为0 h、质粒质量浓度为6 ug/mL、电击缓冲液浓度为0.4 mol/L,其细胞致死率为51.30%、荧光百分率为52.54%、PCR阳性平均百分率为42.30%。
To establish an efficient genetic transformation protocol for Desert Chlorella. It was optimized methods for electroporation conditions and related parameters. Human lactoferrin gene regard as reference gene of optimization of electro-transformation conditions. The various parameters of cell viability and transfection efficiency were determined with single factor experiments.Then,the optimal electroporation conditions were obtained through orthogonal test. Results shows the optimal composition of electroporation conditions:breakdown voltage 1 400 V,cell cycle 8day,osmosis buffer 0.2 mol/L,osmosis time 0 h,plasmid 6 g/mL,electroporation buffer 0.4 mol/L. Under the optimal composition of electroporation conditions,the detected results of cell viability is 51.30%,and fluorescence positive rate is 52.54%,and PCR positive rate is 42.30%
表达性写作的治疗效果研究
Study on the Effect of Expressive Writing
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Advances in Psychology (AP) , 2014, DOI: 10.12677/AP.2014.44087
Abstract:
“表达性写作”是表达自身情绪的一种方法,它要求当事人写出关于自身的创伤经历的认识和情感。本研究采用被试间设计,以性别、写作时间、写作类型为自变量,量表前后测增值为因变量,通过对154名有效被试进行研究,获得了表达性写作的治疗效果的差异性分析。结果发现,1) 表达性写作的治疗效果存在性别差异:男性优于女性;2) 表达性写作的治疗效果在写作类别上有显著差异:与创伤经历相关的写作优于无关写作;3) 表达性写作的治疗效果在写作总时间上存在显著差异:写作时间80分钟以下优于80分钟以上;4) 性别与写作时间存在交互作用:女性写作80分钟以上效果最好;5) 写作时间与写作类型存在交互作用:写作80分钟以下与创伤经历有关的治疗效果在负性情绪上最佳;6) 性别、写作时间和写作类型存在交互作用:女性写作80分钟以上与创伤经历相关的治疗效果最佳。
Expressive writing is a way to express their emotions, which requires the understanding of the parties to write about their traumatic experiences and emotions. This research adopts the between- subjects design; taking gender, writing time and writing type as independent variables, scale before and after the test value as the dependent variable, based on 154 valid subjects for research, it obtained the expressive writing difference analysis of curative effect. The result shows that 1) the curative effects of expressive writing are different in gender: men are superior to women; 2) the curative effects of expressive writing had remarkable difference in the writing category: the writing related to traumatic experiences is better than writing irrelated; 3) the treatment effects differ in the total time of writing: writing time under 80 minutes is better than that of more than 80 minutes; 4) the gender has interaction with writing time: the female with more than 80-minute writing has the best effect; 5) the writing time interacts with writing types: the writing under 80 minutes with the treatment effect of traumatic experiences is the best on the negative mood; 6) there is interaction among gender, type and time: the treatment of women who write more than 80 minutes about traumatic experiences works best.
中国高校智库的建设与发展研究
Construction and development of university think tanks in China


- , 2018, DOI: 10.11835/j.issn.1008-5831.2018.05.009
Abstract: 高校智库是中国新型智库建设体系的重要组成部分,近5年来,中国高校智库的机构建设获得了长足发展。笔者基于对高校及高校智库机构的广泛调研,从机构数量、制度建设、专业特色、管理模式和人员规模等各方面进行了系统梳理,运用调研数据全面展示了中国高校智库的功能建设状况。在此基础之上,进一步对照两办《意见》和教育部《计划》的智库建设标准,深入分析了高校智库存在的问题和差距,并对高校智库未来的发展提出了有针对性的建议。
As an important part of China's emerging think tank system,university think tanks have got rapid development in last 5 years. Based on an extensive survey on university think tanks in China,this paper makes a systematic representation of the operation and development of the think tanks from the perspective of institution quantity,system construction,specialization feature,management regime,and staff size. Against the standards made by the central government and the Ministry of Education,the paper analyzes the problems and gaps in university think tanks and proposes some policy recommendations on their future development.
西南酸雨地区土壤中铝溶出规律的探讨
康德,庞叔
环境科学学报 , 1987,
Abstract: 本文介绍了实验室动态模拟结果,对西南地区酸性沉降引起的土壤铝淋溶过程予以探讨。通过计算机推算拟合,提出了预测土壤中铝淋溶容量计算法。运用正交实验法,研究了近似于天然的动态过程中影响铝淋溶的主要因素及各因素间的相关性。得到了当降雨pH<6.0时,酸性土或弱酸性土中铝溶量和时间呈指数关系,以及影响铝溶出因素主要是酸雨的pH值、土壤的缓冲能力和环境温度等结论。
中国人压力应对研究:基于主位与客位的视角
汪新建,
心理科学进展 , 2013,
Abstract: ?目前,学界探索中国人的应对大致有两种方式:客位研究与主位研究。客位研究分析中国文化在以下几个方面对国人应对行为和心理的影响,分别是应对的文化环境和自我特质、压力来源、应对方式、应对结果。研究结果得出有关应对的客观知识,揭示中国人的应对实践。但是由于客位研究注重理论的普适性,所以其研究成果与中国人应对实质并不十分契合。主位研究从传统文化中的儒家、道家、佛家哲学思想提取应对观,其成果更深入的分析了国人应对的实质。但是,主位研究下的应对观过于注重直观体验,并且当今中国人行为心理模式也发生了变化,这些因素势必导致主位研究的缺陷。两种研究方式各有利弊,未来的研究应把两种方式结合起来,取长补短。
酸性降水对土壤酸化及铝溶出的影响
庞叔,许宁,康德
环境化学 , 2015,
Abstract: 用静态平衡法探讨了酸性降水对土壤酸化及铝溶出的影响。实验结果表明土壤对酸的缓冲能力较强;酸雨对土壤酸化的贡献甚微,但对土壤中活性铝的溶出却有明显效应。另外,土壤本身的特性(如酸碱度,腐殖质含量及温度等)也起很大作用。对于地质条件相近的土壤,由于本身的pH值不同,铝的溶出量差别很大,一般而言,酸性土铝的溶出量高于碱性土。因此,可以推断我国西南地区酸性降水可能对当地土壤生态存在着潜在的危害。
儒家思想与压力应对:应激研究的本土心理学视角
,赵守盈
- , 2014,
Abstract: 儒家式应对思想包括对压力的认知以及针对压力的应对行为。儒家面对挫折和困苦的态度是坦然的,艰难困苦是成长必须经历的。当压力与困境超出个人能力时,儒家引入“命”的概念来缓解个人面临重大压力时的挫折感。儒家强调从个人的内在修养和外在行为这两方面来应对压力。儒家式应对突破了西方应对观中仅重视非精神性应对方式的局限,融合了精神性与非精神性的应对方式,是源自本土的有效应对方式之一,也是理解中国人民族特性的重要切入点。
The Confucian paradigm of stress management includes the cognition of and the reaction to pressure. Considering sufferings indispensible to growth, Confucianism advocates keeping aloof from difficulties and pains. When the stress is beyond one’s ability to cope with, Confucianism introduces the notion of destiny to alleviate the pressure. Confucians emphasize a person’s internal cultivation and external behavior and maintain that stress can be managed from these two aspects. Rising above the western skewed view on stress management, which puts too much emphasis on non-psychological means, the Confucian way of coping with stress integrated psychological and non-psychological means. As an effective Chinese way of coping with stress, it also constitutes an important access to Chinese national character
杜邦财务分析体系研究
文献,
财会月刊 , 2005,
Abstract: 杜邦财务分析体系是美国杜邦公司提出的一种财务分析方法。其基本原理是将财务指标作为一个系统,将财务分析与评价作为一个系统工程,全面评价企业的偿债能力、营运能力、盈利能力及其相互之间的关系,在全面财务分析的基础上进行全面财务评价,使评价者对企业的财务状况有深入的认识,进而进行有效的财务决策。其基本特点是以净资产收益率为核心指标,将偿债能力、营运能力及盈利能力有机地结合起来,层层分解,逐步深入,构成一个完整的财务分析系统,全面、系统、直观地反映企业的财务状况。  一、现有杜邦财务分析体系的缺陷  1.现有杜邦财务分析体系的分解指标不能反映上市公司的特色,如股东权益股份化、每股净资产、合并利润表中的“少数股东权益”项目等。  2.现有杜邦财务分析体系以净资产收益率为核心指标进行分析存在一些问 题,不完全符合上市公司股东财富最大化的要求。
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