矿山设备润滑磨损状态智能分析技术

综合应用统计分析、预测理论、模式识别、神经网络和专家系统等多项技术，针对德兴铜矿设备状态监测的实际情况。研究设备润滑磨损状态智能分析技术。     

The adenomatoid odontogenic tumor: an analysis of 57 cases in a black African population

PURPOSE: This study analyzed the findings in a large series of adenomatoid odontogenic tumors (AOT) in Nigerians. PATIENTS AND METHODS: Hospital records of all cases of AOT diagnosed at three teaching hospitals were reviewed and analyzed. RESULTS: Most of the tumors were intraosseous (central) (98.3%) and of the follicular type (75%). Females were more frequently affected than males (1.4:1), and patients in their second decade of life were most frequently affected (75%). Patients with follicular AOT were relatively younger (15.2 +/- 5.6 years) than those with extrafollicular tumors (20.9 +/- 13.8 years). However, males who presented with extrafollicular tumors (14.6 +/- 3.9 years) were relatively younger than their female counterparts (24.9 +/- 16 years). The maxilla was affected nearly twice as often as the mandible (1.8:1), and the canine tooth was frequently embedded in the tumor (76.9%). Although follicular tumors were most frequently located in the maxilla (76.3%), extrafollicular tumors were more commonly found in the mandible (69.2%). CONCLUSION: The distribution of this tumor in black Africans does not appear to be substantially different from that reported in caucasians.     

经过优化的用于可再生能源系统的大功率逆变器

可再生能源市场正从全球金融危机中强劲反弹。先前延误或停工的项目已重新启动,许多新项目正在实施。这一高潮有力地掀起了整个供应链对可再生能源系统组件的需求,包括风力发电和光伏逆变器。全球风能理事会（GWEC）预测未来4年总装机容量的年均增长率为20.9%。这将使得到2014年风电总装机容量增加一倍以上,超过400GW。     

软特性650V IGBT：低电磁干扰和电压尖峰的优化器件

近年来,功率半导体厂商致力于提高器件的开关速度,这带来了开关损耗降低和系统能效提升的益处。这些功率器件需要优化的直流电路寄生电感（Ls）。为了满足具有大电流的高功率应用的需求,推出了一种全新的芯片650V IGBT4,旨在提供更大的设计自由度。这款全新的IGBT4器件具备更好的关断软度,并且由于关断电流变化率di／dr...     

改进的开关性能：快速IGBT带来新的挑战

降低动态功耗需要快速地开关功率半导体,但是,快速开关IGBT带来的新挑战,就是对关断电压峰值有特别强烈的影响。关断过程中uce-和ic测量分析说明了直流母线寄生电感和模块电感之间的相互作用。这使得在给定的应用中非常容易分析出的薄弱环节并在模拟中发现最大的潜力。     

核科技报告编写规则

规定了核科技报告编写的基本要求和格式。该规则全部或部分适用于学位论文、学术论文、年报等科技文件,也适用于技术档案。     

Elevated concentrations of circulating adhesion molecules and their association with microvascular complications in insulin-dependent diabetes mellitus

To better understand potential associations of circulating adhesion molecules (cAMs) with diabetic microangiopathy, circulating serum concentrations of intercellular adhesion molecule-1 (cICAM-1), vascular cell adhesion molecule-1 (cVCAM-1), and endothelial leukocyte adhesion molecule-1 (cELAM-1) were determined in patients with insulin-dependent diabetes mellitus (IDDM) (n = 70) presenting with varying degree of metabolic control and status of diabetic late complications, and were compared with age-matched healthy subjects (n = 70) in a cross-sectional study. Concentrations of cICAM-1 and cVCAM-1 were elevated in IDDM vs. age-matched controls (cICAM-1: 276 +/- 71 vs. 212 +/- 57 ng/mL; P < 0.0001; cVCAM-1: 781 +/- 245 vs. 615 +/- 151 ng/mL; P < 0.0001), whereas cELAM-1 did not differ between the groups (cELAM-1: 50 +/- 25 vs. 46 +/- 23 ng/mL, P = 0.31). The levels of cVCAM-1 were more markedly elevated in IDDM patients with diabetic retinopathy (n = 32) than in those without (n = 38) (cVCAM-1: 848 +/- 281 vs. 724 +/- 197 ng/mL, P < 0.05), as well as in patients with micro- or macroalbuminuria (n = 10) vs. those without (n = 60) (cVCAM-1: 947 +/- 256 ng/mL vs. 753 +/- 234 ng/mL, P < 0.05), whereas no difference in cICAM-1 and cELAM-1 was apparent regarding the clinical status of diabetic microangiopathy. No correlations were found between hemoglobin A1e and cAMs in the individual subgroups of patients and healthy subjects. Interestingly, however, low density lipoprotein cholesterol correlated with cVCAM-1 (r = 0.38, P = 0.03) in IDDM patients with diabetic microangiopathy (n = 33), but not in healthy controls or patients without microangiopathy (n = 37). Analyzing the pooled data of diabetic patients and healthy subjects (n = 140), concentrations of cICAM-1 were markedly related to cVCAM-1 (r = 0.45, P < 0.0001) and cELAM-1 (r = 0.31, P < 0.0002), whereas cVCAM-1 was related less to cELAM-1 (r = 0.19, P = 0.03), respectively. We conclude that, irrespective of actual metabolic control, serum concentrations of cICAM-1 and cVCAM-1 but not cELAM-1 are elevated in patients with IDDM, reflecting ongoing endothelial cell stimulation and leukocyte activation. More specifically, more marked elevation of cVCAM-1 may even hint at clinically manifest diabetic microangiopathy.     

The effect of a combined transplant on reparative osteogenesis in experimental defects of the jaw (the late results)

The review deals with the literature data concerned with substances causing an effect on the ion channels of acetylcholine receptors in the skeletal muscles: local anesthetics, inhalation narcotics, postsynaptic muscle relaxants, and other drugs.