药物分析课程教学改革与学生创新能力培养的探索

为加强学生创新能力的基本素质培养 ,在药物分析课程教学中注重教材内容的先进性和科学性与多种教学方式的探索 ,并力求通过课堂教学和实践教学在内容上和形式上的科学、合理的安排 ,最终培养学生在我国药物研究从仿制为主到创制新药为主的历史性转变中 ,具备为提高药品质量所需的独立分析问题和解决问题的能力     

卡瓦胡椒质量评价研究概况

从卡瓦胡椒的活性成分、质量影响因素和质量控制技术三个方面对其质量评价研究进行了综述。卡瓦胡椒是近年来在西方国家最畅销的植物药之一,用于焦虑症的治疗,具有无成瘾性、耐受性好等优点,备受人们的关注。     

决明子降血脂有效部位及其量效关系的实验研究

目的研究决明子降血脂的有效部位及其量效关系。方法选用CO超临界、系统溶媒(石油2醚、乙酸乙酯、70%乙醇、水)和水提醇沉的方法分别对决明子进行提取,观察各提取物对腹腔注射蛋黄乳液致高血脂症模型小鼠血清总胆固醇及甘油三酯的影响,初步明确决明子降血脂的有效活性部位,并对该有效部位进行量效关系的评定。结果决明子乙酸乙酯提取物和水提取物均有显著的降低血清总胆固醇和甘油三酯的作用,其中乙酸乙酯提取物的降脂效果优于水提取物,其在0.75～1.00g·kg-1·d-1时降脂效果最佳;决明子70%乙醇提取物和水提醇沉物虽也有一定的降血脂作用,但与对照组相比差异无统计学意义。结论决明子乙酸乙酯提取物为决明子降血脂的有效活性部位,其有效剂量范围在0.50～1.25g·kg-1·d-1之间。     

茶色素中两个苯骈酚酮类化合物的分离和鉴定

从茶色素中分离得到2个苯骈卓酚酮类化合物,经化学方法与光谱分析鉴定为7,8,9-三羟基苯骈卓酚酮和7,8,9-三羟基-4-羟基苯骈卓酚酮.该类化合物是首次从茶色素中分离得到的主要色素类成分.     

胸部叩击及气流震荡叠加主动周期性呼吸在肺部感染性疾病中的应用

呼吸系统的疾病病因大都是来自肺部感染，感染的病因中细菌引起的肺炎最为常见。如肺炎链球菌、肺炎杆菌、大肠杆菌、绿脓杆菌等，肺部感染的早期治疗护理尤为重要，尤其是肺部异常分泌物的去除更为重要，而肺部异常分泌物的去除除了常规使用抗炎及对症治疗外，     

Compensated active noise cancellation earphone for audiometric screening tests in noisy environments

Abstract

Objective: This study investigated hearing screening tests by using a custom-designed compensated hybrid active noise cancellation (ANC) earphone and compared it with TDH39 and Audiocups audiometric earphones under conditions of quiet, 45?dB HL masking narrowband, wideband speech-shaped, and white noise.

Design: The hearing screening tests were conducted to characterise the shifts of screening results under noisy conditions, and real-ear attenuations at thresholds were assessed to quantify real-ear noise reduction performance.

Study sample: Twenty-four normal-hearing adults, aged 20–25?years, participated in this study.

Results: The ANC earphone exhibited significantly lower/better mean screening results than those of the TDH39 earphone at 250 and 500?Hz and those of the Audiocups earphone at 250?Hz under conditions of narrowband, speech-shaped, and white noise. Compared with the TDH39 earphone at 250 and 500?Hz, applying a hybrid ANC earphone reduced the shifts in screening results by 14.2 and 12.3?dB, respectively, under the narrowband noise condition.

Conclusion: This study demonstrated that the compensated hybrid ANC earphone provided lower shifts of screening results than the TDH39 and Audiocups earphones and that it was capable of screening at 250 and 500?Hz from 20?dB HL under 45?dB HL masking narrowband and wideband noise.     

Optimization of breast lesion segmentation in texture feature space approach

This paper develops a method for semi-automatic detection of breast lesion boundaries by combining the snake evolution techniques with statistical texture information of images. We propose an efficient image energy function in segmentation based on image features, first-order textural features and four n × n masks. The segmentation results were evaluated by using area error rate. The image features were evaluated qualitatively by using the contrast-to-noise ratio and fractal dimension analysis. In our study, standard deviation, skewness and entropy are indicated as being the most relevant image features.     

基于人体微观生理大数据的主动感知临床应用研究

介绍人体微观生理系统及大数据线性规划模型的建立，阐述主动感知临床应用的处理算法，对系统性能进行验证，多位患者的一周内临床应用实验证明该方案在算法能耗、数据精度和临床满意度等方面均表现优秀。