自承自托直跨式越障输电线路放线系统的研发

随着电能需求增长、城市布局变化、交通路径繁杂等现代社会的发展,线路走廊布局、布设及建设困难重重。高压输电线路跨越高铁、高速、河道、既成线路等障碍并需要相关部门配合的施工工作随处可见。跨越施工占地大、民事多,也为施工带来诸多困难。现有的张力放线、跨越架放线对上述问题均不能有效避让,该两项技术也已使用长久,对线路跨越的多重困难亦不能有效应对。自承自托直跨式放线系统直接在跨越档悬空建设自承自托过线廊道,作业面被限制在跨越档杆塔之间及线路许可弧垂点以上,避开所有障碍点,自行建设,无须协调及配合。安全、高效、快捷、自主完成敷线跨越工作。

泄洪荷载作用下直跨管道受力性能分析

采用ABAQUS软件建立考虑河流泄洪荷载、管道自重、管内介质压力、温度荷载以及地震荷载的直跨管道有限元模型,采用三维等效刚度的土弹簧模型模拟管土相互作用,以水流压力方式加载河流泄洪载荷。针对直跨管道受到的不同荷载组合形式,研究分析了三个工况下直跨管道的受力性能和变形特征。最后,基于油气输送管道跨越工程设计规范,有效判断不同工况下直跨管道的强度和稳定性是否满足规范标准。

跨越三峡、葛洲坝两坝枢纽水运新通道线路方案初步设想

三峡大坝过闸货运能力已达极限,随着长江上游腹地社会经济的高速发展,过闸需求持续提升,三峡枢纽通过能力饱和,挖潜幅度不大使得新通道的建设研究提上了议事日程。近年来,各科研单位主要以三峡和葛洲坝分别进行扩能的线路方案为主,本文将初步探讨直接跨越三峡、葛洲坝两坝枢纽的新通道线路方案,分析解决存在问题的可行性。通过对直跨方案与现有设施扩能方案综合比较,在不考虑经济因素下,将直跨方案作为新通道建设方案选项进行深入研究论证。

国家速滑馆智慧场馆设计探讨

基于奥运竞赛场馆的可靠性、稳定性需求,分析国家速滑馆超大室内空间、1.2万m^(2)冰面的特殊工艺需求;研究常规智能化系统在冬奥场馆的配置特点;响应“科技冬奥”的号召,针对国家速滑馆建筑特点及复杂机电系统的运行难度,提出具体解决方案;探讨智慧场馆在冬奥场馆的应用场景以及后奥运时代场馆全生命周期的运维管理要求。

A Linear CMOS OTA and Its Application to a 3.3V 20 MHz High-Q g_m-C Bandpass Filter

A design of a linear and fully-balanced operational transconductanee amplifier （OTA） with improved high DC gain and wide bandwidth is presented. Derivative from a single common-source field effect transistor （FET） cas- cade and its DC I-V characteristics,the third-order coefficient g3 hasbeen well compensated with a parallel FET operated in the triode region, which has even-odd symmetries between the boundary of the saturation and triode region. Therefore,for high linearity,a simple solution is obtained to increase input signal amplitude in saturation for the application of OTA continuous-time filters. A negative resistance load （NRL） technique is used for the compensation of parasitic output resistance and an achievement of a high DC-gain of the OTA circuits without extra internal nodes. Additionally, derivations from the ideal -90° phase of the gm-C integrator mainly due to a finite DC gain and parasitic poles will be avoided in the frequency range of interest. HSPICE simulation shows that the total harmonic distortion at 1Vp-p is less than 1% from a single 3.3V supply. As an application of the VHF CMOS OTA,a second-order OTA-C bandpass filter is fabricated using a 0. 18μm CMOS process with two kinds of gate-oxide layers, which has achieved a center frequency of 20MHz,a 3dB-bandwidth of 180kHz,and a quality factor of 110.

Chinese companies＇ outward internationalization to emerging countries： The case of Latin America

This paper aims to review and analyze the literature on the expansion of Chinese firms to Latin America. In order to achieve this objective, it first reviews the literature on the internationalization of Chinese MNCs, the theoretical frameworks discussed in the literature and the principal features of companies from China. Second, it describes the economic and political relations between the countries, specifically the threats and opportunities for Latin America and the trade and investment trends. The review shows that the majority of the current literature on Chinese MNCs has a focus on their expansion to developed countries, on the conceptual framework needed to understand this expansion, and on the competition for foreign investments from developed countries. As a result, the analysis makes evident that research gaps seem to exist in the following areas： （1） the relative value of Chinese companies＇ existing advantages, （2） the sustainability of these advantages once the lead, probably given by OEMs or JVs, had been exhausted, （3） research works based on quantitative and comparative data, （4） the motives for FDI, （5） the entry mode, configuration, control and strategy of Chinese companies investing in Latin America, and （6） the potential opportunities presented to European companies operating in Latin America.

A Discussion on Fault Activity Based on Cross-fault Observations in the Capital Circle Region of China and Its Relationship with Earthquakes

In this paper, we made a systematic study on more than 40 years of observational data of ten temporary fault-crossing measurement sites in the capital circle region of China. We calculated horizontal and vertical components of fault slip, and horizontal extension or compression components. Considering the tectonic characteristics of the capital circle region and regional seismicity, we analyzed the present fault activity of the capital circle region and the relationship with earthquakes. The results show the complexity of fault activity in the region： the level of activity of all faults is low, most faults are left-lateral strike-slip faults; there is less vertical activity than horizontal activity and crustal movement is controlled by horizontal movement; fault activity and earthquake activity have a certain relationship, regional fault activity increases before an earthquake, and fault activity has certain abnormal features before strong earthquakes.

Modus operandi of transnational transfer pricing for window dressing

A goal of transfer pricing may be to maximize after tax revenue by setting transfer prices that reduce the total tax paid. ＂Transfer pricing＂ is the pricing of products or services provided by one division to other division of the same corporate entity. Most of the corporate entities are using the method of ＂Window dressing＂, which is a technique used in preparation of financial statements of corporate entities. A transnational corporation is any enterprise that undertakes Foreign Direct Investment （FDI）, owns or controls income gathering assets in more than one country, produces goods or services outsides its country of origin, or engages in international production. Profitability of the transnational corporate entities is being manipulated by the technique of transfer pricing. Abuse of transfer prices is a key tool used by the corporate entities to think that they have virtually no profit; hence, they shouldn＇t pay any taxes. India needs to realize the fundamental need for co-operation among tax administrations in order to remove the obstacles that international double taxation presents to the free movement of goods, services and capital between various countries. In this context, one needs to consider that transactions among associated enterprises may take place under different conditions from those taking place among independent enterprises, while enforcing the act of transfer price mechanism. This paper focuses on transfer pricing and its implications in transnational transactions.

Damage alarming of long-span suspension bridge based on GPS-RTK monitoring

Structure damage identification and alarming of long-span bridge were conducted with three-dimensional dynamic displacement data collected by GPS subsystem of health monitoring system on Runyang Suspension Bridge.First,the effects of temperature on the main girder spatial position coordinates were analyzed from the transverse,longitudinal and vertical directions of bridge,and the correlation regression models were built between temperature and the position coordinates of main girder in the longitudinal and vertical directions;then the alarming indices of coordinate residuals were conducted,and the mean-value control chart was applied to making statistical pattern identification for abnormal changes of girder dynamic coordinates;and finally,the structural damage alarming method of main girder was established.Analysis results show that temperature has remarkable correlation with position coordinates in the longitudinal and vertical directions of bridge,and has weak correlation with the transverse coordinates.The 3%abnormal change of the longitudinal coordinates and 5%abnormal change of the vertical ones caused by structural damage are respectively identified by the mean-value control chart method based on GPS dynamic monitoring data and hence the structural abnormalities state identification and damage alarming for main girder of long-span suspension bridge can be realized in multiple directions.

Integrating biomechanical and motor control principles in elite high jumpers： A transdisciplinary approach to enhancing sport performance

Background： In recent years, there has been a proliferation of technology and sport science utilized within an athlete＇s training, especially at the elite level. However, the sport science is a broad field, encompassing disciplines such as biomechanics, motor control and learning, exercise physiology, sports medicine, sport psychology to name a few. Rarely are these disciplines applied in an integrated manner. The purpose of this study was to document the effectiveness of an integrated biomechanics and motor control protocol for improving athlete＇s performance in the high jump. Methods： Four elite high jumpers performed baseline jumps under no^mal conditions and then jumps using a specific external focus of attention cue designed to improve their running posture. Three-dimensional biomeehanical analysis was used to quantify the upright posture throughout the approach as well as horizontal velocity at plant and vertical velocity at takeoff. Results： The results showed that when using the external focus of attention cue, the jumpers were significantly more upright during the approach, had significantly higher horizontal velocities at plant, and generated significantly greater vertical velocities during the takeoff. Conclusion： The results of this study lay the foundation for future work examining how integrating sport science disciplines can improve performance of elite level athletes.

The Impact of Environmental Regulation on FDI Spiilover Effects： A Cross-Provincial Study

Using correlated data from thirty Chinese provinces for the years between 2000-2009, this paper examines the impact of FDI spillover and environmental regulation on the progress of industrial technology in China as well as the impact of environmental regulation on the marginal effect of FDI. Empirical results show that while FDI spillover has a negative effect, enhanced environmental regulation has a positive effect. Environmental regulation also has a significant impact on the marginal effect of FDI spillover on industrial technology development. Separate studies on state-owned and private enterprises suggest that environmental regulation has a heterogeneous effect on industrial technology progress and the marginal effect of FDI spillover on industrial technology progress.