亚马逊首款智能手机Fire Phone发布

美国亚马逊公司发布其首款智能手机——Fire Phone.     

连杆曲线尖点研究（2）——尖点位置与可实现性研究

本文应用解析法对平面铰连四杆机构的连杆曲线尖点进行研究，得到该类曲线的尖点在固定坐标系中的位置及可能被实现的尖点数目，相应机构结构参数的关系式与相应的取值范围     

玉米机收正当时

立秋已过,玉米收获的黄金季节就要到来,广大农民、农机户特别是农机推广部门应当不失时机地大力推广玉米收获机械,为实现玉米生产机械化做出新的贡献.     

0412-1961

用ZrO_2固体电解质组成氧浓差电池:(-)Re,In,In_2O_3     

Characteristics of effects of mu-, delta-, and kappa-opioid agonists and enkephalinase inhibitor RB101 in rats of two inbred strains]

OBJECTIVE: In a attempt to avoid the potential drawbacks associated with sternotomy coupled with a desire for a smaller scar led us to investigate the transxiphoid approach without sternotomy. We present our preliminary experience and a comparison between the sternal and thoracic approaches. METHODS: From June 1996, at the Institut Cardiovasculaire Paris Sud, Massy, France (ICPS) and the Heart Institute, Sao Paulo, Brazil (HI) the transxiphoid approach was adopted for the correction of selected congenital cardiac defects. The xiphoid was resected through a 6 cm long vertical skin incision. With a special retractor the sternum was elevated cephalad and anteriorly. Closure of the defect was performed in the conventional manner. Twenty-six patients; 17 boys and 9 girls were entered into the study from representing 19 atrial septal defects (ASDs), 4 ventricular septal defects (VSDs) and 3 partial atrio ventricular septal defect (AVSDs). In addition at ICPS the transxiphoid approach for correction of ASD was compared to the thoracic and sternal approaches performed in the same period. RESULTS: Both the aortic cross clamp time as well as the duration of extracorporeal circulation were increased when compared to either standard sternotomy or thoracotomy approaches. There were no differences within the groups when comparing body surface area, amount of chest drainage or length of either ICU or hospital stay. However the patients in the transxiphoid group showed less pain and respiratory discomfort. CONCLUSION: Our initial experience with the transxiphoid approach without sternotomy confirms that it is a promising technique that can be considered an alternative to conventional sternotomy. The access is adequate for surgical procedures performed through a right atriotomy. The advantages include a better cosmetic scar, less surgical trauma, minimal respiratory discomfort and a potentially lower risk of infection. However cardiopulmonary bypass and cross clamp times are increased. There were no complications, and patient satisfaction was high.     

Carbamazepine responsive epileptic oral motor and ocular motor apraxia

We evaluated seven patients with oral motor apraxia and ocular motor apraxia. Apraxia in three patients (Group 1) with new-onset partial seizures and epileptiform discharges on EEG improved with carbamazepine. Four patients (Group 2) without seizures and nonepileptiform EEG findings had no change in apraxia after a trial of carbamazepine. Epileptic apraxia may precede clinical seizures and can respond to antiepileptic drugs.     

The indications for operations on the penile veins in venogenic erectile impotence

Unsatisfactory results of surgical management of venous erectile failure are attributed to difficult selection of relevant patients. The operation is to be performed in patients with isolated distal venous outflow. The diagnosis of occult proximal or mixed outflow may be made at dynamic cavernosography with loading test on the device for stimulation of erection. After obtaining the erection and removal of the constriction ring, distal venous outflow is blocked, thus creating the conditions for detection of occult proximal venous outflow. Surgical treatment (ligation of the dorsal vein or its insertion under tunica albuginea) is indicated only for patients free of mixed venous outflow.     

Activities of isoniazid alone and in combination with other drugs against Mycobacterium avium infection in beige mice

Atypical gunshot wounds due to ricochet and intermediate targets have been well described in the literature. We represent a case of suicide with an atypical entrance wound and bullet without rifling marks due to 9 mm ammunition being loaded and fired from a 40 caliber semiautomatic pistol.     

动态随机载荷识别技术研究

本文推导了在频域中识别动态随机载荷的基本公式，并在此基础上结合数字信号处理技术，有元分析法与误差理论，探讨了识别坦克车辆在行驶过程中行动部分所受的动态随机载荷的方法。     

氧化铝厂石灰炉炉底转盘跑偏分析与改造

对石灰炉炉底转盘经常跑偏问题进行受力分析和在线测试，并对炉底转盘机构进行了改造。