连续梁的简便计算

利用三转角方程，对连续梁的内力进行精确的计算，该方法简捷明了，便于应用。     

长距离钢带传动的张紧机构设计与应用

比较了几种长距离传动方式的特点与适用场合，重点探讨了实现长距离精密传动的技术要点。结合实际工程，完成了长距离钢带精密传动的应用，并指出张紧机构的设计与应用是钢带实现长距离精密传动的关键。为此文中对钢带传动的典型张紧机构进行了比较，并分析了这几类张紧机构的应用情况，有参考和应用价值。     

Real-time accurate hand path tracking and joint trajectory planning for industrial robots (I)

Previously, researchers raised the accuracy for a robot’s hand to track a specified path in Cartesian space mainly through increasing the number of knots on the path and the number of the path’s segments, which results in the heavier online computational burden for the robot controller. Aiming at overcoming this drawback, the authors propose a new kind of real-time accurate hand path tracking and joint trajectory planning method. Through selecting some extra knots on the specified hand path by a certain rule and introducing a sinusoidal function to the joint displacement equation of each segment, this method can greatly raise the path tracking accuracy of robot’s hand and does not change the number of the path’s segments. It also does not increase markedly the computational burden of robot controller. The result of simulation indicates that this method is very effective, and has important value in increasing the application of industrial robots. Foundation item: Foundation of the Robotics Laboratory, Chinese Academy of Sciences (No. RL200002) Biography of the first author: TAN Guan-zheng, Dr., professor, born in Oct. 1962, majoring in artificial intelligence, robotics and automation.     

浅论科技英语汉译时对专业术语的模糊翻译技巧

科技术语的翻译历来是令许多科技译者头痛而又不得不面对的问题。本文从一个新的视角基于操作层面来探讨英语专业术语的翻译问题，即译者在专业知识缺失而且又得不到其他技术支撑的情况下，如何最大限度地发挥主观能动性做出相对准确的翻译。     

基于启发式规则优化的网页元素提取方法

网页信息提取方法中的启发式规则,是识别网页标签信息、利用网页节点分析结果、针对网页不同内容、完成信息提取的重要手段。本研究在对现有启发式规则进行研究分析的基础上,提出了几种优化的启发式规则,实现对网页标题、发布时间、来源以及正文内容等元素信息的精准提取。本研究进一步提出了运用编辑距离算法实现正文内容提取准确率的判定,并提出阙值优化方法,克服了正文提取中噪声节点多、内容识别不完全的缺陷,大大提高了提取的准确度。     

激光测速仪在宽厚板轧机后测长的运用

随着国内厚板产量的增加,其市场竞争日趋激烈。为了更好的谋求发展,莱钢宽厚板厂在降低生产成本的同时,通过技术改造极大地提高产品的质量。因为板坯成材规格需要精确的长度数据,所以宽厚板板坯长度的精确测量就显得非常重要。本文主要介绍激光测速仪在轧机后测长系统中的应用。     

基于负荷特征传导的配电台区全状态精准感知与数字化应用

针对低压配电网存在的状态感知水平较低、数据共享挖掘不足等典型问题,结合能源互联网示范台区项目建设内容,以能源互联网的建设理念进行"信息支撑"和"价值创造"2方面的技术突破和应用.首先利用用户负荷特征和故障特征在低压电网中的纵、横向传导特性,构建台区的变、线、户、相位、电气阻抗完整拓扑信息,极大简化采集架构,完成台区全状态精准感知,实现宽带高速电力线载波在信息感知上的高效利用;同时提出数字化业务支撑能力框架,以数据为驱动,探索能源互联网示范台区在电网数字化管理、用户数字化服务和政府数字化治理3个方面的典型业务场景;通过南京的11个小区完成示范应用,拓扑识别准确率可达100％,阻抗计算准确率大于90％,同时试点的603户完成了数据挖掘共享.     

Polymorphisms in EGFR Gene Predict Clinical Outcome in Unresectable Non-Small Cell Lung Cancer Treated with Radiotherapy and Platinum-Based Chemoradiotherapy

For non-small cell lung cancer (NSCLC), radiotherapy (RT) and platinum-based chemotherapy (CHT) are among the main treatment options. On the other hand, radioresistance and cytotoxic drug resistance are common causes of failure. The epidermal growth factor receptor (EGFR) plays an important role in radioresponse and therapy resistance. We hypothesized that single nucleotide polymorphisms (SNPs) in the EGFR gene might affect individual sensitivity to these treatments, and thus, therapy outcome and prognosis. The association between functional EGFR SNPs and overall (OS), locoregional recurrence-free (LFRS), and metastasis-free (MFS) survival was examined in 436 patients with unresectable NSCLC receiving RT and platinum-based CHTRT. In a multivariate analysis, the rs712830 CC homozygotes showed reduced OS in the whole group (p = 0.039) and in the curative treatment subset (p = 0.047). The rs712829 TT genotype was strongly associated with decreased LRFS (p = 0.006), and the T-C haplotype was a risk factor for locoregional recurrence in our patients (p = 0.003). The rs2227983 GG alone and in combination with rs712829 T was an indicator of unfavorable LRFS (p = 0.028 and 0.002, respectively). Moreover, significant independent effects of these SNPs on OS, LRFS, and MFS were observed. Our results demonstrate that inherited EGFR gene variants may predict clinical outcomes in NSCLC treated with DNA damage-inducing therapy.     

火电机组一次调频功率响应特性精细化建模

由于火电机组的功率响应具有较强的非线性特性,常规线性模型难以精确反映机组实际的一次调频响应特性。通过分析汽轮机阀门流量特性、主汽压力等关键因素对机组一次调频功率响应特性影响,引入阀门流量特性和主汽压力耦合函数、主汽压力模型和调节级压力-负荷动态转换系数,在典型汽轮机模型基础上构建火电机组一次调频功率响应特性精细化模型。结合某660 MW超临界机组的一次调频试验对所建立模型的性能进行验证。结果表明,与常规模型相比,新模型能够更好地反映实际机组的一次调频功率响应特性。     

双波长分光光度法测定自来水中Fe2+和Fe3+的含量

采用双波长分光光度法测定 Fe2 和 Fe3 的方法 ,结果表明 ,在 λ1 =4 0 0 nm,λ2 =5 4 2 nm处 ,显色时间在 6 0 min～ 80 min,p H =4～ 5时能联合测定水中 Fe2 和 Fe3 ,其结果具有较高的精密度和准确度。