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Digitalization optical open loop test system for fiber optic gyroscope

ZHANG Deng-wei, SHU Xiao-wu, MU Xu-dong, LIU Cheng

Frontiers of Mechanical Engineering 2006, Volume 1, Issue 4, Pages 434-438 doi: 10.1007/s11465-006-0053-8

Abstract: With a digital sampling and processing system designed with VC++ in Windows platform, the real-time controllingprocedure, high-speed receiving and sending data can be carried out, and the results can be displayed

Keywords： stability real-time controlling standardization controlling procedure complete digitalization

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Study on key construction technologies of Xiamen Xiang’an subsea tunnel

Fu Hongxian,Liu Yongsheng,Guo Yanjing,Huang Mingqi

Strategic Study of CAE 2009, Volume 11, Issue 7, Pages 30-34

Abstract:

Xiamen Xiang'an subsea tunnel is the first subsea tunnel in China, whose geological conditions in the land are strongly weathered granite with enriched groundwater, shallow-buried excavation method is adopted. During the tunnel construction, the deformation of tunnel support is great. It is important to seek for a reasonable countermeasure to restrict the large deformation to ensure safety construction and advance through trials in locale. The arch crown settlement and level convergence are controlled effectively. Its subsea geological condition is granite.Drilling hole and blasting parameters trials are carried out through construction, and better blasting plan and parameters are gained. The ranges of rock crash of the tunnels are measured by using ultrasonic instrument and displacement record.

Keywords： Xiamen Xiang’an subsea tunnel excavation method working procedure controlling measure blasting

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Systematic screening procedure and innovative energy-saving design for ionic liquid-based extractive

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 1, Pages 34-45 doi: 10.1007/s11705-022-2234-3

Abstract: In the traditional extractive distillation process, organic solvents are often used as entrainers. However, environmental influence and high energy-consumption are significant problems in industrial application. In this study, a systematic screening strategy and innovative energy-saving design for ionic liquid-based extractive distillation process was proposed. The innovative energy-saving design focused on the binary minimum azeotrope mixtures isopropanol and water. Miscibility, environmental impact and physical properties (e.g., melting point and viscosity) of 30 ionic liquids were investigated. 1-Ethyl-3-methyl-imidazolium dicyanamide and 1-butyl-3-methyl-imidazolium dicyanamide were selected as candidate entrainers. Feasibility analysis of these two ionic liquids was further performed via residue curve maps, isovolatility line and temperature profiles. An innovative ionic liquid-based extractive distillation process combining distillation column and stripping column was designed and optimized with the objective function of minimizing the total annualized cost. The results demonstrate that the total annualized cost was reduced by 19.9% with 1-ethyl-3-methyl-imidazolium dicyanamide as the entrainer and by 24.3% with 1-butyl-3-methyl-imidazolium dicyanamide, compared with that of dimethyl sulfoxide. The method proposed in this study is conducive to the green and sustainable development of extractive distillation process.

Keywords： ionic liquid entrainer screening feasibility analysis extractive distillation

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Effects of combined procedure and devascularization alone on hyperdynamics of the portal venous system

HUA Rong, SUN Yongwei, WU Zhiyong

Frontiers of Medicine 2008, Volume 2, Issue 3, Pages 244-247 doi: 10.1007/s11684-008-0046-6

Abstract: PCDV) alone and conventional splenorenal shunt combined with pericardial devascularization (combined proceduredecreased by both surgical procedures, but the effect of decreasing FPP was much better in the combined procedureIt is suggested that the combined surgical procedure could integrate the advantages of shunting with

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Structure controlling and process scale-up in the fabrication of nanomaterials

Chunzhong LI,

Frontiers of Chemical Science and Engineering 2010, Volume 4, Issue 1, Pages 18-25 doi: 10.1007/s11705-009-0305-3

Abstract: Nanotechnology is already having a significant commercial impact, and will very certainly have a much greater impact in the future. The research on process engineering and scale-up will be very important for the commercial production and application of nanomaterials, because the properties and structure of nanomaterials are not only determined by the nucleation and growth process, but also strongly affected by the engineering properties, such as the mixing, the heat and mass transfer, and also the distribution of temperature, concentration, etc. This paper will present some research work in our laboratory on the fabrication of nanomaterials. Based on the chemical engineering principle and methods, many kinds of novel nanomaterials can be synthesized and their structure can be easily controlled through adjusting the parameters of the fluid mixing, and the distribution of temperature, residence time and concentration, etc. By using the micro-mixing, heat and mass transfer and reaction control methods, the host-guest nanocomposites have been assembled and assumed as the novel electroanalytical sensing nanobiocomposite materials. Based on the principles of chemical engineering, the manufacturing technologies for magnetic powders, calcium carbonate, and titanium dioxide have been developed for commercial-scale production, and the largest production scale has reached 15 kt/year.

Keywords： scale-up significant commercial electroanalytical engineering laboratory

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Four kinds of capping materials for controlling phosphorus and nitrogen release from contaminated sediment

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 3, doi: 10.1007/s11783-021-1463-x

Abstract:

• Lanthanum modified bentonite (LMB) can effectively absorb phosphorus (P).

Keywords： Sediment Eutrophication Thin-layer capping Phosphorus Nitrogen Aluminum-based P-inactivation agent

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A dynamic procedure based on the scale-similarity hypotheses for large-eddy simulation

ZHOU Bing, CUI Guixiang, CHEN Naixiang

Frontiers in Energy 2007, Volume 1, Issue 4, Pages 468-472 doi: 10.1007/s11708-007-0069-z

Abstract: Current dynamic procedures in large-eddy simulation treat the two subgrid-scale stresses in the Germano identity with the same subgrid base model. Thus to get the base model coefficient, the coefficient must be assumed to be consta

Keywords： large-eddy simulation Germano identity coefficient subgrid-scale

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Working Procedure of Developing a New Deep Hard-rock Burst-prone Deposit

Guo Ran,Yu Runcang

Strategic Study of CAE 2002, Volume 4, Issue 7, Pages 51-55

Abstract: In this paper, the authors create a general working procedure to develop a new hard-rock burst-proneThe general procedure is divided into 6 steps： initial determination of burst tendency; study of the

Keywords： rockburst mining technique working procedure

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Some Theoretical Issues on Procedure Neural Networks

He Xingui,Liang Jiuzhen

Strategic Study of CAE 2000, Volume 2, Issue 12, Pages 40-44

Abstract:

In this paper, a novel artificial neuron model-procedure neuron model is proposed, in which the inputsBased on these neurons, a model named procedure neural network, which is also a feedforward network withThe authors call this neural network as Procedure Neural Network (PNN) expanded on certain base functions

Keywords： procedure neural networks function approximation ability computational capability continuity

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Construction procedure study of ship chamber of Three Gorges Project ship lift

Zeng Ming

Strategic Study of CAE 2013, Volume 15, Issue 9, Pages 40-44

Abstract: Reasonable ship lift ship compartments chamber construction procedure and construction schedule arrangement

Keywords： construction procedure ship chamber ship lift Three Gorges Project

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New concept and procedure for reliability assessment of an IEC 61850 based substation and distribution

Hosein HAYATI,Amir AHADI,Seyed Mohsen MIRYOUSEFI AVAL

Frontiers in Energy 2015, Volume 9, Issue 4, Pages 387-398 doi: 10.1007/s11708-015-0382-6

Abstract: Smart grid is a power grid consists of extensive monitoring systems which deal with the monitoring of attributes such as current, voltage, power, and energy at distribution transformers, substations transformers, distribution switching devices and smart meters. Smart grid with advanced communication technologies can be used for several purposes such as efficiency and reliability improvement. IEC 61850 is the core standard in the smart grid domain for distribution and substation automation. This paper introduces a vision of modern substation and distribution systems using the IEC 61850. Network operators mainly assume that the modern substation and distribution systems based on the IEC 61850 are reliable for a long-time of operation. However, similar to any other systems, the implemented IEC 61850 might fail because of the operational failures or aging failures. This paper proposes a novel method for reliability evaluation of modern substation and distribution systems. A typical IEC 61850 based distribution and substation system is developed and analyzed using the proposed method. The fault tree analysis (FTA) is used to quantify the reliability of the system. The technique is implemented and demonstrated on the Roy Billinton test system (RBTS). The analysis is further extended on a 400/63 kV substation with a breaker- and-a-half configuration. In addition, the technique proves to be robust under different operations. The results verify the feasibility and applicability of the proposed method.

Keywords： IEC 61850 reliability assessment fault tree analysis

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Learning and Applications of Procedure Neural Networks

He Xingui,Liang Jiuzhen,Xu Shaohua

Strategic Study of CAE 2001, Volume 3, Issue 4, Pages 31-35

Abstract:

This paper deals with learning algorithms for procedure neural networks (PNN) and its applications

Keywords： procedure neural networks learning algorithm pattern recognition chemical reaction seepage

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Spray characteristics and controlling mechanism of fuel containing CO

Zhen HUANG, Jin XIAO, Xinqi QIAO, Gaozhi JIANG, Yiming SHAO, Seiichi SHIGA, Yasuhiro DAISHO

Frontiers in Energy 2012, Volume 6, Issue 1, Pages 80-88 doi: 10.1007/s11708-012-0180-3

Abstract: This paper presents studies of spray characteristics and controlling mechanism of fuel containing CONew insight into the controlling mechanism of atomization of the fuel containing CO was provided.

Keywords： spray characteristics fuel atomization fuel containing CO₂

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Factors controlling

Chengkun WANG, Xiaojian ZHANG, Chao CHEN, Jun WANG

Frontiers of Environmental Science & Engineering 2013, Volume 7, Issue 2, Pages 151-157 doi: 10.1007/s11783-013-0482-7

Abstract: The formation of cancinogenic nitrosamines, esp. -nitrosodimethylamine (NDMA) in water and wastewater treatment plants has drawn much attention in recent years. Dissolved organic matter from the transported Luan River water as water source of Tianjin was fractionated with different XAD resins and a series of ultra-filtration membranes with molecular weight (MW) cut-offs of 5k Da, 3k Da, and 1k Da, respectively. The NDMA yields from the raw water and each fraction were measured to investigate their role in NDMA yield. Results indicated that the hydrophilic fraction had a higher NDMA yield than those of hydrophobic fraction and transphilic fraction. The fraction with MW below 1k Da had a higher NDMA yield than that with larger MW. NDMA formation increased as the dissolved organic carbon (DOC) to dissolved organic nitrogen (DON) ratio decreased, which indicated that DON might serve as the real important precursor for NDMA. The correlation between NDMA yield and specific ultraviolet absorbance at 254 nm (SUVA ) suggested that the latter might not represent the specific precursors for NDMA in the water. Besides the water quality, the influences of pH, disinfectant dosage, and disinfection contact time on the formation of NDMA were also examined. These results will help water treatment plants establish measures to control this harmful disinfection by-product.

Keywords： N-nitrosodimethylamine (NDMA) disinfection by-product dissolved organic nitrogen (DOC) hydrophilic molecular weight (MW) specific ultraviolet absorbance at 254 nm (SUVA₂₅₄)

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Shape/size controlling syntheses, properties and applications of two-dimensional noble metal nanocrystals

Baozhen An,Mingjie Li,Jialin Wang,Chaoxu Li

Frontiers of Chemical Science and Engineering 2016, Volume 10, Issue 3, Pages 360-382 doi: 10.1007/s11705-016-1576-0

Abstract: Two dimensional (2D) nanocrystals of noble metals (e.g., Au, Ag, Pt) often have unique structural and environmental properties which make them useful for applications in electronics, optics, sensors and biomedicines. In recent years, there has been a focus on discovering the fundamental mechanisms which govern the synthesis of the diverse geometries of these 2D metal nanocrystals (e.g., shapes, thickness, and lateral sizes). This has resulted in being able to better control the properties of these 2D structures for specific applications. In this review, a brief historical survey of the intrinsic anisotropic properties and quantum size effects of 2D noble metal nanocrystals is given and then a summary of synthetic approaches to control their shapes and sizes is presented. The unique properties and fascinating applications of these nanocrystals are also discussed.

Keywords： two-dimension noble metal nanocrystal surface plasmon controllable synthesis