科创中国

目的研究急性胰腺炎磁共振严重度指数(MR Severity Index,MRSI)与急性生理与慢性健康状况评分系统(the Acute Playsiology And Chronic Healthy Evaluation,APACHEⅡ)之间的相关性,探讨是否可以利用MRSI来评估急性胰腺炎的严重程度.方法回顾性分析119例急性胰腺炎患者的MRI表现.每侧AP息者在MR上的严重程度用MR严重程度指数(MR Severity score iridex,MRSI)进行分级,MRSI 0-2分为轻型,3-6分中度,7-10分为重型.同时根据患者的临床和实验室参数对每例患者行APACHEⅡ评分,并对MRSI与APACHEⅡ评分进行相关性分析.结果根据MRSI,119例急性胰腺炎中,轻型急性胰隙炎48例,中度59例,重症急性胰腺炎12例.53例APACHEⅡ≤7分,66例APACHEⅡ≥8分.MRSI与APACHEⅡ评分存在弱的正相关关系(r=0.314,P〈0.01).结论MRSI能在一定程度上反映急性胰腺炎的临床严重程度,应纳入全面评价急性严重程度的评价体系中.

分析传统学术论文和开放存取论文现有评价方法的不足与困难之处;融合层次分析法和同行评议所具有的优势,提出开放存取论文评价的框架、流程以及具体实现方法.最后通过实验验证其评价效果,结果显示该方法的评价结果与文章的真实值相近.

目的 建立顺铂致小鼠急性肾功能损伤动物模型.方法 腹腔注射顺铂10 mg/kg,以造成小鼠急性肾损伤模型,空白对照组给予等量生理盐水.给药后第8日,戊巴比妥钠麻醉小鼠,取血,检测血清中肌酐(CRE)、尿素氮(BUN)水平,并对各组动物的肾脏组织进行病理学检查.结果 模型组动物血清CRE、BNU显著升高,肾系数降低,肝脏系数增加,体重增长及免疫器官重量均受到抑制.肾脏病理结果显示,模型组动物肾小管上皮细胞浑浊肿胀,结构不清,有轻度纤维增生,肾间质有炎性细胞浸润灶.结论 7~8周龄成年小鼠一次性腹腔注射给予顺铂10 mg/kg可成功建立急性肾损伤动物模型.

目的 调查北京某社区脑卒中患者的健康行为现状.方法 采用一般资料调查表和健康促进生活方式量表Ⅱ对160名社区脑卒中患者进行调查分析.结果 脑卒中患者健康行为均分为(2.62±0.34)分,各维度得分从高到低依次为:营养、人际关系、压力管理、健康责任、自我实现和运动锻炼.文化程度、日常生活活动能力水平是脑卒中患者健康行为的影响因素.结论 北京社区脑卒中患者健康行为总体水平处于中等,社区护理人员要采取有效措施,促使脑卒中患者建立健康行为.

在学校组织的正式教师工作评价体系之外,还存在着学生群体自发传播形成的对教师的非正式评价-教师口碑.教师口碑可以被纳入大学教师工作评价体系,成为评价大学教师教育教学的依据和参考.通过对北京地区六所研究型大学高年级本科生的问卷调查发现:高校中正式组织的学生评教活动在结果分析和信息公开等诸多方面仍普遍存在不足;在正式的信息获取渠道不完善的情况下,教师口碑是学生获得教师信息和分享课程经验的重要途径;大学教师口碑在学生中间主要通过口口相传的方式传播,具有较高的可信度和影响力;教师良好的修养学识和课堂教学能力是学生最关心的教师特质,而教师的科研能力、社会工作和荣誉等特质则因其所授课程的性质不同,而受到不同程度的关注.

The existing research of steering comfort mainly focuses on the subjective evaluation,aiming at designing and optimizing the steering system.In the development of steering system,especially the evaluation of steering comfort,the objective evaluation methods considered the kinematic characteristics of driver steering maneuver are not proposed,which means that the objective evaluation of steering cannot be conducted with the evaluation of kinematic characteristics of driver in steering maneuver.In order to propose the objective evaluation methods of steering comfort,the evaluation of steering movement quality of driver is developed on the basis of the study of the kinematic characteristics of steering maneuver.First,the steering motion trajectories of the driver in both comfortable and certain extreme uncomfortable operation conditions are detected using the Vicon motion capture system.The operation conditions are under the restrictions of the vertical height and horizontal distance between steering wheel center and the H-point of driver,and the steering resisting torque else.Next,the movement quality evaluation of driver steering maneuver is assessed using twelve kinds of evaluation indices based on the kinematic analyses of the steering motion trajectories to propose an objective evaluation method.Finally,an integrated discomfort index of steering maneuver is proposed on the basis of the regression analysis of subjective evaluation rating and the movement quality evaluation indices,including the Jerk,Discomfort and Joint Torque indices.The test results show that the proposed integrated discomfort index gives a good fitting with the subjective evaluation of discomfort,which means it can be used to evaluate or predict the discomfort level of steering maneuver.This paper proposes an objective evaluation method of steering comfort based on the movement quality evaluation of driver steering maneuver.

针对期刊评价实践中专家评审数据获取困难的问题,建议利用现有引文数据库提供的信息构建新型专家评议指标,以测度期刊在学科专家群体中的影响力.提出期刊z指数指标并以国内图情类核心期刊为例进行实证研究,认为该方法能有效获取可反映专家评价意见的客观数据,而且具有成本低、可信度较高等优势.

The existing researches of the evaluation method of ride comfort of vehicle mainly focus on the level of human feelings to vibration. The level of human feelings to vibration is influenced by many factors, however, the ride comfort according to the common principle of probability and statistics and simple binary logic is unable to reflect these uncertainties. The random fuzzy evaluation model from people subjective response to vibration is adopted in the paper, these uncertainties are analyzed from the angle of psychological physics. Discussing the traditional evaluation of ride comfort during vehicle vibration, a fuzzily random evaluation model on the basis of annoyance rate is proposed for the human body's subjective response to vibration, with relevant fuzzy membership function and probability distribution given. A half-car four degrees of freedom suspension vibration model is described, subject to irregular excitations from the road surface, with the aid of software Matlab/Simulink. A new kind of evaluation method for ride comfort of vehicles is proposed in the paper, i.e., the annoyance rate evaluation method. The genetic algorithm and neural network control theory are used to control the system. Simulation results are obtained, such as the comparison of comfort reaction to vibration environments between before and after control, relationship of annoyance rate to vibration frequency and weighted acceleration, based on ISO2631/1(1982), ISO 2631–1(1997) and annoyance rate evaluation method, respectively. Simulated assessment results indicate that the proposed active suspension systems prove to be effective in the vibration isolation of the suspension system, and the subjective response of human being can be promoted from very uncomfortable to a little uncomfortable. Furthermore, the novel evaluation method based on annoyance rate can further estimate quantitatively the number of passengers who feel discomfort due to vibration. A new analysis method of vehicle comfort is presented.

In order to find a parameter as the evaluation index that can capture the effect of the interaction between asphalt and aggregate, the rheological properties of asphalt mastics using two kinds of asphalts and four kinds of aggregates under different filler-asphalt ratios were measured by a dynamic shear rheometer (DSR). Moreover, four rheological parameters of K.Ziegel-B, Luis Ibrarra-A, complex shear modulus ΔG*and complex viscosity Δη* for evaluating the interaction ability were studied. Results indicate that all the four parameters can characterize the interaction ability of asphalt and aggregate correctly and feasibly. Through the comparison of sensitivities and physical meanings of the four parameters, K.Ziegel-B with high sensitivity and exact physical meaning is finally selected as the evaluation index for interaction ability of asphalt and aggregate.

以我国物流企业竞争力评价为总目标,建立相应的竞争力评价指标体系,通过运用层次分析法确定了各层次指标权重,在此基础上根据模糊综合评价方法实证评价了物流企业的竞争力,为物流企业合理配置资源和提高自身竞争力提供理论参考和有价值的思路.