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中联重科越野轮胎起重机实现国内批量销售中联重科与中国石油天然气集团日前在北京签署6台55t越野轮胎起重机采购协议。这是国产越野轮胎起重机首次在国内实现批量销售,也是中联重科继2010年3月拿下25台越野轮胎起重机出口美国的订单后,在越野轮胎起重机市     

中国发展环轨式起重机的必要性论述

目前,国内外大吨位起重机主要分为履带式起重机、液压提升/顶升系统以及环轨式起重机三种类型。本文通过对这三类起重机在国内外发展状况及各自特点进行对比研究,强调环轨式起重机的巨大优越性,论述环轨式起重机在中国吊装行业发展的必要性及其重大意义,同时对中国企业发展环轨式起重机的性能要求及模型构造提出设想。     

浙江省内双小车起重机的统计与分析

起重机是冶金、化工等工业用重要基础设备,本文调查统计浙江省内双小车起重机的使用情况,并分析了双小车起重机在各领域的应用以及不同形式双小车起重机的百分比。     

汽车起重机结构件面漆涂装工艺的研究

汽车起重机结构件面漆涂装质量直接影响起重机外观,在起重机的涂装工艺中有重要地位。针对3种喷涂类型（高压无气喷涂,混气喷涂和静电喷涂）,通过优化喷嘴口径、喷涂压力、喷涂距离、喷枪移动速度等参数,确保汽车起重机结构件面漆的漆膜厚度和涂装节拍,提高涂料利用率,满足汽车起重机的漆膜外观和涂装效率要求。     

中联重科越野轮胎起重机实现国内批量销售

中联重科与中国石油天然气集团日前在北京签署6台55t越野轮胎起重机采购协议。这是国产越野轮胎起重机首次在国内实现批量销售，也是中联重科继2010年3月拿下25台越野轮胎起重机出口美国的订单后，在越野轮胎起重机市场拓展中取得的又一次重大突破。     

国外履带起重机新技术新特点及国内生产研发现状

阐述了国内履带起重机市场现状,国外履带起重机新技术新特点,国内履带起重机生产研发现状,并提出提高产品质量的有效途径与根本条件。     

2001年我国汽车起重机销售情况

汽车起重机行业是载重轮胎重要市场之一，轮胎制造企业是汽车起重机制造企业供应链的重要组成部分。因此，汽车起重机市场的变化对轮胎业的发展有直接影响。随着我国加入WTO，国内工程起重机行业受到越来越大的挑战，优势企业日益凸显强势，落后和劣势企业被淘汰出局不可避免。２００１年已经有汽车起重机企业被迫转产或停产，甚至于破产，亦波及到轮胎企业应收账款和呆死账款的增长。为了有助于轮胎企业进一步了解汽车起重机生产企业运行状况，提高对汽车起重机市场的驾驭能力，主动地去面对未来市场，有选择的进入汽车起重机供应链，规…     

汽车起重机防腐涂层设计及涂装

汽车起重机的工作环境一般比较恶劣,容易出现局部生锈现象。为了提高汽车起重机的整体防腐性能,本文针对现有的汽车起重机涂装,讨论了防腐涂层设计中一些注意点和涂装过程中需要控制的关键因素,以确保汽车起重机在使用过程中的防腐寿命。     

强强联合 打造工程起重机维修维护信誉品牌——中石化第十建设有限公司工程机械修理分公司上海维得维修中心揭牌

正吊装无小事。起重机自身的价值就已不菲,被吊装物件的价值往往还要超过起重机自身,而吊装工程外延出的工程安全价值更非金钱可以衡量。因此,时刻保证起重机处于安全、高效状态,对于工程界至关重要。据统计,目前国内各式履带式起重机超过1万2千台,轮式起重机更是达到了24万余台。这些起重机大多购置于几年前的工程建设爆发期,已经逐步进入到了维护保养阶段。面对数量如此庞大的工程起重机,其维护保养工作已经超出了任何整机厂家的能力范围。又由于起重机品牌多样,加之吊装工程环境     

无线电台在桥式起重机远程监控系统中的应用

无线电台在桥式起重机上的应用实现了中控室对车间桥式起重机的自动监控,远程实时检测两台桥式起重机的运行状态。主要介绍了该系统的主要功能、结构等。     

依达拉奉联合用法舒地尔治疗88例缺血性脑卒中疗效观察

目的观察依达拉奉联合法舒地尔治疗缺血性脑卒中的临床疗效。方法对治疗组88例患者,对照组40例患者均给予脑梗死常规治疗,治疗组在此基础上加用依达拉奉联合盐酸法舒地尔,观察记录2组患者治疗前后症状、体征,神经功能缺损程度评分等各项指标。结果本研究中,2组患者接受治疗后均有明显疗效,但治疗组在神经功能缺损程度评分、有效患者例数和总有效率上均明显优于对照组(P<0.05)。结论依达拉奉联合法舒地尔治疗缺血性脑卒中可清除自由基,使脑梗死区域缺血半暗带的神经细胞功能得以恢复,减轻神经功能的损伤,有效的治疗缺血性脑卒中,效果明显,且无明显不良反应,适合在脑梗死临床治疗上推广。     

Predicting the handlability of a coal blend from measurements on the source coals

Coals may be blended at mines to meet contractual criteria set by the client. In formulating a blend, the criterion that is hardest to meet is often the handlability because it is difficult to predict. Most research on coal handling treats coal handlability as a property to be measured for a given material, and there appear to have been very few attempts to predict the consequences of blending choices, or to use such information to optimise coal blends for the different contractual requirements. This paper presents what is believed to be the first study to explore the causal relationships in coal blending, to use these to predict the handlability of a blend, and to establish the basis needed to optimise blending choices. The ultimate goal of this work is an algorithm that can be used in on-line real time choices in coal blending operations, either at mines or at power stations.     

以废热锅炉检修工程浅谈工程施工管理

作为工程的现场管理者,项目施工前应该首先了解工程中要做什么事,由谁去完成它,什么时间去完成它及如何组织去完成它？概括起来为＂做什么,怎么做＂,即＂DO WHAT,AND HOW？＂,然后根据自身条件去选择最优的方法,合适的人力,购买合格的材料,使用实用的机器,制造安全良好的施工环境,然后树立施工人员的责任心,掌握各道工序及控制点,施工时协调各方问题即可安全、保质、保量,如期完成工程。     

The Natural History of T Cell Metabolism

The cells of the immune system, particularly the T lymphocytes, have two main features that distinguish them from the cells of other tissues. They proliferate after activation and have the ability to move in tissues and organs. These characteristics compel them to develop metabolic plasticity in order to fulfil their immune function. This review focuses on the different known mechanisms that allow T cells to adapt their metabolism to the real-life circumstances they operate in, whether it is to exit quiescence, to differentiate into effector cells, or to participate in immune memory formation. Some of the metabolic adaptations to environmental variations that T cells are likely to undergo in their immune monitoring function are also discussed.     

物理化学在水泥基材料中的应用(英文)

热力学和动力学可用于水泥基材料尤其是水泥浆体设计中。热力学的应用便于选择水泥浆体需要的化学组分,使得该材料具有宏观孔隙的特殊相组合,而动力学的应用,一方面可以提高早期水泥水化过程中的水化率,另一方面可以调节该材料的宏观孔隙的分布。对于含有水化硅酸钙的水泥浆体,控制晶核形成和生长的速率有助于改变细观孔隙的分布。因此,应用热力学和动力学研究水泥基材料的物理化学特性,可以大大改善这些材料的微观结构和最终的物理力学性质。     

环戊二烯选择加氢制环戊烯

用Pd催化剂在固定床反应器中进行了环戊二烯选择加氢制备环戊烯研究;确定了第一段加氢催化剂采用Pd含量为0．5（wt）％载体为γ-Al2O3催化剂,第二段加氢催化剂为钯含量为0．3（wt）％载体为γ-Al2O3催化剂。第一段氢烃摩尔比为2—3,反应压力为1．2MPa,空速2～4h～,温度55—60℃,第二段氢烃摩尔比为3．5～4,温度80～85℃时,环戊二烯的转化率达99．5％,环戊烯的选择性在90％以上。     

Long-term residual value of North Carolina and Queensland rock phosphates compared with triple superphosphate

The effectiveness of large single applications of North Carolina reactive rock phosphate, Queensland non-reactive rock phosphate, and Calciphos, were compared to the effectiveness of superphosphate in field experiments in south-western Australia for up to 11 years after application. As measured using plant yield, superphosphate was the most effective fertilizer in the year of application, and relative to freshly-applied superphosphate, the effectiveness of the superphosphate residues declined to be about 15 to 65% as effective in the year after application, and 5 to 20% as effective 9 to 10 years after application. Relative to freshly-applied superphosphate, all the rock phosphates were 10 to 30% as effective in the year of application, and the residues remained 2 to 20% as effective in the 10 years after application. The bicarbonate soil test reagent predicted a more gradual decrease in effectiveness of superphosphate of up to 70% 10 years after application. For rock phosphate, the reagent predicted effectiveness to be always lower than for superphosphate, being initially 2 to 11% as effective in the year after application, and from 10% to equally as effective 10 years later. Therefore rock phosphates are unlikely to be economic alternatives to superphosphate in the short or long term on most lateritic soils in south-western Australia.     

Learned Recognition of Predation Risk by Enallagma Damselfly Larvae (Odonata, Zygoptera) on the Basis of Chemical Cues

We studied two populations of damselfly larvae (Enallagma boreale): one population cooccurred with a predatory fish (northern pike, Esox lucius); the other did not. Damselflies that cooccurred with pike adopted antipredator behavior (reduced activity) in response to chemical stimuli from injured conspecifics, and to chemical stimuli from pike, relative to a distilled water control. Damselflies from an area where pike do not occur responded only to chemical stimuli from injured conspecifics. In a second set of experiments, we conditioned pike-naive damselflies to recognize and respond to chemical stimuli from pike with antipredator behavior. Damselfly larvae that were previously unresponsive to pike stimuli learned to recognize pike stimuli after a single exposure to stimuli from pike and injured damselflies or pike and injured fathead minnows (Pimephales promelas). The response to injured fathead minnows was not a general response to injured fish because damselfly larvae did not respond to chemical stimuli from injured swordtails (Xiphophorus helleri), an allopatric fish. Taken together, these data suggest a flexible learning program that allows damselfly larvae to rapidly acquire the ability to recognize local predation risk based on chemical stimuli from predators, conspecifics, and heterospecific members of their prey guild.     

我国炼油企业节水减排的技术与措施

分析了炼油企业节水减排的有效途径与措施。一是充分利用循环水和蒸汽凝结水,节约新鲜水;二是提高循环冷却水浓缩倍数,实现节水运行;三是重视污水处理与回用,减少污水排放;四是优化用水系统,提高用水效率;五是推行清洁工艺,从源头节水减排;六是依靠科学管理,落实节水工作。     

浅谈江西松香工业及其发展对策

对江西松香工业进行分析,提出江西松香工业的发展对策:调整产业结构,合理利用现有松林资源,推进松香工业发展,形成规模经济,带动江西林产工业经济的发展。