bluuebunny/crossref_metadata_2025 huggingface dataset:
Design of the Centralized Control Circuit for Large Ship Borne Squid Jigging Machine
Authors: Wang Wei Jie , Qian Wei Guo , Kong Xiang Hong , Yang Ming Xia
Published: September 2013

Squid jigging machine is an important equipment in the oceanic squid jigging fisheries. Now, we have used the intelligent squid fishing machine, though, we have to guard the machine one by one. To reduce the labor on deck, we designed a serial interface circuit between PC and Single Chip Microcomputer (SCM) for the communication within multiple squid jigging machines by the way of RS-485 bus, realizing centralized control of machines. For hardware, we converted TTL level to 485 level by serial interface conversion chip so that SCM could achieve RS-485 interface communication; For software, we customized instruction sets, data package format, communication protocol format. We designed RS-485 bus interface circuit for PC and SCM by simulation software Proteus. Through tests in the field, we knew the circuit makes the connection of centralized control network simple, and signal transmission reliable. We will pay particular attention to the design of communication protocols software, which can provide new thinking of designing about communication within multiple machines for the researchers.
H∞-Based LQR Control for Flexible Air-Breathing Hypersonic Vehicles with Pole Placement
Authors: Zhang Xue , Liang Xiao Geng
Published: September 2013

Focusing on a nonlinear longitudinal dynamical model for air-breathing hypersonic flight vehicles (AHFV), we propose a state feedback linearized model on a nominal trim condition. To stabilize the flight of an AHFV in the presence of external disturbances, a newHbased Linear Quadratic Regulator (LQR) control law with pole placement is designed. Indexes forHperformance, quadratic performance and pole placement are considered together. As a result, the robustness of system is improved and the AHFV system is effectively stabilized. Numerical simulation shows that the controller can effectively stabilize the AHFV system with some disturbances and assign the poles into a desired region.
Method of Detection for Complex Surfaces Based on Industrial Close-Range Photogrammetry
Authors: Wang Li Zhong , Zhang Dong Dong , Liang Jin , Liao Xiao Bo
Published: September 2013

The rapid detection of the large complex surface was researched with the development of China's manufacturing industry. A industrial close-range photogrammetry new detection Method was put forward based on the analysis of three-dimensional optical measurement principle. The experiment results verify that the accuracy of the three-dimensional optical measurement system independently developed by Xi'an Jiao Tong University meets the Engineering requirements. The main characteristics of large workpiece can be clearly measured and the detection method can be easily used at the production site.
3D Measurement of Anatomic Parameters and Development of a Digital Design to Improve the Outcome of Lower-Extremity Surgery
Authors: Ding Huan Wen , Tu Qiang , Wang Hong , Liu Hui Liang , Shen Jian Jian , Ren Li , Wang Ying Jun
Published: September 2013

Background: To overcome disadvantages of the older surgical model, we invented a new three-dimensional (3D) correction surgery design after studying computer-aided 3D model analysis. Methods: Three-dimensional reconstruction was carried out for computed tomographic (CT) scans of patients with normal bilateral lower extremities; an anatomical model was established; and the normal values of 3D anatomic parameters of the lower-extremity joints were measured with computer assistance. An osteotomy procedure was simulated using a computer, appropriate osteotomy site, and osteotomy angle, and an osteotomy method was selected. Computer-assisted design (CAD) was used to produce an individualized auxiliary osteotomy template for guiding the osteotomy and an auxiliary correction template for guiding correction surgery. Finally, we accurately performed surgery according to the preoperative design. Results: All surgeries were performed successfully and postoperative x-ray films showed satisfactory deformity correction. Conclusions: Computer-aided lower-extremity joint correction surgery is more accurate and convenient than conventional surgery.
Facial Diagnosis of Chinese Medical Syndromes of CHB and its Correlation with Liver Function
Authors: Sun Zhu Mei , Zhou Rui , Li Fu Feng , Wang Yi Qin , Gao Yue Qiu , Ye Jin , Zhang Wei Fei , Qian Peng
Published: September 2013

The paper is to objectively describe the features of facial diagnosis of CHB patients with Chinese medicine facial diagnosis digital detection system, analyze the changes of facial diagnosis parameters and to explore the correlation between facial color, gloss parameters and liver function. The study reflects the Yellow parameter of CHB patients are significantly higher than that of normal group (P<0.05), but the Red parameter and Black parameter of CHB patients are lower (P<0.05).liver function of G and AlT in CHB patients are negatively correlated with facial diagnosis parameters while AST is positively correlated, which indicates facial diagnosis parameters can be used as the basis of Chinese medical syndrome diagnosis of the disease. This study puts forward a new method and idea for clinical syndrome differentiation of CHB.
Game Analysis on the Shareholders, the Manager and the Auditor in Equity Incentive Process
Authors: Luo Fu Bi
Published: September 2013

Equity incentive is a two-edged sword. In this paper, a three party game model among shareholders, the manager and auditor is built to study the equity incentives negative effects. The results are: the probability of the manager and the auditors collusion to manipulate accounting information is negative connected with the shareholders punishment, and is positive connected with the monitoring cost. Shareholders should improve the technical ability and measures to punish the manager and auditor heavily when they collude to manipulate financial information; Shareholders and the regulatory agencies should give no chance to the manager and the auditor to obtain extra income from accounting information manipulation as much as possible.
The Effect of Precipitants on Co-Precipitation Synthesis of MgO-ZrO2 Powders
Authors: Huang Yuan Jun , Liu Ting , Liu Min
Published: September 2013

MgO-ZrO2nanosized powders have been synthesized via the co-precipitation route using ammonia, ammonium carbonate and ammonium hydrogen carbonate as precipitant, respectively. The three different powders were characterized by TG-DSC, XRD and SEM. And the sinterability behavior of each powder also has been investigated. The results indicated that uniformly dispersed and much looser MgO-ZrO2nanosized powders could be obtained when the ammonium carbonate, especially the ammonium hydrogen carbonate were used. When ammonia was used, some agglomeration could be observed. The crystalline grain size of the three powders is closed to each other. Due to the existing of agglomeration, the sintered samples prepared by using ammonia as precipitant exhibited poorer sinterability than that of using carbonates as precipitant.
Trifluoromethyl-Promoted Oxidation of Fischer N-Heterocyclic Carbene Complexes by DMSO
Authors: Zeng Wei , Qiu Rui , Wang En Yu , Chen Fu Xue
Published: September 2013

A new protocol for trifluoromethyl-promoted oxidation of fischer-type N-Heterocyclic Carbene copper complexes has been developed by DMSO, which allows the preparation of imidazolinones from carbene complexes.
Synthesis and Properties of a Novel Photochromic Diarylethene 1-(2,4-dimethyl-5-thiazolyl)-2-[2-methyl-5-(4-formylphenyl)-3-thienyl]perfluorocyclopentene
Authors: Li Xiao Ting , Li Hui , Cui Shi Qiang
Published: September 2013

A new unsymmetrical photochromic diarylethene, 1-(2, 4-dimethyl-5-thiazolyl)-2-[2-methyl-5-(4-formylphenyl)-3-thienyperfluorocyclopentene (1o) were synthesized. At the same time, its photochromic properties and fluorescence switch were investigated in detail. The results showed this compound exhibited reversible photochromism, undergoing reversible cyclization and cycloreversion reactions upon alternating irradiation with UV and visible light both in solution and in PMMA film, and its absorption maxima of closed-ring isomer 1c were observed at 501 nm in hexane and at 510 nm in PMMA amorphous film, respectively, upon irradiation with 297 nm UV light. The open-ring isomer of the diarylethene 1 exhibited relatively strong fluorescence at 449 nm in hexane solution (2 × 10-5 mol/L) and 450 nm in PMMA amorphous film when excited at 300 nm and 292 nm, respectively. The fluorescence intensity decreased along with the photochromism upon irradiation with 297 nm light. The fluorescence intensity of diarylethene 1o also depended on the concentration. When the concentration of diarylethene 1o in hexane increase from 1 × 10-6 mol/L to 2 × 10-4 mol/L, the fluorescence intensity of the open-ring isomer become strong first, then become weak.
Application of Vibrating Fluidized Bed in Low Rank Coal Drying Process
Authors: Zhao Yong Jie , Kong Xiang Wei , Li Bin , Zhang Zi Cheng
Published: September 2013

Low rank coal is an important energy resource in the world, particularly in the developing countries. But its high water content causes a waste of energy and serious environmental pollution, which restricts its applications. In order to improve the efficiency of the low rank coal and reduce pollution, the drying processes for low rank coal are urgently needed. This paper presented a review of the general drying processes for low rank coal. In the review, the newly-developed vibrating fluidized bed (VFB) drying process was emphasized. This novel VFB drying process which can be used in large-scale industrial production has several advantages, such as high speed, high drying intensity and low pollution. Moreover, two VFB researches reported by the authors were also introduced. In these researches, the dynamic behavior of VFB was simulated by two commercial codes of ADAMS and ANSYS separately. According to the simulation results, the exciting force and the structure of sieve box were optimized.
Study on the Dispersion of Carbon Doped Titanium Dioxide Powder in Aqueous Solution
Authors: Wang Zhi , Yang Zhi Qiang
Published: September 2013

The dispersion of carbon doped titanium dioxide (TiO2) powder in aqueous solution was studied. The spectrophotometer method was used to determine the effects of dispersant additive ratio, ultrasonic time and pH value on the dispersion of TiO2. The results show that the carbon doped titanium dioxide aqueous solution was found to have the optimum dispersion performance when the mass ratio of sodium hexametaphosphate (SHMP)/TiO2/water is 1:50:100, the ultrasonic time is 15min and the pH value of the solution is 10.
Co-Oxidation Effects of Methanol on Reactive Orange 7 and Polyvinyl Alcohol in Supercritical Water
Authors: Zhang Jie , Wang Shu Zhong , Gong Yan Meng , Li Yan Hui , Lu Jia Ming
Published: September 2013

Methanol acting as co-oxidation component was introduced in supercritical water oxidation experiments of Reactive Orange 7 and polyvinyl alcohol. Experiments were performed at 673K and 25MPa. The concentrations of Reactive Orange 7 and polyvinyl alcohol were constant at 5wt% and 1wt%, respectively, with increasing methanol concentrations. For the binary mixture of methanol/ Reactive Orange 7, the experiment results showed that the total nitrogen and total organic carbon removals in the mixture were higher than that in the absence of methanol, and as methanol concentration increased, the accelerating effect was more notable. For methanol/polyvinyl alcohol mixture experiment, at the oxidation coefficient of 2.0, the presence of methanol (0.2-1.5 wt%) accelerated the decomposition rates of polyvinyl alcohol and total organic carbon, while methanol addition showed negative effects at the oxidation coefficient of 1.05. The inhibition reaction was attributed to the increment in induction time of polyvinyl alcohol oxidation in the presence of methanol.
The Application of A/O Treating Mixing Pharmaceutical Wastewater
Authors: Ouyang Er Ming , Wang Na
Published: September 2013

A/O was applied to treat the mixing pharmaceutical wastewater. After 1.5 months, SV could reach 20%~27% stably, the sludge biofloccus shows filemot and a good precipitation performance. The removal rate of COD can basically reach 70%, the removal rate of NH3-N could increase into 60%, the A/O system started successfully. When A/O system run stably, the average removal rate of COD and NH3-N could reach 75% and 55%, respectively.
Environmental Pollution Analysis and Countermeasures of the Golf Course in Yangzonghai Area
Authors: Li Fa Rong , Yang Shu Ping , Yu Dong , Wang Hong Mei , Chen Yan , Peng Yue Nuan
Published: September 2013

The golf course industry has become increasingly aware of potential problems related to pesticide and fertilizer movement from soil into surface water and groundwater . The objective of this study was to monitor and analysis the pollution level and scope, varying pattern, diffusion characteristics and the impact on the lake which are influenced by the Spring City Golf Course located in the catchment area of Yangzonghai Lake. It produced data on the quality of the surface water bodies, groundwater and soil environment including nitrogen, phosphorus, pesticides and heavy metal , and proposed some control measures in the last part.
Research on Environment Improvement with Development Strategies of Low Carbon Ecological Shijiazhuang City
Authors: Zhao Yan Na , Xing Xiu Qing , Wang Qing , Gao Chun Yan
Published: September 2013

With continuously worsen of environmental,People gradually realize the importance of environment improvement.Development of City as a place for creating wealth becomes a focus problem.This paper introduces the current situation of the development of Shijiazhuang city,firstly.Then we analyzed the problems in the development of low carbon ecological city.Finally, we put forward some development proposals.
Implementation of Environmental Supervision on Promoting Environmental Impact Assessment System
Authors: Ran Qing Kai , Luan Sheng Ji
Published: September 2013

Starting from the point of view of whole process environmental impact assessment and taking into account of reducing impact of reality regulations, reducing information asymmetry and protecting the rights and interests of citizens, this article analyzes the impacts of environmental supervision on promoting environmental impact assessment system.
Research on the Ecological Environment Protection from the Perspective of People's Livelihood
Authors: Hu Zhi Yuan , Zhang Chen Chen
Published: September 2013

The ecological environment is the place of human survival and activities and the base providing natural resources supply for the human's need of the production and consumption, and it is also the human survival foundation and the base of the development. Environmental protection is the proper meaning of problem about protecting and improving the livelihood of the people. It is not only the development problem and the people's livelihood, but also is the concrete embodiment of the people-oriented governing concept. The guarantee of people's livelihood cannot do without environmental protection and improving the people's livelihood also cannot do without environmental protection. The state and quality of the environment, affect directly people's living condition and social development level, which determines the success or failure of the country and the nation ultimately.
Analysis on Effects of Strain Rate to Dynamic Recrystallization Process of Metals by 2-D CA Model
Authors: He Yan , Gao Ming , Feng Wen Jiang , Zhang Zhi Mei
Published: September 2013

A tow-dimensional Cellular Automaton model has been established to simulate dynamic recrystallization (DRX) process of metals. The model considers the process of dynamic recovery, dislocation density, nucleation rate and etc on DRX. The variation of dislocation density, recrystallization-grain (R-grain) shape, orientation and mean size of R-grains can be detected during the whole deformation process. The simulated results agreed well with classical theory of growth kinetics. The effects of strain and strain rate to DRX and R-grains are discussed in the end of this paper. The percentage of DRX and mean size of R-grains are related with both strain and strain rate.
Study on Tourism Environment with Strategic Research on the Tourism Development of Hunan Low-Carbon
Authors: Dong Zi Xiong , Wu Yue
Published: September 2013

The unique tourism product system originated from the blend of beautiful natural scenery and the profound Huxiang culture have formed the tourism environment advantages for Hunan to develop low-carbon tourism. In order to build up a powerful tourism city and adhere to the principles of green tourism and low-carbon tourism, Hunan province has created tourism environment advantages set about from government, enterprises and social citizens, devoting itself to cultivating the low-carbon tourism culture and developing low-carbon products of Hunan, fulfilling the low-carbon of tourism environment, innovating the low-carbon tourism environment management system of the government as well as improving the level of the public awareness of tourism environment, so as to carry out the overall developmental strategies of low-carbon tourism environment.
Decontamination of Wastewaters Containing Synthetic Organic Dyes by Electrochemical Methods: A Review
Authors: Liu Bo , Guo Wan Qian , Ren Nan Qi
Published: September 2013

Bioelectrochemical systems or electrochemical reduction reactors have great potential for treating wastewater that contains dyes for decolorization. They are reported to enhance decolorization rate and degree with external energy supply and to help microorganisms or noble metal as catalysts. Till now literatures regarding dye decolorization with electron reduction using BESs or electrochemical reactors is deficient. This paper reviews the performance limitations, future prospects, and improvements of the common used dyes decolorization and decolorization with external voltage or current supply in Bioelectrochemical systems.
Analysis of Axial Local Flux Characteristics in Hollow-Fiber Membrane
Authors: Cui Zhao , Wang Jie , Jia Hui , Dai Xiao Hong , Zhang Yan
Published: September 2013

Based on the characteristics of non-uniform distribution in the fouling of hollow-fiber membrane, the non-uniform distribution of local flux and redistribution with different fiber length (0.6 m、1.2 m、1.6 m) was investigated experimentally. Experiment was conducted under the condition of operating flux 20 L/m2h (20 LMH). The results indicated that the longer fiber length was, the greater difference in local pressure and the more non-uniform the local flux distributed. Under operating mode of critical flux, the flux distribution in the length of 1.6 m membrane fiber is the most non-uniform with the fastest fouling rate. In addition, the distribution of local flux is more uniform for 0.6 m fiber under the operating flux of 16 LMH, which also slow down membrane fouling significantly. Shorter membrane fiber generally exhibited higher uniformity in the local flux distribution and slower development rate of membrane fouling.
Study on the Assessment Method of Wastewater Treatment Technologies Based on Comprehensive Scoring Method
Authors: Meng Xian Lin , Qu Jian Hua , Yu Liang Hua
Published: September 2013

Technology assessment is one of the important means of technology management. To assess and screen out the optimal papermaking wastewater treatment technology, this paper proposed an assessment method based on comprehensive scoring method, and an index system contains four aspects including processing effect, cost-benefit, processing time and sustainability and ten indexes was established through analytic hierarchy process. Take the papermaking wastewater treatment technologies in region A for example, four typical technologies was assessed. The result reflected that flotation technology was superior to electrodialysis, which was superior to chemical oxidation technology. It showed the assessment method could be well applied to assess papermaking wastewater treatment technologies in region A.
Bioremediation of Nitrobenzene Contaminated Groundwater by a Mixed Culture
Authors: Jin Hu , Ding Feng , Liu Na
Published: September 2013

In this experiment, solid biological agents were used for the degradation of the nitrobenzene contaminated groundwater. Degradation characteristics of the strain under the different conditions, such as concentration of nitrobenzene, cultured temperature, pH and rotary speed were studied. Results showed that when the concentration of nitrobenzene was 200mg/L, the degradation rate was highest, which was reached to 99.5%. The optimum cultivation conditions of the consortium for the growth temperature, pH and shaker rotary speed, which obtained the strongest rate of nitrobenzene were 10°C, 7 and 120 r/min, respectively and we can see from the result of DGGE that each lane contained bands are more and contained diversity of strains.
Treatment of Organic Phosphorus Pesticides Manufacturing Wastewater by Supercritical Water Oxidation
Authors: Tang Xing Ying , Wang Shu Zong , Qian Li Li , Li Yan Hui
Published: September 2013

Oxidation of organic phosphorus pesticides wastewater (OPPs-MW) was studied in a batch-reactor under the supercritical oxidizing water condition. The temperature, pressure and coefficient of oxidation were investigated as influence factor for COD removal efficiency by response surface methodology. Temperature is the most significant factor in treatment OPPs-MW and a good fitting polynomial equation obtained. Organic acid would generate under incomplete decomposition condition and NH3-N could hardly decompose effectively when temperature below 600°C
Selection of Material with High Salt Concentration in Preheating Section of Supercritical Water Oxidation System
Authors: Tang Xing Ying , Wang Shu Zong , Qian Li Li , Lu Jia Ming
Published: September 2013

The corrosion behavior of Incoloy800, Incoloy825 and dual-phase steel2205 were studied on preheating section (275°C, 25MPa and [Cl1] 5500ppm) of supercritical water oxidation system. The results were investigated by means of scanning electron microscopy and energy dispersive spectroscopy. Incoloy800 presented pitting corrosion and corrosion on the surface of Incoloy825 and dual-phase steel2205 is not significant. Molybdenum can improve resistance to pitting corrosion and dual-phase steel shows a good corrosion resistance under the preheating section. Corrosion rates of Incoloy800, Incoloy825 and dual-phase steel2205 were 7.6mm/s, 2.6mm/s and 1.8mm/s, respectively, which were investigated by weight loss method.
Beam Frame Supported Shear Wall Structure Based on the ANSYS Finite Element Static Analysis of Beam-Type Transfer Floor
Authors: Cheng Xing Hua , Ma Fu
Published: September 2013

This article research frame supported shear wall structure Beam-type Transfer layer at the supporting wall (across full) shape and the supporting column two structure forms, in the same form of vertical uniformly distributed load, the stress distribution variation trend and characteristics of the analyzed and discussed. Using large-scale finite element analysis software ANSYS to two different Beam-type Transfer structure of the nonlinear simulation analysis, combined with the stress nephogram of X to the analysis of two kinds of structure forms of the transfer beam and upper wall and the frame work characteristics [. The results of the study show that: In terms of the vertical stress, wall shape across the full shear wall in the stress of the beam structure performance is better, Column will produce large stress in the beam. Shear wall and stress of the transfer beam work together to transform beam has a great influence.
Analysis on the Ductility Performance of Reinforced Concrete
Coupling Beams in Shear Wall Structure
Authors: Zhang Peng , Ma Fu
Published: September 2013

Coupling beam, the first line resisting earthquake, is directly related to the overall performance of the shear wall structure. Using the large general finite element analysis software ANSYS, the coupling beam span-depth ratio is 2~3 different reinforcement scheme in finite element analysis. Analysis on the ductility performance of reinforced concrete coupling beams in shear wall structure in three fields: the concrete strength grade, the longitudinal reinforcement ratio and the stirrup ratio, provides a basis for the design of the structure and to provide a reference for similar studies.
Characterization of Zinc Oxide Nanoparticles and their Inhibitory Effect on Human Lens Epithelial Cells under UVB Irradiation
Authors: Guo Da Dong , Tang Hong Ying , Bi Hong Sheng
Published: September 2013

Posterior capsular opacification is the most frequent complication after cataract surgery, which is induced by the proliferation, differentiation and migration of lens epithelial cells. Inhibiting the proliferation of human lens epithelial cells could reduce the occurrence of posterior capsular opacification. To explore the possible potential of ZnO nanoparticles in treating posterior capsular opacification, we investigated the effect of ZnO nanoparticles on the human lens epithelial cell proliferation in the presence and absence of ultraviolet B (UVB) irradiation via 3-(4,5-dimethylthiazol-2-yl)-5-(3-carboxymethoxyphenyl)-2-(4-sulfophenyl)-2H-tetrazolium (MTS) assay. The results indicate that ZnO nanoparticles could apparently inhibit the proliferation of human lens epithelial cells in a dose-dependent manner, and UVB irradiation can further enhance this inhibitory role for the human lens epithelial cell proliferation, indicating the great potential of ZnO nanoparticles in treating posterior capsular opacification in clinical application.
Application of In Situ Direct Shear Test for Obtaining Soil Shear Strength Indexes in Projects
Authors: Lu Yu Jun , Ge Xin Sheng
Published: September 2013

In order to provide precise shear strength indexes for a building foundation pit supporting project, the second layer and the third layer of foundation soil were in-situ direct shear test. In-situ direct shear test has its own advantages in projects, and it simulates the real soil condition and reflects practical shear strength. But in-situ shear test requires lots of manpower, material resources and financial resources, so it is not convenient to carry out a lot in practical projects.
Study on Engineering Materials with the Comparison and Discussion of Support Scheme in a Foundation Pit
Authors: Zhen Zheng , Liang Ren Wang
Published: September 2013

Taking a deep foundation pit engineering in Taiyuan as research background, this paper used two different supporting structure of foundation pit to make numerical simulation analysis by using Li zheng software. The engineering material had high cost performance. In addition, the paper studied the displacement, bending moment, shear force with the change of the excavation depth, and it came to the conclusion that some outcome can be used for reference in the practical engineering.
Theoretical Analysis on Settlement Calculation of Pile Foundation with Minimum Complementary Energy of Elastic Mechanics Based on the Ritz Variational Method
Authors: Yao Zhi Ran , Ge Xin Sheng
Published: September 2013

In this paper, based on the model test，numerous deductions and calculations have been done, which was about the settlement of single pile and pile group in homogeneous foundation. With minimum complementary energy of elastic mechanics on the basis of the ritz variational method, through the MATLAB programming, theoretical calculation results were obtained, then comparison and analysis with the model test results were made to verify the feasibility of theoretical calculation.
The Relative Performance Study of Foam Concrete Straw-Based
Authors: Cai Jin Ke , Zhang Yong Sheng
Published: September 2013

The experiment is to extract lignin from straw as the basic material, then to develop cheap resin. By mechanical foaming, we are to research lignin-based epoxy compounds with commercial foaming agent or sodium lauryl sulfate and the foam stabilizing effect under the experimental condition that adding or not coagulant. The study shows that the actual amount of foam can change the strength and weight of foam concrete to some extent. The results of experimental show that the lignin-based epoxy resins prepared by inexpensive straw can be applied YX-M-8-type foaming agent and the modification of sodium dodecyl sulfate in order to improve the utilization of straw, with great social and economic benefits.
CLC:TU522 Document Code:A
Implication of Filling Technology with Super Absorbing Material on Inclined Face with Highland Stress
Authors: Zhang Hai Yang
Published: September 2013

Taking 12,802 fully-mechanized mining face in Mine Yunjialing in Wuan, Hebei Province,China for example, high-water quick consolidated filling materials was used to mechanized build and to fill leaving roadway, high-water quick consolidated filling materials of PACK type was utilized in this work, the suitable ratio of water and feed ratio is 1.575:1 and the design size of filling bags is 3000mm × 2000mm × 2500mm (length × width × high). After site detection of the strength and pressure of filling body, the filling effect meets the production requirements.
Keywords: Yunjialing mine; leaving roadway technology; super absorbing materials; filling
Study on the Startup Characteristics of the Methanogenic UASB Reactor under Acid Condition at pH5.5
Authors: Wang Bao , Ding Jie , Liu Hong Jian , Liu Chun Miao , Cheng Wang Bin , Zhang Lu Yan , Liu Xian Shu , Ren Nan Qi
Published: September 2013

The reactor was started up under the neutral condition. The pH value in the reactor was gradually lowered down. At pH 7.0, the average COD removal efficiency the biogas yield and the methane content of the UASB reactor were steady at 93% above, 25L·d-1and 54%, respectively. During the period of the pH value lowered from 7.0 to 5.5, the average of the COD removal efficiency, the biogas yield and the methane content of the UASB reactor were 83.1%, 19.6L/d and 47.7%, respectively. At pH 5.5, the operating condition of UASB reactor began to recover from the 76thday, and on the 84thday, the COD removal efficiency, biogas yield and the methane content recovered to 80.5%, 17.1L/d and 47.9%, respectively.
Synthesis and Application of Porous Nanomaterials
Authors: Wang Xiao Li , Han Xu , Yu Shi Jun
Published: September 2013

Hierarchically porous materials have attracted recent attention because of the development of new routes to form them and because they are associated with improved efficiencies when used as catalysts or as electrode materials in secondary batteries. Hierarchical porosity enables high surface areas and, hence, high solid fluid exchange associated with small pores to be combined with the high flow rates associated with large pores.
Determination of Hydrogen Gas Emitted from Coal by Gas Chromatography and its Significance
Authors: Zhao Zhi Gen , Wu Ji Wen
Published: September 2013

Methane in coal mine gas is the research focus about the prevention of gas hazard and the development and utilization of coal bed methane. There have been more researches on heavy hydrocarbon in coal mine gas and a consensus has been formed about heavy hydrocarbon. Compared with methane and heavy hydrocarbon in coal mine gas, the research on hydrogen in coal mine gas is few and just unfolding. In this paper, 1097 gas samples are prepared based on 1097 coal samples. And, the hydrogen in gas samples is tested by Gas Chromatography. The research reveals that: the hydrogen contents in all gas samples can be detected, and the maximum value of hydrogen is 4.8% while the mean value is 0.645%, so the presence of hydrogen in gas is universal. 2 contents of hydrogen exceed 4%, 47 contents are between 2%-4% and 206 contents are between 1%-2%, thus, the content of hydrogen in gas is roughly the same with the content of heavy hydrocarbon in gas. It is suggested that: more attentions should be given to the hydrogen in gas to be an important index of coal and gas outburst and to be an important index of gas explosion, safety of coal storage and transportation.
Discussion on the Site Selection of Handan History Settlements
Authors: Wang Fang , Yang Cai Hong , Chen Hua
Published: September 2013

Handan city is a historical and cultural city of nation level in China, it had a long history and particular geography, thus there were lot of ancient settlements established in history. This essay discusses settlements and dwellings in Handan and shows arguments concerned with towns or courtyard development.
Normalized Soil Deformation Induced by Underlying Bedrock Fault
Authors: Cai Qi Peng , Huang Yun , Meng Fan Yan
Published: September 2013

Prediction of subsurface ground deformation during bedrock faulting is important for structures located at potential seismic areas. In this paper, a theoretical approach was developed based on error function. Settlement profiles are found to be well represented using error function. Normalization issues of settlement profiles are discussed and it is found that the vertical displacements can be normalized with vertical displacement of the bedrock hanging wall h.
Numerical Analysis of Fire Performance of a Spacial Pre-Stressed Steel Structure in Fire
Authors: Wang Tian Hong , Xu Jin Can , Tong Hai Lun , Wang Xin Tang
Published: September 2013

The numerical model of analysis of fire performance of a spatial pre-stressed steel structure with large span was established based on the software Marc. The thermal response and structural response of the pre-stressed steel structure was computed for some nodes of the structure in fire. The different fire scenes were considered for analysis of response temperature, displacements and stresses of the nodes of the pre-stressed steel structure.It is concluded that the temperature rise of the nodes of the structure is far behind that of air near the nodes, however they are quite close as the fire lasted for 3600s and almost the same after 7200s.The results show that the displacement of the node right above the inner cable is the maximum and the node above the outer cable has the smallest value of displacement and the maximum value is about two and half times as large as the minimum.The results show that the reason why the cables are out of work is that the equilibrium between the cables and the rods of the structure is lost, but not that the stress relaxation caused by thermal expansion make the cables out of work.
The Effect of Human Activity on the Distribution of Soil Nitrate Nitrogen in Unsaturated Zone
Authors: Gao Hui Yan , Yang Lu Hua , Li Tian , Guo Zi Peng
Published: September 2013

Soil moisture and nitrate nitrogen were measured respectively in planting area and non-planting area in RANZHUANG experiment station from 2011 to 2012. The effect of human activity on soil moisture and nitrate nitrogen was analyzed. The results show that soil moisture content varies from 8.61% to 30.09% within 0~250cm depth and is tended to be stable below 250cm deep layer in non-planting area. The distribution of soil nitrate nitrogen is a single peak curve, the peak moves downward at a speed of 0.81cm/d in percolation of rainfall. Soil moisture varies form 21.23% to 41.67% within 0~400cm depth and is tended to be stable below 400cm deep layer in planting area. Nitrate nitrogen is mainly accumulated at 0~100cm deep soil layer in the wheat growth period. In the maize growth period, the distribution of nitrate nitrogen is double peak curve in 0~500cm soil profile. The upper peak occurs at 40~100cm soil layer, the peak of nitrate nitrogen content is between 26.7~54.6mg/kg; the lower emerges at 150~260cm soil profile, the value is between 36.7~106.36mg/kg. Deep percolation of the nitrate nitrogen is obvious due to unreasonable irrigation and fertilization. The nitrate nitrogen content accounts for 52.3% of the total nitrate nitrogen below the root zone soil, which is a potential contamination source of groundwater.
Chinese Traditional Garden of Water and the Chinese Culture
Authors: Dong Ya , Zhou Ya
Published: September 2013

Chinese traditional culture has a great impact on the construction of the Chinese traditional garden. Chinese classical gardens of Dealing with Water is inextricably linked with the Chinese culture. This article from the point of view of Chinese culture Confucian ,the Taoist viewpoint and Buddhist perspectives on Chinese garden of Dealing with Water elaborately, modern design philosophy has certain referential significance.
Application of the CRD Method in Construction of an Ultra-Shallow, Ultra-High Section and Large-Span Mined Tunnel
Authors: Su Jian Feng , Xu Yu Feng
Published: September 2013

This paper explain the controllable factors of the application of the CRD method in the construction of an ultra-shallow, ultra-high section and large-span mined tunnel. And it also introduce the construction scheme of the application on the background of the Ou-Zhuang station air duct C of Guangzhou Metro line No.5. The practical application shows that the CRD method is not only an applicable method but also a necessary means for this kind of tunnel.
Size-Dependent Piezoelectric Coefficient d33 of Nanoparticles
Authors: Zhang Shuai , Chen Lei
Published: September 2013

Size-dependent piezoelectric coefficient d33(D) (D shows particle diameter) for small ferroelectrics is modeled in this paper. It is found that taking account of size effect is essential in understanding piezoelectric characteristics of nanoferroelectrics. The model prediction is in good agreement with the experimental results for PbTiO3nanoparticles, where d33(D) increases correspondingly as D decreases.
Macro-Mechanical Parameters Analysis of Rock Slope Based on the Partition Classification Method
Authors: Wang Jun , Peng Cheng Jun
Published: September 2013

Accurate mechanics parameters are the precondition of reasonable calculation in the finite element method to calculate the deformation and stability of the rock mass engineering stability. Partition classification method can be used in the simulation of macro-mechanics parameters of rock mass, for the distribution of multiple sets of multi-level joint fissure in some engineering rock, the parameters of the rock mass can be simulated using the numerical method step by step or by group. Based on the partition classification method, the paper simulated the macro-mechanics parameters of natural slope upstream the left bank toe board of Maerdang hydropower station. The slope is divided into three areas according to the rock types and intensity, weathering degree, fracture, the trend and tendency of the fault, spacing and connected rate of the structure surface, the mechanics parameters of the structure surface, the groundwater conditions, and then use the partition classification method to calculate the region's macro-mechanical parameters, the results can be used to provide amount of reasonable parameters for the stability calculation of the slope in the subsequent deformation.
A Study on the Change Law of Fundamental Frequency of Rigid Pavement
Authors: Zhang Xian Min , Xue Hua Xin , Dong Qian , Sun Zhi Chao
Published: September 2013

The fundamental frequency is the inherent attribute that describes the structural mechanical property of rigid pavement. A finite element model of 45 m x 15 m x 11 m is given by means of the ANSYS software. With the method of modal analysis, the pavements structure was analyzed with 8 different thickness of surface course, 6 kinds of modulus of surface course, 5 different thickness of base course, 5 kinds of modulus of base course, 5 different thickness of subgrade and 8 kinds of modulus of subgrade, and correspondingly, the fundamental frequency was calculated . The results show that thickness and modulus of surface course, thickness and modulus of base course have less effect on fundamental frequency, which decreases with increase of modulus of subgrade, but increases linearly with the growth of thickness of subgrade, these two factors have the main influence to the fundamental frequency. The research provides the theory basis and reference to the detection of the pavement in airports.
Approximate Theoretical Analysis on Excavation Disturbed Zone of a Soft Rock Slope in Suining-Ziyang Expressway Engineering in Southwestern China
Authors: Cao Xing Song , Hu Ya Yun , Liu Shi Xiong
Published: September 2013

A cutting slope model can be simplified as plane strain one, the stress field of cutting slope can be analyzed with elastic wedge body theory. By using strength criterion of slope material (Mohr-Coulomb strength criterion with safety reserve and uniaxial tensile strength criterion), the disturbed zone caused by excavation can be calculated in 3D stress state, so all the disturbed zone after each step of excavation from the top down can be searched out. The main analysis steps for judging disturbed zone are described in the paper, including the methods to calculate the stress state of cutting slope, the unloading value and the scope of disturbed zone after last step of excavation. Finally, an example in Suining-Ziyang expressway engineering is chosen to explain detailedly the analytical process with elastic wedge body theory to determine the disturbed zone.
Surface Overpressure Distribution and Dynamic Response of the Retaining Wall of the Underground Structure Subjected to Inner Explosion
Authors: Tian Li , Deng Peng
Published: September 2013

An underground structure has been in a state of static equilibrium under the combined effect of gravity and the surrounding soils confining pressure before internal explosion occurred, and the blast wave can experience multiple reflections and diffractions in closed space, so the overpressure on the surface of structural members was more complex than that when explosion happened in the open space. In this paper, a finite element model of a closed underground frame structure was established by using the finite element software ANSYS/LS-DYNA. Based on the model, numerical simulation by stages was done to study the overpressure distribution on the surface of the retaining wall. This paper main analyzed the effect of the initial balance stress on the blast overpressure distribution rule and the retaining walls dynamic response.
The Research on Earth Pressure behind Inclined Retaining Wall Considering Arching Effects
Authors: Zhu Jian Ming , Zhao Qi
Published: September 2013

The earth pressure behind inclined wall considering the soil arching effects which was decided by two factors, the coefficient and average vertical stress, was necessary to research. Based on the analysis of stress state behind the retaining wall, the unified solution of active pressure and passive pressure was derived and was used to calculate both the magnitude and point of application. According to examples, as the angle of inclined retaining wall increasing which was signifying by , the arching effects would be also increasing which the soil was in the passive limit and be falling which the soil was in the active limit.
ANSYS Analysis of Early Removal Template Support-System Security
Authors: Zhao Fu Long , Wang Xiao Li , Ran Qun , Li Qing Ping
Published: September 2013

The paper makes research on the early removal template support-system which is designed for a new template support system Invented by China Construction Forth Engineering Division Corp. Ltd. The system can be widely used inside and outside in a building structure engineering, bridge engineering and the temporary Housing stage erection. Compared to the ordinary steel template support, early removal template support system has more excellent performance advantages and is more convenient in the erection of the dissolution , stable performance node etc.
On the Water Environment of Kaifeng City of the Northern Song Dynasty
Authors: Li He Qun , Song Zhi Yi
Published: September 2013

In the Northern Song Dynasty Dongjing city of Kaifeng, there were many rivers, ponds and other bodies of water, which had a certain relationship one another and relative independence. These waters had important influence on the layout of the city, urban economy, the public life and environment. Under its influence, now Kaifeng city has still many lakes, called "the North Water City"
Study of Coating Binder Migration and Affected Parameters
Authors: Zhen Zhao Hui , Wang Zheng Shun
Published: September 2013

Because of the coating binder migration in cross-section of coating layer, the binder concentration will be different in z-direction of coating layer, which affect some properties of coated paper. The Paper studied the effects of pigment type, coating color solid content and dying temperature on binder migration and affected factors. The z-direction distribution of the coating binder which was tagged with Br in coating layer and its concentration in coating surface were examined quantitatively by using SEM-EDXA and ESCA analysis. The mechanism of binder migration was also proposed. The results indicated that the degree of binder migration is directly proportional to the drying temperature, that the increase of the ratio of calcium carbonate in the pigment content, coating surface binder concentration increased. The result also indicated that the degree of binder migration was increased with reduced the coating solid content.
Uncertain Factors and their Effects that Need Considering in Fire Engine Routing: A Short Review
Authors: Wang Jun , Zhou Hong Mei , Liu Meng , Ge Ying En
Published: September 2013

This paper gives an overview of some key uncertain factors that affect fire engine routing, mainly including traffic congestion, the occurrence of natural disasters and human malicious actions. We propose to incorporate the effects of these uncertain factors in a unified modeling framework for the fire engine routing problem and an optimization model that include multiple objectives, such as travel distance, travel time and reliability of a path. Major issues related to these key uncertain factors that we need address in fire engine routing are discussed which prospects future research trends in this area.
The Ranking of Optimization Schemes of Public Traffic Line Network Based on Set-Pair and Entropy Analysis
Authors: Hong Ling , Qu Si Yuan
Published: September 2013

As there are uncertainties in the public transportation network optimization evaluation process, many existing methods cannot simultaneously describe the uncertainties in different types and therefore will result in an un-objective reflection of the actual problem. In this paper set-pair and entropy analysis is used to analyze the internal connections of the system globally and locally. This model which is simple in calculation and easy to use has theoretical and practical values for new ideas and methods of uncertainty analysis of the public transportation network optimization.
Research on the Critical Attributes of Travel Mode Choice Utility Function
Authors: Zhang Quan , Wu Wei Tiao
Published: September 2013

Since the urban traffic congestion becomes severe increasingly,the fundamentalsolution is reasonableallocation ofresources, and togive priority tothe development ofpublic transport carrying large capacity. Many scholars are researching how to attract travelers to give up the car and transfer to public transit. The problem is that what extents do the service attributes such as time costs and other change can lead travelers to the mode conversion. The utility function which depicts the probability of attribute parameters and selection probability must have a critical state causing the conversion. Account for this, the concept of critical expected utility is proposed, and gradient theory is introduced, combined with spatial analytical geometry method. Besides, by deriving method for solving the critical value based on the Probit model, depicts the dependency of the critical balance of each parameter. Finally, several strategies are proposed for a special line for Asian Games, and an evaluating indicator is designed for comparison and analysis, which has great impact on transport policy formulation and adjustment.