Applied Mechanics and Materials Vols. 130-134

Abstract: In this paper a novel hybrid organic–inorganic amino hybrid material monolithic column for capillary electro chromatography (CEC) is preparation and characterization. The amido hybrid material monolithic column was prepared in situ co-condensation of tetraethoxysilane (TEOS) with 3-aminoproplytriethoxysilane (3-APTES) via sol-gel procedure. The all kinds of factors that effect the morphology of monolith column were investigated. The results showed that the structure of monolithic column could be adjusted easily through altering the composition of sol solution.

Abstract: In order to study characteristics of anaerobic co-digestion of corn straw and cabbage, the experiment was performed with corn straw to cabbage (S:C) of 4:1, 6:1 and 10:1 based on total solids (TS) at 35±1°C at initial TS of 8%. The effects of co-digestion on pH, volatile fatty acid (VFA), and biogas yield were examined. Results showed that the S:C of 4:1 was optimal with accumulative biogas yield of 334.53mL/gTS compared with S:C of 6:1 and 10:1 with accumulative biogas yield of 289.31mL/gTS and 311.37 mL/gTS, respectively. This should be attributed to the high VFA concentration achieved by S:C of 4:1.

Abstract: The selective catalysis reduction (SCR) is one of the most promising technologies for NOx reduction at present. There are three types of NH₃-SCR catalysts in the market, honeycomb catalyst, plate-types catalyst and corrugated catalyst. This paper firstly describes the preparation of the three types of catalysts, and then analyzes their performance. The analysis indicates the catalyst structure plays an important role on their performance. The honeycomb catalyst and plate-type catalyst are widely utilized in world’s coal power station, which should be due to their excellent capabilities of ash prevention, wear resistance and anti-poisoning.

Abstract: Fast pyrolysis of biomass to produce bio-oil is one of the most promising technologies to utilize lignocellulosic biomass. Liquid bio-oil covers many potential application fields, to be used a fuel or a source for chemical extraction and production. Hence, it is necessary to understand the chemical properties of bio-oil. This review concentrates on the elemental and chemical properties of bio-oil, and also discusses the analysis and separation methods.

Abstract: Direct Torque Control (DTC) has an important role in current motor control. This paper focus on its torque ripple of the reference vector made, summarize a 5 levels structure and novel strategy. This strategy can generate one 5-level, sectors subdivision’s vector table and select the best vector to obtain the best effect. On this basis, combined with adapted genetic algorithm and calculate optimal parameters for the speed controller. In the end, give an example of induction motor. The results show that: the conclusion is correct, the control structure is simple, clear and perform significantly. It means that the strategy is feasibility and correct.

Abstract: An electromechanical control system of a novel bioreactor for ligament tissue engineering, combined with culture medium perfusion control, cyclic mechanical loading and displacement coordinated control, strains and temperature measure and control, based on programmable logical controller (PLC), was designed and implemented. Well-controlled mechanical stimulations (resolution of <0.01mm for translational and <0.1° for rotational strains, cyclic loading frequency of up to 1 Hz) could be applied to the growing tissue, especially to the tissue engineered anterior cruciate ligaments (ACLs). The novel control system could complete detection and control functions of multi-dimensional mechanical strain in the same axis (resolution of 0.01N for tension and 0.01Nm for torsion strains). An online parameter measuring device of PO2 ，which did not consume oxygen and independent of flow rate, and were incorporated into the culture medium recirculation loop, was designed. The displacement and mechanical stimulate coordinated control strategies were achieved. The aim of this control system is to meet the functions of bioreactor for the ACLs tissue engineering in both research and clinical applications.

Abstract: This paper proposes gain boosting architecture of a rail-to-rail folded cascaded operational amplifier with CMFB scheme that employing fully differential pair amplifier for applications to biomedical signal process. The proposed rail-to-rail folded cascaded single stage OPA is design and implemented using the TSMC 0.35μm CMOS 2P4M process. Based on simulated and measured results , the chip size is with power dissipation about 1.6mW, input common mode votage range from 0V to 3.3 V, maximum DC gain 82 dB, 114 dB CMRR and 86 dB PSRR.

Abstract: Based on the positional characteristic of ellipticorbit of four-bar linkage, we develop a device to support rehabilitation of a patient’s lower limb’s motion in two-dimensional plane. In addition, we use ADAMS software to analyze two aspects parameters. One aspect is about the horizontal and vertical displacement of four-bar mechanism of ellipticorbit. The other simulation is about angles θ₁ (angle between thigh and the horizontal) and θ₂ (angle between thigh and calf). Before using the device, we install them in both sides of a normal chair. Driven by electric motor, lower limbs can follow the trajectory to do rehabilitation exercise. Long-term exercise can help a patient to repair damaged muscles.

Abstract: On account of pests and diseases in greenhouse, solar cells were used for energy. Ozone was generated by corona discharge during the day which used to kill bacteria, viruses, fungi in greenhouse. Use the phototaxis lure insects with blue-violet LED, high power electrical shock to kill flying insects in the evening. Thereby reduces crop diseases and pests and reduces pesticide use. Greenhouse diseases and pests therapeutic instrument of solar consist of power supply module, ozone generator module, high voltage pest control modules. Paper focuses on the principles of the design, tentative design, function test and measurement data analysis.

Abstract: Molecular imprinted polymers were synthesized using α-methylacrylacid as monomer, acetylsalicylic acid as template. Polyethylene glycol dimethylacrylate was taken as cross-linker. UV-Vis spectrophotometer was used to detect the drug-loading and releasing performances of these polymers. The studies showed that the imprinted polymers could load more drugs than non-imprinted polymer, and exhibited a slower drug-releasing rate than the latter at pH 7.4. The content of cross-linker had influences on drug-loading amounts. The imprinted polymer released few drugs at the buffer solution of pH 1.2.