Numerical study on the loss of fast ions produced by minority ion cyclotron resonance heating in EAST

The classical prompt loss of fast ions produced by minority ion cyclotron resonance heating(ICRH)is studied by a guiding center orbit following code in the Experimental Advanced Superconducting Tokamak(EAST).It is found that the loss of fast ions produced by ICRH mainly appears in both ends of the resonance layer,while the loss of fast ions in the middle resonance layer is very small.The dominant fast loss comes from trapped ions,rather than from passing ions.Controlling the location of resonance layer at the plasma core may be more beneficial to the EAST tokamak ICRH.In addition,the loss distribution of fast ions is studied.The results show that the fast ions are mainly lost near the midplane in the poloidal direction,but almost uniformly in the toroidal direction.Moreover,we investigate the dependence of fast ion loss on the ICRH power.The simulation results show that the loss fraction of fast ions in both ends of the resonance region increases with the ion cyclotron range of frequencies(ICRF)power,but barely affects the loss of fast ions in the middle region.     

入侵检测系统中基于三维规则链表的规则解析方法

入侵检测系统的规则解析效率直接影响到入侵检测系统的性能,文章在对入侵检测系统Snort的规则解析进行了分析以后,提出了一种三维链袁规则解析方法,并详细介绍了这种规则解析方法的数据结构.该方法既可节省存储空间,又加快了对每个包的处理时间.     

基于Moodle和PhoneGap的移动学习客户端的设计与应用研究

本文将结合用户移动学习现状及偏好,确定移动学习客户端的系统需求,进而基于Moodle和PhoneGap平台,实现对移动学习客户端的设计,并将移动学习客户端应用到实际教学过程中,确定应用成效。     

Estimation method of state-of-charge for lithium-ion battery used in hybrid electric vehicles based on variable structure extended kalman filter

Since the main power source of hybrid electric vehicle(HEV) is supplied by the power battery, the predicted performance of power battery, especially the state-of-charge(SOC) estimation has attracted great attention in the area of HEV. However, the value of SOC estimation could not be greatly precise so that the running performance of HEV is greatly affected. A variable structure extended kalman filter(VSEKF)-based estimation method, which could be used to analyze the SOC of lithium-ion battery in the fixed driving condition, is presented. First, the general lower-order battery equivalent circuit model(GLM), which includes column accumulation model, open circuit voltage model and the SOC output model, is established, and the off-line and online model parameters are calculated with hybrid pulse power characteristics(HPPC) test data. Next, a VSEKF estimation method of SOC, which integrates the ampere-hour(Ah) integration method and the extended Kalman filter(EKF) method, is executed with different adaptive weighting coefficients, which are determined according to the different values of open-circuit voltage obtained in the corresponding charging or discharging processes. According to the experimental analysis, the faster convergence speed and more accurate simulating results could be obtained using the VSEKF method in the running performance of HEV. The error rate of SOC estimation with the VSEKF method is focused in the range of 5%to 10%comparing with the range of 20%to 30%using the EKF method and the Ah integration method. In Summary, the accuracy of the SOC estimation in the lithium-ion battery cell and the pack of lithium-ion battery system, which is obtained utilizing the VSEKF method has been significantly improved comparing with the Ah integration method and the EKF method. The VSEKF method utilizing in the SOC estimation in the lithium-ion pack of HEV can be widely used in practical driving conditions.     

分析化验技术及标准在天然气处理厂中的应用

简要介绍了天然气的分类,及天然气处理过程中相关气体、液体及固体样品的分析测试方法和标准。论述了相关分析化验技术及标准在国内、外有代表性的两个大型天然气处理厂新疆大北项目和土库曼斯坦南约洛坦项目中的应用。     

Peanut milk and peanut milk based products production: a review

Since the early 1950s, numerous reports have been published suggesting that peanut milk and peanut milk based products can be prepared in a wide variety of ways. Emphasis has shifted from preparing inexpensive milk like beverages, very nutritious but somewhat lacking consumers appeal, to using the peanut milk or peanut protein isolates as an animal milk extender without changing flavor, to develop more attractive fermented products, and to precipitate proteins from the milk in order to get a curd called "tofu," and to produce cheese analogs. Great attention has been paid to the improvement of the stability, sensory properties, and shelf-life of the milk, using physical and chemical treatments. Many efforts have been deployed for supplementing the products. Thanks to recent advances, the removal of aflatoxin from peanut milk can be achieved using Flavobacterium aurantiacum as a biodegradater. It has also found application as liquid coffee whitener. However, despite all these developments and publications, there is still a need for much more diversified studies in order to definitely overcome the stability, the nutty flavor, and sensory problems always encountered when producing peanut milk and some peanut milk based products.     

电热水器选购之我见

众所周知，电热水器进入我国居民家庭中只是近几年的事情，但根据中国家用电器商业协会资料显示，国内电热水器市场需求正在逐渐扩大，在市场上也占六成，今后也将出现持续均衡的增长。出现这种现象主要有以下几方面的原因：     

WDER650钛成分控制工艺改进及应用

武钢第二炼钢厂冶炼WDER650时钛成分不合格必须回炉。原来冶炼WDER650的工艺路线是：转炉出钢过程中，FeTi随其它合金一起加入到大罐，钢水出完后到吹氩站微调成分。由于不同炉次钢水氧化性强弱不同，FeTi收得率不稳定，成分波动较大，在吹氩站调整时仍有钛成分调整不当，导致钛低回炉及钛成分在边缘值的炉数较多。改进后的工艺路线为：出钢前进行预脱氧，出完后到吹氩站加铝线吹氩，钢水氧含量大大降低，再加入FeTi，收得率非常稳定，获得了良好的效果。     

缓慢冷却工艺对高强度冷轧双相钢组织性能的影响

研究了缓慢冷却速度和缓慢冷却终止温度对C—MnCr系冷轧双相钢的显微组织和力学性能的影响。结果表明,随缓慢冷却速度的增加,试验钢的强度增加,伸长率则减小,屈强比变化不大,均在0．46左右。在不同缓慢冷却速度下,试验钢的显微组织均由铁索体和马氏体组成,随着缓慢冷却速度的增加,晶粒尺寸逐渐减小,马氏体体积分数明显增多。铁素...     

不等温热成形B柱对汽车侧碰性能的影响研究

热成形B柱已经成为各大汽车制造商应对越发严峻侧碰法规的有效手段,随着热成形技术的发展,不等温热成形工艺已经成为了研究的热点。在侧碰过程中不等温热成形工艺生产的B柱与传统热成形工艺生产的B柱对车身结构的影响略有不同。利用鞍钢生产的22MnB5材料,对三种不等温热成形工艺处理的材料进行了性能测试,并将测试结果导入整车模型进行运算,最后对B柱上段加速度、B柱的侵入量和B柱的吸能情况进行了评估。