经济的发展不断地促进我国城市化建设朝着越来越高的水平靠近.人们对于生活条件提高的要求也不断地在环境质量及居住的舒适度上有所体现,对于建筑设施的总体质量的问题也给予了充分的关注.而建筑行业中对于给排水的设计和问题处理及采用的解决措施同样关系到建筑行业的基础设施质量提高是否有效,关系到建筑行业的发展是否长久.

我国多数地方的村寨生活污水一般采用化粪池(厌氧法)简单处理后直接排放,污水中的BOD5一般仅降低20％左右,大量悬浮物随污水一起排出,给自然水体及地下水造成严重污染.文章以贵州省铜仁市某村寨的生活污水为处理对象,采用浅度发酵与人工湿地组合法处理.实践表明:浅度发酵-人工湿地组合工艺能有效处理村寨生活污水,经该工艺处理后,出水水质主要指标能够达到《城镇污水处理厂污染物排放标准》(GB18918-2002)一级A标要求.整个处理过程工艺简单,运行成本低(仅为常用的A2/O法的1/3),可以满足村寨生活污水达标排放的要求.

Na2S-Al2 (SO4)3-PAM system is adopted to deal electroplating wastewater containing cadmium by ammonia complexing agent directly.The effects of initial pH value of wastewater,the dosage of Na2S,the dosage of Al2 (SO4)3 · 18H2O and reaction time on the treatment efficiency were studied.Experimental results show that at pH =7,when the dosage of Na2S is 5 mL/L,after stirring reaction 20 min at room temperature,8 mL/L Al2 (SO4)3 · 18H2O and 3 mL/L PAM were added,continue stirring reaction 5 min,and then put it aside for 15 min.The mass concentration of residual Cd2+ in the supernatant was 0.03 mg/L,which reaches the requirement of no more than 0.05 mg/L in GB 21900-2008,and the removal rate of Cd2+ reached 99.9 ％.

为适应我国经济社会发展对应用技术型专业人才的大量需求,应用型本科的建设正在各地特别是各地方高校展开.在这一背景下,作为肩负着培养工业化及制造业一线应用技术型高级人才的本科机械工程类专业,如何创新培养模式去适应应用型本科建设的需要,是能否培养出合格机械工程应用技术型高级专业人才的关键,而这种应用型培养模式的效果很大程度体现在实践教学环节.因此,以实践教学改革为突破口,研究实践教学具可操作性的培养方案,去创新和改革机械工程专业的培养模式,找出理论教学与实践教学的融合点,从而真正改变理论教学与实践教学脱节的现状,使机械工程专业在向应用型本科转型中建立起正确的培养体系.

With Hall element A1323LUA as the magnetic signal converter, and AD637 as the true RMS integrated converter, a Hall sensor measuring circuit and signal processing circuit was firstly constructed;Then, in combination with other function modules, and by adopting true RMS instead of average algorithm, a measurement device was produced in the lab to measure magnetic fields with different current waveform.The calibration and measurement verification of magnetic induction intensity meter shows that it can meet the test need of the non-sinusoidal wave medium frequency high magnetic field.

机械CAD课程是一门应用性极强的技能性课程。在该课程的整个教学过程中，要把学生置于设计者的角色，让学生明白其学习过程是工程师应用设计工具来设计表达完成正确的作品的过程，设计绘制的作品应该是工艺工程师可以用它在车间加工制作出实物产品的正确图样。“作品化”的教学过程融合了多门专业基础课程，“作品化”教学的特点是以三维模型辅助二维图形的空间思考，以实物模型作为图样作品的实物验证，是一套完整的课程教学体系。

For solving the continuous and integer variable optimization problems in gear transmission, this article to establish a gear transmission optimization mathematical model, study the influence of modulus, tooth width, helix angle and tooth number on objective function by genetic algorithm, and the digit results is well.

Small-sized,light weighted and modularized farm machinery is the way out of lower mechanization level for mountain regions,while modular design is an effective way to realizing multi-functional farm machinery.The different explanation to multi function will result in different design way and market foreground.In the paper,a module classification method based on product family sharing module and variable module is suggested,and different farm machinery can be assembled by converting different variable modules and therefore the object of a machine with multi-function can be realized.In addition,machinery of same function with different properties can be combined by changing different alternative modules,in this way the selective space of different consuming levels is provided.

In the paper,research on the solution to inverse eigenvalue problem are carried out,it can be concluded as a structure optimization problem with respect to frequency constraints,which can be solved by genetic algorithm(GA) with artificial neural network(ANN) as the analyzer.Digital examples demonstrate the effectiveness of the method.

Analyses the principal of titanium & titanium alloys oxidizing and the relation of thickness and color of the oxidizing film and the oxidizing power, The reasons are pointed out, which the low reapparition-rate and the difficult control of color of oxidizing film lie in titanium & titanium alloys anodizing with common power. The technique and equipment parameters are acquired by anodizing experiments, which ensure the identity of oxidizing film color of titanium & titanium alloys oxidizing for batch-type production, where the voltage is severed as a control object, the adjustable stable voltage and the controlling pattern of self-shutting are used, that enable the terminal voltage and the pattern of voltage inputting to be accurately controlled, and ensure the identity of oxidizing film color for batch-type production. These are utilitarian measures in the application of titanium & titanium alloys oxidizing for batch-type production.

在CDIO这一先进的工程教育培养模式下,通过对《建筑CAD》这门建筑各专业必修的专业技术技能基础课程几年的教学改革探索与研究,形成了以工程设计规律为主线、突出实用以培养工程应用能力为目标的较为完整的创新教学模式.在实际教学中应用,取得了优良的教学效果.

Through analysis of structures characteristics of several kinds of household digester in Guizhou province,design improving methods were put forward.It has practical and reference value under background of wide development of rural biogas engineering in our country.

This paper changes the traditional teaching thinking mode that is from the to the in the teaching of engineering drawing course,which achieves good teaching effects by applying the CAD dimensional design thinking of plane in advance than stereo to teaching of the whole engineering drawing course.

The motion synthesis of mechanism consists of reappearing given movement and trajectory.In the paper,inference the position,velocity and acceleration of the driven bar of quadric crank chain when the driving bar are derived,and a computer program based on MATLAB is compiled to simulate the linkage curve,position,velocity and acceleration.

We need plotting the design drawing to paper according to different requirement when we make engineering drawing design.It should be a good and practical method that paper space plotting in CAD.

本文主要介绍并联机床的结构特点和设计理论,并对关键技术和发展趋势作了分析.

In this paper, according to the characteristic and need of AutoCAD plot, conclude the methods of AutoCAD plot accurately form in several modes and analysis the way of setting for the modes, it be of great practical.

It is the good method that using steel mold to build methane generating pit quickly and standardized.In this paper, Described the design essentials for steel mold be used to build methane generating pit of cylinder and smaller and high efficiency that be used universally in practice, Including important design principle and scheme of structure and parameter of design.