Effective Hybrid Teaching-learning-based Optimization Algorithm for Balancing Two-sided Assembly Lines with Multiple Constraints

Due to the NP-hardness of the two-sided assembly line balancing （TALB） problem, multiple constraints existing in real applications are less studied, especially when one task is involved with several constraints. In this paper, an effective hybrid algorithm is proposed to address the TALB problem with multiple constraints （TALB-MC）. Considering the discrete attribute of TALB-MC and the continuous attribute of the standard teaching-learning-based optimization （TLBO） algorithm, the random-keys method is hired in task permutation representation, for the purpose of bridging the gap between them. Subsequently, a special mechanism for handling multiple constraints is developed. In the mechanism, the directions constraint of each task is ensured by the direction check and adjustment. The zoning constraints and the synchronism constraints are satisfied by teasing out the hidden correlations among constraints. The positional constraint is allowed to be violated to some extent in decoding and punished in cost fimction. Finally, with the TLBO seeking for the global optimum, the variable neighborhood search （VNS） is further hybridized to extend the local search space. The experimental results show that the proposed hybrid algorithm outperforms the late acceptance hill-climbing algorithm （LAHC） for TALB-MC in most cases, especially for large-size problems with multiple constraints, and demonstrates well balance between the exploration and the exploitation. This research proposes an effective and efficient algorithm for solving TALB-MC problem by hybridizing the TLBO and VNS.

Dynamic grey model of verification cycle and lifecycle of measuring instrument and its application

Two dynamic grey models DGM (1, 1) for the verification cycle and the lifecycle of measuring instrument based on time sequence and frequency sequence were set up, according to the statistical feature of examination data and weighting method. By a specific case, i.e. vernier caliper, it is proved that the fit precision and forecast precision of the models are much higher, the cycles are obviously different under different working conditions, and the forecast result of the frequency sequence model is better than that of the time sequence model. Combining dynamic grey model and auto-manufacturing case the controlling and information subsystems of verification cycle and the lifecycle based on information integration, multi-sensor controlling and management controlling were given. The models can be used in production process to help enterprise reduce error, cost and flaw.

PERIOMARTHRITIS TREATED WITH PAIN POINT PRESSURE IN COMBINATION WITH LOCAL EXERCISES

Periomarthritis is a traumatic ordegenerative lesion of the shoulder joint andadjacent tissues, characterized by shoulderpain which is worse during the night, andlimitation of abduction, intorsion andextorsion of the shoulder joint. The age ofonset is usually around 50 years, though

Study on Control of Pneumatic Selecting and Shifting Actuators Using Rapid Control Prototyping

A gearbox in-the-loop control platform using dSPACE real-time system is designed for the study on the control technology of pneumatic selecting and shifting actuators based on rapid control prototyping.The operational principle of such actuators was analyzed using dSPACE hardware and software,resulting in a better knowledge of the logical relationship among solenoid valves,gear positions of cylinders and system input/output.Based on these,a control model was developed under the Matlab/Simulink environment and rapidly improved to meet requirements through experiments.Relevant tests have shown that analysis efficiency on selecting and shifting actuators could be raised and development of control strategy facilitated.

Wear and Corrosion Properties of Mo Surface-modified Layer in TiNi Alloy Prepared by Plasma Surface Alloying

In order to improve the wear resistance and restrain nickel release of TiNi alloys,the Mo modified layers on TiNi substrates were obtained using the double glow plasma surface alloying technique.Scanning electron microscopy（SEM）,glow discharge optical emission spectroscopy（GDOES） and X-ray diffraction（XRD） were employed to investigate the morphology,composition and structure.Microhardness test and scratch test were performed to analyze the microhardness and coating/substrate adhesion.Tribological and electrochemical behaviors of the Mo modified layers on TiNi were tested by the reciprocating wear instrument and electrochemical measurement system.The Ni concentrations in Hanks’ solution where surface electrochemical tests took place were measured by mass spectrometry.The surface-modified layer contained a Mo deposition layer and a Mo diffusion layer.The X-ray diffraction analysis revealed that the modified layers were composed of Mo,MoTi,Mo Ni,and Ti2Ni.The microhardnesses of the Mo modified layers treated at 900 ℃ and 950 ℃ were 832.8 HV and 762.4 HV,respectively,which was about 3 times the microhardness of the TiNi substrate.Scratch tests indicated that the modified layers possessed good adhesion with the substrate.Compared with as-received TiNi alloy,the modified alloys exhibited significant improvement of wear resistance against Si3N4 with low normal loads during the sliding tests.Mass spectrometry displayed that the Mo alloy layers had successfully inhibited the Ni release into the body.

Analysis on the Application and Improvement of Canopy without Sunshade Curtain

Nowadays,in order to expand the roof view to bring passengers closer to nature,more and more new energy vehicles are opting for canopy designs without sunshades.However,after removing traditional sunshades,new solutions must be sought to address issues such as heat insulation,glaring sunlight,and interior reflections from the roof glass during the summer months.This paper conducts an in-depth analysis of the technical advantages and shortcomings of sunshade-free canopy in terms of heat insulation and interior reflections during summer,from both theoretical analysis and experimental comparison perspectives,and proposes improvement strategies.The research results indicate that although the panoramic roof enhances the vehicle's interior view and technological appeal,it still has shortcomings in terms of heat insulation and the problem of interior reflections caused by direct sunlight.The proposed improvement strategies can effectively mitigate these issues,and offers consumers more comfortable and intelligent driving experiences.

Observation on Therapeutic Effect in Acupuncture Treatment of Soft Tissue Injuries by Differentiation of Deficient and Excessive Patterns

Objective： To compare the therapeutic effects between the needling method by identification of deficient and excessive patterns and the needling method by routine meridian differentiation in the treatment of soft tissue injuries. Methods. 380 cases of the patients with soft tissue injuries were randomly divided into pattern identification group （200 cases, with the needling method by identification of deficient and excessive patterns） and meridian identification group （180 cases, with the needling method by routine meridian differentiation）, to observe and compare the therapeutic effects in the two groups. Results： The curative effect was 86% in the pattern identification group and 31.11% in the meridian identification group, with a significant difference （P〈 0.01）. In comparison with the total average treatment times in the cured and improved cases, the pattern identification group was 8.8 days and the meridian identification group was 15.6 days, with a remarkable significant difference （P〈 0.01）. The pattern identification group was better than the meridian identification group. Conclusion： In the treatment of soft tissue injuries, the needling method by identification of deficient and excessive patterns was better than the needling method by routine meridian differentiation.

METHOD OF PROFILE REFINEMENT OF X-RAY AND ANALYSIS OF STRESS ON MATERIALS

Ⅰ. INTRODUCTIONIt is clear from the analysis of product failure and the quality management that the failure of machine parts is induced by the following factors: stress, environment and time. The force factor is the stress applied on the material. X-ray stress detection technology has been developed quickly during the recent decade.

经济萧条下的5+2选车之道

2009年第一季,经济形势变坏的消息不用刻意听,都会塞满你的耳朵,让你对未来保持谨小慎微的态度,但与此同时,买车减税的消息却也不绝于耳,经济危机对于持币待购者来说,似乎也未尝不是个好消息。行文之前,先简单做个调查:有多少人的家庭成员结构是4个老人加2个成人加1个孩子?如果回答肯定,则请仔细考虑家庭用车的实际需求,出一次远门能否一次满足?需要两台车才能成行吗?另外一台车的司驾是否能安全行车?路上的两车互相跟车能否顺利?最后,用两台车出行是不是违背了我们节省的初衷?