基于VB的民用飞机低温符合性验证模型

民用飞机正常情况下一般采取双套空调组件对驾驶舱和客舱进行温度调节,双套空调组件失效会导致乘员暴露于低温环境,可能会导致机组能力降低,从而影响飞行安全;基于适航条款CCAR25.1309(a)(b)(d)对民用飞机的设计要求,本文通过定义一种符合性方法,并基于VB平台开发出民用飞机低温失效的符合性计算模型,来验证对适航条款§25.1309(a)(b)和(d)的符合性,从而对民用飞机的适航验证具有指导意义。     

民用飞机含高能转子的设备适航符合性验证方法研究

本文介绍了§25部适航条款中对民用飞机含高能转子的设备的要求,研究了含高能转子的设备的符合性方法和验证思路,提出了基于转子包容性试验对含高能转子的设备进行验证的一种方法,设计了试验程序和试验判据,通过在某型民用飞机适航取证的实践,表明该方法合理有效,能够支持民用飞机含高能转子设备的适航符合性验证。     

民用飞机设计人为因素适航关键点解析

本文以25.1302条款为基础,从民用飞机设计人为因素适航审查和适航符合性验证的角度出发,提出了民用飞机设计人为因素适航相关的关键点:人为因素设计理念、人为因素设计特征识别及过程介入、人为因素新颖设计特征、差错管理,并对关键点进行了简要解析。为我国民用飞机人为因素适航相关从业者提供一定的参考作用。     

民用飞机高速特性专用条件与符合性验证方法分析

主要分析了民用飞机高速保护功能所产生的专用条件和适航符合性验证方法 。     

民用飞机偏航机动飞行载荷适航技术研究

民用飞机飞行必须保证飞机符合最低安全要求,即适航标准。对飞行载荷专业来说,进行载荷设计计算以表明对适航标准的符合性,是一个极其重大的课题。飞行载荷设计人员要表明对适航标准的符合性,顺利地通过适航取证,需要对适航技术进行仔细研究。本文选取了偏航机动适航条款为研究对象,对其条款的理解和符合性验证方法进行了深入的研究和探讨。     

民用飞机空调设备验证爆破压力确定及验证方法研究

本文给出了一种民用飞机空调设备验证爆破压力的确定方法 ,并对验证爆破压力适航条款的符合性的试验验证方法进行了研究,为空调设备的验证爆破压力条款的符合性验证提供了参考。     

大型民用飞机前轮转弯系统适航条款研究

本文介绍了欧洲宇航局的前轮转弯系统的适航条款,分析了条款内容,根据适航要求,提出了前轮转弯系统设计时应考虑的方面,给出了建议的符合性验证方法,对民用飞机适航取证具有指导意义。     

民用飞机对CCAR25.1438条款的符合性验证思路探讨

本文对民用飞机适航条款§25.1438的要求进行了研究和解析,系统地梳理和归纳出与本条款相关的系统验证考虑,提出了建议性的符合性验证思路。     

民用飞机机载电子硬件测试策略研究

结合RTCA/DO-254以及机载电子硬件适航符合性验证过程中的工程经验,提出了一套完整的民用飞机机载电子硬件测试策略。     

民用飞机航电系统地面试验室适航符合性验证试验(MoC4)流程的研究

本文总结了民用飞机航电系统在地面试验室开展适航符合性验证试验(MoC4)的一般试验流程,详细分析了试验构型的符合性说明方法,从试验件、试验设施、质量体系、试验程序和人员资质等方面详细阐述了其能够满足符合性所应具备的条件。     

中国饲料工业协会第五届理事会顾问、会长、常务副会长、副会长、秘书长、副秘书长、常务理事、理事名单

顾问刘中一张德邻宋瑞祥聂振邦张子仪戎易王维四会长白美清国务院原副秘书长、第四届理事会会长常务副会长(8人,以姓氏笔划为序)刘永好新希望集团董事长、第四届理事会副会长刘汉元通威股份有限公司董事长、第四届理事会副会长陈丹广东恒兴集团股份有限公司董事长、第四届理事会副会长张延喜农业部原副部长、第四届理事会副会长吴明夏湖南正虹科技发展股份有限公司董事长、第四届理事会副会长陶一山唐人神集团股份有限公司董事长、第四届理事会副会长温鹏程广东温氏食品集团有限公司董事长、第四届理事会副会长谭竹洲原化学工业部副部长、第…     

Evidence for the non-involvement of the uterus in the lifespan of the corpus luteum in the cyclic dog

Progesterone levels in peripheral blood of dogs were analysed during the cycle in which hysterectomy (n = 5) or sham surgery (n = 3) was performed as well as during the cycle of dogs (n = 5) hysterectomized at least one year prior to this study; the data were compared with the findings in control dogs (n = 3). The averages of the duration of the luteal period observed in the three experimental groups were not significantly different from those of control dogs. Immediately after surgery, the progesterone level decreased from 25 to 50% of the presurgical level, but returned to presurgical level in about four days. Prolactin levels were elevated for about 30 h after surgery. Nevertheless, the averages of the mean prolactin levels for each animal during the luteal period of the experimental groups were not significantly different from those of control dogs. It is concluded that in the dog, the uterus is not involved in the lifespan of the cyclic corpus luteum.     

浅谈对症用药

对症用药就是通过对患病信鸽的症状进行诊断,进而确定病属,选择药物及如何用药的方法。     

军犬鉴别中的嗅源培养和易出现的问题及对策

嗅源是军犬嗅觉作业训练的依据.军犬鉴别中嗅源能力的培养在整个鉴别训练中占有重要地位,关系到鉴别训练的成败和鉴别能力的提高.所以,军犬在嗅认嗅源时必须按照训犬员的指令充分、细致地感受嗅源气味,并且对嗅源气味产生兴奋反应.如何培养军犬充分嗅认嗅源以及及时解决嗅认过程中出现的问题,成为我们进行鉴别训练的关键.……     

The influence of the width of the saddle tree on the forces and the pressure distribution under the saddle

As there is no statistical evidence that saddle fit influences the load exerted on a horse's back, this study was performed to assess the hypothesis that the width of the tree significantly alters the pressure distribution on the back beneath the saddle. Nineteen sound horses were ridden at walk and trot on a treadmill with three saddles differing only in tree width. Kinetic data were recorded by a sensor mat. A minimum of 14 motion cycles were used in each trial. The saddles were classified into four groups depending on fit. For each horse, the saddle with the lowest overall force (LOF) was determined. Saddles were classified as "too-narrow" if they were one size (2 cm) narrower than the LOF saddle, and "too-wide" if they were one size (2 cm) wider than the LOF saddle. Saddles two sizes wider than LOF saddles were classified as "very-wide". In the group of narrow saddles, the pressure in the caudal third (walk 0.63 N/cm(2)+/-0.10; trot 1.08 N/cm(2)+/-0.26) was significantly higher compared to the LOF saddles (walk 0.50 N/cm(2)+/-0.09; trot 0.86 N/cm(2)+/-0.28). In the middle transversal third, the pressure of the wide saddles (walk 0.73 N/cm(2)+/-0.06; trot 1.52 N/cm(2)+/-0.19) and very-wide saddles (walk 0.77 N/cm(2)+/-0.06; trot 1.57 N/cm(2)+/-0.19) was significantly higher compared to LOF saddles (walk 0.65 N/cm(2)+/-0.10/ 0.63 N/cm(2)+/-0.11; trot 1.33 N/cm(2)+/-0.22/1.27 N/cm(2)+/-0.20). This study demonstrates that the load under poorly fitting saddles is distributed over a smaller area than under properly fitting saddles, leading to potentially harmful pressures peaks.     

Observations on the Pathology of the Spleen of the Cat

Abstract— Lesions were found in the spleen of four of sixty-three cats examined post mortem in the department, and comprised two examples of lymphosarcoma, one of chronic fibrinous peritonitis and one of subcapsular haematoma. Abnormalities were found in two cat spleens received from veterinary surgeons in general practice. In one cat the abnormalities were an haemangiosarcoma with secondary deposits in the liver and in the other extensive mast cell infiltration. In addition lesions were detected in the spleen of three of eighty-seven cats examined post mortem in general practice. The lesions were: multiple secondary deposits of adenocarcinoma from a primary tumour of the mammary gland, a ruptured spleen and a foreign body below the splenic capsule. Résumé— L'examen microscopique de soixante-trois chats pratiqué dans le service a permis de rencontrer quatre fois des lésions de la rate, dont deux lymphosarcomes, une péritonite capsulaire fibrineuse et un hématome sous-capsulaire. D'autre part des lésions ont été trouvées dans deux rates de chat expédiées par des vétérinaires exerçant en pratiaue générale. Chez un chat il s'agissait d'un htmangiosarcome avec métastases hépatiques et chex l'autre d'une infilt ation diffuse par des mastocyta. De plus, on a rencontré des llésions dnas la rate de trois chats parmi quatre-vingt sept autopsies effectuées dans le cadre d'une clientèle génárale. Ces iésions étaient dés métastases multiples d'un adénocarcinome dont la tumeur primitive siègeait dam la glande mammaire, une rupture de la rate et un corps érangers sou capsulaire. Zusammenfassung— Läsionen der Milz wurden bei vier von dreiuiidsechzig in dieser hbteilung sezierten Katzen gefunden, und zwar in zwei Fällen ein Lymphosarkom, in einem Falle eine chron-ische fibrinöse Peritonitis und in einem ein subkapsuläres Hématom. Anomalien fanden sich auch in der Milz von zwei Katzen, die aus der tierxrztlichen Praxis eingesandt wurden. Bei der einen Katze war dies ein Hämangiosarkom mit Metastasen in der Leber, bei der anderen eine weitläufige Infiltration der Mastzellen. Außerdem wurden bei drei von siebenundachtzig in der Praxis sezierten Katzen Milzläsionen gefunden. Diese bestanden am multiplen Metastasen eines Adenokarzinoms der Brustdrüse, einer Milzzerreissung und einem Fremdkörper unterhalb der Milzkapsel.