内网安全技术浅析

对当前内网安全技术进行阐述,并介绍应对内网安全的几个策略,主要有网络准入控制及防水墙技术。通过大量的调研和资料收集工作,全面地阐述内网安全技术的背景及其含义,针对当前内网安全技术的主要问题分析其相关处理方法,综述内网安全相关技术及其策略,并通过对内网安全的相关分析,探讨内网安全技术的未来方向及其未来可能发展的趋势和技术

Evaluation on difference of therapeutic efficacy of Jiawei Xiaoyao Granules and Pills in treatment of emotional disorder during perimenopause based on Greene Climacteric Scale

目的:在前期加味逍遥丸治疗围绝经期情绪障碍具有比较优势的基础上,基于grEEnE量表探讨其颗粒剂和丸剂不同剂型间疗效差异。方法:经筛选后患有情绪障碍的围绝经期女性75例随机等分为A、b、C3组,分别对应采用帕罗西汀、加味逍遥丸和加味逍遥颗粒剂治疗8周。所有患者在治疗前后各进行1次grEEnE及其子因子评定,并在观察期结束时进行TESS评定。结果:grEEnE总分差及其焦虑、抑郁因子分差:3种治疗方法均能改善,且相互间无显著差异;grEEnE性因子和血管因子分差:后二组均优于A组(P<0.01);TESS评分:与A组比较,b、C组均有统计学意义(P<0.01),评分均小于A组,且后二组间无显著差异。结论:加味逍遥的2种剂型间疗效无显著差异,考虑到帕罗西汀的不良反应,治疗该病加味逍遥的2种剂型都值得推荐。Objective: To investigate the difference in therapeutic efficacy between Jiawei Xiaoyao Granules and pills based on the preliminary research of treating emotional disorder during perimenopause with Jiawei Xiaoyao Pills and Greene Climacteric Scale.Methods: 75 female patients with emotional disorder during perimenopause were slected and randomly divided into 3 groups as group A, B and C.Patients in the 3 groups were treated with paroxetine, Jiawei Xiaoyao Pills and Jiawei Xiaoyao Granules respectively for 8 weeks.Greene and Greene factors assessment were carried out in all the patients before and after treatment, and the TESS assessment was carried out at the end of the observation period.Results: The three therapies all could improve the gap in total score of Greene and its factors as anxiety and depressed, and the difference among these three groups was no significant.The factors of Greene and gap in score of vascular factors of group B and C was better than that of group A(P<0.01).The difference in TESS score between group A and group B and C was significant(P<0.01), while the difference between group B and group C was not significant.Conclusion: The difference in curative effect between the two formulations was not significant.Because of the adverse reactions of paroxetine, in the treatment of emotional disorder during perimenopause, the two formulations of Jiawei Xiaoyao Powder were worth to be recommended.国家自然科学青年基金项目(No.81302960)~

哺乳动物季节性换毛规律研究进展

哺乳动物是地球上适应能力最强的动物类群,可适应各种生境,具有动物界中最宽的生态幅,哺乳动物特有的皮肤衍生物——被毛,发挥了十分重要的作用,成为哺乳动物适应多种环境的重要手段。有关哺乳动物季节性换毛规律的研究,是动物生态学研究的一个重要方面,但目前相关研究少且文献较零散,缺乏系统的研究进展综述。本文从被毛的功能、被毛的生长、季节性换毛序规律以及影响哺乳动物季节性换毛的主要因素这4方面研究进行综述,探讨目前研究中存在的潜在问题,展望了哺乳动物季节性换毛规律的研究方法以及在全球变暖的大背景下,气候变化与动物物候之间的关系等方面的研究趋势,以期为未来继续深入研究哺乳动物季节性换毛规律提供一定的科学参考

机器人用RV减速器综合性能试验台技术研究与开发

针对RV减速器的各种性能及精度的试验检测,研制了RV减速器综合性能试验台,可完成传动精度、扭转刚度、背隙、启动停止转矩及空载摩擦转矩等项目测试。试验台基于光、机、电等先进测量技术,提出了光栅高频细分、精密装配和误差补偿等专有技术,实现了高达1″的高精度测量和多性能综合测量,并实现了系列化。通过用户使用验证,完全满足工程试验测试需求

采摘机器人奇异位型分析

对采摘机器人机械手臂工作空间内的奇异位型进行了分析。首先,采用D-H参数,建立了采摘机器人机械臂的坐标系图,得到其正运动方程;其次,结合机器人手臂正运动方程,构造其雅可比矩阵,再基于雅可比矩阵,求解机械手臂出现奇异状态的所有构型情况,得到所有奇异点;最后,应用Robotics工具箱,基于可操作度灵活性指标和最小奇异值灵活性指标对机械臂的奇异情况进行仿真分析。仿真结果表明,研究的机械手臂共有3种内部奇异情况,同时验证了机械手臂奇异位型求解的正确性,为后续机械手臂的轨迹规划研究和奇异点规避研究奠定了基础

Assessment of thermochemical models on nonequilibrium flowfield and radiation in shock-heated nitrogen

Numerical simulations based on various physical models are performed to study thermochemical nonequilibrium flowfield and radiation in high enthalpy shock-heated nitrogen flows and compared against available experimental shock tube data. The physical models include both the two-temperature (2T) model and the four-temperature (4T) model, each integrated with different vibration-dissociation (VD) coupling models. For Sharma and Gillespie's shock tube experiment, it is observed that the 4T model demonstrates satisfactory agreement with experimental rotational and vibrational temperatures, while the 2T results fall short of achieving comparable accuracy. When employing identical equilibrium dissociation rate coefficients and energy relaxation times, the modified Marrone-Treanor (MMT) model shows the lowest dissociation rate and the highest peak rotational temperature, which is closer to experimental data, in comparison to the Park and Marrone-Treanor (MT) models. For recent experiments conducted at the Electric-Arc Shock Tube facility (Shot 37 and Shot 40), our 4T-QSS results with the MMT model give the predictions for nonequilibrium radiative metrics closest to experimental data among the three VD models considered, although discrepancies compared to the experiments are still observed. Moreover, our investigation concludes that the influences of radiative cooling, rate coefficients of associative ionization and heavy-particle impact dissociation of N2, and predissociation of the N2(C) state on nonequilibrium radiative metrics are insignificant for these two shots. The discrepancies (persisted when incorporating various modeling options) in both nonequilibrium radiative metric and radiance versus position between the present calculations and experimental measurement indicate the necessity of employing a detailed state-to-state model and considering the shock tube-related phenomena to reproduce the experimental data

Radiation investigation behind 4.7 km/s shock waves with nitrogen using a square section shock tube

The thermochemical non-equilibrium phenomena encountered by hypersonic vehicles present significant challenges in their design. To investigate the thermochemical reaction flow behind shock waves, the non-equilibrium radiation in the visible range using a shock tube was studied. Experiments were conducted with a shock velocity of 4.7 km/s, using nitrogen at a pressure of 20 Pa. To address measurement difficulties associated with weak radiation, a special square section shock tube with a side length of 380 mm was utilized. A high-speed camera characterized the shock wave's morphology, and a spectrograph and a monochromator captured the radiation. The spectra were analyzed, and the numerical spectra were compared with experimental results, showing a close match. Temperature changes behind the shock wave were obtained and compared with numerical predictions. The findings indicate that the vibrational temperatures are overestimated, while the vibrational relaxation time is likely underestimated, due to the oversimplified portrayals of the non-equilibrium relaxation process in the models. Additionally, both experimental and simulated time-resolved profiles of radiation intensity at specific wavelengths were analyzed. The gathered data aims to enhance computational fluid dynamics codes and radiation models, improving their predictive accuracy. (sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic). (sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic), (sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic). (sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)4.7 km/s(sic)20 Pa(sic)(sic)(sic)(sic)(sic)(sic). (sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic), (sic)(sic)(sic)(sic)(sic)(sic)380 mm(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic). (sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic), (sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic). (sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic), (sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic); (sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic), (sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic), (sic)(sic)(sic)(sic)(sic)(sic): (sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic), (sic)(sic)(sic)(sic)(sic)(sic)(sic), (sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic); (sic)(sic), (sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic). (sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic), (sic)(sic)(sic)(sic)(sic)(sic)(sic)(sic)

Study of the Details of Aerosol Carbon Measurements in Autumn and Winter in Beijing

Quantitative studies on carbonaceous aerosols are based on individual bulk values of organic carbon (OC) and elemental carbon (EC) or black carbon (BC),yet few cases of in-depth interpretation of the minutiae of the measurement results are available,making full understanding and application of the information involved in instrument analysis results difficult. In October 2015 (autumn) and January 2016 (winter),rho (OC) and rho (EC) in PM_(2. 5) of Beijing were measured using the thermal/optical IMPROVE_A protocol (model 2001A), and meantime rho (BC) was measured using the optical aethalometer method (AE31). The results showed that: (1) The rho (OC) and rho (EC) in autumn were 8. 59 and 3. 89 mug/m~3,respectively, and those in winter were 16. 45 and 6. 19 mug/m~3,respectively. The values in winter were significantly higher than those in autumn. (2) The average value of rho (OC_1 ) /rho (OC) ratio in autumn samples analyzed by thermal/optical method was 0. 08 0. 04,and in winter samples,the ratio rose to 0. 22 0. 05,which may be a result of higher emissions of volatile organic compounds (VOCs) and subsequent condensation in lower ambient temperatures in winter. (3) Regarding the determination results of the 7-wavelength aethalometer,the ratio of BC equivalent measured at 370 nm (rho (BC370 ) ) to the standard BC measured at 880 nm (rho (BC880) ),i. e.,rho (BC370) /rho (BC880),was 1. 05 0. 11 in autumn,indicative of weak optical absorption by brown carbon (BrC) in that season,but jumped to 1. 47 0. 11 in winter,40% higher than that of autumn. (4) The variation trends of rho (BC) /rho (EC) and rho (PM_(2. 5) ) were very similar,implying an increased chance of core-shell internal mixing and a consequent enhancement of EC's mass absorption efficiency (MAE). rho (BC) values reported by the aethalometer were thus magnified,leading to a bigger rho (BC) /rho (EC) ratio. However,further investigation showed that the increase reached a'platform'when rho (PM_(2. 5) ) reached 50-70 mug/m~3,with an'autumn platform value'at around 1. 05 and a'winter platform value'at around 0. 55. It could be seen that the measurement results of the instruments contain a large amount of information,some of which has usually been ignored in routine practice. The in-depth interpretation of the details of the information helps better understand the comprehensive characteristics of carbonaceous aerosols

Separation, identification and performance of heterotrophic nitrification and aerobic denitrification bacteria from bioflocs in aquacultural system

A heterotrophic nitrification and aerobic denitrification strain L3 was separated and identified from bioflocs in the aquacultural system, to investigate the influential factors of bacterial growth and the denitrification performance. The result of 16S rRNA gene sequence analysis showed that the strain L3 was Pseudomonas. The optimum pH for the growth of strain L3 was 6 to 8, the suitable carbon source was sodium succinate, and the optimum temperature was 25-35℃, with the optimum C/N from 10 to 15. The strain L3 could tolerate the high ammonia concentration. By studying the characteristics of heterotrophic nitrification and aerobic denitrification, the strain L3 was found to preferentially remove ammonia and had good aerobic denitrification performance