基于神经网络的管件开式冷挤压相对伸长量预测

为了预测各参数组合下的无芯棒开式冷挤压厚壁管件的伸长量，拓展开式冷挤压的实验结果，建立了无芯棒开式冷挤压厚壁管件的伸长量预测的神经网络模型，通过实验结果与预测结果的比较，二者吻合良好，为深入研究开式冷挤压工艺，建立开式冷挤压工艺设计专家系统提供了新的思路。     

超幂及其在Banach空间中的应用

利用超幂这一工具讨论了 Ｂａｎａｃｈ 空间上的一些性质与其可分子空间上性质的相互体现，给出了超自反空间的一个等价命题．     

玉米油掺伪通用检验方法研究

采用玉米油、棉清油、菜籽油、棕榈油、大豆油、亚麻油为材料,分析其油脂脂肪酸组成；着重研究了玉米油掺入其它油品后脂肪酸组成的变化规律和掺伪量的计算方法,为玉米油掺伪检验提供了依据.     

浅谈热力管网工程施工工艺与质量控制

热力管网工程的施工工艺复杂,而且每一道工艺都非常严格.所以在施工过程中须严格规范规定的施工工艺操作.     

Tracking error reduction in CNC machining by reshaping the kinematic trajectory

In this paper, a method of reducing the tracking error in CNC machining is proposed. The structured neural network is used to approximate the discontinuous friction in CNC machining, which has jump points and uncertainties. With the estimated nonlinear friction function, the reshaped trajectory can be computed from the desired one by solving a second order ODE such that when the reshaped trajectory is fed into the CNC controller, the output is the desired trajectory and the tracking error is eliminated in certain sense. The proposed reshape method is also shown to be robust with respect to certain parameters of the dynamic system.     

石油污染黄土生物修复影响因素的室内试验

通过向石油污染土样中投加微球菌,对石油污染黄土生物修复的影响因素(污染强度、调理剂、含水率、投菌量等)进行室内试验研究.试验结果表明:污染强度为6g/kg、添加麦皮、含水率为20%、投菌量为40mL/kg时,污染土样中石油的降解率最大.     

手机报必须找准定位才有市场

国家鼓励数字化新兴媒体建设,迅猛崛起的手机媒体给新闻传播事业的发展带来了新的空间.手机报以其信息传播的及时性、针对性、个性化、广泛性、互动性等特点,目前已开始成为新闻传播的新载体.但手机报发展还存在一些问题,需要从市场细化、内容为主、消费习惯、部门协调、市场营销、互动服务等几个方面改进和加强.     

A novel data embedding method for H.264 stereo video codec with joint prediction scheme

It is important to reduce data redundancy of stereo video in practical applications. In this paper,first,a data embedding method for stereo video(DEMSV) is investigated by embedding the encoding data into the reference frame to encode stereo video. It can use only one channel to transfer all the video data and the receiver can choose a monocular video decoder or stereo video decoder adaptively. Then,introducing the joint prediction scheme in the coding process of DEMSV,we propose a novel data embedding meth...     

Construction of a bacterial artificial chromosome library for Gossypium herbaceum var. africanum

Gossypium herbaceum var. africanum is the only wild cotton species within the cultivated diploid G. herbaceum. As the A sub-genome donor of tetraploid cotton, it is characterized by its resistance to insects, diseases, and other adversities. We have constructed the first bacterial artificial chromosome library (BAC) for G. herbaceum var. africanum. With high quality and broad coverage, this library includes 75000 clones, with an average insert size of about 115 kb and fewer than 4% empty clones. Our library is approximately five-fold the size of the A-genome (1667 Mb) and it provides 99.3% probability for isolating genes of interest or their sequences. Using nine SSR markers that are located on five different chromosomes and linked with resistance to Verticillium wilt, seven of nine could amplify the 40 superpools and got 1-14 hits. Because of its moderate wide coverage and relative large insert size, this library will be an important genomic resource for classifying and analyzing the evolution of cotton species, as well as for isolating disease-resistance genes and control elements.     

遍历流的局部熵

定义了一种新的遍历流熵和局部熵,并证明在流无不动点时新的(局部)熵跟前人定义的熵是一致的,其结果是对遍历流复杂性的另一种等价刻画.