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11.
In a basic microeconomic model (joint production and consumer's utility curves) three key optima appear: the best technological mix, the maximum profit point and the consumer's utility optimum. Compromise analysis can help to clarify their connections. This paper and other recent research attempt to specify the conditions which guarantee that these three optima coincide. Thus compromise programming becomes a valuable surrogate of economic optimization. 相似文献
12.
On rough terrain, excessive wheel slippage is easily generated by changes of surface conditions such as soil types and geometries. It induces considerable loss of wheel traction and battery energy. To prevent this, wheeled robots should consistently recognize the current situation generated between wheel and surface. And also wheeled robots are required to optimally control wheel motion in limited wheel traction and battery capacity. Therefore, this paper proposes a novel wheel control algorithm based on slip optimization of traction and energy, which is adaptive to change of surface condition. Proposed wheel control algorithm is called Traction-Energy Balancing Adaptive Control (TEB) in this paper and TEB assigns optimized rotation speed to each wheel by observing wheel slip ratio which is a key parameter of TEB. As functions of TEB, TEB is largely divided into three main parts; (1) slip optimizer (2) slip controller (3) SC-compensator. In the slip optimizer, two optimal slip models were derived as a function of slip ratios regarding maximum traction and tractive efficiency using experimental data about wheel-terrain interaction in three types of soil (grass, gravel and sand). And the optimal slip models were employed in order to determine a desired slip value of wheel with observation of a change in actual robot velocity as control input in the slip controller. For optimal slip control, the proposed slip controller is based on conventional PID controller with compensating disturbance in the controller (SC-compensator) which occurs by change of surface shapes. In the SC-compensator, radial function networks (RBFN) was applied in the slip controller and RBFN was of help to readjust previously set PID gains depending on occurred slip error. Finally, TEB was experimentally verified by controlling a real robot having four wheels on various terrain types. 相似文献
13.
Beth Kerr 《Journal of motor behavior》2013,45(1):15-27
Subjects made a speeded stylus movement along a track to a stop and simultaneously performed a simple reaction-time task designed to assess the processing demands of the movement task. Movement task variables were: (a) number of alternative ending positions — either one or two — with the choice executed during movement, and (b) presentation time for the endpoint signals in the two-choice conditions, either prior to movement initiation (immediate) or during movement execution (delay). Processing demands were higher during all movement conditions than in a control condition that did not require movement. Processing demands during execution of the one-and two-choice movement with immediate signals did not differ. However, processing demands during the two-choice movements with delayed signals were higher than demands during the two-choice movement with immediate signals. 相似文献
14.
工作场所文明行为是一种在组织文化下, 基于社会和组织角色义务的, 传达礼貌和尊重的主动性行为, 是一种向内要求自我控制, 向外主张尊重传达的行为, 它对于个体自身性格的塑造、组织中人际关系的改善以及文明氛围的培养都具有积极意义。在员工-员工、领导-下属、员工-顾客等关系中, 工作场所文明行为发挥着增进同事情谊、促进合作、增强领导力、建立信任、提升绩效等作用。未来的研究应该进一步厘清工作场所文明行为与不文明行为的关系, 运用动态视角研究它们发生、发展和被感知的机制, 以及这两种行为能否相互转化等问题。 相似文献
15.
鉴于对慢性鼻窦炎认识的转变和随之发生的治疗手段的改进,遵循循证医学的原则,灵活选用和组合适宜技术与高新技术十分必要,以期达到慢性鼻窦炎治疗的最优化. 相似文献
16.
食管癌内镜技术最优化原则的思考 总被引:1,自引:0,他引:1
随着消化内镜及其配件的不断更新和内镜医师操作技术的进步,消化内镜在食管癌的应用从诊断为主发展到诊断与治疗并重.回顾历史,医疗需求是医学科学进步的强大动力,科学技术进步推动医学的发展,内镜技术的发展促进了食管癌诊断与治疗水平的最优化. 相似文献
17.
This paper deals with optimal partitioning of limited testing time in order to achieve maximum total test score. Nonlinear
optimization theory was used to analyze this problem. A general case using a generic item response model is first presented.
A special case that applies a response time model proposed by Wang and Hanson (2005) is also presented. Theoretical properties
of the optimal solution are derived. Their practical implications to optimal test-taking strategies are also discussed. The
theoretical properties are in general agreement with the conventional advice to the examinees on pacing strategy. 相似文献
18.
下腰痛综合征的诊治与人文思想 总被引:1,自引:1,他引:0
下腰痛是一种常见的骨科病症,轻者可影响患者生活,重者可使患者丧失劳动力。它的发病原因有很多,治疗方法各有不同。在下腰痛的诊断中要按照适度医疗的原则选择合适的检查;在下腰痛的治疗中须按照最优化医疗的原则选择最佳的治疗方案。在治疗中要注意结合人文思想来提高下腰痛的治疗效果。 相似文献
19.
20.
诊疗最优化原则的伦理学探析 总被引:13,自引:6,他引:7
讨论了诊疗最优化原则的伦理学意义:它充分体现了医学的宗旨、医学职业道德理想和对患者的无私关爱,有利于纠正医疗卫生行业的时弊,昭示着医疗卫生改革发展的方向。针对实践中遇到的阻力和困惑,作者提出了促进最优化原则实施的五点建议。 相似文献