全球招聘新闻

正博士后[美国]Arizona State UniversityThe Inflammation and Cancer Laboratory at the Biodesign Institute at Arizona State University is searching for a postdoctoral research associate to join their team devoted to understanding how inflammation and inflammatory mediators contribute to colorectal carcinogenesis.This position will focus on the molecular and genetic basis of colorectal cancer formation and progression.The     

2013-01 全球招聘新闻

博士后 [美国] Kent State UniversityThe Kent State University (ReMedIKS) is seeking to recruit two postdoctoral research associates that will work closely with one another and with the core members of the Initiative.     

State Key Laboratory of Applied Organic Chemistry

The State Key Laboratory of Applied Organic Chemistry (SKLAOC) was founded in 1987 with the approval of the State Planning Commission. Professor Liu Zhongli is the director of the Laboratory and Professor Zhang Lihe, an academician of the Chinese Academy of Sciences, is the chairman of its academic committee. There are 30 faculty members, among them 21 are professors, working in the Laboratory.     

An Introduction to Regime of Port State Control

Port State Control （PSC）, known as the last maritime safety defense, plays an important role in maritime safety control. This paper attempts to describe PSC practice as it stands today. Background of PSC is first introduced. Then the paper presents detailed procedures of PSC. Through stating the specific procedures, it is hoped that the paper could give readers a general idea about the regime of PSC.     

A Rapid Location and State Memory Fixture System for Arbitrarily Shaped Part

A new fixture system-Rapid Location and State Memory (RL&SM) fixture system is presented.It is based on RFPE technique.In which a new method-adaptable location system is used to locating arbitrarily shapedpart.It solves the problems of part location,stock driftand accessibility of all sides of the part in machining.Any part can be machined entirely in a single setup by an appropriate machine tool.RL&SM fixture system consists of four parts:state memory,setup,data measure and information handling.The principle,components and work process of it are discussed,and some of the key techniques for industrialization are also presented.Keywords:Universal fixture,Rapid location,State memo-     

An efficient method for parallel CRC automatic generation

The State Transition Equation (STE) based method to automatically generate the parallel CRC circuits for any generator polynomial or required amount of parallelism is presented. The parallel CRC circuit so generated is partially optimized before being fed to synthesis tools and works properly in our LAN transceiv-er. Compared with the cascading method, the proposed method gives better timing results and significantly re-duces the synthesis time, in particular.     

Editor’s note

Norman (Norm) H. Sleep is Professor of Geophysics in the School of Earth Sciences at Stanford University. He received a BSc (1967) in Mathematics from Michigan State University     

Deterministic secure quantum communication and authentication protocol based on three-particle W state and quantum one-time pad

Three-particle W states are used as decoy photons, and the eavesdropping detection rate reaches 63 %. The positions of decoy photons in information sequence are encoded with identity string ID of the legitimate users. Authentication is implemented by using previously shared identity string. State 丨φ^- ） is used as the carrier. One photon of 丨φ^-） is sent to Bob; and Bob obtains a random key by measuring photons with bases dominated by ID. The bases information is secret to others except Alice and Bob. Both the eavesdropping detection based on three-particle W state and the secret ID ensure the security of the protocol. Unitary operations are not used.     

Coastal seafloor observatory at Xiaoqushan in the East China Sea

The seafloor observation system is becoming an important infrastructure for marine research because it is transforming oceanic research from temporal investigation to long term observation.The East China Sea coastal seafloor observatory,located between 30°31′44″N,122°15′12″E and 30°31′34″N,122°14′40″E,is constructed near the Xiaoqushan Island outside the Hangzhou Bay on the inner continental shelf of the East China Sea.The observatory is connected by a submarine optical fiber composite power cable that is more than one kilometer long and consists of a special junction box that transmits power and communication signals to different instruments.The special junction box has a variety of waterproof plugs and connects to three different instruments installed in a trawl preventer.The submarine optical fiber composite power cable is landed on the platform by The East China Sea Branch,State Oceanic Administration and the power is continuously supplied by the solar panels and solar battery on the top of the platform.The real time data are directly sent through the cable to the platform and are transmitted by CDMA wireless to the receiver at the State Key Laboratory of Marine Geology of Tongji University.Measurements at the observatory have been taken since April 20,2009 after installation and the results have been interpreted.The characteristics of the near bottom boundary are constrained by a sediment suspension model using portion of the observed data.In particular,discussion is provided on the sea surface height anomaly at Xiaoqushan Island influenced by the tsunami driven by the 2010 Earthquake in Chile.The successful establishment of the coastal seafloor observatory is the first step toward future development of seafloor observation systems in China.It not only accumulates experiences in technology and engineering,but also paves the way for performing important oceanic research using the long term continuous observation platform.     

GM Site in the City of Lansing（Capital of Michigan State，U．S．） Redevelopment Proposal

This article is about the redevelopment proposal of GM site（Closed General Motors（GM）Plant— part of the Lansing Car Assembly Plant）in the City of Lansing,capital of Michigan State,and the final proposal is a Mixed-use Redevelopment．As an integrated and feasible research report,it is composed of eight parts：Site Analysis,Project Concepts or Ideas,Public Interest & Involvement,Feasibility Study and Financial Report,Market Analysis and Marketing Plan,Implementation,Property,Asset and Portfolio Management,and Reversion Plan．     

GM Site in the City of Lansing（Capital of Michigan State，U．S．） Redevelopment Proposal

This article is about the redevelopment proposal of GM site（Closed General Motors（GM）Plant— part of the Lansing Car Assembly Plant）in the City of Lansing,capital of Michigan State,and the final proposal is a Mixed-use Redevelopment．As an integrated and feasible research report,it is composed of eight parts：Site Analysis,Project Concepts or Ideas,Public Interest & Involvement,Feasibility Study and Financial Report,Market Analysis and Marketing Plan,Implementation,Property,Asset and Portfolio Management,and Reversion Plan．     

一个面向服务的教学计划框架体系

The science of services constitutes a breakthrough in the traditional way of thinking of the place of informatics in the economic development of a State,a Region,an enterprise and consequently in the teaching programs.The question is no more only a question of computer science.We are in front of a more complex situation,which requires not only a multidisciplinary approach,but an interoperable approach at the intellectual level.This paper is an introduction to this complexity and it is also an attempt to propose crucial questions about the new bachelor programs and master programs.     

Brief introduction to the State Key Laboratory for Heavy Oil Processing

The State Key Laboratory 1for Heavy Oil Processing is located in both the Beijing campus and theDongying campus (in Shandong Province) at the Petroleum University. Professor Xu Chunming is thedirector of the Laboratory. Professor Lin Shixiong is the chairman of the Academic Committee and Pro-fessor Yang Guanghua is the chairman emeritus of the Academic Committee. The Academic Committeeconsists of 14 well-known specialists, including the academicians of the Chinese Academy of Sciencesand Chinese Academy of Engineering Chen Junwu, Min Enzhe, Xu Chengen and Wang Xieqing.There are 24 faculty members, including 10 professors, 6 associate professors and senior engineers.Besides, about 30-40 graduate students are enrolled in the Laboratory and participating in researchwork.     

Top Science Honor Goes to Two Tsinghua Alumni

It was a double honor for Tsinghua when alumni Liu Dongsheng and Wang Yongzhi took home the State Preemi-nent Scientific and Technical Award this year. Professor Liu, a geologist from the Chinese Academy of Science (CAS) Institute Geology and Geophysics, was recognized as the pioneer of paleoenvironmental research on Chinese loess-soil sequences. He is a graduate of the Class of 1942. Professor Wang, who graduated from Tsinghua in 1953 with a degree in aeroscience, is an engineer wi…     

Graptolite fauna indicates the beginning of the Kwangsian Orogeny

A research at the State Key Laboratory of Palaeobiology and Stratigraphy,Nanjing Institute of Geology and Palaeontology,has shown,based on a refined division and correlation of the graptolite-bearing strata in southern Jiangxi,China,that the Kwangsian Orogeny commenced in the early Katian Age of the Late Ordovician. Because of its significant research value,this study is published in Volume 53,Issue 11 of SCIENCE CHINA Earth Sciences.     

Tsinghua Research Achievements Win 2007 State Science and Technology Awards

Seventeen Tsinghua research achievements recently won 2007 State Science and Technology Awards. Tsinghua professors accepted the awards on January 8, 2008, in Beijing at the annual National Science-Technology Award Ceremony in the Great Hall of the People. Tsinghua＇s research achievements ranked first among Chinese universities. Of Tsinghua＇s seventeen awards, one was a State Natural Science Award second prize; eight were State Technological Invention Award second prizes; and eight were State Scientific and Technological Progress Award second prizes. Altogether nine research achievements were completed by Tsinghua as the lead research institution in collaboration with others.     

Changes in fossil-fuel carbon emissions in response to interannual and interdecadal temperature variability

Relationships on interannual and interdecadal timescales among global mean air temperature,CO2 concentrations and fossil-fuel carbon emissions in four major developed countries (the United States,the United Kingdom,France,and Germany) were analyzed.On an interannual timescale,the United States fossil-fuel carbon emissions tend to increase during cold winters and decrease during warm winters,which is opposite to the situation in summer.On an interdecadal timescale,cold (warm) periods both in the United States and globally agree with high (low) periods of fossil-fuel carbon emissions,with the temperature variability leading by 5–7 years.The leading correlation on the interdecadal timescale and the asymmetry in seasonal correlation on the interannual timescale indicate that temperature variability is a possible cause of changes in fossil-fuel carbon emissions.     

Three-dimensional variational data assimilation implemented in numerical modeling for Wuhan torrential rain in July 1998

On July 20～21, 1998, a torrential rain with 24-hour rainfall of 286 mm occurred in Wuhan, Hubei Province of China. In this study, a three-dimensional variational data assimilation system developed at the Fifth-Generation Pennsylvania State University/National Center for Atmospheric Research Mesoscale Model (MM5) along with conventional rawinsonde sounding and surface observation is used for modeling the heavy rain. It successfully incorporates observational data of temperature, humidity and wind, and provides an optimal analysis being in favor of the formation of heavy rain. The 24-hour rainfall predicted by the new scheme is 109 mm rather than 2.5 mm forecasted by control experiment. Furthermore, the forecasted accuracy of location and time-variation of hourly rainfall reproduced by this model is also improved. Keywords：variational data assimilation, torrential rain, numerical modeling.     

SELECTION OF STATE VARIABLES AND CONSTRUCTION OF STATE EQUATIONS

In modern control engineering and simulations,it is perferable to get the governing equationsby an easier way,so that state equations have been widely used.There are many rules to select statevariables,but the uses of these rules may have different forms of limitations and exceptions,yet afully argumented bond graph can be processed in proper way to select the state variables and toyield the state equations.The state variables are usually related to the energy-storing elements.State equations can easily be derived from bond graph by means of constitutive relations and struc-tural relations.     

Study and case simulation of a regional dust model coupled with a nonhydrostatic dynamics model

A new regional dust model suitable for simulation and forecasting of dust storms over northern China was described. The dust model was developed by coupling the mesoscale dynamics model MM5 (the Fifth-Generation NCAR/Penn State Mesoscale Model) with a set of mass conservation equations for the particles. The model includes all the atmospheric physical processes of dust storms including occurrence, lifting, transport, and dry and wet deposition. It considers the parameterization of dry and wet deposition, the dust size distribution and microphysical processes in detail. The dust flux from the surface is parameterized based on the friction velocity, which is provided by the mesoscale nonhydrostatic dynamics model, which takes account of the vegetation coverage, land use, soil category, and soil moisture. This new dust model is used to simulate the dust storm that occurred on 19--21 March, 2002 in North China. The results show that there is high dust concentration and its movement is consistent with the surface weather record and satellite monitoring images of the observed dust storm. The simulated dust concentration coincides with the observation data of the particulate concentration of PM10 (dust particles smallerthan 10 μm in diameter). The new numerical model also successfully simulates the formation and migration of the dust storm of 6-8 April, 2002 in North China.