采用ν-SVR算法预测单桩极限承载力

提出一种基于ν-SVR的单桩极限承载力预测方法。该方法从基桩高应变动测试验结果中提取特征参数,组成反映基桩竖向承载力的特征向量,并利用一种改进的支持向量机(ν-SVR)的非线性映射特性和学习能力,建立特征向量和单桩竖向极限承载力之间的非线性隐式方程,用以预测单桩极限承载力。在预测模型建立过程中,采用留一法和网格搜索法相结合进行预测模型选取。实例研究表明:基于ν-SVR的单桩极限承载力预测方法比凯司法及人工神经网络法的预测结果更接近静载试验结果,且预测结果较为准确,具有一定的实用价值。

径向基支持向量机推广能力快速估计算法

提出了一种估计径向基支持向量机推广能力的方法,利用解的稀疏特性和径向基核的特点以及训练过程产生的中间参数,无需增加更多的复杂运算,就能实现推广能力的估计,与其他方法相比,估计时间大大减小且适用于不同的分类超平面;并通过理论分析和试验证明该方法是一种通用的估计方法,可以适应范围很广的支持向量机模式识别问题.

电力市场中计算输电电价的一种新方法

该文基于边际成本理论,提出了一种计算输电电价的新方法,在保留边际成本定价中的经济信息的同时,综合考虑了无功电价,又考虑了电网的年收支平衡,最后,通过潮流跟踪法,确定有功、无功电价及固定成本在各个用户间的分配,使定价模型更加合理、完善。经IEEE6节点系统算例证明,该文所提的模型和算法是正确而有效的,具有重要的理论意义和工程实际价值,特别是对于在厂网分开后电网建设以及维护电网稳定的资金筹措有相当的指导价值。

Determination of Residual Enrofloxacin in Fish Tissues by Terbium Ion-sensitized Fluorophotometry

In order to establish a new method for the determination of enrofloxacin, on the basis of the fluorescence characteristic of terbium-enrofloxacin complex, it was found that in a HAc-NaAc buffer solution with a pH value at 6.0, the terbiumenrofloxacin complex had a characteristic fluorescence peak of Tb3＋ at 545 nm （λex= 328 nm）, which could be used for the determination of enrofloxacin. A simple, rapid and sensitive fluorescence method for the determination of enrofloxacin was thus established, and an optimal reaction condition was selected. Under the optimal reaction condition, there was a good linear relation （r2=0.992 3） between concentration of enrofloxacin in the range of 1.0×10^-1.0×10^-6 g/ml and its fluorescence intensity at 545 nm, with a detection limit of 1.3×10^-9 g/ml; the recovery for enrofloxacin in tablets was 97.7% with a variation coefficient of 1.4%; and for enrofloxacin in fish tissues, the recovery was 79.0%-94.5% with a variation coefficient of 2.0%-7.8%.

A long-term-based handover decision algorithm for dense macro-femto coexistence networks

For the dense macro-femto coexistence networks scenario, a long-term-based handover（LTBH） algorithm is proposed. The handover decision algorithm is jointly determined by the angle of handover（AHO） and the time-tostay（TTS） to reduce the unnecessary handover numbers.First, the proposed AHO parameter is used to decrease the computation complexity in multiple candidate base stations（CBSs） scenario. Then, two types of TTS parameters are given for the fixed base stations and mobile base stations to make handover decisions among multiple CBSs. The simulation results show that the proposed LTBH algorithm can not only maintain the required transmission rate of users, but also effectively reduce the unnecessary numbers of handover in the dense macro-femto networks with the coexisting mobile BSs.

Preparation of N, O-carboxymethyl Chitosan Composite Nanofiltration Membrane and Its Rejection Performance for the Fermentation Effluent from a Wine Factory

N, O-carboxymethyl chitosan （NOCC） composite nanofiltration （NF） membranes were prepared by coating and cross-linking. The fermentation effluent from a wine factory was treated with the resulting NOCC/polysulfone （PSF） composite NF membranes. The permeate flux and the removal efficiencies of the resulting NF membranes for the color, chemical oxygen demand （CODcr）, total organic carbon （TOC）, and conductivity of the fermentation effluent were investigated in relation to the driving pressure, the feed flow, and the operation time. The permeate flux and the removal efficiencies were found to increase with the increase of the driving pressure or the feed flow. At 0.40 MPa and ambient temperature the removal efficiencies were 95.5%, 70.7%, 72.6%, and 31.6% for color, CODcr, TOC, and conductivity, respectively. The membrane was found to be stable over a 10-h ooeration for the fermentation effluent treatment.

SPE-HPLC Method for the Determination of Avermectin Residues in Milk and Beef

Here we propose a method for determination of Avermectin residual content in milk and beef content. After extracting and processing the sample, use high performance liquid chromatography （HPLC） for determination. Mobile phase is： V（Methanol）： V（Water）=90： 10; determination wavelength is 245 nm; flow rate is 0.8 mL/min. Avermectin is completely separated in 17min, linear range is 5 - 0.3 g/L, correlation coefficient is 0.9997, average recovery rates of Avermectin in milk and beef are respectively 91.20 %- 100.32 % and 89.93 %-99.15 %, the relative standard deviations are respectively less than 7% and 4%. This method is simple, sensitive and accurate, so is suitable for determination of Avermectin residues in milk and beef, and it can meet domestic and foreign testing requirements.

Comparison of Wheat Planting Methods and Residue Incorporation Under Saline-Sodic Soil

The present research was conducted to monitor the wheat productivity along with residue incorporation under saline-sodic soils by examining different planting methods at Zaidi Farm, Kakar Gill, Sheikhupura District, Punjab Province in 2007-2008. Randomized Complete Block Design （RCBD） with three replications was used having treatments： control （broadcast）, zero till wheat plantation, wheat plantation using happy seeder and wheat plantation on raised beds. It was observed that tillering was pretty higher （141 and 139 m2） under raised bed as well as happy seeder plantation as compared to zero tilled wheat and broadcast technique. A significant relation was detected among maximum straw and grain yield （4,898 and 1,752 kg-ha1） in raised bed followed by happy seeder planting method. The lowest grain yield was recorded in the broadcast method. Maximum net revenue earned by raised bed planting method （39,908 PKR） followed by happy seeder methodology （37,533 PKR）. The overall study suggests that raised bed and happy seeder wheat plantation are the superior planting methods.

Removal of Nitrogen and Phosphorus from Saline Wastewater Using Up-Flow Sludge Blanket Filtration Process

There is recent trend of providing additional treatment of wastewater beyond tertiary level. The purpose is to refine water to a quality that is safe for reuse for unrestricted irrigation and other non potable uses. For this purpose, Kuwait has built and operated an advanced wastewater treatment plant with capacity of 500,000 m3·dl. This plant providing treatment beyond tertiary utilizes the process of Ultra Filtration （UF） and Reverse Osmosis （RO）. The reject water of this unit contains high concentration of total nitrogen and total phosphate. Safe disposal of this water into the environment or possible reuse needs substantial reduction of these chemicals. In this study, a bench scale up-flow sludge blanket filtration system was investigated. The system operated with an average Hydraulic-Retention Time （HRT） of 19 h, whereas, sludge age varied within the range of 14 days to 16.5 days. The results show that the average removal efficiencies of the system for Biological Oxygen Demand （BOD）, Chemical Oxygen Demand （COD） were over 86% and 82% respectively. The phosphate and nitrogen＇s average removal were found to be 50% and 45% respectively.

Analysis Method for Pesticide Residues in Biological Matrices： Gas Chromatography-mass Spectrometry

Pesticides have done a great service to human, but their use is not safe for public health. Apart from pesticides acute toxicity, their chronic toxicity can cause various problems for human health. The objective of this work was to validate a liquid-liquid extraction method, which allows a fairly reliable analysis of pesticides using gas chromatography-spectrometry mass （GC/MS） in toxicology laboratory at National Institute of hygiene, Rabat Morocco. The equipment required to perform these analyzes are the biological matrices （blood, gastric fluid）, in which the authors have doped the Organophosphorus pesticides such as Chlorpyrifos, Dichlorvos and Organochlorine pesticide： dichlorodiphenyltrichloroethane （DDT） and Heptachlor. After extracting the mixture with toluene, the supernatant was collected after centrifugation and concentrated in a small volume of 1.5 mL and then analyzed in GC/MS. After analyzing, the authors found that the yields of each pesticide in samples are significant; respectively they represented 73.4% of Chlorpyrifos, 70.8% of Dichlorvos, 47.8% of DDT and 71.6% of Heptachlor. The blood has a strong link with the most pesticides, where it＇s important to use the GC/MS to identify these products. The extraction with toluene was effective, especially to OP, but it＇s also sensitive to OC.

Analysis on distribution law of the abutment pressure of the integrated coal beside the road-in packing for gob-side entry retaining in fully-mechanized caving face

The three-dimensional damage constitutive relationship of coal is established and distribution law of the abutment pressure of the integrated coal beside the road-in packing for gob-side entry retaining in fully-mechanized caving face under the effect of given deformation of the main roof is analyzed by the damage mechanics theory. And the relationship between distribution of the abutment pressure and thickness of coal seam is explored. The presented result is of great theoretical significance and practical value to the study on stability control of the surrounding rock of road-in packing for gob-side entry retaining in fully-mechanized caving face.

A high-level synthesis based dual-module redundancy with multi-residue detection(DMR-MRD)fault-tolerant method for on-board processing satellite communication systems

On board processing(OBP) satellite systems have obtained more and more attentions in recent years because of their high efficiency and performance.However,the OBP transponders are very sensitive to the high energy particles in the space radiation environments.Single event upset(SEU)is one of the major radiation effects,which influences the satellite reliability greatly.Triple modular redundancy(TMR) is a classic and efficient method to mask SEUs.However,TMR uses three identical modules and a comparison logic,the circuit size becomes unacceptable,especially in the resource limited environments such as OBP systems.Considering that,a new SEU-tolerant method based on residue code and high-level synthesis(HLS) is proposed,and the new method is applied to FIR filters,which are typical structures in the OBP systems.The simulation results show that,for an applicable HLS scheduling scheme,area reduction can be reduced by 48.26%compared to TMR,while fault missing rate is 0.15%.

高发区自然人群贲门癌血清蛋白指纹图诊断模型的建立及临床价值

目的用表面增强激光解吸离子化飞行时间质谱(SELD I-TOF-MS)分析食管癌高发区自然人群中贲门癌和正常对照血清蛋白表达谱的改变,筛选并建立高发区贲门癌血清蛋白指纹图诊断模型并探究其临床价值。方法采用CM10蛋白芯片及SELD I-TOF-MS技术对34例贲门癌和38例正常对照者血清蛋白指纹图谱进行检测,所得结果用ZUC I-蛋白芯片数据分析系统(ZUC I-Prote in Ch ip Data Analyze System)软件包分析,建立贲门癌蛋白指纹图诊断模型,并用留一法交叉验证作为评估模型、判别效果的方法。结果通过软件包运算,用3个质荷比峰(5 643.457 93、8 570.821 26、15 940.153 3 m/z)建立了贲门癌蛋白指纹图诊断模型,其准确度93.06%,敏感度85.29%,特异度100%,阳性预测值100%。结论本组建立的诊断模型可以有效区分贲门癌和健康人,为肿瘤高发区贲门癌的诊断与筛查提供了一条崭新途径。

燃气轮机CCHP变工况节能特性研究

燃机冷热电联产因充分利用烟气余热而具有节能减排的重要价值,变工况运行是系统的工作常态,分析变工况节能效果有助于提高系统节能性。因系统运行工况十分复杂,一般采用建模仿真进行分析,当前主要建模仿真方法所需样本量过大,实际情况难以满足建模要求。为解决上述问题,设计了一种燃机三联产系统,基于CMSVM2.0平台应用LOOCV-SVM算法以小容量样本建立一套变工况模型。通过实例计算表明,基于小样本建立的模型精度可靠,可用于燃机三联产变工况节能性研究。

Study on Detection of Organochlorine Pesticide Residue in Ginseng

To investigate the residue situation of pesticides in ginseng, total 17 samples of ginseng-growing soil, ginseng roots and ginseng seeds were collected from 5 regions of Fusong County, and the contents of organochlorine pesticide residues in the samples were detected by using ultrasonic-assisted extraction and gas chromatography with acetone-ligroin as the solvent, thereby providing suitable recommendations and scientific basis for the selection of ginseng-growing soil.

Research and application of mechanical models for the whole process of 110 mining method roof structural movement

For the 110 mining method,it is challenging to accurately calculate the support resistance of the roadway due to the lack of understanding of the dynamic movement of the overlying strata in this method.The consequential excessive support results in a significant increase in the cost of roadway support.The authors explored the overlying strata movement and roadway deformation of the gob-entry retaining in the 110 mining method to solve this problem.First,the typical stages of the roof-cutting gob-side entry were defined.Second,the mechanical model and calculation formula of the support resistance on the roof were explored.Then,using numerical simulation software,the starting ranges of the specific supports at different stages were verified and the feasibility of the support scheme was examined.Finally,combined with the field measurement data,the stress and the deformation of the gob roadway at different stages under the influence of two mining processes in the 110 mining method were obtained.The numerical simulation results obtained are consistent with the field test results,providing a theoretical basis for precision support at different stages by the 110 mining method.

An Orthogonal Approach to Reusable Component Discovery in Cloud Migration

As an innovative software application mode,Software as a service(SaaS) shows many attractive advantages.Migrating legacy system to SaaS can make outdated systems revived.In the process of migration,the existing valuable components need to be discovered and reused in order that the target system could be developed/integrated more efficiently.An innovative approach is proposed in this paper to extract the reusable components from legacy systems.Firstly,implementation models of legacy system are recovered through reverse engineering.Secondly,function models are derived by vertical clustering,and then logical components are discovered by horizontal clustering based on the function models.Finally,the reusable components with specific feature descriptions are extracted.Through experimental verification,the approach is considered to be efficient in reusable component discovery and to be helpful to migrating legacy system to SaaS.

TRAFFIC ENGINEERING IN IP BACKBONE NETWORK

This paper discusses traffic engineering with multi protocol label switching (MPLS) in a backbone of Internet data center (IDC) network. The traditional SPF routing limitations are analyzed and the traffic engineering concept is given. MPLS, resource reservation protocol (RSVP) and enhanced link status Protocols intermediate system to intermediate system (IS IS) are reviewed to provide a background for traffic engineering, the general issues of designing an MPLS system of IDC network for traffic engineering are then discussed. Finally a practical example with MPLS traffic engineering is shown.

CLINICAL OBSERVATION ON TREATMENT OF STUBBORN HICCUP BY ACUPUNCTURE WITH DIFFERENT NEEDLE RETAINING TIME

Purpose:Observe the effect of different duration of needle-retention on acupuncture treatment of stubborn hiccup. Methods: 85 cases of stubborn hiccup patients are randomly divided into control group (n=40) and treatment group(n=45) according to their visiting time. For patients of control group, acupuncture needles (in both scalp points and body acupoints) are retained for 30 min, while for patients of treatment group, the needles inserted in the body acupoints are retained for 1 hr, and that inserted in scalp-point is retained for more than 6 hrs. The treatment is conducted once daily, continuously for 5 times. Results: The cure rate of treatment group is 88.9% (that for deficiency syndrome is 85.3%), and that of control group is 65% (that for deficiency syndrome is 53.3%).There is a significant difference between two groups in the cure rate (P<0.05). The cure rates for excess syndrome of two groups both are 100%.Conclusion: Longer retention of acupuncture needle has a better therapeutic effect for deficiency-syndrome type hiccup.

CLINICAL OBSERVATION ON TREATMENT OF 89 CASES OF URINE RETENTION WITH ACUPUNCTURE

In the present paper, 89 cases of urine retention patients were treated with acupuncture therapy.Qugu (CV 2) and Zhaohai (KI 6) were punctured and stimulated with reinforcing or reducing needling method according to syndrome differentiation. Following treatment, of the 89 cases, 69 (77.5%) had remarkable improvement of their symptoms, 19 (21. 3 % ) experienced improvement and one had no apparent change, with the total effective rate being 98.8%.