影响高速公路互通式立交选型的交通条件

立交型式的选择是立交建设中重要的前期工作,型式不同,将使整个立交的交通功能、投资、景观及社会和经济效益等方面均受到影响。影响高速公路立交选型的因素很多,着重阐述交通条件是影响高速公路互通式立交选型的主要因素。

体育场开合屋盖选型与设计要点

体育场开合屋盖不仅具有很强的功能性,也是影响建筑外在形象的重要元素。从国内外实例分析出发,对体育场开合屋盖主要类型和特点进行阐述,结合近期完成的东胜体育中心主体育场的开合屋盖设计施工实践,介绍建筑设计中需要注意的要点、难点,为同类型建筑设计提供参考。

综放工作面刮板链条的选型及其可靠性

本文论述选择煤矿综采放顶煤工作面刮板输送机链条的条件，以及提高链条使用寿命和可靠性的方法。根据综放工作面生产经验，刮板输送链条故障占刮板输送事故的50％以上，在分析事故原因的基础上，找出解决问题的方法。即：选择链条的因素，影响链条使用寿命因素。找到提高链条使用寿命的方法。为小康矿、大平矿综放面选择具有良好经济型、足够强度、使用寿命长的链条提供借鉴。进而提高工作面刮板输送机的性能。保证一矿一面生产的顺利进行，创造最大的经济效益。

综放工作面刮板链条的选型及其可靠性

本文论述选择煤矿综采放顶煤工作面刮板输送机链条的条件，以及提高链条使用寿命和可靠性的方法。根据综放工作面生产经验，刮板输送链条故障占刮板输送事故的50％以上，在分析事故原因的基础上，找出解决问题的方法。即：选择链条的因素，影响链条使用寿命因素。找到提高链条使用寿命的方法。为小康矿、大平矿综放面选择具有良好经济型、足够强度、使用寿命长的链条提供借鉴。进而提高工作面刮板输送机的性能。保证一矿一面生产的顺利进行，创造最大的经济效益。

高速公路互通式立交选型浅谈

立交型式的选择是立交建设中重要的前期工作,型式不同,将使整个立交的交通功能、投资、景观及社会和经济效益等方面均受到影响。影响高速公路立交选型的因素很多,本文着重阐述交通条件是影响高速公路互通式立交选型的主要因素。

Modeling of fine coal flotation separation based on particle characteristics and hydrodynamic conditions

Flotation is a complex multifaceted process that is widely used for the separation of finely ground minerals. The theory of froth flotation is complex and is not completely understood. This fact has been brought many monitoring challenges in a coal processing plant. To solve those challenges, it is important to understand the effect of different parameters on the fine particle separation, and control flotation performance for a particular system. This study is going to indicate the effect of various parameters （particle Characteristics and hydrodynamic conditions） on coal flotation responses （flotation rate constant and recovery） by different modeling techniques. A comprehensive coal flotation database was prepared for the statistical and soft computing methods. Statistical factors were used for variable selections. Results were in a good agreement with recent theoretical flotation investigations. Computational models accurately can estimate flotation rate constant and coal recovery （correlation coefficient 0.85, and 0.99, respectively）. According to the results, it can be concluded that the soft computing models can overcome the complexity of process and be used as an expert system to control, and optimize parameters of coal flotation process.

有线数字电视试验总体方案及进展情况

广电总局的科技“十五”计划已经全面启动,广播影视数字化列为当前科技工作的重点。围绕如何推进我国的数字电视发展,广电总局组织了多方面的调查、研究和讨论。

连续刚构立交桥设计体会

通过对墨山立交跨线桥的设计 ,介绍了连续刚构桥梁的选型条件、双板桥墩的受力特点以及纵向、竖向预应力钢筋设计的认识和体会。

Model-free conditional independence feature screening for ultrahigh dimensional data

Feature screening plays an important role in ultrahigh dimensional data analysis.This paper is concerned with conditional feature screening when one is interested in detecting the association between the response and ultrahigh dimensional predictors(e.g.,genetic makers)given a low-dimensional exposure variable(such as clinical variables or environmental variables).To this end,we first propose a new index to measure conditional independence,and further develop a conditional screening procedure based on the newly proposed index.We systematically study the theoretical property of the proposed procedure and establish the sure screening and ranking consistency properties under some very mild conditions.The newly proposed screening procedure enjoys some appealing properties.(a)It is model-free in that its implementation does not require a specification on the model structure;(b)it is robust to heavy-tailed distributions or outliers in both directions of response and predictors;and(c)it can deal with both feature screening and the conditional screening in a unified way.We study the finite sample performance of the proposed procedure by Monte Carlo simulations and further illustrate the proposed method through two real data examples.