Effect of interference on transmission for newly deployed wireless sensor networks

The co-channel interference （collisions） seriously affect the transmission for the newly deployed wireless sensor networks since there is no structure at that phase. In this paper, the interference of the whole network is analyzed based on the SNIR model. The new concept of critical transmitting range is proposed, based on which the transmission theorem is obtained and proved. The results provide the theoretical ground to set up the primary structure of newly deployed networks.     

颈部硬膜外腔注药治疗颈椎病

1985年以来,我们采用颈部硬膜外腔注药,选择性推拿按摩治疗颈椎病30例,其中神经根型14例、椎动脉型5例,脊髓型1例,混合型10例。经一年来随访,27例有效,无效3例(穿刺失败一例)。我们施行颈部硬外腔注入激素和局麻药物,能消炎消肿镇痛、减轻压迫,阻断了恶性循环。加上手法松解软组织挛缩,调整失稳颈椎位置解除压迫症状,因而获得较为满意的效果。     

基于模块化建模的动力装置仿真模型研究

采用模块化建模方法对几种典型的舰船动力装置进行了仿真分析．以新设计的要求最大航速不小于30 kn 8000t级舰船为例，采用基于MATLAB／SIMULlNK软件建立了一种通用非线性的动态仿真模型．在舰体阻力估算时采用ALM方法．仿真结果和试验数据比较表明，建模具有一定要求的仿真精度和较广泛的通用性．     

TRAIL在食道鳞癌及癌旁组织中的表达

目的　研究人肿瘤坏死因子相关凋亡诱导配体 (TNF relatedapoptosisinducingligand ,TRAIL)在食道鳞癌及癌旁组织中的表达及意义。方法　采用免疫组化S -P法 ,检测 42例食道鳞状细胞癌及其癌旁组织中TRAIL蛋白表达水平。结果　TRAIL在正常食道粘膜上皮、单纯增生、不典型增生、鳞癌组织中其阳性表达呈递减趋势 (P <0 .0 1) ;在Ⅰ、Ⅱ级鳞癌明显高于Ⅲ级和未分化鳞癌 (P <0 .0 1)。而在早期鳞癌和晚期鳞癌中的表达无差异 (P >0 .0 5 )。伴有淋巴结转移组和无转移组之间无差异 (P >0 .0 5 )。结论　TRAIL的表达可能与食道鳞癌的发生、发展密切相关 ;与食道鳞癌的分级呈负相关 ;与癌组织浸润深度和淋巴结转移无关。     

人心脏神经节丛的定位和定量及神经连接

为了研究人心脏神经元的构筑，观察了人心脏神经节的分布数量和神经连接。光镜下发现大量神经节（５５０±１４９）或神经元分布在人的心房和心室表面。神经节和神经纤维束形成神经节丛。在左右心房表面，心房神经节丛靠神经纤维束彼此相连；在心室顶侧面心室神经节丛也彼此相连。但是在光镜下未发现心房神经节丛和心室神经节丛之间有神经纤维束相连。这个形态学发现支持把心房神经节丛和心室神经节丛区分为两个相对独立的功能单位的概念。     

Geometrical design of blade＇s surface and boundary control of Navier-Stokes equations

In this article a new principle of geometric design for blade＇s surface of an impeller is provided. This is an optimal control problem for the boundary geometric shape of flow and the control variable is the surface of the blade. We give a minimal functional depending on the geometry of the blade＇s surface and such that the flow＇s loss achieves minimum. The existence of the solution of the optimal control problem is proved and the Euler-Lagrange equations for the surface of the blade are derived. In addition, under a new curvilinear coordinate system, the flow domain between the two blades becomes a fixed hexahedron, and the surface as a mapping from a bounded domain in R2 into R3 , is explicitly appearing in the objective functional. The Navier-Stokes equations, which include the mapping in their coefficients, can be computed by using operator splitting algorithm. Furthermore, derivatives of the solution of Navier- Stokes equations with respect to the mapping satisfy linearized Navier-Stokes equations which can be solved by using operator splitting algorithms too. Hence, a conjugate gradient method can be used to solve the optimal control problem.     

GUSTATORY RESPONSES OF NEURONS IN THE PARABRACHIAL NUCLEUS OF RATS

Ａｎｕｍｂｅｒｏｆａｎａｔｏｍｉｃａｌ,ｅｌｅｃｔｒｏｐｈｙｓｉｏｌｏｇｉｃａｌａｎｄｂｅｈａｖｉｏｒａｌｅｘｐｅｒｉｍｅｎｔｓｈａｖｅｓｈｏｗｎｔｈａｔｇｕｓｔａｔｏｒｙｉｎｆｏｒｍａｔｉｏｎｉｎｔｈｅｎｕｃｌｅｕｓｏｆｔｈｅｓｏｌｉｔａｒｙｔｒａｃｔ(ＮＴＳ) ,ｗｈｉｃｈｉｓｃｏｎｖｅｙｅｄｆｒｏｍｔｏｎｇｕｅｖｉａｔｈｅｃｒａｎｉａｌｎｅｒｖｅｓ (ｆａｃｉａｌ,ｇｌｏｓｓｏｐｈａｒｙｎｇｅａｌ,ａｎｄｖａｇｕｓ) ,ｒｅａｃｈｅｓａｃｏｎｆｉｎｅｄ ｐａｒｔｏｆｔｈｅ ｐａｒａｂｒａｃｈｉａｌｎｕｃ…     

A New Proposal of Inverse-Time Characteristics for Overcurrent Relay Based on Microcomputer

The conventional time function of electromechanical relays is hard to coordinate with other relays．In order to promote the application of inverse-time overcurrent relays，a new time function for microprocessor-type relay is proposed．The setting of the trip time for this relay is performed by determining the shortest trip time and the longest trip time，respectively．The results of analysis show that with the new time function，the inverse-time overcurrent relay is easy to coordinate with other relays and has a comparatively shorter trip time，and that the fault happens in the protective zone．     

Study of the mechanism on the apoptosis induced in Human leukemia cell line K562 by the combination of indole-3-acetic acid and horseradish peroxidase

Objective To investigate the mechanisms of apoptosis induced in Human leukemia cell line K562 by the combination of indole-3-acetic acid and horseradish peroxidase. Methods Human leukemia cell line K562 were exposed to indole-3-acetic acid （IAA） at 20, 40, 60, 80 or 100 mol/L and horseradish peroxidase（HRP） at 1.2 g/mL for varying times. MTT assay was applied to detect the cell proliferation. Flow cytometry was performed to detect the arrest of cell cycle. Terminal deoxynucleotidyl transferase-mediated dUTP nick end labeling （TUNEL） assay was used to measure apoptosis. 2, 7-dichlorofluorescin diacetate （DCFH-DA） uptake was measured to determine free radical by confocal microscope. Content of malondiadehyde （MDA） and activity of superoxide dismutase （SOD） were measured by biochemical methods. Results IAA/HRP initiated growth inhibition of K562 cells in a dose- and time-dependent manner. Flow cytometry revealed that cell cycle arrested at G1/G0 after 24 hours treatment. After 72 hours treatment, apoptotic rate of 100 mol/L IAA group increased to 43.9 %, which was 5 times that of control（P〈0.01）. Content of MDA and activity of SOD increased respectively in treatments compared with control. Meanwhile, IAA/HRP stimulated the formation of free radical, which was increased by IAA concentration-dependently. Conclusion The combination of IAAand HRP can inhibit the growth of Human leukemia cell line K562 in vitro by inducing apoptosis which is associated with the increase of free radical. The combination of IAA and HRP might be a promising chemopreventive and chemotherapeutic agent against human leukemia.     

肋板式结构通道设计

从中岭立交工程通道设计出发,提出对于斜交角大于85°通道采用肋板式结构方案的设计特点。