OPTIMAL DESIGN WITH WHOLE STRUCTURE PARAMETERS OF LOWER PART OF HUGE EXCAVATOR     

Liu Chongde Wang Xiaoming Gu Lan 《保鲜与加工》1992,(6):10-17

A optimal design with whole structure parameters and its program are carried out. A reasonable model is established. Using the method a optimal design with whole structure parameters by original parameters of American P&H2300xp excavator was calculated. The size,carried out by the method,approximates to the size of P&H2300xp excavator very well.  相似文献   

The Influence of Wire Diameter on the Forced Convection of Oil in a Tube with Spiral Spring Inserts     

Chen Li Jiang Qiugu Lei Junming 《保鲜与加工》1993,(3):1-6

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THE FULL LOADING HISTORY ANALYSTS OF PRESTRESSED CONCRETE GRIDS WITH UNBONDED TENDONS     

Wang Zhenglin Chen Benxian 《保鲜与加工》1988,(2)

This paper presents a matrix structural analysis of variable stiffness on the complete loading history of prestressed concrete grids with unbonded tendons. A model of torsional rigidity affected by moment is derived by the analogy of space truss, and the effect of torque on flexural rigidity is also studied. In order to calculate the increment of stresses in tendons, a corresponding equation is created. Comparison of calculation shows well agreement with the experimental results.  相似文献   

THE ARC-LENGTH METHOD OF SECANT RIGIDITY IN FRAME ANALYSIS     

Wang Yongyue 《保鲜与加工》1996,(1):27-31

The secant rigidity is used for the are-length method to solve the nonlinear finite elements problems. The advantage of this method is unnecessary of calculating the initial resistance term caused by the incremental step. The computational work is less and the programing is easier as compared with initial are-length method. This method can be widely used to solve nonlinear problems.  相似文献   

Study on Synthesis of High Quality Lactide     

Wang Yuanliang  Zhao Jianhua 《保鲜与加工》1996,(1):112-117

Polylactide,a biodegradable polymer, is an important biomedical meaterial. The synthesis of lactide from lactic acid is the key dimer of polylactide,unevitably affacting the polymerized process and the quality. Present work improves synthesis process of lactide. The synthesized factors are discussed, the reactive time is shortened and the quality of resultant is also raised.  相似文献   

A New Adaptive Sequential Diagnosis Algorithm in the PMC Model     

Wang Xueqin  Zhou Liuding  Yang Xiaofan 《保鲜与加工》1996,(3):61-66

We present an adaptive algorithm for sequential diagnosis in the PMC model,which can directly identify a faulty processor without first identifying a fault-free processor.  相似文献   

Studies on the Oxidation of Weathered Coal with Nitric Acid     

Liang Renjie  Yao Shusen  Zhang Shilin  Hu Daiying  Wang Nanmu 《保鲜与加工》1996,(3):79-83

A raseach has been done on the possibility of producing nitriochumic acid fromweathered coal of Nantong,Sichuan,oxidised by nithic acid.The optimun reacting conditions,whichare found through the way of orthogonal experiment,are suggested as follows:concentration ofHON3 35%,rate of HON3 to coal 3.5,reacting take 15 min,and reaction temperature 369 K. Thecomposition of product is Wf 2. 91 %;Ag 14.06%;HAg 78.28%;Ng 1.62%.  相似文献   

The Inherent Fault Tolerance of Multi-Layer Neural Networks     

YangXiaofan  Chen Tinghuai  Wang Xueqin 《保鲜与加工》1995,(3):69-75

The inherent fault tolerance of multilayer neural networks (MLNs) is due to thedistributed properties of information processing and information storage in an MLN , and the inher-ent fault-masking capability of every neuron. Also,the concept of inherent fault tolerance of MLNsis formalized, Finally, perceptrons and three-layer nets are shown inherently fault tolerant underreasonable statistical conditions,respectively.  相似文献   

A General Model and Its Algorithmson the Scheduling Problems of the Parallel Processors     

Huang Decai  Xu Zongjun Yang Dan  Hu Lide  Wang Shilong 《保鲜与加工》1994,(1):46-51

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Fire resistance performance on restrained high strength Q460 steel beams   总被引：2，自引：0，他引：2  

He Pingzhao  Wang Weiyong 《保鲜与加工》2015,(2):52-59

为了研究约束高强度Q460钢梁的抗火性能,在已有约束钢梁分析理论的基础上,引入残余应力,提出了约束钢梁的抗火性能分析方法,并采用普通强度约束钢梁试验数据对分析方法进行了验证。考虑高强度Q460钢材高温下力学性能参数,利用所提出的方法分析了约束高强度Q460钢梁的抗火性能,并与普通强度Q345钢梁进行了对比。对影响约束高强度Q460钢梁的抗火性能参数进行了分析,包括荷载比、残余应力、轴向约束刚度、转动约束刚度和受火方式等。研究表明：所提出的分析方法准确可靠,高强度Q460钢梁抗火性能与普通强度钢梁具有较大的区别,高强度Q460约束钢梁的抗火性能明显优于普通强度约束钢梁。荷载比、轴向约束刚度、转动约束刚度、受火方式对高强度Q460约束钢梁有较大影响。  相似文献