步行街空间界面和商业氛围的营造

针对步行街混乱和急功近利的状态，分析空间界面的人性化、整体性与统一性、丰富性与多样性、文化性与地方性，提出营造好的空间界面和商业氛围的方法，以便做到资源优化配置，最佳使用。     

环境噪音的防治与减弱

介绍了噪音的来源及防治噪音的必要性,对街道绿地、公共绿地、特殊绿地等绿地的减噪作用进行了阐述,以减弱噪音的影响,提高环境质量。     

The calibration of a system for measuring the transmission of the atmosphere for laser radiation

A method of calibrating a system for measuring the transmission of laser radiation through the atmosphere along paths about 1 km long is proposed and tested on a model “experiment.” Translated from Izmeritel'naya Tekhnika, No. 9, pp. 52–54, September, 2008.     

多晶硅生产的节能减排措施

针对多晶硅生产中氯硅烷副产物的特性,采用先进的回收技术,将大量副产物转化为生产原料,大大降低了生产成本,同时减少了污染物排放量.     

浅谈爆炸危险环境的电气设计

本文从防爆区域划分、防爆电气设备的种类和特点、爆炸危险环境中电气设备选型三个方面简要介绍易爆危险环境中电气设计。     

超高压往复压缩机机体振动分析

针对某塑料厂乙烯超高压二次往复压缩机振动大、噪声污染严重的问题,运用有限元分析软件ANSYS对在役超高压往复压缩机进行了结构模态分析和动力响应分析,找到了压缩机振动的原因,并提出了一套减振方案,方案实施后减振降噪效果明显,最大降幅达76．8％,为超高压往复压缩机的减振降噪提供了参考。     

A numerical approach for planning offshore wind farms from regional to local scales over the Mediterranean

Renewable energy resources, such as wind, are available worldwide. Locating areas with high and continual wind sources are crucial in pre-planning of wind farms. Vast offshore areas are characterized by higher and more reliable wind resources in comparison with continental areas. However, offshore wind energy production is in a quite preliminary phase. Elaborating the potential productivity of wind farms over such areas is challenging due to sparse in situ observations. The Mediterranean basin is not an exception. In this study we are proposing numerical simulations of near-surface wind fields from regional climate models (RCMs) in order to obtain and fill the gaps in observations over the Mediterranean basin. Four simulations produced with two regional climate models are examined here. Remote sensing observations (QuikSCAT satellite) are used to assess the skill of the simulated fields. A technique for estimating the potential energy from the wind fields over the region is introduced. The wind energy potential atlas and the map of a wind turbine's functional range are presented, locating the potentially interesting sub-regions for wind farms. The ability of models to reproduce the annual cycle and the probability density function of wind speed anomalies are detailed for specified sub-regions.     

无钴镍基正极材料LiNi_(0.8)Mn_(0.2)O_2的制备及电化学性能研究

采用共沉淀法合成球形前驱体Ni_(0.8)Mn_(0.2)(OH)_2,混合LiOH·H_2O通过高温烧结制备出锂离子电池镍基正极材料LiNi_(0.8)Mn_(0.2)O_2。通过X射线衍射(XRD)、扫描电镜(SEM)、热重-差热分析(TG-DTA)以及恒电流充放电测试对材料进行表征,研究了烧结温度和烧结气氛对材料结构、形貌和电化学性能的影响。结果表明:800℃纯氧气氛(0.6L/min)下煅烧12h合成的材料晶型完整,是典型的六方晶系α-NaFeO_2型结构;SEM测试显示材料平均粒径在10μm左右;电化学性能测试显示材料在25℃、2.75~4.20V、0.2C充放电条件下,首次放电比容量达173.6mAh/g,循环95次后,容量保持率达90.73%。     

Extending the shelf life of kohlrabi stems by modified atmosphere packaging

ABSTRACT:  Kohlrabi stems (without leaves) were stored under modified atmosphere packaging (MAP) for 60 d at 0 °C. An additional retail sale period of 3 d at 12 °C after each cold storage evaluation (30 and 60 d) was applied. Under high relative humidity (RH) and 0 °C, the stems showed low metabolic activity, as no changes in sugars and organic acids were found. From day 21 at 0 °C, air-stored stems showed a yellowing of stalks and later they fell down. This disorder severely affected the appearance of stems. A gas composition of 4.5 to 5.5 kPa O₂ plus 11 to 12 kPa CO₂ was reached using antimist oriented polypropylene plastic bags of 20-μm thicknesses. The stems in MAP conditions kept a high sensorial quality. It was enough for commercial purpose of 2 mo. The storage of kohlrabi stems in plastic bags, either MA or in perforated (control) packages, provided an additional protection reducing physical damage. The MAP conditions delayed the weight loss and development of bacterial soft and black rot, extending the shelf life of kohlrabi stems to 60 d at 0 °C plus 3 d at 12 °C. Stems are not chilling injury sensitive.     

Effect of illumination on the display life of fresh pork sausages packaged in modified atmosphere. Influence of the addition of rosemary, ascorbic acid and black pepper

Pork forelegs were used for manufacturing fresh sausages, treated with different natural antioxidants (rosemary, ascorbic acid and black pepper), packaged in 80% O₂ + 20% CO₂ atmosphere and displayed at 2 ± 1 °C under different lightings (darkness, standard fluorescent, low-UV colour-balanced lamp and standard fluorescent plus a UV-filter). Two packs for each treatment were opened every 4 days for subsequent analysis of colour CIE L^∗, a^∗, b^∗, TBARS, microbial psychrotrophic aerobes and sensory discolouration and off-odour. Lighting with standard fluorescent was highly deleterious for sausage display life, which fell from 12 to 8 days due mainly to early discolouration. Inserting a UV-filter extended display life to 12 days, while the use of a low-UV lamp was not effective in protecting from discolouration. Addition of rosemary plus ascorbic acid, in the absence of black pepper, retarded discolouration only in sausages illuminated with the UV-filter, reaching a display life of 16 days, equal to that of sausages maintained in the dark.