用化学平衡法分析热机效率与排出废气中的NO含量的关系

重点分析了热机效率的提高与环境保护的关系 ,并建议在提高热机效率同时应考虑环境保护问题。     

四方蒿挥发油化学成分及应用研究

采用G-MS-DC联用方法，测定和鉴定了四方蒿精油的化学成分，其主要成分为蛇麻烯（12.02%)。β-蒎烯（11.98%)，异蒎莰酮（10.03%)，石竹烯氧化物（6.27%)，檀萜烯（4.28%),叶绿醇（8.12%)等45个化合物，其中有31个成分为首次从四方蒿中检出。     

论英国行政法的合理性原则

合理性原则是英国行政法的标志性原则.该原则兴起于积极行政的社会背景之下,集中体现着法治的实质精神,是普通法院控制行政裁量权滥用的基本准则.在适用范围上,该原则不仅拘束议会授予的行政裁量权,而且限制源于君主特权的行政裁量权.在适用要求上,认定行政裁量行为不合理的主要标准是背离法定目的、不相关考虑与非正常判断.     

空-地反辐射导弹效能评估方法研究

分析了建立反辐射导弹效能评估模型的必要性。根据不同的电子对抗等级 ,给出了反辐射导弹效能评估的不同实验方法。这些方法对反辐射导弹效能评估、战技指标论证及其鉴定验收有重要的理论参考价值     

近十年我国体育保险发展现状及对策

在我国,体育保险作为起步较晚的产业之一,近几年才逐渐展露身影,在一定程度上为推动我国体育事业的繁荣做出了贡献.通过本文对我国近十年体育保险发展状况的分析,能够更好的了解我国体育保险的发展现状,为有效发展我国体育保险业提供客观的科学理论依据,为繁荣我国体育保险市场提出合理的方法与建议.     

High-yield preparation of robust gold nanoshells on silica nanorattles with good biocompatiblity高产率制备无毒、稳定的纳米金壳夹心二氧化硅

Although gold nanoshells are widely considered as one of the promising photothermal nanomaterials used for biomedicine, the high cost, low yield and poor stability severely limit their potential application in clinical trials.Herein, robust gold nanoshells on silica nanorattles(GSNs)were easily prepared in a high yield by an improved seedmediated method employing polyvinylpyrrolidone(PVP) as a stabilizing and capping agent. The present method is very simple, effective and reproducible and can well control the growth process of gold nanoshells. The as-prepared GSNs have a narrow size distribution(<10 % in standard deviation). Furthermore, the utilization rate of Au in the solution used for the growth of gold nanoshells increases by 70 %than that in previous method. The resultant GSNs have a good structural stability after placing over 6 months due to the protection of PVP. More importantly, in vivo and in vitro toxic studies indicate that the GSNs have good biocompatibility. We believe that our preparation method will remarkably promote the use of gold nanoshells for biomedicine.     

Improvements of dielectric properties of Cu doped LaTiO_(3+δ)

The ceramic composites of Cu-doped La_(1-x )Cu_x TiO_(3+δ)(x=0.05, 0.15, 0.3, 0.5) were synthesized by conventional solid-state reaction. The complex dielectric properties of the composites were investigated as a function of temperature(77 K ≤T≤ 320 K) and frequency(100 Hz ≤ f ≤1 MHz) separately. In all composites, the dielectric constants increase monotonously and the dielectric loss undulates with temperature. And it is clearly observed that extraordinarily high low-frequency dielectric constant(～10~4)appear at room temperature in La_0.5Cu_0.5TiO_(3+δ), which is 100 times larger than that of La_0.95Cu_0.05 TiO_(3+δ). Interestingly, the dielectric constants increase remarkably with the doped Cu contents, meanwhile the dielectric loss for all samples is ideal lower than 1 at room temperature in the measured frequency range. By means of complex impedance analysis, the improvements of dielectric properties are attributed to both bulk contribution and grain boundary effect, in which the bulk polaronic relaxation and the Maxwell–Wagner relaxation due to grain boundary response are heightened remarkably with the high doped Cu contents.     

Flexible heat pipes with integrated bioinspired design

In this work we report the facile fabrication and performance evaluation of flexible heat pipes that have integrated bioinspired wick structures and flexible polyurethane polymer connector design between the copper condenser and evaporator. Inside the heat pipe, a bioinspired superhydrophilic strong-base-oxidized copper mesh with multi-scale micro/nano-structures was used as the wicking material and deionized water was selected as working fluid. Thermal resistances of the fabricated flexible heat pipes charged with different filling ratios were measured under thermal power inputs ranging from 2 W to 12 W while the device was bent at different angles. The fabricated heat pipes with a 30% filling ratio demonstrated a low thermal resistance less than 0.01 K/W. Compared with the vertically oriented straight heat pipes, bending from 30° up to 120° has negligible influence on the heat-transfer performance. Furthermore, repeated heating tests indicated that the fabricated flexible heat pipes have consistent and reliable heat-transfer performance, thus would have important applications for advanced thermal management in three dimensional and flexible electronic devices.     

南京市呼吸系统疾病死亡人数与气象因子的关系

利用2005年1月1日-2008年12月31日南京市逐日呼吸系统疾病死亡人数资料和同期气象资料,研究了气象要素变化对呼吸系统疾病死亡人数的影响.结果表明:南京市呼吸系统疾病死亡人数冬季最高,其次是春季,秋季和夏季较少;南京市逐日呼吸系统疾病死亡人数对气象要素变化的响应存在滞后性,春季滞后6-7 d,夏秋季滞后8-10 d,冬季滞后2-5 d;对风寒指数响应的滞后响应时间,春季7-8 d,夏季和秋季相关弱,冬季2-3 d;前期的空气污染和后期的剧烈降温叠加,可能是南京冬季呼吸系统疾病患者死亡的重要诱因;春季随着气温的回升,空气污染程度减轻,患者对气温变化的耐受性也延长了,但响应敏感性比冬季增强了;通过逐步回归,建立了冬季和春季南京呼吸系统疾病的死亡人数预报方程.     

An experimental study on the solubility of copper bichloride in water vapor

Using the solubility method, the solubility of CuCl2 in liquid-undersaturated HCl-bearing water vapor was investigated experimentally at temperatures of 330-370 ℃ and pressures of 4.2-10 MPa. The re-sults have shown that hydration could significantly enhance copper solubility and the concentrations of copper were positively correlated with PH2O. The solubility of copper in vapor phase increased with increasing PH2O at the constant temperature. CuCl2 was transported as hydrated species CuCl2(H2O)ngas in water vapor. The formation of complexes is proposed to be the result of the following reaction: CuCl2solid nH2Ogas = CuCl2 (H2O)ngas The hydration number n decreased slightly with increasing temperature. Statistical hydration numbers are 4.0, 3.6 and 3.3 at 330, 350 and 370 ℃ , respectively.