A new modulation technique and compensation algorithm for mainstream CO2 capnography

Carbon dioxide, as a metabolic product of human, is correlated with a patient’s perfusion and ventilation. In medicine, the end-tidal carbon dioxide partial pressure refers to the measurement of exhaled carbon dioxide, and end-tidal carbon dioxide partial pressure monitoring has become an important tool in clinical monitoring. However, there are some aspects needed to be improved. So, the low-frequency modulation is used to reliably acquire the respiration information. The measurement method is improved based on the Lambert–Beer Law. Also, we compensate the initial absorbance because of the light absorbance of the sensor at different wavelengths. The influence of the temperature change is analyzed on the measurement. All of these methods make the end-tidal carbon dioxide partial pressure accurate and convenient.     

Rough ν-support vector regression

After combining the classical ν-SVR with the rough theory, we propose a rough ν-SVR. Double εs are utilized to construct the rough margin for rough ν-SVR instead of single ε for the classical ν-SVR, and this rough margin consisting of positive region, boundary region, and negative region yields the feasible set of the rough ν-SVR larger than that of the classical ν-SVR, which makes the objective function of the rough ν-SVR not more than that of the classical ν-SVR. This may lead to the improvement of the performance. Meantime, experimental results on benchmark data sets confirm the validation and feasibility of our proposed rough ν-SVR.     

Influence of culture pH on freeze-drying viability of Oenococcus oeni and its relationship with fatty acid composition

To achieve successful malolactic fermentation in wine making, expanding interest in ready-to-use concentrated Oenococcus oeni starter culture has placed greater emphasis on developing starter production and preservation methods. The effect of growth factors on the survival of the O. oeni cells after lyophilization and its relationship with the membrane fatty acid composition were investigated. O. oeni cells in the early stationary phase survived better after freeze-drying than those in the mid-exponential phase, and those early stationary phase O. oeni cells cultured in designed ATB, FMATB and MATB growth media with different pH buffering capabilities exhibited different freeze-drying viabilities. Results concerning both membrane fatty acid composition and freeze-drying viability of O. oeni cells grown in those three media at initial culture pH 4.8, 4.0, 3.5, 3.2 were subjected to correlation analysis, indicating a decrease of the growth pH improved the freeze-drying survival of O. oeni cells, which was correlated with the enrichment of C19cyc11 and the decrease of C16:0 in the membrane lipids. A better understanding of the mechanisms of O. oeni resistance to lyophilization could rationalize their exploitation to prepare commercial starter cultures.     

Optimizing the use of aeromagnetic data for predictive geological interpretation: an example from the Grenville Province,Quebec

Predictive geological mapping relies largely on the empirical and statistical analysis of aeromagnetic data. However, in most applications the analysis remains essentially visual and unconstrained. The lithological and structural diversity of rock units underlying the Mingan Region make it an ideal test area to apply more rigorous approaches to magnetic data processing and interpretation, and to assess their usefulness and limitations. In the application discussed here, various derivatives and transformations of the total field magnetic data are evaluated empirically by photo-interpretation using a Geographic Information System. We show that rock types are best represented using the total field and vertical derivative of the magnetic data, whereas contacts between rock types are best delineated using the horizontal derivative of the total field and the analytic signal. In addition, the maxima of the analytic signal are used to estimate the direction of dip of large-scale geological units. Statistical analyses show that the correlation between geology and magnetic data is not directly proportional. Finally, the source of discrepancies between mapped geological units and magnetic response are evaluated through theoretical data modeling of representative geological bodies.     

Development of partial-charge potential for GaN

Partial-charged potentials for GaN are systematically developed that describe a wide range of structural properties, where the reference data for fitting the potential parameters are taken from ab initial calculations or experiments. The present potential model provides a good fit to different structural geometries and high pressure phases of GaN. The high-pressure transition from wurtzite to rock-salt structure is correctly predicted yielding the phase transition pressure of about 55 GPa, and the calculated volume change at the transition is in good agreement with experimental data. The results are compared with those obtained by ab initio simulations.     

通过Dreamweaver MX2004的操作实现动态信息发布系统的设计

传统的信息发布系统主要是通过采用网页编辑工具结合编写某种动态技术的源代码来实现的,本文详细的介绍了如何通过DreamweaverMX2004的操作来代替手写代码,进而实现基于ASP技术的信息发布系统。     

巡航导弹飞行捷径、高度及速度对突防影响的仿真研究

研究巡航导弹航迹规划中飞行捷径、高度及速度3个关键性因素，重点是通过仿真给出在其约束条件下巡航导弹突防的概率．通过大量实验和作战仿真得出单枚巡航导弹对歼击机火力单元突防的概率随航路捷径、高度以及速度变化的规律和数学模型．     

处理信息安全突发事件的多Agent分布式协同管理机制

本文根据网络信息安全突发事件的分布式、变化性及难以预测的特点,从Agent的概念及结构特点出发,提出了多Agent信息安全协同管理机制。通过一个简单的实例来说明多代理对突发事件的响应及协同规则的执行过程,并给出相应的协同规则示意图和Agent合作活动状态转移图。     

Measurements of Enthalpy Change of Reaction of Formation, Molar Heat Capacity and Constant-Volume Combustion Energy of Solid Complex Yb（Et2dtc）3（phen）

A ternary solid complex Yb(Et2dtc)3(phen) was obtained from the reaction of hydrous ytterbium chloride with sodium diethyldithiocarbamate (NaEt2dtc), and 1, 10-phenanthroline (o-phen·H2O) in absolute ethanol.The bonding characteristics of the complex were characterized by IR.The result shows Yb3 bands with two sulfur atoms in the Na(Et2dtc)3 and two nitrogen atoms in the o-phen.The enthalpy change of liquid-phase reaction of formation of the complex ΔrHθm (l), was determined as being (-24.838±0.114) kJ·mol-1 at 298.15 K, by an RD-496 Ⅲ type heat conduction microcalormeter.The enthalpy change of the solid-phase reaction of formation of the complex ΔrHθm (s), was calculated as being (108.015±0.479) kJ·mol-1 on the basis of an appropriate thermochemistry cycle.The thermodynamics of liquid-phase reaction of formation of the complex was investigated by changing the temperature during the liquid-phase reaction.Fundamental parameters, the activation enthalpy, ΔHθ≠, the activation entropy, ΔSθ≠, the activation free energy, ΔGθ≠, the apparent reaction rate constant k, the apparent activation energy E, the pre-exponential constant A, and the reaction order n, were obtained by a combination of the reaction thermodynamic and kinetic equations with the data from the thermokinetic experiments.At the same time, the molar heat capacity of the complex cm, p, was determined to be (86.34±1.74) J·mol-1·K-1 by the same microcalormeter.The constant-volume combustion energy of the complex, ΔcU, was determined to be (-17954.08±8.11) kJ·mol-1 by an RBC-Ⅱ type rotating-bomb calorimeter at 298.15 K.Its standard enthalpy of combustion, ΔcHθm, and standard enthalpy of formation, ΔfHθm, were calculated to be (-17973.29±8.11) kJ·mol-1 and (-770.36±9.02) kJ·mol-1, respectively.