Alterations to the transyt-7F model to represent near-side transit stops

Transit vehicles stopping to load/unload passengers on-line at a signalized intersection can obstruct the flow of other vehicles. The TRANSYT model ignores the delay to other traffic caused by this loading/unloading process. This can cause TRANSYT to use incorrect flow profiles, resulting in signal timings that cater to these profiles rather than the actual ones. This paper describes a new model for representing near-side transit stops in lanes shared by public transit and private vehicles, and its implementation into the TRANSYT-7F program. The results of an initial application of the proposed model are also described. The proposed model, which is a deterministic simulation model, is able to represent the effect of near-side transit stops on the other traffic; this representation covers both total and partial blockage of the approaches during the transit loading. The procedure has been incorporated into the TRANSYT-7F program. This allows appropriate representation of the adverse effects of transit loading on-line during a green phase. It thus encourages the TRANSYT optimizer to push transit loading to the red phases.     

万能钥匙——顶级汽修技师

本文译自美国MOTO杂志,作者介绍了美国的高级维修技师应该具备哪些技能,对国内的同行具有一定的借鉴作用。     

数据流深入解析（下）

本文的上篇是从讨论发动机熄火时‰的OBDII的数据流作为开场序曲的。接下来,我们就要进一步探讨数据流在发动机运转期间的情况。     

快速诊断电路故障的技巧

本文所述的修理方法可以最大限度地利用电路图，并能迅速，准确地找出断路．短路以及有故障的元器件。[编者按]     

Simple algorithms for minimizing the sum of linear shipment costs and convex port costs

Several methods are discussed for minimizing the sum of linear collection/distribution costs from/to a number of zones, and non-linear costs at processing ports. The non-optimality and computational implications of approximating non-linear cost functions for use with the linear programming technique are discussed. A simple graphical technique is presented and two computational algorithms are developed which make use of the special structure of the problem. The algorithms are illustrated using a simple example. Both algorithms converge to global optima. One is more suitable for hand calculation and the other is easier to program, but both are easily programmed and are computationally efficient.     

Latent Supportive Utility of Irrelevant Attributes in Feature Selection

This paper proposed a novel feature selection method LUIFS (latent utility of irrelevant feature selection) that not only selects the relevant features, but also targets at discovering the latent useful irrelevant attributes by measuring their supportive importance to other attributes. The method minimizes the information lost and simultaneously maximizes the final classification accuracy. The classification error rates of the LUIFS method on 16 real-life datasets from UCI machine learning repository were evaluated using the ID3, Nave-Bayes, and IB (instance-based classifier) learning algorithms, respectively; and compared with those of the same algorithms with no feature selection (NoFS), feature subset selection (FSS), and correlation-based feature selection (CFS). The empirical results demonstrate that the LUIFS can improve the performance of learning algorithms by taking the latent relevance for irrelevant attributes into consideration, and hence including those potentially important attributes into the optimal feature subset for classification.     

数据流深入解析（上）

由于发动机故障导致指示灯被点亮,在对这类问题进行诊断时,一定要在熄灭指示灯前读取和记录冻结数据。因为一旦清除了故障代码,再想读取和记录就太迟了．冻结数据将会丢失。     

解读车轮轴承

像当今汽车上许多零部件一样,车轮轴承已变得越来越可靠,以至于在没有出现故障前我们往往会忽视它。然而,了解故障原因,即使是老化的原因,对我们来说都是有意义的。     

最安静的兰博基尼

<正>这款由兰博基尼推出的混合动力超级跑车既可以拥有669kW的恐怖输出,还可以以纯电动模式悄无声息地行驶在之前结束的巴黎车展上兰博基尼终于推出了一款与"3大"(保时捷918、迈凯伦P1、法拉利Laferrari)抗衡的插电式混合动力超级概念车。虽然这款车型的具体量产计划暂时还未知,但是其账面上的数据表现已经让我为之震惊。Asterion LPI 910-4采用了一台5.2L V10自然吸气发动机,配合3台电动机,总功率达到了惊人的669kW(910PS)。如此暴躁的动力输出使其0~100km/h加速只     

如何卖出一辆特斯拉？关于特斯拉，你所不知道的秘密

特斯拉的销售是最幸福的,因为只要是T粉（前提需要有足够的钱）不用你介绍他都会买的。特斯拉的销售是最悲惨的,因为世上还有很多人不知道特斯拉。