暗斑对细菌入侵率及蛋品质的影响

实验旨在研究鸡蛋的暗斑性状是否会对大肠杆菌的跨壳入侵和鸡蛋蛋品质造成影响。本研究选取了日龄和饲养环境相同的白来航鸡545只,共收集681枚鸡蛋,其中105枚鸡蛋用于大肠杆菌跨壳入侵实验,337枚鸡蛋用于比较有无胶护膜时大肠杆菌跨壳入侵率的差异性,30枚鸡蛋用于比较同一枚鸡蛋上暗斑区与非暗斑区蛋壳气孔直径。此外,209枚鸡蛋用于测定蛋品质并进行性状关联分析。结果表明,暗斑蛋和非暗斑蛋的大肠杆菌入侵率分别为50%和39.33%,差异不显著。胶护膜组和无胶护膜组大肠杆菌入侵率分别为25.66%和69.19%,差异显著,当有胶护膜时,暗斑区与无斑区大肠杆菌入侵率分别为11.18%和14.47%,差异不显著;当无胶护膜时,暗斑区与无斑区大肠杆菌入侵率分别为11.35%和57.84%,差异显著。暗斑与蛋壳厚度、蛋壳强度、蛋重、蛋白高度、蛋黄颜色及哈氏单位不存在显著相关。本研究表明,暗斑不会增加大肠杆菌跨壳入侵的概率,同时对蛋品质无影响。

通过时间同步提高分布式入侵检测系统的检测率

分布式入侵检测系统(DIDS)是重要的信息安全措施,如何提高检测率是目前该领域的研究热点。从时间同步的角度,对提高检测率进行了讨论。首先分析了事件序列的正确性是进行分布式入侵检测的前提和基础,并提出时间同步可以改善事件的时序性。然后,结合分布式入侵检测系统典型结构提出了相应的层次式时间同步模型,给出了时间同步算法。实验证明通过时间同步能有效识别事件顺序,在一定程度上提高了分布式入侵检测系统的检测率。

一种基于混沌搜索的自适应入侵遗传算法

将生物系统中"入侵"的概念引入遗传算法,提出了一种基于混沌搜索的自适应入侵遗传算法。该算法动态地引入入侵种群,并采用混沌搜索产生入侵个体。入侵种群的扩散使优良基因得以在个体间传播,优化了种群的基因构成,能够促使种群跳出局部最小,并向全局最优的方向进化,从而有效地避免了遗传算法的早熟现象。将该算法用于函数优化及解决模式分类问题的神经网络参数训练,实验结果表明,该算法具有较快的收敛速度和较强的寻优能力。

机构综合的混沌搜索自适应入侵遗传算法研究

将生物系统中"入侵"的概念引入遗传算法,提出机构综合排斥二周期点优化求解的一种基于混沌搜索自适应入侵遗传算法。该算法动态地引入入侵种群,并利用混沌搜索产生入侵个体。入侵种群的扩散使优良基因得以在个体中传播,优化了种群的基因构成,能够促使种群跳出局部最小,并向全局优化方向进化,从而有效避免了遗传算法的早熟现象。将该算法应用排斥二周期点优化求解,实例表明该算法具有较快的收敛速度和较强的寻优能力,能够快速求出机构综合问题非线性方程组全部解。

涡旋膨胀机异形修正型线的进气口优化分析

从提高涡旋膨胀机气动功率转化效率出发,通过分析涡旋膨胀机中常用的PMP修正型线在应用中所产生的齿头入侵进气口严重的问题(最大入侵率达50%),导致进气口处气流摩擦因数增大。所以,在双圆弧加直线齿头修正型线的基础上,提出一种涡旋齿头异形修正型线的方法。根据异形齿头修正型线的特点,得出异形齿头修正型线的齿头入侵率低(最大入侵率仅为9%),进气口处气流摩擦因数小。此外,在进气过程中,任意时刻的实际进气口能够保持相对圆滑,从而减少进气口处气流摩擦因数,降低了进气口功率损耗。并且可实现涡旋膨胀机对称同步膨胀,从而达到功率平稳输出、减少机械振动的效果。因此,从理论上减少膨胀进气口功率损失,提高了涡旋膨胀机气动功率转化效率。

Model and method of permeability evaluation based on mud invasion effects

The evaluation of permeability in reservoir assessment is a complex problem. Thus, it is difficult to perform direct evaluation permeability with conventional well-logging methods. Considering that reservoir permeability significantly affects mud invasion during drilling, we derive a mathematical model to assess the reservoir permeability based on mud invasion. A numerical model is first used to simulate the process of mud invasion and mud cake growth. Then, based on Darcy＇s law, an approximation is derived to associate the depth of mud invasion with reservoir permeability. A mathematical model is constructed to evaluate the reservoir permeability as a function of the mud invasion depth in time-lapse logging. Sensitivity analyses of the reservoir porosity, permeability, and water saturation are performed, and the results suggest that the proposed model and method are well suited for oil layers or oil-water layers of low porosity and low permeability. Numerical simulations using field logging and coring data suggest that the evaluated and assumed permeability data agree, validating the proposed model and method.

Reflectivity forward modeling and a CSSI method seismic inversion study of igneous intrusive area,coked area,and gas-enriched area located within a coal seam

We applied the reflectivity method and the constrained sparse spike inverse modeling(CSSI) method to the interpretation of coal field lithologic seismic data.After introducing the principles of these two methods we discuss some parameters of a geological model involving possible gas enriched areas or intruded igneous rock.The geological model was constructed and a 60 Hz seismic response profile was obtained looking for igneous rock intrusion and coked areas of the coal seam using the reflectivity method.Starting from synthesized logging data from two wells and a synthesized seismic wavelet we calibrated the model to show accurate strata.Finally,we predicted the lithology within a 10 m igneous rock area,a 3 m coal seam area,and a coked area using the CSSI technique.The results show that the CSSI technique can identify hard to recognize lithologic features that normal profil-ing methods might miss.It can quantitatively analyze and evaluate the intrusive area,the coked area,and the gas-enriched area.

Carcinoma of the middle bile duct:Is bile duct segmental resection appropriate?

AIM:To compare survival between bile duct segmental resection(BDSR)and pancreaticoduodenectomy(PD) for treating distal bile duct cancers. METHODS:Retrospective analysis was conducted for 45 patients in a BDSR group and for 149 patients in a PD group. RESULTS:The T-stage(P<0.001),lymph node invasion (P=0.010)and tumor differentiation(P=0.005)were significant prognostic factors in the BDSR group.The 3-and 5-year overall survival rates for the BDSR group and PD group were 51.7%and 36.6%,respectively and 46.0%and 38.1%,respectively(P=0.099).The BDSR group and PD group did not show any significant difference in survival when this was adjusted for the TNM stage.The 3-and 5-year survival rates were: stageⅠa[BDSR(100.0%and 100.0%)vs PD(76.9% and 68.4%)(P=0.226)];stageⅠb[BDSR(55.8% and 32.6%)vs PD(59.3%and 59.3%)(P=0.942)]; stageⅡb[BDSR(19.2%and 19.2%)vs PD(31.9%and 14.2%)(P=0.669)]. CONCLUSION:BDSR can be justified as an alternative radical operation for patients with middle bile duct inselected patients with no adjacent organ invasion and resection margin is negative.

Prognosis of hepatocellular carcinoma accompanied by microscopic portal vein invasion

AIM:To investigate the prognostic factors in patients with hepatocellular carcinoma(HCC) accompanied by microscopic portal vein invasion(PVI).METHODS:Of the 267 patients with HCC undergoing hepatic resection at Aso Iizuka Hospital,71 had PVI.After excluding 16 patients with HCC that invaded the main trunk and the first and second branches of the portal vein,55 patients with microscopic PVI were enrolled.RESULTS:The patients with HCC accompanied by microscopic invasion were divided into two groups:solitary PVI(PVI-S:n = 44),and multiple PVIs(PVI-M:n = 11).The number of portal vein branches invaded by tumor thrombi was 5.4 ± 3.8(2-16) in patients with PVI-M.In cumulative survival,PVI-M was found to be a significantly poor prognostic factor(P = 0.0019);while PVI-M and non-anatomical resection were significantly poor prognostic factors in disease-free survival(P = 0.0213,and 0.0115,respectively).In patients with PVI-M,multiple intrahepatic recurrence was more common than in the patients with PVI-S(P = 0.0049).In patients with PVI-S,non-anatomical resection was a significantly poor prognostic factor in disease-free survival(P = 0.0370).Operative procedure was not a significant prognostic factor in patients with PVI-M.CONCLUSION:The presence of PVI-M was a poor prognostic factor in patients with HCC,accompanied by microscopic PVI.Anatomical resection is recommended in these patients with HCC.Patients with HCC and PVI-M may also be good candidates for adjuvant chemotherapy.

Coalbody structure classification method based on dual-lateral and RXO crossplot analysis

According to the positive correlation of coal ash content and natural gamma, using a new coal core reposition method, which is ordered by global and local extreme, coal samples from medium-thickness seam are reasonably located. Inte- grated the data of coal macrostructure characteristics, coal petrography analysis and coal gas production test, it studies the rela- tionship between coalbody structure and amplitude variation of different well logging data, and the tectonic coal recognition method with well logging data in fresh-water mud invasion. The results show that： the anomalous response of natural gamma ray, neutron, density and apparent resistivity does not reflect the coalbody structure type. In fresh-water drilling mud invasion, using the crossplot technique of dual-lateral, RXO resistivity response and the coalbody structure can classify granulated coal accurately; the proposed method is of good practicability and high reliability.

Spectral decomposition method for predicting magmatic intrusion into a coal bed

Accurate prediction of magmatic intrusion into a coal bed is illustrated using the method of seismic spectral decomposition.The characteristics of coal seismic reflections are first analyzed and the effect of variable time windows and domain frequencies on the spectral decomposition are examined.The higher domain frequency of coal bed reflections using the narrower STFT time window,or the smaller ST scale factor,are acceptable.When magmatic rock intrudes from the bottom of the coal bed the domain frequency of the reflections is decreased slightly,the frequency bandwidth is narrowed correspondingly,and the response from spectral decomposition is significantly reduced.Intrusion by a very thin magmatic rock gives a spectral decomposition response that is just slightly less than what is seen from a normal coal bed.Results from an actual mining area were used to validate the method.Predicting the boundary of magmatic intrusions with the method discussed herein was highly accurate and has been validated by observations from underground mining.

Finger Flexion Motion Inference from sEMG Signals

This paper provides a method to infer finger flexing motions using a 4-channel surface Electronyogram （sEMG）. Surface EMGs are hannless to the humnan body and easily done. However, they do not reflect the activity of specific nerves or muscles, unlike invasive EMCs. On the other hand, the non-invasive type is difficult to use for discriminating various motions while using only a small number of electrodes. Surface EMG data in this study were obtained from four electodes placed around the forearm. The motions were the flexion of each 5 single fingers （thumb, index finger, middle finger, ring finger, and little fingers）. One subject was trained with these motions and another left was untrained. The maximum likelihood estimation method was used to infer the finger motion. Experimental results have showed that this method could be useful for recognizing finger motions.The average accuracy was as high as 95%.

Assessment of the Allelopathic Potential of an Invasive Alien Weed Hyptis suaveolens （L,） Poit. on Germination of Oryza sativa L.

Hyptis suaveolens （L.） Poit. is an invasive alien weed commonly known as ＂Bana tulst＂ in Odisha belonging to the family Lamiaceae and widely distributed in different parts of India. The leaves of the plant have been reported to be used as stimulant, carminative, sudorific and also as a cure for parasitic cutaneous diseases besides the crude leaf extract is reported to be used against colic and stomach-ache. The leaves are the source of different alkaloids, terpenes and volatile oils having allelopathic effect. In view of this the present work was carried out with an aim to investigate the allelopathic effect upon germination of rice （Oryza sativa L.）. The result indicated that the higher concentration of the leaf leachate could decrease the percentage of germination besides identified as a potential bio-herbicide.

Congeneric invasive versus native plants utilize similar inorganic nitrogen forms but have disparate use efficiencies

Aims Soil inorganic nitrogen(N)has long been recognized to play an important role in plant invasions.Whilst comparing the N use strategies of multiple invasive versus native plant congeners along an entire N gradient is key to understanding plant invasion success,there are few related studies.Methods We conducted a potted experiment with six invasive and native congeneric pairs,which were subjected to 11 nitrate/ammonium(NO3−/NH4+)ratios(i.e.100%NO3−at one end and 100%NH4+at the other end),each with low-and high-N levels.Each species–N combination was replicated eight times,and thus there were 2112 pots in total.We measured the following traits:the total biomass,growth advantage,biomass allocation,leaf chlorophyll content and low-N tolerance.Important Findings Invasive and native congeners grew well at any NO3−/NH4+ratios,and their responses of growth,allocation and tolerance were approximately parallel along the 11 NO3−/NH4+ratios across two N levels.Plant invaders grew larger and had greater chlorophyll contents,higher root biomass allocation and stronger low-N tolerance than their congeneric natives.These findings suggest that invasive and native plant congeners may utilize similar inorganic N forms(i.e.NO3−and NH4+)across an entire N composition gradient and that higher N use efficiencies could favor alien plants to invade new plant communities where congeneric natives are dominants.