Primal-Dual Monotone Kernel Regression

This paper considers the estimation of monotone nonlinear regression functions based on Support Vector Machines (SVMs), Least Squares SVMs (LS-SVMs) and other kernel machines. It illustrates how to employ the primal-dual optimization framework characterizing LS-SVMs in order to derive a globally optimal one-stage estimator for monotone regression. As a practical application, this letter considers the smooth estimation of the cumulative distribution functions (cdf), which leads to a kernel regressor that incorporates a Kolmogorov–Smirnoff discrepancy measure, a Tikhonov based regularization scheme and a monotonicity constraint.     

聚碳酸酯快中子反冲径迹的电化学蚀刻研究

我们研制了一台供扩大固体内核径迹用的电化学蚀刻装置。它可以输出电压和频率皆可调的正弦波(电压0—1100伏,频率50—5000赫)。采用聚碳酸酯膜记录快中子引起的反冲核径迹。对径迹蚀刻的几个主要参量如电场强度、频率、蚀刻时间和蚀刻液的浓度等进行了研究,还对聚碳酸酯的中子灵敏度、能量响应、方向响应、径迹稳定性及本底进行了测量。对于180微米厚的聚碳酸酯膜,实验确定的最佳蚀刻条件为:电场强度13.5千伏/厘米,电场交变频率2.5千赫,6N KOH,15℃,5小时。在此条件下,电化学蚀刻的快中子反冲径迹平均直径约为50微米;对~(252)Cf、AmBe、4.0和14.8兆电子伏中子的灵敏度分别是2.7×10~(-7)、1.8×10~(-6)、2.2×10~(-6)和3.7×10~(-6)(径迹/中子);经预蚀刻的本底径迹密度约为8(径迹/厘米~2)。实验表明,固体核径迹探测器电化学蚀刻方法的显著优点是,它能把反冲核径迹放大成清晰可见的放电蚀坑,从而使径迹测量变得相当简单、快速和可靠。     

OLYMPUS a standard control and utility package for initial-value FORTRAN programs

Title of program: OLYMPUS Catalogue number: ABUF Program obtainable from: CPC Program Library, Queen's University of Belfast, N. Ireland (see application form in this issue) Computer: ICL 4–70; Installation: UKAEA Culham Laboratory Operating system: ICL Multijob Programming languages used: STANDARD FORTRAN High speed store required¹: 14464 words; No. of bits in a word: 32 Overlay structure: None No. of magnetic tapes required: None Other peripherals used: Line printer No. of cards in combined program and test deck: 2425 Card punching code: EBCDIC     

EFFECT OF LASER BEAM RADIATION ON FATIGUE CRACK PROPAGATION IN AISI 4150 STEEL

The effect of laser beam radiation on fatigue crack growth in AISI 4150 steel was performed on compact-tension (CT) specimens, in which a composite region (CR) comprised of the hardened zones (HZs) on the top and bottom surfaces and the base metal (BM) in the interior, was aligned either along or normal to the crack growth direction. The microstructure of the HZs consisted of martensite, while lower bainite was present in the 300 °C preheated laser-hardened specimens. When the crack propagated along the laser tracks (LTs), the fatigue crack growth rates (FCGRs) of the laser-hardened specimen were lower than those of the base plate, particularly at low ΔK ranges. On the other hand, for a crack propagating normally to the LTs, decelerated FCGRs in the regions preceding the CR and accelerated FCGRs within the CR itself were found. However, enhanced FCGRs in the CR were not found in preheated specimens with a bainite structure in the HZs as the crack grew normal to the LTs. The enhancement of FCGRs in the CR, which became more accentuated at high ΔK values, was closely related to an embrittled microstructure (martensite) in the HZs.     

一种旨在提高磁盘驱动器道密度的光记录系统结构

在磁盘驱动器中借助光伺服技术可以大幅度提高道密度我们的方法是；采用光刻工艺，在磁盘上记录高精度有磁，无磁伺服图形，通过磁头读取伺服信息。本文设计了用于刻写伺服图形的光记录系统。该系统可以完成６３５０ＴＰＩ磁盘的刻录。     

SEM investigations of etched heavy ion tracks

It is shown that the scanning electron microscope (SEM) is an invaluable tool for the investigation of etched ion tracks, particularly in the submicron range. The SEM makes it possible to measure doses with track detectors two orders of magnitude higher than when they are measured by a light microscope. Furthermore, the SEM is used for investigation of the etched-track cross sections over the full length of the channels. Growing of metal needles in the membranes by microgalvanic deposition allows replication of the form of the etched channels. After the membrane is dissolved, the metal needle replicas instead of the membrane can be investigated. It will be shown that the SEM is an important tool for the investigation of etched heavy ion tracks in solids.     

实时多任务操作系统RTK86的设计

本文叙述实时多任务操作系统ＲＴＫ８６的设计思想及其特点，主要阐述了自底向上、面向硬件的实时内核的设计     

Altering Functional Properties of Fats Using Power Ultrasound

ABSTRACT: Ultrasound has been used for the last 50 y in different processing applications. Depending on the power and frequency of the sound waves, ultrasound techniques can be classified in different categories. Low-intensity ultrasound uses high frequencies in the range of 100 kHz to 10 MHz and is mostly used for therapeutic purpose (frequencies between 1 and 10 MHz) and to passively monitor the characteristics of materials (frequencies between 100 kHz and 10 MHz). High-intensity ultrasound (HIU), on the other hand, uses lower frequencies in the range of 20 to 100 kHz and it is commonly used for cleaning, disrupting, and restructuring materials. The objective of this study is to evaluate the effect of HIU on functional properties of anhydrous milk fat (AMF), palm kernel oil (PKO), and an all-purpose shortening (Sh). Results from this research shows that HIU induced primary and secondary nucleation in the lipid, generating smaller crystals and as a consequence harder materials. HIU affected hardness more efficiently when applied at higher crystallization temperatures (26 and 28 °C) as shown for AMF data, and when the sonication was applied after the first crystals were formed as observed for PKO and Sh systems. In addition to changes in hardness, AMF and Sh networks obtained after sonication were characterized by a steeper and sharper melting profile. This research shows that HIU can be used as an additional processing tool to tailor the functional properties of lipids with the potential to be used in the processing of trans-free shortenings.     

同层排水技术探讨

同层排水技术在国内渐渐兴起,预计将成为排水管道的主流敷设方式.文章介绍同层排水技术的主要形式、设计和施工工艺及存在难题,并进行探讨.     

基于底层的光测仪器时统部件驱动程序的研究

新型光学测量设备中控计算机系统中配备多种专用部件,通过这些专用部件实现对内外的数据通讯和状态控制等功能,其中,时统部件为测控系统提供标准时间信号和标准频率信号。本文在深入探讨了体系结构和系统核心机制的基础上,研究从底层开发光测仪器时统部件实时通讯的程序,根据测试结果表明,可以满足靶场测量检测和定位的需要,并成功应用于新一代的光学测量仪器。