航空相机检测仪系统的设计与实现

航空相机是一种重要的机载光电设备，在航空对地测绘等领域有着较为广泛的应用，为方便、直观地对航空相机进行地面检测，设计和实现了一种配套某型航空相机的检测仪系统。根据航空相机地面保障设备任务书和相机与地保设备通讯协议，给出了检测仪系统的功能需求。根据相机的接口要求和系统计算能力的要求，设计了检测仪系统的硬件方案。根据软件部分的功能需求，提出了一种新的分层架构，同时详细论述了软件系统的关键技术，描述了程序的运行流程，给出了检测仪系统的软件设计方案，并在VC6.0环境下实现了检测仪软件系统。针对检测仪的工作方式，设计了测试流程，并根据流程对检测仪进行了详尽的测试，经多次测试，检测仪工作正常。测试结果表明，检测仪系统满足了对其功能的全部要求，运行稳定，操作简便，显示直观，可以应用于航空相机地面保障任务。     

丁草胺和苄嘧磺隆对2种沉水植物的生物毒性

[目的]旨在为评估农田除草剂对非靶标水生植物的生态风险提供依据。[方法]评价了丁草胺和苄嘧磺隆对沉水植物黑藻和竹叶眼子菜的生物毒性。[结果]丁草胺和苄嘧磺隆分别从1、0.05 mg a.i./L的质量浓度开始显著降低黑藻和竹叶眼子菜的叶绿素含量。丁草胺对黑藻和竹叶眼子菜鲜质量的12dED50值分别为1.16、3.91mga.i./L,而苄嘧磺隆的分别为0.003 3、0.087 mg a.i./L。[结论]丁草胺和苄嘧磺隆均为易危害非靶标水生植物的除草剂,且苄嘧磺隆的危害潜力更大。     

含柚皮苷单宁成分收敛水的制备及相关性质研究

研究含柚皮苷、单宁的化妆水,进行收敛、舒缓方面的功效评价实验。结果:提取液中单宁的含量为1.702 mg/mL,提取率22.693mg/g;保湿体系的最佳条件组合丙二醇︰甘油︰丁二醇︰吡咯烷酮为:20︰15︰5︰2;本实验化妆水配方柚皮苷用量1 mg/mL和单宁用量0.15mg/mL;筛选出最佳保湿体系配比,所配制的化妆水具有收敛、舒缓和抗菌等功效。     

Influence of Composition on Self-toughening and Oxidation Properties of Y-α-Sialons

Y-α-sialon ceramics with different compositions were hot-press sintered. Varying the m or n value in theα-Sialon general formula, both the α-sialon grain morphology and phase assemblages present diversification, therefore, affecting the toughness and hardness. Meanwhile, varying the compositional parameters also influenced the composition and structure of the intergranular glass phase, as well as its oxidation behavior at 1100-1200 ℃. The oxidation of the intergranular phase Mt in the Y-α-sialon ceramics was significantly enhanced with further rising the oxidation temperature to 1300 ℃.     

Redesigning China’s superblock neighbourhoods: policies,opportunities and challenges

In February 2016, China’s State Council released a set of guidelines representing a change in the country’s approach toward neighbourhood design: to move away from superblock neighbourhoods and create a finer network of urban blocks and streets. The paper traces the circumstances that prompted this change, drawing on a comparative review of international literature and practice, and explores the opportunities and challenges for urban design. While modifications of the superblock are somewhat overdue, this current mode of organization should not be entirely abandoned. The suggestions and overall blueprint warrant a more circumspect approach and should be adopted with discretion.     

Preparation,cure kinetics,and thermal properties of novel acetylene terminated silazanes

A new kind of acetylene terminated silazanes, N‐(3‐acetylenephenyl)‐diorganosilazanes (abbreviated as APSZs) with three kind of substituents, were synthesized by the aminolysis of dichlorosilane with 3‐aminophenylacetylene (3‐APA). Structure of APSZs was confirmed by Fourier transform infrared spectroscopy (FT‐IR) and nuclear magnetic resonance (NMR). Thermal behavior of the cured silazanes was determined by thermogravimetry analysis (TGA), revealing that cured silazanes exhibited high temperature resistance. The ceramic yields of APSZ‐Me₂, APSZ‐MeVi, and APSZ‐Ph₂ at 1000°C under nitrogen were 77.6, 81.9, and 68.7%, respectively. The peak separation of derivative thermogravimetric data was employed to evaluate the three major regions of the thermolysis, and the kinetic parameters of thermolysis were calculated by the method of Kissinger from dynamic thermogravimetric measurement in nitrogen atmosphere at several different heating rates. Influence of substituents on the thermal behavior of cured silazanes in each separated region was discussed. The results showed that the vinyl derivative exhibit higher thermal stability than methyl and phenyl derivatives due to the high decomposition activation energy and small pendant group. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012     

建筑工程施工招投标问题新议

当前在建筑工程施工招投标中有许多突出问题亟待解决,如低价中标、借资质围标、难以择优选择施工企业,以及招标人、投标人缺少应有权利等问题.为此,从招投标相关政策法规、政府职能及从业者行为,到具体招投标方法,以及建筑行业和社会问题对招投标的影响等方面分析问题之所以产生的原因,探讨解决问题的途径和方法.力求揭示问题深刻,分析问题准确深入,方法合理有效.     

Use of secondary data to estimate instantaneous model parameters of diabetic heart disease: Lemonade Method

With the increasing burden of chronic diseases on the health care system, Markov-type models are becoming popular to predict the long-term outcomes of early intervention and to guide disease management. However, statisticians have not been actively involved in the development of these models. Typically, the models are developed by using secondary data analysis to find a single “best” study to estimate each transition in the model. However, due to the nature of secondary data analysis, there frequently are discrepancies between the theoretical model and the design of the studies being used. This paper illustrates a likelihood approach to correctly model the design of clinical studies under the conditions where (1) the theoretical model may include an instantaneous state of distinct interest to the researchers and (2) the study design may be such that study data cannot be used to estimate a single parameter in the theoretical model of interest. For example, a study may ignore intermediary stages of disease. Using our approach, not only can we accommodate the two conditions above, but more than one study may be used to estimate model parameters. In the spirit of “If life gives you lemon, make lemonade”, we call this method “Lemonade Method”. Simulation studies are carried out to evaluate the finite sample property of this method. In addition, the method is demonstrated through application to a model of heart disease in diabetes.