bluuebunny/crossref_metadata_2025 huggingface dataset:
The Dynamic Behaviors and Structure Conservation of Protein BMP-2 on Hydroxyapatite Nano Surfaces
Authors: Dong Xiu Li , Shao Chang Wen
Published: December 2012

The interaction between protein molecules and the hydroxyapatite (HAP) nano surface is an important research topic in many fields. However, the nature of their non-covalent bonding is still not clear at the atomic level. In this work, molecular dynamics (MD) simulation and steered molecular dynamics (SMD) simulation were used to study the adsorption-desorption dynamics of BMP-2 on HAP nano surface. The results suggest that there are two types of adsorption functional groups, –OH and –COO–. And the –COO– group plays the key role. Correspondingly, the Coulombic force between –COO– (in protein BMP-2) and Ca2+ (in the HAP nano particles) is the main adsorption mechanism. As to the conversation for protein BMP-2, it is found that the specific adsorption-desorption behaviors of BMP-2 play a great role in the conversation of the protein. And the conservation may go worse in the regions where the adsorbed residues are located.
Studies on Surface Hydroxypropylation and Swellability of Bacterial Cellulose
Authors: Wan Tong , Liu Li Ying , Zeng Wei , Zhu Yong
Published: December 2012

Bacterial Cellulose (BC) consisting of hydrophobic ultra-ﬁne ﬁbers was produced by Acetobacter xylinum. Hydroxypropyl bacterial celluloses (HPBC) were synthesized by surface modification of nano-fibrils via hydroxypropylation using two modifier systems, sodium hydroxide/ propylene oxide as system (I) and sodium hydroxide/urea/propylene oxide as system (II) respectively. The equilibrium swelling ratio (ESR) of HPBC was studied. ESR of HPBC obtained from system (I) was significantly higher than that obtained from system (II). The maximum ESR of HPBC was nearly 70 times larger than that of air dried BC and 10 times larger than that of freeze dried BC.
Evaluation of Tobacco Mixing Uniformity Based on Projection Pursuit
Authors: Li Jun Li , Mao Jian Lin , Yin Geng Yun
Published: December 2012

A new comprehensive evaluation method of tobacco mixing uniformity was presented in this paper. In this method, projection pursuit model was used to select evaluation index and determine the index weights. Seven chemical compositions which had a major impact on the overall evaluation, such as total volatile acid, total volatile bases, PH, polyphenol, protein, total nitrogen and chlorine were sampled repetitiously and calculated the average and coefficient of variance. Tobacco mixing uniformity was evaluated by the score according to coefficient of variance. Comprehensive evaluation of five batches of tobacco was carried out and the results were consistent with the traditional. This method was easy to get basic data and evaluation results fitted the actual. It was a simple and practical evaluation method of mixing uniformity.
Assembly Simulation and Analysis of Dynamic to Ingoter Based on Pro/E
Authors: Xu Xiu Fen
Published: December 2012

In order to prove the rationality and correctness of assembly sequence planning to ingot of aluminum caster, it established model of assembly simulation based on Pro/E. The interference information of static and dynamic state is gained. At the same time, the rationality and correctness of assembly sequence planning is proved. The feasibility of scheme is proved by checking some parameters in system. it provides an important reference for further analysis kinetic simulation
A Dual-Band LTCC Antenna with Cross Circuitous Structure
Authors: Hao Hong Gang , Hu Wen Shuai , Tian Hai Yan , Ren Yi
Published: December 2012

A compact dual-band antenna for ISM (2.45GHz) or WiMAX (3.15GHz) applications by low-temperature co-fired ceramic (LTCC) technology is presented in this paper. The proposed antenna is composed of multi-layer structures to reduce the sizes effectively. The simulated results show that the dimensions of the antenna are 11×4.2×1.2mm3, with the 2:1 VSWR impedance bandwidth definition, the lower and upper band have the bandwidth of 80 and 90 MHz. The novel antenna has realized miniaturization and omni-directional radiation patterns across the whole operating frequency band.
Optimization of DVG850 Dual-Screw Worktable System Based on ANSYS Workbench
Authors: Yi Jiang Miao , Gao Dong Qiang , Zhang Fei , Lin Huan
Published: December 2012

In traditional single-screw worktable system, the system is always subjected with torque because the driving force and force-bearing point of the workpiece always change with the processing path, so its performance may be affected. Therefore, the scheme of dual-screw worktable system is put forward and modal analysis with ANSYS Workbench is made by taking DVG850 high-speed vertical machining center worktable system for example. Then four alternatives of the machine are proposed based on the position of screw and guide.Through modal analysis of different parameters of the system, we ultimately select the dual-screw worktable system with highest performance (Screws place inside of the guide and horizontal distance of the two screws is 310mm.) as the optimalizing plan. This provides a reliable reference for further study on dynamic analysis of worktable system.
Normal and Abnormal Non-Speech Audio Event Detection Using MFCC and PR-Based Feature Sets
Authors: Barkana Buket D. , Uzkent Burak , Saricicek Inci
Published: December 2012

Non-speech audio event detection and classification has become a very active subject of research, since it can be implemented in many important areas: audio surveillance and context awareness systems. In this study, non-speech normal and abnormal audio events were detected by Mel-frequency cepstrum coefficients (MFCC) and Pitch range (PR) based features using artificial neural network (ANN) classifiers. We have 4 abnormal events (glass breaking, dog barking, scream, gunshot) and 2 normal events (engine noise and rain). Event detection, using ANN classifiers, resulted in an accuracy of up to 92%, with recognition rates overall in the range of 78%-87.5%.
Simulation and Optimization of a Biscuit Processing Production in an Industrial Scale by Use of MLP and RBF Neuro Fuzzy Network
Authors: Menita Paulo Renato , Affonso Carlos de Oliveira , Santana José Carlos Curvelo , Sassi Renato José , Vanalle Rosangela Maria
Published: December 2012

An industrial process of corn biscuit manufacture had been simulated and optimized by RBF and MLP networks, in this work. Data bases of the cooking process, in continuous, indirect, gas-fired oven (industrial scale) were used to the best understanding the behavior of the control variables. Weight and thickness of a corn biscuit were used as responses. After training, neuro Fuzzy model was applied on experimental data. Results showed that Neuro Fuzzy network has a good response surface, for both RBF and MLP networks; it showed low values of average error. The RBF and MLP network architectures showed satisfactory results, in line with the experimental data. Optimization showed that is possible to obtain one biscuit with 4.64-5.00 g and 5.14-5.65 mm of thickness and wrapping up in a package of 400 g of net weight. This allows the maintenance of the product of the damaged norms of quality.
The Microstructure and Friction Properties of In Situ TiB2 Particle-Reinforced Al-10Sn Matrix Composites
Authors: Cui Guo Ming , Li Xing Xia , Zeng Jian Min
Published: December 2012

To develop a new bearing material with promising tribological properties, low cost and without harmful elements, the TiB2 particle-reinforced Al-10Sn matrix composites were fabricated by Mixed Salt Reaction synthesis process. The solidification microstructure of the composites was investigated by optical microscope and scanning electron microscope. The results indicate that the grains of α-Al matrix are fine, the TiB2 particle size is less than 1.5μm, and the agglomeration of TiB2 particles is mainly present at the boundary of α-Al phase, where the mechanical mixture of TiB2 and β-Sn was observed. The oil lubricated sliding friction tests of composites and matrix alloy were conducted on a small thrust ring versus disc friction testing machine under different loads. The results indicate that, at low load (200N), both of composites and matrix alloy have a conspicuous running-in period and exhibit a better antifriction property with the coefficient of friction (hereafter COF) being 0.017 and 0.015, respectively. However, at high load (400N), the COF of composites and matrix alloy is approximately 0.080 and 0.17, with the frictional temperature being 58°C and 75°C, respectively. The composites exhibit higher bearing capacity and excellent antifriction
Theory of Yarn Dynamics during Unwinding from Packages
Authors: Praček Stanislav
Published: December 2012

We derive the system of coupled nonlinear differential equations that govern the motion of yarn in general. The equations are written in a (non-uniformly) rotating observation frame and are thus appropriate for description of over-end unwinding of yarn from stationary packages. We comment on physical significance of virtual forces that appear in a non-inertial frame and we devote particular attention to a lesser known force, that only appears in non-uniformly rotating frames. We show that this force should be taken into account when the unwinding point is near the edges of the package, when the quasi-stationary approximation is not valid because the angular velocity is changing with time. The additional force has an influence on the yarn dynamics in this transient regime where the movement of yarn becomes complex and can lead to yarn slipping and even breaking.
Support Vector Regression Based Nonlinear Model Reference Adaptive Control
Authors: Ye Xin Xin , Lu Jian Gang , Yang Qin Min
Published: December 2012

Model reference adaptive control (MRAC) is widely used in linear system control areas, and Neural Networks (NN) is often used to extend MRAC to nonlinear areas. However, this kind of solution inherits some drawbacks of NN, including slow learning speed, weak generalization ability, local minima tendency, etc. Given these drawbacks, this paper attempts to use support vector regression (SVR) as a substitute of NN. In this approach, SVR is employed to compensate the nonlinear part of the plant. A stable controller-parameter adjustment mechanism is constructed by using the practical stability theory. Simulation results show that the proposed approach could reach desired performance.
Research on Delegation Authorization Model Based on TRBAC and Attribute
Authors: An Jia , Yao Shu Zhen , Zhang Liang
Published: December 2012

Task-role-based access control (TRBAC) model widely used in workflow does not support the delegation strategies and does not consider the characteristics of entities in the system. In order to meet the requirements of delegation in the workflow environment, this paper proposes a delegation model called TRBAC-and-Attribute-based Delegation (TRABD) model. TRABD model introduces the concept of delegation and attribute to TRBAC model. To improve the security of the delegation process, delegation constraints in TRABD model consist of not only delegation condition role (CR), but also attribute constraint (ATC), delegation-role constraint (DRC), delegation constraint (DC). For better flexibility, ATC is divided into three types: strict ATC, weak ATC and user-defined ATC, so that the delegator can temporarily delegate high level permission to low level delegatee. In addition to this, it maintains the advantagement of traditional TRBAC model.
One-Hop Path Routing Based on Heuristic-K Method Using ACO
Authors: He Zheng , Wei Fan , Huang Xiao Hong , Ma Yan
Published: December 2012

Overlay networks have emerged as a promising paradigm for providing customizable and reliable services at the application layer, such as fault-resilient routing, multicast, and content delivery. Among the overlay network architecture, overlay routing is an important aspect of the overlay network design. In this paper, we develop a one-hop source routing, called heuristic-K algorithm using Ant Colony Optimization, to allow individual nodes to optimize route selection based on specific metrics like delay, loss rate, or throughput. Moreover, due to the selfish operating manner of overlay routing, we also take the traffic engineering element into consideration in the design process of our proposal. The experimental results demonstrate the effectiveness of the routing algorithm.
Contribution to the Mapping of the Landslide of Ain El Hammam (Algeria)
Authors: Djerbal Lynda , Melbouci Bachir
Published: December 2012

The town of Ain El Hammam is based in crest of a hill affected by an active and extensive landslide. The complexity and significant evolution of this instability makes risk management more difficult. We realized in this paper a mapping of the slope and a study of risk and hazard-induced by ground movements in this region and this by taking into account the probable causes of instability. The principal advantage of the model of assessment of hazard developed is the possibility to realize punctual studies of the risk on natural or artificial slopes. Moreover, this work constitutes just a contribution to the safety management of Ain El Hammam.
Digital Forensic Technology of Solaris
Authors: Zhao Fei , Zhang Jing Sheng , Wang Zhong Xia
Published: December 2012

The UFS file system of Solaris is not supported undelete operation, so it is a difficult thing to digital forensic. This paper based on the UFS documents of 10 Solaris’ the log file system and the physical structure of UFS file system’s storage, putting forward the method of digital forensic for it. In cases of actual digital forensic for Solaris 10, it can restore the required documents, so this method has good effect
Welfare - Oriented Public House Distribution System by Knowware System
Authors: Sun Wen Jun , Lo Sio Long , Chen Yuan , Chen Dong Liang , Ding Liya
Published: December 2012

This article purposes a solution of constructing hybrid knowledge-based system using intelligent components in Knowware System (KWS), for the recommendation of an optimal house distribution plan to management based on manager’s feedback. The target system is customized and can be easily modified or reconstructed according to manager’s specific need when relevant policies and constraints are considered.
Unified Information Modeling for Achieving High-Performance Information Sharing in the Information Grid
Authors: Zhang Ying Chao , Zhang Jing , Yu Qin Zhang , Ye Feng , Li Wei , Shen Zhi Ming
Published: December 2012

In this paper, an unified information description model (“UIDM” for short) is proposed to model information from multiple sources in the Information Grid uniformly. In the UIDM: 1) An unified information description language derived from the ODLI3 is presented to describe information uniformly to resolve the information heterogeneity; 2) A set of diagrammatized information modeling symbols are defined to model the information diagrammatically to illustrate the semantic relationships between information classes; 3) An information capability model is advanced to model the capability of information from different information sources, based on which the high-performance global views for information sharing are to be constructed.
The Design of Inter-Regional Fire and Rescue Mobilization System
Authors: Li Chi Yuan
Published: December 2012

The inter-regional mobilization is the scene of the fire power of the commanders of major hazard of fire according to first make the decision that the activities of fire rescue and command necessary step, whether the power to mobilize quickly, accurately and reasonably, is directly related to fire fighting and rescue operations success or failure[1]. Therefore, how to live according to the fire situation in a scientific and rational mobilization of fire fighting and power, integration and complementarity of fire and rescue resources, is to achieve regional rapid disposal of the fire units to improve performance of the fire rescue and command must be a key issue to face. This paper reviews the inter-regional fire power mobilization system development overview, an analysis of the system's user needs, and to inter-regional fire service emergency mobilization theory, the power to mobilize the light of regional fire law and algorithm model, using ESRI's ArcIMS map service platform, constructed under the framework of regional-based WebGIS scene of the fire power to mobilize the system. A brief introduction of the inter-regional scene of the fire power to mobilize the system design process, data sharing, the core modules such as content.
Network Manufacturing Technology Based on Cloud Computing
Authors: Wang Peng Fei , Diao Xiu Hui
Published: December 2012

This paper presented cloud computing can be widely used in the multiple links of the production process, for network manufacturing. Cloud can achieve the enterprise design, collaboration, supply, manufacture and sale work. Advantage of the cloud can share resources, and improve equipment utilization. This article further used the WebService technology to build the framework of the Cloud Manufacturing Systems, with realized the parameters of virtual design services, virtual processing services and virtual exhibition.
The Waterfilling Based Subcarrier and Power Allocation for OFDM Cognitive Radio Networks
Authors: Ma Yue Huai , Zhang Dong Mei , Xu You Yun
Published: December 2012

In this paper, the subcarrier and power allocation problem for the orthogonal frequency division multiplexing (OFDM) cognitive radio network which coexists with the primary network is studied. Specifically, in consideration of both transmit power constraints of secondary users and interference power constraint at each primary receiver. A cognitive waterfilling (CWF) power allocation algorithm which based upon the classical waterfilling mechanism is proposed for the single SU and multi-PU scenario. As for the multi-SU and multi-PU case, we present an efficient joint subcarrier and power allocation algorithm called MS-CWF algorithm with low complexity. Simulation results show the effectiveness of the proposed CWF and MS-CWF algorithms.
A Delamination Factor Prediction Model for Drilling of Composite Materials
Authors: Wang Xu , He Yan Li , Wang Jing Yi
Published: December 2012

In this paper，according to the shell theory , model are developed to predict delamination damage in the drilling process. Finally, we will get theoretical delamination factor and complete the prediction of the delamination damage area. The known references didn’t find similar model of predicting delamination damage. Therefore, it is new method. With the drilling process experimental contrast，the model is more effective for the prediction of delamination of the carbon fiber composite materials.
Research on Tensile Strength in the Ultrasonic Welding Joint of T-Type Wood-Plastic Composites Components
Authors: Zhao Hui , Zhou Yi Long , Zhu Hong Yuan , Zhang Sheng Yuan
Published: December 2012

Ultrasonic welding technology is applied to the connection of T-type wood-plastic composites components to study its performance. The wood-plastic composite materials are made up of 60% wood-flour (WF), 36% polypropylene (PP) and 4% maleic anhydride grafted PP (MAPP). Tensile strength of the welded joint, which oscillation time is 4 seconds, is analyzed based on experimental data. Welded joint is observed by scanning electron microscope and its connection status is analyzed. Experiment results show that ultrasonic welding technology can be applied to T-type wood-plastic composites component, which has enough tensile strength.
The Supply Chain Automorphism from the Perspective of Metadata Ontology: An Extended Supply-Chain Operations Reference-Model
Authors: Fu Shi Chang , Wang Hui Fen
Published: December 2012

Considering the four “collaboration paradoxes” that commonly referred to, this paper introduces the automorphism theory and metadata ontology approaches into SCM. With an objective of providing a theoretical lens to show and solve the essential supply chain collaboration issues, this paper proposes the Extended Supply-Chain Operations Reference-Model (eSCOR), and its associated definitions, layers, sub-models followed by the discussions of two typical business elements: objects versus flows. Specifically, this paper confirms the supply chain automorphism within the eSCOR, and discusses its characteristics of self-symmetry as the solution to the four paradoxes mentioned before. This paper closes with insights gained from this study and extensions for future researches.
Bridging the Gap between Technology and Business within Corporate Governance of Enterprise: Focus Areas of Special Attention in the Technology Domain
Authors: Alonso Igor Aguilar , Verdún José Carrillo , Caro Edmundo Tovar
Published: December 2012

This paper describes the importance of technology within the corporate governance of companies, representing two main domains in enterprise architecture: business architecture and IT architecture, helping to bridge the gap between the two main domains. IT Architecture is considered as a key domain in corporative governance, giving the adequate support to business architecture that helps to improve business. Due to evolution in markets of products and services, and technological changes, as well as the strong impact of technology on all areas of business, it is necessary to clearly distinguish the importance of the IT architecture domain, as well as focus attention on the different areas related in the technology domain.
The Effect of Government Technology Funding on Business R & D Expenditure in China and OECD Countries
Authors: Tang Qing , Liu Yu Jie
Published: December 2012

This paper analyzes the effects of government science and technology funding on business R & D expenditure in China and OECD countries from 1991 to 2007.Compare the regression results, studies show that: overall, the leverage of government science and technology investment is greater than the crowding-out effect both in China and OECD countries, and the net effect of China is much larger than OECD countries. Both R & D funding of the government providing to universities crowd out business R & D spending, especially OECD countries, then make relevant policy recommendations.
Emerging Markets: Product and Service Opportunities for Middle and Upper Middle Class
Authors: Loi Daria , Ganapathy Subhashini , Prabhala Sasanka
Published: December 2012

The middle and upper middle class population in the often termed emerging markets is typically a less investigated target as most consumer research and development efforts for such markets are primarily focused on rural communities as well as the lower to middle class population. We believe that, in a context where emerging markets are in constant transformation and the middle to upper middle classes are on a substantial growth path, it is important to explore appropriate ways to address these market segments as they represent an opportunity space for technological research and development. This paper discusses and shares results of a recent case study where a number of concepts and products were developed for such market segments in emerging markets and subsequently tested in China, Egypt, India and Brazil. This paper is an extended version of “The rise of middle and upper middle class in emerging markets: Products and service opportunities”, published in Proceedings of the 20th Australian Conference on Computer-Human Interactions: Designing for Habitus and Habitat, OZCHI, 2008 [1].
Modification of Structure and Properties of Steel Р6М5 at Electrolyte Plasma Treatment
Authors: Skakov Маzhyn , Rakhadilov Bauyrzhan , Scheffler Michail
Published: December 2012

Mechanical characteristics of nitrated and carbonitriding in electrolyte plasma steel Р6М5 surface layers are investigated in the research. It shows perspectiveness of the cutting tool electrolyte-plasma treatment technology. Comparative research of structure, phase composition of fast-cutting P6M5 steel modified surface layers after electrolyte plasma treatment was carried out by scanning-electron and light microscopy, and X-ray structure analysis methods.
Influence of Deformation on the Phase-Structural State of Steel 30CrMnSiA
Authors: Skakov Мazhyn , Uazyrkhanova Gulzhaz , Popova Natalya , Sheffler Michael
Published: December 2012

We have studied fragmentary substructure of 30CrMnSiA steel after rolling deformation. It has been stated that in the studied material the bulk share of anisotropic fragments makes 25% and isotropic fragments share is 75%. We have found out that martensite structure is completely broken in the rolling process
Research on the Porosity and Pore Size of Spun-Bonded Fabrics Based on Matlab7.0 Image Processing Technology
Authors: Yuan Ru Fang , Wang Yong Yang , Zhu Cheng Yan
Published: December 2012

The image with high resolution was obtained through scanning the spun-bonded fabric, and processed with the help of Matlab7.0 software to calculate the pore structure of the spun-bonded fabric. On the basis of the relationship between number of pixels and area, the porosity and average pore size of spun-bonded fabric were analyzed; pore size and porosity were calculated by using the equation method and the air bubble test method as well. By comparing the data of the two methods, the correlation between them was gotten. Finally, it was shown that using the image processing technology to research the pore structure of spun-bonded fabric was a feasible way. There are various factors affecting the performance of textile filtering materials, and the porosity and pore size of the fabrics play an important role in filtration. As is known to all, fabric porosity and pore size are indicators to measure the size of fabric pore volume, one is the ratio of pore volume with the total fabric volume, and the other one refers to the average diameter of the holes in the textile filter material. They directly affect the permeability, the hydraulic conductivity of the fabric and the ability to prevent the particles getting through. Generally speaking, the bigger the porosity and pore size, the greater the permeability coefficient and the better the permeability of the filter material. Porosity and pore size directly affect the product's function and application. Therefore, the pore structure has a great impact on textile filter performance [1]. Nowadays, the formula method was generally used to calculate the porosity, and the bubble method was always used in testing pore size.
Releasing Behavior of Chloride Ions in Marine Sands under Cement Environment
Authors: Zhang Jian Chao , Chen Chi , Ye Yang Yang , Xing Feng , Dong Bi Qin
Published: December 2012

In this paper, the releasing behavior for chloride ions in concrete with marine sands is studied. The experimental results show that chloride ion is released completely as soon as marinating in water. And the total releasing of chloride ion has little grown over time. The releasing of chloride ion would not be changed with the increasing quality of marine sand. Whereas, the releasing behavior is different for the different quantity of marine sand in saturated Ca(OH)2 solution which the content of chloride ion decrease with the increasing of marine sand. SEM/EDS observations show that distribution of chloride concentration in the mortar with marine sand is inhomogeneous and the chloride ions reveal a permeable process from surface of marine sand to the internal of cement gel. But for the experimental results of the mortar with internal doped chloride ions from NaCl solution, there is no permeable process in chloride ion of mortar and its distribution is irregular in the products of cement hydration.
Experimental Study on NO Emission Characteristics of Corn Stalk Combustion in O2/CO2 and O2/N2 Atmospheres
Authors: Liu Wen Yong , Gou Xiang , Liu Lian Sheng , Zhang Kai , Wu Jin Xiang , Wang En Yu
Published: December 2012

The experiments of corn stalk combustion in 21%O2/79%CO2 and 21%O2/79%N2 atmosphere at different temperatures (800°C-1200°C) were performed in a fixed-bed reactor experiment system. NO concentration as a function of time and NO yield were obtained. The results show that NO emission is lower in 21%O2/79%CO2 atmosphere than that in 21%O2/79%N2 atmosphere at the same temperature. With the elevation of temperature, NO yield increases first and then decreases in the same atmosphere.
Effects of MoSi2 and Si3N4 on Performance of Sintering and Antioxidation of AlN-ZrO2 System Composites
Authors: Feng Bin , Wang Rong Lin , Wu Guang Na , Bu Jing Long
Published: December 2012

AlN-ZrO2 system composites were prepared with Ca-stabilized zirconia (Ca-PSZ, particle size d50=29.3 μm) and AlN power (d50=0.5 μm) as raw material, MoSi2 (d50=2 μm) and Si3N4 (d50=44 μm) as additives respectively, in N2 atmosphere by pressureless sintering at 1600 °C. The phase compositions were investigated by XRD. The sintering performance of the composites was measured by the checking of the bending strength and the apparent porosity of samples. The anti-oxidation performance of the composites was analyzed by the checking of oxidation weight increased of samples. The results showed that phase compositions of the composites consisted of ZrO2, ZrN, CaAl12O19 and CaAl2Si2O8when the content of AlN was 8 wt %. The additives promoted the sintering of AlN-ZrO2 system composites. As a result, introduction of the additives increased the oxidation of the composites due to oxidation expansion of phases ZrN.
Preparation and Performance of Myristic Acid/Silicon Dioxide Composites as Thermal Energy Storage Materials
Authors: Shi Qi Song , Liu Kui Long
Published: December 2012

The myristic acid/silicon dioxide composite materials were prepared by sol-gel methods. The myristic acid was used as the phase change material for thermal energy storage, with the SiO2 acting as the supporting material. The structural analysis of these form-stable myristic acid /SiO2 composite phase change materials was carried out using Fourier transformation infrared spectroscope (FT-IR).The microstructure of the form-stable composite phase change materials was observed by a scanning electronic microscope (SEM). The thermal properties was investigated by a differential scanning calorimeter (DSC).The SEM results showed that the myristic acid was well dispersed in the porous network of SiO2. And the new nanocomposite material has favorable thermal storage capacity and can be applied to solar energy storage, industrial waste heat, recovery of waste heat and as civilian structural materials.
Special Crude Oil Processing Research and Application of XinMu Oil Field
Authors: Liu Qing Wang , Wang Yong An , Fan Zhen Zhong
Published: December 2012

The main problem dehydration system of XinMu Oil Field at present is high dehydration temperatures,high the amount of demulsifier, increase output moisture content year by year and more and more frequent fluctuations.Through the reform to establish a dehydration subsystems,and composite demulsifier alone to deal with special oil to eliminate the influence of special crude oil to dehydration system.Filter out Daqing produced 169＃ demulsifier 150mg·L-1, when add oxalic acid 200mg·L-1 and fungicide 100mg·L-1 the demulsifier of good dehydration effect.After processing crude oil water content of less than 5%,sewage oil content of less than 20mg·L-1, which has solved the dehydration problems of troubled XinMu for many years.
The Preparation of Composite Zeolite Filter
Authors: Li Miao Wan , Yu Yan Zhen , Gao Long Long
Published: December 2012

Using natural-zeolite as main raw material, prepare spherical composite zeolite filter material by adding adhesive, pore-forming agent, etc. By measuring cylinder compressive strength apparent porosity and adsorption capacity of ammonia and doing orthogonal experiment, the optimal process combination is C3A1B3, namely ω zeolite powder : ω adhesive : ω pore-forming agent =55%：35%：10%, activation temperature is 150°C, activation time is 3h.The end product’s packing density is 674Kg/m3, cylinder compressive strength is 4.32MPa, and apparent porosity is 59.02%.
Environmental and Economic Analysis of Valve Regulated Lead-Acid Batteries Recycling Process
Authors: Li Dong Mei , Li Yuan , Guo Yang , Zhao Guang Jin , Wang Yong Wei
Published: December 2012

We have reported the environmental and economic effects of VRLA recycling methods. The possible waste water, solid and gas produced in the recycling process are fully discussed. Through proper treatments, the wastes can be emitted according to corresponding standards. And careful disposal of VRLA results not only in less environmental pollutions, energy and mineral resources consumptions, but also in considerable economic profits.
Low Grade of Kyanite Ore Beneficiation Experimental Research in Xingtai
Authors: Zhang Jin Xia , Dai Qi Hui , Tian Li Nan , Wang Xing Guo
Published: December 2012

As high-grade refractories raw material，kyanite is widely used and the market demand is increasingly greater. To identify the process mineralogical properties of kyanite from Heibei so as to provide a mineralogical basis for its chemical composition, mineral constituent，ores texture and structure and so on. The results show that: the kyanite Al2O3 21.50%, SiO2 52.87%, using high intensity magnetic separation-gravity separation-flotation folwsheet. Experiments show that, the grinding fineness of -200 mush 65%, with strong intensity magnetic separation, magnetic concentrate by shaking the low intensity magnetic separation，we can get magnetite, garnet, biotite and phlogopite four concentrates, strong magnetic ore tailings consolidated by a rocking bed mud thrown first, refined through flotation, won Kyanite concentrate grading about 56.11% at a recovery of 49.90%.
Synthesis and Adsorption Property of Graphite Oxide Modified GF/EPDM Foamed Composite
Authors: Liu Xiu Qi , Xing He Qin , Zhao Li Li , Wang Dan
Published: December 2012

In our study, a new kind of water treatment composite was prepared by melt blending and molding foaming, with synthetic rubber EPDM as the matrix, graphite oxide modified glass fiber (GF) as the filler. The foamed composite had a certain adsorption capacity of methylene blue dye in the water and toluene. With the increase of the graphite oxide modified GF, the composite on the methylene blue adsorption rate was increased, however, for toluene, the rate of adsorption was reduced. Due to restrictions on the oxidation of graphite and composite structures and the adsorption capacity of the material was limited.
Development and Prospect of Al Scraps Reproduction Technology in China
Authors: Sun De Qin
Published: December 2012

Al scraps reproduction was the need of sustainable development. The main factors which influenced the quality of Al alloy recycling products was contaminating elements and non-metallic inclusions. Thus the critical technique in promoting the Al scraps reproduction process was how to relieve the harmful effect of non-metallic inclusions and effectively control the types and number of impurity elements. The research for Al scraps reproduction should be developed as a individual system, main contents includes effective separation of varies metallic materials, remove of contaminating elements, solidification control, etc. and furthermore study the technology of high ratio of Al recovery and improve the process of saving energy, lower consumption and reduce pollutants.
Preparation and Characterization of Immobilized α-Amylase
Authors: Geng Zhi Jie , Lin Song Bai , Huang Gao Shuang , Ke Ai Ru
Published: December 2012

P(DMAA-co-AM)hydrogel; adsorption method; a-amylase; Immobilized enzyme. Abstract. P(DMAA-co-AM)hydrogel was prepared by aqueous solution polymerization with N,N-dimethylacrylamide(DMAA) and acrylamide(AM) as monomers.,taking the P(DMAA-co-AM) hydrogel as carrier, a-amylase was immobilized by adsorption method.The investigation of effection of temperature and pH on enzymatic activity exhibites that the optimum temperatures are 50°C for both free and immobilized enzyme,the maximum activity is observed at pH 6.0 for both free and immobized enzyme. The activity of immobilized a-amylase remaines higher 40% at sixth run. Kinetic studies demonstrate that: Km values are 5.15749 and 1.44479 mg/mL for free and immobilized enzyme, Vmax values are 2.56082 and 0.58272 mg/mL min-1 for free and immobilized enzyme.
Effect of Heating Treatment of Fresh Rice Bran on Stabilization
Authors: Gong Zhu , Yu Guo Ping , Dou Chao Ran , Xu Man Xu
Published: December 2012

In the research of rice bran stabilization, most of the literature only study the lipase which is explained by the changes in free fatty acids in the storage experiment or peroxidase activity. It leads results not comprehensive, extends the experiment time, increases the experimental difficulty and wastes of manpower and material resources. For the first time, the effect of heat treatment on fresh rice bran stability is examined in terms of direct determination of water content, lipase activity, peroxidase activity and total antioxidant capacity. The optimal condition is that 120 degrees for 22 min. The results show that the heat treatment can reduce the enzyme activity of rice bran to improve the stability of rice bran.
Extraction of Elopichthys bambusa Oil with Various Methods
Authors: Yi Cui Ping , Zhong Chun Mei , Xiang Jian Guo , Chen Yong Fa , Liu Rui Xing
Published: December 2012

The sensory properties, oil yields, acidity values (AV) and peroxide values (PV) of Elopichthys bambusa viscera oil extracted by 5 methods were analyzed. Results indicated that E. bambusa oils extracted by solvent extraction (SE), enzymatic extraction (EE) and fried extraction (FE) had the best sensory properties. The highest E. bambusa oil yield reached 53.67% by EE, the lowest AV and PV was 5.91mg/g oil and 24.41meq/kg respectively through potassium hydrolysis extraction (PE), while the poorest quality oil was obtained by the boiling hot water extraction (HE), from which the AV and PV values were up to 15.58mg/g oil and 103.78meq/kg, respectively. Overall, EE was the most suitable method for E. bambusa viscera oil extraction.
Preparation and Property Evaluation of Anionic Clean Fracturing Fluid
Authors: Liu Guan Jun , Li Xiao Rui , Zheng Li Jun
Published: December 2012

An anionic surfactant clean fracturing fluid was synthesized and its main performance was studied. The viscosity of fracturing fluid increased with increasing dosage of anionic surfactant. And the viscosity of fracturing fluid increased first, and then decreased with increasing concentration of KCl. The viscosity reached maximum 360 mPa•s when the KCl content is 2.7%. The results showed that the fracturing fluid had best temperature resistance and shear resistance performance under the condition of 100°C and at the shearing rate of 170 s-1. The sedimentation velocity of sand in the fracturing fluid are about 11.124, 18.840 mm/min at the temperature of 80°C and 120°C respectively. It indicated that the fracturing fluid has a better sand-carrying performance. The viscosity of fracturing fluid decreased below 5 mPa•s during 70 minutes when the dosage of kerosene was 3%, and the surface tension of the breaker fluid is 26.10 mN/m while the interfacial tension is 0.73mN/m. The low surface tension can meet the requirements of operation. The damage rate to the core is 7.65% and the fracturing fluid has lower damage to core than guar gel.
Removal of Chemical Oxygen Demand in Tannery Effluent by Flocculant
Authors: Yang Qin Huan , Zhao Chang Qing
Published: December 2012

The chemical oxygen demand (COD) in tannery wastewater was treated by prepared flocculant at different conditions. The results showed that the most suitable reaction conditions were attained at a temperature of 25°C, pH of 8, flocculant of 0.2 g/L when the shaking speed of 150 r/min and the reaction time was 15 min. Through testing the saccharide and protein in the flocculant, it was found that the flocculant contained saccharides and proteins.
Kinetic Spectrophotometric Method for the Determination of Trace Ruthenium(III) by its Catalytic Effect on the Oxidation of Dibromo Caboxy Arsenazo with Bromate in Cationic Micellar Media
Authors: Zhou Zhi Rong , Zhang Li Zhen
Published: December 2012

A spectrophotometric method was developed for the determination of trace Ru (III) is described, based on its catalytic effect of Ru (III) on the oxidation of dibromo caboxy arsenazo (DBCAA) by bromate in acidic and micellar medium at 100 °C. The reaction was monitored spectrophotometrically by measuring the decrease in the absorbance of the catalytic reaction of DBCAA at 530 nm with a fixed-time method. The calibration curve for the recommended method was linear in the concentration range over 0.037–1.0 µg/L and the detection limit of the method for Ru (III) was 0.011 µg/L. The method was applied to the determination of Ru (III) in some ores and metallurgy products. The results are in good agreement with the recommend values with the relative standard deviation of 2.6 %–3.8 % and the recovery of 97.2 %–104.3 %.
Simulation on Application of Dividing Wall Column in Aniline Distillation
Authors: Wang Er Qiang , Li Zeng Xi , Li Cheng Yue
Published: December 2012

In this paper, application of DWC with side rectifier (DWC-SR) to aniline distillation was studied. Simulation using Aspen plus software was done to compare the traditional two tower process with new process based on DWC-SR. The results show that, the two processes has no obvious difference on energy cost, which is also decided by the characteristics of DWC-SR, but capital investment and space saving can be gained for DWC-SR process. In addition, only an reboiler is need in DWC-SR process, so residence time of aniline, nitrobenzene, etc inside high temperature region can be reduced, so can avoid heat decomposition of these thermosensitive substances to a great extent.
Study on Gas Control in Coal Mine by Methanotrophic Bacteria M02
Authors: Tang Jian Xin , Mao Fei , Guo Ze Jing , Peng Jiao Jiao
Published: December 2012

Gas control technologies traditionally base on the physical properties of gas. However, making use of microbial technology is another way to deal with coal seam gas. This paper conducted the laboratory test firstly, selected a bacteria M02 to degrade methane efficiently, and the strains were identified as Methylophilus sp.; the conservation of matter experiment verified its ability of methane degradation; then the industrial experiment was implemented in the coal mine underground showed that by the use of methanotrophic bacteria, and the gas concentration of return air, gas content, gas pressure and the index of K1-value had been decreased in different degree. Hence large-scale use of microbial technology on gas control is feasible.
Study on White Mud Calcium Carbonate’s Crystallization Character in Causticization Process of Straw Pulping
Authors: Zhang Ping , Xia Xin Xing , Liu Feng
Published: December 2012

Through improving the traditional causticization process, such as needle-like White Mud and rice-like White Mud are obtained by adding auxiliary agent and controlling the causticizing reaction conditions. Results show that the uniform needle-like White Mud and rice-like White Mud can be better applied to paper filling, especially the needle-like White Mud, which demonstrates higher opacity and higher whiteness than commercial PCC, while has the same influence on strength and other properties with commercial PCC.
Synthesis of AM-co-NVP and Thermal Stability in Hostile Saline Solution
Authors: Liu Rui , Pu Wan Fen , Peng Qin , Yao Feng Sheng
Published: December 2012

copolymer preparation; structure characterization; thermal stability; brines solution. Abstract. The copolymer (AM-co-NVP) of acrylamide (AM) and vinyl pyrrolidone (NVP) was carried out in the presence of 2,2'-azobis[2-methylpropionamidine] dihydrochloride（V50）as initiator by free radical polymerization. The copolymer was characterized by its chemical structure with Fourier transform infrared spectroscopy (FTIR). The heat resistance of AM-co-NVP at 100°C and 120°C in harsh saline solution with high mineralized concentration ranging from 5×104 mg/L to 20×104 mg/L containing 2.5% (mass ratio) CaCl2, 2.5% (mass ratio) MgCl2 and 95% NaCl (mass ratio) was investigated. The experimental results indicate that AM-co-NVP has excellent thermal stability in saline solution compared to partially hydrolyzed polyacrylamide (HPAM). What is more, the copolymer exhibited the most perfect thermal tolerance in high divalent saline solution when the feed molar ratio of AM and NVP is 91.5 to 8.5. The microstructures of the copolymer samples after thermal aging in hostile environment captured by scanning electron microscope (SEM）further proved the NVP monomer was effectively introduced leading to the copolymer favorable heat stability in particularly high mineralized solution.
Template Synthesis to Fabrication of 3D Ordered Hierarchical Materials
Authors: Yang Ren Chun , Ma Feng Yun , Tang Ding Xing
Published: December 2012

To construct 3D ordered hierarchical materials, Si, Al and Ti colloids precursors were controlled prepared via dual template method in which the colloidal crystals and P123 acted as hard-template and soft-template, respectively. The results showed that ordered hierarchical SiO2, Al2O3 and TiO2 were successfully prepared. The difference of the structure of samples suggested that hydrolysis rate of the precursors play an important role on pore structure of the samples.
Study on Simulation of Nitrobenzene Distillation Using Dividing Wall Column
Authors: Wang Er Qiang , Huang Jin Cheng , He Yu Jian , Li Cheng Yue
Published: December 2012

In this paper, application of DWC with side rectifier (DWC-SR) to nitrobenzene distillation was studied. Simulation using Aspen plus software was done to compare the traditional two tower process with new process based on DWC-SR. The results show that, the two processes has almost no difference on the energy cost, which is also decided by the characteristic of DWC-SR, but large saving of capital investment and space can be obtained. In addition, only a reboiler is need in DWC-SR process, residence time of nitrobenzene, dinitrobenzene, etc inside high temperature region can be reduced, so can to avoid the frequently occurring explosion accident to a great extent.
Investigation of Low-Cost Copper Interconnection Cleaning Using Hydrogen Radicals Generated by Heated Catalyst
Authors: Kumashiro Y. , Ikeda S. , Izumi Akira
Published: December 2012

We investigated hydrogen radical copper cleaning via the hot-wire method using only a rotary pump for the vacuum exhaust system. The copper oxide surface was successfully reduced. The treatment also increased the resistance of copper to oxidation.
Study on Preparation of Modified Ti-Based Lead Dioxide Electrode and Degraded Methylene Blue
Authors: Zhu Xue Jun , Deng Jun , Gou Fang Ming
Published: December 2012

A modified electrode was prepared by the electrodeposition of a lead oxide layer on a titanium substrate. Characterize the electrochemical performance of electrode by adopting CHI860D electrochemistry workstation while evaluating the electro-catalytic performance of electrode with Methylene Blue (MB for short) solution as target degradation product. The results show that the interlayer proportion of SnCl4:SbCl3 is 6:1 when the thermal decomposition temperature is 550°C, the electrode material prepared in plating solution with a concentration of 0.15mol/L has excellent electrocatalytic performance against MB, and the degradation rate could reach above 98%.
The Purification and Analysis of 6 - Hydroxy -2 - Naphthoic Acid
Authors: Song Yuan Jun , Zhang Chun , Li Jing Jing
Published: December 2012

When synthetizing 2 - hydroxy - 6 - naphthoic acid with 2 - naphthol as raw material , we use a variety of methods to characterize and analyze the intermediates and target product . Through melting point method, the melting point of HNA we synthetized is showed to be slightly lower than standard samples. High performance liquid chromatographic shows that the purity of 2 - methoxy - 6 - naphthoic acid 2 - hydroxy - 6 - naphthoic acid reach up to 81.98% and 99.0% respectively. The purity of 2-hydroxyl-6-naphthoic acid is showed to be 97.1% with ultraviolet spectrophotometry.