排序方式： 共有25条查询结果，搜索用时 265 毫秒
1.
介绍了在C语言程序设计过程中内存和变量的关系,对集中内存的分区进行了说明,然后分析了内存泄漏的原因,并提出了相应的预防措施. 相似文献
2.
余思慧 《湖南民族职业学院学报》2007,(4)
创造力包含创造的灵感和创造的实施,在艺术设计中起着举足轻重的作用,个性变量、动机变量、社会变量是影响艺术设计中创造力的三大因素,只有充分发挥变量的积极作用,才能使创造力在艺术设计中释放更大的能量。 相似文献
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目前国内对高新区绩效的研究存在评价目标单一、评价内容模糊不清的问题.为有效评价我国高新区绩效水平,基于高新区的"高新技术"和"政府引导"两个基本内涵和多元化的功能定位,以37个国家高新区为例,运用三阶段数据包络分析(DEA)模型测算其剔除环境和随机误差前后的综合效率、纯技术效率、规模效率以及规模报酬.结果表明:我国高新区整体绩效水平良好,而高新区综合效率无效的原因主要来源于规模效率无效;运用传统DEA模型测算存在纯技术效率被低估、规模效率被高估且被低估程度大于被高估程度的问题;对于高新区绩效,市场开放程度、宏观经济情况的影响为正,而产业结构、政策支持的影响为负.为进一步优化我国高新区资源配置,提出政府有关管理部门应当重视营造良好环境,对高新区的发展科学统筹规划,并加强引导和协调等政策建议. 相似文献
4.
Mark L. Berenson 《Decision Sciences Journal of Innovative Education》2013,11(3):243-262
There is consensus in the statistical literature that severe departures from its assumptions invalidate the use of regression modeling for purposes of inference. The assumptions of regression modeling are usually evaluated subjectively through visual, graphic displays in a residual analysis but such an approach, taken alone, may be insufficient for assessing the appropriateness of the fitted model. Here, an easy‐to‐use test of the assumption of equal variance (i.e., homoscedasticity) as well as model specification is provided. Given the importance of the equal‐variance assumption (i.e., if uncorrected, severe violations preclude the use of statistical inference and moderate violations result in a loss of statistical power) and given the fact that, if uncorrected, a misspecified or underspecified model could invalidate an entire study, the test developed by Halbert White in 1980 is recommended for supplementing a graphic residual analysis when teaching regression modeling to business students at both the undergraduate and graduate levels. Using this confirmatory approach to supplement a traditional residual analysis has value because students often find that graphic displays are too subjective for determining what constitutes severe from moderate departures from the equal variance assumption or for assessing patterns in plots that might indicate model misspecification or underspecification. 相似文献
6.
证明了几个复变量空间Cn中著名的Bochner-Martinelli核的二个再生定理。设 表示超球面，则有，称为Bochner-Martinelli核的一个再生性质。设，,则为Bochner-Martinelli核的另一再生性质。二个再生定理在研究多复变数哥西型积分中有重要作用。 相似文献
7.
建构主义对复变函数与积分变换教学的启示 总被引：6，自引：0，他引：6
建构主义学习观认为学习是学习者在一定情景下主动建构的过程.建构主义学习观下的教学活动应突出学生的主动性,强调让学生在一定的情境下以合作的方式进行意义的建构.建构主义教学观为复变函数与积分变换的教学提供了重要的指导意义. 相似文献
8.
Based on Williams and Andersen's model of stress and athletic injury, six psychosocial variables were assessed as possible moderators of the relationship between life stress and injury among 121 athletes (65 males, 56 females) competing in a variety of sports at state, national or international level. No significant effects of the sex of the participants were evident. Correlational analyses revealed moderator effects of several variables. Specifically, dispositional optimism and hardiness were related to decreased injury time-loss in athletes when positive life change increased, and global self-esteem was associated with decreased injury time-loss when both negative life change and total life change increased. The results indicate that athletes with more optimism, hardiness or global self-esteem may cope more effectively with life change stress, resulting in reduced injury vulnerability and recovery rates. 相似文献
9.
吴银忠 《常熟理工学院学报》2000,14(2):90-92
在一些特殊的边界条件下,探讨了应用分离变量法求解空间静电场问题的基本步骤及其在教学中应该注意的几个问题． 相似文献
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