一种岩溶地质条件下的城市地铁超前预报方法

 与普通公路或铁路隧道相比,城市地铁一般从城市道路下方通过,因此,城市地铁超前预报(主要指物探类预报)的实施可分洞内和洞外两部分。但由于地铁埋深较浅,干扰因素众多,需要开展综合超前预报。通过分析岩溶地质条件下的城市地铁超前预报特点,利用地质雷达和高密度电法各自优势和互补特点,提出洞内开展地质雷达超前预报和洞外开展高密度电法与地质雷达相结合的综合预报方法。辅以工程应用实例,详细分析该综合预报方法的实施与综合解释过程,证明该综合预报方法对岩溶地质条件下的城市地铁超前预报的有效性。     

Correlation of Ⅲ/Ⅴ semiconductor etch results with physical parameters of high-density reactive plasmas excited by electron cyclotron resonance

Reactive ion etching is the interaction of reactive plasmas with surfaces. To obtain a detailed understanding of this process, significant properties of reactive composite low-pressure plasmas driven by electron cyclotron resonance(ECR) were investigated and compared with the radial uniformity of the etch rate. The determination of the electronic properties of chlorine-and hydrogen-containing plasmas enabled the understanding of the pressure-dependent behavior of the plasma density and provided better insights into the electronic parameters of reactive etch gases. From the electrical evaluation of I(V) characteristics obtained using a Langmuir probe,plasmas of different compositions were investigated. The standard method of Druyvesteyn to derive the electron energy distribution functions by the second derivative of the I(V)characteristics was replaced by a mathematical model which has been evolved to be more robust against noise, mainly, because the first derivative of the I(V) characteristics is used. Special attention was given to the power of the energy dependence in the exponent. In particular, for plasmas that are generated by ECR with EM modes, the existence of Maxwellian distribution functions is not to be taken as a self-evident fact, but the bi-Maxwellian distribution was proven for Ar-and Kr-stabilized plasmas. In addition to the electron temperature, the global uniform discharge model has been shown to be useful for calculating the neutral gas temperature. To what extent the invasive method of using a Langmuir probe could be replaced with the noninvasive optical method of emission spectroscopy, particularly actinometry, was investigated,and the resulting data exhibited the same relative behavior as the Langmuir data. The correlation with etchrate data reveals the large chemical part of the removal process—most striking when the data is compared with etching in pure argon. Although the relative amount of the radial variation of plasma density and etch rate is approximately ?5%, the etch rate shows a slightly concave shape in contrast to the plasma density.     

高密度组装电气互联新技术原理与研究方法

网络通信技术的高速发展围绕着小、轻、高速和高密度几个方向给IT市场提出了多样化的需求。介绍了高密度组装发展的现状和未来的发展趋势。CSP的研制使组装密度和性能得到提高，达到二维组装密度的极限；三维多芯片组装使组装密度达到一个新的高度，高速性能大大提高，同时力求降低制造成本。21世纪互联技术将继续沿着高密度和高速性方向发展。     

高密度居住区背景下的社区绿道建设实践 与思考：以上海市甘泉社区绿道为例

高密度居住区是亚洲许多城市广泛采用的一种居住 模式,但普遍存在诸多社会与环境问题。社区绿道在高密度城 市居住区内扮演着重要角色,它将居民与开放空间、基础设施 相连接,为居民提供日常休闲活动场所,在缓解社会与环境问 题中起着重要作用。首先,辨析高密度居住区背景下社区绿道 的内涵和特点,总结社区绿道在提升邻里聚居环境、完善绿色 基础设施、激活社区文化空间等方面的作用;其次,以上海市 甘泉社区绿道为例,探讨城市高密度居住区中的社区绿道实 践;最后,总结思考未来城市高密度居住区社区绿道建设的实 践方向。     

增强硬质聚氨酯泡沫塑料的压缩破坏行为

研究了玻纤、玻璃微珠增强材料增强的硬质聚氨酯泡沫塑料在静态压缩下泡孔结构的变化．实验结果表明，两种增强材料其压缩强度和模量都有不同程度的提高，但是其破坏方式则完全不同：玻纤增强的泡沫塑料的破坏方式为泡孔的塌陷和纤维的脱粘，而玻璃微珠增强的泡沫塑料的破坏方式为泡孔结构的破碎和玻璃微珠从基体脱粘或破碎。     

轻便取芯触探在护城河无损高精度定位中的应用

为在不破坏文物的前提下,尽可能地减少里耶古城遗址护城河的发掘工作量,并保证护城河底不被酉水河河水压力击穿,采用无损精确定位,成功地使里耶古城遗址护城河的无损定位误差小于0．1m,该方法对地质勘探、文物保护和矿山安全等有重要参考意义。     

酒酒球菌高密度培养条件的优化

酒酒球菌（Oenococcus oeni）主导的苹果酸-乳酸（MLF）发酵是优质葡萄酒生产的重要工艺环节,制备高活菌数的酒酒球菌发酵剂是保障该环节顺利进行的重要前提之一。研究发现,一定量的L-苹果酸可以有效促进酒酒球菌的生长,并通过高密度培养条件优化提高酒酒球菌菌体密度。结果表明,通过正交试验得出的最佳高密度培养条件为初始pH值5.1、接种量3%、L-苹果酸添加量1 g/L。在此优化条件下,酒酒球菌ES-1的菌体密度较高,为（7.33±0.40）×109 CFU/mL;进一步结合化学中和法和半连续培养法,可使最终菌体密度达（1.67±0.11）×1010 CFU/mL,是对照组的11倍。该研究获得的高密度培养优化方案可为制备优质本土酒酒球菌发酵剂奠定基础。     

无氟防水整理在化纤高密织物上的应用

采用无氟防水剂ECO ADV对化纤高密织物进行防水整理,优化的整理工艺为:无氟防水剂ECO ADV 50 g/L、防水增效剂XCR 10 g/L、三防整理渗透剂FN 5 g/L、焙烘温度170℃、车速40 m/min。化纤高密织物经无氟防水剂ECO ADV整理后再进行后整理加工(如涂层、贴合、复合等),色变小,防水性能稳定,且贴条强力较强,手感好,手抓白痕少。