小型中央空调机组的发展前景

小型中央空调同组以其性能可能，价格达中，安装方便，使用灵活，占用空间小，操作简单，维护费用低等特点，较好的满足了市场的需求，受到了用户的青睐，在住宅，别墅，餐厅，商场，写字间等外采用愈来愈多。本文分析了家用空调器的缺点，解释了小型中央空调机组的由来，说明了小型中央空调机组的特点和分类，阐述了小型中央空调机组的发展前景，为小型中央空调机组的广泛使用奠定了基础。     

湖北建设机械股份有限公司“八五”技术改造工程设计

该企业“八五”技改肾以开发新产品，提高产品制造水平，提高产品产量和质量，提高经济效益为目的，调整了生产布局，理顺了工艺流程，新建了铸钢等厂房，引起了先进的工艺装备，淘汰和改造了部分老设备，组成了产品装配线，建立了油漆生产线，增强了产品测试手段，组建了计算机工作站，技改后，产品品种、产量及经济效益都有了较大幅度的增长。     

工业工程在发动机装配车间的应用

运用ＩＥ知识对发动机装配车间空间物流路线进行研究与调整，并对发动机总装线进行了工作研究和时间平衡，减少了人员，降低了成本，缩短了周期，提高了效率，给企业带来了直接的经济效益。     

离聚体的聚集态结构特性及性质

介绍了离聚体的定义，发展过程，合成方法和目前的应用情况，研究了离聚体的聚集态结构，总结了目前离聚体的主要聚集态模型，研究了影响聚集态结构的主要因素，介绍了离聚体所特有的力学性质，介电谱和溶液性质，指出了目前尚待研究的问题。     

真空微电子管的研究

综合了已有的真空微电子器件理论的研究成果，提出了真空微电子三极管优化模型，并且进行了初步计算，得到了真空微电子三极管优化模型的理论特性，同时，利用独创的无版光刻工艺制作了真空微电子三极管，进行了测试，并且与结果进行了比较。     

预制浮置板钢模设计与制作

预制浮置板钢模设计方案，将面板与承轨台部分分开加工，然后组装的方案，不光节约了50％的机械加工时间，而且提高了材料利用率，连组装时间也节约了30％，提高了工作效率，节约了成本。     

管道结构振动有限元法分析及减振研究

 对管道振动机理进行了分析，运用弹性力学理论，建立了管道系统结构振动数学模型，并采用有限元方法，通过计算机仿真，分析了管道系统的结构振动，得出了管道系统结构振动固有频率和振型分布，掌握了结构参数对结构振动的影响规律，并进行了实验验证．     

高层建筑地基基础沉降协调分析

结合实际工程，笔者对某高层建筑进行了沉降计算与分析，介绍了桩位的布置情况，同时，对现场进行了现场观测，实践证明，该工程取得了良好的经济效益。     

薄板坯纵裂影响因素分析

对薄板坯纵裂进行了分析统计，从保护渣影响，钢水温度影响，拉速影响，液位波动，一冷水情况，中包车高度方面找出了板坯纵裂的影响的主要因素，制定了相应的措施，取得了较好的效果。     

采用地源热泵提供良好的冷热源系统

本文通过具体的工程事例，详细阐述了对浅表地下水这种可再生能源，运用热泵技术，将其低位热能，提升为高位热能，通过能量品位佣值的变化，使中央空调，实现了冬供热，夏供冷，取代了原溴化锂燃油冷热水机组制冷一供热系统，不仅实现了节能、环保，而且运行费用较低，成为“绿色工程“。     

Encapsulation of cellulose chain into carbon nanotubes and boron nitride nanotubes

Encapsulation of cellulose chain into carbon nanotubes and boron nitride nanotubes was investigated to find out the possibility of band gap engineering in these nanotubes. The structural stability and the electronic properties of the zigzag carbon nanotubes and boron nitride nanotubes filled with cellulose chain were studied using density functional theory. It was found that encapsulation of cellulose chain into nanotubes was an exothermic process. The metallic properties of the carbon nanotubes did not change by cellulose encapsulation. The semiconductor and insulator nanotubes filled with cellulose were shown semiconducting properties. The energy band gap of these tubes was decreased by cellulose encapsulation. The results demonstrated the ability of band gap engineering through the encapsulation of cellulose chain into carbon nanotubes and boron nitride nanotubes.     

碳源对碳纳米管形态的影响

以苯和甲苯为碳源,二茂铁为催化剂,含硫化合物为助催化剂,采用浮游催化裂解法制备了碳纳米管,并采用TEM对不同条件下所得碳纳米管进行了形态分析。结果发现,碳源中苯和甲苯的配比对碳纳米管的形态有着重要的影响。以纯苯为碳源时,产物主要为直线型碳纳米管,并存在极少量短的弯曲型碳纳米管。随着碳源中甲苯比例的增加,产物中折线型碳纳米管增加。以纯甲苯为碳源,产物中仍有少量直线型碳纳米管,而不完全是折线型碳纳米管;此外,产物中还发现了极少量分支型碳纳米管。根据所得结果讨论分析了甲苯的加入对碳纳米管形态的影响以及各种碳纳米管的形成机理,认为可能是由于甲苯在催化热解过程中产生的碳种不同于苯催化热解所产生的碳种,造成碳在催化剂颗粒各处浓度不同,从而在碳纳米管的不同部位引入五元环和七元环而形成各种形态的碳纳米管。     

碳纳米管和镓掺杂碳纳米管场发射性能研究

采用催化热解方法分别 制备出碳纳米管和镓掺杂碳纳米管, 并利用丝网印刷工艺将其制备成纳米管薄膜. 对此薄膜进行低场致电子发射测试表明, 碳纳米管和镓掺杂纳米管开启电场分别为2.22和1.0V/μm, 当外加电场为2.4V/μm, 碳纳米管发射电流密度为400μA/cm², 镓掺杂纳米管发射电流密度为4000μA/cm². 可见镓掺杂碳纳米管的场发射性能优于同样条件下未掺杂时的碳纳米管. 对镓掺杂纳米管场发射机理进行了探讨.     

Atomistic study of structures and elastic properties of single crystalline ZnO nanotubes

The structural stability and Young's modulus of single crystalline ZnO nanotubes are investigated using atomistic simulations. Unlike the case for conventional layered nanotubes, the energetic stability of single crystalline ZnO nanotubes is related to the wall thickness. The potential energy of ZnO nanotubes with fixed outer and inner diameters decreases with increasing wall thickness, while the nanotubes with the same wall thickness are independent of the outer and inner diameters. The transformation of single crystalline ZnO nanotubes with a double layer from wurtzite phase to graphitic phase suggests the possibility of wall-typed ZnO nanotubes. The size-dependent Young's modulus of ZnO nanotubes is also investigated. The wall thickness plays a significant role in the Young's modulus of single crystalline ZnO nanotubes, whereas the variation of outer and inner diameters slightly affects the Young's modulus of nanotubes with same wall thickness.     

Single-walled MoTe(2) nanotubes

The structural, electronic, and mechanical properties of single-walled MoTe(2) nanotubes are investigated using density functional theory. All large-diameter MoTe(2) nanotubes are found to be narrow-gap semiconductors, whereas small-diameter nanotubes are found to be less stable compared to large-diameter nanotubes. Notably, the armchair MoTe(2) nanotubes exhibit an indirect band gap, whereas the zigzag nanotubes exhibit a direct band gap. The band gap decreases with decreasing diameter of the tube or if the tube is under compression or elongation in the axial direction. Young's modulus of MoTe(2) nanotubes is calculated and is found to be dependent on the diameter and chirality of the tubes. The armchair nanotubes are stiffer than the zigzag nanotubes with the same diameter. Compared to the homologous MoTe(2) nanotubes, the MoTe(2) nanotubes are softer due to less strain-energy cost in forming the nanotube structures.     

拉应力下碳纳米管增强高分子基复合材料的应力分布EI北大核心CSCD

采用基于剪切滞后模型的数值计算和有限元仿真结合的研究方法,通过构建由碳纳米管增强的高分子复合材料的圆柱形代表性体积元模型,分析在一定拉伸应力下不同碳纳米管的层数、长径比、含量以及环氧树脂、尼龙和聚甲基丙烯酸甲酯3种基体材料对碳纳米管内各层应力分布的影响。结果表明:在一定的拉伸应力下,层数和长径比对碳纳米管中各层的应力分布影响很大。碳纳米管的饱和应力值随着层数增加而减小,其值与层数存在一定的相关性,在对碳纳米管本身性能的利用率上,单壁碳纳米管表现最好;长径比的增大能有效提升碳纳米管的有效长度;随着碳纳米管含量的减少,其饱和应力值明显增大,有效长度不断减小;不同的高分子基体材料对碳纳米管的应力分布影响并不明显。     

Biomolecular applications of carbon nanotubes

Carbon nanotubes are a significant addition to the emerging field of nanotube biotechnology. The biocompatibility, high structural integrity, and unique electronic and mechanical properties of carbon nanotubes complement or surpass those of self-assembled lipid nanotubes, peptide nanotubes, and template-synthesised nanotubes (metals, polymers, semiconductors, and carbons). Carbon nanotubes are candidates for a range of biomolecular applications that is likely to widen considerably in the future.     

磷对CVD法制备碳纳米管纯度及形貌的影响

研究了磷元素对CVD法制备碳纳米管的影响．实验发现，适量地添加磷元素可以起到改善纳米铁颗粒催化作用的效果，提高碳纳米管的纯度．TEM检测发现，磷元素的添加对碳纳米管的形貌有很大的影响，含磷纳米铁颗粒可以催生出链节状碳纳米管、铁纳米线填充的碳纳米管和竹节状碳纳米管，并提高了管壁石墨晶化程度．     

硼碳氮纳米管制备方法的研究进展

三元化合物硼碳氮纳米管作为碳纳米管和氮化硼纳米管的衍生物,其禁带宽度主要取决于纳米管的成分,与手性和直径无关,且在0~5.5 eV范围内可调;另外,硼碳氮纳米管具有优良的电学性能、高硬度、高耐磨性及高温抗氧化等性质,使其在电子、光电子和纳米器件等领域具有广阔的应用前景。综述了硼碳氮纳米管制备方法的研究现状,并介绍了材料的生长机理、结构、性质和应用前景,简述了工艺条件对纳米管形成的影响,并对今后硼碳氮纳米管的研究方向提出了设想与展望。     

Conducting‐Polymer Nanotubes Improve Electrical Properties,Mechanical Adhesion,Neural Attachment,and Neurite Outgrowth of Neural Electrodes

An in vitro comparison of conducting‐polymer nanotubes of poly(3,4‐ethylenedioxythiophene) (PEDOT) and poly(pyrrole) (PPy) and to their film counterparts is reported. Impedance, charge‐capacity density (CCD), tendency towards delamination, and neurite outgrowth are compared. For the same deposition charge density, PPy films and nanotubes grow relatively faster vertically, while PEDOT films and nanotubes grow more laterally. For the same deposition charge density (1.44 C cm^?2), PPy nanotubes and PEDOT nanotubes have lower impedance (19.5 ± 2.1 kΩ for PPy nanotubes and 2.5 ± 1.4 kΩ for PEDOT nanotubes at 1 kHz) and higher CCD (184 ± 5.3 mC cm^?2 for PPy nanotubes and 392 ± 6.2 mC cm^?2 for PEDOT nanotubes) compared to their film counterparts. However, PEDOT nanotubes decrease the impedance of neural‐electrode sites by about two orders of magnitude (bare iridium 468.8 ± 13.3 kΩ at 1 kHz) and increase capacity of charge density by about three orders of magnitude (bare iridium 0.1 ± 0.5 mC cm^?2). During cyclic voltammetry measurements, both PPy and PEDOT nanotubes remain adherent on the surface of the silicon dioxide while PPy and PEDOT films delaminate. In experiments of primary neurons with conducting‐polymer nanotubes, cultured dorsal root ganglion explants remain more intact and exhibit longer neurites (1400 ± 95 µm for PPy nanotubes and 2100 ± 150 µm for PEDOT nanotubes) than their film counterparts. These findings suggest that conducting‐polymer nanotubes may improve the long‐term function of neural microelectrodes.