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# Tsinghua Science and Technology

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Displaying Results 1 - 23 of 23
• ### [Front cover]

Publication Year: 2004, Page(s): c1
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• ### Contents

Publication Year: 2004, Page(s): 1
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• ### Predefined GPGRAFY-Epitope-Specific monoclonal antibodies with different activities for recognizing native HIV-1 gp120

Publication Year: 2004, Page(s):369 - 373
| | PDF (390 KB)

A seven-amino acid epitope GPGRAFY at the tip of the V3 loop in HIV-1 gp120 is the principal neutralizing epitope, and a subset of anti-V3 antibodies specific for this epitope shows a broad range of neutralizing activity. GPGRAFY-epitope-specific neutralizing antibodies were produced using predefined GPGRAFY-epitope-specific peptides instead of a natural or recombinant gp120 bearing this epitope. ... View full abstract»

• ### Point mutation identification using on-chip ligase detection reaction

Publication Year: 2004, Page(s):374 - 378
| | PDF (277 KB)

An efficient method was developed to detect point mutations using oligonucleotide microarrays and the ligase detection reaction (LDR). Allele-specific LDR primers were immobilized on polylysine-coated glass slides to perform LDR on a chip. The spotting concentration and detection limit were analyzed using a synthesized oligonucleotide as a template. The optimal primer spotting concentration was 20... View full abstract»

• ### Silica-based solid phase extraction of DNA on a microchip

Publication Year: 2004, Page(s):379 - 383
| | PDF (328 KB)

Micro total analysis systems for chemical and biological analysis have attracted much attention. However, microchips for sample preparation and especially DNA purification are still underdeveloped. This work describes a solid phase extraction chip for purifying DNA from biological samples based on the adsorption of DNA on bare silica beads prepacked in a microchannel. The chip was fabricated with ... View full abstract»

• ### Protein subcellular localization prediction and genomic polymorphism analysis of the SARS coronavirus

Publication Year: 2004, Page(s):384 - 390
| | PDF (280 KB)

The cause of severe acute respiratory syndrome (SARS) has been identified as a new coronavirus (CoV). Several sequences of the complete genome of SARS-CoV have been determined. The subcellular localization (SubLocation) of annotated open-reading frames of the SARS-CoV genome was predicted using a support vector machine. Several gene products were predicted to locate in the Golgi body and cell nucl... View full abstract»

• ### Induction of apoptosis in purified nuclei from tobacco-suspension cells by cytochrome b6/f complex

Publication Year: 2004, Page(s):391 - 396
| | PDF (434 KB)

An apoptotic cell-free system containing cytosol and nuclei from normally cultured tobacco suspension cells was used to show that a spinach chloroplast preparation can induce apoptosis in nuclei, evidenced by DNA electrophoresis and fluorescence microscopy observations. Further study showed that the chloroplast preparation or its pellet (thylakoid membrane) after hypoosmotic or supersonic treatmen... View full abstract»

• ### Delayed postprandial hypertriglyceridemia, slow gastrointestinal transit and possible links between them in alloxan-induced diabetic mice

Publication Year: 2004, Page(s):397 - 405
| | PDF (367 KB)

Both postprandial hypertriglyceridemia and diabetic gastroparesis are common dysfunctions affecting diabetes mellitus; however, whether diabetic gastroparesis has an influence on postprandial hypertriglyceridemia still remains undetermined. Delayed postprandial hypertriglyceridemia, diabetic gastroparesis, and the possible links between them were investigated using alloxan-induced diabetic mice. A... View full abstract»

• ### Packet queueing delay in resilient packet ring network nodes

Publication Year: 2004, Page(s):406 - 409
| | PDF (267 KB)

The packet queueing delay is one of the most important performance measures of a data network and is also a significant factor to be considered in the scheduling buffer design for a network node. This paper presents a traffic queueing model for resilient packet ring (RPR) networks and a method for quantitatively analyzing queueing delays in RPR nodes. The method was used to calculate the average q... View full abstract»

• ### Representation of performance data in grid systems

Publication Year: 2004, Page(s):410 - 415
| | PDF (229 KB)

The increasingly frequent exchange of performance data in grid systems across heterogeneous platforms requires a uniform “representation” of various types of performance data. This paper reviews the current related research, considers the defect of existing methods, and proposes a new portable description method: grid performance data description (GPDD) using an extensible markup lan... View full abstract»

• ### Streaming media over a color overlay based on forward error correction technique

Publication Year: 2004, Page(s):416 - 421
| | PDF (267 KB)

The number of clients that receive high-quality streaming video from a source is greatly limited by the application requirements, such as the high bandwidth and reliability. In this work, a method was developed to construct a color overlay, which enables clients to receive data across multiple paths, based on the forward error correction technique. The color overlay enlarges system capacity by red... View full abstract»

• ### Associating memory through case-based immune mechanisms for dynamic job-shop scheduling

Publication Year: 2004, Page(s):422 - 427
| | PDF (282 KB)

Knowledge plays an active role in job-shop scheduling, especially in dynamic environments. A novel case-based immune framework was developed for static and dynamic job-shop problems, using the associative memory and knowledge reuse from case-based reasoning (CBR) and immune response mechanisms. A 2-level similarity index which combines both job routing and problem solution characteristics based on... View full abstract»

• ### PCA-FA: Applying supervised learning to analyze gene expression data

Publication Year: 2004, Page(s):428 - 434
| | PDF (275 KB)

In previous gene expression data analyses, supervised learning has mainly focused on the classification of attribute data, such as the different experimental conditions, different known classes of the same tumor and sex. However, supervised learning classification is not suitable for interval-scaled attributes, such as age and survival outcome of cancer patients. For this problem, this paper propo... View full abstract»

• ### Optimal rate allocation algorithm for multiple source video streaming

Publication Year: 2004, Page(s):435 - 440
| | PDF (347 KB)

Video streaming is one of the most important applications used in the best-effort Internet. This paper presents a new scheme for multiple source video streaming in which the traditional fine granular scalable coding was rebuilt into a multiple sub-streams based transmission model. A peak signal to noise ratio based stream rate allocation algorithm was then developed based on the transmission model... View full abstract»

• ### A fair off-line electronic cash scheme based on restrictive partially blind signature

Publication Year: 2004, Page(s):441 - 443
| | PDF (218 KB)

A fair off-line electronic cash scheme was presented based on a provable secure restrictive partially blind signature. The scheme is more efficient than those of previous works as the expiry date and denomination information are embedded in the electronic cash, which alleviates the storage pressure for the bank to check double spending, and the bank need not use different public keys for different... View full abstract»

• ### Recent advances in the use of statistical mechanics to establish molecular thermodynamic models for electrolyte solutions

Publication Year: 2004, Page(s):444 - 454
| | PDF (320 KB)

Based on statistical mechanics, a review of recent theoretical studies of real electrolyte solutions is presented from three aspects, namely, molecular simulation, mean spherical approximation (MSA), and perturbation theory. Recent advances in studies of three kinds of electrostatic potentials of mean force, three kinds of internal energies (ion-ion, ion-dipole, and dipole-dipole interactions), an... View full abstract»

• ### Treatment of organic compounds in reclaimed wastewater for groundwater recharge

Publication Year: 2004, Page(s):455 - 459
| | PDF (261 KB)

To study water quality problems associated with groundwater recharge, a tertiary treatment process, consisting of coagulation, sand filtration, and granular activated carbon (GAC) adsorption, was used in combination with a simulated soil aquifer treatment. The process significantly improved secondary effluent quality. GAC adsorption reduced organic substances expressed by UV-254, dissolved organic... View full abstract»

• ### Current status, challenges, and future sustainable development strategies for China energy

Publication Year: 2004, Page(s):460 - 467
| | PDF (242 KB)

China's rapid economic growth, high-energy-intensitive industrial and product structure, coaldominated energy structure, and low-energy efficiency result in China being the second largest energy consumer as well as the second largest CO2 emission country in the world. The Markal model, an integrated energy, environment, and economic model, was used to analyze China's energy development ... View full abstract»

• ### A Parallel Algorithm for the Convection Diffusion Problem

Publication Year: 2004, Page(s):468 - 471
| | PDF (341 KB)

Based on the second-order compact upwind scheme, a group explicit method for solving the two-dimensional time-independent convection-dominated diffusion problem is developed. The stability of the group explicit method is proven strictly. The method has second-order accuracy and good stability. This explicit scheme can be used to solve all Reynolds number convection-dominated diffusion problems. A ... View full abstract»

• ### The dynamics of semigroups of transcendental meromorphic functions

Publication Year: 2004, Page(s):472 - 474
| | PDF (243 KB)

This paper considers the dynamics associated with an arbitrary semigroup of transcendental meromorphic functions. Fatou-Julia theory was used to investigate the dynamics of these semigroups. Some results of the dynamics of a rational mapping on the Riemann sphere were extended to the case. View full abstract»

• MATHEMATICS
• ### Quadratic number fields with class numbers divisible by a prime q

Publication Year: 2004, Page(s):475 - 481
| | PDF (448 KB)

Let q≥5 be a prime number. Let $k={BBQ}(sqrt{d})$ be a quadratic number field, where $d = (-1)^{(q(q-1))/(2)}bullet (-(q-1)^{q-1}uw^{q}+u^{2}q^{q})$. Then the class number of k is divisible by q for certain integers u, w. Conversely, assume Ω/k is an unramified cyclic extension of degree q(which implies the class number of k is divisible by q), and Ω is t... View full abstract»

• ### Multi-Echelon inventory model with emergency lateral transshipments

Publication Year: 2004, Page(s):482 - 488
| | PDF (280 KB)

In multi-echelon inventory systems, since neighboring retailers are located at shorter distances than the supplier, a retailer may seek stock from them when it is out of stock, that is, emergency lateral transshipments between retailers are commonly practiced to provide improved order fill rate. In this paper, we develop a continuous review multi-echelon model for consumable products when emergenc... View full abstract»

• ### A Comparative study of the application of electronic data interchange and Internet technology to business process reengineering

Publication Year: 2004, Page(s):489 - 496
| | PDF (280 KB)

This study investigates the role of information technology in business process reengineering (BPR) implementation. To increase the prospects of successful BPR implementation, the role of information technology in BPR should be thoroughly investigated to find the logical relationships between information technology and BPR. This study used a survey methodology to gather information from 72 BPR prog... View full abstract»

## Aims & Scope

Tsinghua Science and Technology (Tsinghua Sci Technol) aims to highlight scientific achievements in computer science, electronic engineering, and other IT fields. Contributions all over the world are welcome.

Full Aims & Scope

## Meet Our Editors

Editor-in-Chief
Professor Jiaguang Sun
School of Software
Tsinghua University
Beijing  100084 China
journal@tsinghua.edu.cn
Phone:86-10-62771385