不同内包材对磺胺嘧啶银乳膏稳定性的影响

目的：考察两种不同内包装材料对磺胺嘧啶银乳膏在贮存过程中的稳定性影响。方法：通过使用药用铝质软管和药用复合软管（简称铝管和复合软管）对磺胺嘧啶银乳膏灌装后,进行长期稳定性试验,考察药物的稳定性。结果：采用铝管和复合软管内包装药物,对磺胺嘧啶银乳膏的稳定性影响有差异。结论：选择复合软管包装磺胺嘧啶银乳膏更加有利于保持药物的稳定性。     

Beyond residential mobility: A broader conceptualization of instability and its impact on victimization risk among children

Predictability in a child’s environment is a critical quality of safe, stable, nurturing relationships and environments, which promote wellbeing and protect against maltreatment. Research has focused on residential mobility's effect on this predictability. This study augments such research by analyzing the impact of an instability index—including the lifetime destabilization factors (LDFs) of natural disasters, homelessness, child home removal, multiple moves, parental incarceration, unemployment, deployment, and multiple marriages--on childhood victimizations. The cross-sectional, nationally representative sample of 12,935 cases (mean age = 8.6 years) was pooled from 2008, 2011, and 2014 National Surveys of Children’s Exposure to Violence (NatSCEV). Logistic regression models controlling for demographics, socio-economic status, and family structure tested the association between excessive residential mobility, alone, and with LDFs, and past year childhood victimizations (sexual victimization, witnessing community or family violence, maltreatment, physical assault, property crime, and polyvictimization). Nearly 40% of the sample reported at least one LDF. Excessive residential mobility was significantly predictive of increased odds of all but two victimizations; almost all associations were no longer significant after other destabilizing factors were included. The LDF index without residential mobility was significantly predictive of increased odds of all victimizations (AOR’s ranged from 1.36 to 1.69), and the adjusted odds ratio indicated a 69% increased odds of polyvictimization for each additional LDF a child experienced. The LDF index thus provides a useful alternative to using residential moves as the sole indicator of instability. These findings underscore the need for comprehensive supports and services to support stability for children and families.     

当代中国政治稳定研究综述

政治稳定对于一个国家的经济社会发展具有非常重要的意义.近年来,我国学术界从社会、理论、政治制度本身、经济、社会转型期等各个角度对我国政治稳定进行了相关研究.这些研究视角和结论对国家管理机构开展相关工作或政治学者进行有关学术研究都提供了良好的基础.本文认为影响政治稳定的关键是建立和形成一套具有组织合理、基础广泛、结构严密的政治体系,以确保国家的经济社会良性发展.     

控制继电器在汽车灯具检测中的应用

针对用单片机制作的配光性能稳定性试验点亮装置存在编程复杂、不同组合灯需要不同的控制程序、扩展性差等缺点,我院用"easy"控制继电器重新设计了一台该装置,新装置可通过面板操作设置时间继电器参数实现修改点亮方式,且具有操作简单、扩展性好等优点。     

Examining the stability of achievement goal orientation

We examined stability and change in students’ achievement goal orientations over varying tasks. Two naturalistic longitudinal studies were conducted in undergraduate courses. Students completed self-reports designed to measure their achievement goals. Achievement goals were measured four times: prior to two assignments and two exams. Four complementary analytic techniques were used to examine goal stability: differential continuity, mean-level change, individual-level change, and profile consistency. Results across both studies provide evidence for stability and change across tasks in achievement goal orientation, and comparisons made between similar and different tasks resulted in similar levels of change. Implications for theory and research in achievement goal orientation are discussed.     

The effects of adult depression on the recollection of adverse childhood experiences

Adverse childhood experiences (ACEs) have been linked to numerous negative physical and mental health outcomes across the lifespan. As such, self-report questionnaires that assess for ACEs are increasingly used in healthcare settings. However, previous research has generated some concern over the reliability of retrospective reports of childhood adversity, and it has been proposed that symptoms of depression may increase recall of negative memories. To investigate the stability of ACE scores over time and whether they are influenced by symptoms of depression, we recruited 284 participants (M age = 40.96, SD = 16.05) from primary care clinics. Participants completed self-report measures of depression and ACEs twice, three months apart. The test-retest reliability of ACEs was very high (r = .91, p < .001). A cross-lagged panel analysis indicated that PHQ-9 scores at Time 1 were not predictive of changes in ACE scores at Time 2 (β = 0.00, p = .96). Results of this study indicate that changes in symptoms of depression do not correspond with changes in ACE scores among adults. This study provides support for the stability and reliability of ACE scores over time, regardless of depression status, and suggests that ACE measures are appropriate for use in healthcare settings.     

Frequency-domain approach to robust PI control

The paper considers the problem of designing PI controllers for industrial processes approximated by a first-order time-delayed model. The suggested frequency-domain approach is based on a normalized open-loop transfer function and makes use of the loci of constant stability margins and other performance indices in the parameter space. In this way, it is possible to evaluate the effects of uncertainties in the process parameters and, thus, control system robustness. Some examples show how the procedure operates.     

当代中国政府职能革新的政治社会学诠释

政府在现代社会发展进程中扮演着重要角色,它的任何行为都会直接或间接影响到社会的资源配置和利益整合。基于政治社会学的视角而言,政府职能的革新不仅是行政问题,更是重要的社会政治问题。面对当代社会快速转型的基本国情,政府必须强化责任意识、规范自身行为、凸显预见功能。政府职能的有效转变可以提升化解社会矛盾和维持政治稳定的能力,从而为和谐社会的构建保驾护航。     

Colorado longitudinal twin study of reading disability

The primary objectives of the present study are to introduce the Colorado Longitudinal Twin Study of Reading Disability, the first longitudinal twin study in which subjects have been specifically selected for having a history of reading difficulties, and to present some initial assessments of the stability of reading performance and cognitive abilities in this sample. Preliminary examination of the test scores of 124 twins with a history of reading difficulties and 154 twins with no history of reading difficulties indicates that over the 5- to 6-year interval between assessments, cognitive and reading performance are highly stable. As a group, those subjects with a history of reading difficulties had substantial deficits relative to control subjects on all measures at initial assessment, and significant deficits remained at follow-up. The stability noted for all cognitive and achievement measures was highest for a composite measure of reading, whose average stability correlation across groups was 0.80. Results of preliminary behavior genetic analyses for this measure indicated that shared genetic influences accounted for 86% and 49% of the phenotypic correlations between the two assessments for twin pairs with and without reading difficulties, respectively. In addition, genetic correlations reached unity for both groups, suggesting that the same genetic influences are manifested at both time points.     

Velocity field control of robot manipulators by using only position measurements

In the velocity field control approach the robot motions are specified through a vectorial function that assigns the desired velocity to each point of the configuration space. In other words, a velocity field defines the robot desired velocity in the operational space as a function of its current position. In this paper is introduced a new algorithm to solve the velocity field control formulation in the robot operational space. The proposed approach assumes only joint position measurements and is based on a hierarchical structure that results of using the kinematic control concept and a joint velocity controller. To estimate the joint velocity, nonlinear filtering of the joint position is used.