bluuebunny/crossref_metadata_2025 huggingface dataset:
Biologic Disease-modifying Drug Treatment Patterns and Associated Costs for Patients with Rheumatoid Arthritis
Authors: McBRIDE STEPHAN , SARSOUR KHALED , WHITE LEIGH ANN , NELSON DAVID R. , CHAWLA ANITA J. , JOHNSTON JOSEPH A.
Published: August 2011

Objective.

To assess the influence of biologic treatment patterns on healthcare costs for patients with rheumatoid arthritis (RA) initiating tumor necrosis factor-α (TNF-α) antagonist therapy.

Methods.

Patients with 2 RA diagnoses (International Classification of Diseases, 9th ed, 714.xx), and without psoriasis or Crohn’s disease, were identified in a US employer-based insurance claims database. A sample of 2545 was constructed based on an index event of initiating TNF-α antagonist therapy and 30 months of continuous enrollment. Baseline characteristics were assessed in the 6-month pre-index period and treatment patterns were determined during the 12-month post-index period. Medical service and prescription drug costs were analyzed for Months 13–24 using multivariate regression analysis to control for baseline characteristics and time-varying confounding associated with treatment and disease severity.

Results.

In the first year after TNF-α initiation, 89% used a single TNF-α antagonist; only 9% and 2% had switched TNF-α antagonists or received non-TNF biologic disease-modifying antirheumatic drugs, respectively. Descriptive analyses revealed pairwise differences between groups (p < 0.05) in baseline characteristics (comorbidities, RA-related procedure use, and prescription drug use). Controlling for observed baseline characteristics, costs were greater for those treated with multiple vs single TNF-α antagonists: annual RA-related prescription drug costs ($8,340 vs $7,058; p = 0.012), RA-related healthcare costs ($15,048 vs $13,312; p = 0.008), and total healthcare costs ($26,697 vs $21,381; p < 0.001).

Conclusion.

In this sample, the majority of patients with RA were treated with a single TNF-α antagonist over the first year on therapy. For those who switched therapy, Year 2 RA-related and total direct healthcare costs were higher, adjusting for claims-based measures of RA disease severity.
Influence of Janus Kinase Inhibition on Interleukin 6-mediated Induction of Acute-phase Serum Amyloid A in Rheumatoid Synovium
Authors: MIGITA KIYOSHI , KOGA TOMOHIRO , KOMORI ATSUMASA , TORIGOSHI TAKAFUMI , MAEDA YUMI , IZUMI YASUMORI , SATO JUNJI , JIUCHI YUKA , MIYASHITA TAIICHIRO , YAMASAKI SATOSHI , KAWAKAMI ATSUSHI , NAKAMURA MINORU , MOTOKAWA SATORU , ISHIBASHI HIROMI
Published: August 2011

Objective.

Inhibition of intracellular signal transduction is considered to be a therapeutic target for chronic inflammation. The new Janus kinase (JAK)3 inhibitor CP690,550 has shown efficacy in the treatment of rheumatoid arthritis (RA). We investigated the influence of JAK/STAT inhibition using CP690,550 on the induction of acute-phase serum amyloid A (SAA), which is triggered by interleukin 6 (IL-6) stimulation in rheumatoid fibroblast-like synoviocytes (RA-FLS).

Methods.

IL-6-stimulated gene expression of the acute-phase serum amyloid A genes (A-SAA; encoded by SAA1+SAA2) and SAA4 was analyzed by reverse transcriptase-polymerase chain reaction. The intracellular signaling pathway mediating the effects of CP690,550 on IL-6-stimulated JAK/STAT activation was assessed by measuring the phosphorylation levels using Western blots.

Results.

IL-6 trans-signaling induced A-SAA messenger RNA (mRNA) expression in RA-FLS. By contrast IL-6 stimulation did not affect SAA4 mRNA expression, which is expressed constitutively in RA-FLS. IL-6 stimulation elicited rapid phosphorylation of JAK2 and STAT3, which was blunted by CP690,550. CP690,550 abrogated IL-6-mediated A-SAA mRNA expression in RA-FLS. Similarly, CP690,550 inhibited IL-6-mediated A-SAA mRNA expression in human hepatocytes.

Conclusion.

Our data indicated that CP690,550 blocked IL-6-induced JAK2/STAT3 activation, as well as the induction of A-SAA. Inhibition of IL-6-mediated proinflammatory signaling pathways by CP690,550 may represent a new antiinflammatory therapeutic strategy for RA and AA amyloidosis.
The Influence Analysis of Fatigue Limit for Mechanical Components Based on Standard Deviation of Full Scale Sub-Sample
Authors: Ouyang Bin , Ding Wen Qiang
Published: August 2011

Full scale sub-sample fatigue test of the mechanical components is direct relationship with the equalizing value of fatigue limit and the logarithmic standard deviation of the part. So, the full scale sub-sample fatigue test of the mechanical component plays a critical role on the assessment of the fatigue life. In this paper, the author implemented the standard deviation for the initial test data of full scale sub-samples with an epicyclic gear as example based on working standard of steeliness mechanical part. The test results declared that there were rather larger dispersion coefficients of standard deviation which influenced the safety fatigue limit of mechanical component due to a larger system errors were presence in the process of initial test. Compared to the previous test results, the safety fatigue limit of the steeliness epicyclic gear had been developed significantly by retest with reduced system errors.
Dynamic Modeling and Virtual Test of a New All Terrain Off-Road Vehicle
Authors: Lu Shao Bo , Li Yi Nong , Dong Yi Liang
Published: August 2011

This paper presents a new correlated methodology for engineers to develop a specific vehicle-Unimog associated with a unique structure of movement transmission. A complicated multi-body dynamic model which includes the front/rear axle suspension with thrust tube and coil springs, the steering system, tire and road exciting model is established based on the virtual reality (VR) technology. The topology and kinematics relation of the whole system are analyzed firstly, then the proper constrain pairs are applied among them to satisfy the amazing flexibility and ride comfort of the real vehicle. To more accurately model the real system, some key parameters are acquired by the way of experiment and prediction, respectively. And a triangle function method which combined the inverse Fourier and discrete random producer is proposed based on the standard PSD (power spectrum density). Finally, the ride performance has been evaluated on the random road by simulation and field test. The results show that the applied constraint of the model is correct and the kinematics relation matches the actual condition well. The consistency trends both in time and frequency domain for virtual and field test result show that the established model is effective.
Primary Application of the ILS Technology in the Tail Rotor Drive System of the Certain-Type Helicopter
Authors: Duan Cheng , Gao Jie , Wang Yong Hong , Lin Yong
Published: August 2011

This paper summarizes the connotation, the work objective and the main work content of the ILS (Integrated Logistic Support) technology which belongs to the transmission system by using a template for the development experience of tail rotor drive system of the certain-type helicopter. It introduces a primary way which is about how to improve the work efficiency and reduce the maintenance cost of tail rotor drive system of the certain-type helicopter by using the technology. It expounds the relation between the ILS technology and the reliability, the safety, the maintainability, the supportability and the testability, the ideology of the technology.
Computer Simulation Analysis of Bending Stress for Face Gear with a New Type Fillet Tooth Surface
Authors: Shen Yun Bo , Gao Jie , Ding Wen Qiang
Published: August 2011

Bending stress is a principal factor that defines the fatigue life of face gear. A new tooth surface structure with circular arc of fillet surface for the face gear has been developed. A method of processing or cutting of fillet surfaces of helical face gear by application of a shaper with tooth rounded top has also been represented. The bending stress of the tooth of face gear with new surface structure has been performed by computer simulation. Two versions of finite element model of tooth surfaces of face gear are generated by application of numerical technology. One version is based on the cutting shaper with tooth top shaper corner and another version is with addendum rounded top. Tooth contact analysis (TCA) and loaded tooth contact analysis (LTCA) for the two versions of face gear drives with helical spur gear are also considered. The results of simulation show that the bending stress of tooth surface of the face gear with fillet surface generated by the rounded top of the shaper is 12% lower than the first version’s.
Anonymous Function Method and its Application in Screw Pump’s Design and Processing
Authors: Zhang Yuan Xun , Tang Qian , Ye Xian Zhi
Published: August 2011

Matlab anonymous function method combining graph with analytical method was proposed in this paper, which was based on the low solving efficiency and low precision of trigonometry transcendental equation for shape line design and sectional profile calculation of screw pump rotor. Parameters of anonymous function can be nested within each other to solve enveloping conditional formula of shape design or intersecting line of sectional profile design for screw pump, the process of which only took several seconds with high precision of 10E-08mm. What’s more, this method could also be adopted in the forming tool design with spiral cross section, which could largely improve design efficiency and calculation precision.
Rotor Dynamic Design of a Helicopter Tail Drive Shaft System
Authors: Wang Yue Hua , Yuan Wei , Chen Ya Nong
Published: August 2011

This document concentrates on the relationship between critical speeds and geometrical dimensions such as length, outer diameter, thickness, support stiffness and so on. An effective method was summarized for helicopter tail drive shaft system rotor dynamic design. A tail drive shaft system designed by this method was mounted in a helicopter and performed its first flight-test successfully. According to the feedback of tests in the air or on test bench, the vibration level of this shaft system was very low and rightly met the design requirements.
Coupled Motion Control and Adjustment in Automatic Programming System of CNC Hobbing Machines
Authors: Li Qiang , Yi Li Li , Wang Shi Long , Zhou Jie
Published: August 2011

The motion relationship model of all axes involved in CNC hobbing machines is established. A single pitch adjustment method based on motion coupling relationship in gear hobbing is proposed. With position adjustment of only 0 to 1 pitch, the same motion coupling relationship during the whole machining process can be guaranteed. Though automatic programming system based on SINUMERIK 840D, the coupled motion control and adjustment in CNC hobbing process is realized. And practical application in CNC hobbing machines shows that this method can reduced adjustment time effectively during process, improving processing efficiency.
Powertrain Control Logic Test for Plug-in Hybrid Electric Vehicle
Authors: Ye Ming , Liu Yong Gang , Shu Hong
Published: August 2011

Mathematical representation of major parts of plug-in hybrid vehicle (PHEV) such as engine, motor, batteries, automatic clutch and vehicle body are made with analysis of configuration of PHEV. Specifications of data input and output and signal characters are defined. Hardware in the loop (HIL) system based on MATLAB/xPC for PHEV is built up. Take the case of motor/engine driving shift control logic test of PHEV is carried with inputting real acceleration pedal data. Testing results show that automatic clutch acts abnormally. Bugs in control logic are found out. Road test results with revised control logic are very good.
Design of Wind Turbine Gearbox Housing
Authors: Cao Qi Feng , Du Hai Ying , Zhang Yue Chun , Liu Ping
Published: August 2011

The requirements of wind turbine gearbox design techniques were recommended, and structure characteristics were analyzed. The housing of wind turbine gearbox was designed to be more compact and lighter by finite element analysis.
Multiscale Analysis on Friction-Reducing Characteristics of Textured Surface in Nanoscale Sliding Contacts
Authors: Tong Rui Ting , Liu Geng , Liu Lan , Ma Shang Jun
Published: August 2011

A multiscale method coupled molecular dynamics simulation and finite element method is used to investigate two dimensional nanoscale sliding contacts between a rigid cylindrical tip and an elastic face centered cubic copper substrate with textured surface, in which adhesive effects are considered. Two series of nanoscale surface textures with different asperity shape, different asperity heights and different spacing between asperities are designed. Through the friction forces comparisons between smooth surface and textured surfaces, a better shape is advised to indicate that asperity shape plays an important role in friction force reduction. With proper asperity height and proper spacing between asperities, surface textures can reduce friction forces effectively.
Dynamic Analysis and Experimental Study of MW Wind Turbine Gearbox
Authors: Wang Hai Jun , Du Xue Song , Xu Xiang Yang
Published: August 2011

Gearbox is the core component of wind power train，the operating of which directly affects the normal operation of wind power system, therefore, it is of great significance to carry out the dynamic characteristics of wind power gear box. The finite element model of coupling system composed of gear-rotor-bearing-box is established. By using Lanczos method，natural frequencies and vibration models are obtained. According to the method of experimental modal analysis，the MW wind power gearbox is tested by using SIMO method, the result of which agrees with theoretical calculation. Both of them verify the reliability of finite modal analysis of MW wind power gearbox.
Study on Visualization of Planetary Gear Based on Topological Theory
Authors: Shi Xiao Ying
Published: August 2011

Analyzed the topological graph based on the methods of functional fractionation, the new topological graph was established on this basis, the new graph’s exact information then can be obtained by computer. By using the software of visual basic 6.0, developed a human-computer interaction interface. The interface achieved three functions: first, we can draw the topological graph through the interface. Second, achieved the function of extract the graph’s information, finally realized the function of automatic assembly the epicyclic gear trains based on the extracted information. In order to meet the requirement of innovative design and parametric design, the author developed the part model library. At last, an example of automatic planetary gear assembly was given.
System Configuration and Evaluation for Optical Sled Drive Using Constraint-Tuning Ultrasonic Actuator
Authors: Lai Ming Hung , Wen Fuh Liang , Shen Yu Lin , Ouyang Min Sun
Published: August 2011

Through the estimated method for constraint-tuning modified-mode (CTMM), an innovative thin-disc piezoelectric ultrasonic actuator is used to drive an optical sled in this study. With four screws positioned on the thin-disc actuator at the angle distribution of 00, 900, 1800, and 3200, both modified modes of ((1, 2))Cand ((1, 1))Sin vibration provide an approximate equilibrium force to push an optical sled in bilateral movement. The innovative ultrasonic actuator has the vibrator’s compact and thinner structure, a thickness of 3 millimeters, without a gearbox rather than a conventional DC sled motor. Using contact friction to drive an optical sled with quick tracking in bilateral motion, experimental results demonstrate obtaining the desired function by a proposed single-phase, bi-frequency LC resonant driving circuit as well as remaining the original sled controller. The general specification of linear speed achieves 200－300 mm/s at less power dissipation for pushing the CD652A BenQ sled drive with 1.0 N output force and 20%－33% efficiency.
Error Analysis Model of Aircraft Multi-Joint Assembly Based on Linkage Mechanism Theory
Authors: Tan Chang Bai , Xu Jiang , Zhou Lai Shui , An Lu Ling , Wei Wei
Published: August 2011

Multi-joint link is a class of typical structure in aircraft assembly. And the quantification of assembly error is very important to tolerance allocation and assembly quality prediction. A novel error analysis model of multi-joint assembly is established based on linkage mechanism theory. First, a virtual linkage mechanism will be created according to specific structural character and tolerance of joint linkage. And then, the input-output equation of linkage mechanism can be derived by vector method. Subsequently, the coaxiality and coplanarity error analysis models are developed respectively for three-joint and four-joint assembly. Finally, a case study on the elevator & horizontal empennage docking demonstrates the proposed method.
Portable Underwater Pressure Measurement System
Authors: Liu Ya Shu , Zhang Ai Jun , He Yun Feng
Published: August 2011

According to particularity of pressure measurement about underwater gun, this paper expounds the advantages of strain sensor, and designs a suit of portable underwater pressure measurement system based on it. It is particularly introduced that the system’s hardware design principle and strain sensor’s working principle. Experimental results shows that the measuring accuracy of this pressure measurement system almost equivalent to one of the traditional system. But it is smaller and lighter.
Effect of MoO3 on the Clinkers Formation of Portland Cement
Authors: Yu Li Bo , Xu Zhi Ping , Dong Guo Wei , Zhu Yuan Na
Published: August 2011

The effects of MoO3additives on the clinkers mineral formation of portland cement were investigated by X-ray diffraction,scanning electron microscopy. One reference mixture and others modified mixtures, prepared by mixing the blank sample with chemical grade MoO3were studied. Based on experimental result, MoO3shows the less positive effect, MoO3added less than 1wt% was benefit for f-CaO absorbtion, but when more than 1wt% MoO3was added, with the temperature increasing, increasing the free CaO (f-CaO) content compared with the pure sample,which cound not promote the formation of 3CaO·SiO4. MoO3can stabilizes crystalline structure of β-2CaO·SiO4. The analysis results for the microstructure indicate that grain size of C3S in the samples with MoO3is larger than that of only -portland clinker.
Effects of Conductive Supports on the Growth and Capacitive Performance of Nanostructured Manganese Oxides
Authors: Guo Na , Qin Zong Yi
Published: August 2011

The manganese oxide (MnO2) nanocrystals were formed on the surface of graphene oxides (GOs) and multi−walled carbon nanotubes (MWCNTs) through a facial hydrothermal route, respectively. It is found that the similar flower−like MnO2 nanocrystals covered on both conductive supports. Moreover, more dense and less size of MnO2 nanocrystals appeared on the surface of MWCNTs, whereas more perfect crystal structures for MnO2/GOs. Electrochemical measurements showed that both the nanocomposite electrodes exhibited nearly ideal capacitive behavior, and large capacitive value can be obtained for MnO2/GOs, while high stability for MnO2/MWCNTs. The high capacitance performance arises from the unique nanostructure of the nanocrystals, which facilitate the contact of the electrolyte and the active materials, and carbon−based materials provide an effective support for the formation of the nanocrystals and conductive pathway for the nanocomposite electrodes.
Effect of Volume Fraction and Temperature on Thermal Conductivity of SiO2 Nanofluids
Authors: Zhu Bao Jie , Zhao Wei Lin , Li Dong Dong , Li Jin Kai
Published: August 2011

Thermal conductivities of two kinds of nanofluids (SiO2-water and SiO2-ethylene glycol) were measured by transient hot-wire method at different volume fraction and temperature. Influences of volume fraction of particles and temperature on thermal conductivities of nanofluids were analyzed. The Experimental results show that thermal conductivities of nanofluids are higher than those of base fluids, and increase with the increase of volume fraction and temperature. When approximately 0.5% volume fraction of SiO2nanoparticles are added into water and ethylene glycol at the temperature 50°C, the thermal conductivities are enhanced 46.2% and 62.8% respectively.
Preparation and Photoluminescence of Hybrid SiO2-Coated CdTe Nanocrystals
Authors: Liu Ning , Yuan Zhi Min , Yang Jie , Zhang Yu Lan , Zhang Rui Li , Cao Yong Qiang , Zhang Ai Yu , Zhu Yuan Na , Yang Ping
Published: August 2011

Novel hybrid SiO2-coated CdTe core-shell nanocrystals (NCs) were fabricated by re-dispersing green-emitting CdTe NCs in a solution of Cd2+ions, thioglycolic acid (TGA), tetraethyl orthosilicate and ammonia with a sol-gel reaction at room temperature and a further reflux procedure. The hybrid NCs consisted of a CdTe core and a hybrid SiO2shell with CdS-like clusters. The clusters created by the reaction of Cd2+and S2-generated by the decomposition of TGA during reflux. The hybrid NCs exhibited tunable photoluminescence (PL) color from green to red and high PL quantum yield (PLQY). The CdS-like clusters play an important role for the hybrid NCs with numerous PL properties. Compared with initial CdTe NCs, the PLQY of the hybrid NCs increased from 18% to 47% together with a red-shifted PL peak wavelength of 61 nm. The average lifetime of the hybrid NCs (39 ns) is longer than that of initial CdTe NCs (25 ns). The high PLQY and the hybrid shell make CdTe NCs an important application for biological technique.
Effect of Reaction Temperature on the Morphology of Carbon Nanofibers
Authors: Yu Li Yan , Sui Li Na , Dong Hong Zhou , Dong Li Feng
Published: August 2011

Carbon nanofibers with various morphologies were synthesized by the catalytic pyrolysis of acetylene using nickel catalyst nanoparticles at different reaction temperatures. Experimental results demonstrate that temperature is a critical parameter for controlling the size and morphology of carbon fibers. Twin coiled fibers and linearly bifurcating fibers emanating from nickel particles were formed at 400 °C; whereas, only linear carbon nanofibers were obtained at reaction temperatures of 450 °C, 500 °C, and 550 °C. At low temperatures, nickel nanoparticles remain in the middle of two fibers, while nickel particles are positioned at one end of the linear fibers at high temperatures.
Finite Element Analysis of High Pressure Torsion Processing
Authors: Guan Qian , Zhu Chun Dong , Dai Tai Liang
Published: August 2011

Considerable interest has recently been developed in processing bulk materials through the application of severe plastic deformation (SPD). High pressure torsion(HPT) is one of severe plastic deformation methods. By this method, the material grain size can be refined to 20~200nm, which are nanometer level, and the micro-hardness and mechanical properties of materials can be improved. So the nanometer material can be got through this method. In this paper, the results of the rigid-plastic finite element analysis of the plastic deformation behavior of bulk materials during the HPT processing are presented. The torque and strain patterns of the sample as well as the relationship between the slippage time and pressure are also investigated.
Determination of Interdiffusion Coefficient in Nanolayered Structures by Auger Electron Spectroscopical Sputter Depth Profiling
Authors: Wang Jiang Yong
Published: August 2011

A general method was developed for determination of interdiffusion coefficient in nanolayered structures by Auger electron spectroscopical (AES) sputter depth profiling. The procedures of this method are as follows: (1) the concentration depth profile of annealed sample is calculated from its as-grown layered structure by adopting a suitable diffusion model; (2) this diffusion concentration depth profile is convoluted with a resolution function provided by the mixing-roughness-information depth (MRI)-model and as a result a calculated AES depth profile is obtained; (3) the interdiffusion coefficient is determined by fitting the calculated AES depth profile to the measured one. As an example, the interdiffusion coefficient parameters, the pre-exponential factor and the activation energy, were determined as 4.7×10-18 m2/s and 0.76 eV, respectively, for a GexSi1-x/Si multilayered nanostructure with Ge-Si alloyed layers of 2.2, 4.3 and 2.2 nm thickness in Si matrix.
Optimization for the Formation of Metal Hydride Electrode Used in Ni/MH Batteries
Authors: Do Jing Shan , Tsai Ruei Lung
Published: August 2011

The effect of charging current, temperature, concentrations of KOH and LiOH, soaking time and temperature on the utilization of metal hydride (MH) electrode in the formation of Ni/MH battery is investigated by the conventional experimental design. The experimental results indicate that the optimal charging conditions are the charging time ratio of 9/1 with 0.1 and 1.0 C-rates. The other optimal conditions for the formation of MH electrode re 25°C, 8.02 M KOH and 0.48 M LiOH aqueous solution. The steady utilization of MH electrode is 83.52% for the soaking temperature of 45°C and the soaking time greater than 24 h, respectively. According to the Taguchi's orthogonal arrays, the relationship between the utilization of metal hydride electrode (y) and the formation factors is obtained to be y = 75.52 - 6.58A + 3.98C + 5.09E + 6.71F - 1.32AC + 2.57BC + 5.62E2 - 10.67F2 where A, B, C, E and F are the charging current, the charging temperature, the concentration of KOH in the electrolyte, the soaking time and temperature, respectively. Under the optimal formation conditions, the utilization of MH electrode is increased from 87.25% to the steady value of 98.50% by increasing the charging/discharging cycle from 1 to 4.
Suppressing the Powdering of Zirconia Fibers after High-Temperature Application by Large Additions of Yttria
Authors: Hou Xian Qin
Published: August 2011

Zirconia fibers with different Y2O3 additions were prepared by sol-gel method. After the fiber was thermally treated at 1650°C for 6h, the microstructure and crystalline phase were investigated by scanning electron microscope and X-ray diffraction. It was found that the fibers with 5mol% of Y2O3 seriously powdered due to volume expansion caused by the phase transformation form tetragonal phase to monoclinic phase. The powdering of zirconia fibers after high–temperature application could be depressed when the amount of Y2O3 was more than 10mol%.
Study on Solvent Extraction of Fast Pyrolysis Bio-Oil
Authors: Tian Qi Kui , He Liang , Zhang Hang , Lv Zhao Lin , Li Rui
Published: August 2011

The bio-oil, pyrolyzed in a vacuum fast pyrolysis reactor from larch sawdust, has high percentage of water (45%), low viscosity(9.80 mPa.s) and pH(2.75). The bio-oil sample was analyzed by GC/MS after filtered under vacuum conditions, which contains aldehydes(25.17%), ketons (5.56%), alcohols(11.35%), esters(4.46%), acids(6.54%) and phenols(20.99%). Two schemes, single stage extraction and multistage reflux extraction, were attempted to study the extraction efficiency of solvents, using cyclohexane, dichloromethane, ethyl acetate and butyl acetate. All the fractions were analyzed by GC. Of the four solvents, the efficiency of dichloromethane is highest, while cyclohexane basically has no use. Comparing with single stage extraction, the efficiency of multistage reflux extraction is as high as 1.5 to 3 times. Especially, yields of alcohols and acids, using dichloromethane, are respective 72.39% and 52.27%. However, there is a decline in the extraction for ketons and aldehydes, respectively using dichloromethane and ethyl acetate.
Research on Strategy-Oriented Management of Environment Performance of County and Municipal Party and Government Leaders
Authors: Zhou Jing Kun
Published: August 2011

This paper provides a model of strategy-oriented management of environment performance of Party and government leaders at the county and municipal levels, framworked by culture, procedure and basic guarantee system together for management of environment performance of Party and government leaders at the county and municipal levels; it emphatically narrates the strategy-oriented management procedure of environment performance of Party and government leaders at the county and municipal levels, composed of seven stages: the making of environmental protection strategies of county and municipal governments, the formulating of key performance indicators and plans of environmental protection and plans of Party and government leaders at the county and municipal levels, implementation and evaluation of performance, feedback and application of performance evaluation results; besides, it also analyzes differences between the strategy-oriented performance management and the traditional performance management.
Studies on Donor-Acceptor Substituted with Triphenylamine-Core Fluorescent Derivatives
Authors: Zhou Cai Qi , Hu Bin , Li Cui Hong , Lou Qian Ping , Song Qing Bao , Zhang Cheng
Published: August 2011

A series of donor-acceptor (D-A) substituted with triphenylamine-core fluorescent derivatives have been synthesized via nucleophilic addition of Grignard reagent to 2,7-dibromo-9-fluorenone, CF3SO3H-promoted Friedel-Crafts reaction, Ullmann coupling reaction, and Pd-catalyzed Suzuki cross-coupling reaction in turn. Aromatic imide (N-phthalimide) group was firstly introduced as electron acceptor in the donor-π-acceptor (D-π-A) opto-electronic materials. Hole-injection capability of the fluorene derivatives were promoted by introducing 4-methyl-triphenylamine (MTPA) group at the 9-position. All these compounds present excellent solubility and thermal stability (with glass transition temperature of 191-279 °C), thermo gravimetric analysis (TGA) indicated that 5% or 10% weight losses occurred at about 415-463 °C or 427-498 °C respectively. The relationship of the solvent polarity or the conjugation length of the D-A structure with the luminescent properties has been studied by the UV-vis spectra and the fluorescent spectra. The CV data revealed that these fluorescent derivatives are possessed low-lying HOMO energy levels ranging from -5.19 to -5.37 eV and are exhibited strong blue-green luminance around 448-546 nm.
A Cement Based Piezoelectric Composite Sensorfor Health Monitoring of Civil Engineering Structure
Authors: Huang Shi Feng , Chang Jun , Qin Lei , Yang Xiao Ming , Li Zong Jin , Cheng Xin
Published: August 2011

A cement based piezoelectric composite sensor using 1-3 cement based piezoelectric composite as sensing element was fabricated. The basic properties of the sensor were mainly investigated. The results indicate that in the frequency range from 0.1 to 40 Hz, the output voltage amplitudes of the sensor increase nonlinearly with increasing frequency of input load under 10 Hz. When the frequency of input load is larger than about 10 Hz, the output voltage amplitudes of the sensor is nearly independent of frequency. There exists an obviously linear relationship between the output voltage amplitude of the sensor and input load amplitude. The output voltage of the sensor is correspond to the complex load very well. The phase difference between the output voltage of the sensor and input load is near zero. Therefore such sensors have a good potential to be used in civil engineering structural health monitoring.
Synthesis of Large-Area and Monolayer of Graphene: Role of Transition Metal Support and Growth Time by CVD Method
Authors: Gao Hui , Wang Yun Fei , Liu Yan Xia , Xie Er Qing , Ajayan Pulickel M.
Published: August 2011

Continuous monolayer graphene sheet with large area has been synthesized via chemical vapor deposition (CVD) method using liquid hydrocarbon as precursor. Synthesis parameters including growth substrate and growth time have been investigated to assess their influence on monolayer graphene synthesis. Raman spectroscopy and high resolution transmission electron microscopy (HRTEM) reveal that the number of layers and quality of graphene sheet depend greatly on the varied synthesis parameter. The study could be used to improve understanding the growth of graphene by CVD method in order to meet the needs of graphene in various electronic applications.
Application of Styrene-Butadiene Rubber in Cement-Based Materials
Authors: Wang Ru , Wang Pei Ming
Published: August 2011

This paper summarizes the function of styrene-butadiene rubber (SBR) in cement-based materials, focusing on the achievements of the authors in recent years. The effect of SBR on the properties of cement mortar is introduced, i.e. the workability of fresh mortar such as the water-reduction and water-retention effects of SBR, the mechanical properties of hardened mortar such as the tensile bond strength, flexural and compressive strengths, flexibility and anti-impacting capacity, the waterproofness such as the capillary water adsorption and anti-penetration capacity, the microstructure such as the matrix structure and interface structure, and the cement hydration such as the calcium silicate hydrates, calcium aluminate hydrates and polymerization of [SiO4]4- tetrahedron.
The Electrochemical Polymerization of Polypyrrole Microstructures in an Aqueous Solution of Dodecylbenzenesulfonic Acid
Authors: Wang Wen Qin , Zhang Rui Feng , Lu Lin Chao
Published: August 2011

Conducting polymer – polypyrrole (PPy) microstructures were fabricated in an aqueous solution of dodecylbenzenesulfonic acid (DBSA) by electrochemical polymerization. The study implied the concentration of DBSA had great effect on the morphologies and conductivities of PPy microstructures. At lower DBSA concentration (0.2M), no obvious microstructures were generated. Increasing DBSA concentration, some novel “chayote-like”, “flower-like” microstructures were obtained by modulating electrochemical conditions. The growth process of microstructures was studied by scanning electron microscopy and relevant mechanism was discussed. Raman characterizations indicated that the microstructures were made of conductive PPy doped by DBSA.
Determination of Creep Parameters of Conductive Asphalt Concrete
Authors: Yan Shi Lin , Li Wen Tao , Wu Shao Peng , Pang Ling
Published: August 2011

The research on the conductive asphalt concrete(CAC) is to melt snow and ice on the pavement and improve the property of skid resistance. However, research at present mainly focuses on the electrical property not on the fatigue behavior which is also important to the application of CAC in the future. The specific rheological model is developed and the relation between creep and fatigue is investigated in this paper. By the single axial static creep test, the existed rheological model (Burgers model) and method of regression, the creep deformation of asphalt concrete is measured with time and parameters of the model are obtained. The results indicate that strain increases quickly with increasing time at initial loading phase, and then the change of strain tend to a stable value in a constant load. At unloading phase, strain decreases immediately and then keep another stable value which was greater than zero. The addition of conductive fillers improves the elastic properties and has no significant influence to the viscosity of asphalt concrete. In addition, the fatigue life can be predicted by the parameters of the Burgers model. The addition of conductive fillers improves energy dissipated, which leads to shorter fatigue life of conductive asphalt concrete compared to the control at levels of longer fatigue life.
Experimental Study on Influential Factors of Adiabatic Temperature Rise for Mass Concrete
Authors: Wang Dong Dong , Tian Wei Li , Wang Cheng Qi
Published: August 2011

Experiments on adiabatic temperature rise are systematically carried out in this paper, the characteristics of adiabatic temperature rise of concrete with different mineral admixtures are compared. The influence of binder amount, water-binder ratio, placing temperature and superplasticizer is also studied. The results reflect that binder is the main factor affecting adiabatic temperature rise, mineral admixtures such as fly ash can significantly reduce the rate and amount of heat development, large quantity substitution of slag in concrete can relieve the concentrative heat liberation, the retarded superplasticizer can prolong the exothermic process effectively and high placing temperature has adverse effect on temperature control of mass concrete.
Effects of LaCrO3 Composite Additive for the Hydration Resistance of MgO-CaO Refractory
Authors: Sun Jie Jing , Yin Chao Nan , Liu Yong Jie , Liu Shi Quan
Published: August 2011

Effect of different blending amount of LaCrO3, a composite additive, on the hydration resistance and crystallization properties of magnesia-calcium refractory were studied by measuring hydration rate, using X-ray diffraction and scanning electron microscopy. The results show that the LaCrO3at a low addition (≤1%) can significantly decrease the hydration resistance of the MgO-CaO material when the burning temperature is 1550°C, and the hydration rate is only 0.183%. LaCrO3can promote the growth of the CaO, while it has little effect on MgO. The Cr2O3and CaO can melt into CaO·Cr2O3in a high temperature. The CaO·Cr2O3can not only promote sintering but also wrap on the CaO, which is negative for the grain to contact with water, and consequently improve the hydration resistance of magnesia-calcium refractory.
Dynamics Analytical Model of Cutting Force in Metal Cutting Processing
Authors: Guo Jian Ying , Li Wen Bin , Wang Shi Ying , Lv Ming
Published: August 2011

Cutting force is an important parameter in machining. The static balance method and experience formulas had been adopted to find its value, but the theoretical calculated value is not good agreement with the experimental value for the same set of cutting conditions. In practical machining, the cutting tool has obvious impact effect on workpiece, so a dynamics analytical model for cutting process is established in this paper. Based on the proposed solution, a new formula for cutting force has been obtained. The suggested formula has shown to correspond well with the experimental data.
Efficiency Analysis and Optimization on Magnetic Resonance Coupled Wireless Transfer System
Authors: Tan Lin Lin , Huang Xue Liang , Qiang Hao
Published: August 2011

In this paper, a magnetic resonance coupled wireless transfer system is studied to establish the efficiency analysis model. By analyzing the influencing factors of system efficiency indicates that the system transfer power is mainly determined to the resonance frequency, and only near the resonance frequency has achieved a maximum value. With experimentally studying the load received power varied with frequency at the transfer distance from 80cm to 120cm, we believe that the magnetic resonance coupled wireless transfer system’s optimization can be realized by controlling the frequency.
Trust Model Based on Feedback Evaluation in Cloud Manufacturing Environment
Authors: Xie Xiao Lan , Liu Liang , Cao Ying Zhong
Published: August 2011

Aiming at the existing trust issues under manufacturing environment. This paper proposes a trust model based on feedback evaluation, TMBFCM, from the characteristics of human of trust relationship of human society. The model proposed a set of evaluation indicators of cloud manufacturing services properties, introduced the dynamic trust mechanism for attenuation by time,established the service which cloud manufacturing services providers provided and the feedback evaluation and incentive mechanism given by the user of cloud manufacturing service, improved the dynamic adaptability of the model. The results show that, compared with the existing trust model, the evaluation results are closer to the true service behavior of cloud manufacturing services provider, it can resist all kinds of malicious attacks acts effectively, demonstrated good robustness and recognition.
Quantitative Estimation Technique for Wear Amounts by Real Time Measurement of Wear Debris in Lubricating Oil
Authors: Sun Wen Bin
Published: August 2011

A diagnostic technique that can estimate quantitatively wear amounts under lubricated condition was tentatively designed using the on-line particle concentration and counting technique. In this proposed device, the standing surface acoustic wave (SSAW) was used to concentrate the wear debris in the lubricating oil in a micro-channel, the debris were then delivered to an appropriately sized detector and scanned one by one. The size and number of wear debris in the circulating oil could be therefore measured and counted on-line. The volume of each wear particles was calculated by accumulating each volume in real time. The wear debris amounts obtained by this quantitative estimation technique were fairly similar to the measured values of mass loss of the specimens. This proposed device was conveniently embedded in the lubricating system. This study was expected to open new avenues for the real time fault diagnosis and life prognosis of machine.
Formation Conditions for Ce2O2S and CeAlO3 in Cerium Treated Al-Killed Steels
Authors: Wu Cheng Chuan , Yang Xiao Hong , Cheng Guo Guang
Published: August 2011

An investigation has been carried out to determine the formation conditions of Ce2O2S and CeAlO3in cerium treated Al-killed steel. Argon protection melts have been manufactured of appropriate base steel compositions with varying additions of cerium (0.006-0.04%). The work has shown that 0.0015-0.02% may be retained in steels after Al deoxidation and cerium treatment while oxygen and sulphur content be 14-17 ppm and 60-70 ppm respectively. With 0.0099-0.02% retained cerium, resulting inclusions are largely spheroidal in shape and consist of several crystalline compounds, notably Ce2O2S and CeAlO3. Thermodynamic analysis indicates that the CeAlO3would be formed with the cerium content in the range of 8.65ppb to 1.45ppm when the content of aluminum was 0.01%.
Study of Thermal Stress of Iron-Boron Alloy Casing
Authors: Zhang Yun , Li Yong Di , Wu Jian Jun
Published: August 2011

The outer casing of heater made of iron-boron alloy is brittle fractured easily. It is a an effective way to add continuous fibers in brittleness material to improve the mechanical properties of composites. Temperature and thermal stress distribution of iron-boron alloy casing and the influence of thickness on the thermal stress of the casing is computed with finite element method, and the thermal stress distribution and influence of fiber volume fraction of continuous fiber-reinforced composites is studied. The result indicates that the external surface is in tensile stressed condition, and the internal surface is in compression stressed condition; the thermal stress increases with the thickness. The compression stress of the matrix decreases and the tensile stress increases with the increasing of the fiber volume fraction.
Rubber Modified Asphalt Storage Stabilizer Option
Authors: Chen Zhong He , Zhang Zheng Qian , Luo Hua Lin , Dong Ning Ning
Published: August 2011

In order to improve the poor compatibility and storage stability of rubber modified asphalt,authors using theoretical and experimental methods, to investigate the influence of the stabilizer on the storage stability and the using performance of rubber modified asphalt, through adding the different types and different doses of stabilizer, to improve its storage stability and using performance of modified asphalt.
Comparison of the Friction and Wear Properties of PTFE Coatings under Vacuum Conditions before and after Gamma Irradiation
Authors: Yuan Xing Dong , Xu Bin , Yang Xiao Jie , Ma Hai Long
Published: August 2011

The friction and wear properties of Polytetrafluoroethylene (PTFE) coatings before and after gamma irradiation were studied under vacuum conditions. Experimental results indicated that the friction and wear properties of PTFE coatings were improved by gamma irradiation. Results showed that the wear process of PTFE coatings before and after gamma irradiation consists of three stages. The steps for the irradiated PTFE are slightly longer than that for the non-irradiated samples. The friction coefficient of irradiated PTFE coatings reduces slightly compared to that of the non-irradiated samples. The friction coefficients of the PTFE coatings before and after gamma irradiation first increase with the increase of sliding velocity and then decrease with the increase of sliding velocity, and The friction coefficient of PTFE coatings before and after gamma irradiation decreases with the increase of load. The wear of irradiated PTFE coatings is slightly lower than that of non-irradiated PTFE coatings. The wear of PTFE coatings before and after gamma irradiation first decreases with the increase of sliding speed and then increases as the sliding speed increases. The wear of PTFE coatings first decreases with the increase of load and then increases with the increase of load. Scanning electron microscope (SEM) was utilized to investigate the worn surfaces.
Safety Design of Ammunition Screw Dismantlement Based on Temperature Control
Authors: Zhang Zhi , Zhang Da Wei , Cheng Jing Sheng
Published: August 2011

Safety is very important in the dismantlement of screw-joint ammunition parts. The main factor which influences the safety is the temperature of screw area during the process of dismantlement. The design method based on temperature control is studied in the paper. Influential factors including resistant moment, axial force and dismantlement speed are analyzed. The dismantlement speed can be control to satisfy the safety design. The method and steps of the safety design is put forward which aims to control danger limited temperature.
Synthesis and Infrared Emisstivity Properties of CdS/ZnS/Al Composite Material with Microemulsions
Authors: Wang You Jun , Lü Xu Liang , Deng An Zhong , Li Dong
Published: August 2011

CdS/ZnS core-shell structure was synthesized with reverse microemulsions in the system of cetyl trimethyl ammonium bromide (CTAB)/ C5H12O/ C6H14/H2O and precipitator mixed thioacetamide (TAA )and ethylenediamine (EDA), which was coated on the surface of Al particles. The characteristics of the composite particles were investigated by means of X-ray diffraction (XRD), scanning electron microscope (SEM )and Fourier transform infrared (FTIR). Emissivity of composite material in 8~14 µm waveband was 0.2574. The results showed composite material had lower infrared emissivity when PH value was between10 and 11, mol ratio of Zn/Cd was 0.3, and the reaction temperature was 70°C.
Study on the Pair’s Characteristics of Web Press’s Fold System in High Speed
Authors: Yuan Ying Cai , Li Yan , Wang Yi Ming
Published: August 2011

In high speed, the web press’s fold mechanism appears nonlinear dynamic response characteristics, which seriously affect the fold system’s stability and precision. The clearance and roller’s deformation are the main factors to cause the nonlinear dynamic response. To study the influence of clearance and roller’s deformation, the hypothesis of rigid role and spring combination is put forward. Based on the hypothesis, the dynamics model of fold system with clearance is established by kinematics and dynamics analysis. Through the dynamics model of fold system, the situation of pair clearance and roller’s deformation can be obtained, and the influence to the dynamic performance of fold system can be easily got.