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According to the surrounding rock stability type determined through fuzzy comprehensive evaluation, bolt and cable support parameters for thick soft coal roadway were selected based on the engineering analogy method. Considering two conditions that the roadway was arranged along the roof and along the floor, the activity law of the roadway surrounding rock was simulated through Fast Lagrangian Analysis...
In order to avoid the surface sink marks on the automobile dashboard decorative covers, the combined effects of multi-molding process parameters are analyzed by the combination of orthogonal experiments and Moldflow simulation tests. By this method, it can gain the experiment data which can reflect the overall situation using fewer number of simulation test. Furthermore, the effects degree of different...
Starting at analyzing the characteristics of vulnerable ecological system, this paper selected 3 landscape indexes of FI, FD and FN, and 1 eco-environment index of erosion to make up the eco-environment sensitive factors, and chose the ecological suitability as automatic recovery ability. Thus it built up an Eco-Environment Vulnerability Assessment Model to evaluate the effects of Returning Farmland...
Culture force is one of three-main important environment force for construction enterprises'value innovation. Based on literature review among the culture, culture force and enterprise culture force, the paper argues that culture governance is the highest state for construction enterprises to improve construction enterprises value innovation ability. Then, culture force system is divided into four...
The risk analysis of highway traffic safety is a uncertainty system problem. Based on the theory of set pair analysis, stochastic simulation of triangular fuzzy numbers, herein a risk analysis model for the highway traffic safety was discussed. A concept of multi-element connection number of the set pair, which was consisted of evaluation index sets and classification standard sets of the highway...
On the basis of establishing evaluation index system of efficiency of Informal Innovation Network (IIN), this paper presents the comprehensive evaluation means that regards Data Envelopment Analysis (DEA) as the central model and the entropy method as the assisted model, and empirically analyzes IIN efficiency of ten IT enterprises. The evaluation measures are beneficial to managing the knowledge...
In order to investigate the effects of different curing temperatures on the flexural performance of engineered cementitious composites (ECC), the four-point bending test is employed in this paper. Four curing temperatures are applied to the ECC specimens, which are 20°C, 40°C, 60°C and 80°C, respectively. The experimental result indicates that the deflection of ECCs at early age decreases gradually...
This paper confirms the support relationships between executive power and management capability in China construction enterprises. Enterprises' executive is listed as one of three inherent growth forces. Based on the literatures analysis of executive power, construction enterprise executive power has been defined, at the same time, integrating the surface support and hidden lyaler uphold effect to...
In view of the adverse engineering characteristics of saline soil such as collapsibility, salt expansion and corrosion, cement, cement-lime and KD curing agent have been respectively used to modify the saline soil in the coastal areas for engineering application. Unconfined compressive strength test of the modified soil has been conducted to analyze the reasons why the two previous modified materials...
Rigid-frame tied-arch bridges have become one of widely-used bridges due to the good performances. However, the research on its seismic performance, especially on the seismic response of its structure under strong after-shock, is not sufficient. The strong after-shock time-history which obtained through statistical laws was used as input earthquake motion in the paper. The structure-damaging index...
This thesis has developed the application program of bridge risk management system with the B/S structure to realize the processes of the risk identifying for the engineering issues, risk assessment and risk decision-making with computer language. It can analyze the risk elements at each working stages of a bridge in detail so that the risk manager can take the targeted strategies of risk controlling...
How to analyze the problems in construction engineering projects efficiently is an important research task in construction project management. In order to put forward an efficient method, first, how to obtain the characteristics of problem phenomena and their parameters are analyzed on the guidance of rough set, and a new model to obtain the parameters of problem phenomena is set up. Then, how to...
Research on the microscopic material properties of recycled asphalt shingles (RAS) with the aggregate imaging system (AIMS) are firstly introduced in the paper. As a rapid, effective analysis tool, the angularity and 2D form for the recycled asphalt shingles can be evaluated with AIMS. The testing illustrated that about one-third elongated, sharp angular aggregates of the roofing shingles are evenly...
The wear resistance of concrete is helpful to endure the skidding of concrete pavement in an acceptable length of time. In order to produce the concrete with wear resistance in advance, the orthogonal experiment was design take into account water-cement ratio, the cement content, the maximum particle-size of aggregate, sand ratio. The experiment of compressive strength, flexural strength, slump, wear...
Live-work is a significant form of mixed-use habitation in Southeast China, and in distributed periods it had related paradigms. With the comparison of western and Chinese practice, this thesis explains the essential motivations influencing the process of mixed-use development, and based on analysis and evaluation on main archetypes, regional mixed-use dimensions are given to work-live paradigms....
Average strain of cell of certain length can be measured by long-gauge Fiber Bragg Grating sensors. This article, taking average flexural rigidity of cell EI̅ based on average strain of cell and wide average height of neutral axis of cell Z̅ as damage identification parameters, validates via multiple damage numerical simulation of I-shaped cantilever steel beams and simple-supported steel beams, and...
In order to reflect the quality of construction projects, this paper constructed the evaluation index system of construction quality and designed BP network model based on neural network theory. Then in the MATLAB environment, an instance of the model was simulated, the results are consistent with the results of expert evaluation, and show that the method can make the quality evaluation of construction...
Based on logarithmic mean Divisia index method I and II, the factors impacting the changes of Chinese industrial SO2 emission intensity are decomposed into SO2 production intensity effect, government control effect (policy effect) and industrial structural effect. Using data of 1998 to 2006, result shows that the main driver behind the reduction of SO2 emission intensity is SO2 production intensity,...
This paper researched the investment decision-making at the earlier stage of the environment protection construction project and introduced three methods which could be helpful to the management of investment decision-making of these kinds of projects. The first method is to improve the scientificalness of the decision-making procedure. The second method is to improve the application of the system...
Taking Landsat5/TM images of 1988, 1997 and 2005, this paper used RS and GIS to analyze the changes of ecological environment effects of land use/cover change (LUCC) during the recent 17 years of the study area. The results indicate that: swamp land shows obvious decreasing trend and decreases 1674km2; dry land and paddy land shows strong increasing trend and increase 377km2 and 1338km2 separately...
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