用常规雷达对运动目标进行横向一维高分辨成象

讨论了一种常规低分辨力雷达对运动目标进行横向一维高分辨力成象的方法，并通过计算机仿真证实了方法的可行性。这有助于实现常规雷达对目标的识别和分类。     

曲柄滑块机构最优解的解析计算方法

用优化设计方法,以曲柄滑块机构最小传动角为最大作为目标函数,给出了最优解的解析计算方法,从而得到机构的最佳设计。     

抽油机双圆弧齿轮减速器的优化设计

通过采用约束随机优化方法完成了抽油机减速系统在9个设计变量、25个约束条件下的优化设计,获得了其最佳设计方案,进一步证明了在抽油机减速器中采用双圆弧齿轮传动的优越性。     

乌拉泊土石坝模型动力特性试验研究

本文以乌拉泊土石坝工程为背景,在模拟地震振动台上进行了二维模型动力试验研究,定性或半定量地研究了坝体的动力特性,并根据试验结果对乌拉泊土石坝自振特性进行了估计。     

关于股份公司及其运作机制

本文探索了股份公司这一重要的企业形式的概念、性质、及股份公司的运行机制。认为股份制是一种比较理想的公众企业形式,它将在我国的经济体制改革中起重要的作用。     

关于综采采煤工艺及一些参数优化问题的探讨

本文根据大量的现场统计和实测资料,从采煤工艺角度分析了综采工作面诸因素与产量的关系,认为在我国应积极采用由中部斜切进刀衍生而来的端部斜切进刀、单向割煤、往返割一刀煤的采煤机进刀方式,得出了最佳工作面采高为3.0～3.3m,工作面长度为160～165m,走向长度为1000～1600m;讨论了影响综采设备潜能发挥的技术因素,并对如何提高综采面单产和装备水平问题进行了探讨。     

利用RT培司生产废料合成吡嗪-2,3,5,6-四甲酸的实验研究

利用从橡胶助剂RT培司(对氨基二苯胺)的生产废料中提取出来的吩嗪为原料,研究合成了吡嗪-2,3,5,6-四甲酸(H4pztc),采用IR进行分子结构表征。实验确定了吩嗪和高锰酸钾以摩尔比1∶14在中性条件下反应90 min时,可达最高收率73.8%。该研究解决了制造橡胶防老剂下游产品的综合利用问题,提高了废料利用价值,保护了环境;同时,大大降低了吡嗪-2,3,5,6-四甲酸的生产成本。     

高效脱硫菌的分离、鉴定及脱硫特性研究

从污水处理厂活性污泥中分离得到一株全新高效脱硫菌,通过生理生化特征及16S rDNA序列分析鉴定为多粘类芽孢杆菌(Paenibacillus polymyxa Y5)。对菌株的生长特性和脱硫能力进行研究的结果表明,菌株在pH 4~11的环境下生长良好,代谢产物呈碱性,最适生长温度为28~30℃。将脱硫菌接入生物滴滤塔中,1.5 d即完成挂膜,硫化氢脱除率为98%~100%。考察了稳定运行阶段进气质量分数、气体流量对脱硫效果的影响,在进气质量分数为0~700μg/g,气体流量为0.1~0.3 m3/h的条件下,硫化氢脱除率稳定在90%以上。     

Supercritical carbon dioxide assisted fabrication of biomimetic sodium alginate/silk fibroin nanofibrous scaffolds

In this study, biomimetic sodium alginate (SA)/silk fibroin (SF) scaffolds were successfully fabricated by supercritical CO₂ technology. The SA/SF scaffolds exhibited an interconnected porous and extracellular matrix (ECM)-like nanofibrous structures. Moreover, the SA microparticles were embedded in the SF scaffolds. Increasing the content of SA microparticles could improve tensile strength and compressive strength of the SF scaffolds and reduce the porosity of the SF scaffolds. The addition of the SA microparticles could also regulate the degradation rate of the SA/SF scaffolds. Furthermore, the results of in vitro biocompatibility evaluation, indicated that the SA/SF scaffolds exhibited no obvious cytotoxicity and higher cell adhesion ability and were more favorable for L929 fibroblasts proliferation than pure SF scaffolds. Therefore, the SA/SF scaffolds with ECM-like nanofibrous and interconnected porous structure have potential application in skin tissue engineering.     

Effects of Carbon and Oxygen Impurities on Luminescence Properties of BCNO Phosphor

The BN and BCNO phosphors were prepared at 750°C using different methods and their structure and luminescent properties were investigated. All the prepared samples were turbostratic boron nitride structure. The SEM and high‐resolution TEM images show that the BCNO phosphors are polycrystalline in nature and include some nanocrystals. The carbon and oxygen impurities have great effects on the excitation, emission, and absorption spectra of BN and BCNO phosphors. The first‐principle calculations results indicate that the carbon and oxygen impurities will produce energy levels in the band gap, which can affect the spectra properties of BCNO phosphors. The spectra properties of BN and BCNO phosphors can be well explained by a simplified energy level diagram.