早期胃癌的临床病理特点

观察了192例早期胃癌的临床病理特点，其中粘膜内癌103例,粘膜下癌89例。结果显示，早期胃癌多位于胃窦部（42．71％），以凹陷型为主（67．19％），且多为髓样癌（53．13％），组织类型以分化型管状腺癌及印戒细胞癌为主，分别为41．67％及25．52％。浸润型占比例较低（9．90％），但易引起胃壁淋巴管浸润及淋巴结转移。本组早期胃癌胃壁淋巴管浸润率为30．73％，淋巴结转移率为12．50％。女性发病年龄及出现淋巴结转移的年龄均较男性提前。     

Improved Genetic Algorithm for Job-Shop Scheduling

Introduction Job shopschedulingproblem(JSP)isoneofthe well knownhardestcombinatorialoptimizationprob lems,andmanysolutionsbasedongeneticalgorithms(GAs)havebeenproposedbymanyresearchersso far[13].SincethedemonstrationofapplicationofGA toschedulingproblemsb…     

Radiosensitivity of β-elemene on rabbit VX2 renal transplant carcinoma model

Objective To investigate the effects of low dosage ofβ-elemene on the radiosensitivity of rabbit VX2 renal transplant carcinoma model. Methods We took the rabbit VX2 renal transplant carcinoma as the model. Experimental rabbits were divided into three groups： the control group, the radiation group, and the radiation ＋β-elemene （radiosensitivity） group. The change of tumor was observed by Spiral CT and B ultrasound to compare its regrowth period. The tumor was measured by light microscopy and electron microscopy. Results The tumor in radiosensitivity group was restrained obviously and the sensitization enhancement ratio （SER） of β-elemene was 1.89. Different apoptosis was observed under transmission electron microscopy. Conclusion Low dosage β-elemene can enhance the radiosensitivity of rabbit VX2 renal transplant carcinoma model and induce the apoptosis of tumor cells, but the mechanism needs further study. It promotes apoptosis in mechanisms in vitro.     

加快汽运专业知识更新的步伐

随着汽车运输业的发展，电子技术、新材料、新工艺的应用，使得现代汽车的功能不断完善，性能也在不断地提高。传统的汽车结构，正在由一些性能更好、功能更全的装置或系统所取代。如电子燃油喷射、直接点火系统替代了化油器、分电器，使汽车动力性、可靠性更好；电子排放控制系统使得汽车排污量大大减少，把汽车对环境的影响减少到最低程度；制动防抱系统的应用，大大提高了行驶安全性；     

捷达轿车灯光电路故障分析与排除

1．前大灯故障分析与排除 1）远光灯、近光灯都不亮 故障现象：当车灯开关位于大灯档时,无论变光开关处在远光位还是近光位,远光灯、近光灯都不亮。     

切口混凝土梁断裂能的尺寸效应试验研究

本文通过13组46个三点弯曲切口梁试件的单调和循环加载试验,研究了混凝土断裂能OF的 尺寸效应。结果表明,单调及循环加载试验中测得的混凝土断裂能几乎相等。在试验梁跨度、 高度及截面宽度不变时,随切口相对深度的增加,混凝土断裂能呈线性降低趋势。在试验梁跨 高比l/d二5~8时,混凝土断裂能随跨高比的增加而趋于降低。      

焊后热处理对15MnMoVNXt、HQ80、stE690钢HAz冲击韧性的影响

本文针甘15MnMOVNXt、HQ80、StE690三种钢焊接接头,采用 300~70oeC内不同温度回火,600“C2.5~6。sh不同回火时间,以及 不同冷却方式研究焊后热处理对HAz韧性的影响,为实际生产提供制 定工艺的依据。      

2022年奔驰EQA250行驶中蓄电池报警

<正>车型：2022年奔驰EQA250,配置前轮电机驱动系统（功率140kW）。行驶里程：4460km。VIN:LE49N0CBXNL××××××。故障现象：行驶中蓄电池报警。故障诊断：接车时发现整车没有电,询问得知车是拖过来的,救援现场就发现整车没有电了。连接充电设备,对整车进行充电,充了大概1h,打开点火开关,发现仪表有高压蓄电池报警,如图1所示。     

溶胶-凝胶法制备软磁纳米材料Fe2O3

首次采用添加分散剂溶胶-凝胶法制备软磁纳米材料Fe2O3,采取添加分散剂和改变焙烧方法保证晶粒尺寸.实验结果表明:软磁纳米晶制备中添加分散剂尿素,然后在高温(600℃)焙烧前增加一个低温(400℃)退火阶段,两项措施能保证Fe2O3原始晶粒尺寸在30～40nm.试验操作简单、过程易于控制、产品质量稳定.     

Improved algorithm for distributed localization in wireless sensor networks

Many sensor network applications require location awareness,but it is often too expensive to equip a global positioning system(GPS) receiver for each network node.Hence,localization schemes for sensor networks typically use a small number of seed nodes that know their locations and protocols whereby other nodes estimate their locations from the messages they receive.For the inherent shortcomings of general particle filter(the sequential Monte Carlo method) this paper introduces particle swarm optimization a...