《振动与冲击》征稿简则

《振动与冲击》是中国振动工程学会、上海交通大学、上海市振动工程学会联合主办的反映和交流我国力学、航空、航天、造船、车辆、机械、土木建筑、水利、电力、矿山、化工、冶金、仪器仪表、海洋工程、轻工、环境保护等领域的振动、冲击和噪声方面的成果及经验的综合性学术刊物。     

综合性的高新技术标准——《机械振动、冲击与状态监测国家标准汇编》

机械振动与冲击是一项覆盖面很广的共性基础技术,它涉及到机械装备、仪器仪表、能源电力、船舶车辆、交通运输、航空航天、土木结构、冶金矿山、水利工程、道路桥梁、地质勘探、农林机械、电子电工、劳动保护、环境保护、公共安全、医药卫生等领域,几乎与国民经济的各个部门、社会生活的方方面面都有密切的关系。     

《振动与冲击》征稿简则

<正>《振动与冲击》是中国振动工程学会、上海交通大学、上海市振动工程学会联合主办的反映和交流我国力学、航空、航天、造船、车辆、机械、土木建筑、水利、电力、矿山、化工、冶金、仪器仪表、海洋工程、轻工、环境保护等领域的振动、冲击和噪声方面的成果及经验的综合性学术刊物。本刊为国家科委中国科技论文统计源期刊、《中国核心期     

《振动与冲击》征稿简则

《振动与冲击》是中国振动工程学会、上海交通大学、上海市振动工程学会联合主办的反映和交流我国力学、航空、航天、造船、车辆、机械、土木建筑、水利、电力、矿山、化工、冶金、仪器仪表、海洋工程、轻工、环境保护等领域的振动、冲击和噪声方面的成果及经验的综合性学术刊物。本刊为国家科委中国科技论文统计源期刊、《中国核心期     

《振动与冲击》征稿简则

《振动与冲击》是中国振动工程学会、上海交通大学、上海市振动工程学会联合主办的反映和交流我国力学、航空、航天、造船、车辆、机械、土木建筑、水利、电力、矿山、化工、冶金、仪器仪表、海洋工程、轻工、环境保护等领域的振动、冲击和噪声方面的成果及经验的综合性学术刊物.     

中国少数民族乐器介绍之八——西南地区少数民族乐器葫芦笙和巴乌

中国长期以来就是一个统一的多民族国家，少数民族人口有几千万。中国西南部的云贵高原和广西壮族自治区是少数民旗聚住最集中的地区，那里居住着苗、彝、壮、藏、布依、侗、瑶、白、佬、怒、佤、哈尼、傣、僳僳、拉祜、纳西、景颇、苦聪、独龙、     

《振动与冲击》征稿简则

《振动与冲击》是中国振动工程学会、上海交通大学、上海市振动工程学会联合主办的反映和交流我国力学、航空、航天、造船、车辆、机械、土木建筑、水利、电力、矿山、化工、冶金、仪器仪表、海洋工程、轻工、环境保护等领域的振动、冲击和噪声方面的成果及经验的综合性学术刊物。本刊为国家科委中国科技论文统计源期刊、《中国核心期     

《振动与冲击》征稿简则

《振动与冲击》是中国振动工程学会、上海交通大学、上海市振动工程学会联合主办的反映和交流我国力学、航空、航天、造船、车辆、机械、土木建筑、水利、电力、矿山、化工、冶金、仪器仪表、海洋工程、轻工、环境保护等领域的振动、冲击和噪声方面的成果及经验的综合性学术刊物。本刊为国家科委中国科技论文统计源期刊、《中国核心期     

《振动与冲击》征稿简则

<正>《振动与冲击》是中国振动工程学会、上海交通大学、上海市振动工程学会联合主办的反映和交流我国力学、航空、航天、造船、车辆、机械、土木建筑、水利、电力、矿山、化工、冶金、仪器仪表、海洋工程、轻工、环境保护等领域的振动、冲击和噪声方面的成果及经验的综合性学术刊物。本刊为国家科委中国科技论文统计源期刊、《中国核心期     

《振动与冲击》征稿简则

正《振动与冲击》是中国振动工程学会、上海交通大学、上海市振动工程学会联合主办的反映和交流我国力学、航空、航天、造船、车辆、机械、土木建筑、水利、电力、矿山、化工、冶金、仪器仪表、海洋工程、轻工、环境保护等领域的振动、冲击和噪声方面的成果及经验的综合性学术刊物。本刊为国家科委中国科技论文统计源期刊、《中国核心期刊要目总览》核心期刊,《中国知识资源总库中国科技期刊精品数据库》、《中国科学引文数据库》、《中国物理学文     

Patent information of the former USSR countries

The patent information currently available for the former USSR, EAPO, Russian Federation, Turkmenistan, Belarus, Tajikistan, Kazakhstan, Azerbaijan, Moldova, Armenia, Ukraine, Georgia, Kyrgyzstan, the Baltic countries and Uzbekistan is described. It is a complicated scene, in terms of the extent and depth of coverage, the media employed (paper, CD, on-line), and the use of open access, charged INTERNET access and commercial databases.     

Survey of Experimental Data of Thermophysical Properties for Difluoromethane (HFC-32)

A survey of experimental data for HFC-32 was prepared at the Institute of Thermomechanics in connection with planned experiments. In tabular form, surveys of thermodynamic, transport, and other property measurements, including pvT behavior, second virial coefficient, vapor pressure, saturation densities, critical parameters, heat capacities, speed of sound, thermal conductivity, viscosity, surface tension, refractive index, dielectric constant, and dipole moment, are presented. Tables include author)s) name(s), reference, year of publication, ranges of measurements, number of points, stated uncertainty, sample purity, and experimental method.     

高强度高模量玻璃纤维特性与应用

与传统E玻璃纤维相比,高强度高模量玻璃纤维在拉伸强度、弹性模量、抗冲击性能、耐高温性能、耐腐蚀性能、电绝缘性和介电性能等方面都具有明显优势,可广泛地应用于航空航天、国防军事、风力发电、交通运输、体育休闲、压力容器、建筑工程、管道、环境处理、石油、机械等许多领域,成为本行业研究与开发的热点和重点.     

Age and pedestrian injury severity in motor-vehicle crashes: a heteroskedastic logit analysis

This research explores the injury severity of pedestrians in motor-vehicle crashes. It is hypothesized that the variance of unobserved pedestrian characteristics increases with age. In response, a heteroskedastic generalized extreme value model is used. The analysis links explanatory factors with four injury outcomes: fatal, incapacitating, non-incapacitating, and possible or no injury. Police-reported crash data between 1997 and 2000 from North Carolina, USA, are used. The results show that pedestrian age induces heteroskedasticity which affects the probability of fatal injury. The effect grows more pronounced with increasing age past 65. The heteroskedastic model provides a better fit than the multinomial logit model. Notable factors increasing the probability of fatal pedestrian injury: increasing pedestrian age, male driver, intoxicated driver (2.7 times greater probability of fatality), traffic sign, commercial area, darkness with or without streetlights (2-4 times greater probability of fatality), sport-utility vehicle, truck, freeway, two-way divided roadway, speeding-involved, off roadway, motorist turning or backing, both driver and pedestrian at fault, and pedestrian only at fault. Conversely, the probability of a fatal injury decreased: with increasing driver age, during the PM traffic peak, with traffic signal control, in inclement weather, on a curved roadway, at a crosswalk, and when walking along roadway.     

Thermophysical properties of some key solids: An update

In 1985, the CODATA Bulletin published a Report of its Task Group on Thermophysical Properties of Solids which analyzed available data on, and gave recommended values for, the heat capacity of Cu, Fe, W, and Al₂O₃, the thermal expansion of Cu, Si, W, and Al₂O₃, the electrical resistivity of Cu, Fe, Pt, and W, the thermal conductivity of Al, Cu, Fe, and W, and the absolute thermopower of Pb, Cu, Pt, and W. The analysts for the different properties were R. B. Castanet, S. J. Collocott, P. D. Desai, C. Y. Ho, J. G. Hust, R. B. Roberts, C. A. Swenson, and G. K. White. The present paper is an updated version of the earlier report and includes more recent data which change some of the recommended values. notably the heat capacity of Cu and W and the thermal expansion of Si and W.     

The 21st century strategic plan: USPTO’s adjustment to the future

The USPTO’s 21st century strategic plan represents a fundamental reappraisal of the tasks, responsibilities, working practices and priorities of the office. It has gone through several versions in seeking the most effective and acceptable way forward. In this article the author reviews the key factors, opinions and changes at each stage of the plan’s development, primarily from the patent perspective. In doing so, he refers to patent pendency and related timeliness issues, such as staffing, productivity, and potential outsourcing of search, classification, reclassification and examination functions. Quality initiatives, such as search tool enhancements, review by second examiner and e-government, are also described, as are wider issues affecting the plan, such as fee diversion, government outsourcing, and globalization issues such as trilateral efforts to share workloads. In concluding, the author points out that, although not fully finalised, the strategic plan is now largely agreed in a form that meets the key requirements for quicker processing, better quality and a rapid move towards e-government, within realistic fee increases, without concomitant massive staff increases, and in stages, with each stage being preceded by firm proof of concept procedures.     

Hybrid features-enabled dragon deep belief neural network for activity recognition

Activity recognition is a challenging task in computer vision that finds widespread applications in various fields, such as motion capture, video retrieval, security, and video surveillance. The objective of this work is to present a technique for recognizing human activities in videos using Dragon Deep Belief Network (DDBN) and hybrid features, which comprises of features like shape, coverage factor, and Space-Time Interest (STI) points. Initially, the keyframes from the input video sequence are extracted using Structural Similarity (SSIM) measure. Then, the features, such as shape, coverage factor, and STI points, are extracted from the keyframes. Based on the feature vector extracted, the proposed DDBN classifier, which is designed by the effective combination of DBN and Dragonfly Algorithm (DA), a classification on human activities, such as walk, bend, etc. in videos. In DDBN, the weights in the network are selected optimally using DA. The weight update using the DA for each incoming feature improves the performance of the DDBN classifier. Further it improves the accuracy in classification of actions. The proposed DDBN classifier is experimented using KTH and Weizmann datasets based on three evaluation parameters, such as accuracy, sensitivity, and specificity. From the performance evaluation, the proposed DDBN classifier could attain better performance with the probability of 98.5% accuracy, 0.96 sensitivity, and 0.959 specificity, respectively.     

多波束测深系统多子阵检测法的改进及其性能分析

多波束测深系统中,相位检测法是实现超宽覆盖测量的关键技术之一。分析了分裂子阵相位检测法和多子阵检测法,并基于对子阵结构的分析,改进了多子阵检测法,给出了多子阵检测法输出信噪比的表达式,讨论了子阵结构对输出信噪比的影响,在理论分析基础上选择了三种子阵结构对海上试验数据进行了处理,验证了分析结果。处理结果表明,在优化参数基础上,多子阵检测法不但可实现多波束测深系统的超宽覆盖,而且可改善系统对海底的检测性能。     

材料医学和医学材料

临床医学和生物材料的蓬勃发展, 促进了多种疾病的诊断成像、有效治疗和精准诊疗。材料与医学交叉学科(简称“材料医学”)的发展旨在克服传统临床医学面临的主要障碍和挑战, 如系统性毒性、生物利用度差、靶向部位特异性低、诊断/治疗效果不理想等。本文系统地阐述了近年来各种医学材料在疾病诊断、治疗和诊疗方面的应用进展, 特别是纳米医学材料的研究进展。首先, 重点讨论癌症治疗领域的生物医学成像(如光学成像、磁共振成像、超声成像、计算机断层成像等)和治疗策略(如光热治疗、动力学治疗、免疫治疗、协同治疗等)。此外, 我们还重点介绍了医学材料对骨组织工程、呼吸系统、中枢神经系统等疾病的诊断和治疗的最新进展, 并重点阐述了用于生物传感和抗微生物等其他代表性生物医学领域的医学材料。最后, 我们讨论了这些独特的医学材料在实际临床转化和应用中所面临的挑战和未来的机遇, 以促进其早日实现临床转化, 推动医学进步和造福患者。     

An Approach to Calculate Thermodynamic Properties of Mixtures Including Propane, <Emphasis Type="Italic">n</Emphasis>-Butane,and Isobutane

This paper discusses a mathematical model for computing the thermodynamic properties of propane, n-butane, isobutane, and their mixtures, in the fluid phase using a method based upon statistical chain theory. The constants necessary for computations such as the characteristic temperatures of rotation, electronic state, etc. and the moments of inertia are obtained analytically applying a knowledge of the atomic structure of the molecule. The paper presents a procedure for calculating thermodynamic properties such as pressure, speed of sound, the Joule-Thomson coefficient, compressibility, enthalpy, and thermal expansion coefficient. This paper will discuss, for the first time, the application of statistical chain theory for accurate properties of binary and ternary mixtures including propane, n-butane, and isobutane, in their entire fluid phases. To calculate the thermodynamic properties of Lennard-Jones chains, the Liu-Li-Lu model has been used. The thermodynamic properties of the hydrocarbon mixtures are obtained using the one-fluid theory. Paper presented at the Fifteenth Symposium on Theremophysical Properties, June 22–27, 2003, Boulder, Colorado, U.S.A.