企业仿生态系统特性与负熵流资源利用分析

基于可持续发展思想和企业资源管理系统管理思想,从热力学系统角度引入负熵流资源的概念,在分析了负熵流资源与地球生命系统和企业资源管理系统关系的基础上,借鉴生态系统食物链机制,引入企业仿生态系统来构建企业负熵流资源梯次利用模型,以对循环经济在中观和微观层面的实践有所帮助。

企业资源管理系统的仿生态系统特性分析与应用

本文首先从企业系统、企业资源系统和企业资源管理系统的热力学角度引入负熵概念,并在分析了资源和企业资源的热力学涵义的基础上,试图通过分析企业资源管理系统的仿生态系统特性来寻求有效利用企业资源的方法;然后利用企业资源管理系统的仿生态系统食物链模型对梯次利用企业资源的企业集群产业链进行拟合,从微观层面和中观层面解释了循环经济生产模式的运行机理;最后通过分析天津经济开发区(Tianjin Economicand Technological Development Area,TEDA,译称“泰达”)生态工业园高效利用水资源的实证案例来揭示应用企业资源管理系统仿生态系统特性来实践循环经济中观和微观运行模式对企业资源合理利用的意义所在。此文根植于可持续发展和企业资源系统管理思想,提出的企业资源管理系统仿生态系统特性和在此基础上建立的企业资源梯次利用模型,在理论和实证方面佐证了循环经济思想在中观和微观层面的实践意义。

基于生态模式的服务管理系统及其形式化构建

针对制约面向服务架构发展的Web服务管理瓶颈问题,从服务管理的角度提出一种以服务为中心的面向服务架构,把服务资源系统的管理和演化作为核心,着重研究系统中服务的能力描述和服务间关系的维护。给出了系统基于生态模式的形式化描述方法和构建算法,可由计算机自动构建服务资源系统的全局模型,并实现服务个体及个体间关系的自动维护。实验表明,以服务为中心的面向服务架构的服务系统具有较好的运行稳定性和检索查全率。

Wheeled foot quadruped robot HITAN-I

In view of the robot running environment, the structure of wheeled foot and quadruped are adopted in this robot system, which combines the priorities of both wheeled robot and legged robot. Based on CAN bus, the two-class robot control system using multiple controllers and drivers is constructed. At the same time, serial inverse kinematics of swaying leg and parallel inverse kinematics of supporting legs are analyzed independently. The forward gait and turning gait are planned and experiment image is given at last.

Efficiency of Combined Solar Thermal Heat Pump Systems

In this project, different combinations of solar energy and heat pump systems for preparation of DHW （domestic hot water） and space heating of buildings are analyzed through dynamic system simulations in TRNSYS （Transient System Simulation Program）. In such systems, solar thermal energy can be used, on one hand, directly to charge the buffer storage and, on the other hand, as heat source for the evaporator oftbe HP （heat pump）. In this work systems, in which solar heat is only used directly （parallel operation of solar and HP）, systems using the collectors also as a heat source for the HP are analyzed and compared to conventional air HP systems. With a combined parallel solar thermal HP system, the system performance compared to a conventional HP system can be significantly increased. Unglazed selectively coated collectors as source for the HP have the advantage that the collector can be used as an air heat exchanger. If solar radiation is available and the collector is used as source for the HP, higher temperatures at the evaporator of the HP can be achieved than with a conventional air HP system.

Simulation and analysis for anthropogenic heat release

Heat balance of urban ecosystem is a key point for the study of urban climate and micro-climate pattern and its change mechanism. Urban heat island effect is becoming increasingly serious,which is mainly caused by the change of the earth's surface cover and the anthropogenic heat release. In this study,the simulation experiment for the anthropogenic heat release was designed according to the heat balance principle. A set of buildings of miniature city were used to constitute the residential area,U grooves were applied to simulate the single building,and the fluorescent lamps in the U groove were regarded as the heat sources of the anthropogenic heat release. The simulation experiment was launched with long-short wave sun photometer,sonic anemothermometer and heat flow gauge in the experiment site. Then the net solar radiation,sensible heat flux and heat flux into the ground were determined. The quantities of the anthropogenic heat release were calculated based on the heat balance principle,and were compared with the theoretical power consumption of the fluorescent lamps. The root mean square error( RMSE) of the simulation for the anthropogenic heat release reaches0. 078 W·m- 2,a comparatively high precision,which showes that the anthropogenic heat release can be accurately determined through the simulation experiments. This study provided a scientific method for the purpose of monitoring the anthropogenic heat release.

Soil Respiration of Biologically-Crusted Soils in Response to Simulated Precipitation Pulses in the Tengger Desert, Northern China

Soil respiration(SR) is a major process of carbon loss from dryland soils, and it is closely linked to precipitation which often occurs as a discrete episodic event. However, knowledge on the dynamic patterns of SR of biologically-crusted soils in response to precipitation pulses remains limited. In this study, we investigated CO_2 emissions from a moss-crusted soil(MCS) and a cyanobacterialichen-crusted soil(CLCS) after 2, 4, 8, 16, and 32 mm precipitation during the dry season in the Tengger Desert, northern China.Results showed that 2 h after precipitation, the SR rates of both MCS and CLCS increased up to 18-fold compared with those before rewetting, and then gradually declined to background levels; the decrease was faster at lower precipitation amount and slower at higher precipitation amount. The peak and average SR rates over the first 2 h in MCS increased with increasing precipitation amount, but did not vary in CLCS. Total CO_2 emission during the experiment(72 h) ranged from 1.35 to 5.67 g C m-2 in MCS, and from 1.11 to3.19 g Cm^(-2) in CLCS. Peak and average SR rates, as well as total carbon loss, were greater in MCS than in CLCS. Soil respiration rates of both MCS and CLCS were logarithmically correlated with gravimetric soil water content. Comparisons of SR among different precipitation events, together with the analysis of long-term precipitation data, suggest that small-size precipitation events have the potential for large short-term carbon losses, and that biological soil crusts might significantly contribute to soil CO_2 emission in the water-limited desert ecosystem.