电动汽车制动能量回收系统研究

为进一步提高电动汽车的能量利用效率以改善其续驶里程,开发了一套电动汽车制动能量回收系统。系统结构简单,可靠性高,并具有机械制动备份功能。同时,考虑到电动汽车电动机和电池性能参数,开发了高效的再生制动控制策略,算法具有较强的移植性。采用硬件在环的方式对系统的控制效果和制动能量回收效率进行了仿真测试。结果表明,再生制动力和摩擦制动力可以很好地协调运作,同时有效地回收制动能量。最后,在燃料电池汽车上进行转鼓实验,很好地完成了Japan-1015循环工况,能量回收效率高达59.15%。     

冷却剂参数对铣槽喷管低周疲劳寿命的影响

采用有限体积流固耦合计算方法、非线性有限元热结构耦合分析方法和局部应变法研究大面积比铣槽喷管三维再生冷却槽道在循环工作条件下的热结构变形与低周疲劳寿命,并对比分析了冷却剂质量流量与入口温度对铣槽喷管疲劳使用寿命的影响。计算结果表明,铣槽喷管热结构响应呈现复杂的三维效应,应变较大位置主要分布在与肋连接的内衬区域,喷管中部的残余应变量最大；冷却槽道低周疲劳寿命分布和热结构响应基本一致,最小寿命位于喷管中部与肋相连的内衬区域燃气侧；随冷却剂质量流量增加,铣槽喷管低周疲劳寿命不断提高；随冷却剂入口温度增加喷管尾部低周疲劳寿命值不断降低,而喷管中前部的低周疲劳寿命值却不断提高,当冷却剂入口温度为280K左右时,本文的铣槽喷管总体使用寿命达到最大。      

Long-Term Follow-up of Superficial Digital Flexor Tendonitis Treated by a Single Intralesional Injection of a ReGeneraTing Agent in 51 Horses

ReGeneraTing Agents (RGTA) are nanopolysaccharides engineered to mimic heparan sulfates and have been shown to stimulate tissue repair and healing (skin, cornea, gingival, and muscle) in several animal models of injury and in human medicine. A preliminary study, monocentric and uncontrolled, was conducted to evaluate the efficacy of a dedicated RGTA (named Equitend) in improving the healing quality of the injured tendon after a single and ultrasound-guided intralesional injection. Improvement of ultrasonographic appearance of tendinous or ligamentous lesion was documented at least over 4 months in Equitend-treated horses and was further supported by another study on superficial digital flexor tendonitis, in 51 horses (16 French Standardbred trotters (ST), 13 Thoroughbreds (TB), and 22 eventers). Long-term follow-up of these horses showed high rates of return to racing, with 95% of eventers, 87.5% of French ST, and 77% of TB. The mean duration before the first race or competition was 6.6 and 7.4 months for ST and eventers, respectively. The group of 16 treated ST was then compared with a matched control group, showing that the Equitend-treated group was able to return to a higher level of earning after lesion (74% vs. 15% in the control group). Furthermore, the Equitend-treated group was back in racing 2.4 months earlier than the control group.     

玉米雌幼穗培养再生植株变异性状的遗传 I 再生植株R_1性状变异

考查由玉米雌幼穗培养获得的63棵再生植株R_1的自交结实性,以及R_1自交结实植株的株高、果穗、籽粒等多种性状,均表现出不同程度的变异.11R_1株高矮化率为52.2%.在11R_1中,有7棵再生株轴色由原来自交系的白色突变为紫红色.33棵自交结实再生株中,有4棵粒色由原自交系的橙黄色突变为紫红色.结果表明:所有再生株R_1都发生了性状变异.     

冷却剂参数对铣槽喷管低周疲劳寿命的影响

采用有限体积流固耦合计算方法、非线性有限元热结构耦合分析方法和局部应变法研究大面积比铣槽喷管三维再生冷却槽道在循环工作条件下的热结构变形与低周疲劳寿命,并对比分析了冷却剂质量流量与入口温度对铣槽喷管疲劳使用寿命的影响。计算结果表明,铣槽喷管热结构响应呈现复杂的三维效应,应变较大位置主要分布在与肋连接的内衬区域,喷管中部的残余应变量最大;冷却槽道低周疲劳寿命分布和热结构响应基本一致,最小寿命位于喷管中部与肋相连的内衬区域燃气侧;随冷却剂质量流量增加,铣槽喷管低周疲劳寿命不断提高;随冷却剂入口温度增加喷管尾部低周疲劳寿命值不断降低,而喷管中前部的低周疲劳寿命值却不断提高,当冷却剂入口温度为280K左右时,本文的铣槽喷管总体使用寿命达到最大。      

Autologous Platelet Concentrates as an Adjunctive Treatment for Chronic Laminitis in a Mare with Pituitary Pars Intermedia Dysfunction

The aim of this article was to describe a case of a 7-year-old mare with chronic laminitis secondary to pituitary pars intermedia dysfunction that was successfully treated with autologous platelet concentrates (APC) obtained by the tube method, 4 months before being treated with oral pergolide. After the diagnosis of pituitary pars intermedia dysfunction, the patient was treated with three intralesional injections of APC at 10-day intervals. APC presented a mean concentration of 430 ± 22 × 10⁶ platelets and 8.6 ± 1.3 leukocytes/mL. The treatment with APC produced growth of the hooves at a rate of 5 mm/wk and substantially reduced the foot pain (lameness) after two APC applications. The mare could be ridden 2 weeks after the third APC treatment. The treatment with oral pergolide 4 months later improved the clinical picture of the patient, albeit hirsutism remained. APC could be useful as adjunctive treatment of chronic laminitis in horses. However, additional clinical studies are necessary to determine the safety and effectiveness of APC in chronic laminitis.     

红掌“火焰”、“阿拉巴马”组培快繁及再生方式的研究

以红掌‘火焰’、‘阿拉巴马’的叶基、叶片及叶柄作为外植体,探讨其愈伤组织的诱导及分化,揭示其再生方式,实现组培快繁。采用常规组织培养的方法,设定不同的激素组合,通过不同外植体诱导分化途径的调查分析,探讨其再生方式。结果表明,不同外植体愈伤组织的诱导率,‘火焰’为叶柄＞叶基＞叶片,‘阿拉巴马’为叶基＞叶柄＞叶片。‘火焰’、‘阿拉巴马’嫩梢的再生方式既有器官再生又有体胚再生,在6-BA1.0 mg/L的培养条件下,‘火焰’器官再生率最高比例达到91%,体胚再生率为54%,2种方式均有比例为50%;‘阿拉巴马’器官再生率最高比例为62%,体胚再生率为57%,2种方式均有比例为57.1%。‘火焰’胚性愈伤组织在6-BA 0.5和1.0 mg/L的培养基中的萌发率,分别为55%和46%,‘阿拉巴马’分别为71%和66%。‘火焰’、‘阿拉巴马’2个品种、3类外植体再生方式研究发现其既有器官再生又有体胚再生,前期是以器官再生为主,后期以体胚再生为主。