溅射后退火反应法制备GaN薄膜的结构与发光性质

报道了用溅射后退火反应法在 Ga As (110 )衬底上制备 Ga N薄膜 .XRD、XPS、TEM测量结果表明该方法制备的 Ga N是沿 c轴方向生长的六角纤锌矿结构的多晶薄膜 .PL测量结果发现了位于 36 8nm处的室温光致发光峰.     

X射线光刻掩模后烘过程的瞬态热分析

X射线光刻掩模是下一代光刻技术(NGL)中的X射线光刻技术的关键技术难点。在电子束直写后的掩模后烘过程中，掩模表面的温度场分布及温升的均匀性是影响掩模关键尺寸(CD)控制的重要因素，如果控制不当，会造成掩模表面的光刻胶烘烤不均匀，使掩模吸收体CD分布变坏。针对电子束直写后X射线光刻掩模的后烘过程建立了热模型，并采用有限元技术进行了瞬态温度场的计算。计算结果表明：采用背面后烘方式，在达到稳态时出现高温区和低温区，最大温差为10.19℃，容易造成光刻胶局部烘烤过度，而采用正面后烘方式，掩模达到稳态的时间短，温度分布均匀，烘烤效果好。     

电子商务物流与邮政

论述了电子商务中物流的作用以及我国的基本现状，为邮政参与物流，抢占先机提出了一些具体措施。     

宽带接收机前端非线性的盲辨识与数字后补偿方法

提出了一种基于Volterra模型的实时非线性数字后补偿方法。考虑到接收机难以事先获知输入信号的特点,设计了"大信号频率外总功率最小"的盲辨识准则,自适应地调整模型参数以拟合出与接收机非线性失真特性互逆的传递函数。对多频与16QAM调制输入信号的实测结果表明,该方法可使工作于非线性区的高效率接收前端的无杂散失真动态范围(SFDR)提升近26dB,并大幅提高了对微弱信号的检测能力。     

高职商务英语专业顶岗实习问题的思考——以苏州农业职业技术学院旅游英语专业为例

顶岗实习作为有效推进高职高专工学结合人才培养的重要途径,能大大提高学生的实践操作能力和职业素养。由于我院商务英语专业尚未开展顶岗实习,而旅游英语专业却已经实施了顶岗实习的人才培养方式,因此,为了更好地开展商务英语专业的顶岗实习,本研究通过对已完成顶岗实习的旅游英语专业的学生进行问卷调查,并通过反思顶岗实习中存在的问题,从而为研究我院开展商务英语顶岗实习提供建议和帮助。     

“物流岗位技能训练”数字化课程建设及应用

文章结合实际教学过程,对“物流岗位技能训练”数字化课程建设的思路及应用的功能进行分析,并描述其中产生的具体技术性问题。     

Synergetic effect of chelating agent and nonionic surfactant for benzotriazoleremoval on post Cu-CMP cleaning

The cleaning of copper interconnects after chemical mechanical planarization (CMP) process is a critical step in integrated circuits (ICs) fabrication. Benzotriazole (BTA), which is used as corrosion inhibitor in the copper CMP slurry, is the primary source for the formation of organic contaminants. The presence of BTA can degrade the electrical properties and reliability of ICs which needs to be removed by using an effective cleaning solution. In this paper, an alkaline cleaning solution was proposed. The alkaline cleaning solution studied in this work consists of a chelating agent and a nonionic surfactant. The removal of BTA was characterized by contact angle measurements and potentiodynamic polarization studies. The cleaning properties of the proposed cleaning solution on a 300 mm copper patterned wafer were also quantified, total defect counts after cleaning was studied, scanning electron microscopy (SEM) review was used to identify types of BTA to confirm the ability of cleaning solution for BTA removal. All the results reveal that the chelating agent can effectively remove the BTA residual, nonionic surfactant can further improve the performance.     

Sickle bush (Dichrostachys cinerea L.) field performance and physical–chemical property assessment for energy purposes

The sickle bush (Dichrostachys cinerea (L.) Wight & Arn.) comprises a woody legume shrub which is widely distributed throughout of the tropical areas of Africa, Asia and Oceania, being found as well in Cuba where it represents a difficult to control invasive plant. It holds great silvopasture and energy crop potentials. In southwestern Spain a two year field trial was conducted contemplating also another six hardwood taxa commonly used as energy crops. The sickle bush above ground dry biomass fraction was 60.4%; sickle bush displayed a high transpiration rate during hot days (3.02 kg m⁻² d⁻¹ to 6.82 kg m⁻² d⁻¹); cold winter temperatures (<−2 °C) together with hot and dry summer air (<20% relative humidity) committed survival and growth. The physical-chemical wood properties and the pellets thereof derived were analyzed and compared to those of the other energy crop taxa. The within other woody species normal chemical composition range coupled to a high wood density and energetic use properties (19.2 MJ kg⁻¹ higher heating value, 29 g kg⁻¹ ash content) all allow for an industrial use. Pellets evidenced also good physical and mechanical properties (690 kg m⁻³ bulk density, 42 g kg⁻¹ moisture content). However, the mechanical durability (93.9%) was slightly less than that required by the non-industrial use standards, therefore further improvements should be studied. All of the above could encourage scrubland cuts in Cuba as a mechanical control method, in addition to the expansion of plantations within of their tropical climate based natural habitats.     

基于POE研究的城市公园规划设计——以橘子洲公园为例

国内传统城市公园规划设计多从景观美学以及游憩的角度作为规划与经营的方向,大都以决策者为导向的方式进行,而对于是否符合使用者的需求以及发展的原则并没有太多的着墨。本文以长沙橘子洲公园为例,从景观设计维护、人际关系、休憩设施、厕所满意度、自然生态水池满意度五个方面对公园进行POE研究,并在此基础上提出规划改造策略与建议,为创造生态活力、“以人为本”的城市公园提供依据。     

后压浆方案的技术可行性论证

从地层选择、效果预测、经济分析和施工应用４个方面对钻孔灌注桩后压浆方案进行可行性论证，并对承载力增幅进行了分析。