浅谈蛋鸡滑液囊支原体早发现早控制

为有效控制滑液囊支原体对蛋鸡产业的影响,本文介绍了如何早发现鸡场感染滑液囊支原体、建立巡查或观察鸡群制度、建立早期监测与诊断制度、建立预警分析制度、严格淘汰弱鸡和感染鸡,以促进养鸡企业早发现,早控制滑液囊支原体病,降低滑液囊支原体对蛋鸡养殖经济损失,保障蛋鸡健康生产。

烟草苗期去叶处理对控制早花现象的作用

研究证明在成苗期（8～10 片叶）和移栽后受到低温诱导的烟苗会提前进行花芽分化，并引起烟草早花。烟草品种NC82、NC89和RG11对低温诱导较敏感，K326、K346对低温的敏感度相对较弱。在移栽前控制烟苗的叶面积，去除25cm2以上的大叶，可推迟低温诱导烟草早花的时间。而烟苗大量去叶（只留上部3片叶）后再进行锻苗移栽，可缩短烟苗移栽后恢复生长的时间，并不会对烟草的前期生长和烟叶产量产生不利影响。

胎盘早剥22例

目的探讨胎盘早剥的病因、临床特点及防治措施。方法回顾性研究某院2002年6月至2009年6月胎盘早剥22例临床资料,分析其发病原因、症状、体征、分娩方式、母婴结局。结果胎盘早剥发生率为0.90%,妊娠高血压综合征15例(68.2%),为胎盘早剥首要诱因。死胎、死产、新生儿窒息的发病率均高于同期住院分娩的发病率。结论重视诱因及临床表现,早期诊断,及时处理,可以降低孕产妇和围产儿的死亡率。

胎盘早剥的预防与护理

【目的】探讨胎盘早剥的病因、预防及护理要点。【方法】回顾性分析本院2006年1月～2008年12月收治的94例胎盘早剥病例。【结果】胎盘早剥发生率为0．61％，胎膜早破为首位发病因素（30．85％），84．04％的病例以剖宫产结束分娩，产后出血率41．49％，围生儿死亡率95．74‰。【结论】胎盘早剥是妊娠晚期严重并发症，做好孕期保健，重视诱因，注意病情观察，及早诊断，选择恰当的分娩方式并积极处理对改善母儿结局具有重要意义。

未足月胎膜早破60例相关因素分析

胎膜早破（PPROM）是产科常见并发症,其发病率一般占分娩的2.7%-17%。现对我院2006年7月至2009年9月的60例PPROM患者的临床资料分析报道如下。

“猪无名高热性疾病”的流行特点及研究

"猪无名高热性疾病"病因复杂,发病猪只一般治疗难度较大,防制上应坚持预防为主,通过实施切实有效的生物安全措施,从封闭猪场、加强饲养管理,强化消毒工作,提前保健预防,疫苗免疫等方面预防"猪无名高热性疾病"的发生。当猪场暴发"猪无名高热性疾病"时,现场控制的重点是尽量避免健康的猪只少发病,尽量降低发病率和死亡率,而不是集中精力治疗病猪。

薄壁水池混凝土结构变形缝间距设置分析研究

长大薄壁结构容易在早龄期发生非受荷开裂现象,不仅影响结构的安全使用,也大大影响结构的耐久性,因此各类规范对此类混凝土结构的一次浇筑长度提出了限制要求。但是,对长大混凝土结构而言,较多的变形缝将延长结构工期,增大基坑开挖风险。为得到合适的变形缝设置间距,以上海竹园三厂沉淀池为例,通过数值计算方法,计算分析了一次浇筑30 m、50 m、70 m、90 m共4种工况下的混凝土早龄期开裂风险,并以此提出了此类薄壁结构减少变形缝、增加一次浇筑长度的依据。

Study on the Control Technique of "On" and "Off" Years of Early Maturing Citrus unshiu

In order to change the universal phenomenon of alternate bearing of early- grown Satsuma orange （Citrus unshiu Marc.） in north Guizhou province, and provide references for setting scientific cultivation techniques and rational management mea- sures for Satsuma orange gardens, cultivation techniques for controlling alternate bearing of the early-grown Satsuma orange were tested and optimized for 7 years （2005 to 2011）. The results showed that production of local early-grown Satsuma or- ange orchards could be significantly improved through the application of cultivation techniques such as rational trimming, strengthening soil, fertilizer and water manage- ment, conducting flower and fruit management pertinently, effective and comprehen- sive control of disease and insects. The yield difference between ＂on＂ and ＂off＂ years was 10%-15%, and the orchards with serious alternate bearing phenomenon were changed into the one with high and stable yield. Meanwhile, the commercial rate of early-grown Satsuma orange fruit enhanced, leading to good economic benefits.

Role of supply chain management in target costing

Standard costing is used as a control for product costing. But with life cycle becoming shorter, costing should be done at the design and development stage of a product. This is achieved through target costing.The implementation of target costing and target pricing is done with the ultimate purpose of cost reduction, cost understanding, continuous improvement, competitiveness, early purchasing and supplier involvement, and improved design and accountability by manufacturers. The study explores the participation of the purchasing and supply chain management＇s role in target costing and target pricing process. Supply management plays an active role in monitoring the ongoing cost and performance of suppliers during the early stages of product development. Implementation of target costing and target pricing in various organizations are also explored. Leading Japanese manufacturers have used target costing and target pricing systems to their advantage and the paper also examines the adaptation of the Western companies to these proactive cost management techniques to improve their product development processes.

沉管结构预制阶段裂缝控制参数影响分析

混凝土沉管隧道在越江和跨海工程中得到了较广的应用,预制方法从传统的干坞法预制发展为工厂法预制。沉管隧道的混凝土管节在工厂化预制阶段容易因温度梯度、收缩以及约束等原因出现危害性裂缝,影响沉管结构的正常使用和长期耐久性。采用数值仿真和试验研究相结合的方法,基于水化度方法建立了混凝土材料模型,综合考虑混凝土温度变形、自收缩和徐变等时变体积变形以及热-力学边界条件;针对沉管工厂化预制的各个阶段,对配合比、入模温度、养护环境温度、模板、拆模时间、养护时间以及保温养护措施等参数进行了对比分析;在温度场和应力场计算结果基础上,以开裂风险指数为主要判断依据,得到了沉管在预制过程中裂缝控制的关键影响因素。研究结果表明:工厂化预制沉管隧道混凝土管节的入模温度和养护温度是沉管结构预制各阶段的关键裂缝控制影响因素,两者之间的关系对沉管结构的裂缝控制有直接影响,入模温度较高时,可以通过提高养护温度来保证沉管开裂风险指数大于1.4。在冬季时,养护温度的提高使沉管有较好的保温效果,进而降低内外温差和开裂风险;但在夏季还需注意控制其内部最高温度。最后开展足尺节段温控试验,提出入模温度和养护温度的控制措施,并通过温度监测得到较高环境温度下的温度控制指标,以指导工厂化混凝土沉管预制阶段裂缝控制。

Controls of Late Jurassic-Early Cretaceous tectonic event on source rocks and seals in marine sequences,South China

Thermal evolution of source rocks and dynamic sealing evolution of cap rocks are both subjected to tectonic evolution.The marine sequences in South China have experienced superposed structural deformation from multiple tectonic events.To investigate the effectiveness of preservation conditions,it is of great importance to understand the controls of key tectonic events on the dynamic evolution of cap rocks.This paper discusses the controls of Late Jurassic-Early Cretaceous(J3-K1) tectonic event on source and cap rocks in marine sequences in South China based on the relationships between J3-K1 tectonic event and the burial history types of the marine sequences,the hydrocarbon generation processes of marine source rocks,the sealing evolution of cap rocks,the preservation of hydrocarbon accumulations,and the destruction of paleo-oil pools.The study has the following findings.In the continuously subsiding and deeply buried areas during the J3-K1 period,marine source rocks had been generating hydrocarbons for over a long period of time and hydrocarbon generation ended relatively late.At the same time,the sealing capacity of the overburden cap rocks had been constantly strengthened so that hydrocarbons could be preserved.In the areas which suffered compressional deformation,folding and thrusting,uplifting and denudation in J3-K1,the burial history was characterized by an early uplifting and the hydrocarbon generation by marine source rocks ended(or suspended) during the J3-K1 period.The sealing capacity of the cap rocks was weakened or even vanished.Thus the conditions for preserving the hydrocarbon accumulations were destroyed.The continuously subsiding and deeply buried areas during the J3-K1 period are the strategic precincts of the petroleum exploration in marine sequences in South China.

Improved Scheme of Internet Congestion Control under Moving Average Filter

An important task of Internet congestion control is inhibiting sporadic data flow to maintain a suitable window size or route queue length. Such a requirement is just consistent with the basic idea and function of a moving average filter. In this paper one prior Internet congestion control model, named transmission control protocol (TCP)/random early detection (RED) stroboscopic model, is studied, and then one new scheme is proposed to enlarge its stable domain, where a simple moving average filter is introduced to inhibit sporadic data flow as possible. In the novel scheme the bifurcation phenomenon is postponed without any extra controller. The effectiveness of the new scheme is verified by theoretical analyses and numerical simulations.

妊娠晚期合并细菌性阴道病对妊娠结局的影响

目的确定晚期妊娠合并细菌性阴道病（BV）的发病情况和对妊娠结局的影响。方法对南阳市卧龙区妇幼保健院3a来妊娠晚期32-37周孕妇4000例采用妇炎知（细菌性阴道病联合测定试剂盒）进行BV筛查的临床资料进行回顾性分析。结果晚期妊娠32～37周后合并BV者1092例发病率为27．3％。甲硝唑治疗组546例437例有效控制BV，甲硝唑片治疗BV有效率为80．0％，早产胎膜早破57例发病率为10．4％；未治疗对照组546例，早产胎膜早破138例发病率为25．3％。结论对晚期妊娠妇女进行BV的筛查和甲硝唑治疗可降低早产胎膜早破发生（P〈0．05），减少不良妊娠结局提高产科质量。