基于KMM匹配的参数迁移学习算法

当训练数据和测试数据来自不同的领域或任务以至于训练数据和测试数据的分布不相同时,需要进行知识的迁移.本文提出一种基于实例KMM匹配的参数迁移学习方法.利用KMM算法估计每个源领域实例的权重,再利用得到的权重,把这些实例应用到基于参数的迁移学习方法中.把该迁移学习算法应用到无线网络定位问题中时,该方法的定位准确度要高于单独从实例或是从参数出发的迁移学习方法.     

公众参与城镇居民生活用水水价探析

水价是引导水资源合理配置,促进节水型社会建设的有效手段之一。公众参与水价制定是供水方、用水方和政府共同参与,既能够客观全面反映水资源价值、供水成本、环境成本在内的,又能充分代表用水方利益的新型水资源价格形成模式。应用公众参与水价制定理论,以新疆石河子市为例,通过抽样问卷调查、分析、综合评价等途径对研究区生活用水进行了定价探析。结果表明：公众参与制定的石河子市生活用水水价更能反映其水资源的稀缺性,通过宣传教育来逐步提高现状水价,充分利用价格杠杆的约束效应来构建节水型社会是该市当前水务改革的重点。     

Kinematic analysis of a stabilized parallel mechanism platform for satellite communication 

The 3 RPS parallel mechanism under unsteady conditions was studied. By establishing geographical coordinate systems and connecting the position of the stabilized platform with the motive vector, operational formulas between normal vectors in upper and rod length were deduced, and the inverse solution derived. The character of velocity and acceleration was analyzed and the trajectory of work space plotted. Analysis indicates the time function of the rod length and the surface of the work space's trajectory are smooth, and no singular position has been found.     

高校图书馆网上图书荐购系统的比较与分析

分析了64所重点大学图书馆的网上图书荐购情况,从功能模块的设计等方面对几种具有代表意义的网上图书荐购方式进行了比较,为图书荐购系统的设计提供参考。     

长链非编码RNA研究现状与趋势的文献计量分析

分析了Web of Science 2003-2012年收录的长链非编码RNA（long non-coding RNA 或long noncoding RNA, lncRNA）文献的发表时间、期刊分布、国家/地区分布、机构分布和学科分布,探讨了lncRNA文献的分布规律,评价了其研究阶段并预测了其未来发展,为我国lncRNA的相关研究提供参考。     

一种新的模拟电路故障特征提取与诊断方法

基金经理在选择投资组合风险时,不仅会考虑基金的业绩排名,同时会考虑基金业绩之间的差距,由此提出了业绩差距排名,并提出了新的实证方法,即线性回归的方法来研究业绩差距排名对基金经理风险承担的影响,同时验证了BHS结论在中国基金市场中的适用性。结果表明BHS结论在中国基金市场中是不成立的,同时表明在中国基金市场中基金经理具有相对业绩排名目标,但此相对业绩排名是本文中所提出的业绩差距排名,此结论可以为监管部门规范基金投资行为以及为投资者选择基金提供参考。     

加工路径段进给速度的转接及加减速处理方法

针对高速高精加工对数控系统在进给速度控制方面的要求,根据相邻路径段间的转接角大小建立了可直接进行段间转接的条件,并研究了该条件不成立时对转接速度的修正问题.提出了段内加减速的处理基本原则,并在保持路径段长度不变的基础上对路径段内的进给速度重新进行规划,避免了以往插补前加减速方法中减速点和终点预测困难的问题.实际计算结果表明,相对零速度转接加减速处理方法,所提出的方法在同样保证加工精度等基础上提高了加工效率(每段约2%),在高速加工系统中可以得到较好应用.     

Fuel ethanol preparation from straw stalks usingsimultaneous saccharification and fermentation 

The effects of temperature, time, inoculating quantity and dosage of cellulose enzyme on the preparation of fuel ethanol from straw stalks by means of the simultaneous saccharification and fermentation method (SSF) were studied. The results show that after pretreating straw stalk by mechanical comminution and sparse sulfuric acid, the optimal fermenting temperature is 38 ℃, the fermenting period is 72 h, the inoculating quantity is 10%, the dosage of cellulose enzyme is 40 IU/g, and the ratio of Pachysolen tannophilu to saccharomyces cerevisiae is 2∶1. The ethanol yield reaches as high as 0.20 g/g.     

Composite structure of sterilization and descaling system for circulating cooling water

In order to resolve the hazard of biofouling and scale in circulating cooling water system of power stations, this paper takes the lead in combining high voltage pulses and high frequency pulses for sterilization and descaling process. It analyzes both electromagnetic effects and biochemical effects on sterilizing and descaling process caused by the high voltage pulses and high frequency pulses respectively. The pulse generator is designed according to the requirements of electromagnetic parameters for effective operation. The design and improvement of process chambers are assisted by electromagnetic field simulation technology. Experimental data prove that the system can output high voltage pulse whose maximum peak value reaches 7 kV and high frequency pulse whose maximum peak value reaches 100 V the frequency ranges from 500 kHz to 2 MHz. The rate of sterilization can be as high as 91,and the rate of descaling reaches 71. This system is expected to achieve the standards of industrial water treatment through further research.     

Restoration algorithm with wavelength reservation collision avoidance in ASON

Aiming at the problem of link fault restoration in ASON, an improved equalizing routing algorithm (ERA) is introduced to proportion the load at the routing phase. In order to solve the easy blocking problem for the network without wavelength converter because of the wavelength continuity constraint, the algorithm WRCA is proposed at the wavelength assignment phase. This algorithm is realized by adding collision detection object (CDO) in the path message of the resource reservation protocol with traffic engineering extension (RSVP TE). Depending on the value of the CD flag, different wavelength selection strategies are applied at the destination node, and the blocks resulting from wavelength reservation collision are reduced. The simulation experiments compare four wavelength assignment algorithms with the same routing algorithm ERA. The results show that compared with the traditional first fit algorithm (FF) and random fit algorithm (RD), the FF and RD employing CD scheme can effectively reduce the blocking ratio of the whole network, and enhance the practical applicability of the restoration algorithms.