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Online since: June 2012
Authors: Hao Luo, Zong Xiang Huang
Type Representative model Annual output/10,000 sets rolling element used Model Quantity /grain 1 Small and medium size deep groove ball bearing 6305 300 3/8 inch friction ball 7 2 Large and medium size deep groove ball bearing 6314 100 1 inch friction ball 8 3 Tapered roller bearing 32312 120 15.7×32.5 15 4 spherical-roller bearing 21312CC 50 15×13 24 Table 2 Operating units No.
Because that when number of operating units equals to N, the total number of pairs of operating units can be calculated by use of the following formula: (2) In this case, N=13, then the total number of pairs of operating units P=13(13-1)/2=78.
When the number of operating units is relative large, number of correlations among operating units will also be large, which is difficult to deal with, so it adopts comprehensive adjacence degree to handle this problem.
Online since: June 2010
Authors: Qing Yuan Zhou, Jian Jian Luo, Qing Chao Liu
Number: 08AJY003.
Typically, the famous American sociologist , modernization issue research experts alex inkeles' in the late 1960s around social and economical aspects of modern society forward ten indexes and the index of the standard is : per capita GNP is more than $3,000 , Agricultural output value of GDP ratio below 12 % , Services output value of the proportion of GDP more than 45% , The proportion of labor force non-agriculture is more than 70% , More than 80% of the population proportion of literacy , In proportion as young students school-age 10-15% , Every doctor service in the number of people under 1000 people, The average life expectancy is more than 70 years old, Infant natural mortality rates below 3% , The proportion of urban population is more than 50%, the natural growth rate of people below 1%.
Table 1 the evaluation index system first-order indexes secondary indexes standard value social and economic development level (A) Personnel per capita electricity consumption in the primary industry (A1) 1500 The non-agricultural population proportion (A2) 5 The specific gravity of Industrial added value in GDP (A3) 2 The agricultural investment level(B) The cultivatedareas per hectare of mechanical total power (B1) 15 The proportion in effective irrigated area(B2) 90 Penetration rate of three stations in rural areas (B3) 90 The proportion of serve jobholder in total employees (B4) 5 The comprehensive output level of agricultural (C) The sown area of grain yield (C1) 5000 Each rural agricultural Labour force create gross output value of agricultural(C2) 10000 Per capita meat production (C3) 200 The commodity rate of agricultural and sideline products (C4) 90 The living standards of famers(D) Rural per
Here, if some index of actual value or critical value is o or negative number, we should make it adding a proper number, so that it can be change into positive number, it can be dimensionless process.
In this paper we let each number add 1 and then go on dimensionless process. 4.3Calculating the weight of each index.
Online since: November 2012
Authors: Hong Xia Yang, Zheng Rong Zhao
Introduction Loess is mostly formed in arid or semi-arid climatic conditions, due to the dry climate and soil moisture evaporate constantly,the water contained salts such as calcium carbonate and calcium sulfate separated out and precipitated in the soil grain surface, then formed cementation.
Table 3 shows that after dynamic compaction, in area A, the dry density increased by 4%-19%, reaching more than 1.6g/cm3.Void ratio decreased by 7.6%-31.8%, reaching the range of general cohesive soil indicators.Standard penetration number was more than seven hits and the allowable bearing capacity of the foundation increased to 200kPa-230kPa.
Standard penetration number was more than eight hits and the allowable bearing capacity of foundation increased to 210 kPa-250kPa.In area C, dry density increased by 5.5%-13.2% and void ratio reduced by 6%-11.48%.Standard penetration number was more than ten hits and the allowable bearing capacity of foundation higher than 300kPa.The collapsible coefficient of all the test areas are less than 0.005 and the loess collapsibility disappeared, reaching a processing purpose.
compaction area Drilling depth (m) Dry density (g/cm3) Void ratio Standard penetration number (hits) Allowable bearing capacity (kPa) Collapsible coefficient Before A 3.75 1.50 0.815 6 160 0.042 B 5.70 1.53 0.787 8 180 0.031 C 8.75 1.56 0.757 16 210 0.041 After A 4.00 1.61 0.715 8 220 0.004 B 6.90 1.62 0.701 10 240 0.002 C 8.75 1.69 0.677 17 320 0.003 Construction Quality Control of Dynamic Compaction The Key Problems in the Process of Construction
The construction of less higher steps can refer to the above requirements. (5)When the original ground surface is wet or large moisture content, put 10cm to 20cm thick stone ballast or gravel before tamping in the sections, then compacting and keep filling up. (6)Winter construction, if frozen soil thickness is less than 0.5m,increase 2 to 3 strike in the original tamping number, when frozen soil thickness is bigger than 0.5m,stop construction.
Online since: July 2014
Authors: Jenn Dong Sun, Chun Jung Chen, Tai Ning Yang, Chang Lung Tsai
In this paper, a subcircuit calculation (whose number is used to measure the computation efforts) means the computation of solving (3) for y(tn+1) (tn+1 is current time point), which include applying integral formula (such as Trapezoidal method) to (3), and solving the derived nonlinear algebraic equations by Newton’s iteration.
We note that CSM is a very coarse-grained strategy for parallel circuit simulation.
The jth client computer just uses port number pn(j) (which is equal to 1000+j in our implementation) as the port number.
The number of cores is specified manually, depending on the number of disjoint portions or test effects.
Numbers of outputs nodes are listed in Table 1, too.
Online since: March 2015
Authors: Si Ying Liu, Zhang Shi Xu, Wen Tao Qu
For example, Sichuan Gas Field has a content of H2S of 1%~13%(volume fraction), while it is 0.0003%~1.92% in Shanganning Gas Field, and that number could be as high as 90% in certain oil/gas wells.
Table 1 Chemical Composition % C Si Mn S P Ni Mo 0.21 0.29 0.75 0.016 0.021 1.71 0.27 Table 2 Metallurgical Structure Grain Size Metallurgical Structure Inclusion Grade 4 Tempered Sorbite & Ferrite A0.5B0.5D1.0 Table 3 Strength Grade Tensile Strength/MPa Yield Strength /MPa Elongation/% 651 485 26 The size of one piece of specimen is 25.42mm×3.12mm,and the amount is 36.
Specimen are numbered by three digits before the experiment, instructions of the numbers are shown below: 1(6%H2S) 2(20Ni2Mo) 2(10%H2S) Serial Number 3(20%H2S) Procedures of the treatments of the specimen before the experiment: (1)Polished by 200#, 400# and 600# sandpaper in sequence; (2)Rinsed by water; (3)Acetone degreasing treatment; (4)Weighed and measured the dimensional parameters of the specimen; (5)Placed in drier waiting to be used in the experiment.
Table 4 Part of results of the experiment(under the temperature of 100℃) Serial Number Original mass of specimen m0 /g Mass of specimen after corrosion m /g (m0-m)/g Corrosion rate v/mm·a-1 Average corrosion rate v/mm·a-1 211 11.6405 11.6160 0.0245 0.30706 212 11.5955 11.5738 0.0217 0.27197 0.28952 213 11.5568 -- -- 221 11.5802 11.5547 0.0255 0.31959 222 11.4293 11.4057 0.0236 0.29578 0.30769 223 11.6512 -- -- 231 11.5597 11.5357 0.024 0.30079 232 11.5823 11.5558 0.0265 0.33212 0.31646 233 11.5225 -- 0.30706 Table 5 Part of results of the experiment(under the temperature of 25℃) Serial Number Original mass of specimen m0 /g Mass of specimen after corrosion m0 /g (m0-m)/g Corrosion rate v/mm·a-1 Average corrosion v /mm·a-1 211 11.5593 11.5458 0.0135 0.1692 212 11.4563 -- -- 0.16857 213 11.4913 11.4779 0.0134 0.16794 221 11.4288 11.4080 0.0208 0.26069 222 11.4578 11.4376 0.0202 0.25317 0.25693 223 11.4881 -- -- 231 11.4555 11.4243 0.0312 0.39103 232 11.5441 11.5131
Online since: January 2012
Authors: Bernhard Sonderegger, Ernst Kozeschnik, Christof Sommitsch
Basically, a high number of precipitates block dislocation movements and thus hinder plastic deformation, which increases hardness, strength and creep resistance.
In recent years, precipitation kinetic simulations for heat treatments and thermal loading have been carried out successfully on an increasing number of complex materials [3-8].
Input parameters for these calculations are, among others, composition, time-temperature history, grain sizes, dislocations densities and thermodynamic- and diffusion databases.
The results, phase fractions, number densities and particle radii are the ideal input parameter for computing λ.
One finds as final weighted normal distance of cases I and II: (11) With ni, the number of particles per unit area in the glide plane can be calculated immediately.
Online since: October 2020
Authors: Marion Merklein, Andreas Jobst
Forming at room temperature leads to an advantageous grain structure and work hardening of the material, resulting in components with favorable operating characteristics.
The produced parts show a high durability due to an advantageous grain structure and work hardening during forming [2].
Acknowledgement The research activities are funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) within the scope of the priority program SPP2013 - Targeted Use of Forming Induced Residual Stresses in Metal Components in the subproject P10 (project number: 374688875).
Online since: June 2010
Authors: Ye Zhang, Zhan Lin Yu
From the 1970s, psychologists put forward a number of non-geometric similar models, in which the similarity models, proposed by Tversky's model in 1977 [6], has been widely concerned and applied in the fields of cognitive psychology and artificial intelligence.
For A, B is defined as the ontology onto the entities; the concept of ontology similarity algorithm should have the following three features: Features 1: similarity of the results of the calculation should be a continuous change in the value of a more fine-grained to reflect the degree of similarity of the concept of money.
(6) TC is the number of correct classified texts, FC is the number of wrong classified texts and MC is the number of texts which supposed to classify the category but did not.
MC is the number of texts which is not supposed to classify the category and also did not.
Online since: July 2014
Authors: Xue Yong Xu, Sheng Jie Di, Zhi Gang Shan
The affecting factors mainly include the physical and mechanical properties of foundation soils, such as standard penetration test (SPT) number N, side friction fs of CPT, cone tip resistance qc of CPT, depth z, void ratio e, compression modulus Es, water content w, density ρ, specific gravity of soil grain Gs and type of soils T.
The minimum error corresponding to spread of GRNN is the final network selected value, which is shown as follows: (3) where spread is the undetermined parameter of the GRNN, n is number of samples, e is corresponding error, Xi is input sample and Yi is the corresponding output sample of each input sample.
The cohesive soils are represented by the number 1, and non-cohesive soils by the number 0.
For example, when the input number of soil type is 0, the trained GRNN can identify automatically the characteristics of non-cohesive soils and seek the corresponding shear wave velocity.
Online since: August 2013
Authors: Hui Yu Wang, Yan Kai Wu, Xian Song Sang
To solve this problem, we can use the wave speed with fixed depth, because the same depth has a consistent stress state, especially for the ground conditions with same padding. 2 Testing results analysis method Data interpretation processing system of SASW mainly consists of four functional modules, each module includes a number of subroutines, each subroutine also includes a number of the next level subroutines.
Module 4: the results of geological interpretation and finalization of the underground medium. 3 SASW method judged land filling compaction quality standard Generally speaking, the soil hardness and bearing capacity can to be determined by the standard penetration number N63.5 and shear wave velocity Vs.
At the same time, the researching results show at home and abroad existing that, there is a close relationship between the shear wave velocity of foundation soil with Standard Penetration Number N63.5 , although different researchers have different formula, but basically similar.
By traditional standard penetration number to the reinforcement effect . 4 Project example A highway local road, the total length is 2634 meters.
References: [1] Jie Liu Application of Rayleigh Wave Survey for Soft Subgrade Treatment of the Aircraft Park in Zhuhai Exhibition Sold Engineering and Foundation, 2000 Vol.14 No.1 39-43 [2] Liyuan Tong, Chen Zhengzhou, Fang Lei etc Application of transient Rayleigh Wave Method for Engineering Inspection Hydrogeology And Engineering Geology 1999, 6, 52-56 [3] Kechao Huang, Zhang Yonghui Research on Compactness Method of Coarse Grained Soil Roadbed Examined by Rayleigh Wave Highway 2004 No.4 116-120 [4] Jinhua Wang Rayleigh Wave Testing Technique and It’s Application Sold Engineering and Foundation 2006 Vol.20 No.4 98-100
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