Abnormal Noise Test Method of Vehicle Hydraulic Shock Absorber

The work principle and abnormal noise test method of hind vehicle hydraulic shock absorber are analyzed, Based on experiment data and signal character analyse ,a test method is found to distinguish the abnormal noise of rear hydraulic shock absorber. Practical validates that the reliability rate of this test method can be over 98 percents, and it can be satisfied with the request of the factory. At last, the reason of abnormal noise is analyzed and simulated, the reason of different signal attenuation is explained, and the research conclusion is educed.     

Optimal Control System for UPFC

This paper first analyzes the internal dynamic process of the UPFC,then a five order differential equation is presented to describe dynamic behavior of UPFC. In term of this,a optimal control system is designed.Dynamic simulation of a transmission system demonstrates the effectiveness.     

Analysis of Fuzzy Control Strategy Based on Energy and Peak Value of Vibration

The effect of damping on vibration is analyzed during the suspension deformation based on the 1/4 vehicle model. The Fuzzy logic control strategy for the semi-active suspension was proposed. By means of dissipating the energy of vibration and decreasing the peak value of the body acceleration via the action of damping, the parameter-self-adjust fuzzy controller was established. The united simulation of ADAMS and Matlab/Simulink were used for demonstrating the efficiency of the controller. Comparing with the practical passive suspension possessing the nonlinear character and the present fuzzy controller, the control system based on the new-style strategy provides better ride comfort and road handling.     

Optimal Design of Plane Cascades Based on Wavelet Theory

Based on the optimal control theory and Lagrange interpolation an optimal design model of plane cascades of 3D blade in an arbitrary surface of revolution is established. Using wavelet theory to solve the model, and lots of numerical results are obtained. The results show that the wavelet method is more effective than the conventional methods.     

An Application of Hamilton-Jacobi-Bellman Equation in Optimal Investment

The simple portfolio investment model is given, with the HJB equation. The optimal portfolio investment problem is discussed under some given supposition, the quantitative relations are gotten between the investment strategies and riskless investment income rate and risk investment income rate are gotten. And with the quantitative relations, we study the qualitative relations between the investment strategies and riskless investment income rate and risk investment income rate. This also accounts for the effect of the falling interest rate of RMB on the national economy.     

白僵菌可分散油悬浮剂防治稻纵卷叶螟的药效研究

为探讨白僵菌可分散油悬浮剂防治稻纵卷叶螟的适宜浓度,进行了3个不同试验浓度与苏云金杆菌可湿性粉剂、清水的对比试验.结果表明：50g/667m2的白僵菌可分散油悬浮剂防治稻纵卷叶螟的效果最好,防效达85.58％.     

不同冷冲击处理时间对黑宝石李果实贮藏品质的影响

以黑宝石李为试材、0℃的冰水混合物为冷却介质,研究了不同冷冲击处理时间(1、2、3、4 h)对贮藏期间黑宝石李果实采后生理及品质的影响。在0~1℃条件下贮藏96d和19~21℃条件下7d货架期的试验结果表明,冷冲击处理有利于保持果实硬度和可溶性固形物含量,可在一定程度上延缓细胞膜透性的增大和丙二醛含量的升高,显著抑制酚类物质含量的下降及多酚氧化酶活性的上升,对提高黑宝石李果实的抗冷性和延缓衰老起到了一定的促进作用。其中冷冲击处理2h和3h的果实褐变和冷害程度轻微,硬度和好果率较高,李子酸甜可口,香味较浓,综合品质最好。     

Numerical Simulation of the Interaction of a Shock Wave with a Dust Deposit During the Initial Stages

The trajectories and characteristics of a solid particle which is raised from a dust deposit after the passage of a weak shock wave are explored by numerical simulations and compared with available experiments and previous computational models. The present model shows general good agreement with laboratory experiments under various test conditions.     

Amelioration of Drought-Induced Transplanting Shock in Rice by an Abscisic Acid Analog in Combination with the Growth Retardant Tetcyclacis

The protective effect of a synthetic terpenoid analog of abscisic acid (ABA), coded LAB 173711, on transplant shock in rice was investigated under field conditions. Rice seedlings (Fujisaka 5 and IR 20) were taken from a seed bed and their roots were immersed in aqueous solutions of the growth regulators for 24 h. Afterwards they were drought-stressed for 3 or 6 h by exposing them to direct sunlight before they were transplanted to the field. A pretreatment with either LAB 173711 alone or in combination with the growth retardant tetcyclacis reduced the loss of water during the exposure to sunlight, increased the percentage of survival of the seedlings in the field, and increased the percentage of grain filling of the plants which had survived. The combined application of growth regulators was most effective and may be useful for minimizing transplant shock in rice and other crops.     

3株枯草芽孢杆菌对烟草白粉病的防效

为探明3株枯草芽孢杆菌对‘云烟87’白粉病的防效,以枯草芽孢杆菌制得的悬浮剂、菌悬液和低毒化学农药为试验材料,开展其对白粉病防效的研究。室内结果表明,YWF-19-0068、YWF-19-0070、YWF-19-0071生防制剂10倍液对烟草白粉病的防效分别达70.49%、61.15%、69.71%,50倍菌悬液对白粉孢子的萌发抑制率分别达56.92%、56.92%、58.46%。室外结果表明,3株枯草芽孢杆菌制剂不同剂量用药10天后,50倍液的大田防效最优,分别可达46.85%、65.50%、51.70%;选取YWF-19-0070菌株悬浮制剂分别在甲基硫菌灵全量和半量用药一次后,每隔3天使用一次,最后一次用药10天后,甲基硫菌灵全量处理的防效达77.73%以上;甲基硫菌灵半量处理的防效达60.23%以上。     

Analysis on Optimal Service Frequency of Public Transport Considered with Generalised Cost

The service frequency is an important factor which shows the supply and service level of public transportion. By considering the effect of occupancy rate on generalised cost firstly, the authors establish a new public transport model based on generalised cost. Then from the view of optimal pricing, this paper constructs two optimal service frequency models by the aim of maximizing social welfare and maximizing profit separately. The result shows that, without the effect of externalities, the two optimal service frequency is the same. Finally, this paper use some parameters of generalised cost, which coming from a city, to simulate this model, and the result shows it is feasible.     

Optimal design on the hydraulic system of CVT based on response speed and tracking accuracy

Aiming at speed ratio’s lag, tracking deviation and pulleys’ slipping and over clamping during clamping force control of CVT (continuously variable transmission) hydraulic system, corresponding optimal design methods are employed based on the practical structure of speed ratio control and clamping force control system, and the speed ratio control and clamping force control are employed by the optimal design of the system’s structural parameters. Combine with vehicle’s start-up working condition, simulation analysis is carried out on the platform of AMESim. The analysis results show that the dynamic characteristics and precision of tracking deviation are improved by the optimal design system.     

Adaptive Iterative Learning Control of Nonlinear Systems with Unknown Control Direction

An adaptive iterative learning control scheme is proposed for a class of mismatched nonlinear systems with periodic uncertainties and unknown control directions. The control algorithm has the following three features;the control method does not need control direction information; the periodic uncertainties are learned online by a learning control method; and the algorithm can deal with mismatched uncertainties. The proposed method can achieve asymptotical convergence along a learning repetition horizon. A simulation example is provided can demonstrate the effectiveness and feasibility of the control strategy.     

Improvement Methods of Fuzzy Control with Intelligent Integration

Fuzzy controller can achieve satisfactory dynamic performance even for complicated process without mathematical model of the process.Its main imperfection is the existence of steady state error and ultimate oscillatory in the process output. This limits its application area. How to eliminate the steady state error while keep its good dynamic performance has been paid much attention. The strategy to introduce integral function to the conventional fuzzy control system is put forward in this paper to overcome the above problem. After expound two key factors on introducing integral action,an intelligent integral algorithm has been employed,and two methods on introduction of the intelligent integral to the fuzzy control system are proposed. Their characteristics and applied situations are summarized.     

Analysis of the Optimal Effect Radius of Regulator Station in Urban Gas Distribution Network with Medium Pressure

In urban gas network with multiple pressure ranges, there is an optimal effect radius, for which the annual calculating cost is minimal. According to the analysis of technology and economy about the gas supply with the medium pressure in urban gas transmission and distribution system, the optimal effect radius of regulator station in medium pressure gas network has been obtained.     

Analysis on Correlated Problem with Control of Uncertainty System

The majority difficulty for uncertainty system control is that agreements haven't been arrived in concept of uncertainty information and its characteristics, uncertainty system and its properties. Therefore some control problems have discussed based on some confused concepts, and the result shows that the study on uncertainty system control hasn't made great progress yet. In addition, problems concerning uncertainty system control are very wide in the practical engineering. Aimed at above problems the concept of uncertainty information and its classification, basic properties of uncertainty system and desired control strategy based on own practical experience are studied. Finally, that intelligent control strategy is wise choice for uncertainty system control based on successful engineering application.     

不同杀虫剂对水稻稻纵卷叶螟的田间防治效果评价

为延缓稻纵卷叶螟抗药性产生,验证新型药剂方案对稻纵卷叶螟的防治效果,以期为稻纵卷叶螟的科学防治提供参考依据。采用常规喷雾法进行田间药效试验,设置2个不同处理：24%虫螨腈·虱螨脲悬浮剂750 g/hm²和24%虫螨腈·虱螨脲悬浮剂450 g/hm²+150 g/L茚虫威悬浮剂300 g/hm²,对照处理为8%虫螨腈2100 g/hm²和清水对照(CK),测定24%虫螨腈·虱螨脲悬浮剂、150 g/L茚虫威悬浮剂组合用药在不同田间区域和不同品系水稻上稻纵卷叶螟的防治效果。结果表明：各组合药剂处理对稻纵卷叶螟均有较高的防效,其中宁波试验中,24%虫螨腈·虱螨脲悬浮剂750 g/hm²与24%虫螨腈·虱螨脲悬浮剂450 g/hm²+150 g/L茚虫威悬浮剂300 g/hm²对早稻/单季稻制种田稻纵卷叶螟3天后防效均在85%以上,7天后防效均在90%以上,14天后2个处理的保叶率均在90%以上;温州试验中,24%虫螨腈·虱螨脲悬浮剂750 g/hm²与24%虫螨腈·虱螨脲悬浮剂450 g/hm²+150g/L茚虫威悬浮剂300 g/hm²对单季稻防效与宁波试验一致,药后3天防效在85%以上,药后7天防效均在93%以上,14天后2个处理的保叶率同样在90%以上。各处理防效以及保叶率均优于对照处理。2种药剂组合方案对稻纵卷叶螟均有着很好的防治效果,不仅表现出优异的速效性,也表现出了较长的持效期。     

福克戊(FKW)复配种衣剂对玉米苗枯病的防治效果研究

测定了6种常用农药和2种常用种衣剂对玉米苗枯病菌的室内抑菌活性。结果表明,2%戊唑醇可湿性粉剂、25%福美双可湿性粉剂和20%福.克悬浮种衣剂抑菌效果最好。供试药剂的MIC、复配药剂联合毒力及其对靶标生物的安全性试验结果表明,20%福.克种衣剂与2%戊唑醇可湿性粉剂复配比例范围为(200~400)∶1,且联合毒力指数在150.11%~197.94%,包衣处理玉米种子安全,最佳复配比为(200~300)∶1。室内接菌条件下与田间小区防治试验表明,福.克与戊唑醇复配剂适宜药种比为1∶(50~60),对玉米苗枯病的防治效果室内达95.17%~95.62%,田间达95.13%~95.55%。