Effect of different types of feeding on the lipid metabolism of infants in the 1st months of life with acute digestive disorders

A total of 147 sick children from 2 weeks to 6 months of age and 40 healthy children were examined. The children suffering from acute digestive disorders showed, in the presence of formula feeding, deep changes on the lipidogram at the height of the disease. The lipidogram does not return to normal even by the time of clinical recovery. With natural and mixed feeding the metabolic changes are less pronounced, all test parameters reaching normal by the time of convalescence. Intensive therapy does not exert any material effect on the body weight recovery in children with a low lipid level in the blood serum. Parenteral and enteral applications of fat emulsions favoured rapid recovery of these children.     

空间域微分法及其在三维地震资料解释中的应用

对地震信号在空间域求ｎ阶导数，相当于用一个波数特性为的滤波器对信号进行滤波。该滤波器的振幅特性与波数ｋ的ｎ次幂成正比。尽管该方法不能提高地震信号的横向分辨率，但其高通滤波特性将有助于识别地下质异常体的高波数信息。     

印刷滚体非牛顿流体弹流动压性能的有限元分析

印刷滚体间的接触是一个带有共性的主要技术问题,对于非牛顿性质的流体,本文介绍了一种研究这种软层接触问题的分析模型。应用加辽金加权残留方法和虚功原理分别得到了关于压力和变形的控制方程。用有限元方法求得了问题的数值解,与测试数据相比较,结果具有一定的一致性。     

语音转接控制系统的电磁兼容性设计

本文简要介绍了在电子设备中,针对形成电磁干扰EMI的三要素,所采取的提高设备电磁兼容性EMC的措施.     

实时全息干涉计量用于研究岩石材料正向受压形变

采用实时全息干涉计量摄影系统，记录岩石试件正向受压下干涉条纹的形变规律。配合声发射定位测量，可以测定岩石试件微裂纹扩展时间、位置和强度。初步的实验已经观察到干涉条纹是在空间定域的，微裂纹的扩展与局部应力的集中有关，且其延伸方向是应力场高梯度变化的方向等，这种方法的成功将为脆性材料的损伤研究提供一种可视化的研究手段。     

用遗传算法求解基于高阶累积量的盲均衡问题

将遗传算法引入盲均衡技术领域，详细分析了如何用遗传算法求解基于高阶累积量盲均衡问题，并给出了一种求解算法的具体步骤。该算法不用基于领域知识的规则，具有很强的通用性与鲁棒性。通过计算机仿真验证了该算法的有效性。     

应对道路石油沥青技术要求新规范

通过对代表性的国产和进口沥青性质分析,考察国产和进口重交通道路石油沥青、瞢通道路石油沥青对交通部新修订《道路石油沥青技术要求》规范的适应性。结果表明:绝大部分重交沥青产品在针入度指数(PI)指标不能满足新修订规范中A、B级沥青的技术要求,大部分重交沥青产品TFOT后针入度比指标不能满足交通部《道路石油沥青技术要求》规范中A、B级沥青的技术要求,部分重交沥青产品在60℃粘度和TFOT后10℃延度指标不能满足规范中的技术要求。部分普通道路沥青在15℃延度、TFOT后针入度比和TFOT后15℃延度指标上不能满足规范中C级沥青的技术要求。     

新型液-液分离设备——斜板沉降器

介绍了斜板沉降器的结构和操作特性，并对液滴在斜板层膜上的聚结过程以及影响液滴聚结的因素进行了分析；提出了液滴在斜板上有效聚结作为斜板沉降器的设计依据，最后对斜板沉降器的进一步研究重点提出了建议。     

A 13-bit resolution ROM-less direct digital frequency synthesizer based on a trigonometric quadruple angle formula

A ROM-less direct digital frequency synthesizer employing trigonometric quadruple angle formula is present in this paper. The worse case spectral purity is better than -130 dBc. The amplitude resolution is up to 13 bits, while the phase resolution is 12 bits. Neither any scaling table nor error correction tables are required. The maximum error is mathematically analyzed. The word length of each multiplier is carefully selected in the digital implementation such that the error range is circumscribed and the resolution is preserved.     

Identification of Nck family genes, chromosomal localization, expression, and signaling specificity

Already a dozen molecules share binding to the Src homology (SH) 3 domains of human Nck, an SH3-SH3-SH3-SH2 adapter protein. We reason that there may be multiple gene members of Nck to accommodate the large binding repertoires. Here we report identification of novel human and mouse Nck genes and rename them as the Nckalpha and Nckbeta genes (including the human Nckalpha, human Nckbeta, mouse Nckalpha, and mouse Nckbeta genes). Nckalpha and Nckbeta share 68% amino acid identity, whereas the two Nckalpha and two Nckbeta across the species show 96% identity to each other. The human Nckbeta gene is mapped to 2q12, whereas the human Nckalpha gene has previously been mapped at 3q21. Antibodies specifically against Nckalpha and Nckbeta detect Nckalpha and Nckbeta with an identical molecular mass in the same cells of various origins. Ectopically expressed Nckbeta, but not its SH2 domain mutant, strongly inhibits epidermal growth factor- and platelet-derived growth factor-stimulated DNA synthesis. Consistently, epidermal growth factor receptor and platelet-derived growth factor receptor preferentially interact with Nckbeta over Nckalpha in vitro. This study indicates that Nck is a multiple gene family and that each gene may have its own signaling specificity. Because previous anti-Nck (human Nckalpha) antibodies cross-react with Nckbeta, reassessment of those studies with specific Nck genes would be necessary.