地市级供电局配电网通信技术分析

分析了配网通信承载的业务需求,多维度比较了光纤通信、中低压载波、无线专网、无线公网等多种通信技术,提出了各种业务的承载方式,为配电通信网络规划、建设提供参考。     

内蒙古东胜至乌海新建铁路对沿线景观格局的影响分析

采用遥感和地理信息系统技术,对内蒙古东胜至乌海新建铁路沿线景观进行分类和制图,通过对修建铁路景观指数的计算,分析了铁路修建对景观格局的影响。结果表明:修建铁路建设工程对沿线小尺度范围的景观格局影响较大,对沿线较大尺度范围的景观格局影响不明显。     

关于4G LTE移动专网在大学城园区的应用设计

针对4G时代下4G网络用户中每年的大学生客户在消费群体中占据了绝大部分这一现象。研究了大学生客户的消费情况,发现4G通信在大学生生活中占据大部分时间。因此,4G LTE移动专网在大学城园区的应用设计将会对大学城园区带来改变。得出了4G LTE移动专网在大学城园区的应用设计是一个必然趋势,所以值得研究探讨。     

应用MSC POOL构建融合高效核心网络

着2G/3G网络规模的不断扩大及通信设备高集成度,大容量的发展趋势,移动核心网的网络安全和设备利用已成为运营商关注的重点.MSC POOL就是基于这种理念产生的,是一种把多个MSC组成资源池,使用户能够共享池内所有MSC资源的先进核心网组网技术,有效地解决了2G和TD-SCDMA网络高效,可靠的问题.     

浅谈在铁路案件现场中如何合理选择、使用嗅源

正一、铁路案件现场的特点在铁路公安机关管辖范围内的铁路货场、铁路沿线普遍地域开阔、地处偏僻、嗅源条件较好,具备了使用警犬技术的良好条件。所以,在铁路案件现场中科学保护,合理选择嗅源,及时使用警犬技术,是侦破铁路案件的重要手段。铁路常发的货物盗窃案件现场地域性强,     

使用警犬追踪成功搜救走失人员1例分析

<正>近些年来,铁路公安警犬工作能够与时俱进跟上时代的发展步伐,根据任务性质不同的需要,在铁路沿线重点区段及大站站点专门设立基层派出所警犬工作点,专门用来应对所管辖区内发生的各类刑事案件或治安案件,以及铁路沿线人民群众需要救助的突发性事件的用犬需求。铁路公安警犬技术已然成为一支应急救援不可缺少的重要力量。     

铁路系统特有案件中追踪犬训练方法的探析

铁路系统特有案件对追踪犬的使用要求是有所侧重的:有些案件只需要犬突破起点,提供逃逸方向;而有些案件则需要犬长时间作业发现赃物或直接抓获犯罪嫌疑人。铁路特有案件包括:货场物资偷盗、偷盗货运列车贵重物资系统、铁路沿线搁置障碍物、拆盗铁路设备设施等。铁路特有案件主要特点有:一、     

铁路系统特有案件中追踪犬训练方法的探析

铁路系统特有案件对追踪犬的使用要求是有所侧重的：有些案件只需要犬突破起点,提供逃逸方向;而有些案件则需要犬长时间作业发现赃物或直接抓获犯罪嫌疑人。铁路特有案件包括：货场物资偷盗、偷盗货运列车贵重物资系统、铁路沿线搁置障碍物、拆盗铁路设备设施等。     

大数据时代社交网络模型的研究综述

大数据从其诞生以来对社会的各个领域产生了不可量化的影响。传统的社交网络模型在大数据时代受到了挑战和制约。文章提出,在社交网络模型中,面对复杂、不确定的大数据,保证用户的隐私与安全,使得数据在社交网络中有效、可用,这是新型社交网络模型中需要解决的问题。     

企业信息化与云计算问题研究

云计算是分布式处理、并行处理、网格计算、网络存储和大型数据中心的进一步发展和商业实现。云计算就是通过网络把信息技术当作服务来使用。用户使用云计算的服务就像使用水和电一样,只需要一个终端完成输入输出,所有的业务和数据处理都由网络完成,而用户不必考虑这些数据和服务在什么地方,只要按照流量和服务向运营商支付费用即可,运营商负责维护存储数据的数据中心和运行应用程序的服务器集群,也就是说运营商负责提供存储空间、维护应用程序和保证信息的安全。云计算技术在国内企业应用中得到了大力的发展,企业只有充分了解云计算所带来的挑战和机遇,才能更好地适应这种信息化的创新。云计算技术的应用为企业信息化展示了美好的前景。     

商会自治的基石——商会自治规范研究

在现代法律秩序中,商会自治规范是制定法的基础和必要的补充,甚至在某些方面替代了制定法;商会自治规范主要包括商会组织规范、行为规范、惩罚规范以及争端解决规范等;其效力仅及于其内部成员;商会自治规范和制定法之间存在冲突,但也存在整合的基础。     

癸氧喹酯干混悬剂含量测定的改进

采用高效液相色谱法测定癸氧喹酯干混悬剂的含量,在2-250μg/mL范围内,峰面积的常用对数与进样量浓度的常用对数呈良好的线性关系,R^2=1(n=5),平均回收率为99.24%~99.51%,RSD在0.05%~0.28%。此方法分析时间短,样品前处理简便、定量结果准确,重现性好,结果满意,为其质量控制提供了依据。     

猪毛色遗传的研究进展

本文概述了猪的毛色类型、猪的毛色遗传模式,着重综述了猪毛色基因分子基础的研究进展,指出存在问题并就未来发展方向做了思考。     

Comparison of 2 methods of centesis of the bursa of the biceps brachii tendon of horses

REASONS FOR PERFORMING STUDY: Centesis of the bicipital bursa using an 8.9 cm long spinal needle has been reported but the alternative of employing a 3.8 cm long hypodermic needle requires validation. OBJECTIVE: To compare the efficacy of 2 different methods of centesis of the bicipital bursa and to evaluate the usefulness of ultrasonographic imaging to determine the location of solution administered when centesis of the bursa is attempted. METHODS: For Trial 1, 6 clinicians, who had no previous experience of centesis of the bicipital bursa, attempted to inject a solution composed of an aqueous radiopaque contrast medium and physiological saline solution (PSS) into the bicipital bursae of 2/12 horses using the previously described distal approach to inject one bursa and a proximal approach to inject the contralateral bursa. The bicipital tendon and bursa were examined ultrasonographically before and after injection; and both shoulders were examined radiographically to identify the location of the medium. In Trial 2, another 6 clinicians, also with no previous experience of centesis, repeated Trial 1, using 6 horses, but the radiopaque contrast medium was mixed with air instead of PSS. RESULTS: Accuracy of centesis using the proximal approach was 39% and that of the distal approach 28%. Ultrasonographic examination of the shoulder allowed the location of solution and air to be accurately predicted in all 12 shoulders examined. CONCLUSIONS: Clinicians who have had no previous experience performing centesis of the bicipital bursa are unlikely to be successful in centesis using either approach. Radiographic examination after injecting a radiopaque contrast medium may be necessary to assess the success of centesis especially if bursal fluid is not obtained during centesis. Injecting air along with the radiopaque contrast medium provides more accurate ultrasonographic confirmation of centesis and better radiographic definition than does injection without air.     

不同样本商品蜂蜜中硒含量的测定

用硝酸和高氯酸消化蜂蜜,使硒游离出来,在微酸性环境下,硒和2,3-二氨基萘(DAN)生成有较强荧光的物质,用环己烷萃取,在激发波长378nm,荧光波长518nm处测定其荧光强度。蜂蜜中硒含量范围:0.10～0.82μg/g。表明:蜂蜜应视为天然富硒营养品。     

乳酸杆菌益生作用机制的研究进展

乳酸杆菌作为益生菌广泛用于人和动物。本文综述了乳酸杆菌改善宿主健康的机制。乳酸杆菌可通过产生抗菌物质如乳酸、过氧化氢、细菌素,或者通过竞争营养或肠道黏附位点来抑制致病菌;通过诱导黏附素的分泌或阻止细胞凋亡而增强肠道的屏障功能,从而保护肠道。文章重点讨论了乳酸杆菌表面成分（表面蛋白、脂磷壁酸和肽聚糖）与肠道受体（Ｃ型凝集素受体、Ｔｏｌｌ样受体和 Ｎｏｄ样受体）,阐述了他们结合后启动免疫调节信号,调控肠道免疫功能以发挥改善健康作用的机制。     

中华人民共和国农业部公告 第267号

为贯彻落实《兽药生产质量管理规范》(简称《兽药GMP》),进一步推动兽药GMP实施进程,我部制定了《兽药生产质量管理规范检查验收办法》,现予公告。本公告自2003年6月1日起施行。附件:兽药生产质量管理规范检查验收办法二○○三年四月十日第一章 总则 第一条 为推动《兽药生产质量管理规范》(以下简称兽药GMP)的实施,规范兽药GMP检查验收工作,制定本办法。 第二条 农业部负责全国兽药GMP管理和检查验收工作;负责制修订兽药GMP检查验收管理规定;负责兽药GMP检查员队伍建设和监督管理工作,负责国际兽药贸易中GMP互认工作。 …     

鸡败血支原体垂直传播模式及其阻断方法

以国际标准强毒Ｒ株人工感染非免疫产蛋鸡,定时扑杀,分别从鼻窦、眶下孔、气管、肺、气囊、卵巢和输卵管分离ＭＧ,并收集感染鸡所产蛋分离ＭＧ。结果表明,人工感染４８小时后上、下呼吸道及肺已被全面感染,９６小时气囊已被感染,１２０小时输卵管已能分离到ＭＧ,卵巢始终分离不到ＭＧ。人工感染鸡自１４４小时便能在其所产蛋中分离出ＭＧ。药物治疗能在７２小时内消除感染,油乳剂苗则需２４天后逐渐降低蛋内ＭＧ分离率,药物卵内注射、种蛋药浴、高温处理均能杀死卵内ＭＧ,但以研制的种蛋浸泡剂药浴效果为最好。     

Effects of size of ingestively masticated fragments of plant tissues on kinetics of digestion of NDF

Ingestively masticated fragments were collected and sized via sieving. Different sizes of esophageal masticate and ruminal digesta fragments, and ground fragments of larger masticated pieces were incubated in vitro, and undigested NDF remaining at intervals of up to 168 h of incubation was determined. The ruminal age-dependent time delay (tau) for onset of digestion of NDF was positively correlated (P < 0.004) with the mean sieve aperture estimated to retain 50% of the fragments between successive sieve apertures (MRA). Degradation rate of potentially degradable NDF (PDF) and level of indigestible NDF were not related (P > 0.10) to MRA of masticated and ground fragments. Estimates of tau were positively related to MRA, with slopes of bermudagrass < corn silage < ruminal fragments of corn silage. It was concluded that fragment size-, and consequently, ruminal age-dependent onset of PDF degradation of a mixture of different fragment sizes results in an age-dependent rate of degradation of the more rapidly degrading of two subentities of PDF. Models are proposed that assume a tau before onset of simultaneous degradation of PDF from two pools characterized as having gamma-modeled age-dependency and age-constant rates. The ruminal age-dependent pool seems to be associated with the faster-degrading pool, and its rate parameter increases with range in MRA in the population of fragments. Conceptually, the ruminal age-dependent rate parameter for PDF degradation seems to represent a composite of several effects: 1) effects of the size-dependent tau; 2) range in MRA of the population of ingestively masticated fragments; and 3) subentities of PDF that degrade via more rapid age-dependent rates compared with subentities of PDF that degrade via age-constant rates. The estimated fractional rates of ruminative comminution of ingestively masticated fragments (0.060 to 0.075/h) were of a magnitude similar to the mean fractional rates of PDF digestion (0.030 to 0.085/h), which implies that ruminative comminution may be first-limiting to fractional rate of PDF digestion. The in vivo roles of ingestive and ruminative mastication of fragments on PDF degradation must be considered in any kinetic system for estimating PDF digestion in the rumen. These results and others in the literature suggest that the rate of surface area exposure rather than intrinsic chemical attributes of PDF may be first-limiting to degradation rate of PDF in vivo.