基于C 语言的串口通讯程序设计

本文着重介绍三线多环回型结构电缆结构的构成 ,设计了新的发送 /接收收程序来防止信息丢失 ,用 Turbo C语言实现了个人计算机同智能仪表的通讯程序设计     

典型造价的根本宗旨是服务和谐社会建设

国家电网公司作为电网建设和运营的主体,是关系国家能源安全和经济命脉的国有重要骨干企业.建设坚强可靠的电网,满足经济社会发展的电力需求,确保国有企业健康可持续发展,为建设和谐社会打下坚实的物质基础是国网公司义不容辞的义务与责任.     

Colorectal hydrosonography in diagnosis of tumorous and inflammatory diseases of the large intestine

PURPOSE: Evaluation as to whether diagnosis of large bowel disease and TNM staging of colorectal carcinoma are possible by colorectal hydrosonography (HUS). METHOD: 52 patients with suspected neoplastic or inflammatory large bowel disease, underwent HUS. Before performing abdominal ultrasound, the colon was filled with fluid. Morphological alterations of the bowel wall were judged benign or malignant. Colorectal carcinomas were classified according to the TNM system. RESULTS: Laparotomy was performed in 46 of 52 patients. Correlation with surgery and histopathology showed that 77% of morphologic alterations of the colonic wall were detected by HUS. While benign lesions of the colonic wall occasionally mimicked malignant disease, colonic carcinomas were reliably diagnosed by HUS, because destruction and invasion of the bowel wall was visible. Carcinomas of the lower part of the rectum, however, were missed in most cases. Accuracy to determine the infiltration depth of colorectal carcinomas was 89%, but hydrosonographic N-staging was unreliable. Inflammatory disease of the large bowel as well as changes complicating the inflammatory bowel disease were accurately diagnosed by HUS. CONCLUSION: In selected patients, colorectal HUS is suited for diagnosis and staging of colonic tumours. It also helps to evaluate inflammatory bowel disease, because small and large bowel can be reliably distinguished from each other and the degree of stenosis of inflamed colonic segments becomes visible. Furthermore, HUS increases the visibility of fistulas.     

光纤光栅液位传感技术研究

介绍了一种新型光纤光栅传感器的在液位测量方面的应用.随着外界应力的变化,光纤光栅的Bragg中心发射波长将发生相应的移动.利用此特性,提出并实现了一种精密的用光纤光栅作为敏感元件测量液面高度的方法,其灵敏度可达0.036 mm/pm,最后分析了系统中的关键环节.     

钢水液位自动检测的新方法

为了实现电渣熔铸曲轴一步整体成型,必须确定挤拐的开始时间,即金属液面的位置。基于自耗电极为规则圆柱体,设计了一种以单片机为主的测重法,间接实现了金属液面的自动检测。该方法由于只反映铸件重量和长度,能够克服传统传感器检测钢水液位影响因素多的缺陷,其检测精度高,可达毫米级,抗干扰能力强。     

基于CMOS图像传感器中DPGA的电容阵列优化研究

结合用于CMOS图像传感器中的低噪声DPGA的性能特点,提出了一种优化电容阵列拓扑结构的方法,讨论了此种结构下由寄生电容引入的时钟馈通和电荷分配效应, 并给出了仿真结果和按照0.35μm CMOS工艺进行流片的版图.测试结果表明,采用改进的电容阵列结构能把采样电容引入的噪声斜率从原来的0.15降低到0.01.     

ISD4004 语音芯片的工作原理及其在智能控制系统中的应用

ISD4004是一种采用CchipCorder专利技术的语音芯片，即此芯片无须A／D转换和压缩就可以直接储存，没有A／D转换误差，在一个记录位（BIT）可存储250级声音信号，相当于通常的A／D记录的8倍，片内集成了晶体震荡器，麦克前置放大器，自动增益控制等，只要很少的外围器件，就可以构成一个完整的声音录放系统。本文介绍了ISD4004的原理，特点，功能和其在智能控制系统中的应用。     

Early and late post-ischaemic recovery of contractile function is affected to different degrees by isoflurane and halothane in the anaesthetized rabbit model

We took advantage of the partial protection exerted by suitable dosages of nicotinamide against the beta-cytotoxic effect of streptozotocin (STZ) to create a new experimental diabetic syndrome in adult rats that appears closer to NIDDM than other available animal models with regard to insulin responsiveness to glucose and sulfonylureas. Among the various dosages of nicotinamide tested in 3-month-old Wistar rats (100-350 mg/kg body wt), the dosage of 230 mg/kg, given intraperitoneally 15 min before STZ administration (65 mg/kg i.v.) yielded a maximum of animals with moderate and stable nonfasting hyperglycemia (155 +/- 3 vs. 121 +/- 3 mg/dl in controls; P < 0.05) and 40% preservation of pancreatic insulin stores. We also evaluated beta-cell function both in vitro and in vivo 4-9 weeks after inducing diabetes. In the isolated perfused pancreas, insulin response to glucose elevation (5-11 mmol/l) was clearly present, although significantly reduced with respect to controls (P < 0.01). Moreover, the insulin response to tolbutamide (0.19 mmol/l) was similar to that observed in normal pancreases. Perfused pancreases from diabetic animals also exhibited a striking hypersensitivity to arginine infusion (7 mmol/l). In rats administered STZ plus nicotinamide, intravenous glucose tolerance tests revealed clear abnormalities in glucose tolerance and insulin responsiveness, which were interestingly reversed by tolbutamide administration (40 mg/kg i.v.). In conclusion, this novel NIDDM syndrome with reduced pancreatic insulin stores, which is similar to human NIDDM in that it has a significant response to glucose (although abnormal in kinetics) and preserved sensitivity to tolbutamide, may provide a particularly advantageous tool for pharmacological investigations of new insulinotropic agents.     

The hydro-MRT of chronic inflammatory bowel diseases]

OBJECTIVE: This study examined the effects of an interpersonal stressor on subsequent calorie intake in females with (N = 20) and without (N = 20) significant bulimic symptomatology. METHOD: Subjects participated in two laboratory sessions that differed according to experimental condition (stress versus no stress), completed self-report measures of mood and anxiety before and after the experimental task, and were provided with an array of snack foods after each session. RESULTS: Counter to the hypothesis, women with bulimic symptoms did not differentially increase their intake when exposed to stress. However, results for the intake of each macronutrient indicated that both bulimic and control women increased their consumption of carbohydrates following the stressor. Thus, stress was related to increased carbohydrate consumption by all subjects but did not differentially affect the consumption of women with bulimic symptoms. CONCLUSIONS: It may be that women with bulimic symptoms are not differentially vulnerable to eating in response to stress or that current laboratory paradigms are unable to detect differences in eating following a stressor.     

Superior and inferior cavography as well as azygography and retroperitoneal venography: methods, indications and results (author's transl)

The diagnostic spectrum for venography of the trunk is broad. During the traditional superior and inferior cavography, which should be used for clinical bone marrow functional blockage in connection with a confirmed tumor or for thrombosis, the combined retroperitoneal venography and cavography which we developed for clinical use as well as direct azygography provide valuable supplementary information which can be significant especially for preoperative questions. In the case of carcinoma of the esophagus or stomach, the question whether or not the tumor can be surgically removed or whether the tumor is already inoperable may be answered before surgery. In addition, direct azygography is suitable as a method to seach for lymph nodes metastases in carcinomas of the lung, stomach, kidney, adrenals and pancreas which cannot be ascertained via mediastinalscopy, and for systemic diseases. In addition to the prognostic evaluation of the tumor and the additional preoperative evaluation of neighboring tumors, various bone diseases of the lumbar vertebrae, e.g., inflammatory, tumerous and traumatic changes in the spine, may be localized on the retroperitoneal venogram and cavogram. They can also be used successfully to seach for metastases or in the case of a dislocation of an intervertebral disk. The execution of the various methods is relatively simple and they may be performed on a patient capable of surgery.