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As an outerdressing, 5sheet nonabsorbent gauze is enough to prevent from environmental pollution, and it has an advantage over absorbent gauze. Absorbent gauze with 15 sheets is enough to protect burnwound. As an insidedressing, artificial biological dressing is favorable to maintain internal environment of histiocyte coming back to life, and it has little stickiness favorable to replacement of dressing on burnwound.

以非脱脂纱布作为外层敷料优于脱脂纱布，5层非脱脂纱布即可达到隔离外界污染的作用；以15层脱脂纱布作为包扎烧伤创面的敷料，可达到有效保护创面的作用；人造皮膜作为内层敷料，有利于维持创面组织细胞复苏的内环境；人造皮膜与创面的黏性较小，有利于敷料的更换。

The concept of zero-path tracking in homotopy is generalized into minimum-path tracking and a new method for the training of multi-layer perceptron is thus put forward──the homotopic BP algorithm. An analysis is made on the convergence property of the proposed method.

采用同伦BP算法进行多层前向网络的训练高小榕，杨福生（清华大学电机及应用电子工程系北京100084）摘要本文把同伦论中零点路径跟踪的概念推广到多层前向网络能量函数极小点路径的跟踪，从而提出多层前向网络一种新的训练方法──同伦BP算法（包括教师同伦和输入同伦），并且分析了其收敛性质。

The anatomical study deepens the knowledge of G-type conducting cells: 1 It proves the theory of two depositional process for secondary wall (Bierhorst, 1960): the discontinuous cellulose layer is laid down before the continuous lignified layer; the former layer is prone to be broken down, while the latter is highly decay-resistant; 2 It suggests that the cellulose primary and secondary walls of tracheids are not perforated. Instead of longitudinal pits (Li, 1992), the lignified tracheid secondary wall of Hsüa possesses irregular simple perforations; 3 In Hsüa reflexa and Huia gracilis, the perforation casts may represent the thickness of lignified secondary wall; 4 The wall structure of G-type tracheid is diversified. At the genus level, the secondary wall structure differs in the distribution, internal shape and structure of the perforations; 5 Perforations of some G-type tracheids combine the characters of S-type tracheids in their distribution, density and diameter.

解剖学的研究加深了对G-型输水管胞的认识 1）验证了管胞次生壁分两个阶段形成的理论（Bierhorst，1960），即先后形成不连续的纤维质层和连续的木质化层，前者易被分解，后者抗侵蚀性强；2）证明管胞纤维质的初生壁和次生壁不具穿孔，Hsüa管胞的木质化次生壁具有不规则的简单穿孔，而不是纵列的纹孔（Li，1992）；3）Hsüa reflexa和Huia gracilis的穿孔铸体可代表木质化次生壁的厚度；4）G-型管胞壁层结构具多样性，植物属一级的分异主要表现在次生壁穿孔的分布、孔腔形状和结构的不同；5）某些G-型管胞的穿孔在其分布、密度和孔径方面可兼有S-型管胞的特征。

Under the scanning electron microscope , for the first time we compare and study both the coalified tracheids through chemical maceration and permineralized tracheid lumen casts. This method reveals the microstructures of wall and perforations of G-type tracheids: 1 The lignified layer of secondary wall is composed of uneven material and further divided into S〓, S〓, S〓 layers; with the smooth enclosing wall, the perforation is internally dumbbell-shaped; 2 In Huia gracilis, the enclosing wall of tracheidal perforation contracts and possesses secondary perforations. The perforation has thickened border facing the tracheid lumen.

本文首次在扫描电子显微镜下对比研究经化学浸解获得的碳质管胞和矿化的管胞腔铸体，明确揭示出了G-型管胞壁层和穿孔的显微结构：1）Hsüa reflexa次生壁木质化层的组成不均一，分为S〓、S〓和S〓层；穿孔腔为哑铃形，腔壁光滑；2）Huia gracilis的穿孔腔收缩，腔壁上发育次级穿孔，孔口具有边缘加厚。

There are many depositional characteristics of storm deposits in the Lower Sinian Jiayunn Formation around Xuzhou area , including scouring filling structures, hummocky cross stratifications, storm flow generated intraclastic limestones, graded bedding and convolute bedding.

徐州地区震旦系下部的贾园组具有丰富典型的风暴沉积标志，包括各种冲刷-充填构造、丘状交错层理、碎屑流沉积、粒序层理及卷曲层理等。

Silicon nitride passivation layer existed in standard CMOS process is used as hydrogenous ions sensitive layer, ISFET with multi-layer floating electrode structure works as the sensing unit.

介绍了一种基于上华0.6μmCMOS工艺实现的pH值传感器集成电路的设计和研究，它采用标准CMOS工艺提供的Si3N4钝化层作为氢离子敏感层，并以多层浮栅结构的ISFET作为传感单元。

The paper introduces the flow testing technology for seperate zone waterflooding injection well,it can test water injection rate volume,individual-layer pressure and temperature of every layer,mirrorreally the status of hygroscope and check the sealing property of flooding packer.

介绍分层注水井流动测试技术，测试进入每一个层段的注水量、压力、温度等参数，能真实的反映出各个层段的吸水状况；同时，在测试过程中验证注水层段封隔器的密封性，不会造成地层污染。

The basidioma is composed mainly of sterile tightly packed hyphae; in most species there is a distinct fertile layer, the hymenium, on the surface of the basidioma that bears the basidial hyphae which, after meiosis, give rise to the basidiospores.

担子果主要由紧密缠绕的不育菌丝组成，多数种类还有明显的可育层子实层，子实层位于担子果的表面，由菌丝形成担子，减数分裂后产生担孢子（参见 basidium

The results showed that Pleurotus tuber-regium was solitary or tufted, it's primodium was milk-white and weight was generally 48~78g, the biggest was 220g. The structure of Pleurotus tuber-regium included three stories: the outmost story was epidermis, the middle was medulla, and the undermost was hymenium.

结果表明，虎奶菇子实体为单生或丛生，原基乳白色，一般朵质量为48~78g，大的可达220g；其结构分为3层，上层表皮层，中间层为髓部，下表层为子实层，表面起伏不平，有不规则疣状突起。

Our skin every day on their own metabolism, resulting from the basal cells gradually reach the skin surface, and then become a cuticle, the skin hyperkeratosis cycle is usually around 28 days, due to the environment, season, UV, rest is not normal and other factors, sometimes cause slow metabolism, so our skin piles up thicker stratum corneum, horny excessive accumulation, it will allow a transparent discussion so that the skin does not feel a sense of, and have lost the flexibility of the original, so fixed and the appropriate exfoliation, dander can be removed, so that the skin is more translucent.

我们的肌肤每天都会自行新陈代谢，由基底层产生的细胞会慢慢的到达肌肤的表面，然后成为角质层，皮肤的角化周期通常约为28天，由于环境、季节、紫外线、作息不正常等因素，有时会使新陈代谢变得缓慢，所以我们的皮肤表面角质层越堆越厚，角质过度的堆积，就会容议让肌肤感觉没有透明感，也失去原本的弹性，所以固定且适当的去角质，可以将皮屑去除，让肌肤更晶莹剔透。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐