bluuebunny/crossref_metadata_2025 huggingface dataset:
Research on the Corrosion Resistance of Manganese Slag Cement Stabilized Macadam Base
Authors: Qin Feng , He Zhuang Bin , Huang Qiong Nian
Published: July 2011

In this study, the unconfined compressive strength and anti-corrosion capacity and erosion resistibility were evaluated. Different admixture amounts of manganese slag cement were used as constituents of stabilized macadam base specimens. On the prepared specimens mechanical property test、continuous immersion experiment and anti erosion experiment were carried out for the research on the corrosion resistance of manganese slag cement stabilized macadam base. It was observed that corrosion resistance and scour resistance performances were significantly improved with the incorporation of manganese. The performance of corrosion resistance reduce after first enhance when slag manganese slag cement stabilized macadam base are marinated with acid rain. During continuous acid rain marinate, the anti-corrosion capacity is improved on the first 21day, but it is observed declined rapidly after 21day acid rain marinate and finally manganese slag cement stabilized macadam base is lose its workability because of full corrosion.
Exploration on the Integration of Residential Communities and Agricultural Landscapes in Xi’an
Authors: Yu Jun Hua , Zhu Yan Di , Zhang Lan
Published: July 2011

With the urbanization increasingly advancing at high speed, a growing number of farmlands have been turned into building lands, which leads the urban-rural conflicts more and more evident than before. However, integrating residential landscapes design with ecological agriculture could relieve the contradiction of booming population and decreasing farmlands, improve the modern lifestyle and afford more optimized land using pattern under the circumstance of greatly advocating resource-saving society. Taking Xi’an area as an example, and based on the green ecological design, social benefits and the harmony between social development and our living environment, the paper analyzes the advantages and disadvantages of modern environmental design, and explores the comprehensive strategies of agricultural landscape design in residential communities which could meet the people’s demands in many aspects such as usage, entertainment and esthetics.
Study on Low-Carbon and Energy-Saving New Rural Countryside Construction in the Northeast of China
Authors: Xu Da Ming , Zhao Tian Yu , Cheng Wen
Published: July 2011

In this paper, with the purpose of constructing the low-carbon and energy-saving new rural countryside, we regarded the cold region in the Northeast of China as the research object, with analyzing the energy consumption structure and patterns and the main problems of planning and construction in countryside, we proposed planning technology measures and building programs considering selection of topography, design and layout , division of the functional region within the towns and villages, encouragements to build the row of houses, construction of multiple windbreaks, exploration of the energy from rural production and living waste and development of the new energy of solar, biogas, wind and other energy to adapt the character of cold climate.
Northeast China Rural Residential Passive Solar Design Exploration
Authors: Qiu Ju , Liu Hong Ming
Published: July 2011

The promotion and utilization of passive solar technology in Northeast China rural residential constructions which locate in harsh cold climate and underdeveloped economy regions has great advantages and feasibility. Through the regional environmental analysis, this paper launched the Northeast China rural residential passive solar design exploration from the aspects of plan design, residence orientation selection, wall, roof, window and others. By the prerequisite of minimizing the increase in building cost, it provides technical supports for passive solar further applications in Northeast China rural residence.
Research and Application on Magnesium Slag
Authors: Wang Si Yu , Xiao Li Guang , Zhou Qiang , Xu Kai , Chen Bao Li , Wang Ji Feng , Wu Zhi Zhong
Published: July 2011

The content of water glass in accordance with the size of range is a major factor in magnesium slag strength. The microstructure of the block of orthogonal testing three shows network-like, acicular, cotton wool attached to each other, the main hydration products are calcium silicate hydrate, needle-like ettringite and CSH gel, just the good combination among the hydration products the cementitious material get the ideal strength value. From the view of differential analysis curve, Ca (OH) 2 decomposed when the temperature reaches 500 °C -540 °C, Ca (OH) 2 generated by the calcium component within the cementitious material reaction with alkali, and the Ca (OH) 2 will participate in the reaction of hydrated calcium silicate gel, and enhance strength of the test block. From the TG thermal analysis we can see that there is no water loss in the process, the performance of ofmineral phase changes and thermal stability are great.
Impact of Rubber Particles on Heat-Shielding Property of Bridge Deck Pavement
Authors: Tian Shuai , Zhang Tong , Li Wei Feng
Published: July 2011

The paper studied the impact of rubber particles on heat-shielding property of bridge deck pavement. Results of the research show: when mixed with rubber particles in 4% concrete of bridge deck pavement performs well in dynamic test, heat-conducting test, thermal expansion and thermal contraction test; it is feasible to utilize rubber particles in 4% to solve solar radiation thermal effect on concrete bridge; to mix rubber particles in 4% with concrete as bridge deck pavement can decline solar radiation thermal effect on concrete bridge by more than 20%, so the diseases from thermal sudden change can be reduced.
A Review of Construction Waste Treatment in China
Authors: Zhu Lian Bo , Hao Wei
Published: July 2011

China is one of the countries with the most amounts of new buildings in the world each year. The number of the construction waste has already accounted for 30% to 40% of the total city garbage. So it is necessary to study the construction waste treatments. There are many research results in recent years. These results can be divided into three parts, which are the policy studies, the management mechanism and the techniques of the construction waste treatments. The paper discusses and analyses them. Based these research results the paper gets the conclusion that three aspects should continue to be studied, which is the unified calculation formula of the construction waste quantity, the construction waste industrialization and the support and incentive mechanism research.
On Natural Coloration of Concrete in Power Plant Construction
Authors: Huang Ji Qian , Xu Yang
Published: July 2011

The concrete coloration method for the power plant construction is studied to change the recent exterior decoration method for industrial buildings, for its considerable charge on construction and maintenance. The special low-carbon additive, rice husk ash, is provided as the coloring matter to produce a grey with different saturations. After that, various professional tests on uniformity, impermeability and frost resistance are provided to illustrate the performance of the colored concrete. As the result, the proposed concrete coloration scheme has improved the industrial architectural appearance without sacrifice the strength of structure. More importantly, it is meaningful and significant to promote the environment landscape with green environmental protection destination by using the low-carbon materials in our industrial construction.
Preparation of Polyaniline Nanotubes and its Electrocatalytic Behaviors
Authors: Tao Fei Fei , Li Chun Qing
Published: July 2011

In this paper, we have successfully synthesized polyaniline nanotubes by using chemical oxidation polymerization. This synthesis is simple and an effective way to prepare one-dimensional polymer nanotubes. By transmission electron microscope (TEM), X-ray diffraction (XRD) and Fourier transform infrared spectrum (FTIR), the morphology and physical structures of the as-prepared products were characterized. By cyclic voltammetry we studied the electrocatalytic activity of polyaniline nanotube modified glassy carbon electrode on ascorbic acid. The results show that the polyaniline nanotube modified electrode has excellent electrocatalytic activity on ascorbic acid. Compared with those of the bare glassy carbon electrode, the anodic peak potential of ascorbic acid shifts negatively 0.212 V on the modified electrode, and the anodic peak current increases 43 %. And the concentration of ascorbic acid shows a good linear relation at the range of 1.0×10-5~ 0.1 M with the minimum detection limit of 1.0 × 10-6M.
Current Situation and Main Pollution Sources of Rural Water Environment in China
Authors: Liu Zhen Hua
Published: July 2011

Pollution of surface water in rural areas in china remained serious, analysis the main pollution sources. Figure. 1 shows that the average concentration of COD from township enterprises was about two times the national average. Figure. 2 and figure. 3 shows that amount of fertilizers and pesticides use basically increases year by year and annually are enormous. Agricultural pollution is more serious than industrial pollution,untreated domestic sources of pollution and livestock breeding were harm to water environment in rural areas.
Biodegradability of Acrylic Retanning Agent DT-R548 with Medium and Large Relative Molecular Weight
Authors: Wang Xue Chuan , Fu Yu Qiao , Ren Long Fang , Qiang Tao Tao
Published: July 2011

The methods of respiratory curve and COD30 were adopted to evaluate the biodegradability of acrylic retanning agent DT-R548 with medium and large relative molecular weight, which was used as the substrate of microorganism. The main results obtained by the method of respiratory curves were as follows. When the concentration of substrate was 0~3000mg/L, the respiratory curves of the substrate were under the curve of endogenous, which showed that the substrate has inhabiting effect on microorganism. When the concentration of the substrate was 1500mg/L, the utilization of the substrate by microorganism was the most. The main results obtained by the method of COD30 were as follows. When sludge concentration was 1000mg/L and pH was 7, the biodegradation rate of 1500mg/L DT-R548 was 19.74%. Under above condition, the biodegradation rates of DT-R548 with other concentrations were much smaller. Moreover, as indicated in the respiratory curves, the effect of sludge concentration, pH, salinity and co-metabolism on the biodegradability of the substrate was obvious. Under the experimental conditions, when the concentration of the substrate was 1500mg/L, the sludge concentration was 3000mg/L, pH was 7.5 and salinity was 0.5%, the biodegradability of the substrate was the best. The glucose was as co-metabolism substrate and when its concentration was 600mg/L, the biodegradability of the substrate was obviously increased.
The Optimization Model of Eye Sickbed Reasonable Arrangement
Authors: Liu Jie Fang
Published: July 2011

In this paper, we consider the problem of the use of hospital beds. According to the actual situation of patient’s psychological, we analyzed the factors that influenced the hospital beds arrangement and patient’s psychological. Then we built the optimization model. This model concerned the following factors such as reasonable allocation patients, arrangement, bed utilization of the hospital and the turnover. Before modeling of original data we do the following preparation: the processing of data classification, the disease is divided into five different type of case, namely cataract, cataract (eyes), glaucoma, retinal disease, trauma to guarantee the requirements of different diseases. We used excel, MATLAB to calculation different type of disease hospital patients, and discharge time, waiting time for one time and so on, and then analysis the data that needed. At last, we get satisfactory conclusion.
Variation of TTC-ETS Activity of Activated Sludge in SBR Process
Authors: Wang Jian Hui , Yin Jun , Song Wei Hua , Lin Ying Zi , Yu Xiao Lin
Published: July 2011

Changing rule and activity status of biological activity of activated sludge in SBR process were studied by the determination of TTC-ETS activity. The results indicate that TTC-ETS activity can reflect effectively the biochemical reaction course of SBR process. Biological activity of organic matter biodegradation, nitrification and denitrification course in SBR process is reduced in order. Operational conditions cannot influence the changing rule of TTC-ETS activity, but the time of the appearance of break points marking different reaction course in profile and the average biological activity are influenced.
Effects of Natural Organic Acids on Growth of Maize and Uptake of Chromium by Maize in Chromium Contaminated Soil
Authors: Cheng Guo Ling , Ma Zhi Fei , Wang Qun Hui
Published: July 2011

Seven natural organic acids were added to moderate artiﬁcial Cr-contaminated soil to investigate the effects of natural organic acids on growth of maize and phytoextraction of chromium by maize. The results showed that most organic acids promoted the height growth of maize except for humic acid in Cr-contaminated soil. The total dry weight increased only with oxalic acid treatment. The natural organic acids can change the dry matter distribution of the shoot and the root. The total uptake of chromium by the shoots of maize showed the highest with citric acid treatment (p<0.01), followed by succinic acid, tartaric acid and malic acid treatment, indicate that citric acid has the potential to be used for phytoremediation of Cr-contaminated soil.
Influence of Water Physical and Chemical Performance by Magnetizing
Authors: Yin Jun , Zhang Ju Kui , Wu Lei , Li Xin
Published: July 2011

Choose three kinds of clean drinking water distilled water, tap water, mineral water for the object, study the impact of magnetization on water’s conductivity, pH value, ORP and the solubility of insoluble salts by experiment of magnetic field intensity 500mT and different time, the results showed that magnetic treatment can improve the conductivity, pH of three kinds of water samples, lower ORP value, and has a certain significance on human health, but it is limited in improve the solubility of insoluble salts with the characterization of calcium carbonate.
Study on Regional Water Environment Carrying Capacity during the Process of Urbanization - A Case in Jining City
Authors: Li Na , Wang La Chun
Published: July 2011

The regional water environment carrying capacity (WECC) is defined as the bearing capacity of water environment for human activity in a certain state, a region and a time, reflecting the coordination between regional water environment and socio-economic development. Using the fuzzy comprehensive assessment principle, on the based of determining the weight of each index and the classification standard of index, the paper evaluated the water environment carrying capacity of Jining City form 2007~2009. The results show that the water environment carrying capacity of Jining City is still at a relatively low level, and remains to be improved further, which should provide scientific basis for the regional water management and sustainable development strategies.
Study on Dynamics Model of Biodegration Property of Organic Matter in Aerobic Thermophilic Composting Reactor for Sanitary Disposal of Human Feces
Authors: Bai Fan , Wang Xiao Chang
Published: July 2011

Aerobic composting is a method for sanitary disposal of human feces as has been used in bio-toilet systems. In this study, batch experiments were conducted using a closed aerobic composting reactor with sawdust as the bulky matrix to simulate the condition of a bio-toilet for sanitary disposal of human feces. Attention was paid to the Biodegration property of organic matter. Under a controlled condition of temperature(60°C), moisture content(60%), and continuous air supply, more than 70% fecal organic removal was obtained in a two-week composting period. Based on assumptions that the organic matter of feces was invided into two parts included degradation and undegradation, the organic matter’s biochemical degradation of similar level 1 dynamics model can build. Using the experimental data of composting reaction under thermophilic composting conditions, calculated out respectively reaction kinetics constants 0.4413. Thermophilic composting could be considered to reach more than 70% fecal organic removal, shortening maturity period of compost. The similar level 1 dynamics model improve design of composting reactor and use of bio-toilet.
Adsorption of Chlorimuron-Ethyl on Two Typical Chinese Soils as Affected by Cd
Authors: Qu Xiang Rong
Published: July 2011

Coexistence of chlorimuron-ethyl and Cd is very common in Chinese soils. Adsorption of chlorimuron-ethyl and Cd on soils strongly affects their mobility. This study was conducted to investigate the effect of Cd on the adsorption of chlorimuron-ethyl on two typical Chinese soils, brown earth (BE) and black soil (BS). Batch equilibration methods were applied. The presence of Cd enhanced the adsorption of chlorimuron-ethyl on BE and BS, which resulted from the decrease of equilibrium solution pH caused by Cd2+ exchange with H+ ions of soil surface. Besides that, chlorimuron-ethyl adsorption possibly takes place on sites where Cd was previously adsorbed and the adsorbed Cd acted as a bridge between the soil and chlorimuron-ethyl. Such results suggested that Cd in field may decrease the mobility and bioavailability of chlorimuron-ethyl and correspondingly decrease its environmental risk.
On the Habitation Water Environment in New Rural Construction - Based on a Survey of the Certain Area
Authors: Liu Guo Xun
Published: July 2011

Through the studying a typical area and investigating, the authors focus on the water environment in rural residential areas. Problems related to it even have been the core of the new rural construction. Mainly they are: Water environment within rural settlements in serious deterioration, Modification of the capacity declining and Isolated to the irrigation system. Some suggestions are also put forward to these problems. Something must be done to ameliorate and improve the water environment of the residential area in rural region.
Matlab for Forecasting of Energy Consumption Based on BP Neural Network
Authors: Tu Chang Huan , Li Guo You , Zhao Liang
Published: July 2011

The paper used Matlab to program for single-layer BP neural network, selected the annual energy consumption data as the training sample and inspection sample to train BP neural network, then, predict the future China's energy consumption quantity.
Study on the Curing Process of Allyl Phenol-Formaldehyde Resin
Authors: Liu Yang , Yu Jing Kun
Published: July 2011

Allyl phenol-formaldehyde (APF) resin was synthesized by using phenol-formaldehyde (PF) resin and allyl chloride as raw materials and sodium hydroxide as alkali catalyst, and its curing process was investigated. The results showed that APF could not only dissolve in polar solvents, but also dissolve in nonpolar solvent. The APF started curing from around 180°C, and it was higher than PF. The curing took place by polyaddition at allyl double bonds, and a wider controllable curing range of 44°C was obtained. The cured surface of the matrix manifested a continuous phase.
Analysis of Testicular Toxicity of Solanine in Mice
Authors: Ji Yu Bin , Sun Jing Chao , Lang Lang
Published: July 2011

Solanine is one of chemicalcomponents in the tuber and the sprout of the potato which is toxic to human. Some studies on the toxicity of solanine on humans and animals have been reported, little is known about the mechanism of its testicular toxicity. In present study, the toxicity of solanine on male reproductive function was investigated in adult male Kunming mice. Compared with the control group, there was an obvious pathological change in testis, and the expression levels of 3β-HSD and vimentin decreased when the test concentration of solanine was at 21 mg/kg/day. Meanwhile, there was a significant dose- and duration-dependent reduction in the testicular weight and organ coefficient. However, no changes have been detected about the level of testosterone and there was a dramatic increase in the expression of LH in Leydig cells. Results of this study suggested that solanine leaded to male reproductive toxicity influencing the functions of Sertoli cells and Leydig cells.
Study on Capparis spionosa L. Polysaccharide (CSPS) Induced HepG2 Apoptosis by Controlling Ca2+ Path
Authors: Ji Yu Bin , Dong Fang , Gao Shi Yong , Yu Miao
Published: July 2011

To investigate the mechanism on Capparis spionosa L polysaccharide(CSPS) inducing apoptosis in HepG2 human hepatoma cell. MTT was ddopted to determine if CSPS had cytotoxic effect on HepG2. Morphology of HepG2 changed with dosages of CSPS was detected by laser confocal scanning microscope. Flow cytometry(FCM) was used to detect the apoptosis by PI labeling method. Calcium, mitochondrial membrane potential, Bcl-2/Bax of HepG2 cells were detected by laser confocal scanning microscope. The result of MTT showed that CSPS could inhibit the growth of HepG2 significantly. HepG2 cells were shrinkage, fragmentation, appearance of apoptotic bodies by laser confocal scanning microscope. HepG2 cell apoptosis rate was increased gradually with dosage by FCM. Calcium concentration, mitochondrial membrane potential, Bcl-2 protein of HepG2 were decreased, Bax protein content of HepG2 was increased by laser confocal scanning microscope. CSPS induced HepG2 apoptosis by controlling Bax/Bcl-2 in Ca2+ path.
Research on Software Aggregation to Service Aggregation
Authors: Xu Wen Jin
Published: July 2011

In this paper, software aggregation and service aggregation are introduced. The aggregation process is described from single node to make them re-link in different forms. The purpose of aggregation is presented, and then the paper leads to service aggregation of high form of amounts of energy that can not be imagined at the beginning. With the importance of the service aggregation, the technical process and guideline of the transformation from software aggregation to service aggregation is presented.
Solid-Liquid Reaction Synthesis and Characterization of Bioinorganic Complexes of Nicotinic Acid with Antimony(III) and Bismuth(III) Ion
Authors: Zhong Guo Qing , Gu Mei , Zhang Yan
Published: July 2011

Bioinorganic complexes of nicotinic acid with trivalent antimony and bismuth are synthesized by solid-liquid reaction at room temperature. The formula of the complexes is Sb(C5H4NCOOH)2Cl3•H2O and Bi(C5H4NCOOH)2Cl3•H2O respectively. The crystal structure of the complex of nicotinic acid and Sb(III) belongs to triclinic system and that of nicotinic acid and Bi(III) belongs to monoclinic system. Thermal analysis can indicate the complex formation between antimony or bismuth ion and nicotinic acid.
Research on a High Accuracy Method for Solving Parabolic Equations Based on Analysis of Scientific Materials
Authors: Li Guo Cheng
Published: July 2011

In this paper, one-dimensional parabolic equations is studied .A high accuracy method for solving one-dimensional parabolic equations is structured by choosing suitable parameters, its accuracy is better-then- third-order in time and space direction.
Correlation between Clinicopathology and Immunolocalization of Heat Shock Protein 72 and Glycoprotein 96 in Human Hepatocellular Carcinomas
Authors: Wang Xiao Ping , Lin Huan Ping , Wang Qiao Xia
Published: July 2011

Heat shock protein 72 (HSP72) and glycoprotein 96 (gp96) are highly expressed in cancer tissues. Recent studies indicate the possible roles of HSP72 and gp96 in the development and progression of gastrointestinal carcinomas but detailed information is still ambiguous. The aim of the study is to investigate the correlation between clinicopathology and immunolocalization of HSP72 and gp96 in human hepatocellular carcinoma. Immunohistochemistry demonstrated that HSP72 and gp96 expression in hepatocellular carcinomas with metastasis was significantly higher than those with non-metastasis. HSP72 and gp96 expression were significantly associated with the presence of tumor infiltration, lymph node and remote metastasis.
The Study of Sports Dance Teaching Methods in the Multimedia Environment Based on Dancing Materials
Authors: Liu Hao
Published: July 2011

After consulting a large number of literature and experts, survey to the present situation of sports dance teaching methods that P.E. teachers used in the senior high school is not efficient. The author is deeply impressed that sports dance teaching in the multimedia environment provides conditions for students to establish action representation, arouse students' learning passion and enthusiasm, emphasize students` subjective dynamic role and cultivate students' self-confidence to complete the right technology action with the strong will and the ability. This paper raises that sports dance teacher should choose the best way which can achieve the teaching purpose and finish the teaching task in terms of the different teaching content stages and different levels of students， compounding the traditional and advanced multimedia technology organically. This study provides the theoretical basis and method reference in order to promote common college sports dance teaching method theory and teaching practice.
Efficient Convertible User Designating Confirmer Partially Blind Signature with Provable Security
Authors: Ma Li Zhen
Published: July 2011

Any one who knows the signer’s public key can verify the validity of a given signature in partially blind signature schemes. This verifying universality may be used by cheats if the signed message is sensitive or personal. To solve this problem, a new convertible user designating confirmer partially blind signature, in which only the designated confirmer (designated by the user) and the user can verify and confirm the validity of given signatures and convert given signatures into publicly verifiable ones, is proposed. Compared with Huang et al.’s scheme, the signature size is shortened about 25% and the computation quantity is reduced about 36% in the proposed scheme. Under random oracle model and intractability of Discrete Logarithm Problem the proposed scheme is provably secure.
Research on Bayesian Model Averaging for Lasso Based on Analysis of Scientific Materials
Authors: Guo Ao Tuo
Published: July 2011

The Lasso (least absolute shrinkage and selection operator) estimates a vector of regression coeﬃcients by minimizing the residual sum of squares subject to a constraint on the -norm of coeﬃcient vector, which has been an attractive technique for regularization and variable selection. In this paper, we study the Bayesian Model Averaging(BMA) for Lasso, which accounts for the uncertainty about the best model to choose by averaging over multiple models. Experimental results on simulated data show that BMA has signiﬁcant advantage over the model selection method based on Bayesian information criterion (BIC).
An Empirical Study on Impact of Economic Development to Environmental Pollution in China
Authors: Chen Jian Bao , Duan Jing Hui , Chen Xie Bin
Published: July 2011

By using non-parametric additive panel model, this paper empirically studied the impact of economic development to environmental pollution in China. Our research results are summarized as follows: The relationship between environmental pollutants and economic variables including the industrial structure, technological level and pollution control show mostly inverted U shapes or inverted N shapes.
Identifying Transition Rates of Ion Channels with One Loop
Authors: Xiang Xu Yan , Liu Li Fang , Chen Ye
Published: July 2011

The constrained equations between transition rates and the derivative of open lifetime and shut lifetime distribution for a given state set of Markov Chain are provided. For gating scheme of ion channels with one loop, it is derived by those underlying information that all transition rates can be identified by their open and shut lifetime distributions at state 0 and any other two adjacent states.
Effect of Extract from Lactarius vellereus Fermentation Liquid on Antioxidant Enzymes Activities of Alternaria alternata K.
Authors: Ji Hong Fang , Zhang Ling Wen , Cheng Fang Yuan , Wang Ling Yu , Jin Hui Hui , Song Rui Qing
Published: July 2011

The influences of extract from Lactarius vellereus fermentation liquid on antioxidant enzymes activity of Alternaria alternata K. were evaluated. Results showed that, in treatment group, the activities of SOD, CAT and POD in mycelia of A. alternata increased at prophase, and SOD activity increased to maximum (31.562 U·g-1) at 5h, while both CAT and POD activity increased to maximum (0.041U·g-1·s-1 and 5.531U·g-1·min-1, respectively) after being administered with 10h. The activities of these three enzymes treated with extract decreased rapidly at anaphase and down to the minimum (0.828 U·g-1, 0.012 U·g-1·s-1, and 0 U·g-1·min-1, respectively) at 40h. While, in control group, SOD, CAT and POD activity always increased with treatment time prolonged. The activity of SOD, CAT and POD was affected byLactarius vellereus fermentation liquid extract so that it led to dysfunction of the free radical scavenging system. This might be one of the mechanisms that the extract inhibits the growth of A. alternata.
Effect of Chroogomphis Rutillus Extracts on Activity of Nitrite Scavenging and Nitrosamine Formation Inhibition
Authors: Ji Hong Fang , Zhang Ling Wen , Jin Hui Hui , Wang Ling Yu , Cheng Fang Yuan , Sun Ke Xiang
Published: July 2011

Chroogomphis rutillus extracts were prepared with solvent of petroleum ether, acetic ester, methanol and water. The effects of four different extract on nitrite scavenging (NS) and nitrosamine formation inhibiting (NFI) were evaluated in vitro systems. Results showed that all the extract showed NS and NFI potentials with a dose-dependent manner. With regard to NS activity, at 50μg/mL, the scavenging rates of ethyl acetate and methanol extracts were 96.65% and 93.48%, respectively. While, those of petroleum ether and water extract were only 86.96% and 26.09%, respectively. With regard to NFI activity, at 200μg/mL, both petroleum ether and ethyl acetate extracts showed excellent inhibition abilities of 94.46% and 91.33%, respectively, much higher than those of methanol and water extract (78.57% and 4.06%, respectively) (P<0.05). Chroogomphis rutillus especially ethyl acetate extract may have a preventive effect against carcinogenesis induced by nitrosamines.
The Research of Social Intelligence Network (SIN) in Crisis Management of Fund Management Corporations
Authors: Yang Fu Rong
Published: July 2011

According to the information needs in fund industry, fund management companies can determine sources of information on the crisis, select far-reaching nodes, and establish effective links for the fund management companies to build social intelligence network to deal with credit crisis.
Study of E-Commerce Sites Customer Segmentation Based on Comprehensive Model
Authors: Ma Hai Ying
Published: July 2011

Nowadays, with the rapid development of technology and the rapid popularization of Internet applications, many Chinese businesses are attracted by huge profits and market space of e-commerce, beginning to join the area of e-commerce. How to keep effective customer, attract more members of the e-commerce website and expand the market effectively, is the problem that all the managers most concerned about. Through studying and comparing common customer segmentation models, this article is proposing a integrated model that combines the techniques of generalized association rules and decision tree. This model is used for customer segmentation for e-commerce websites. It can help managers understand customers, develop markets, and support decision-making.
Performances Comparison of Different Solar Desalination Processes by Bubbling Humidification
Authors: Zhang Li Xi , Gao Shi Yuan , Chen Wen Bin
Published: July 2011

Basing on the experiment and design data of the two solar desalination systems by bubbling humidification, the GOR (gain output ratio), R (electric power consumption of unit freshwater output) and C (freshwater production cost) are calculated and compared. It's obtained when the humidifying temperature is increased, GOR is increased, while R and C are decreased; if the humidifying temperature increased by 10°C, C would be reduced by half. The electric power consumptions of the systems mainly depend on the blower’s consumption, while the electric power consumed by seawater pumps is little. It is the guide and basis for reducing the freshwater production cost and further improving the rationality of process.
Spatial Data Mining Based on Campus GIS
Authors: Yu Yong Ling , Guan Tao , Shi Jin Fa
Published: July 2011

With the rapid development of spatial database technology, spatial databases have been widely used in many engineering fields and rapidly increase in data capacity. Thus, to mine useful information from large spatial databases turns into a difficult but important task. In this paper, we apply the traditional data mining into spatial database and give a mining model for spatial data based on Campus GIS. Moreover, based on campus GIS, we implement a spatial data mining prototype system that is able to discovery the useful spatial features and patterns in spatial databases. The application in the campus GIS of a university has shown the feasibility and validity of the system.
An Intelligent Control System of Candy Production Process
Authors: Zhang Jia Liang , Li Bei Zhi , Yang Jian Guo , Chen Han Yan
Published: July 2011

Candy production processes involve many process variables. Operators often find it difficult to effectively monitor the process data, analyze current states, detect and diagnose process anomalies, and take appropriate actions to control the processes. The objective of this work is to develop an intelligent control system of candy production process to improve final candy quality and to increase production efficiency with good human-machine interfaces. The study is conducted by using virtual instrument, multi-sensor data fusion and fuzzy control technology to online detect and control typical parameters. Experiment results show that this system can reach requirements of processing accuracy and real-time property and is highly cost-efficient and practical.
Visualization Service Model for Job Scheduling
Authors: Yu Yong Ling , Guan Tao , Shi Jin Fa
Published: July 2011

With the expansion of manufacturing information services, visualization service in enterprise resource planning has recently become a hot topic. In this paper, we propose a new approach for job scheduling visualization service and a model of visualization service constructed from the share of production data and job scheduling information. Moreover, the optimization model of visualization service is given. At last, we discuss the optimization algorithm for this model.
Automatic PMD Compensation Based on GTPSO Algorithm in Optical Fiber Communication Systems
Authors: Zhang Jin Nan , Tao Jin Jing , Zhang Yang An
Published: July 2011

We demonstrate a universal DSP application for adaptive polarization mode compensation (PMD) compensation utilizing GTPSO algorithm in optical transmission systems. An adaptive PMD compensation experiment is implemented in an 80G/s DQPSK system. We designed a low power-consume DSP-based integrated control system to complete first-order PMD and second-order PMD compensation. The searching process and the tracking process for automatic PMD compensation could be completed in less than 10ms and 1ms.
Facile Solvothermal Route to Synthesize Indium Tin Oxide Nano-Plates, Nanoparticles and Nanorods
Authors: Cheng Ya Juan , Duan Xue Chen , Liu Yang Lin , Jiang Bo , Xiao Gui Ying , Zhou Zhi Chao
Published: July 2011

Indium tin oxide (ITO) nanopowders with high crystalline were synthesized by a simple solvothermal method with isopropanol as the selected solvent. X-ray diffraction was employed to characterize the crystal structure and crystalline size while the effect of the reaction time on morphologies was studied by FE-SEM. The results revealed that, with the increase of solvothermal time, the morphologies were evolved gradually from porous plates with high specific surface area to rods with narrow diameter distribution. The solvothermal time has little effect on crystalline size, which is 18nm approximately for all the samples. With the increase of solvothermal time, the electric conductivity decreases slightly first and then increases greatly. The possible mechanisms for the effect of solvothermal time on ITO powder morphologies and electric conductivity are proposed.
Determination of IMC-80BH Corrosion Inhibitor Concentration and Practical Application in Gas Field
Authors: Fan Zheng , Li Wen Hong , Li Dong , Liu Cun Ju , Luo Yu , Li Lin , Sun Jing
Published: July 2011

The ability of IMC-80BH corrosion inhibitor is proven to be excellent in earlier indoor static and flowing evaluation and it is worthwhile to determine the inhibitor concentration to maintain the optimum concentration for the sake of effective gas well protection. A improved concentration determination method is aboratively investigated. The maximum absorption wavelengths, buffer solution, reaction time and additive dosage of chromogenic reagent XD are detected successively and the standard curve of liquid phase behaves better than oil gas. The sample verification demonstrates that such determination measurement is reliable and precise. The four representative gas wells including G8-7, S59, W26-5 and G49-6 in service are also determined. The determination result offered substantial basis to analyze and select appropriate inhibitor injection program and dosage.
Effect of Cooling Rates after Finish Rolling on Microstructure and Properties of Microalloyed Steels Used for Fracture Splitting Con-Rods
Authors: Zhang Xian Zhong , Zhou Gui Feng , Chen Qing Feng , Xiong Yu Zhang
Published: July 2011

The effect of cooling rates after finish rolling on microstructure and properties of high strength medium carbon microalloyed steels used for fracture splitting con-rods was investigated using the methods of optical microscopy, SEM and TEM, etc. The results show that high cooling rate after finish rolling can increase the percentage of pearlite, reduce the grain size of ferrite and lamellar spacing of pearlite. The precipitations in the steel are composite phases of (V,Ti)(C,N), etc. Their granularity are about 30-170nm, and they will decrease with the speeding up cooling. The yield strength (YS) and ultimate tensile strength (UTS) are improved with increasing the cooling rate. The impact fracture surface shows distinct brittle fracture character.
Thermodynamic Analysis on Precipitation of Nonmetallic Inclusions in Gear Steel
Authors: Chen Yong , Chen Tian Ming , Wang Xin Hua , Chen Jun
Published: July 2011

In order to make nonmetallic inclusions with low melting point and improve the fatigue resistance of gear steel, thermodynamic analysis on precipitation of nonmetallic inclusions CaO(MgO)-Al2O3 system was investigated in this paper. The complex deoxidation equilibria of strong deoxidizing elements such as aluminum, calcium, magnesium and so on were calculated accurately with the second order and middle term of the activity coefficient expression. Thermodynamic conditions for the precipitation of spinel inclusion (MgO•Al2O3) is sufficient as the acid-soluble aluminum content is 0.04% and magnesium content is less than 0.0005% in the tested gear steel 20CrMoH. The relationship between precipitation of spinel and calcium aluminate inclusions in gear steel and the composition of molten steel at 1873K indicates that, the compositions of inclusions before and after calcium treatment are C12A7 and C3A respectively, while the reactions in ladle reach the equilibrium state.
Fabrication of Electroconductive Si3N4–TiN Ceramic from Iron Ore Tailing
Authors: Zhang Shu Hui , Kang Zhi Qiang , Lü Qing , Li Jie , Liu Xiao Jie
Published: July 2011

Electroconductive Si3N4–TiN ceramic was fabricated by pressureless sintering from the chief materials containing high titanium slag and Si3N4 powder synthesized by carbonthermal reduction nitridation method using iron ore tailing as raw materials. Phase constitutes and microstructure were analyzed by XRD and SEM. The densification, mechanical properties and electrical conductivity of Si3N4–TiN ceramic were also measured. Results show that the sintered samples mainly consist of Si3N4 and TiN. Si3N4 exhibits rod morphology and the grain sizes are about 1-3mm.TiN shows fine granular morphology with most of grain size being lower than 0.5mm. The electroconductive Si3N4–TiN ceramic has optimal properties when it is sintered at 1550°C for 2h using initial raw materials containing 20wt% TiO2. The sintered sample’s bulk density, hardness, flexure strength and room electrical resistivity are 2.79 g·cm-3, 8.23GPa, 66 MPa and 7.1×10-2W·cm, respectively.
Physical Modeling of Fluid Flow Characteristics in a Delta Shaped, Four-Strand Continuous Casting Tundish with Different Flow Control Devices
Authors: Chen Chao , Cheng Guo Guang , Yang Hai Kuo , Hou Zi Bing
Published: July 2011

Physical modeling using a 1:3 scale model was carried out to study the fluid flow characteristics in a delta shaped, four-strand continuous casting tundish with different types of flow control devices (FCD). The symmetric baffle with inclined holes (II shaped from top view) was not suitable in this study, while the U shaped baffle with inclined holes was suggested for the integrated fluid flow in tundish. The principles of U shaped baffle designs were proposed, and 18 types of FCD were evaluated by the residence time distribution (RTD) curve and strand consistency. The RTD curves of abnormal operations (with one strand closed) of the II shaped and U shaped baffles were also investigated.
Minimum Al Content for Forming Alumina Scale on Creep Resistant Ferritic Steels at 650 °C
Authors: Tang Xi , Xiang Zhi Dong , Pan H. , Yuan Ze Xi , Wu Run , Chen X.
Published: July 2011

This study was carried out to determine the minimum Al content needed to form an Al2O3 scale on creep resistant ferritic steels at 650 °C. Two steels differing mainly in Al content were oxidized in air at 650 °C for 3000 h. One of the steels contained 2.3 wt% Al and the other 1.9 wt% Al. Oxidation resistance of the two steels was also compared with that of the commercial P92 steel at the same temperature. The oxidation was monitored by weight gain measurement. XRD, SEM and EDS techniques were used to analyze the scale formed on the surface of the steels. For the steel containing 2.3 wt% Al, a continuous Al2O3 scale was observed after 3000 h of oxidation and growth of the scale was parabolic with an extremely low rate constant of 0.00058 mg cm-2 h-1/2. For the steel containing 1.9 wt% Al, however, only a non-protective scale was formed, which exhibited a layer structure that consisted of an outermost porous Fe2O3 layer, followed by a relatively dense intermixed Fe2O3 and FeCr2O4 inner layer and then by an internal oxidation layer containing voids, Al2O3 and un-reacted metal particles in addition to Fe and Cr oxides; growth of this type of non-protective scale followed the logarithmic kinetics Δmt = klln(αt + 1) for oxidation times up to 3000 h.
The Research on Long Life for Top and Bottom Combined Blown Converter on Semi-Steel Steelmaking
Authors: Li An Lin , Liang Xin Teng , Weng Jian Jun , Guo Dian Rong
Published: July 2011

According to the structure of purging plugs, the limit gas flow is obtained through theoretical calculation or practical test, that the minimum gas flow is 45Nm3/h and the maximum gas flow is 200Nm3/h.Different bottom blowing patterns suitable for smelting system were established based on different gas supply conditions about two and four purging plugs, at the same time, the maintenance technology of purging plug is developed under the condition of semi-steel steelmaking, these technologies are technology that is effective to improve the service life of purging plugs. A good result has been obtained after the combined blowing technology was put into production. The life of combined blown converters were greatly improved, the average life of combined blown is over 7000 heats, the life of combined blown can be the same with that of converter, the TFe in the slag is lowered by 3.25%, the [O] in steel is decreased by103PPm, the measured [C]·[O] at the end point of smelting is as high as 0.0026, the yield of alloy is increased significantly.
Influence of Titanium Compounds on Melting and Crystalline Temperature of Mold Powder
Authors: Zhang Cai Jun , Tu Dong Mei , Hu Min
Published: July 2011

Influence of TiN(0.5%~2.5%) and TiO2(1%~5%) on melting and crystalline temperature have been studied and analyzed in ferritic stainless steel containing titanium mold powder. The results show that with the increasing TiN content from 0.5% to 2.5%, the melting and crystallization temperature of mold power change between 1053~1082°C and 951~981°C respectively. With TiO2 content from 1% to 2%, the melting temperature is lower from 1066°C to 1047°C. As the content of TiO2 increasing to 5%, melting temperature increases obviously to 1077°C. TiO2 has less effect on the crystallization temperature of mold power.
Study on Mechanical Properties of Ribbed Cast Steel Spherical Joint in Complex Stress State
Authors: Zhang Yu Lan , Chen Zhi Hua , Liu Yong Jian , Wei Xie Jin , Bu Yi Du
Published: July 2011

Cast steel joints have been widely utilized in large-span spatial structures. Based on Ordos airport terminals engineering, the structure and design method of ribbed steel ball nodes is put forward in this essay, in which nonlinear finite element method is applied, bearing capacity and deformation capacity of ribbed steel ball nodes in the complex stress state is made a penetrating analysis to determine mechanical performance of the ribbed steel ball. Among other things, the manufacturing process and technical standards of cast steel ball nodes are elaborated.
Fatigue Crack Propagation Analysis of X60 Pipeline Steel Pipelines with Defects
Authors: Chen Mei Bao , Jiang Yu Rong
Published: July 2011

It is impossible to keep pipelines free from defects in the manufacturing, installation and servicing processes. In this paper, pre-tension deformation is used to imitate the defects of the part of material and the electric method is used to measure the distance of the fatigue crack. Experimental investigations were carried out on the fatigue crack propagation characteristics of X60 pipeline steel after different degrees of pre-tension deformation Test results show that the fatigue crack propagation was augmented with the pre-tension deformation increase, especially the crack propagation at the near threshold section. The results of quantitative analysis show, the pre-tension deformation reduced the fatigue crack propagation threshold and increased the crack propagation coefficient; consequently the fatigue performance of the part of mechanical damnification was degenerate.
BF Charge Reduction with Gases of Different H2 Ratio in High Temperature Zone
Authors: Tang Guo Zhang , Gao Zhen , Kong Yan Chang , Ouyang Kun , Li Fu Min
Published: July 2011

The reduction of different basicity BF charge with gases of different H2 ratio has been determined to simulate different BF technology. The results reveal: reduction rate (R & r) and metallization rate of charge increase with the H2 ratio increasing, and the temperature increasing while the reducing time becomes longer simultaneously. The direct reduction degree of charge in Hydrogen-enrichment BF is very low, thus the energy consumption of Ironmaking could be reduced. There is certain difference between metallization rate and reduction degree due to reduction kinetics. The mass loss rate of coke increases sharply with the H2 ratio increasing, the H2 ratio of gas should be selected an appropriate value.