科创中国

为提高石家庄市民心河水质预测的精度和实用性,对石家庄市民心河水样进行了检测,利用模糊综合评价法对水质污染现状进行了评价,得出民心河大部分水样监测点水质都在V类,部分指标超出了景观用水水质标准,河水受到污染.因此需要采取措施改善水环境质量.

Steering control of a capsule robot in curve environment by magnetic navigation is not yet solved completely.A petal-shaped capsule robot with less steering resistance based on multiple wedge effects is presented,and an optimization method with two processes for determining the orientation of a pre-applied universal magnetic spin vector is proposed.To realize quick and non-contact steering swimming,a fuzzy comprehensive evaluation method for optimizing the steering driving angle is presented based on two evaluation indexes including the average steering speed and the average steering trajectory deviation,achieving the initial optimal orientation of a universal magnetic spin vector.To further reduce robotic magnetic vibration,a main target method for optimizing its final orientation,which is used for fine adjustment,is employed under the constrains of the magnetic moments.Swimming experimental results in curve pipe verified the effectiveness of the optimization method,which can be effectively used to realize non-contact steering swimming of the petal-shaped robot and reduce its vibration.

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.

通过分析物流信息化的涵义,在遵循指标体系构建原则基础上设计物流信息化评价指标体系,将层次分析法与模糊综合评价法结合起来进行客观评价,并且巧妙运用Excel计算表进行求解.

首先建立了一套生产型节点企业绿色度综合评价指标体系,然后综合运用熵权值法、德尔菲法、层次分析法、三角模糊函数法形成的模糊综合评价方法对绿色度的评价问题进行研究,提出了基于组合权重的三角模糊函数模糊综合评价方法及其完整的评价过程,最后以供应链上多家企业的实际数据为例进行了实证研究.

物流企业员工绩效考核的内容主要包括员工的态度和能力考核,物流企业员工绩效指标设计的内容分为绩效维度、能力维度、态度维度和个人素质等方面.物流企业员工指标体系设计的考核采用360绩效考核,考核方法主要采用KPI法和AHP法,把绩效考核的结果在报酬运用、工作调整、开发潜能等方面进行运用.

The existing research of the active suspension system(ASS) mainly focuses on the different evaluation indexes and control strategies. Among the different components, the nonlinear characteristics of practical systems and control are usually not considered for vehicle lateral dynamics. But the vehicle model has some shortages on tyre model with side-slip angle, road adhesion coefficient, vertical load and velocity. In this paper, the nonlinear dynamic model of lateral system is considered and also the adaptive neural network of tire is introduced. By nonlinear analysis methods, such as the bifurcation diagram and Lyapunov exponent, it has shown that the lateral dynamics exhibits complicated motions with the forward speed. Then, a fuzzy control method is applied to the lateral system aiming to convert chaos into periodic motion using the linear-state feedback of an available lateral force with changing tire load. Finally, the rapid control prototyping is built to conduct the real vehicle test. By comparison of time response diagram, phase portraits and Lyapunov exponents at different work conditions, the results on step input and S-shaped road indicate that the slip angle and yaw velocity of lateral dynamics enter into stable domain and the results of test are consistent to the simulation and verified the correctness of simulation. And the Lyapunov exponents of the closed-loop system are becoming from positive to negative. This research proposes a fuzzy control method which has sufficient suppress chaotic motions as an effective active suspension system.

Pneumatic actuators and electric actuators have almost been applied to all manufacturing industries.The two kinds of actuators can replace each other in most fields,such as the point to point transmission occasion and some rotating occasions.However,there are very few research results about the advantages and disadvantages of two kinds of actuators under the same working conditions so far.In this paper,a novel comprehensive assessment method,named as overall life cycle comprehensive assessment(OLCCA),is proposed for comparison and assessment of pneumatic and electric actuators.OLCCA contains mechanical properties evaluation(MPE),life cycle cost analysis based on users(LCCABOU)and life cycle environmental impact analysis(LCEIA)algorithm in order to solve three difficult problems:mechanical properties assessment,cost analysis and environmental impact assessment about actuators.The mechanical properties evaluation of actuators is a multi-objective optimization problem.The fuzzy data quantification and information entropy methods are combined to establish MPE algorithm of actuators.Two kinds of pneumatic actuators and electric actuators with similar bearing capacity and similar work stroke were taken for example to verify the correctness of MPE algorithm.The case study of MPE algorithm for actuators verified its correctness.LCCABOU for actuators is also set up.Considering cost complex structure of pneumatic actuators,public device cost even method(PDCEM)is firstly presented to solve cost division of public devices such as compressors,aftercooler,receivers,etc.LCCABOU method is also effective and verified by the three groups of pneumatic actuators and electric actuators.Finally,LCEIA model of actuators is established for the environmental impact assessment of actuators.LCEIA data collection method and model establishment procedure for actuators are also put forward.With Simapro 7,LCEIA comparison results of six actuators can be obtained:Fossil fuels are the major environmental factor of pneumatic and electric actuators;Environmental impact of electric actuator is large than one of pneumatic actuator under the similar mechanical properties and working conditions of pneumatic and electric actuators.The results are correct and correspond with the actual mechanical properties of actuators.This paper proposes a comprehensive evaluation method of the actuators,which can solve the critical problem that similar electromechanical products are very difficult to be compared with each other from the angle of performance,cost and environment impact.

针对目前恒温浴缸的技术缺陷,提出一种基于单片机控制的智能恒温浴缸的设计方案.该设计方案不但能实现恒温浴缸的所有功能需求,水温调节灵活方便,而且更大程度上注重系统运行过程中的稳定性和安全性,在硬件结构和软件设计上采取了多种保护的措施.从样机的运行测试结果来看,系统运行稳定、安全可靠,取得了满意的设计效果.

煤炭运输网络优化设计的目标是使煤炭运输网络广义费用最小.研究的广义费用由运输费用、延误费用及其权重构成,通过分析煤炭运输网络流量分配目标,运用基于三角模糊数的模糊层次分析法得到各目标权重,进而确定各目标对总目标的贡献大小.