Search scope:
排序： Display mode:
Research on the railway construction process quality model based on the state-space method
Lu Shoudong,Zhou Guohua,Chen Haifeng and Zhao Guotang
Strategic Study of CAE 2014, Volume 16, Issue 3, Pages 64-69
In the ISO9000“input- output”process model，the concept of process quality is difficult to get the correct interpretation. From the point of view of the process's“white box” theory，this paper puts forward the scientific meaning of the concept of process quality and the process quality model by taking the basic operating unit of6M1E in the railway construction project for example. The basic operating unit system consists of the technological natural process，operation process and management process；the process quality of the basic operating unit system depends on the interrelation and interaction among those three sub- processes，and also subject to the impact of the external disturbance input factors. Finally，the cast- in- situ prestressed concrete continuous box girder construction process is utilized to elaborate the specific application of this theory in the quality management of the railway construction project.
Keywords： railway construction project “white box”model state transition equation process quality
The demonstration,decision process and practice of Three Gorges Project
Pan Jiazheng
Strategic Study of CAE 2011, Volume 13, Issue 7, Pages 4-8
The world-famous Three Gorges Project (TGP) is the largest hydropower station in the world and also the largest water resources and hydropower project constructed in China. The impoundment of Three Gorges Reservoir reached the design water level of 175 m for the first time on October 26, 2010, which marked that the various functions such as flood control, power generation and navigation of TGP can meet the design requirements. It took nearly 100 years from conception, demonstration, design, construction and operation to final completion of TGP. How was the conception of TGP proposed? What a role it should be? What are different opinions existed? How was the project demonstrated? What was the conclusion of demonstration? Those are the issues that many people care about but do not quite understand. A compendious introduction is made in memory of the achievement of the century dream.
Keywords： Three Gorges Project demonstration and decision process
Dynamic Visual Simulation for Concrete Dam Construction Process of the Xiangjiaba Hydro Station
Shen Mingliang,Chen Lihua,Chen Wei,Sheng Lemin,Su Junan
Strategic Study of CAE 2004, Volume 6, Issue 6, Pages 68-73
In view of simulation for concrete dam construction process of the Xiangjiaba Hydro Station, the paper systemically analyses the relation and condition among various main factors during concrete dam construction process. An integration plan, with tower belts and cable cranes as the main equipment and the gantry cranes, belt conveyers as the supplementary equipment, has been adopted for Xiangjiaba construction. By using algorithmic procedure of choosing block from separate bin, simulation result for concrete dam construction is made in the form of three-dimension visual simulation. Furthermore, the authors haveresolved key questions of optimizing execution program of work, matching construction machine and equipment and verification of dam construction schedule.
Keywords： Xiangjiaba Hydro Station construction simulation concrete construction comparison of drafts
Insurance ratemaking method for risk of construction diversion project
Chen Zhiding,Hu Zhigen
Strategic Study of CAE 2011, Volume 13, Issue 4, Pages 106-112
Based on analyzing risk factors of diversion project, synthetic risk rate and engineering insurance period, the frequency and distribution law of loss were researched on the grounds that foundation pit is submerged after diversion project ceases to be effective. And then, the standpoint that these total losses are subject to non homogeneous compound Poisson process is put forward. Furthermore, the collective risk model of the total losses about engineering insurance is established on the basis of construction diversion project risk. Ultimately, insurance ratemaking method for construction engineering risk and its mathematical expression is presented, which provides theoretical method for the insurance ratemaking of hydropower engineering to some extent.
Keywords： diversion risk engineering insurance insurance premium non-homogeneous compound Poisson process
A Perspective on Smart Process Manufacturing Research Challenges for Process Systems Engineers
Ian David Lockhart Bogle
Engineering 2017, Volume 3, Issue 2, Pages 161-165 doi: 10.1016/J.ENG.2017.02.003
The challenges posed by smart manufacturing for the process industries and for process systems engineering (PSE) researchers are discussed in this article. Much progress has been made in achieving plant- and site-wide optimization, but benchmarking would give greater confidence. Technical challenges confronting process systems engineers in developing enabling tools and techniques are discussed regarding flexibility and uncertainty, responsiveness and agility, robustness and security, the prediction of mixture properties and function, and new modeling and mathematics paradigms. Exploiting intelligence from big data to drive agility will require tackling new challenges, such as how to ensure the consistency and confidentiality of data through long and complex supply chains. Modeling challenges also exist, and involve ensuring that all key aspects are properly modeled, particularly where health, safety, and environmental concerns require accurate predictions of small but critical amounts at specific locations. Environmental concerns will require us to keep a closer track on all molecular species so that they are optimally used to create sustainable solutions. Disruptive business models may result, particularly from new personalized products, but that is difficult to predict.
Keywords： Smart manufacturing Process systems engineering Uncertainty Flexibility Optimization Model-based control
Intermolecular and Surface Interactions in Engineering Processes Review
Jiawen Zhang, Hongbo Zeng
Engineering 2021, Volume 7, Issue 1, Pages 63-83 doi: 10.1016/j.eng.2020.08.017
Interactions involving chemical reagents, solid particles, gas bubbles, liquid droplets, and solid surfaces in complex fluids play a vital role in many engineering processes, such as froth flotation, emulsion and foam formation, adsorption, and fouling and anti-fouling phenomena. These interactions at the molecular, nano-, and micro scale significantly influence and determine the macroscopic performance and efficiency of related engineering processes. Understanding the intermolecular and surface interactions in engineering processes is of both fundamental and practical importance, which not only improves production technologies, but also provides valuable insights into the development of new materials. In this review, the typical intermolecular and surface interactions involved in various engineering processes, including Derjaguin–Landau–Verwey–Overbeek (DLVO) interactions (i.e., van der Waals and electrical doublelayer interactions) and non-DLVO interactions, such as steric and hydrophobic interactions, are first introduced. Nanomechanical techniques such as atomic force microscopy and surface forces apparatus for quantifying the interaction forces of molecules and surfaces in complex fluids are briefly introduced. Our recent progress on characterizing the intermolecular and surface interactions in several engineering systems are reviewed, including mineral flotation, petroleum engineering, wastewater treatment, and energy storage materials. The correlation of these fundamental interaction mechanisms with practical applications in resolving engineering challenges and the perspectives of the research field have also been discussed.
Keywords： Intermolecular and surface interactions Colloids Emulsions Interface science Engineering processes Atomic force microscopy Surface forces apparatus
Membrane Crystallization for Process Intensification and Control: A Review Review
Xiaobin Jiang, Yushan Shao, Lei Sheng, Peiyu Li, Gaohong He
Engineering 2021, Volume 7, Issue 1, Pages 50-62 doi: 10.1016/j.eng.2020.06.024
Crystallization is a fundamental separation technology used for the production of particulate solids. Accurate nucleation and growth process control are vitally important but difficult. A novel controlling technology that can simultaneously intensify the overall crystallization process remains a significant challenge. Membrane crystallization (MCr), which has progressed significantly in recent years, is a hybrid technology platform with great potential to address this goal. This review illustrates the basic concepts of MCr and its promising applications for crystallization control and process intensification, including a state-of-the-art review of key MCr-utilized membrane materials, process control mechanisms, and optimization strategies based on diverse hybrid membranes and crystallization processes. Finally, efforts to promote MCr technology to industrial use, unexplored issues, and open questions to be addressed are outlined.
Keywords： Membrane crystallization Nucleation Process control Process intensification
Recent Developments in the Crystallization Process: Toward the Pharmaceutical Industry Review
Zhenguo Gao, Sohrab Rohani, Junbo Gong, Jingkang Wang
Engineering 2017, Volume 3, Issue 3, Pages 343-353 doi: 10.1016/J.ENG.2017.03.022
Crystallization is one of the oldest separation and purification unit operations, and has recently contributed to significant improvements in producing higher-value products with specific properties and in building efficient manufacturing processes. In this paper, we review recent developments in crystal engineering and crystallization process design and control in the pharmaceutical industry. We systematically summarize recent methods for understanding and developing new types of crystals such as co-crystals, polymorphs, and solvates, and include several milestones such as the launch of the first co-crystal drug, Entresto (Novartis), and the continuous manufacture of Orkambi (Vertex). Conventional batch and continuous processes, which are becoming increasingly mature, are being coupled with various control strategies and the recently developed crystallizers are thus adapting to the needs of the pharmaceutical industry. The development of crystallization process design and control has led to the appearance of several new and innovative crystallizer geometries for continuous operation and improved performance. This paper also reviews major recent progress in the area of process analytical technology.
Keywords： Crystallization Crystal engineering Polymorphism Crystallization process design and control Crystal size distribution
Chao Shang、 Fengqi You
Engineering 2019, Volume 5, Issue 6, Pages 1010-1016 doi: 10.1016/j.eng.2019.01.019
Safe, efficient, and sustainable operations and control are primary objectives in industrial manufacturing processes. State-of-the-art technologies heavily rely on human intervention, thereby showing apparent limitations in practice. The burgeoning era of big data is influencing the process industries tremendously, providing unprecedented opportunities to achieve smart manufacturing. This kind of manufacturing requires machines to not only be capable of relieving humans from intensive physical work, but also be effective in taking on intellectual labor and even producing innovations on their own. To attain this goal, data analytics and machine learning are indispensable. In this paper, we review recent advances in data analytics and machine learning applied to the monitoring, control, and optimization of industrial processes, paying particular attention to the interpretability and functionality of machine learning models. By analyzing the gap between practical requirements and the current research status, promising future research directions are identified.
Keywords： Big data Machine learning Smart manufacturing Process systems engineering
Research of Collaborative Design Process Management Based on Activity Method
Hao Yongping,Zhang Jianfu,Shi Chunjing,Shao Weiping
Strategic Study of CAE 2005, Volume 7, Issue 12, Pages 69-73
By analyzing the components of an activity and the relationship of the process modeling, a topological structure of the collaborative design process management system was presented. According to the situation and characteristic of the product development process, a number of the important issues about process modeling, AU design environment, process monitoring and the data exchange between systems were discussed. At last, a user interface of the collaborative design environment and the display of process monitoring are also given.
Keywords： activity theory activity unit process modeling design process management
Research on the Nearshore Process of the Typical Coast of the Bohai Bay
Yun Caixing
Strategic Study of CAE 2001, Volume 3, Issue 3, Pages 42-51
Since the coast of the Bohai Bay is a typical plain silty one, the problems about engineering sediments, such as fine sediment transportation and how to reduce silting amount for the port and waterway, have come across one after another in the construction of the Tianjin Port and the Huanghua Port of Hebei Province, the two largest artificial ports in China. On the basis of the data observed in situ in the coastal area of the Dakou River in the southwestern Bohai Bay, this paper analyzes comprehensively hydrodynamics, sediment trans-portation, sedimentation of the coastal beach and alluvial and silting evolution, which provide a theoretical basis for the strategic decision of “the shallow water used as the deep water” in the plain silty coast.
Keywords： the Bohai Bay nearshore process sediment transportation
Membrane Engineering for Green Process Engineering Review
Francesca Macedonio, Enrico Drioli
Engineering 2017, Volume 3, Issue 3, Pages 290-298 doi: 10.1016/J.ENG.2017.03.026
Green process engineering, which is based on the principles of the process intensi?cation strategy, can provide an important contribution toward achieving industrial sustainable development. Green process engineering refers to innovative equipment and process methods that are expected to bring about substantial improvements in chemical and any other manufacturing and processing aspects. It includes decreasing production costs, equipment size, energy consumption, and waste generation, and improving remote control, information fuxes, and process fexibility. Membrane-based technology assists in the pursuit of these principles, and the potential of membrane operations has been widely recognized in the last few years. This work starts by presenting an overview of the membrane operations that are utilized in water treatment and in the production of energy and raw materials. Next, it describes the potential advantages of innovative membrane-based integrated systems. A case study on an integrated membrane system (IMS) for seawater desalination coupled with raw materials production is presented. The aim of this work is to show how membrane systems can contribute to the realization of the goals of zero liquid discharge (ZLD), total raw materials utilization, and low energy consumption.
Keywords： Membrane engineering Energy/water/raw materials production Beyond seawater reverse osmosis
Advancements in MOF-Based Engineered Materials for Efficient Separation Processes
Qilong Ren
Engineering 2023, Volume 23, Issue 4, Pages 1-2 doi: 10.1016/j.eng.2023.02.006
Progress in Macro and Micro Modeling of Solidification Process of Shaped Casting
Liu Baicheng
Strategic Study of CAE 2000, Volume 2, Issue 9, Pages 29-37
Facing the market economy and global challenge, the development of manufacturing industry, especially casting industry is critical to the national economy. However, there is quite a large technical gap between the casting industries at home and abroad. The views on the future trend of innovative casting technologies are consistent at home and abroad. They are： 1) key technology for manufacturing super large and heavy castings for the national engineering projects, 2) net shape casting technologies, and 3) application of modeling and simulation technology to substitute the traditional trial and error method. To reform the traditional casting industry by using computer technology is one of the hottest research frontiers attracted by many researchers and engineers. Computer simulation of solidification process of shaped casting can assure the quality of casting, optimize the casting technology, shorten the lead time and, therefore, decrease the developing and manufacturing cost. Recently, numerical simulation of mold - filling and solidification processes of casting and the prediction of shrinkage defects, etc. , have been put into application in many casting plants at home and abroad, and great progress in stress analysis and microstructure simulation has been achieved.
Keywords： shaped casting solidification modeling and simulation net shape casting
Zhang siliang
Strategic Study of CAE 2001, Volume 3, Issue 8, Pages 37-45
After reviewing the basic idea, methods of optimization and scale up for fermentation process adopted by many researchers for quite a long time, the author believes that the static optimizing method based on the kinetic conception with conventional optimum operating condition, in fact, is only an extension of kinetic conception of chemical engineering to the fermentation process. Such being the case, the existence of cellular metabolic flux is often neglected. Thus, the viewpoint to emphasize the metabolic flux analysis and control in bioreactor is put forward in this paper. Through several further experiments, the optimization technology of fermentation process at multi-levels based on the parameter correlation methodology and scaling-up strategy with multi parameters modulation have been realized. With the development of process sensing and computer technology, the new concept bioreactor (FUS-50L(A)) is used for fermentation processes optimization and scale up. This new bioreactor aimed at the measurement of material flux has been successfully applied to the fermentation of penicillin, erythromycin, aureomycin, inosine, guanosine, as well as the cultivation of recombinant human serum albumin, malaria vaccine, etc. As a result, thirty percent to several folds increase in titers were achieved. The process can be directly used for the scale up of Permentor from 50 liters to several hundred liters, even to 100 m3.
Keywords： bioreactor fermentation optimization scale up
Title Author Date Type Operation
Research on the railway construction process quality model based on the state-space method
Lu Shoudong,Zhou Guohua,Chen Haifeng and Zhao Guotang
Journal Article
The demonstration,decision process and practice of Three Gorges Project
Pan Jiazheng
Journal Article
Dynamic Visual Simulation for Concrete Dam Construction Process of the Xiangjiaba Hydro Station
Shen Mingliang,Chen Lihua,Chen Wei,Sheng Lemin,Su Junan
Journal Article
Insurance ratemaking method for risk of construction diversion project
Chen Zhiding,Hu Zhigen
Journal Article
A Perspective on Smart Process Manufacturing Research Challenges for Process Systems Engineers
Ian David Lockhart Bogle
Journal Article
Intermolecular and Surface Interactions in Engineering Processes
Jiawen Zhang, Hongbo Zeng
Journal Article
Membrane Crystallization for Process Intensification and Control: A Review
Xiaobin Jiang, Yushan Shao, Lei Sheng, Peiyu Li, Gaohong He
Journal Article
Recent Developments in the Crystallization Process: Toward the Pharmaceutical Industry
Zhenguo Gao, Sohrab Rohani, Junbo Gong, Jingkang Wang
Journal Article
Data Analytics and Machine Learning for Smart Process Manufacturing: Recent Advances and Perspectives in the Big Data Era
Chao Shang、 Fengqi You
Journal Article
Research of Collaborative Design Process Management Based on Activity Method
Hao Yongping,Zhang Jianfu,Shi Chunjing,Shao Weiping
Journal Article
Membrane Engineering for Green Process Engineering
Francesca Macedonio, Enrico Drioli
Journal Article
Advancements in MOF-Based Engineered Materials for Efficient Separation Processes
Qilong Ren
Journal Article
Progress in Macro and Micro Modeling of Solidification Process of Shaped Casting
Liu Baicheng
Journal Article
京公网安备 11010502051620号
