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Vacuum belt hydroextractor （also named fixed rubber belt vacuum filter） is a new solid-liquid separating equipment with high efficiency and continuous operation, based on introduction, assimilation and digestion of the techniques of the same products overseas. It has achieved solid-liquid separation by making full use of material gravity and vacuum suction. In terms of its structure, filtering section is arranged horizontally lengthwise, and length of filtering section can be fully used to fulfill in turn such a process covering filtering, rinsing and sucking up, with advantages of high filtering efficiency, productivity, good rinsing effect, wide application range, simple operation, stable running, convenient maintenance and service.

真空皮带脱水机也叫固定真空室式橡胶带式过滤机；是我公司在引进、消化和吸收国外同类产品技术基础上，研制的一种新型、高效、并可连续操作的固液分离机械设备，同时它也是一种充分利用物料重力和真空吸力实现固液分离的机械设备；在结构上真空区沿水平方向布置，利用真空区的长度可以连续完成过滤、洗涤、吸干等不同工艺过程，具有过滤效果高、生产能力大、洗涤效果好、应用范围广、操作简单、运行平稳、维护保养方便等优点；特别适合于过滤固相颗粒粗、密度大及滤饼需要多次洗涤的悬浮液料浆，可以广泛应用于冶金、矿山、化工、造纸、食品、制药及环保等工业部门的固液分离；尤其在湿法烟气脱硫中的石膏脱水方面有着很好的应用。

As a differential detection is used between the intercarrier, the proposed algorithm overcome the high sensitivity to timing error of conventional algorithm and is robust to multi-path. The effect of sample frequency offset can't be ignored in a continuous OFDM system of a large number of subcarriers. The estimation precision of the conventional algorithm is low and the realization is complex. A joint estimation of sample frequency offset and fine frequency offset based on difference operation is proposed. As averaging use a large number of samples in a maximum likelihood algorithm, the estimation precision is very high. The use of difference operation cancel the effect of carrier frequency offset, and the proposed sampling frequency estimation algorithm is robust to carrier frequency offset.

最后，本文对连续系统中的采样频率和载波频率精同步技术进行较为深入的研究，由于子载波数目大的连续OFDM传输系统中，采样频率偏差不可忽视，以往的采样频率估计方法精度低、实现复杂，因此本文提出了一种基于差分处理的采样频率偏差和精载波频率偏差联合估计算法，利用了最大似然算法进行采样频率偏差的估计，由于采用了差分处理方法，消除了载波频率偏差对采样频率偏差估计的影响，采用的最大似然算法对大量样点进行平均化处理，所以，相对以往算法，提出的联合算法估计精度高，而且采样频率偏差估计对载波频率偏差具有鲁棒性。

Abstract］ objective to explore the failure causes of mastoidectomy and precautions.methods the operation findings of 37 cases who underwent revision mastoidectomy from 1995 to 2005 were analyzed for causes of the primary procedures and revision mastoidectomy failure.results original symptoms disappeared.all cases achieved a dry ear after mastoidectomy 1～3 months.conclusion causes of failure of mastoidectomy include unfamiliarity with regional anatomy,absence of skill of surgeons,unadequate opening of mastoidale,and clinical experiences.each of these can result in residual lesion and inadequate drainage.some exceptions can also result in reoperation.to resect the pathological changes tissue thoroughly,to remain good drainage after operation,to manage some execptions are keys to prevent reoperation.

目的 探讨乳突根治术不能干耳原因及预防措施。方法对我科1990~2005年收治的37例乳突根治术不能干耳患者的再次乳突手术所见进行分析，并行二次乳突根治术。结果术后1～3个月患者原有症状消失、干耳。结论乳突根治术失败原因主要是术者中耳乳突解剖不熟、基本功不过硬、临床经验不足导致病灶残留、引流不畅和乳突尖开放不够及某些特殊情况所致。术中彻底去除病灶，保证术后引流通畅及特殊情况的处理，是防止二次手术的关键。

Results Compared with CRF group, nephrogenic hypertension of hemin group was reduced significantly at the 6th, 8th, 10th week after operation, and followed with the decrease of serum creatinine, BUN,urinary protein and the improvement of nephrogenic anemia at the 10th week after operation. Hemin not only increased the expression of HO-1, reduced the expression of ET-1 in the kidney, but also increased the concentration of carbon monoxide, reduced the level of ET-1 in the plasm.

同时，在术后第10周hemin组比CRF组血肌酐、尿素氮、尿蛋白显著降低(P＜0.05)，贫血明显改善(P＜0.05)；肾组织中HO-1表达明显增加，血浆中内源性CO水平明显升高，肾组织和血浆中ET-1水平明显降低(P＜0.05)。

Peribulbar injection of dexamethasone 0.5mg was applied in the experimental group every other day 48 hours after operation to the end of the experiment, and the growth state of conjunctiva in both groups were observed. 2 HA implants from experimental group and control group respectively were extracted for testing the positive expression of VEGF by immunohistochemistry 3,7,14,21,28 days after operation.

术后滴妥布霉素滴眼液4次/d，实验组术后48h起隔日球周注射地塞米松0.5mg和实验结束，并观察两组的结膜生长情况；实验组与对照组分别于术后 3，7，14，21，28d摘取2只HA植入物行免疫组织化学检测VEGF阳性表达情况。

This operation is suitable for the following portal hypertension: simple occlusion of hepatic vein (a pathological type of Budd-Chiari syndrome)thrombosis in portal vein or prehepatic portal hypertension due to cavernous transformation; intrahepatic portal hypertension with rebleeding after treatment of splenectomy or without operation, and the patients with liver function in Child A or B class.

本手术主要适应于以下原因引起的门静脉高压：①单纯化肝静脉闭塞(布-加综合征的一种病理类型)；②门静脉主干血栓形成成海绵样变性引起的肝前性门静脉高压；③肝内型门静脉高压行断流术后再发出血或未行手术，肝功能为Child A和B级者。

Methods 230 cases of lacrimal duct obstruction with chronic dacryocystitis divided randomly into two groups.90 cases in group 1 were given operation of laser assisted dacryocytoplasty combining local drug remedy after dashing out the pyoid secretion at once,140 cases in group 2 were not only dashed out the pyoid secretion but also given antibacterial drug, then given operation of laser assisted dacryocytoplasty combining local drug remedy after inflammation was stable. All cases were callback after a week, and followed up more than 6 months.

方法随机选择230名患有慢性泪囊炎泪道阻塞的患者分为两组。1组90名患者冲出脓性分泌物后马上行泪道激光手术联合局部药物治疗，2组140名患者不仅冲出脓性分泌物，且加强抗感染，炎症稳定后再行泪道激光手术联合局部药物治疗，一周后复查，观察两组疗效，追踪半年以上。

Results In group A, 5 cases underwent elective colectomy. Half year after operation, 3 cases with normal defecation, 2 with constipations relapse. In group B, 8 cases underwent subtotal colectomy and partial rectectomy with cecorectal anastomosis. One with constipations relapse, other patients had 37 times of defecation per day after half year of operation.

结果 A组：采用选择性结肠肠段切除术治疗5例，术后半年内随访，3例大便正常，但有2例便秘复发。B组：采用结肠次全切除和部分直肠切除，行盲直肠吻合术治疗8例，有1例术后半年内便秘复发，其他患者术后半年内排便次数为3～7次/d。

In treatment besides operation chemical treatment becomes more important in order to prevent tumor transfering and relapsing after operation.

在治疗方面，除了手术治疗外，为防止肿瘤转移和复发，术后化疗显得尤为重要。

As mainly being in charge of the club daily operation,the Transportment Depertment summarizedthe club daily operation problems and the improvement goal in this semester at the meeting.

运营部在五四评优中的优异成绩尤其引人注目；资产部总结了本学期俱乐部资产的基本状况；技术部介绍了技术部对技术人员的定位与项目筹备情况。

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！