Precision blasting， current status and its prospective

Precision blasting, which is different from traditional control blasting, is regarded as the sign of new development stage of engineering blasting. The definition, connotation, technology system and current situa- tion of its application and development were described briefly. With regard to the prospect of precision blasting, following aspects for further study are recommended ： a. A multiple disciplinary study should be developed for a more understanding on the explosive energy release and quantitative blasting design; b. according to the require- ments of digital blasting objective, syncretic study of precision blasting and technology should be enhanced; c. numerical simulation was an important tool for optimizing engineering blasting scheme and blasting harmful effects control, a more elaborate precision numerical simulation method should be studied furthermore; d. the modernization and standardization of precision blasting construction should be enhanced.     

Review and Prospect of the Shuttleless Loom Development

In this paper, a review of the shuttleless looms' development shows that three types of shuttleless looms: rapier, Jet and gripper projectile, are now equally matchable with each other. A prospect of the shuttleless loom's development is also dealt with. It can be predicted that both rapier and Jet looms will be developed further and the future development of a new type of modern weaving looms will be prosperous in the coming 21st century.     

Application of Computer Integration Technology for Fire Safety Analysis

With the development of information technology, the fire safety assessment of whole structure or region based on the computer simulation has become a hot topic. However, traditionally, the concerned studies are performed separately for different objectives and difficult to perform an overall evaluation. A new multi-dimensional integration model and methodology for fire safety assessment were presented and two newly developed integrated systems were introduced to demonstrate the function of integration simulation technology in this paper. The first one is the analysis on the fire-resistant behaviors of whole structure under real fire loads. The second one is the study on fire evaluation and emergency rescue of campus based on geography information technology (GIS). Some practical examples are presented to illuminate the advantages of computer integration technology on fire safety assessment and emphasize some problems in the simulation. The results show that the multi-dimensional integration model offers a new way and platform for the integrating fire safety assessment of whole structure or region, and the integrated software developed is the useful engineering tools for cost-saving and safe design.     

Multidimensional CAE methods for car body structure optimization

The computer aided engineering(CAE) analysis technique has become one of the most important means in modern automobile development due to its remarkably computing capability.With the development of CAE bussiness software and intensive research on automotive development process,the CAE technique,which was only used as an auxiliary validation tool in the later product development in the past,is gradually used in each stage of product development now.Furthermore,accurate and fast analysis data can be supplied effectively.Especially in current CAE application, based on some optimization technologies such as sensitivity,feature and topology,the parametric design gradually enables a CAE engineer to be free from the condition which a convention analysis usually lags behind a design,and makes it be parallel to or even anterior to the design.Under the circumstance,the CAE resources can be maximized in each project development department,thereby promoting the project progress and quality,and creating a new philosophy of "analysis-driven design".     

The development of real time data driving multi-axis linkage and synergic movement control system of 3D variable cross-section roll forming machine

The three dimensional variable cross-section roll forming is a kind of new metal forming technol- ogy which combines large forming force, multi-axis linkage movement and space synergic movement, and the sequential synergic movement of the ganged roller group is used to complete the metal sheet forming according to the shape of the complicated and variable forming part data. The control system should meet the demands of quick response to the test requirements of the product part. A new kind of real time data driving multi-axis linkage and synergic movement control strategy of 3D roll forming is put forward in the paper. In the new control strategy, the forming data are automatically generated according to the shape of the parts, and the multi-axis linkage movement together with cooperative motion among the six stands of the 3D roll forming machine is driven by the real-time information, and the control nodes are also driven by the forming data. The new control strategy is applied to a 48 axis 3D roll forming machine developed by our research center, and the control servo period is less than 10ms. A forming experiment of variable cross section part is carried out, and the forming preci- sion is better than ＋ 0.5mm by the control strategy. The result of the experiment proves that the control strategy has significant potentiality for the development of 3D roll forming production line with large scale, multi-axis ganged and svner~ic movement     

Application of CAE technology for Geely car lightweight

In order to reduce energy consumption and protect the human survival environment,the lightweight has became the development trend of the world automobile industry.On the premise of ensuring the strength,safety and driving performance of the car,the major car enterprises try to reduce the curb weight of the car,fuel consumption and emissions.Not only a lot of new technologies and new products have been generated,but also joint vehicle development process and computer aided engineering(CAE) analysis technology have been developed.Since the entry into the "Automobile Lightweight Technology Innovation Strategic Alliance" in Dec.2007,Geely Group has been focusing on lightw eight construction of vehicle and key assemblies in every stage of the vehicle product development.Among vehicles appeared on the market and in research,it has presented continuously better performance.The paper describes application examples and successful experience of CAE simulation analysis and performance optimization during the lightweight design and development of a self-developed model of Geely,and looks forward to the prospects for the development of lightweight of Geely vehicle.     

Integration of chemical product development, process design and operation based on a kilo-plant

Presented in this paper is an integrated approach of computer-aided product development, process design and operation analysis based on a kilo-plant. The implemented kilo-plant, as a research platform to manufacture product in kilogram-scale, was designed especially for fine and specialty chemicals. The characteristics of product synthesis, process operation and product quality control are investigated coupled with computer-aided monitoring, online modeling, simulation and operation process optimization. In this way, chemical product discovery, process design and operation are integrated in a systematic approach, in the aim to respond to rapid changing marketplace demands to new products.     

Multi Model Technology and Its Application in the Integration of CAD/CAM/CAE

The globalization and the intensive competition of th e automotive market require shortening the product development cycle, improving the quality and reducing the cost. Optimizing the product development process, b uilding product‘s consistent defining model for life cycle, and realizing the in tegration of CAD/CAM/CAE and Concurrent Engineering (CE) become the means to acc ept the challenge. A new product modeling technology, Multi Model Technology (MM T), is provided in this paper to meet the needs of t...     

Product model structure for generalized optimal design

The framework of the generalized optimization product model with the core of network- and tree-hierarchical structure is advanced to improve the characteristics of the generalized optimal design. Based on the proposed node-repetition technique, a network-hierarchical structure is united with the tree-hierarchical structure to facilitate the modeling of serialization and combination products. The criteria for product decomposition are investigated. Seven tree nodes are defined for the construction of a general product model, and their modeling properties are studied in detail. The developed product modeling system is applied and examined successfully in the modeling practice of the generalized optimal design for a hydraulic excavator.     

A New Process Study on Comprehensive Utilization of NOx from Nitric Acid Plant

Based on studies of controlling NOx from nitric acid exhaust gas domestic and abroad, this paper has developed a new technique on removal of NOx and production of a by-product with high added value MnO2. Experiment shows, pyrolusite, whose valid composition is MnO2, of absorbing NOx has the following characteristics: quick, low cost, no secondary pollutant. Moreover, exhaust gas can attain the required standards. If the temperature of the pyrolusite serum is 30℃, pH=4, containing 90 g/L MnO2, the absorptivity for 3 000 mg/m^3 NOx is 89.2%. Furthermore,few of the impurities in pyrolusite dissolve in the absorption mother solution. The purification cost of product is very low.The purity of end product MnO2 is more than 99. 995% after purifying. Therefore, it is workable for the new technique on economy and technology. There are also obvious environmental benefits and marked economic returns.     

Characteristic parameters and operational curves of g-Al_2O_3 nanofiltration membranes

Inorganic nanofiltration (NF) membrane is a kind of new type separation membrane that has been developed on the basis of polymeric NF membrane. Inorganic NF membranes have a number of advantages as comparedwith polymeric NF membranes. They offer a highermechanical strength, are very resistant to organic solvent and can be used in a rather wide pH and temperaturerange. But, the study on the characteristic parameters and operational curves of them is very insufficient heretoforebecause the p…     

Testing Structure for Detection of Poly Stringer Defects in CMOS ICs

A testing structure was developed to more effectively detect the poly stringer defects in contemporary CMOS ICs. This structure is much more sensitive to poly stringer defects and is closer to the real product layout than the currently widely used structure using an active dummy underneath a poly comb. Many testing structure pieces manufactured in a 0.11 μm copper process line were used to compare the current design with the conventional testing structure. The data shows that the new structure more efficiently detects poly stringers. The results also show that the poly stringers are related to the shallow trench isolation (STI) width. This structure can be used to identify new designs for manufacturing rules for the active space. Thus, this method is very useful for IC foundries to detect poly stringers and to characterize the processing line capability and tune the process recipe to improve product yields.     

An inexact multi-objective programming approach for strategic environmental assessment on regional development plan

This paper presents the development of an inexact multi-objective programming (IMOP) model and its application to the strategic environmental assessment (SEA) for the regional development plan for the Hunnan New Zone (HNZ) in Shenyang City, China. Inexact programming and multi-objective programming methods are employed to effectively account for extensive uncertainties in the study system and to reflect various interests from different stakeholders, respectively. In the case study, balancing-economy-and-environment scenario and focusing-industry-development scenario are analyzed by the interactive solution process for addressing the preferences from local authorities and compromises among different objectives. Through interpreting the model solutions under both scenarios, analysis of industrial structure, waste water treatment plant(WWTP) expansion, water consumption and pollution generation and treatment are undertaken for providing a solid base to justify and evaluate the HNZ regional development plan. The study results show that the developed IMOP-SEA framework is feasible and applicable in carrying comprehensive environmental impact assessments for development plan in a more effective and efficient manner.     

Improved Polyurethane-coated Orthopedic Casting Bandage for Medical Application

A new improved polyester casting bandage, which comprises a knitted polyester substrate coated with polyurethane prepolytner, was developed. The appropriate polyester knitted substrate was selected firstly; the optimal ingredient for the synthesis of coating resin (polyurethane prepolymer) was determined then through a series of trial experiments and factorial experiments; the properties of bandage were checked at last. The results of the experiment indicate that most of the properties of the new product could exceed or approximate to the level of similar product of other countries.     

A New Thread Guide Mechanism of Rubbed Roving Frame

A new thread guide mechanism of a rubbed roving frame is developed, which consists mainly of a plate cam, a linkage and an air bag spring. Characteristics and design parameters of the air spring are explored in this study. Based on analyses of winding technology for this kind of package, the kinetic laws of the thread guide is put forward. General design equations of the cam profile are derived, and common kinetic laws of II linkage group which is used for such mechanism design is proposed. It proves theoretically that it is practicable. The experimental results indicate that it can meet the needs of technological demands, and the new thread guide mechanism has been used successfully on textile machines.     

Cooling hot rolling steel strip using combined tactics

The coiling temperature control of a typical steel strip mill was investigated. Due to the high speed of a strip and complex circumstance, it is very hard to set up a cooling model with high accuracy. A simplified dynamic model was proposed, based on which a cooling control scheme with combined feedforward, feedback and adaptive algorithms was developed. Meanwhile, the genetic algorithms were used for the optimization of model parameters. Simulations with a model validated using actual plant data were conducted, and the results have confirmed the effectiveness of the proposed control methods. At last, a simulation system for coiling temperature control was developed. It can be used for new product trials and newcomer training.     

Application of Grey Associative Analysis to the Assessment of Regional Water Security

The assessment of water security is an important content in the security management of water resources due to the fact that the state of water security directly affects both the sustainable development of regional economy and the improvement on the living quality of mankind．Grey associative analysis is introduced and applied to assessment of water security on the basis of grey characteristics of the assessment index system of water security．As a case study shows,grey associative analysis is used for evaluating water security of some provinces in China,and the satisfactory assessment results are obtained．The sequence of provinces in China with regard to water security from good to poor is obtained and,moreover,the water security level of each region is also confirmed．The results obtained accord with the actual state of each region．They are of practical significance and can be used to guide the management of regional water security and a sustainable development of the economy therein．At the same time,the results demonstrate that grey associative analysis provides a new method for assessing water security quantitatively but needs a further study．     

Development of Full Automatic External Welding Machine for Annular Welds of Pipeline

To meet the demands of rapid development of pipeline constructions in China, a complete set of full automatic external welding machine for annular welds of pipeline and welding procedure have been developed thereof. The system has been applied in the “West-East Pipeline Project” and its performance is proven. With this welding machine the welding parameters can be either preset before or adjusted in real time during the welding process, which avoids the blemishes of same type domestic and international products. Thus it is best propitious to in-situ construction conditions and workers‘ technical level in China. In this article the development of mechanical and control systems of this product is introduced and typical welding procedure parameters are provided.     

A Benefit Measurement Framework for an Online Contract Change Management System

The contract change management (CCM) system is an online collaboration tool, which supports the contract change management process of new engineering contract (NEC) contract. It is currently used in practice on a wide range of civil, power, and building projects in the UK. The aim of this study is first to identify the tangible and intangible benefits of the system through a user survey; then to develop a framework to measure these benefits. A questionnaire survey is conducted, which reveals that CCM can help project teams improve process effectiveness, reduce risk of process failures, and increase the compliance with NEC requirements. Subsequently, a spreadsheet tool is developed to allow CCM users to calculate the tangible cost savings as a result of using the system. For intangible benefits, a change management maturity model (CM3) is developed, which provides a measurement framework for assessing the improvement of a project team’s capability in dealing with contract changes.