较一般为小的

In order to obtain more general solution of second order linear differential equation with constant coefficients, which is important in theory and practice, on the basis of knowing a special of the second order linear differential equation with constant coefficients and by using the method of variation of constant, the second order linear differential equation with constant coefficients is transferred to the reduced differential equation and a general formula of the second order linear differential equation with constant coefficients is derived.

为了更多地得到理论上和应用上占有重要地位的二阶常系数线性非齐次微分方程的通解，这里使用常数变易法，在先求得二阶常系数线性齐次微分方程一个特解的情况下，将二阶常系数线性非齐次微分方程转化为可降阶的微分方程，从而给出了一种运算量较小的二阶常系数线性非齐次微分方程通解的一般公式，并且将通解公式进行了推广，实例证明该方法是可行的。

Blocked by the scheduled project, the tidal current near the coast will move around the project. 4. Changes of SSC before and after the project The general characteristics of the SSC both before and after the scheduled project are as the following: the SSC is lower in the waters of the project ranging from 11 mg/L to 19 mg/L; the SSC isolines are generally parallel to the isobaths, decreasing towards the coast; the SSC in flood tide is higher than that in ebb tide, so are high tide and spring tide than low tide and neap tide, respectively.

4工程前后悬沙量变化工程前后悬沙分布的基本规律：在工程海域，悬沙量均保持为较低值，大致为11～19mg/L；悬沙等值线基本平行于等深线，随深度的减小浓度减小，一般到近岸区达到最低；悬沙量的日周期性变化规律明显，悬沙量涨潮时大于落潮时，高潮时大于低潮时，大潮时大于小潮时。

Bamboo variation ofmicrodensity of all age-degree and all height bamboo from bamboo green tobamboo yellow as follows:The downtrend ladder of microdensity the firststage from bamboo green to bamboo yellow is relatively large,normally at theplace 0.35 from bamboo hull(the thickness of from bamboo hull to bambooyellow is 1)micro-density downtrend ladder begin to get smaller,variancerange of microdensity is smaller.When reaching near bamboo yellow area,microdensity reaches its minimum value,and when reaching bamboo yellowsection density increase rapidly,the minimum density of bamboo is only 50% orless of maximum density.Bamboo yellow is comprised of stone cells whichhave thick cell wall,so its density is high,normally 50% to 100% more thanminimum density.Bamboo yellow′s lay thickness is thin,normally the samethickness for all age-degree and all height bamboo,about 0.8mm.From 1 age-degree bamboo to 2 age-degree bamboo during growth,the increase of averagedensity is mainly in bamboo pulp section,from 3 age-degree bamboo to 4 age-degree bamboo,the decrease of average density is mainly decrease in the pulpsection.Same age,same height,the less the density ladder of bamboo radialthickness,the higher the mechanical strength.

所有年龄所有高度的竹材微密度从竹青到竹黄对材性变异规律如下：从竹青到竹黄开始下降梯度较大，一般到相对竹皮距离0.35左右处(整个竹壁厚度为1)，竹材微密度下降梯度减小，微密度的变化范围变小，到近竹黄处，微密度达最小值，而后到竹黄部位密度大幅上升，竹材最小密度一般只有最大密度的50％或更低，竹黄由厚壁的石细胞组成，所以密度较大，一般比最小密度增大约50％-100％，厚度较薄，不同年龄不同高度竹材的竹黄厚度相差无几，约在0.8mm左右；竹材从1度竹到2度竹生长过程中，平均密度的增长主要发生在竹肉部分，从3度竹到4度竹生长过程中，平均密度的下降主要发生在竹肉部分，同一年龄同一高度，竹壁厚径向的密度梯度越小，力学强度越高，随着年龄的增大，密度梯度越来越小(1度竹除外)，随着高度增加，密度梯度越来越大。

Carpet : There are few things worse than a soggy bathroom mat. That's why we are laying down the Aqua carpet by Finnish designer, Hanna Korvela. It is a reversible woven carpet made from water-repellants, it is available in seven color including turquoise, red and black - but we are fond of the soothing beige version. Korvela set up her design studio in 1994, making a name for herself with Duetto, a rug crafted in paper yarn and cotton tricot.

地毯 ：没有比浴室潮湿踏垫更糟的了，为甚麼我们会想躺在芬兰设计师 Hanna Korvela 所设计的 Aqua 地毯的原因了；双面编织地毯具防水功能，有七种不同颜色，包括蓝绿色、红色与黑色，但一般较钟情於较舒坦的米黄色。1994 年 Korvela 设立设计工作室以 Duetto 命名，房内所用小地毯以纸纱线和棉混编而成。

The unit of radioreaction in ethmoidal sinus was ethmoidal cell. Several ethmoidal sinus cells were fused to patch in severe cases. The radioreactions in ethmoidal sinus, maxillary sinus and sphenoidal sinus were seen within three months, after three months and after one year respectively. And nasal sinus radioreactions of most cases were not absorbed spontaneously after one year. When the two kinds of radiotherapies were equal in dosing level, there was no obvious difference between them in respect to the radioreaction of accessory sinus, but when the dosing level was above 3182GBq, the radioreaction of accessory sinus was remarkably increased, compared with those caused by lower-dose radiotherapies.

筛窦放射反应以筛窦小房为单位，重者也可以多个小房融合成片状；筛窦的放射反应在放疗后3个月内即可出现，上颌窦常在3个月以后出现放射反应，而蝶窦一般在放疗后1年以后才出现；大多数病例副鼻窦放射反应在1年以后难以自动吸收、消退；两种方法放疗剂量相同时所致副鼻窦放射反应无明显差别，但放疗剂量在3182 GBq以上时所致副鼻窦放射反应较其它放疗剂量时明显增高。

Green maintenance is burgeoning theory and technology of modern equipment management and maintenance. Through the discussion for the concept of green maintenance, its feasibility is analyzed. Some key technologies of coalmine machine green maintenance are studied stressfully. The result demonstrates that green maintenance has a broad application prospect.

绿色维修目前还没有统一的定义，一般认为是机电设备在维修过程中，符合特定的环境保护要求，对生态环境无害或危害性较小，资源利用率最高，能源消耗最低的现代维修管理与维修方式，概括地说，绿色维修是以环境保护为核心的机电设备维修。

Two series of polyurethane acrylate grafted acrylic resins (Acr-g-TPU-PETA and Acr-gPPU-PETA) self-emulsifying systems are obtained by grafting -NCO group modified polyurethane acrylates with acrylic copolymer prepared from n-butyl acrylate, styrene,βhydroxyethyl methacrylate and acrylic acid The self-emulsifying systems showed Newtonian fluidity with viscosity closed to that of water, the solid contents were around 30% The T〓 of 15～4℃ for dried film before photocuring favored film formation at room temperature DSC and DMA results showed that PU-PETA is compatible with acrylic resin in the grafted resin The TG and dTG curves for Acr-g-PU-PETA samples were substantially different from the corresponding blends, and the brodened dTG peaks for photocured grafted resin suggest that there might be multiple interactions among chain segments The photocued film of the grafted resins self-emulsifying system exhibited good overall properties with polyurethane acrylate grafts ranging from 30% to 50%, and Acr-g-TPU-PETA series showed better properties than Acr-gPPU-PETA series The adhesion of the photocured film was 1～2 grade, impact strength was 50kg-cm and flexibility was 1mm The Shore hardness and the adhesion of the film decreased markedly if PETA was replaced by HEMA as photoactive group due to the lower C=C double bond content in the grafted resin The polyhydroxy amine-linked thioxanthones photoinitiators can be evenly dispersed in self-emulsifying system without color spot appearing in the dried film The films photocured with IV〓～IV〓 generally exhibited higher Shore hardness, gloss and solventresistance than that cured with Irgacure 2959 and did not induce the rusting of the iron substrate Pigmenting with titanium oxide had no effect on the photocuring The polyhydroxy amine-linked thioxanthone IV〓 and IV〓 can be new candidates for the formulation of titanium oxide pigmented photocurable water-borne coatings for their pale-yellow appearance and slight interference with the color of the coatings WB 4759 with high water-solubility coalesced and separated from the dried resin film, and even induced the rusting of iron substrate.

以丙烯酸丁酯，甲基丙烯酸-β-羟乙酯，丙烯酸及苯乙烯合成厂丙烯酸共聚树脂，并与含-NCO端基的聚氨酯丙烯酸酯接枝反应，经水性化后，得到两个系列（Acr-g-TPU-PETA和Acr-g-PPU-PETA）各5个不同配比的丙烯酸树脂接枝聚氨酯丙烯酸酯自乳化体系，粘度与水相近，为牛顿流体，固含量30％左右。光固化前干燥涂膜的玻璃化转变温度在-15℃～4℃之间，有利于室温下成膜。DSC及DMA谱表明两种树脂基本相容。Acr-g-PU-PETA的热失重行为明显不同于共混材料，接枝样dTG峰明显宽化，表明接枝样中链段之间的相互作刚有多重性，丙烯酸树脂与聚氨酯之间有一定的相容性。接枝树脂自乳化体系光固化涂层的综合性能以聚氨酯丙烯酸酯成分为50％～30％者相对较好，且以Acr-g-TPU-PETA系列更理想。光固化膜的附着力为1～2级，冲击强度为50kg·cm，柔软性多为1mm。以HEMA代替PETA作为接枝树脂的活性基团，碳—碳双键密度太低，光固化膜交联点太少，硬度和附着力均较差。多羟基胺连硫杂蒽酮光引发剂能均匀分散于树脂自乳化体系和接枝树脂干膜中，不出现色斑，光固化膜肖氏硬度一般高于以Irgacure 2959为光引发剂的光固化膜，光泽度及耐丁酮溶剂性能均有所提高，不会诱导铁基生锈，钛白着色对光固化结果几乎没有影响。本论文所合成的多羟基胺连硫杂蒽酮光引发剂IV〓与IV〓为浅黄色，对光固化涂层的颜色干扰较小，为配制钛白着色光固化水性涂料提供了新的光引发剂。水溶性太强的WB 4759在干膜中易聚结析出，且对所附着的铁基有诱导锈蚀作用。

The face of financial crisis brought about by pressure, Pudong showed strong anti-volatility and risk, and as a result of 18 years in the development and opening up of Pudong in order to shape the modern service industry and high-tech technology industry, mainly of industrial structure and trade structure in general trade as the main body, a smaller proportion of the export processing trade, so the new district did not occur capacity emptying enterprises, as well as lockouts, work stoppages, but no industry, the scale of decline.

面对金融危机带来的压力，浦东表现出较强的抗波动性和抗风险性，由于在18年的开发开放中，浦东初步形成了以现代服务业和高新技术产业为主的产业结构，贸易结构以一般贸易为主体，出口加工贸易比重较小，因此新区并没有出现企业产能的放空，乃至关厂、停工，更没有出现行业性、规模性下滑。

Ordinary no destruction , the ossicular chain can be erosions and destruction , but more slight and no transitional .the major CT findings in simple chronic middle ear on 2 patients were soft tissue in middle ear cavity ,and 1 patient findings hydropneumo, the bone of tympanic cavity cirrhosis ,no destruction .

其它征象包括乙状窦、鼓室盖、水平半规管、面神经管水平段骨质破坏。29例肉芽肿型中耳炎CT表现为中耳腔内的软组织密度影，部分有液平，鼓室壁增生、硬化，骨质破坏少见，听小骨可出现吸收破坏，但程度较轻，一般无移位。2例单纯型中耳炎表现为中耳腔内的软组织密度影，1例有液平，鼓室壁骨质硬化，无骨质破坏。

Leakage in the initial observation to determine the basis of the leakage site, and then manually set car observation, if the leakage were no significant changes in static and dynamic sealing ring problem; such as the disk when there are significant changes in leakage can be concluded that the dynamic , static friction ring problems; such as leakage of medium along the jet axis, w你好le moving most of Central ring problems, leakage to the surrounding medium or from the water spray cooling holes in the leakage, the seal ring for static failure.

杂质泵安装静试时泄漏机械弥缝安装调试好后，一般要进行静试，察看泄漏量如泄漏量较小，多为动环或静环弥缝圈存在问题；泄漏量较大时，则表白动、静环磨擦副间存在问题在开端察看泄漏量、判断泄漏部位的根蒂根基上，再手动盘车察看，若泄漏量无明显变化则静、动环弥缝圈有问题；如盘车时泄漏量有明显变化则可下定论是动、静环磨擦副存在问题；如泄漏介质沿轴向喷洒，则动环弥缝圈存在问题居多，泄漏介质向四周喷洒或从水冷却孔中漏出，则多为静环弥缝圈失效此外，泄漏通道也可同时存在，但一般有主次区分，只要察看细致，认识结构，一定能正确判断

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。