時光·騎士·人生

当今世界,何为骑士？骑士坦荡。心如浩淼,胸怀大度,雅量高致,气宇轩昂芸芸众生之中,尽显优雅贵族本色,骑士厚德。举止绅士,淡泊名利,英勇无畏,重情重义,滚滚红尘之中,坚持纯真本我,骑士睿智风度翩翩,光明磊落,睿智脱俗浮华尘世之间,坚定内心理想与执著。     

化工版机械类精品图书推荐

机械设计典型应用图例冯仁余、张丽杰主编本书列举大量的机械工程实例应用实例,以图作架,以文为结,主要讲述机械机构(平面连杆机构,凸轮机构,齿轮机构,轮系,间歇运动机构,螺旋机构,挠性机构,组合机构,创新机构等)基本原理及工程应用实例,以及典型机械零部件(螺纹连接,键、花键及销连接,铆接、焊接和胶接,蜗杆,轴承,轴,联轴器、集合器和制动器,弹簧等)结构设计应用实例,突出要点,为读者在机构开发、机械设计中     

南存辉谈德力西并购案

12月17日报道施耐德和德力西已经达成一个共识,形成了一个框架协议,双方各占50%的股份,董事长由中方人员永远担任,大家觉得都在中国,企业在温州,股权又是50:50,董事长由中方担任多好.我在跟施耐德合作的过程中,我了解到是什么情况呢?施耐德当时提出来50对50的合作,那是第三轮的谈判,第一轮在10年以前,当时他提出来收购,获得80%以上,我们没有谈成.第二轮到了5年以前,51%控股,我们后来也没谈成,这次50对50我们可以考虑谈的.50对50是什么谈法呢?     

青翘再次成为市场热点

青翘长势不好,引来商家关注,到产地购货者也多,因2012年产量一般,货源外销多,加之近几日交易量大,闻喜、垣曲县产地存货量已少,商家多报无货。不知是惜售,还是其他原因。山西省绛县近几日货源走销也快,货源不易组织,价坚,     

政绩

吉宁县是一个国家级贫困县,历届领导班子都想利用扶贫资金搞一个短平快的项目作为主导产业,一方面尽快脱贫致富,一方面给自己做些政绩出来。王书记来了,激情飞扬,毁了麦苗栽苹果,全县变成了大果园,可由于品质不佳,苹果烂在了地里。李书记来了,干劲十足,刨了果树搞大棚,全县变成了大菜园,可由于贮运问题,蔬菜倒在了河里。赵书记来了,信心百倍,推倒大棚建小区,     

“虎”口夺“食”

蜀道难,难于上青天!这是描写进入巴蜀的道路,群山环绕,重峦叠嶂,山高谷深。其间大江如带,汇川联流,既是气势磅礴,更是险阻重重,给人以回肠荡气之感。由此可见征服蜀道之人是多么的可敬。同样,在暖通行业里,有一些品牌,凭借自身的品牌拉力以及高效的营销团队,也上演着类似走蜀道的精彩画面,     

20年沉淀 风雨同舟路——访江西天马宜佳空调销售有限公司总经理吴辉明

江西,这座城市,历来被称为“物华天宝,人杰地灵”之地。沿着黝黑的铁轨,蜿蜒而行的火车在初秋的薄雾里踽踽独行,浩淼的鄱阳湖一眼望不到边际。如苏东坡所言,“白露横江,水光接天。纵一苇之所如,凌万顷之茫然”。可惜的是,王勃在当年滕王阁的挥毫,“落霞与孤鹜齐飞,秋水共长天一色”,此时不足黄昏,看不到那般的胜景。     

精致的设计 诗意的栖居——专访青岛绿城建筑设计有限公司暖通主任工程师张小峰

<正>刚出火车站,天空幽蓝,空气湿润,寻路未果,索一路人,依其指点,穿过条条巷道,眼前便是一望无际的大海了,心情一下子就豁然开朗,长途的疲累此时早已     

一种值得称羡的生活方式

正在德国的大街上经常可以看到,既有白发老者,又有高挑美女,还有身着蓝色工装的技工,腋下都夹着一本书,目光祥和,举止优雅,慢悠悠行走着,公交车上、一些乘客静静地读书,有时还能见到在等候乘客的片刻,司机也在翻阅书本。自古以来,读书好学的     

对话农机手

"三夏"时节,田野麦浪滚滚,收割机机声隆隆。小麦2010年又是丰收年,农民们看着丰收景象,满脸洋溢着喜盈盈的笑,农机手们开着联合收割机,满怀着甜蜜的快乐,机欢唱,人开心,同奏着麦收的"欢乐颂"!     

Histochemical and ultrahistochemical localization of heavy metals in calf organs

Cadmium, zinc, selenium, and copper were administered, singly or in combination, orally or subcutaneously. Experiment I included 32 calves of both sexes; six received Cd (two groups), Zn, Cd, and Zn, and Cd and Se (two groups) and one group was a control. In Experiment II (21 bulls), three were given Cd, Cd, and Cu, and Cd and Zn, respectively, and one group was a control. For light microscopy, in Experiment I the highest amounts of silver granules were present in the samples of liver, small intestine, and vesicular gland of all the exposed groups; in Experiment II the most affected organs were liver, kidney, and small intestine. For electron microscopy, in Experiment I, after administration of Cd and Zn, the highest amounts of granules were seen in the cytoplasm of hepatocytes and cells of the proximal and distal renal tubules and the lowest amounts were found in glandular cells of the pancreas. Administration of Cd and Se resulted in the presence of large numbers of granules in the nuclei and nucleoli of spermatogonies. In Experiment II, ingestion of Cd and Zn in feed led to the appearance of highest amounts of granules in the nucleoli, nuclei, and cytoplasm of cells in testes, kidneys, and pancreas. Following Cd intake, the highest accumulation of granules was observed in the nucleoli of hepatocytes and cells of the proximal and distal renal tubules. Combined Cd and Cu produced the highest number of granules in cells of the proximal and distal renal tubules and in the nucleoli and nuclei of germinal epithelium.     

第十一届全国流体传动与控制学术会议综述

由中国机械工程学会流体传动与控制分会主办,上海交通大学承办的第十一届全国流体传动与控制学术会议于2020年10月31日-11月2日在上海顺利召开。本届会议的主题是“流体传动与控制+人工智能”。会议共收录内容涉及人工智能与数字化、元件与系统、密封、摩擦与润滑等6个方向的论文133篇,邀请杨华勇、焦宗夏等知名专家作大会报告9个,取得了良好效果。围绕会议主题、征文范围及大会报告与会议论文开展综述,并对相关统计数据进行了分析讨论,以供国内学者和工程技术人员研究参考,并为流体传动与控制学科发展及今后举办会议提供借鉴。     

智能机床发展现状与技术体系框架

智能机床成为机床装备发展的趋势。在介绍国内外智能机床的研究现状的基础上,分析目前智能机床技术研究的三个问题,提出智能机床的狭义和广义定义;给出智能机床的包括人计机的协同性、整体与局部的协调性、智能的恰当性与无止性、自学习及其能力持续提高性、自治与集中的统一性、结构的开放性和可扩展性、制造和加工的绿色性、智能的贯穿性八个智能技术特征;阐述包括以人为中心的人计机动态交互功能、三个基本功能——执行智能功能、准备智能功能、维护智能功能的智能功能特征,以及功能之间的相互关系;建立八个理论与技术的智能机床技术理论框架,包括人计机一体化融合理论与技术、多源信息的感知理论与技术、智能决策理论与技术、智能执行理论与技术、智能维护理论与技术、智能机床综合能力评价理论与技术、智能机床标准化技术、智能机床支撑技术等,形成了智能机床的技术体系框架,同时指出上述内容将随着技术的进步和应用的深入不断充实和丰富。     

A simplified wet friction clutch test apparatus

A small, economic, test rig to evaluate friction materials and fluids for wet clutch applications has been designed, built and commissioned. In this paper, the construction, operation and performance of the machine are described, and results are presented, for two sets of typical tests. The system is capable of recording data, and torque test track, coefficients of friction, and oil temperature rise, are given.     

The new concepts of measurement error theory

In current measurement theory, there are various logical and philosophical troubles, and the evaluation concepts of measurement error are various and inconsistent among different schools. This paper throws away the shackle of the current measurement theories and concepts, and re-discusses basic measurement concepts. By proving a new measurement error theory that any error is a bias and follows random distribution, this paper points out the misunderstanding of traditional measurement theory, subverts the traditional error category theory, gives out a new interpretation of measurement uncertainty concept, proposes abolishing the concept system of precision, trueness, and accuracy, and thereby achieves the united measurement concept system across all the disciplines, including geodesy, geomatics, metrology, instrumentation, and so on.     

[学科发展]润滑研究进展

过去20余年,薄膜润滑、纳米润滑、极端工况摩擦与润滑、生物润滑、绿色润滑、微量润滑等取得了重要进展。最近10余年,超滑、仿生润滑、智能润滑与监测,以及摩擦学测试技术和模拟仿真技术等研究飞速发展。微观研究已经成为润滑研究的主要手段,面向风力发电机、高铁、深空探测、深海探测、大飞机、超高速飞行器、新能源汽车等领域的润滑与密封和绿色近零排放润滑研究已经成为工业界关注的焦点。超滑作为润滑领域的新型颠覆性技术,逐步显示出其在工业生产和人类日常生活中的应用优势与勃勃发展生机。生物润滑包括人类器官中的摩擦与润滑和仿生学研究,在人类健康生活方面展示出重要作用。极端环境（高温、超低温、真空、高压等）摩擦与润滑,在卫星、火箭、舰艇、核电站及其他国防设施上用途广泛。而智能润滑等新兴领域发展,也将智能化应用到润滑领域,为设备的智能运行和制造提供了新的思路。在此,对润滑领域几个重要发展方向,如超滑、薄膜润滑、纳米润滑、极端工况摩擦与润滑、智能润滑、生物仿生学、绿色摩擦与润滑,以及摩擦学测试方法等方面进行回顾,介绍了国内外同行最新研究进展,并对未来进行了展望。     

Assessment of PM-EDM cycle factors influence on machining responses and surface properties of biomaterials: A comprehensive review

Powder mixed-electro discharge machining (PM-EDM) is recently evolving machining technique which can simultaneously remove and modify the machined surface through thermo-electrical process. It is a modified form of EDM in which the conductive powder elements are added in the dielectric liquid to enhance machined surface characteristics and machining responses. The commonly used biomaterials such as 316L stainless steel, Ti-based alloy, Ni–Ti, Mg alloy, and Co–Mo–Cr alloy have excellent mechanical characteristics while the biofunction of these materials are not in satisfactory level. Due to higher hardness, brittleness, and heat resistant natures of the biomaterials, it is very challenging to machine them with conventional machining. Both the system efficiency and modified surface properties depend on the associated electrical and non-electrical factors of PM-EDM cycle. This review focuses on the influence of process factors such as current, pulse duration, tool-polarity, duty cycle, potential voltage, types of liquid, and added powder concentration on performance outputs including material removal and tool wear rate, coating thickness, coarseness, microhardness, coating adhesion bonding, biocompatibility, and resistant to corrosion. This study also discusses influence of various powders on machining and modified surface characteristics of biomaterials. The future research scopes and challenges of PM-EDM process are included in this study thoroughly.     

一种多功能耕整机的研发

介绍了一种多功能耕整机的研发,该机结构新颖,水旱通用,主要功能有培土、旋耕等,操作轻便,田间机动性好,能爬坡、走田埂和过沟,适宜山区、丘陵、旱地、水田、果园、菜园等场合的农耕作业,且能一机多用,经济耐用,效率高.     

共融机器人重大研究计划研究进展

“共融机器人基础理论与关键技术研究”重大研究计划,聚焦“刚-柔-软机构的行为顺应与可控性”、“人-机-环境多模态感知与自然交互”以及“机器人群体智能与操作系统架构”三个科学问题,主要面向智能制造、医疗康复、国防安全和学科前沿四个重点方向,实施四年来取得了长足进展,构建机器人与人、机器人与环境、机器人与机器人交互的共融机器人研究体系,推动了工业机器人、服务机器人和特种机器人领域的理论和技术发展,相关科研成果为我国高端制造、康复医疗、国防安全等国家重大需求提供了坚实的理论和技术支撑。对在该重大研究计划支持下所取得的有关共融机器人的主要研究进展进行概述,内容涵盖“与环境共融的加工制造机器人”、“与人共融的康复辅助机器人”、“机器人间共融的群体智能与操作系统”以及“共融机器人前沿：新方法、新原理和新概念”,以此给出后续的重点研究方向和建议。     

城市生活污水中阿片类、苯丙胺类以及苯二氮卓类滥用物质的高分辨质谱筛选及确证

本研究采用固相萃取对城市生活污水样品进行前处理,超高效液相色谱-串联高分辨质谱法筛选及确证污水中阿片类、苯丙胺类和苯二氮卓类等36种滥用物质,并将其应用于实际污水样品。结果表明,该方法的专属性强,36种滥用物质的检出限范围为5~20 ng/L。在12个污水样品中共检出吗啡、可待因、哌替啶、曲马多4种阿片类滥用物质,甲基苯丙胺1种苯丙胺类滥用物质以及地西泮、去甲西泮、艾司唑仑、阿普唑仑4种苯二氮卓类滥用物质。城市生活污水中存在多种滥用物质,区域流行性不同,利用本方法可进行快速、准确地筛选与确认。