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491.
面对我国正在蓬勃发展的设计事业,我们如何将中国传统文化融入现代标志设计中,开辟出一片有着中国特色的标志设计领域,使其在现代设计中的应用更为广泛和深入,是一个值得我们研究和深思的话题。就此问题本文提出了将中国传统文化融入现代标志设计的观点并论证了这一观点的潜力、必要性和实施方法。  相似文献   
492.
This paper illustrates some contributions of psychoanalyticallybased thinking in social work practice with children and youthremoved from their homes due to severe maltreatment or incapacityof parents. It is suggested that when working with severelydeprived and traumatized children, the therapist should holdin mind the lacking of rapport with primary caretakers, andthe need of the child to form meaningful and intimate relationsin his or her future life. Psychoanalytically based thinkingenriches the treatment process by offering new ways for understandingof the patient’s needs, aiming to reach the child’ssubjective experience and re-establishing his sense of selfand a meaningful rapport with an other. The concept of ‘potentialspace’ and the area of experience (Winnicott, 1953/1975)will be described with elaboration on its variety and use intheory and practice, focusing on two major themes: the dialecticsof knowing and not knowing, and the search for selected material.A clinical illustration is presented to show these dynamicsas they appear in the clinical process and the therapeutic session.The material was selected from supervision of graduate socialwork students involved in therapeutic work with children.  相似文献   
493.
Using semi-structured, qualitative interviews with practitioners, this study explored an organizational approach to media relations. Interviewees provided insight as to how organizations and their media relations practitioners integrated principles of excellent public relations and principles of relationship management with principles of traditional practitioner–journalist relationships. Results indicated that the practice of media relations can be viewed as a theory-based organizational commitment at the meso-level, and not merely as an atheoretical practitioner skill at the micro-level.  相似文献   
494.
The notion of mutual benefit has been a foundational assumption for scholars who use the relationship management perspective. Although many studies have inferred that mutual benefit links to organizational outcomes, no study to date has linked quantitatively key public member perception of benefit to positive organizational results. The current investigation sought to quantify the link between respondent perception of benefit and traditional organizational outcomes such as satisfaction and behavioral intent.  相似文献   
495.
一维无限深势阱的动量几率幅和等式型不确定关系   总被引:1,自引:0,他引:1  
给出了一维无限深势阱这一特殊情况的动量几率幅和等式形式的不确定关系,导出了一个反常积分公式,弄清了根据德布罗意公式和驻波条件算出的势阱中粒子的动量实际上是粒子的方均根动量.  相似文献   
496.
Summary.  A controversial topic in obstetrics is the effect of walking on the probability of Caesarean section among women in labour. A major reason for the controversy is the presence of non-compliance that complicates the estimation of efficacy, the effect of treatment received on outcome. The intent-to-treat method does not estimate efficacy, and estimates of efficacy that are based directly on treatment received may be biased because they are not protected by randomization. However, when non-compliance occurs immediately after randomization, the use of a potential outcomes model with reasonable assumptions has made it possible to estimate efficacy and still to retain the benefits of randomization to avoid selection bias. In this obstetrics application, non-compliance occurs initially and later in one arm. Consequently some parameters cannot be uniquely estimated without making strong assumptions. This difficulty is circumvented by a new study design involving an additional randomization group and a novel potential outcomes model (principal stratification).  相似文献   
497.
本文用玻璃电极和氢电极,与Ag/AgCl电极分别构成两个电池,测定了HCl-NH_4Cl-H_2O体系在25℃,总浓度在0.1~3.0mol·kg~(-1)范围内的电动势。结果表明,玻璃电极电势不遵从Nernst方程,按离子交换平衡原理,讨论了铵离子对玻璃电极不对称电势的影响,导出了电极电势表达式为,式中为纯盐酸中玻璃电极的不对称电势,a_A为H~+的活度,Y_B为NH_4Cl的摩尔分数,S为Nernst斜率,K为离子交换平衡常数,α、β为实验参数。  相似文献   
498.
Longitudinal clinical trials with long follow-up periods almost invariably suffer from a loss to follow-up and non-compliance with the assigned therapy. An example is protocol 128 of the AIDS Clinical Trials Group, a 5-year equivalency trial comparing reduced dose zidovudine with the standard dose for treatment of paediatric acquired immune deficiency syndrome patients. This study compared responses to treatment by using both clinical and cognitive outcomes. The cognitive outcomes are of particular interest because the effects of human immunodeficiency virus infection of the central nervous system can be more acute in children than in adults. We formulate and apply a Bayesian hierarchical model to estimate both the intent-to-treat effect and the average causal effect of reducing the prescribed dose of zidovudine by 50%. The intent-to-treat effect quantifies the causal effect of assigning the lower dose, whereas the average causal effect represents the causal effect of actually taking the lower dose. We adopt a potential outcomes framework where, for each individual, we assume the existence of a different potential outcomes process at each level of time spent on treatment. The joint distribution of the potential outcomes and the time spent on assigned treatment is formulated using a hierarchical model: the potential outcomes distribution is given at the first level, and dependence between the outcomes and time on treatment is specified at the second level by linking the time on treatment to subject-specific effects that characterize the potential outcomes processes. Several distributional and structural assumptions are used to identify the model from observed data, and these are described in detail. A detailed analysis of AIDS Clinical Trials Group protocol 128 is given; inference about both the intent-to-treat effect and average causal effect indicate a high probability of dose equivalence with respect to cognitive functioning.  相似文献   
499.
本文用标准的圈图展开方法计算了非拓扑孤子模型在单圈修正下的有效势,得到了有效势的极值点满足的方程,分析了禁闭解除相变的特征.  相似文献   
500.
Based on an examination of the research literature, this paper contrasts six variables connected with the outcome of adoption and long‐term fostering. It provides some answers to the question often being asked by policy makers and family placement workers, as well as judges, about the relative merits and limitations of these two forms of substitute parenting for children who cannot return to live with their birth families. Because of the type of child currently adopted or fostered, breakdown rates by themselves are increasingly an unreliable outcome measure. The main defining difference found between these two forms of substitute parenting appears to be the higher levels of emotional security, sense of belonging and general well‐being expressed by those growing up as adopted compared with those fostered long term. However, for reasons outlined in the paper, long‐term fostering still has a definite place for a range of children who require long‐term plans.  相似文献   
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