玻璃熔接过程中的流变分析

继文献〔1〕的研究,针对激光于界面反射法定义及测定玻璃一个特性点时,双片玻璃试样熔接过程中的流变特性进行了理论分析,用简化的模型,探讨了上述方法的测定机制。     

政策碎片化对耕地“非粮化”的影响及其治理对策 ——以Z市J区Y镇为例

以耕地“非粮化”面积达90%以上的Z市J区Y镇为案例,研究了政策碎片化对耕地“非粮化”的影响及其治理对策。研究发现,“单兵突进”的征地拆迁政策、“效力渐弱”的种粮补贴政策和“前后矛盾”的地方产业政策都是影响耕地“非粮化”的重要因素。建议从整体性视域出发,采取构建整体性政府行政机制以恢复农田系统、补贴政策由“种粮”向“收粮”转变、强化系统治理以统筹产业发展与耕地保护等治理对策,以有效解决耕地“非粮化”问题。     

卫星光通信中平台抖动补偿技术研究

以卫星光通信系统为例,对空间光通信系统中光学平台的抖动进行了分析。研究了一种自调节前馈补偿技术,通过自适应信号处理或对前馈控制器进行直接优化,可对光学平台的抖动进行有效抑制。     

空间光通信ATP技术及其进展

对自由空间激光通信光束自动捕获、跟踪、瞄准（ＡＴＰ）系统的结构与系统主要技术指标进行了分析和讨论。通过对其中典型系统的介绍,进一步描述了ＡＴＰ技术的最新进展,论证了空间激光通信的可行性。     

采矿工程研究生培养及教学方式的探索与实践

结合重庆大学采矿工程学科研究生教育和培养的理论与实践,重点阐述对研究生培养及改革教学方式的有益探索,其成果为我国工科研究生培养提供了可借鉴的成功经验。     

基于BSC和EVA整合战略管理的应用研究

战略管理是企业成功的关键所在。目前企业战略管理面临的一个最大问题是精心制定的战略无法得到有效的实施。本文引入平衡记分卡与经济增加值两个互补性很强的管理工具,运用层次分析法将其整合为公司全面的战略管理框架及其评价体系,以推动企业战略的成功实施。     

共生理论视域下我国融合教育发展的困境与反思

作为一种全新的教育理念,融合教育自提出以后很快成为国际特殊教育的发展趋势。当前,我国融合教育在取得巨大进步的同时,在融合主体的接纳态度与行动支持、教师专业能力与合作意识、融合课程与教学、融合资源投入与共享等方面仍然面临困境。基于共生理论视角对融合教育困境进行理论反思,提出构建融合共生的社会文化环境、建立教师专业学习社群、调整课程与教学、完善资源配置等建议,以期为推进融合教育、提升融合教育质量提供借鉴。     

Dose‐Response Models Incorporating Aerosol Size Dependency for Francisella tularensis

The effect of bioaerosol size was incorporated into predictive dose‐response models for the effects of inhaled aerosols of Francisella tularensis (the causative agent of tularemia) on rhesus monkeys and guinea pigs with bioaerosol diameters ranging between 1.0 and 24 μm. Aerosol‐size‐dependent models were formulated as modification of the exponential and β‐Poisson dose‐response models and model parameters were estimated using maximum likelihood methods and multiple data sets of quantal dose‐response data for which aerosol sizes of inhaled doses were known. Analysis of F. tularensis dose‐response data was best fit by an exponential dose‐response model with a power function including the particle diameter size substituting for the rate parameter k scaling the applied dose. There were differences in the pathogen's aerosol‐size‐dependence equation and models that better represent the observed dose‐response results than the estimate derived from applying the model developed by the International Commission on Radiological Protection (ICRP, 1994) that relies on differential regional lung deposition for human particle exposure.     

Partitioned log-rank tests for the overall homogeneity of hazard rate functions

In survival analysis, it is routine to test equality of two survival curves, which is often conducted by using the log-rank test. Although it is optimal under the proportional hazards assumption, the log-rank test is known to have little power when the survival or hazard functions cross. To test the overall homogeneity of hazard rate functions, we propose a group of partitioned log-rank tests. By partitioning the time axis and taking the supremum of the sum of two partitioned log-rank statistics over different partitioning points, the proposed test gains enormous power for cases with crossing hazards. On the other hand, when the hazards are indeed proportional, our test still maintains high power close to that of the optimal log-rank test. Extensive simulation studies are conducted to compare the proposed test with existing methods, and three real data examples are used to illustrate the commonality of crossing hazards and the advantages of the partitioned log-rank tests.