CFM国际公司启动CFM56-5B和CFM56-7B“技术嵌入”项目

日前，CFM国际公司启动了一项先进的针对其CFM56-5B和CFM56-7B机队的“技术嵌入”项目，其中包括TECH56项目开发的部分技术。该项目将于2007年初投入使用。

An Audio Zero-Watermark Scheme Based on Energy Comparing

Zero-watermark technique,embedding watermark without modifying carriers,has been broadly applied for copyright protection of images.However,there is little research on audio zerowatermark.This paper proposes an audio zero-watermark scheme based on energy relationship between adjacent audio sections.Taking use of discrete wavelet transformation(DWT),it gets power approximations,or energies,of audio segments.Then,it extracts the audio profile,i.e.the zero-watermark,according to the relative size of energies of consecutive fragments.The experimental results demonstrate that the proposed scheme is robust against general malicious attacks including noise addition,resampling,low-pass filtering,etc.,and this approach effectively solves the contradiction between inaudibility and robustness.

Study on the concentrated SF_6 quantitative intelligent ultrasonic detection system

In order to realize on-line quantitative detection on SF6 and effective control of nlnning state of SF6 high voltage power supply system, a concentrated SF6 quantitative ultrasonic on-line deteetion system has been developed based on the actual demand of electric power system consumers. There are four major characteristics in this system. Firstly, the gas of maximum 64 detection points is transferred through the specific air path to the detection devices to he detected and analyzed, thereby the electrical lines and the complicated installation of the collectors can be avoided; secondly, the differential technique is used to shield the influence of environmental factors, which effectively improves the accuracy of the acoustic detection; thirdly, the SF6 coneentration is determined by the speed and phase in the ultrasonic wave trans- mission process, therefore there is no secondary pollution for the purely physical means; finally, the ma- ture embedded technique is applied in this system to improve its intelligence and stability.

Techno-ethics Embedment： A New Trend in Technology Assessment

Facing the ethical potentials of technology, there appears a new trend in technology assessment （TA） recently, which is techno-ethics embedment that aims embed ethical perspectives within the process of assessing and developing new technologies. There are two basic dimensions of this trend： the role of ethics and the status of technology. By referring these dimensions, I articulate two different TA modes of the techno-ethics embedment： One is the ethical technology assessment （eTA） that appears as a combination of an ethical judge with the objective technological force, while the other is the combination of an engaged ethical participant with an active technological mediator. Moreover, there is an ideal status of this trend that is an engaged ethical participant with an active technological mediator. As the thought of technology accompaniment shows, both the ＂agency＂ of human and technology will be embodied to the most in this ideal status of techno-ethics embedment.

Joint Grid System Used in Embedding Technique

The joint grid system, which consists of the developed collar grid, the virtual grid and other grids, was used in the embedding technique to solve the problem of finding interpolating cells of the internal and external boundary points near the joint regions. With different boundary plane generated along different fixed surface, the collar grid obtained using hyperbolic partial equations can ensure to generate high quality grids and to provide real interpolating cells for the boundary points in the blanking regions. The virtual grid was used to convert solid wall boundary conditions into an interface condition, however, no fluid flow computations were conducted within the virtual grid. The computational result of body strake wing shows that the current developed embedding technique with joint grid system can effectively treat the geometry and can more accurately predict the flow over complexconfiguration with intersecting surfaces.

Research on CGI in Embedded System

This paper mainly studies the method of dynamic embedded Web server technology and its realization. Taking S3C2440 processor as the core hardware platform, constructed the software system of based on Linux operating system on the hardware platform; Analysis the key technology of web server, select Boa as the embedded web server, Boa server and CGIC database successfully transplanted and run the static Webpage： The paper detailed analysis of the CGI technology and using C language to compile the CGI program to realize dynamic Web server, realize the use of the Web browser to the remote Web server access control function.

The Dual Effects of Global Value Chain Embeddedness on Chinese Exports’ Technological Sophistication

This paper develops a framework for the assessment of global value chain embeddedness based on the dual structure of product embeddedness and functional embeddedness and provides a theoretical demonstration of the dual effects of the level, structure and the value sources of global value chain embeddedness on export technology sophistication. From there, the paper carries out an estimation of non-competitive input- output table using quadratic optimized algorithm with differentiation between processing trade and general trade to arrive at various indicators of foreign value-added ratio that reflect the level of global value chain embeddedness. On this basis, the panel econometric model for 27 manufacturing sectors of China between 2001 and 2010 is employed to test the effect of foreign value-added ratio on the technology sophistication of manufacturing export. Our research indicates that by taking part in division of labor in the global value chain and acquiring foreign intermediate inputs, China＇s manufacturing sector has increased its export technology sophistication. It also indicates that, compared with such inputs as raw materials and parts and components, service input has great contributions to technology improvement. With the direct contributions of foreign value-added under control, the foreign value-added from developed countries has a restrictive effect on the R＆D activities of export manufacturing, which gives rise to the one-way technology reliance on dominant enterprises of the value chain and the ＂low-end lock-up＂ effect; meanwhile, the method of embeddedness that takes advantage of the foreign value-added of other countries is more dependent on the indigenous R＆D capacity of export enterprises and thus more favorable to the improvement of export technology sophistication.

The design of Three Gorges Hydropower Station

Using physical model and numerical simulation techniques, some technical problems were studied systemati- cally, including layout of power station, measures of sediment and floating debris discharging, types of intake, embed- ded types of spiral ease, layout of underground powerhouse tunnel group and block reinforcement. It was optimal in technique and economy with the arrangement of powerhouse at the dam-toe of both banks ＋ underground powerhouse in the right bank, as well as the intake with a single and small orifice. The sediment and debris problems could be solved with disperse sediment ejection and floating debris discharging holes. With the adoption of techniques for spiral cases such as heat and pressure preservation, cushion layer and combined embedding, the stable operation of generating units can be guaranteed. The arrangement of tailrace tunnel with sloping ceiling was better than that of tailrace surge tank. The technical requirements related to the embedding type of spiral case were proposed. The reinforcement of huge unfavorable blocks was discussed and the new idea for block reinforcement using anti-sliding piles and normal compressive stress of structural plane was put forward.

Interaction between Standardization and Low-Carbon Economic Development

Low-Carbon economy is the main direction of China＇s sustainable development in the future, in which technical innovation is the key. Standardization and low-carbon economy interact with each other and develop together in the principle of continuous improvement and spiral progress. They embed the social development system in a flexible mode of technical penetration, and become the important links in the industrialization chain of technical innovation. Standardization promotes the low-carbon economic development in seven aspects including ＂systematic coordination and overall promotion＂, ＂technical accumulation and innovative diffusion＂, ＂quality improvement and waste reduction＂, ＂continuous improvement and spiral progress＂, ＂barrier elimination and cooperation enhancement＂, ＂technical support for market mechanism＂ and ＂local standards and regional emission reduction＂, etc. This paper is a periodical research achievement of Two-oriented Society.

Research on CGI Technology in the Management of Greenhouse Temperature Control

The paper takes embedded Web server as control core, realizes the multi sensor data and control interface dynamic transmission combine with CGI technology., The user remote access to the embedded Web server by Internet, realize the monitoring of greenhouse environment paramelers and control by Web browser user. The system ensures accurate detection and real-time control of the greenhouse environmen! factor, that can provide a suitable environment for the growth of greenhouse crops.