泊松恒等式的简捷证明

采用特殊的符号约定以及分组配对的方法可以非常简捷地证明泊松恒等式。

J2EE-BASED DISTRIBUTED AND INTEGRATABLE MANUFACTURING EXECUTION SYSTEM

Using the Java 2 enterprise edition (J2EE), the industry standard technique, a component and web-based manufacturing execution system (MES), is presented. It is considered to be open, modularized, distributed, configurable, interoperable and maintainable. After introducing some core techniques of J2EE as the basic foundations of the proposed MES, this paper briefly analyzes the MES domain in manufacturing systems and constructs the abstract object and component model, and then establishes the MES architecture. This MES can be facilely integrated with other manufacturing applications. Finally, an example of integration with the enterprise resource planning (ERP) system is given.

Spatial channel pairing-based maximum ratio combining algorithm for cooperative relay networks

To improve the reliable performance of information transmission in cooperative relay networks, the scheme of the max-rate spatial channel pairing （SCP） based on maximum ratio combining （MRC） is proposed. The scheme includes three steps： channel phase cancellation, MRC, and SCP. Eventually, the solution of the scheme is modeled as convex optimization. The objective function of the optimization problem is to maximize the transmission rate and the optimization variable is the strategy of pairing between the uplink spatial sub-channels of each user and the corresponding downlink spatial ones. The theorem of the arrangement inequalities is adopted to obtain the approximate closed-form solution of the optimal pairing for this convex optimization. Simulation results demonstrate that compared to the existing distributed space-time block coding and coherent combined schemes without SCP, the proposed max-rate SCP plus MRC algorithm achieves appreciable improvements in symbol error rate in medium and high signal-to-noise ratio regimes. The achievable performance gain is due to the use of maxrate SCP.

Impact of Omega-3 Nutritional Protocol on the Occurrence of Preeclampsia among High Risk Pregnant Women

Purpose： to examine the impact of omega-3 nutritional protocol for risky pregnant women on the occurrence of preeclampsia. Topic： Supplementation with omega-3 has been proposed to reduce the risk of preeclampsia, but the effects of this intervention are still uncertain. Method： A RCT （randomized controlled trial） had been conducted on 400 pregnant women between 12 and 16 weeks of gestation. Women were assigned randomly to either the control group or the study group. Achievements： Of the 400 women enrolled, 195 were randomly assigned to the study group and 205 to the control group. There was a significant difference between the study and the control groups in relation to the incidence ofpreeclampsia （0.5% and 5.5% respectively, P 〈 0.05）.

Virus-like supramolecular assemblies formed by cooperation of base pairing interaction and peptidic association

A peptide nucleic acid （PNA）-peptide conjugated molecule, T＇3（AKAE）2, was designed to have both a PNA segment for oligo- nucleotide binding and an ionic self-complementary peptide sequence for self-association. T＇3（AKAE）2 could co-assemble with oligoadenines （d（A）x） to form virus-like supramolecular structures whose morphology showed dependence on the chain length and rigidity of the d（A）x molecules. Smaller nanospheres with diameters of 13.0±2.0 nm were produced in the case of d（A）6. Wormlike aggregates with lengths of 20-50 nm and diameters of 15.0±2.5 nm were found in the cases of d（A）12, d（A）ls, d（A）24 and d（A）30. And larger spherical aggregates with diameters of 18±5 nm came into presence in the cases of d（A）36 and d（A）42＋. These nanostructures were suggested to be formed under a cooperative effect of base pair recognition and peptidic association. The study provides insights into the programmed assembly of a multi-components system as well as control of the size and shade of the co-assembled structures, which is of great significance in develouing gene/drug deliverv systems.