检索结果-南通市图书馆

水煤浆添加剂与煤之间的相互作用规律研究 Ⅰ.复合煤颗粒间的相互作用对水煤浆流变性的影响

燃料化学学报 2003年第6期31卷 519-524页

作者：朱书全邹立壮黄波崔广文王奇中国矿业大(北京)化学与环境工程学院北京100083

使用12种不同分散剂对14种不同变质程度的煤进行了成浆性实验,分析了182个水煤浆(CWS)样品的流变性。结果表明,低变质程度和高灰煤浆多呈屈服假塑性,煤的性质起主导作用;变质程度高且灰分较低煤浆的流变性,主要依赖于分散剂的结构与性质... 详细信息

使用12种不同分散剂对14种不同变质程度的煤进行了成浆性实验,分析了182个水煤浆(CWS)样品的流变性。结果表明,低变质程度和高灰煤浆多呈屈服假塑性,煤的性质起主导作用;变质程度高且灰分较低煤浆的流变性,主要依赖于分散剂的结构与性质;分子结构单元立体空间效应大,疏水基团与亲水基团呈立体间隔分布的分散剂,易形成屈服假塑性CWS;分子线度长,亲水基团与疏水基团呈线性间隔分布的分散剂,易形成胀塑性CWS。复合煤粒间的相互作用方式是决定CWS流变特性的关键。

关键词：水煤浆添加剂煤分散剂流变特性复合煤粒相互作用

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Application of MATLAB on Moiré image processing

Application of MATLAB on Moiré image processing

引用

第五届国际非线性力学会议

作者： Yan-qi Song~1,Chun-yan Gao~2 (1.Department of Mechanics,china university of mining and technology,beijing 100083,china 2.Shijiazhuang university of Economics,Shijiazhuang 050031,china)

＜正＞In this paper we discuss principles and techniques of image processing with the aid of *** show how the central lines of Moir（?） images can be extracted using image cutting,noise processing,binarizing and thin...

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Study on Low-Temperatrure Modification of Printed Circuit Board

Study on Low-Temperatrure Modification of Printed Circuit Bo...

引用

2007中国科协年会

作者： Zhou Cuihong~1 Chen Maohe~2 Qiao Xuefeng~1 1.Department of Environmental Engineering,beijing Institute of Pectrochemical technology,beijing 102617,china 2.Shcool of Chemical and Environmental Engineering,china university of mining and technology,beijing 100083,china

Introduced the components and mechanics intensity of Printed Circuit Board (PCB) at room temperature. Emphases have been placed on study the low-temperature modification of *** found that impact strength tends to decrease with cooling temperature and drops to a lowest value at-30℃.As for the bending strength,it tends generally to firstly decrease and then increase,and at-30℃ bending strength and failure strength all fall down to a minimum value and then rise up again *** production capacity and power consumption of different cooling *** results show that crush PCB at low temperature can increase production capacity and decrease power consumption in a certain *** cryogenic grinding the average power consumption is lower between -30℃ to-60℃ and the average power is decrease in evidence at-30℃,freezing time for 10 minutes is *** offers the theoretical foandation for the design of the crushing flow and choose device in the recycling of PCB.

关键词： Printed Circuit Board(PCB) low-temperature modification grinding power consumption

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Preparation and Water retention properties of clay-based sand-fixing and grass-planting materials

Preparation and Water retention properties of clay-based san...

引用

2011中国材料研讨会

作者： ZHANG Zengzhi,WANG Botao (School of Mechanical Electronic and Information Engineering,Research Institute of Ecological and Functional Materials,china university of mining and technology (beijing),beijing 100083)

Targeting the problem of available water conservation in sand fixation,the sand-fixing and grass-planting materials was prepared with clay modified by emulsifying vegetable waxes and *** water retention properties was studied in simulating desertification environmental climate and the materials were characterized by means of SEM,FTIR,XRD and TGA *** result showed that the materials has excellent water retention ability,which owning to that vegetable waxes adhering evenly to clay particle surfaces,making the clay pores changing from hydrophilic to hydrophobic and so inhibiting the water ***-planting experiment indicted that when the mass ratio of clay:vegetable waxes:OP4 being 1:6:18,the materials not only inhibits water evaporation but also maintains sound air permeability so shat the germination rate and survival rate of grass was well improved.

关键词： OP4 vegetable waxes sand-fixing and grass-planting water retention

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

ANALYSIS OF PIEZOELECTRIC ENERGY HARVESTING DEVICE WITH ADJUSTABLE RESONANCE FREQUENCY

引用

Journal of Electronics(china) 2012年第Z2期 310-318页

作者： Jiang Lei Li Yuejuan* Marvin Cheng* (School of Mechanical Electronic & Information Engineering, china university of mining & technology, beijing 100083, china) *(Department of Mechanical and Aerospace Engineering, West Virginia university, Morgantown, WV 26505, U.S.A)

This paper presents an analytic method that adjusts resonance frequency of a piezoelectric vibration energy harvester. A mathematical model that estimates resonance frequency of cantilever is also proposed. Through moving an attached mass and changing its weight on the cantilever beam, resonance frequency of adopted piezoelectric device can be adjusted to match the frequency of ambient vibration sources, which is critical in order to harvest maximum amount of energy. The theoretical results are validated by experiments that move different masses along experimental cantilever beams. The results demonstrate that resonance frequency can be adjusted by an attached mass located at different positions on the cantilever beam. Different combinations of operational conditions that harvest maximum amount of energy are also discussed in this paper.

关键词： Piezoelectric Energy harvesting Resonance frequency

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Characteristics of Flame Front Acceleration in Bend Channels under Different Conditions

Characteristics of Flame Front Acceleration in Bend Channels...

引用

2010(沈阳)国际安全科学与技术学术研讨会

作者： DONG Yong-xiang~1,XIA Chang-jing~2,DUAN Xiang-jie~1 (1.State Key Laboratory of Explosion Science and technology,beijing Institute of technology,beijing 100081,china 2.School of Mechanics & Civil Engineering,china university of mining & technology,beijing 100083,china)

＜正＞The analysis on characteristics of flame front of propane-oxygen-air mixtures propagating in channels were carried ***,the influences of the initial concentration and the bend shape of the combustible mixtures on the flame velocity were studied by *** experimental results indicated that the flame velocity propagating through the bend increases as the mass percentage of propane ranges from 5.84%to 6.24%.It increases more than 20%for experimental setup A for the given analytical *** existence of bend in channels plays an important role on the flame front acceleration of combustible *** comparing the different bend shapes,the increment rate of velocity of flame front exists distinct obviously and the experimental setup B is the most valid than others to prohibit the flame acceleration in the *** the experimental results could provide reference for safety use of flame arresters in industry.

关键词： flame front propagation characteristics combustible mixture bend shape initial concentration flame arresters

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Inverter Air-conditioning Control System Using PID Fuzzy Controller

Inverter Air-conditioning Control System Using PID Fuzzy Con...

引用

2011 Chinese Control and Decision Conference（CCDC）

作者： JIANG Jing was with North china Institute of Science and technology,beijing,china 101601,She is now with china university of mining and technology,beijing,china 100083,ZHANG Xuesong is with Electro-optical Information Security Control Laboratory,Northeast Institute of Electronics technology,Sanhe Hebei,china 065201.

In this paper,temperature fuzzy controller was designed in the inverter cold and hot *** control system for inverter air conditioner was divided indoor machine and the outdoor *** control was realized by design of hardware circuit and two-dimensional temperature controller was selected in the fuzzy control *** fuzzy controller suitable for real-time control was ***,the practicability of self-adjust PID fuzzy controller was confirmed by simulation *** was shown that self-adjust PID fuzzy controller had a better control performance than conventional fuzzy control methods.

关键词： PID fuzzy controller Frequency conversion control Single-chip microcomputer Fuzzy control

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

利用双波干涉法对油井远井地带造缝及增渗的研究

引用

石油学报 2004年第3期25卷 79-82,90页

作者：宁靖宁书年石雅镠段建斌中国矿业大学机电与信息工程学院北京100083

评述了波动采油技术中各种方法的工作频段、作用机理和各自的优缺点。对于当前缺乏有效影响油井远井地带手段的问题 ,提出了一种新的解决方法。该方法利用 2个冲击波干涉时形成的剪切力在储油介质中制造裂缝 ,以提高介质的渗透能力 ,进... 详细信息

评述了波动采油技术中各种方法的工作频段、作用机理和各自的优缺点。对于当前缺乏有效影响油井远井地带手段的问题 ,提出了一种新的解决方法。该方法利用 2个冲击波干涉时形成的剪切力在储油介质中制造裂缝 ,以提高介质的渗透能力 ,进而对远井地带的地层进行改造。同时提出了与双波干涉法相关的数学模型 ,用该模型计算了用双波干涉法制造裂缝的能力以及冲击波对混凝土固井层和射孔安全的影响 ,从而在理论上验证了这一新方法的合理性。对实施双波干涉所需要的设备进行了研究。

关键词：波动采油技术双波干涉法油井远井地带造缝能力渗透性冲击波震源数学模型

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Risk Control of Liquid Chlorine Leak in Wastewater Treatment Plant Based on QRA

Risk Control of Liquid Chlorine Leak in Wastewater Treatment...

引用

2010(沈阳)国际安全科学与技术学术研讨会

作者： ZHANG Sheng-zhu~1,WU Zong-zhi~2,KANG Rong-xue~2,SANG Hai-quan~2,GU Hai-bo~2,LIU Ning~3 (1.Faculty of Resources and Safety Engineering,china university of mining and technology(beijing),beijing 100083,china 2.china Academy of Safety Science and technology,beijing 100012,china 3.Civil and Environment Engineering School,university of Science and technology beijing 100083,china)

＜正＞The bulk storage of liquid chlorine meets the need of disinfection but also poses a considerable risk to the residents *** on the risk analysis of chlorine leak,and through the study of chlorine leak mode,leak source strength and the consequences of accidents,the model of accident consequences of chlorine leak was *** was analyzed by quantitative method and the acceptable standards of individual and social risk were *** quantitative risk calculations are performed in a wastewater treatment plant,and the individual risk contour and social risk curve are *** respect of the high-risk areas,risk control measures are proposed.

关键词： wastewater treatment plant chlorine leak quantitative risk assessment risk control

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

FLEXURAL FATIGUE PROPERTY OF PARTIALLY HIGH PERCENTAGE FIBER REINFORCED CONCRETE

FLEXURAL FATIGUE PROPERTY OF PARTIALLY HIGH PERCENTAGE FIBER...

引用

The International Symposium on Innovation & Sustainability of Structures in Civil Engineering

作者： Cheng Yi Heping Xie Shizhao Shen Rui Xu School of Mechanics & Civil Engineering china university of mining technology (beijing) beijing 100083 china College of Water Resource & Hydropower Sichuan university Chengdu 610065 china School of Civil Engineering Harbin Institute of technology Harbin 150006 china

＜正＞Partially High Percentage Fiber Reinforced Concrete （PHPFRC） is a kind of fiber concrete with high volume fraction fibers in its tension region when the concrete is in the non-axial stress field such as in flexural situations. In this paper, the flexural fatigue strengths of PHPFRC are tested. Its fatigue performance is described and compared with that of plain concrete and SFRC. It is found that PHPFRC specimens have long post-crack fatigue life, and the fatigue cracks are very fine. Besides, it is found that, the shape of ε-n/NF curves for PHPFRC differ for the various of stress level S as tough material does. In the statistical calculation of the fatigue data, the concept of equivalent fatigue life EN is used but the expression of EN is modified in the paper. With EN instead of fatigue life NF, both the stress level S and stress ratio R are considered into the fatigue equation. It is testified that, under different stress levels, the distribution of e- quivalent fatigue life EN of PHPFRC agrees with two-parameter Weibull distribution.

关键词： Partially high percentage fiber reinforced concrete (PHPFRC) fiber reinforced concrete slurry infiltrated fiber concrete (SIFCON) fatigue equivalent fatigue life two-parameter Weibull distribution.

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：